/* tc-m68k.c -- Assemble for the m68k family Copyright (C) 1987, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000 Free Software Foundation, Inc. This file is part of GAS, the GNU Assembler. GAS is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GAS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GAS; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #include "as.h" #include "obstack.h" #include "subsegs.h" #include "opcode/m68k.h" #include "m68k-parse.h" #if defined (OBJ_ELF) #include "elf/m68k.h" #endif /* This string holds the chars that always start a comment. If the pre-processor is disabled, these aren't very useful. The macro tc_comment_chars points to this. We use this, rather than the usual comment_chars, so that the --bitwise-or option will work. */ #if defined (TE_SVR4) || defined (TE_DELTA) const char *m68k_comment_chars = "|#"; #else const char *m68k_comment_chars = "|"; #endif /* This array holds the chars that only start a comment at the beginning of a line. If the line seems to have the form '# 123 filename' .line and .file directives will appear in the pre-processed output */ /* Note that input_file.c hand checks for '#' at the beginning of the first line of the input file. This is because the compiler outputs #NO_APP at the beginning of its output. */ /* Also note that comments like this one will always work. */ const char line_comment_chars[] = "#*"; const char line_separator_chars[] = ";"; /* Chars that can be used to separate mant from exp in floating point nums */ CONST char EXP_CHARS[] = "eE"; /* Chars that mean this number is a floating point constant, as in "0f12.456" or "0d1.2345e12". */ CONST char FLT_CHARS[] = "rRsSfFdDxXeEpP"; /* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be changed in read.c . Ideally it shouldn't have to know about it at all, but nothing is ideal around here. */ const int md_reloc_size = 8; /* Size of relocation record */ /* Are we trying to generate PIC code? If so, absolute references ought to be made into linkage table references or pc-relative references. Not implemented. For ELF there are other means to denote pic relocations. */ int flag_want_pic; static int flag_short_refs; /* -l option */ static int flag_long_jumps; /* -S option */ #ifdef REGISTER_PREFIX_OPTIONAL int flag_reg_prefix_optional = REGISTER_PREFIX_OPTIONAL; #else int flag_reg_prefix_optional; #endif /* Whether --register-prefix-optional was used on the command line. */ static int reg_prefix_optional_seen; /* The floating point coprocessor to use by default. */ static enum m68k_register m68k_float_copnum = COP1; /* If this is non-zero, then references to number(%pc) will be taken to refer to number, rather than to %pc + number. */ static int m68k_abspcadd; /* If this is non-zero, then the quick forms of the move, add, and sub instructions are used when possible. */ static int m68k_quick = 1; /* If this is non-zero, then if the size is not specified for a base or outer displacement, the assembler assumes that the size should be 32 bits. */ static int m68k_rel32 = 1; /* This is non-zero if m68k_rel32 was set from the command line. */ static int m68k_rel32_from_cmdline; /* The default width to use for an index register when using a base displacement. */ static enum m68k_size m68k_index_width_default = SIZE_LONG; /* We want to warn if any text labels are misaligned. In order to get the right line number, we need to record the line number for each label. */ struct label_line { struct label_line *next; symbolS *label; char *file; unsigned int line; int text; }; /* The list of labels. */ static struct label_line *labels; /* The current label. */ static struct label_line *current_label; /* Its an arbitrary name: This means I don't approve of it */ /* See flames below */ static struct obstack robyn; #define TAB(x,y) (((x)<<2)+(y)) #define TABTYPE(xy) ((xy) >> 2) #define BYTE 0 #define SHORT 1 #define LONG 2 #define SZ_UNDEF 3 #undef BRANCH /* Case `g' except when BCC68000 is applicable. */ #define ABRANCH 1 /* Coprocessor branches. */ #define FBRANCH 2 /* Mode 7.2 -- program counter indirect with (16-bit) displacement, supported on all cpus. Widens to 32-bit absolute. */ #define PCREL 3 /* For inserting an extra jmp instruction with long offset on 68000, for expanding conditional branches. (Not bsr or bra.) Since the 68000 doesn't support 32-bit displacements for conditional branches, we fake it by reversing the condition and branching around a jmp with an absolute long operand. */ #define BCC68000 4 /* For the DBcc "instructions". If the displacement requires 32 bits, the branch-around-a-jump game is played here too. */ #define DBCC 5 /* Not currently used? */ #define PCLEA 6 /* Mode AINDX (apc-relative) using PC, with variable target, might fit in 16 or 8 bits. */ #define PCINDEX 7 struct m68k_incant { const char *m_operands; unsigned long m_opcode; short m_opnum; short m_codenum; int m_arch; struct m68k_incant *m_next; }; #define getone(x) ((((x)->m_opcode)>>16)&0xffff) #define gettwo(x) (((x)->m_opcode)&0xffff) static const enum m68k_register m68000_control_regs[] = { 0 }; static const enum m68k_register m68010_control_regs[] = { SFC, DFC, USP, VBR, 0 }; static const enum m68k_register m68020_control_regs[] = { SFC, DFC, USP, VBR, CACR, CAAR, MSP, ISP, 0 }; static const enum m68k_register m68040_control_regs[] = { SFC, DFC, CACR, TC, ITT0, ITT1, DTT0, DTT1, USP, VBR, MSP, ISP, MMUSR, URP, SRP, 0 }; static const enum m68k_register m68060_control_regs[] = { SFC, DFC, CACR, TC, ITT0, ITT1, DTT0, DTT1, BUSCR, USP, VBR, URP, SRP, PCR, 0 }; static const enum m68k_register mcf_control_regs[] = { CACR, TC, ITT0, ITT1, DTT0, DTT1, VBR, ROMBAR, RAMBAR0, RAMBAR1, MBAR, 0 }; #define cpu32_control_regs m68010_control_regs static const enum m68k_register *control_regs; /* internal form of a 68020 instruction */ struct m68k_it { const char *error; const char *args; /* list of opcode info */ int numargs; int numo; /* Number of shorts in opcode */ short opcode[11]; struct m68k_op operands[6]; int nexp; /* number of exprs in use */ struct m68k_exp exprs[4]; int nfrag; /* Number of frags we have to produce */ struct { int fragoff; /* Where in the current opcode the frag ends */ symbolS *fadd; offsetT foff; int fragty; } fragb[4]; int nrel; /* Num of reloc strucs in use */ struct { int n; expressionS exp; char wid; char pcrel; /* In a pc relative address the difference between the address of the offset and the address that the offset is relative to. This depends on the addressing mode. Basically this is the value to put in the offset field to address the first byte of the offset, without regarding the special significance of some values (in the branch instruction, for example). */ int pcrel_fix; #ifdef OBJ_ELF /* Whether this expression needs special pic relocation, and if so, which. */ enum pic_relocation pic_reloc; #endif } reloc[5]; /* Five is enough??? */ }; #define cpu_of_arch(x) ((x) & (m68000up|mcf)) #define float_of_arch(x) ((x) & mfloat) #define mmu_of_arch(x) ((x) & mmmu) #define arch_coldfire_p(x) (((x) & mcf) != 0) /* Macros for determining if cpu supports a specific addressing mode */ #define HAVE_LONG_BRANCH(x) ((x) & (m68020|m68030|m68040|m68060|cpu32)) static struct m68k_it the_ins; /* the instruction being assembled */ #define op(ex) ((ex)->exp.X_op) #define adds(ex) ((ex)->exp.X_add_symbol) #define subs(ex) ((ex)->exp.X_op_symbol) #define offs(ex) ((ex)->exp.X_add_number) /* Macros for adding things to the m68k_it struct */ #define addword(w) the_ins.opcode[the_ins.numo++]=(w) /* Static functions. */ static void insop PARAMS ((int, const struct m68k_incant *)); static void add_fix PARAMS ((int, struct m68k_exp *, int, int)); static void add_frag PARAMS ((symbolS *, offsetT, int)); /* Like addword, but goes BEFORE general operands */ static void insop (w, opcode) int w; const struct m68k_incant *opcode; { int z; for(z=the_ins.numo;z>opcode->m_codenum;--z) the_ins.opcode[z]=the_ins.opcode[z-1]; for(z=0;zm_codenum]=w; the_ins.numo++; } /* The numo+1 kludge is so we can hit the low order byte of the prev word. Blecch. */ static void add_fix (width, exp, pc_rel, pc_fix) int width; struct m68k_exp *exp; int pc_rel; int pc_fix; { the_ins.reloc[the_ins.nrel].n = ((width == 'B' || width == '3') ? (the_ins.numo*2-1) : (((width)=='b') ? (the_ins.numo*2+1) : (the_ins.numo*2))); the_ins.reloc[the_ins.nrel].exp = exp->exp; the_ins.reloc[the_ins.nrel].wid = width; the_ins.reloc[the_ins.nrel].pcrel_fix = pc_fix; #ifdef OBJ_ELF the_ins.reloc[the_ins.nrel].pic_reloc = exp->pic_reloc; #endif the_ins.reloc[the_ins.nrel++].pcrel = pc_rel; } /* Cause an extra frag to be generated here, inserting up to 10 bytes (that value is chosen in the frag_var call in md_assemble). TYPE is the subtype of the frag to be generated; its primary type is rs_machine_dependent. The TYPE parameter is also used by md_convert_frag_1 and md_estimate_size_before_relax. The appropriate type of fixup will be emitted by md_convert_frag_1. ADD becomes the FR_SYMBOL field of the frag, and OFF the FR_OFFSET. */ static void add_frag (add, off, type) symbolS *add; offsetT off; int type; { the_ins.fragb[the_ins.nfrag].fragoff=the_ins.numo; the_ins.fragb[the_ins.nfrag].fadd=add; the_ins.fragb[the_ins.nfrag].foff=off; the_ins.fragb[the_ins.nfrag++].fragty=type; } #define isvar(ex) \ (op (ex) != O_constant && op (ex) != O_big) static char *crack_operand PARAMS ((char *str, struct m68k_op *opP)); static int get_num PARAMS ((struct m68k_exp *exp, int ok)); static void m68k_ip PARAMS ((char *)); static void insert_reg PARAMS ((const char *, int)); static void select_control_regs PARAMS ((void)); static void init_regtable PARAMS ((void)); static int reverse_16_bits PARAMS ((int in)); static int reverse_8_bits PARAMS ((int in)); static void install_gen_operand PARAMS ((int mode, int val)); static void install_operand PARAMS ((int mode, int val)); static void s_bss PARAMS ((int)); static void s_data1 PARAMS ((int)); static void s_data2 PARAMS ((int)); static void s_even PARAMS ((int)); static void s_proc PARAMS ((int)); static void mri_chip PARAMS ((void)); static void s_chip PARAMS ((int)); static void s_fopt PARAMS ((int)); static void s_opt PARAMS ((int)); static void s_reg PARAMS ((int)); static void s_restore PARAMS ((int)); static void s_save PARAMS ((int)); static void s_mri_if PARAMS ((int)); static void s_mri_else PARAMS ((int)); static void s_mri_endi PARAMS ((int)); static void s_mri_break PARAMS ((int)); static void s_mri_next PARAMS ((int)); static void s_mri_for PARAMS ((int)); static void s_mri_endf PARAMS ((int)); static void s_mri_repeat PARAMS ((int)); static void s_mri_until PARAMS ((int)); static void s_mri_while PARAMS ((int)); static void s_mri_endw PARAMS ((int)); static void md_apply_fix_2 PARAMS ((fixS *, offsetT)); static void md_convert_frag_1 PARAMS ((fragS *)); static int current_architecture; struct m68k_cpu { unsigned long arch; const char *name; int alias; }; static const struct m68k_cpu archs[] = { { m68000, "68000", 0 }, { m68010, "68010", 0 }, { m68020, "68020", 0 }, { m68030, "68030", 0 }, { m68040, "68040", 0 }, { m68060, "68060", 0 }, { cpu32, "cpu32", 0 }, { m68881, "68881", 0 }, { m68851, "68851", 0 }, { mcf5200, "5200", 0 }, { mcf5206e, "5206e", 0 }, { mcf5307, "5307", 0}, /* Aliases (effectively, so far as gas is concerned) for the above cpus. */ { m68020, "68k", 1 }, { m68000, "68008", 1 }, { m68000, "68302", 1 }, { m68000, "68306", 1 }, { m68000, "68307", 1 }, { m68000, "68322", 1 }, { m68000, "68356", 1 }, { m68000, "68ec000", 1 }, { m68000, "68hc000", 1 }, { m68000, "68hc001", 1 }, { m68020, "68ec020", 1 }, { m68030, "68ec030", 1 }, { m68040, "68ec040", 1 }, { m68060, "68ec060", 1 }, { cpu32, "68330", 1 }, { cpu32, "68331", 1 }, { cpu32, "68332", 1 }, { cpu32, "68333", 1 }, { cpu32, "68334", 1 }, { cpu32, "68336", 1 }, { cpu32, "68340", 1 }, { cpu32, "68341", 1 }, { cpu32, "68349", 1 }, { cpu32, "68360", 1 }, { m68881, "68882", 1 }, { mcf5200, "5202", 1 }, { mcf5200, "5204", 1 }, { mcf5200, "5206", 1 }, }; static const int n_archs = sizeof (archs) / sizeof (archs[0]); /* BCC68000 is for patching in an extra jmp instruction for long offsets on the 68000. The 68000 doesn't support long branches with branchs */ /* This table desribes how you change sizes for the various types of variable size expressions. This version only supports two kinds. */ /* Note that calls to frag_var need to specify the maximum expansion needed; this is currently 10 bytes for DBCC. */ /* The fields are: How far Forward this mode will reach: How far Backward this mode will reach: How many bytes this mode will add to the size of the frag Which mode to go to if the offset won't fit in this one */ relax_typeS md_relax_table[] = { {1, 1, 0, 0}, /* First entries aren't used */ {1, 1, 0, 0}, /* For no good reason except */ {1, 1, 0, 0}, /* that the VAX doesn't either */ {1, 1, 0, 0}, {(127), (-128), 0, TAB (ABRANCH, SHORT)}, {(32767), (-32768), 2, TAB (ABRANCH, LONG)}, {0, 0, 4, 0}, {1, 1, 0, 0}, {1, 1, 0, 0}, /* FBRANCH doesn't come BYTE */ {(32767), (-32768), 2, TAB (FBRANCH, LONG)}, {0, 0, 4, 0}, {1, 1, 0, 0}, {1, 1, 0, 0}, /* PCREL doesn't come BYTE */ {(32767), (-32768), 2, TAB (PCREL, LONG)}, {0, 0, 4, 0}, {1, 1, 0, 0}, {(127), (-128), 0, TAB (BCC68000, SHORT)}, {(32767), (-32768), 2, TAB (BCC68000, LONG)}, {0, 0, 6, 0}, /* jmp long space */ {1, 1, 0, 0}, {1, 1, 0, 0}, /* DBCC doesn't come BYTE */ {(32767), (-32768), 2, TAB (DBCC, LONG)}, {0, 0, 10, 0}, /* bra/jmp long space */ {1, 1, 0, 0}, {1, 1, 0, 0}, /* PCLEA doesn't come BYTE */ {32767, -32768, 2, TAB (PCLEA, LONG)}, {0, 0, 6, 0}, {1, 1, 0, 0}, /* For, e.g., jmp pcrel indexed. */ {125, -130, 0, TAB (PCINDEX, SHORT)}, {32765, -32770, 2, TAB (PCINDEX, LONG)}, {0, 0, 4, 0}, {1, 1, 0, 0}, }; /* These are the machine dependent pseudo-ops. These are included so the assembler can work on the output from the SUN C compiler, which generates these. */ /* This table describes all the machine specific pseudo-ops the assembler has to support. The fields are: pseudo-op name without dot function to call to execute this pseudo-op Integer arg to pass to the function */ const pseudo_typeS md_pseudo_table[] = { {"data1", s_data1, 0}, {"data2", s_data2, 0}, {"bss", s_bss, 0}, {"even", s_even, 0}, {"skip", s_space, 0}, {"proc", s_proc, 0}, #if defined (TE_SUN3) || defined (OBJ_ELF) {"align", s_align_bytes, 0}, #endif #ifdef OBJ_ELF {"swbeg", s_ignore, 0}, #endif {"extend", float_cons, 'x'}, {"ldouble", float_cons, 'x'}, /* The following pseudo-ops are supported for MRI compatibility. */ {"chip", s_chip, 0}, {"comline", s_space, 1}, {"fopt", s_fopt, 0}, {"mask2", s_ignore, 0}, {"opt", s_opt, 0}, {"reg", s_reg, 0}, {"restore", s_restore, 0}, {"save", s_save, 0}, {"if", s_mri_if, 0}, {"if.b", s_mri_if, 'b'}, {"if.w", s_mri_if, 'w'}, {"if.l", s_mri_if, 'l'}, {"else", s_mri_else, 0}, {"else.s", s_mri_else, 's'}, {"else.l", s_mri_else, 'l'}, {"endi", s_mri_endi, 0}, {"break", s_mri_break, 0}, {"break.s", s_mri_break, 's'}, {"break.l", s_mri_break, 'l'}, {"next", s_mri_next, 0}, {"next.s", s_mri_next, 's'}, {"next.l", s_mri_next, 'l'}, {"for", s_mri_for, 0}, {"for.b", s_mri_for, 'b'}, {"for.w", s_mri_for, 'w'}, {"for.l", s_mri_for, 'l'}, {"endf", s_mri_endf, 0}, {"repeat", s_mri_repeat, 0}, {"until", s_mri_until, 0}, {"until.b", s_mri_until, 'b'}, {"until.w", s_mri_until, 'w'}, {"until.l", s_mri_until, 'l'}, {"while", s_mri_while, 0}, {"while.b", s_mri_while, 'b'}, {"while.w", s_mri_while, 'w'}, {"while.l", s_mri_while, 'l'}, {"endw", s_mri_endw, 0}, {0, 0, 0} }; /* The mote pseudo ops are put into the opcode table, since they don't start with a . they look like opcodes to gas. */ #ifdef M68KCOFF extern void obj_coff_section PARAMS ((int)); #endif CONST pseudo_typeS mote_pseudo_table[] = { {"dcl", cons, 4}, {"dc", cons, 2}, {"dcw", cons, 2}, {"dcb", cons, 1}, {"dsl", s_space, 4}, {"ds", s_space, 2}, {"dsw", s_space, 2}, {"dsb", s_space, 1}, {"xdef", s_globl, 0}, #ifdef OBJ_ELF {"align", s_align_bytes, 0}, #else {"align", s_align_ptwo, 0}, #endif #ifdef M68KCOFF {"sect", obj_coff_section, 0}, {"section", obj_coff_section, 0}, #endif {0, 0, 0} }; #define issbyte(x) ((x)>=-128 && (x)<=127) #define isubyte(x) ((x)>=0 && (x)<=255) #define issword(x) ((x)>=-32768 && (x)<=32767) #define isuword(x) ((x)>=0 && (x)<=65535) #define isbyte(x) ((x)>= -255 && (x)<=255) #define isword(x) ((x)>=-65536 && (x)<=65535) #define islong(x) (1) extern char *input_line_pointer; static char mklower_table[256]; #define mklower(c) (mklower_table[(unsigned char)(c)]) static char notend_table[256]; static char alt_notend_table[256]; #define notend(s) \ (! (notend_table[(unsigned char) *s] \ || (*s == ':' \ && alt_notend_table[(unsigned char) s[1]]))) #if defined (M68KCOFF) && !defined (BFD_ASSEMBLER) #ifdef NO_PCREL_RELOCS int make_pcrel_absolute(fixP, add_number) fixS *fixP; long *add_number; { register unsigned char *opcode = fixP->fx_frag->fr_opcode; /* rewrite the PC relative instructions to absolute address ones. * these are rumoured to be faster, and the apollo linker refuses * to deal with the PC relative relocations. */ if (opcode[0] == 0x60 && opcode[1] == 0xff) /* BRA -> JMP */ { opcode[0] = 0x4e; opcode[1] = 0xf9; } else if (opcode[0] == 0x61 && opcode[1] == 0xff) /* BSR -> JSR */ { opcode[0] = 0x4e; opcode[1] = 0xb9; } else as_fatal (_("Unknown PC relative instruction")); *add_number -= 4; return 0; } #endif /* NO_PCREL_RELOCS */ short tc_coff_fix2rtype (fixP) fixS *fixP; { if (fixP->fx_tcbit && fixP->fx_size == 4) return R_RELLONG_NEG; #ifdef NO_PCREL_RELOCS know (fixP->fx_pcrel == 0); return (fixP->fx_size == 1 ? R_RELBYTE : fixP->fx_size == 2 ? R_DIR16 : R_DIR32); #else return (fixP->fx_pcrel ? (fixP->fx_size == 1 ? R_PCRBYTE : fixP->fx_size == 2 ? R_PCRWORD : R_PCRLONG) : (fixP->fx_size == 1 ? R_RELBYTE : fixP->fx_size == 2 ? R_RELWORD : R_RELLONG)); #endif } #endif #ifdef OBJ_ELF /* Compute the relocation code for a fixup of SIZE bytes, using pc relative relocation if PCREL is non-zero. PIC says whether a special pic relocation was requested. */ static bfd_reloc_code_real_type get_reloc_code PARAMS ((int, int, enum pic_relocation)); static bfd_reloc_code_real_type get_reloc_code (size, pcrel, pic) int size; int pcrel; enum pic_relocation pic; { switch (pic) { case pic_got_pcrel: switch (size) { case 1: return BFD_RELOC_8_GOT_PCREL; case 2: return BFD_RELOC_16_GOT_PCREL; case 4: return BFD_RELOC_32_GOT_PCREL; } break; case pic_got_off: switch (size) { case 1: return BFD_RELOC_8_GOTOFF; case 2: return BFD_RELOC_16_GOTOFF; case 4: return BFD_RELOC_32_GOTOFF; } break; case pic_plt_pcrel: switch (size) { case 1: return BFD_RELOC_8_PLT_PCREL; case 2: return BFD_RELOC_16_PLT_PCREL; case 4: return BFD_RELOC_32_PLT_PCREL; } break; case pic_plt_off: switch (size) { case 1: return BFD_RELOC_8_PLTOFF; case 2: return BFD_RELOC_16_PLTOFF; case 4: return BFD_RELOC_32_PLTOFF; } break; case pic_none: if (pcrel) { switch (size) { case 1: return BFD_RELOC_8_PCREL; case 2: return BFD_RELOC_16_PCREL; case 4: return BFD_RELOC_32_PCREL; } } else { switch (size) { case 1: return BFD_RELOC_8; case 2: return BFD_RELOC_16; case 4: return BFD_RELOC_32; } } } if (pcrel) { if (pic == pic_none) as_bad (_("Can not do %d byte pc-relative relocation"), size); else as_bad (_("Can not do %d byte pc-relative pic relocation"), size); } else { if (pic == pic_none) as_bad (_("Can not do %d byte relocation"), size); else as_bad (_("Can not do %d byte pic relocation"), size); } return BFD_RELOC_NONE; } /* Here we decide which fixups can be adjusted to make them relative to the beginning of the section instead of the symbol. Basically we need to make sure that the dynamic relocations are done correctly, so in some cases we force the original symbol to be used. */ int tc_m68k_fix_adjustable (fixP) fixS *fixP; { /* Prevent all adjustments to global symbols. */ if (S_IS_EXTERNAL (fixP->fx_addsy) || S_IS_WEAK (fixP->fx_addsy)) return 0; /* adjust_reloc_syms doesn't know about the GOT */ switch (fixP->fx_r_type) { case BFD_RELOC_8_GOT_PCREL: case BFD_RELOC_16_GOT_PCREL: case BFD_RELOC_32_GOT_PCREL: case BFD_RELOC_8_GOTOFF: case BFD_RELOC_16_GOTOFF: case BFD_RELOC_32_GOTOFF: case BFD_RELOC_8_PLT_PCREL: case BFD_RELOC_16_PLT_PCREL: case BFD_RELOC_32_PLT_PCREL: case BFD_RELOC_8_PLTOFF: case BFD_RELOC_16_PLTOFF: case BFD_RELOC_32_PLTOFF: return 0; case BFD_RELOC_VTABLE_INHERIT: case BFD_RELOC_VTABLE_ENTRY: return 0; default: return 1; } } #else /* !OBJ_ELF */ #define get_reloc_code(SIZE,PCREL,OTHER) NO_RELOC #endif /* OBJ_ELF */ #ifdef BFD_ASSEMBLER arelent * tc_gen_reloc (section, fixp) asection *section; fixS *fixp; { arelent *reloc; bfd_reloc_code_real_type code; if (fixp->fx_tcbit) abort (); if (fixp->fx_r_type != BFD_RELOC_NONE) { code = fixp->fx_r_type; /* Since DIFF_EXPR_OK is defined in tc-m68k.h, it is possible that fixup_segment converted a non-PC relative reloc into a PC relative reloc. In such a case, we need to convert the reloc code. */ if (fixp->fx_pcrel) { switch (code) { case BFD_RELOC_8: code = BFD_RELOC_8_PCREL; break; case BFD_RELOC_16: code = BFD_RELOC_16_PCREL; break; case BFD_RELOC_32: code = BFD_RELOC_32_PCREL; break; case BFD_RELOC_8_PCREL: case BFD_RELOC_16_PCREL: case BFD_RELOC_32_PCREL: case BFD_RELOC_8_GOT_PCREL: case BFD_RELOC_16_GOT_PCREL: case BFD_RELOC_32_GOT_PCREL: case BFD_RELOC_8_GOTOFF: case BFD_RELOC_16_GOTOFF: case BFD_RELOC_32_GOTOFF: case BFD_RELOC_8_PLT_PCREL: case BFD_RELOC_16_PLT_PCREL: case BFD_RELOC_32_PLT_PCREL: case BFD_RELOC_8_PLTOFF: case BFD_RELOC_16_PLTOFF: case BFD_RELOC_32_PLTOFF: break; default: as_bad_where (fixp->fx_file, fixp->fx_line, _("Cannot make %s relocation PC relative"), bfd_get_reloc_code_name (code)); } } } else { #define F(SZ,PCREL) (((SZ) << 1) + (PCREL)) switch (F (fixp->fx_size, fixp->fx_pcrel)) { #define MAP(SZ,PCREL,TYPE) case F(SZ,PCREL): code = (TYPE); break MAP (1, 0, BFD_RELOC_8); MAP (2, 0, BFD_RELOC_16); MAP (4, 0, BFD_RELOC_32); MAP (1, 1, BFD_RELOC_8_PCREL); MAP (2, 1, BFD_RELOC_16_PCREL); MAP (4, 1, BFD_RELOC_32_PCREL); default: abort (); } } #undef F #undef MAP reloc = (arelent *) xmalloc (sizeof (arelent)); reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; #ifndef OBJ_ELF if (fixp->fx_pcrel) reloc->addend = fixp->fx_addnumber; else reloc->addend = 0; #else if (!fixp->fx_pcrel) reloc->addend = fixp->fx_addnumber; else reloc->addend = (section->vma + (fixp->fx_pcrel_adjust == 64 ? -1 : fixp->fx_pcrel_adjust) + fixp->fx_addnumber + md_pcrel_from (fixp)); #endif reloc->howto = bfd_reloc_type_lookup (stdoutput, code); assert (reloc->howto != 0); return reloc; } #endif /* BFD_ASSEMBLER */ /* Return zero if the reference to SYMBOL from within the same segment may be relaxed. */ #ifdef OBJ_ELF /* On an ELF system, we can't relax an externally visible symbol, because it may be overridden by a shared library. However, if TARGET_OS is "elf", then we presume that we are assembling for an embedded system, in which case we don't have to worry about shared libraries, and we can relax anything. */ #define relaxable_symbol(symbol) \ (strcmp (TARGET_OS, "elf") == 0 \ || (! S_IS_EXTERNAL (symbol) \ && ! S_IS_WEAK (symbol))) #else #define relaxable_symbol(symbol) 1 #endif /* Handle of the OPCODE hash table. NULL means any use before m68k_ip_begin() will crash. */ static struct hash_control *op_hash; /* Assemble an m68k instruction. */ static void m68k_ip (instring) char *instring; { register char *p; register struct m68k_op *opP; register const struct m68k_incant *opcode; register const char *s; register int tmpreg = 0, baseo = 0, outro = 0, nextword; char *pdot, *pdotmove; enum m68k_size siz1, siz2; char c; int losing; int opsfound; LITTLENUM_TYPE words[6]; LITTLENUM_TYPE *wordp; unsigned long ok_arch = 0; if (*instring == ' ') instring++; /* skip leading whitespace */ /* Scan up to end of operation-code, which MUST end in end-of-string or exactly 1 space. */ pdot = 0; for (p = instring; *p != '\0'; p++) { if (*p == ' ') break; if (*p == '.') pdot = p; } if (p == instring) { the_ins.error = _("No operator"); return; } /* p now points to the end of the opcode name, probably whitespace. Make sure the name is null terminated by clobbering the whitespace, look it up in the hash table, then fix it back. Remove a dot, first, since the opcode tables have none. */ if (pdot != NULL) { for (pdotmove = pdot; pdotmove < p; pdotmove++) *pdotmove = pdotmove[1]; p--; } c = *p; *p = '\0'; opcode = (const struct m68k_incant *) hash_find (op_hash, instring); *p = c; if (pdot != NULL) { for (pdotmove = p; pdotmove > pdot; pdotmove--) *pdotmove = pdotmove[-1]; *pdot = '.'; ++p; } if (opcode == NULL) { the_ins.error = _("Unknown operator"); return; } /* found a legitimate opcode, start matching operands */ while (*p == ' ') ++p; if (opcode->m_operands == 0) { char *old = input_line_pointer; *old = '\n'; input_line_pointer = p; /* Ahh - it's a motorola style psuedo op */ mote_pseudo_table[opcode->m_opnum].poc_handler (mote_pseudo_table[opcode->m_opnum].poc_val); input_line_pointer = old; *old = 0; return; } if (flag_mri && opcode->m_opnum == 0) { /* In MRI mode, random garbage is allowed after an instruction which accepts no operands. */ the_ins.args = opcode->m_operands; the_ins.numargs = opcode->m_opnum; the_ins.numo = opcode->m_codenum; the_ins.opcode[0] = getone (opcode); the_ins.opcode[1] = gettwo (opcode); return; } for (opP = &the_ins.operands[0]; *p; opP++) { p = crack_operand (p, opP); if (opP->error) { the_ins.error = opP->error; return; } } opsfound = opP - &the_ins.operands[0]; /* This ugly hack is to support the floating pt opcodes in their standard form. Essentially, we fake a first enty of type COP#1 */ if (opcode->m_operands[0] == 'I') { int n; for (n = opsfound; n > 0; --n) the_ins.operands[n] = the_ins.operands[n - 1]; memset ((char *) (&the_ins.operands[0]), '\0', sizeof (the_ins.operands[0])); the_ins.operands[0].mode = CONTROL; the_ins.operands[0].reg = m68k_float_copnum; opsfound++; } /* We've got the operands. Find an opcode that'll accept them */ for (losing = 0;;) { /* If we didn't get the right number of ops, or we have no common model with this pattern then reject this pattern. */ ok_arch |= opcode->m_arch; if (opsfound != opcode->m_opnum || ((opcode->m_arch & current_architecture) == 0)) ++losing; else { for (s = opcode->m_operands, opP = &the_ins.operands[0]; *s && !losing; s += 2, opP++) { /* Warning: this switch is huge! */ /* I've tried to organize the cases into this order: non-alpha first, then alpha by letter. Lower-case goes directly before uppercase counterpart. */ /* Code with multiple case ...: gets sorted by the lowest case ... it belongs to. I hope this makes sense. */ switch (*s) { case '!': switch (opP->mode) { case IMMED: case DREG: case AREG: case FPREG: case CONTROL: case AINC: case ADEC: case REGLST: losing++; break; default: break; } break; case '<': switch (opP->mode) { case DREG: case AREG: case FPREG: case CONTROL: case IMMED: case ADEC: case REGLST: losing++; break; default: break; } break; case '>': switch (opP->mode) { case DREG: case AREG: case FPREG: case CONTROL: case IMMED: case AINC: case REGLST: losing++; break; case ABSL: break; default: if (opP->reg == PC || opP->reg == ZPC) losing++; break; } break; case 'm': switch (opP->mode) { case DREG: case AREG: case AINDR: case AINC: case ADEC: break; default: losing++; } break; case 'n': switch (opP->mode) { case DISP: break; default: losing++; } break; case 'o': switch (opP->mode) { case BASE: case ABSL: case IMMED: break; default: losing++; } break; case 'p': switch (opP->mode) { case DREG: case AREG: case AINDR: case AINC: case ADEC: break; case DISP: if (opP->reg == PC || opP->reg == ZPC) losing++; break; default: losing++; } break; case 'q': switch (opP->mode) { case DREG: case AINDR: case AINC: case ADEC: break; case DISP: if (opP->reg == PC || opP->reg == ZPC) losing++; break; default: losing++; break; } break; case 'v': switch (opP->mode) { case DREG: case AINDR: case AINC: case ADEC: case ABSL: break; case DISP: if (opP->reg == PC || opP->reg == ZPC) losing++; break; default: losing++; break; } break; case '#': if (opP->mode != IMMED) losing++; else if (s[1] == 'b' && ! isvar (&opP->disp) && (opP->disp.exp.X_op != O_constant || ! isbyte (opP->disp.exp.X_add_number))) losing++; else if (s[1] == 'B' && ! isvar (&opP->disp) && (opP->disp.exp.X_op != O_constant || ! issbyte (opP->disp.exp.X_add_number))) losing++; else if (s[1] == 'w' && ! isvar (&opP->disp) && (opP->disp.exp.X_op != O_constant || ! isword (opP->disp.exp.X_add_number))) losing++; else if (s[1] == 'W' && ! isvar (&opP->disp) && (opP->disp.exp.X_op != O_constant || ! issword (opP->disp.exp.X_add_number))) losing++; break; case '^': case 'T': if (opP->mode != IMMED) losing++; break; case '$': if (opP->mode == AREG || opP->mode == CONTROL || opP->mode == FPREG || opP->mode == IMMED || opP->mode == REGLST || (opP->mode != ABSL && (opP->reg == PC || opP->reg == ZPC))) losing++; break; case '%': if (opP->mode == CONTROL || opP->mode == FPREG || opP->mode == REGLST || opP->mode == IMMED || (opP->mode != ABSL && (opP->reg == PC || opP->reg == ZPC))) losing++; break; case '&': switch (opP->mode) { case DREG: case AREG: case FPREG: case CONTROL: case IMMED: case AINC: case ADEC: case REGLST: losing++; break; case ABSL: break; default: if (opP->reg == PC || opP->reg == ZPC) losing++; break; } break; case '*': if (opP->mode == CONTROL || opP->mode == FPREG || opP->mode == REGLST) losing++; break; case '+': if (opP->mode != AINC) losing++; break; case '-': if (opP->mode != ADEC) losing++; break; case '/': switch (opP->mode) { case AREG: case CONTROL: case FPREG: case AINC: case ADEC: case IMMED: case REGLST: losing++; break; default: break; } break; case ';': switch (opP->mode) { case AREG: case CONTROL: case FPREG: case REGLST: losing++; break; default: break; } break; case '?': switch (opP->mode) { case AREG: case CONTROL: case FPREG: case AINC: case ADEC: case IMMED: case REGLST: losing++; break; case ABSL: break; default: if (opP->reg == PC || opP->reg == ZPC) losing++; break; } break; case '@': switch (opP->mode) { case AREG: case CONTROL: case FPREG: case IMMED: case REGLST: losing++; break; default: break; } break; case '~': /* For now! (JF FOO is this right?) */ switch (opP->mode) { case DREG: case AREG: case CONTROL: case FPREG: case IMMED: case REGLST: losing++; break; case ABSL: break; default: if (opP->reg == PC || opP->reg == ZPC) losing++; break; } break; case '3': if (opP->mode != CONTROL || (opP->reg != TT0 && opP->reg != TT1)) losing++; break; case 'A': if (opP->mode != AREG) losing++; break; case 'a': if (opP->mode != AINDR) ++losing; break; case 'B': /* FOO */ if (opP->mode != ABSL || (flag_long_jumps && strncmp (instring, "jbsr", 4) == 0)) losing++; break; case 'C': if (opP->mode != CONTROL || opP->reg != CCR) losing++; break; case 'd': if (opP->mode != DISP || opP->reg < ADDR0 || opP->reg > ADDR7) losing++; break; case 'D': if (opP->mode != DREG) losing++; break; case 'E': if (opP->reg != ACC) losing++; break; case 'F': if (opP->mode != FPREG) losing++; break; case 'G': if (opP->reg != MACSR) losing++; break; case 'H': if (opP->reg != MASK) losing++; break; case 'I': if (opP->mode != CONTROL || opP->reg < COP0 || opP->reg > COP7) losing++; break; case 'J': if (opP->mode != CONTROL || opP->reg < USP || opP->reg > last_movec_reg) losing++; else { const enum m68k_register *rp; for (rp = control_regs; *rp; rp++) if (*rp == opP->reg) break; if (*rp == 0) losing++; } break; case 'k': if (opP->mode != IMMED) losing++; break; case 'l': case 'L': if (opP->mode == DREG || opP->mode == AREG || opP->mode == FPREG) { if (s[1] == '8') losing++; else { switch (opP->mode) { case DREG: opP->mask = 1 << (opP->reg - DATA0); break; case AREG: opP->mask = 1 << (opP->reg - ADDR0 + 8); break; case FPREG: opP->mask = 1 << (opP->reg - FP0 + 16); break; default: abort (); } opP->mode = REGLST; } } else if (opP->mode == CONTROL) { if (s[1] != '8') losing++; else { switch (opP->reg) { case FPI: opP->mask = 1 << 24; break; case FPS: opP->mask = 1 << 25; break; case FPC: opP->mask = 1 << 26; break; default: losing++; break; } opP->mode = REGLST; } } else if (opP->mode != REGLST) losing++; else if (s[1] == '8' && (opP->mask & 0x0ffffff) != 0) losing++; else if (s[1] == '3' && (opP->mask & 0x7000000) != 0) losing++; break; case 'M': if (opP->mode != IMMED) losing++; else if (opP->disp.exp.X_op != O_constant || ! issbyte (opP->disp.exp.X_add_number)) losing++; else if (! m68k_quick && instring[3] != 'q' && instring[4] != 'q') losing++; break; case 'O': if (opP->mode != DREG && opP->mode != IMMED && opP->mode != ABSL) losing++; break; case 'Q': if (opP->mode != IMMED) losing++; else if (opP->disp.exp.X_op != O_constant || opP->disp.exp.X_add_number < 1 || opP->disp.exp.X_add_number > 8) losing++; else if (! m68k_quick && (strncmp (instring, "add", 3) == 0 || strncmp (instring, "sub", 3) == 0) && instring[3] != 'q') losing++; break; case 'R': if (opP->mode != DREG && opP->mode != AREG) losing++; break; case 'r': if (opP->mode != AINDR && (opP->mode != BASE || (opP->reg != 0 && opP->reg != ZADDR0) || opP->disp.exp.X_op != O_absent || ((opP->index.reg < DATA0 || opP->index.reg > DATA7) && (opP->index.reg < ADDR0 || opP->index.reg > ADDR7)) || opP->index.size != SIZE_UNSPEC || opP->index.scale != 1)) losing++; break; case 's': if (opP->mode != CONTROL || ! (opP->reg == FPI || opP->reg == FPS || opP->reg == FPC)) losing++; break; case 'S': if (opP->mode != CONTROL || opP->reg != SR) losing++; break; case 't': if (opP->mode != IMMED) losing++; else if (opP->disp.exp.X_op != O_constant || opP->disp.exp.X_add_number < 0 || opP->disp.exp.X_add_number > 7) losing++; break; case 'U': if (opP->mode != CONTROL || opP->reg != USP) losing++; break; /* JF these are out of order. We could put them in order if we were willing to put up with bunches of #ifdef m68851s in the code. Don't forget that you need these operands to use 68030 MMU instructions. */ #ifndef NO_68851 /* Memory addressing mode used by pflushr */ case '|': if (opP->mode == CONTROL || opP->mode == FPREG || opP->mode == DREG || opP->mode == AREG || opP->mode == REGLST) losing++; /* We should accept immediate operands, but they supposedly have to be quad word, and we don't handle that. I would like to see what a Motorola assembler does before doing something here. */ if (opP->mode == IMMED) losing++; break; case 'f': if (opP->mode != CONTROL || (opP->reg != SFC && opP->reg != DFC)) losing++; break; case '0': if (opP->mode != CONTROL || opP->reg != TC) losing++; break; case '1': if (opP->mode != CONTROL || opP->reg != AC) losing++; break; case '2': if (opP->mode != CONTROL || (opP->reg != CAL && opP->reg != VAL && opP->reg != SCC)) losing++; break; case 'V': if (opP->mode != CONTROL || opP->reg != VAL) losing++; break; case 'W': if (opP->mode != CONTROL || (opP->reg != DRP && opP->reg != SRP && opP->reg != CRP)) losing++; break; case 'X': if (opP->mode != CONTROL || (!(opP->reg >= BAD && opP->reg <= BAD + 7) && !(opP->reg >= BAC && opP->reg <= BAC + 7))) losing++; break; case 'Y': if (opP->mode != CONTROL || opP->reg != PSR) losing++; break; case 'Z': if (opP->mode != CONTROL || opP->reg != PCSR) losing++; break; #endif case 'c': if (opP->mode != CONTROL || (opP->reg != NC && opP->reg != IC && opP->reg != DC && opP->reg != BC)) { losing++; } /* not a cache specifier. */ break; case '_': if (opP->mode != ABSL) ++losing; break; case 'u': if (opP->reg < DATA0L || opP->reg > ADDR7U) losing++; /* FIXME: kludge instead of fixing parser: upper/lower registers are *not* CONTROL registers, but ordinary ones. */ if ((opP->reg >= DATA0L && opP->reg <= DATA7L) || (opP->reg >= DATA0U && opP->reg <= DATA7U)) opP->mode = DREG; else opP->mode = AREG; break; default: abort (); } /* switch on type of operand */ if (losing) break; } /* for each operand */ } /* if immediately wrong */ if (!losing) { break; } /* got it. */ opcode = opcode->m_next; if (!opcode) { if (ok_arch && !(ok_arch & current_architecture)) { char buf[200], *cp; strcpy (buf, _("invalid instruction for this architecture; needs ")); cp = buf + strlen (buf); switch (ok_arch) { case mfloat: strcpy (cp, _("fpu (68040, 68060 or 68881/68882)")); break; case mmmu: strcpy (cp, _("mmu (68030 or 68851)")); break; case m68020up: strcpy (cp, _("68020 or higher")); break; case m68000up: strcpy (cp, _("68000 or higher")); break; case m68010up: strcpy (cp, _("68010 or higher")); break; default: { int got_one = 0, idx; for (idx = 0; idx < (int) (sizeof (archs) / sizeof (archs[0])); idx++) { if ((archs[idx].arch & ok_arch) && ! archs[idx].alias) { if (got_one) { strcpy (cp, " or "); cp += strlen (cp); } got_one = 1; strcpy (cp, archs[idx].name); cp += strlen (cp); } } } } cp = xmalloc (strlen (buf) + 1); strcpy (cp, buf); the_ins.error = cp; } else the_ins.error = _("operands mismatch"); return; } /* Fell off the end */ losing = 0; } /* now assemble it */ the_ins.args = opcode->m_operands; the_ins.numargs = opcode->m_opnum; the_ins.numo = opcode->m_codenum; the_ins.opcode[0] = getone (opcode); the_ins.opcode[1] = gettwo (opcode); for (s = the_ins.args, opP = &the_ins.operands[0]; *s; s += 2, opP++) { /* This switch is a doozy. Watch the first step; its a big one! */ switch (s[0]) { case '*': case '~': case '%': case ';': case '@': case '!': case '&': case '$': case '?': case '/': case '<': case '>': case 'm': case 'n': case 'o': case 'p': case 'q': case 'v': #ifndef NO_68851 case '|': #endif switch (opP->mode) { case IMMED: tmpreg = 0x3c; /* 7.4 */ if (strchr ("bwl", s[1])) nextword = get_num (&opP->disp, 80); else nextword = get_num (&opP->disp, 0); if (isvar (&opP->disp)) add_fix (s[1], &opP->disp, 0, 0); switch (s[1]) { case 'b': if (!isbyte (nextword)) opP->error = _("operand out of range"); addword (nextword); baseo = 0; break; case 'w': if (!isword (nextword)) opP->error = _("operand out of range"); addword (nextword); baseo = 0; break; case 'W': if (!issword (nextword)) opP->error = _("operand out of range"); addword (nextword); baseo = 0; break; case 'l': addword (nextword >> 16); addword (nextword); baseo = 0; break; case 'f': baseo = 2; outro = 8; break; case 'F': baseo = 4; outro = 11; break; case 'x': baseo = 6; outro = 15; break; case 'p': baseo = 6; outro = -1; break; default: abort (); } if (!baseo) break; /* We gotta put out some float */ if (op (&opP->disp) != O_big) { valueT val; int gencnt; /* Can other cases happen here? */ if (op (&opP->disp) != O_constant) abort (); val = (valueT) offs (&opP->disp); gencnt = 0; do { generic_bignum[gencnt] = (LITTLENUM_TYPE) val; val >>= LITTLENUM_NUMBER_OF_BITS; ++gencnt; } while (val != 0); offs (&opP->disp) = gencnt; } if (offs (&opP->disp) > 0) { if (offs (&opP->disp) > baseo) { as_warn (_("Bignum too big for %c format; truncated"), s[1]); offs (&opP->disp) = baseo; } baseo -= offs (&opP->disp); while (baseo--) addword (0); for (wordp = generic_bignum + offs (&opP->disp) - 1; offs (&opP->disp)--; --wordp) addword (*wordp); break; } gen_to_words (words, baseo, (long) outro); for (wordp = words; baseo--; wordp++) addword (*wordp); break; case DREG: tmpreg = opP->reg - DATA; /* 0.dreg */ break; case AREG: tmpreg = 0x08 + opP->reg - ADDR; /* 1.areg */ break; case AINDR: tmpreg = 0x10 + opP->reg - ADDR; /* 2.areg */ break; case ADEC: tmpreg = 0x20 + opP->reg - ADDR; /* 4.areg */ break; case AINC: tmpreg = 0x18 + opP->reg - ADDR; /* 3.areg */ break; case DISP: nextword = get_num (&opP->disp, 80); if (opP->reg == PC && ! isvar (&opP->disp) && m68k_abspcadd) { opP->disp.exp.X_op = O_symbol; #ifndef BFD_ASSEMBLER opP->disp.exp.X_add_symbol = &abs_symbol; #else opP->disp.exp.X_add_symbol = section_symbol (absolute_section); #endif } /* Force into index mode. Hope this works */ /* We do the first bit for 32-bit displacements, and the second bit for 16 bit ones. It is possible that we should make the default be WORD instead of LONG, but I think that'd break GCC, so we put up with a little inefficiency for the sake of working output. */ if (!issword (nextword) || (isvar (&opP->disp) && ((opP->disp.size == SIZE_UNSPEC && flag_short_refs == 0 && cpu_of_arch (current_architecture) >= m68020 && ! arch_coldfire_p (current_architecture)) || opP->disp.size == SIZE_LONG))) { if (cpu_of_arch (current_architecture) < m68020 || arch_coldfire_p (current_architecture)) opP->error = _("displacement too large for this architecture; needs 68020 or higher"); if (opP->reg == PC) tmpreg = 0x3B; /* 7.3 */ else tmpreg = 0x30 + opP->reg - ADDR; /* 6.areg */ if (isvar (&opP->disp)) { if (opP->reg == PC) { if (opP->disp.size == SIZE_LONG #ifdef OBJ_ELF /* If the displacement needs pic relocation it cannot be relaxed. */ || opP->disp.pic_reloc != pic_none #endif ) { addword (0x0170); add_fix ('l', &opP->disp, 1, 2); } else { add_frag (adds (&opP->disp), offs (&opP->disp), TAB (PCLEA, SZ_UNDEF)); break; } } else { addword (0x0170); add_fix ('l', &opP->disp, 0, 0); } } else addword (0x0170); addword (nextword >> 16); } else { if (opP->reg == PC) tmpreg = 0x3A; /* 7.2 */ else tmpreg = 0x28 + opP->reg - ADDR; /* 5.areg */ if (isvar (&opP->disp)) { if (opP->reg == PC) { add_fix ('w', &opP->disp, 1, 0); } else add_fix ('w', &opP->disp, 0, 0); } } addword (nextword); break; case POST: case PRE: case BASE: nextword = 0; baseo = get_num (&opP->disp, 80); if (opP->mode == POST || opP->mode == PRE) outro = get_num (&opP->odisp, 80); /* Figure out the `addressing mode'. Also turn on the BASE_DISABLE bit, if needed. */ if (opP->reg == PC || opP->reg == ZPC) { tmpreg = 0x3b; /* 7.3 */ if (opP->reg == ZPC) nextword |= 0x80; } else if (opP->reg == 0) { nextword |= 0x80; tmpreg = 0x30; /* 6.garbage */ } else if (opP->reg >= ZADDR0 && opP->reg <= ZADDR7) { nextword |= 0x80; tmpreg = 0x30 + opP->reg - ZADDR0; } else tmpreg = 0x30 + opP->reg - ADDR; /* 6.areg */ siz1 = opP->disp.size; if (opP->mode == POST || opP->mode == PRE) siz2 = opP->odisp.size; else siz2 = SIZE_UNSPEC; /* Index register stuff */ if (opP->index.reg != 0 && opP->index.reg >= DATA && opP->index.reg <= ADDR7) { nextword |= (opP->index.reg - DATA) << 12; if (opP->index.size == SIZE_LONG || (opP->index.size == SIZE_UNSPEC && m68k_index_width_default == SIZE_LONG)) nextword |= 0x800; if ((opP->index.scale != 1 && cpu_of_arch (current_architecture) < m68020) || (opP->index.scale == 8 && arch_coldfire_p (current_architecture))) { opP->error = _("scale factor invalid on this architecture; needs cpu32 or 68020 or higher"); } if (arch_coldfire_p (current_architecture) && opP->index.size == SIZE_WORD) opP->error = _("invalid index size for coldfire"); switch (opP->index.scale) { case 1: break; case 2: nextword |= 0x200; break; case 4: nextword |= 0x400; break; case 8: nextword |= 0x600; break; default: abort (); } /* IF its simple, GET US OUT OF HERE! */ /* Must be INDEX, with an index register. Address register cannot be ZERO-PC, and either :b was forced, or we know it will fit. For a 68000 or 68010, force this mode anyways, because the larger modes aren't supported. */ if (opP->mode == BASE && ((opP->reg >= ADDR0 && opP->reg <= ADDR7) || opP->reg == PC)) { if (siz1 == SIZE_BYTE || cpu_of_arch (current_architecture) < m68020 || arch_coldfire_p (current_architecture) || (siz1 == SIZE_UNSPEC && ! isvar (&opP->disp) && issbyte (baseo))) { nextword += baseo & 0xff; addword (nextword); if (isvar (&opP->disp)) { /* Do a byte relocation. If it doesn't fit (possible on m68000) let the fixup processing complain later. */ if (opP->reg == PC) add_fix ('B', &opP->disp, 1, 1); else add_fix ('B', &opP->disp, 0, 0); } else if (siz1 != SIZE_BYTE) { if (siz1 != SIZE_UNSPEC) as_warn (_("Forcing byte displacement")); if (! issbyte (baseo)) opP->error = _("byte displacement out of range"); } break; } else if (siz1 == SIZE_UNSPEC && opP->reg == PC && isvar (&opP->disp) && subs (&opP->disp) == NULL #ifdef OBJ_ELF /* If the displacement needs pic relocation it cannot be relaxed. */ && opP->disp.pic_reloc == pic_none #endif ) { /* The code in md_convert_frag_1 needs to be able to adjust nextword. Call frag_grow to ensure that we have enough space in the frag obstack to make all the bytes contiguous. */ frag_grow (14); nextword += baseo & 0xff; addword (nextword); add_frag (adds (&opP->disp), offs (&opP->disp), TAB (PCINDEX, SZ_UNDEF)); break; } } } else { nextword |= 0x40; /* No index reg */ if (opP->index.reg >= ZDATA0 && opP->index.reg <= ZDATA7) nextword |= (opP->index.reg - ZDATA0) << 12; else if (opP->index.reg >= ZADDR0 || opP->index.reg <= ZADDR7) nextword |= (opP->index.reg - ZADDR0 + 8) << 12; } /* It isn't simple. */ if (cpu_of_arch (current_architecture) < m68020 || arch_coldfire_p (current_architecture)) opP->error = _("invalid operand mode for this architecture; needs 68020 or higher"); nextword |= 0x100; /* If the guy specified a width, we assume that it is wide enough. Maybe it isn't. If so, we lose. */ switch (siz1) { case SIZE_UNSPEC: if (isvar (&opP->disp) ? m68k_rel32 : ! issword (baseo)) { siz1 = SIZE_LONG; nextword |= 0x30; } else if (! isvar (&opP->disp) && baseo == 0) nextword |= 0x10; else { nextword |= 0x20; siz1 = SIZE_WORD; } break; case SIZE_BYTE: as_warn (_(":b not permitted; defaulting to :w")); /* Fall through. */ case SIZE_WORD: nextword |= 0x20; break; case SIZE_LONG: nextword |= 0x30; break; } /* Figure out innner displacement stuff */ if (opP->mode == POST || opP->mode == PRE) { if (cpu_of_arch (current_architecture) & cpu32) opP->error = _("invalid operand mode for this architecture; needs 68020 or higher"); switch (siz2) { case SIZE_UNSPEC: if (isvar (&opP->odisp) ? m68k_rel32 : ! issword (outro)) { siz2 = SIZE_LONG; nextword |= 0x3; } else if (! isvar (&opP->odisp) && outro == 0) nextword |= 0x1; else { nextword |= 0x2; siz2 = SIZE_WORD; } break; case 1: as_warn (_(":b not permitted; defaulting to :w")); /* Fall through. */ case 2: nextword |= 0x2; break; case 3: nextword |= 0x3; break; } if (opP->mode == POST && (nextword & 0x40) == 0) nextword |= 0x04; } addword (nextword); if (siz1 != SIZE_UNSPEC && isvar (&opP->disp)) { if (opP->reg == PC || opP->reg == ZPC) add_fix (siz1 == SIZE_LONG ? 'l' : 'w', &opP->disp, 1, 2); else add_fix (siz1 == SIZE_LONG ? 'l' : 'w', &opP->disp, 0, 0); } if (siz1 == SIZE_LONG) addword (baseo >> 16); if (siz1 != SIZE_UNSPEC) addword (baseo); if (siz2 != SIZE_UNSPEC && isvar (&opP->odisp)) add_fix (siz2 == SIZE_LONG ? 'l' : 'w', &opP->odisp, 0, 0); if (siz2 == SIZE_LONG) addword (outro >> 16); if (siz2 != SIZE_UNSPEC) addword (outro); break; case ABSL: nextword = get_num (&opP->disp, 80); switch (opP->disp.size) { default: abort (); case SIZE_UNSPEC: if (!isvar (&opP->disp) && issword (offs (&opP->disp))) { tmpreg = 0x38; /* 7.0 */ addword (nextword); break; } if (isvar (&opP->disp) && !subs (&opP->disp) && adds (&opP->disp) #ifdef OBJ_ELF /* If the displacement needs pic relocation it cannot be relaxed. */ && opP->disp.pic_reloc == pic_none #endif && S_GET_SEGMENT (adds (&opP->disp)) == now_seg && relaxable_symbol (adds (&opP->disp)) && !flag_long_jumps && !strchr ("~%&$?", s[0])) { tmpreg = 0x3A; /* 7.2 */ add_frag (adds (&opP->disp), offs (&opP->disp), TAB (PCREL, SZ_UNDEF)); break; } /* Fall through into long */ case SIZE_LONG: if (isvar (&opP->disp)) add_fix ('l', &opP->disp, 0, 0); tmpreg = 0x39;/* 7.1 mode */ addword (nextword >> 16); addword (nextword); break; case SIZE_BYTE: as_bad (_("unsupported byte value; use a different suffix")); /* Fall through. */ case SIZE_WORD: /* Word */ if (isvar (&opP->disp)) add_fix ('w', &opP->disp, 0, 0); tmpreg = 0x38;/* 7.0 mode */ addword (nextword); break; } break; case CONTROL: case FPREG: default: as_bad (_("unknown/incorrect operand")); /* abort(); */ } install_gen_operand (s[1], tmpreg); break; case '#': case '^': switch (s[1]) { /* JF: I hate floating point! */ case 'j': tmpreg = 70; break; case '8': tmpreg = 20; break; case 'C': tmpreg = 50; break; case '3': default: tmpreg = 80; break; } tmpreg = get_num (&opP->disp, tmpreg); if (isvar (&opP->disp)) add_fix (s[1], &opP->disp, 0, 0); switch (s[1]) { case 'b': /* Danger: These do no check for certain types of overflow. user beware! */ if (!isbyte (tmpreg)) opP->error = _("out of range"); insop (tmpreg, opcode); if (isvar (&opP->disp)) the_ins.reloc[the_ins.nrel - 1].n = (opcode->m_codenum) * 2 + 1; break; case 'B': if (!issbyte (tmpreg)) opP->error = _("out of range"); the_ins.opcode[the_ins.numo - 1] |= tmpreg & 0xff; if (isvar (&opP->disp)) the_ins.reloc[the_ins.nrel - 1].n = opcode->m_codenum * 2 - 1; break; case 'w': if (!isword (tmpreg)) opP->error = _("out of range"); insop (tmpreg, opcode); if (isvar (&opP->disp)) the_ins.reloc[the_ins.nrel - 1].n = (opcode->m_codenum) * 2; break; case 'W': if (!issword (tmpreg)) opP->error = _("out of range"); insop (tmpreg, opcode); if (isvar (&opP->disp)) the_ins.reloc[the_ins.nrel - 1].n = (opcode->m_codenum) * 2; break; case 'l': /* Because of the way insop works, we put these two out backwards. */ insop (tmpreg, opcode); insop (tmpreg >> 16, opcode); if (isvar (&opP->disp)) the_ins.reloc[the_ins.nrel - 1].n = (opcode->m_codenum) * 2; break; case '3': tmpreg &= 0xFF; case '8': case 'C': case 'j': install_operand (s[1], tmpreg); break; default: abort (); } break; case '+': case '-': case 'A': case 'a': install_operand (s[1], opP->reg - ADDR); break; case 'B': tmpreg = get_num (&opP->disp, 80); switch (s[1]) { case 'B': /* The pc_fix argument winds up in fx_pcrel_adjust, which is a char, and may therefore be unsigned. We want to pass -1, but we pass 64 instead, and convert back in md_pcrel_from. */ add_fix ('B', &opP->disp, 1, 64); break; case 'W': add_fix ('w', &opP->disp, 1, 0); addword (0); break; case 'L': long_branch: if (!HAVE_LONG_BRANCH(current_architecture)) as_warn (_("Can't use long branches on 68000/68010/5200")); the_ins.opcode[the_ins.numo - 1] |= 0xff; add_fix ('l', &opP->disp, 1, 0); addword (0); addword (0); break; case 'g': if (subs (&opP->disp)) /* We can't relax it */ goto long_branch; #ifdef OBJ_ELF /* If the displacement needs pic relocation it cannot be relaxed. */ if (opP->disp.pic_reloc != pic_none) goto long_branch; #endif /* This could either be a symbol, or an absolute address. No matter, the frag hacking will finger it out. Not quite: it can't switch from BRANCH to BCC68000 for the case where opnd is absolute (it needs to use the 68000 hack since no conditional abs jumps). */ if (( !HAVE_LONG_BRANCH(current_architecture) || (0 == adds (&opP->disp))) && (the_ins.opcode[0] >= 0x6200) && (the_ins.opcode[0] <= 0x6f00)) add_frag (adds (&opP->disp), offs (&opP->disp), TAB (BCC68000, SZ_UNDEF)); else add_frag (adds (&opP->disp), offs (&opP->disp), TAB (ABRANCH, SZ_UNDEF)); break; case 'w': if (isvar (&opP->disp)) { #if 1 /* check for DBcc instruction */ if ((the_ins.opcode[0] & 0xf0f8) == 0x50c8) { /* size varies if patch */ /* needed for long form */ add_frag (adds (&opP->disp), offs (&opP->disp), TAB (DBCC, SZ_UNDEF)); break; } #endif add_fix ('w', &opP->disp, 1, 0); } addword (0); break; case 'C': /* Fixed size LONG coproc branches */ add_fix ('l', &opP->disp, 1, 0); addword (0); addword (0); break; case 'c': /* Var size Coprocesssor branches */ if (subs (&opP->disp)) { add_fix ('l', &opP->disp, 1, 0); add_frag ((symbolS *) 0, (offsetT) 0, TAB (FBRANCH, LONG)); } else if (adds (&opP->disp)) add_frag (adds (&opP->disp), offs (&opP->disp), TAB (FBRANCH, SZ_UNDEF)); else { /* add_frag ((symbolS *) 0, offs (&opP->disp), TAB(FBRANCH,SHORT)); */ the_ins.opcode[the_ins.numo - 1] |= 0x40; add_fix ('l', &opP->disp, 1, 0); addword (0); addword (0); } break; default: abort (); } break; case 'C': /* Ignore it */ break; case 'd': /* JF this is a kludge */ install_operand ('s', opP->reg - ADDR); tmpreg = get_num (&opP->disp, 80); if (!issword (tmpreg)) { as_warn (_("Expression out of range, using 0")); tmpreg = 0; } addword (tmpreg); break; case 'D': install_operand (s[1], opP->reg - DATA); break; case 'E': /* Ignore it */ break; case 'F': install_operand (s[1], opP->reg - FP0); break; case 'G': /* Ignore it */ case 'H': break; case 'I': tmpreg = opP->reg - COP0; install_operand (s[1], tmpreg); break; case 'J': /* JF foo */ switch (opP->reg) { case SFC: tmpreg = 0x000; break; case DFC: tmpreg = 0x001; break; case CACR: tmpreg = 0x002; break; case TC: tmpreg = 0x003; break; case ITT0: tmpreg = 0x004; break; case ITT1: tmpreg = 0x005; break; case DTT0: tmpreg = 0x006; break; case DTT1: tmpreg = 0x007; break; case BUSCR: tmpreg = 0x008; break; case USP: tmpreg = 0x800; break; case VBR: tmpreg = 0x801; break; case CAAR: tmpreg = 0x802; break; case MSP: tmpreg = 0x803; break; case ISP: tmpreg = 0x804; break; case MMUSR: tmpreg = 0x805; break; case URP: tmpreg = 0x806; break; case SRP: tmpreg = 0x807; break; case PCR: tmpreg = 0x808; break; case ROMBAR: tmpreg = 0xC00; break; case RAMBAR0: tmpreg = 0xC04; break; case RAMBAR1: tmpreg = 0xC05; break; case MBAR: tmpreg = 0xC0F; break; default: abort (); } install_operand (s[1], tmpreg); break; case 'k': tmpreg = get_num (&opP->disp, 55); install_operand (s[1], tmpreg & 0x7f); break; case 'l': tmpreg = opP->mask; if (s[1] == 'w') { if (tmpreg & 0x7FF0000) as_bad (_("Floating point register in register list")); insop (reverse_16_bits (tmpreg), opcode); } else { if (tmpreg & 0x700FFFF) as_bad (_("Wrong register in floating-point reglist")); install_operand (s[1], reverse_8_bits (tmpreg >> 16)); } break; case 'L': tmpreg = opP->mask; if (s[1] == 'w') { if (tmpreg & 0x7FF0000) as_bad (_("Floating point register in register list")); insop (tmpreg, opcode); } else if (s[1] == '8') { if (tmpreg & 0x0FFFFFF) as_bad (_("incorrect register in reglist")); install_operand (s[1], tmpreg >> 24); } else { if (tmpreg & 0x700FFFF) as_bad (_("wrong register in floating-point reglist")); else install_operand (s[1], tmpreg >> 16); } break; case 'M': install_operand (s[1], get_num (&opP->disp, 60)); break; case 'O': tmpreg = ((opP->mode == DREG) ? 0x20 + (int) (opP->reg - DATA) : (get_num (&opP->disp, 40) & 0x1F)); install_operand (s[1], tmpreg); break; case 'Q': tmpreg = get_num (&opP->disp, 10); if (tmpreg == 8) tmpreg = 0; install_operand (s[1], tmpreg); break; case 'R': /* This depends on the fact that ADDR registers are eight more than their corresponding DATA regs, so the result will have the ADDR_REG bit set */ install_operand (s[1], opP->reg - DATA); break; case 'r': if (opP->mode == AINDR) install_operand (s[1], opP->reg - DATA); else install_operand (s[1], opP->index.reg - DATA); break; case 's': if (opP->reg == FPI) tmpreg = 0x1; else if (opP->reg == FPS) tmpreg = 0x2; else if (opP->reg == FPC) tmpreg = 0x4; else abort (); install_operand (s[1], tmpreg); break; case 'S': /* Ignore it */ break; case 'T': install_operand (s[1], get_num (&opP->disp, 30)); break; case 'U': /* Ignore it */ break; case 'c': switch (opP->reg) { case NC: tmpreg = 0; break; case DC: tmpreg = 1; break; case IC: tmpreg = 2; break; case BC: tmpreg = 3; break; default: as_fatal (_("failed sanity check")); } /* switch on cache token */ install_operand (s[1], tmpreg); break; #ifndef NO_68851 /* JF: These are out of order, I fear. */ case 'f': switch (opP->reg) { case SFC: tmpreg = 0; break; case DFC: tmpreg = 1; break; default: abort (); } install_operand (s[1], tmpreg); break; case '0': case '1': case '2': switch (opP->reg) { case TC: tmpreg = 0; break; case CAL: tmpreg = 4; break; case VAL: tmpreg = 5; break; case SCC: tmpreg = 6; break; case AC: tmpreg = 7; break; default: abort (); } install_operand (s[1], tmpreg); break; case 'V': if (opP->reg == VAL) break; abort (); case 'W': switch (opP->reg) { case DRP: tmpreg = 1; break; case SRP: tmpreg = 2; break; case CRP: tmpreg = 3; break; default: abort (); } install_operand (s[1], tmpreg); break; case 'X': switch (opP->reg) { case BAD: case BAD + 1: case BAD + 2: case BAD + 3: case BAD + 4: case BAD + 5: case BAD + 6: case BAD + 7: tmpreg = (4 << 10) | ((opP->reg - BAD) << 2); break; case BAC: case BAC + 1: case BAC + 2: case BAC + 3: case BAC + 4: case BAC + 5: case BAC + 6: case BAC + 7: tmpreg = (5 << 10) | ((opP->reg - BAC) << 2); break; default: abort (); } install_operand (s[1], tmpreg); break; case 'Y': know (opP->reg == PSR); break; case 'Z': know (opP->reg == PCSR); break; #endif /* m68851 */ case '3': switch (opP->reg) { case TT0: tmpreg = 2; break; case TT1: tmpreg = 3; break; default: abort (); } install_operand (s[1], tmpreg); break; case 't': tmpreg = get_num (&opP->disp, 20); install_operand (s[1], tmpreg); break; case '_': /* used only for move16 absolute 32-bit address */ if (isvar (&opP->disp)) add_fix ('l', &opP->disp, 0, 0); tmpreg = get_num (&opP->disp, 80); addword (tmpreg >> 16); addword (tmpreg & 0xFFFF); break; case 'u': install_operand (s[1], opP->reg - DATA0L); opP->reg -= (DATA0L); opP->reg &= 0x0F; /* remove upper/lower bit */ break; default: abort (); } } /* By the time whe get here (FINALLY) the_ins contains the complete instruction, ready to be emitted. . . */ } static int reverse_16_bits (in) int in; { int out = 0; int n; static int mask[16] = { 0x0001, 0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080, 0x0100, 0x0200, 0x0400, 0x0800, 0x1000, 0x2000, 0x4000, 0x8000 }; for (n = 0; n < 16; n++) { if (in & mask[n]) out |= mask[15 - n]; } return out; } /* reverse_16_bits() */ static int reverse_8_bits (in) int in; { int out = 0; int n; static int mask[8] = { 0x0001, 0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080, }; for (n = 0; n < 8; n++) { if (in & mask[n]) out |= mask[7 - n]; } return out; } /* reverse_8_bits() */ /* Cause an extra frag to be generated here, inserting up to 10 bytes (that value is chosen in the frag_var call in md_assemble). TYPE is the subtype of the frag to be generated; its primary type is rs_machine_dependent. The TYPE parameter is also used by md_convert_frag_1 and md_estimate_size_before_relax. The appropriate type of fixup will be emitted by md_convert_frag_1. ADD becomes the FR_SYMBOL field of the frag, and OFF the FR_OFFSET. */ static void install_operand (mode, val) int mode; int val; { switch (mode) { case 's': the_ins.opcode[0] |= val & 0xFF; /* JF FF is for M kludge */ break; case 'd': the_ins.opcode[0] |= val << 9; break; case '1': the_ins.opcode[1] |= val << 12; break; case '2': the_ins.opcode[1] |= val << 6; break; case '3': the_ins.opcode[1] |= val; break; case '4': the_ins.opcode[2] |= val << 12; break; case '5': the_ins.opcode[2] |= val << 6; break; case '6': /* DANGER! This is a hack to force cas2l and cas2w cmds to be three words long! */ the_ins.numo++; the_ins.opcode[2] |= val; break; case '7': the_ins.opcode[1] |= val << 7; break; case '8': the_ins.opcode[1] |= val << 10; break; #ifndef NO_68851 case '9': the_ins.opcode[1] |= val << 5; break; #endif case 't': the_ins.opcode[1] |= (val << 10) | (val << 7); break; case 'D': the_ins.opcode[1] |= (val << 12) | val; break; case 'g': the_ins.opcode[0] |= val = 0xff; break; case 'i': the_ins.opcode[0] |= val << 9; break; case 'C': the_ins.opcode[1] |= val; break; case 'j': the_ins.opcode[1] |= val; the_ins.numo++; /* What a hack */ break; case 'k': the_ins.opcode[1] |= val << 4; break; case 'b': case 'w': case 'W': case 'l': break; case 'e': the_ins.opcode[0] |= (val << 6); break; case 'L': the_ins.opcode[1] = (val >> 16); the_ins.opcode[2] = val & 0xffff; break; case 'm': the_ins.opcode[0] |= ((val & 0x8) << (6 - 3)); the_ins.opcode[0] |= ((val & 0x7) << 9); the_ins.opcode[1] |= ((val & 0x10) << (7 - 4)); break; case 'n': the_ins.opcode[0] |= ((val & 0x8) << (6 - 3)); the_ins.opcode[0] |= ((val & 0x7) << 9); break; case 'o': the_ins.opcode[1] |= val << 12; the_ins.opcode[1] |= ((val & 0x10) << (7 - 4)); break; case 'M': the_ins.opcode[0] |= (val & 0xF); the_ins.opcode[1] |= ((val & 0x10) << (6 - 4)); break; case 'N': the_ins.opcode[1] |= (val & 0xF); the_ins.opcode[1] |= ((val & 0x10) << (6 - 4)); break; case 'h': the_ins.opcode[1] |= ((val != 1) << 10); break; case 'c': default: as_fatal (_("failed sanity check.")); } } /* install_operand() */ static void install_gen_operand (mode, val) int mode; int val; { switch (mode) { case 's': the_ins.opcode[0] |= val; break; case 'd': /* This is a kludge!!! */ the_ins.opcode[0] |= (val & 0x07) << 9 | (val & 0x38) << 3; break; case 'b': case 'w': case 'l': case 'f': case 'F': case 'x': case 'p': the_ins.opcode[0] |= val; break; /* more stuff goes here */ default: as_fatal (_("failed sanity check.")); } } /* install_gen_operand() */ /* * verify that we have some number of paren pairs, do m68k_ip_op(), and * then deal with the bitfield hack. */ static char * crack_operand (str, opP) register char *str; register struct m68k_op *opP; { register int parens; register int c; register char *beg_str; int inquote = 0; if (!str) { return str; } beg_str = str; for (parens = 0; *str && (parens > 0 || inquote || notend (str)); str++) { if (! inquote) { if (*str == '(') parens++; else if (*str == ')') { if (!parens) { /* ERROR */ opP->error = _("Extra )"); return str; } --parens; } } if (flag_mri && *str == '\'') inquote = ! inquote; } if (!*str && parens) { /* ERROR */ opP->error = _("Missing )"); return str; } c = *str; *str = '\0'; if (m68k_ip_op (beg_str, opP) != 0) { *str = c; return str; } *str = c; if (c == '}') c = *++str; /* JF bitfield hack */ if (c) { c = *++str; if (!c) as_bad (_("Missing operand")); } /* Detect MRI REG symbols and convert them to REGLSTs. */ if (opP->mode == CONTROL && (int)opP->reg < 0) { opP->mode = REGLST; opP->mask = ~(int)opP->reg; opP->reg = 0; } return str; } /* This is the guts of the machine-dependent assembler. STR points to a machine dependent instruction. This function is supposed to emit the frags/bytes it assembles to. */ static void insert_reg (regname, regnum) const char *regname; int regnum; { char buf[100]; int i; #ifdef REGISTER_PREFIX if (!flag_reg_prefix_optional) { buf[0] = REGISTER_PREFIX; strcpy (buf + 1, regname); regname = buf; } #endif symbol_table_insert (symbol_new (regname, reg_section, regnum, &zero_address_frag)); for (i = 0; regname[i]; i++) buf[i] = islower (regname[i]) ? toupper (regname[i]) : regname[i]; buf[i] = '\0'; symbol_table_insert (symbol_new (buf, reg_section, regnum, &zero_address_frag)); } struct init_entry { const char *name; int number; }; static const struct init_entry init_table[] = { { "d0", DATA0 }, { "d1", DATA1 }, { "d2", DATA2 }, { "d3", DATA3 }, { "d4", DATA4 }, { "d5", DATA5 }, { "d6", DATA6 }, { "d7", DATA7 }, { "a0", ADDR0 }, { "a1", ADDR1 }, { "a2", ADDR2 }, { "a3", ADDR3 }, { "a4", ADDR4 }, { "a5", ADDR5 }, { "a6", ADDR6 }, { "fp", ADDR6 }, { "a7", ADDR7 }, { "sp", ADDR7 }, { "ssp", ADDR7 }, { "fp0", FP0 }, { "fp1", FP1 }, { "fp2", FP2 }, { "fp3", FP3 }, { "fp4", FP4 }, { "fp5", FP5 }, { "fp6", FP6 }, { "fp7", FP7 }, { "fpi", FPI }, { "fpiar", FPI }, { "fpc", FPI }, { "fps", FPS }, { "fpsr", FPS }, { "fpc", FPC }, { "fpcr", FPC }, { "control", FPC }, { "status", FPS }, { "iaddr", FPI }, { "cop0", COP0 }, { "cop1", COP1 }, { "cop2", COP2 }, { "cop3", COP3 }, { "cop4", COP4 }, { "cop5", COP5 }, { "cop6", COP6 }, { "cop7", COP7 }, { "pc", PC }, { "zpc", ZPC }, { "sr", SR }, { "ccr", CCR }, { "cc", CCR }, { "acc", ACC }, { "macsr", MACSR }, { "mask", MASK }, /* control registers */ { "sfc", SFC }, /* Source Function Code */ { "sfcr", SFC }, { "dfc", DFC }, /* Destination Function Code */ { "dfcr", DFC }, { "cacr", CACR }, /* Cache Control Register */ { "caar", CAAR }, /* Cache Address Register */ { "usp", USP }, /* User Stack Pointer */ { "vbr", VBR }, /* Vector Base Register */ { "msp", MSP }, /* Master Stack Pointer */ { "isp", ISP }, /* Interrupt Stack Pointer */ { "itt0", ITT0 }, /* Instruction Transparent Translation Reg 0 */ { "itt1", ITT1 }, /* Instruction Transparent Translation Reg 1 */ { "dtt0", DTT0 }, /* Data Transparent Translation Register 0 */ { "dtt1", DTT1 }, /* Data Transparent Translation Register 1 */ /* 68ec040 versions of same */ { "iacr0", ITT0 }, /* Instruction Access Control Register 0 */ { "iacr1", ITT1 }, /* Instruction Access Control Register 0 */ { "dacr0", DTT0 }, /* Data Access Control Register 0 */ { "dacr1", DTT1 }, /* Data Access Control Register 0 */ /* mcf5200 versions of same. The ColdFire programmer's reference manual indicated that the order is 2,3,0,1, but Ken Rose says that 0,1,2,3 is the correct order. */ { "acr0", ITT0 }, /* Access Control Unit 0 */ { "acr1", ITT1 }, /* Access Control Unit 1 */ { "acr2", DTT0 }, /* Access Control Unit 2 */ { "acr3", DTT1 }, /* Access Control Unit 3 */ { "tc", TC }, /* MMU Translation Control Register */ { "tcr", TC }, { "mmusr", MMUSR }, /* MMU Status Register */ { "srp", SRP }, /* User Root Pointer */ { "urp", URP }, /* Supervisor Root Pointer */ { "buscr", BUSCR }, { "pcr", PCR }, { "rombar", ROMBAR }, /* ROM Base Address Register */ { "rambar0", RAMBAR0 }, /* ROM Base Address Register */ { "rambar1", RAMBAR1 }, /* ROM Base Address Register */ { "mbar", MBAR }, /* Module Base Address Register */ /* end of control registers */ { "ac", AC }, { "bc", BC }, { "cal", CAL }, { "crp", CRP }, { "drp", DRP }, { "pcsr", PCSR }, { "psr", PSR }, { "scc", SCC }, { "val", VAL }, { "bad0", BAD0 }, { "bad1", BAD1 }, { "bad2", BAD2 }, { "bad3", BAD3 }, { "bad4", BAD4 }, { "bad5", BAD5 }, { "bad6", BAD6 }, { "bad7", BAD7 }, { "bac0", BAC0 }, { "bac1", BAC1 }, { "bac2", BAC2 }, { "bac3", BAC3 }, { "bac4", BAC4 }, { "bac5", BAC5 }, { "bac6", BAC6 }, { "bac7", BAC7 }, { "ic", IC }, { "dc", DC }, { "nc", NC }, { "tt0", TT0 }, { "tt1", TT1 }, /* 68ec030 versions of same */ { "ac0", TT0 }, { "ac1", TT1 }, /* 68ec030 access control unit, identical to 030 MMU status reg */ { "acusr", PSR }, /* Suppressed data and address registers. */ { "zd0", ZDATA0 }, { "zd1", ZDATA1 }, { "zd2", ZDATA2 }, { "zd3", ZDATA3 }, { "zd4", ZDATA4 }, { "zd5", ZDATA5 }, { "zd6", ZDATA6 }, { "zd7", ZDATA7 }, { "za0", ZADDR0 }, { "za1", ZADDR1 }, { "za2", ZADDR2 }, { "za3", ZADDR3 }, { "za4", ZADDR4 }, { "za5", ZADDR5 }, { "za6", ZADDR6 }, { "za7", ZADDR7 }, /* Upper and lower data and address registers, used by macw and msacw. */ { "d0l", DATA0L }, { "d1l", DATA1L }, { "d2l", DATA2L }, { "d3l", DATA3L }, { "d4l", DATA4L }, { "d5l", DATA5L }, { "d6l", DATA6L }, { "d7l", DATA7L }, { "a0l", ADDR0L }, { "a1l", ADDR1L }, { "a2l", ADDR2L }, { "a3l", ADDR3L }, { "a4l", ADDR4L }, { "a5l", ADDR5L }, { "a6l", ADDR6L }, { "a7l", ADDR7L }, { "d0u", DATA0U }, { "d1u", DATA1U }, { "d2u", DATA2U }, { "d3u", DATA3U }, { "d4u", DATA4U }, { "d5u", DATA5U }, { "d6u", DATA6U }, { "d7u", DATA7U }, { "a0u", ADDR0U }, { "a1u", ADDR1U }, { "a2u", ADDR2U }, { "a3u", ADDR3U }, { "a4u", ADDR4U }, { "a5u", ADDR5U }, { "a6u", ADDR6U }, { "a7u", ADDR7U }, { 0, 0 } }; static void init_regtable () { int i; for (i = 0; init_table[i].name; i++) insert_reg (init_table[i].name, init_table[i].number); } static int no_68851, no_68881; #ifdef OBJ_AOUT /* a.out machine type. Default to 68020. */ int m68k_aout_machtype = 2; #endif void md_assemble (str) char *str; { const char *er; short *fromP; char *toP = NULL; int m, n = 0; char *to_beg_P; int shorts_this_frag; fixS *fixP; /* In MRI mode, the instruction and operands are separated by a space. Anything following the operands is a comment. The label has already been removed. */ if (flag_mri) { char *s; int fields = 0; int infield = 0; int inquote = 0; for (s = str; *s != '\0'; s++) { if ((*s == ' ' || *s == '\t') && ! inquote) { if (infield) { ++fields; if (fields >= 2) { *s = '\0'; break; } infield = 0; } } else { if (! infield) infield = 1; if (*s == '\'') inquote = ! inquote; } } } memset ((char *) (&the_ins), '\0', sizeof (the_ins)); m68k_ip (str); er = the_ins.error; if (!er) { for (n = 0; n < the_ins.numargs; n++) if (the_ins.operands[n].error) { er = the_ins.operands[n].error; break; } } if (er) { as_bad (_("%s -- statement `%s' ignored"), er, str); return; } /* If there is a current label, record that it marks an instruction. */ if (current_label != NULL) { current_label->text = 1; current_label = NULL; } if (the_ins.nfrag == 0) { /* No frag hacking involved; just put it out */ toP = frag_more (2 * the_ins.numo); fromP = &the_ins.opcode[0]; for (m = the_ins.numo; m; --m) { md_number_to_chars (toP, (long) (*fromP), 2); toP += 2; fromP++; } /* put out symbol-dependent info */ for (m = 0; m < the_ins.nrel; m++) { switch (the_ins.reloc[m].wid) { case 'B': n = 1; break; case 'b': n = 1; break; case '3': n = 1; break; case 'w': case 'W': n = 2; break; case 'l': n = 4; break; default: as_fatal (_("Don't know how to figure width of %c in md_assemble()"), the_ins.reloc[m].wid); } fixP = fix_new_exp (frag_now, ((toP - frag_now->fr_literal) - the_ins.numo * 2 + the_ins.reloc[m].n), n, &the_ins.reloc[m].exp, the_ins.reloc[m].pcrel, get_reloc_code (n, the_ins.reloc[m].pcrel, the_ins.reloc[m].pic_reloc)); fixP->fx_pcrel_adjust = the_ins.reloc[m].pcrel_fix; if (the_ins.reloc[m].wid == 'B') fixP->fx_signed = 1; } return; } /* There's some frag hacking */ for (n = 0, fromP = &the_ins.opcode[0]; n < the_ins.nfrag; n++) { int wid; if (n == 0) wid = 2 * the_ins.fragb[n].fragoff; else wid = 2 * (the_ins.numo - the_ins.fragb[n - 1].fragoff); toP = frag_more (wid); to_beg_P = toP; shorts_this_frag = 0; for (m = wid / 2; m; --m) { md_number_to_chars (toP, (long) (*fromP), 2); toP += 2; fromP++; shorts_this_frag++; } for (m = 0; m < the_ins.nrel; m++) { if ((the_ins.reloc[m].n) >= 2 * shorts_this_frag) { the_ins.reloc[m].n -= 2 * shorts_this_frag; break; } wid = the_ins.reloc[m].wid; if (wid == 0) continue; the_ins.reloc[m].wid = 0; wid = (wid == 'b') ? 1 : (wid == 'w') ? 2 : (wid == 'l') ? 4 : 4000; fixP = fix_new_exp (frag_now, ((toP - frag_now->fr_literal) - the_ins.numo * 2 + the_ins.reloc[m].n), wid, &the_ins.reloc[m].exp, the_ins.reloc[m].pcrel, get_reloc_code (wid, the_ins.reloc[m].pcrel, the_ins.reloc[m].pic_reloc)); fixP->fx_pcrel_adjust = the_ins.reloc[m].pcrel_fix; } (void) frag_var (rs_machine_dependent, 10, 0, (relax_substateT) (the_ins.fragb[n].fragty), the_ins.fragb[n].fadd, the_ins.fragb[n].foff, to_beg_P); } n = (the_ins.numo - the_ins.fragb[n - 1].fragoff); shorts_this_frag = 0; if (n) { toP = frag_more (n * sizeof (short)); while (n--) { md_number_to_chars (toP, (long) (*fromP), 2); toP += 2; fromP++; shorts_this_frag++; } } for (m = 0; m < the_ins.nrel; m++) { int wid; wid = the_ins.reloc[m].wid; if (wid == 0) continue; the_ins.reloc[m].wid = 0; wid = (wid == 'b') ? 1 : (wid == 'w') ? 2 : (wid == 'l') ? 4 : 4000; fixP = fix_new_exp (frag_now, ((the_ins.reloc[m].n + toP - frag_now->fr_literal) - shorts_this_frag * 2), wid, &the_ins.reloc[m].exp, the_ins.reloc[m].pcrel, get_reloc_code (wid, the_ins.reloc[m].pcrel, the_ins.reloc[m].pic_reloc)); fixP->fx_pcrel_adjust = the_ins.reloc[m].pcrel_fix; } } void md_begin () { /* * md_begin -- set up hash tables with 68000 instructions. * similar to what the vax assembler does. ---phr */ /* RMS claims the thing to do is take the m68k-opcode.h table, and make a copy of it at runtime, adding in the information we want but isn't there. I think it'd be better to have an awk script hack the table at compile time. Or even just xstr the table and use it as-is. But my lord ghod hath spoken, so we do it this way. Excuse the ugly var names. */ register const struct m68k_opcode *ins; register struct m68k_incant *hack, *slak; register const char *retval = 0; /* empty string, or error msg text */ register int i; register char c; if (flag_mri) { flag_reg_prefix_optional = 1; m68k_abspcadd = 1; if (! m68k_rel32_from_cmdline) m68k_rel32 = 0; } op_hash = hash_new (); obstack_begin (&robyn, 4000); for (i = 0; i < m68k_numopcodes; i++) { hack = slak = (struct m68k_incant *) obstack_alloc (&robyn, sizeof (struct m68k_incant)); do { ins = &m68k_opcodes[i]; /* We *could* ignore insns that don't match our arch here but just leaving them out of the hash. */ slak->m_operands = ins->args; slak->m_opnum = strlen (slak->m_operands) / 2; slak->m_arch = ins->arch; slak->m_opcode = ins->opcode; /* This is kludgey */ slak->m_codenum = ((ins->match) & 0xffffL) ? 2 : 1; if (i + 1 != m68k_numopcodes && !strcmp (ins->name, m68k_opcodes[i + 1].name)) { slak->m_next = (struct m68k_incant *) obstack_alloc (&robyn, sizeof (struct m68k_incant)); i++; } else slak->m_next = 0; slak = slak->m_next; } while (slak); retval = hash_insert (op_hash, ins->name, (char *) hack); if (retval) as_fatal (_("Internal Error: Can't hash %s: %s"), ins->name, retval); } for (i = 0; i < m68k_numaliases; i++) { const char *name = m68k_opcode_aliases[i].primary; const char *alias = m68k_opcode_aliases[i].alias; PTR val = hash_find (op_hash, name); if (!val) as_fatal (_("Internal Error: Can't find %s in hash table"), name); retval = hash_insert (op_hash, alias, val); if (retval) as_fatal (_("Internal Error: Can't hash %s: %s"), alias, retval); } /* In MRI mode, all unsized branches are variable sized. Normally, they are word sized. */ if (flag_mri) { static struct m68k_opcode_alias mri_aliases[] = { { "bhi", "jhi", }, { "bls", "jls", }, { "bcc", "jcc", }, { "bcs", "jcs", }, { "bne", "jne", }, { "beq", "jeq", }, { "bvc", "jvc", }, { "bvs", "jvs", }, { "bpl", "jpl", }, { "bmi", "jmi", }, { "bge", "jge", }, { "blt", "jlt", }, { "bgt", "jgt", }, { "ble", "jle", }, { "bra", "jra", }, { "bsr", "jbsr", }, }; for (i = 0; i < (int) (sizeof mri_aliases / sizeof mri_aliases[0]); i++) { const char *name = mri_aliases[i].primary; const char *alias = mri_aliases[i].alias; PTR val = hash_find (op_hash, name); if (!val) as_fatal (_("Internal Error: Can't find %s in hash table"), name); retval = hash_jam (op_hash, alias, val); if (retval) as_fatal (_("Internal Error: Can't hash %s: %s"), alias, retval); } } for (i = 0; i < (int) sizeof (mklower_table); i++) mklower_table[i] = (isupper (c = (char) i)) ? tolower (c) : c; for (i = 0; i < (int) sizeof (notend_table); i++) { notend_table[i] = 0; alt_notend_table[i] = 0; } notend_table[','] = 1; notend_table['{'] = 1; notend_table['}'] = 1; alt_notend_table['a'] = 1; alt_notend_table['A'] = 1; alt_notend_table['d'] = 1; alt_notend_table['D'] = 1; alt_notend_table['#'] = 1; alt_notend_table['&'] = 1; alt_notend_table['f'] = 1; alt_notend_table['F'] = 1; #ifdef REGISTER_PREFIX alt_notend_table[REGISTER_PREFIX] = 1; #endif /* We need to put '(' in alt_notend_table to handle cas2 %d0:%d2,%d3:%d4,(%a0):(%a1) */ alt_notend_table['('] = 1; /* We need to put '@' in alt_notend_table to handle cas2 %d0:%d2,%d3:%d4,@(%d0):@(%d1) */ alt_notend_table['@'] = 1; /* We need to put digits in alt_notend_table to handle bfextu %d0{24:1},%d0 */ alt_notend_table['0'] = 1; alt_notend_table['1'] = 1; alt_notend_table['2'] = 1; alt_notend_table['3'] = 1; alt_notend_table['4'] = 1; alt_notend_table['5'] = 1; alt_notend_table['6'] = 1; alt_notend_table['7'] = 1; alt_notend_table['8'] = 1; alt_notend_table['9'] = 1; #ifndef MIT_SYNTAX_ONLY /* Insert pseudo ops, these have to go into the opcode table since gas expects pseudo ops to start with a dot */ { int n = 0; while (mote_pseudo_table[n].poc_name) { hack = (struct m68k_incant *) obstack_alloc (&robyn, sizeof (struct m68k_incant)); hash_insert (op_hash, mote_pseudo_table[n].poc_name, (char *) hack); hack->m_operands = 0; hack->m_opnum = n; n++; } } #endif init_regtable (); #ifdef OBJ_ELF record_alignment (text_section, 2); record_alignment (data_section, 2); record_alignment (bss_section, 2); #endif } static void select_control_regs () { /* Note which set of "movec" control registers is available. */ switch (cpu_of_arch (current_architecture)) { case m68000: control_regs = m68000_control_regs; break; case m68010: control_regs = m68010_control_regs; break; case m68020: case m68030: control_regs = m68020_control_regs; break; case m68040: control_regs = m68040_control_regs; break; case m68060: control_regs = m68060_control_regs; break; case cpu32: control_regs = cpu32_control_regs; break; case mcf5200: case mcf5206e: case mcf5307: control_regs = mcf_control_regs; break; default: abort (); } } void m68k_init_after_args () { if (cpu_of_arch (current_architecture) == 0) { int i; const char *default_cpu = TARGET_CPU; if (*default_cpu == 'm') default_cpu++; for (i = 0; i < n_archs; i++) if (strcasecmp (default_cpu, archs[i].name) == 0) break; if (i == n_archs) { as_bad (_("unrecognized default cpu `%s' ???"), TARGET_CPU); current_architecture |= m68020; } else current_architecture |= archs[i].arch; } /* Permit m68881 specification with all cpus; those that can't work with a coprocessor could be doing emulation. */ if (current_architecture & m68851) { if (current_architecture & m68040) { as_warn (_("68040 and 68851 specified; mmu instructions may assemble incorrectly")); } } /* What other incompatibilities could we check for? */ /* Toss in some default assumptions about coprocessors. */ if (!no_68881 && (cpu_of_arch (current_architecture) /* Can CPU32 have a 68881 coprocessor?? */ & (m68020 | m68030 | cpu32))) { current_architecture |= m68881; } if (!no_68851 && (cpu_of_arch (current_architecture) & m68020up) != 0 && (cpu_of_arch (current_architecture) & m68040up) == 0) { current_architecture |= m68851; } if (no_68881 && (current_architecture & m68881)) as_bad (_("options for 68881 and no-68881 both given")); if (no_68851 && (current_architecture & m68851)) as_bad (_("options for 68851 and no-68851 both given")); #ifdef OBJ_AOUT /* Work out the magic number. This isn't very general. */ if (current_architecture & m68000) m68k_aout_machtype = 0; else if (current_architecture & m68010) m68k_aout_machtype = 1; else if (current_architecture & m68020) m68k_aout_machtype = 2; else m68k_aout_machtype = 2; #endif /* Note which set of "movec" control registers is available. */ select_control_regs (); if (cpu_of_arch (current_architecture) < m68020 || arch_coldfire_p (current_architecture)) md_relax_table[TAB (PCINDEX, BYTE)].rlx_more = 0; } /* This is called when a label is defined. */ void m68k_frob_label (sym) symbolS *sym; { struct label_line *n; n = (struct label_line *) xmalloc (sizeof *n); n->next = labels; n->label = sym; as_where (&n->file, &n->line); n->text = 0; labels = n; current_label = n; } /* This is called when a value that is not an instruction is emitted. */ void m68k_flush_pending_output () { current_label = NULL; } /* This is called at the end of the assembly, when the final value of the label is known. We warn if this is a text symbol aligned at an odd location. */ void m68k_frob_symbol (sym) symbolS *sym; { if (S_GET_SEGMENT (sym) == reg_section && (int) S_GET_VALUE (sym) < 0) { S_SET_SEGMENT (sym, absolute_section); S_SET_VALUE (sym, ~(int)S_GET_VALUE (sym)); } else if ((S_GET_VALUE (sym) & 1) != 0) { struct label_line *l; for (l = labels; l != NULL; l = l->next) { if (l->label == sym) { if (l->text) as_warn_where (l->file, l->line, _("text label `%s' aligned to odd boundary"), S_GET_NAME (sym)); break; } } } } /* This is called if we go in or out of MRI mode because of the .mri pseudo-op. */ void m68k_mri_mode_change (on) int on; { if (on) { if (! flag_reg_prefix_optional) { flag_reg_prefix_optional = 1; #ifdef REGISTER_PREFIX init_regtable (); #endif } m68k_abspcadd = 1; if (! m68k_rel32_from_cmdline) m68k_rel32 = 0; } else { if (! reg_prefix_optional_seen) { #ifdef REGISTER_PREFIX_OPTIONAL flag_reg_prefix_optional = REGISTER_PREFIX_OPTIONAL; #else flag_reg_prefix_optional = 0; #endif #ifdef REGISTER_PREFIX init_regtable (); #endif } m68k_abspcadd = 0; if (! m68k_rel32_from_cmdline) m68k_rel32 = 1; } } /* Equal to MAX_PRECISION in atof-ieee.c */ #define MAX_LITTLENUMS 6 /* Turn a string in input_line_pointer into a floating point constant of type type, and store the appropriate bytes in *litP. The number of LITTLENUMS emitted is stored in *sizeP . An error message is returned, or NULL on OK. */ char * md_atof (type, litP, sizeP) char type; char *litP; int *sizeP; { int prec; LITTLENUM_TYPE words[MAX_LITTLENUMS]; LITTLENUM_TYPE *wordP; char *t; switch (type) { case 'f': case 'F': case 's': case 'S': prec = 2; break; case 'd': case 'D': case 'r': case 'R': prec = 4; break; case 'x': case 'X': prec = 6; break; case 'p': case 'P': prec = 6; break; default: *sizeP = 0; return _("Bad call to MD_ATOF()"); } t = atof_ieee (input_line_pointer, type, words); if (t) input_line_pointer = t; *sizeP = prec * sizeof (LITTLENUM_TYPE); for (wordP = words; prec--;) { md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE)); litP += sizeof (LITTLENUM_TYPE); } return 0; } void md_number_to_chars (buf, val, n) char *buf; valueT val; int n; { number_to_chars_bigendian (buf, val, n); } static void md_apply_fix_2 (fixP, val) fixS *fixP; offsetT val; { addressT upper_limit; offsetT lower_limit; /* This is unnecessary but it convinces the native rs6000 compiler to generate the code we want. */ char *buf = fixP->fx_frag->fr_literal; buf += fixP->fx_where; /* end ibm compiler workaround */ if (val & 0x80000000) val |= ~(addressT)0x7fffffff; else val &= 0x7fffffff; #ifdef OBJ_ELF if (fixP->fx_addsy) { memset (buf, 0, fixP->fx_size); fixP->fx_addnumber = val; /* Remember value for emit_reloc */ if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT && !S_IS_DEFINED (fixP->fx_addsy) && !S_IS_WEAK (fixP->fx_addsy)) S_SET_WEAK (fixP->fx_addsy); return; } #endif #ifdef BFD_ASSEMBLER if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) return; #endif switch (fixP->fx_size) { /* The cast to offsetT below are necessary to make code correct for machines where ints are smaller than offsetT */ case 1: *buf++ = val; upper_limit = 0x7f; lower_limit = - (offsetT) 0x80; break; case 2: *buf++ = (val >> 8); *buf++ = val; upper_limit = 0x7fff; lower_limit = - (offsetT) 0x8000; break; case 4: *buf++ = (val >> 24); *buf++ = (val >> 16); *buf++ = (val >> 8); *buf++ = val; upper_limit = 0x7fffffff; lower_limit = - (offsetT) 0x7fffffff - 1; /* avoid constant overflow */ break; default: BAD_CASE (fixP->fx_size); } /* Fix up a negative reloc. */ if (fixP->fx_addsy == NULL && fixP->fx_subsy != NULL) { fixP->fx_addsy = fixP->fx_subsy; fixP->fx_subsy = NULL; fixP->fx_tcbit = 1; } /* For non-pc-relative values, it's conceivable we might get something like "0xff" for a byte field. So extend the upper part of the range to accept such numbers. We arbitrarily disallow "-0xff" or "0xff+0xff", so that we can do any range checking at all. */ if (! fixP->fx_pcrel && ! fixP->fx_signed) upper_limit = upper_limit * 2 + 1; if ((addressT) val > upper_limit && (val > 0 || val < lower_limit)) as_bad_where (fixP->fx_file, fixP->fx_line, _("value out of range")); /* A one byte PC-relative reloc means a short branch. We can't use a short branch with a value of 0 or -1, because those indicate different opcodes (branches with longer offsets). fixup_segment in write.c may have clobbered fx_pcrel, so we need to examine the reloc type. */ if ((fixP->fx_pcrel #ifdef BFD_ASSEMBLER || fixP->fx_r_type == BFD_RELOC_8_PCREL #endif ) && fixP->fx_size == 1 && (fixP->fx_addsy == NULL || S_IS_DEFINED (fixP->fx_addsy)) && (val == 0 || val == -1)) as_bad_where (fixP->fx_file, fixP->fx_line, _("invalid byte branch offset")); } #ifdef BFD_ASSEMBLER int md_apply_fix (fixP, valp) fixS *fixP; valueT *valp; { md_apply_fix_2 (fixP, (addressT) *valp); return 1; } #else void md_apply_fix (fixP, val) fixS *fixP; long val; { md_apply_fix_2 (fixP, (addressT) val); } #endif /* *fragP has been relaxed to its final size, and now needs to have the bytes inside it modified to conform to the new size There is UGLY MAGIC here. .. */ static void md_convert_frag_1 (fragP) register fragS *fragP; { long disp; long ext = 0; fixS *fixP; /* Address in object code of the displacement. */ register int object_address = fragP->fr_fix + fragP->fr_address; /* Address in gas core of the place to store the displacement. */ /* This convinces the native rs6000 compiler to generate the code we want. */ register char *buffer_address = fragP->fr_literal; buffer_address += fragP->fr_fix; /* end ibm compiler workaround */ /* The displacement of the address, from current location. */ disp = fragP->fr_symbol ? S_GET_VALUE (fragP->fr_symbol) : 0; disp = (disp + fragP->fr_offset) - object_address; #ifdef BFD_ASSEMBLER disp += symbol_get_frag (fragP->fr_symbol)->fr_address; #endif switch (fragP->fr_subtype) { case TAB (BCC68000, BYTE): case TAB (ABRANCH, BYTE): know (issbyte (disp)); if (disp == 0) as_bad (_("short branch with zero offset: use :w")); fragP->fr_opcode[1] = disp; ext = 0; break; case TAB (DBCC, SHORT): know (issword (disp)); ext = 2; break; case TAB (BCC68000, SHORT): case TAB (ABRANCH, SHORT): know (issword (disp)); fragP->fr_opcode[1] = 0x00; ext = 2; break; case TAB (ABRANCH, LONG): if (!HAVE_LONG_BRANCH(current_architecture)) { if (fragP->fr_opcode[0] == 0x61) /* BSR */ { fragP->fr_opcode[0] = 0x4E; fragP->fr_opcode[1] = (char) 0xB9; /* JBSR with ABSL LONG offset */ fix_new (fragP, fragP->fr_fix, 4, fragP->fr_symbol, fragP->fr_offset, 0, NO_RELOC); fragP->fr_fix += 4; ext = 0; } /* BRA */ else if (fragP->fr_opcode[0] == 0x60) { fragP->fr_opcode[0] = 0x4E; fragP->fr_opcode[1] = (char) 0xF9; /* JMP with ABSL LONG offset */ fix_new (fragP, fragP->fr_fix, 4, fragP->fr_symbol, fragP->fr_offset, 0, NO_RELOC); fragP->fr_fix += 4; ext = 0; } else { /* This should never happen, because if it's a conditional branch and we are on a 68000, BCC68000 should have been picked instead of ABRANCH. */ abort (); } } else { fragP->fr_opcode[1] = (char) 0xff; ext = 4; } break; case TAB (BCC68000, LONG): /* only Bcc 68000 instructions can come here */ /* change bcc into b!cc/jmp absl long */ fragP->fr_opcode[0] ^= 0x01; /* invert bcc */ fragP->fr_opcode[1] = 0x6;/* branch offset = 6 */ /* JF: these used to be fr_opcode[2,3], but they may be in a different frag, in which case refering to them is a no-no. Only fr_opcode[0,1] are guaranteed to work. */ *buffer_address++ = 0x4e; /* put in jmp long (0x4ef9) */ *buffer_address++ = (char) 0xf9; fragP->fr_fix += 2; /* account for jmp instruction */ fix_new (fragP, fragP->fr_fix, 4, fragP->fr_symbol, fragP->fr_offset, 0, NO_RELOC); fragP->fr_fix += 4; ext = 0; break; case TAB (DBCC, LONG): /* only DBcc 68000 instructions can come here */ /* change dbcc into dbcc/jmp absl long */ /* JF: these used to be fr_opcode[2-7], but that's wrong */ *buffer_address++ = 0x00; /* branch offset = 4 */ *buffer_address++ = 0x04; *buffer_address++ = 0x60; /* put in bra pc+6 */ *buffer_address++ = 0x06; *buffer_address++ = 0x4e; /* put in jmp long (0x4ef9) */ *buffer_address++ = (char) 0xf9; fragP->fr_fix += 6; /* account for bra/jmp instructions */ fix_new (fragP, fragP->fr_fix, 4, fragP->fr_symbol, fragP->fr_offset, 0, NO_RELOC); fragP->fr_fix += 4; ext = 0; break; case TAB (FBRANCH, SHORT): know ((fragP->fr_opcode[1] & 0x40) == 0); ext = 2; break; case TAB (FBRANCH, LONG): fragP->fr_opcode[1] |= 0x40; /* Turn on LONG bit */ ext = 4; break; case TAB (PCREL, SHORT): ext = 2; break; case TAB (PCREL, LONG): /* The thing to do here is force it to ABSOLUTE LONG, since PCREL is really trying to shorten an ABSOLUTE address anyway */ /* JF FOO This code has not been tested */ fix_new (fragP, fragP->fr_fix, 4, fragP->fr_symbol, fragP->fr_offset, 0, NO_RELOC); if ((fragP->fr_opcode[1] & 0x3F) != 0x3A) as_bad (_("Internal error (long PC-relative operand) for insn 0x%04x at 0x%lx"), (unsigned) fragP->fr_opcode[0], (unsigned long) fragP->fr_address); fragP->fr_opcode[1] &= ~0x3F; fragP->fr_opcode[1] |= 0x39; /* Mode 7.1 */ fragP->fr_fix += 4; ext = 0; break; case TAB (PCLEA, SHORT): fix_new (fragP, (int) (fragP->fr_fix), 2, fragP->fr_symbol, fragP->fr_offset, 1, NO_RELOC); fragP->fr_opcode[1] &= ~0x3F; fragP->fr_opcode[1] |= 0x3A; /* 072 - mode 7.2 */ ext = 2; break; case TAB (PCLEA, LONG): fixP = fix_new (fragP, (int) (fragP->fr_fix) + 2, 4, fragP->fr_symbol, fragP->fr_offset, 1, NO_RELOC); fixP->fx_pcrel_adjust = 2; /* Already set to mode 7.3; this indicates: PC indirect with suppressed index, 32-bit displacement. */ *buffer_address++ = 0x01; *buffer_address++ = 0x70; fragP->fr_fix += 2; ext = 4; break; case TAB (PCINDEX, BYTE): disp += 2; if (!issbyte (disp)) { as_bad (_("displacement doesn't fit in one byte")); disp = 0; } assert (fragP->fr_fix >= 2); buffer_address[-2] &= ~1; buffer_address[-1] = disp; ext = 0; break; case TAB (PCINDEX, SHORT): disp += 2; assert (issword (disp)); assert (fragP->fr_fix >= 2); buffer_address[-2] |= 0x1; buffer_address[-1] = 0x20; fixP = fix_new (fragP, (int) (fragP->fr_fix), 2, fragP->fr_symbol, fragP->fr_offset, (fragP->fr_opcode[1] & 077) == 073, NO_RELOC); fixP->fx_pcrel_adjust = 2; ext = 2; break; case TAB (PCINDEX, LONG): disp += 2; fixP = fix_new (fragP, (int) (fragP->fr_fix), 4, fragP->fr_symbol, fragP->fr_offset, (fragP->fr_opcode[1] & 077) == 073, NO_RELOC); fixP->fx_pcrel_adjust = 2; assert (fragP->fr_fix >= 2); buffer_address[-2] |= 0x1; buffer_address[-1] = 0x30; ext = 4; break; } if (ext) { md_number_to_chars (buffer_address, (long) disp, (int) ext); fragP->fr_fix += ext; } } #ifndef BFD_ASSEMBLER void md_convert_frag (headers, sec, fragP) object_headers *headers ATTRIBUTE_UNUSED; segT sec ATTRIBUTE_UNUSED; fragS *fragP; { md_convert_frag_1 (fragP); } #else void md_convert_frag (abfd, sec, fragP) bfd *abfd ATTRIBUTE_UNUSED; segT sec ATTRIBUTE_UNUSED; fragS *fragP; { md_convert_frag_1 (fragP); } #endif /* Force truly undefined symbols to their maximum size, and generally set up the frag list to be relaxed */ int md_estimate_size_before_relax (fragP, segment) register fragS *fragP; segT segment; { int old_fix; register char *buffer_address = fragP->fr_fix + fragP->fr_literal; old_fix = fragP->fr_fix; /* handle SZ_UNDEF first, it can be changed to BYTE or SHORT */ switch (fragP->fr_subtype) { case TAB (ABRANCH, SZ_UNDEF): { if ((fragP->fr_symbol != NULL) /* Not absolute */ && S_GET_SEGMENT (fragP->fr_symbol) == segment && relaxable_symbol (fragP->fr_symbol)) { fragP->fr_subtype = TAB (TABTYPE (fragP->fr_subtype), BYTE); break; } else if ((fragP->fr_symbol != NULL) && flag_short_refs) { /* Symbol is undefined and we want short ref */ fix_new (fragP, (int) (fragP->fr_fix), 2, fragP->fr_symbol, fragP->fr_offset, 1, NO_RELOC); fragP->fr_fix += 2; frag_wane (fragP); break; } else if ((fragP->fr_symbol == 0) || !HAVE_LONG_BRANCH(current_architecture)) { /* On 68000, or for absolute value, switch to abs long */ /* FIXME, we should check abs val, pick short or long */ if (fragP->fr_opcode[0] == 0x61) { fragP->fr_opcode[0] = 0x4E; fragP->fr_opcode[1] = (char) 0xB9; /* JBSR with ABSL LONG offset */ fix_new (fragP, fragP->fr_fix, 4, fragP->fr_symbol, fragP->fr_offset, 0, NO_RELOC); fragP->fr_fix += 4; frag_wane (fragP); } else if (fragP->fr_opcode[0] == 0x60) { fragP->fr_opcode[0] = 0x4E; fragP->fr_opcode[1] = (char) 0xF9; /* JMP with ABSL LONG offset */ fix_new (fragP, fragP->fr_fix, 4, fragP->fr_symbol, fragP->fr_offset, 0, NO_RELOC); fragP->fr_fix += 4; frag_wane (fragP); } else { /* This should never happen, because if it's a conditional branch and we are on a 68000, BCC68000 should have been picked instead of ABRANCH. */ abort (); } } else { /* Symbol is still undefined. Make it simple */ fix_new (fragP, (int) (fragP->fr_fix), 4, fragP->fr_symbol, fragP->fr_offset, 1, NO_RELOC); fragP->fr_fix += 4; fragP->fr_opcode[1] = (char) 0xff; frag_wane (fragP); break; } break; } /* case TAB(ABRANCH,SZ_UNDEF) */ case TAB (FBRANCH, SZ_UNDEF): { if ((S_GET_SEGMENT (fragP->fr_symbol) == segment && relaxable_symbol (fragP->fr_symbol)) || flag_short_refs) { fragP->fr_subtype = TAB (FBRANCH, SHORT); fragP->fr_var += 2; } else { fix_new (fragP, (int) fragP->fr_fix, 4, fragP->fr_symbol, fragP->fr_offset, 1, NO_RELOC); fragP->fr_fix += 4; fragP->fr_opcode[1] |= 0x40; /* Turn on LONG bit */ frag_wane (fragP); } break; } /* TAB(FBRANCH,SZ_UNDEF) */ case TAB (PCREL, SZ_UNDEF): { if ((S_GET_SEGMENT (fragP->fr_symbol) == segment && relaxable_symbol (fragP->fr_symbol)) || flag_short_refs) { fragP->fr_subtype = TAB (PCREL, SHORT); fragP->fr_var += 2; } else { fragP->fr_subtype = TAB (PCREL, LONG); fragP->fr_var += 4; } break; } /* TAB(PCREL,SZ_UNDEF) */ case TAB (BCC68000, SZ_UNDEF): { if ((fragP->fr_symbol != NULL) && S_GET_SEGMENT (fragP->fr_symbol) == segment && relaxable_symbol (fragP->fr_symbol)) { fragP->fr_subtype = TAB (BCC68000, BYTE); break; } /* only Bcc 68000 instructions can come here */ if ((fragP->fr_symbol != NULL) && flag_short_refs) { /* the user wants short refs, so emit one */ fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, fragP->fr_offset, 1, NO_RELOC); fragP->fr_fix += 2; } else { /* change bcc into b!cc/jmp absl long */ fragP->fr_opcode[0] ^= 0x01; /* invert bcc */ fragP->fr_opcode[1] = 0x06; /* branch offset = 6 */ /* JF: these were fr_opcode[2,3] */ buffer_address[0] = 0x4e; /* put in jmp long (0x4ef9) */ buffer_address[1] = (char) 0xf9; fragP->fr_fix += 2; /* account for jmp instruction */ fix_new (fragP, fragP->fr_fix, 4, fragP->fr_symbol, fragP->fr_offset, 0, NO_RELOC); fragP->fr_fix += 4; } frag_wane (fragP); break; } /* case TAB(BCC68000,SZ_UNDEF) */ case TAB (DBCC, SZ_UNDEF): { if (fragP->fr_symbol != NULL && S_GET_SEGMENT (fragP->fr_symbol) == segment && relaxable_symbol (fragP->fr_symbol)) { fragP->fr_subtype = TAB (DBCC, SHORT); fragP->fr_var += 2; break; } /* only DBcc 68000 instructions can come here */ if (fragP->fr_symbol != NULL && flag_short_refs) { /* the user wants short refs, so emit one */ fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, fragP->fr_offset, 1, NO_RELOC); fragP->fr_fix += 2; } else { /* change dbcc into dbcc/jmp absl long */ /* JF: these used to be fr_opcode[2-4], which is wrong. */ buffer_address[0] = 0x00; /* branch offset = 4 */ buffer_address[1] = 0x04; buffer_address[2] = 0x60; /* put in bra pc + ... */ /* JF: these were fr_opcode[5-7] */ buffer_address[3] = 0x06; /* Plus 6 */ buffer_address[4] = 0x4e; /* put in jmp long (0x4ef9) */ buffer_address[5] = (char) 0xf9; fragP->fr_fix += 6; /* account for bra/jmp instruction */ fix_new (fragP, fragP->fr_fix, 4, fragP->fr_symbol, fragP->fr_offset, 0, NO_RELOC); fragP->fr_fix += 4; } frag_wane (fragP); break; } /* case TAB(DBCC,SZ_UNDEF) */ case TAB (PCLEA, SZ_UNDEF): { if (((S_GET_SEGMENT (fragP->fr_symbol)) == segment && relaxable_symbol (fragP->fr_symbol)) || flag_short_refs || cpu_of_arch (current_architecture) < m68020 || cpu_of_arch (current_architecture) == mcf5200) { fragP->fr_subtype = TAB (PCLEA, SHORT); fragP->fr_var += 2; } else { fragP->fr_subtype = TAB (PCLEA, LONG); fragP->fr_var += 6; } break; } /* TAB(PCLEA,SZ_UNDEF) */ case TAB (PCINDEX, SZ_UNDEF): if ((S_GET_SEGMENT (fragP->fr_symbol) == segment && relaxable_symbol (fragP->fr_symbol)) || cpu_of_arch (current_architecture) < m68020 || cpu_of_arch (current_architecture) == mcf5200) { fragP->fr_subtype = TAB (PCINDEX, BYTE); } else { fragP->fr_subtype = TAB (PCINDEX, LONG); fragP->fr_var += 4; } break; default: break; } /* now that SZ_UNDEF are taken care of, check others */ switch (fragP->fr_subtype) { case TAB (BCC68000, BYTE): case TAB (ABRANCH, BYTE): /* We can't do a short jump to the next instruction, so in that case we force word mode. At this point S_GET_VALUE should return the offset of the symbol within its frag. If the symbol is at the start of a frag, and it is the next frag with any data in it (usually this is just the next frag, but assembler listings may introduce empty frags), we must use word mode. */ if (fragP->fr_symbol && S_GET_VALUE (fragP->fr_symbol) == 0) { fragS *stop; fragS *l; stop = symbol_get_frag (fragP->fr_symbol); for (l = fragP->fr_next; l != stop; l = l->fr_next) if (l->fr_fix + l->fr_var != 0) break; if (l == stop) { fragP->fr_subtype = TAB (TABTYPE (fragP->fr_subtype), SHORT); fragP->fr_var += 2; } } break; default: break; } return fragP->fr_var + fragP->fr_fix - old_fix; } #if defined(OBJ_AOUT) | defined(OBJ_BOUT) /* the bit-field entries in the relocation_info struct plays hell with the byte-order problems of cross-assembly. So as a hack, I added this mach. dependent ri twiddler. Ugly, but it gets you there. -KWK */ /* on m68k: first 4 bytes are normal unsigned long, next three bytes are symbolnum, most sig. byte first. Last byte is broken up with bit 7 as pcrel, bits 6 & 5 as length, bit 4 as pcrel, and the lower nibble as nuthin. (on Sun 3 at least) */ /* Translate the internal relocation information into target-specific format. */ #ifdef comment void md_ri_to_chars (the_bytes, ri) char *the_bytes; struct reloc_info_generic *ri; { /* this is easy */ md_number_to_chars (the_bytes, ri->r_address, 4); /* now the fun stuff */ the_bytes[4] = (ri->r_symbolnum >> 16) & 0x0ff; the_bytes[5] = (ri->r_symbolnum >> 8) & 0x0ff; the_bytes[6] = ri->r_symbolnum & 0x0ff; the_bytes[7] = (((ri->r_pcrel << 7) & 0x80) | ((ri->r_length << 5) & 0x60) | ((ri->r_extern << 4) & 0x10)); } #endif /* comment */ #ifndef BFD_ASSEMBLER void tc_aout_fix_to_chars (where, fixP, segment_address_in_file) char *where; fixS *fixP; relax_addressT segment_address_in_file; { /* * In: length of relocation (or of address) in chars: 1, 2 or 4. * Out: GNU LD relocation length code: 0, 1, or 2. */ static CONST unsigned char nbytes_r_length[] = {42, 0, 1, 42, 2}; long r_symbolnum; know (fixP->fx_addsy != NULL); md_number_to_chars (where, fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file, 4); r_symbolnum = (S_IS_DEFINED (fixP->fx_addsy) ? S_GET_TYPE (fixP->fx_addsy) : fixP->fx_addsy->sy_number); where[4] = (r_symbolnum >> 16) & 0x0ff; where[5] = (r_symbolnum >> 8) & 0x0ff; where[6] = r_symbolnum & 0x0ff; where[7] = (((fixP->fx_pcrel << 7) & 0x80) | ((nbytes_r_length[fixP->fx_size] << 5) & 0x60) | (((!S_IS_DEFINED (fixP->fx_addsy)) << 4) & 0x10)); } #endif #endif /* OBJ_AOUT or OBJ_BOUT */ #ifndef WORKING_DOT_WORD CONST int md_short_jump_size = 4; CONST int md_long_jump_size = 6; void md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol) char *ptr; addressT from_addr, to_addr; fragS *frag ATTRIBUTE_UNUSED; symbolS *to_symbol ATTRIBUTE_UNUSED; { valueT offset; offset = to_addr - (from_addr + 2); md_number_to_chars (ptr, (valueT) 0x6000, 2); md_number_to_chars (ptr + 2, (valueT) offset, 2); } void md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol) char *ptr; addressT from_addr, to_addr; fragS *frag; symbolS *to_symbol; { valueT offset; if (!HAVE_LONG_BRANCH(current_architecture)) { offset = to_addr - S_GET_VALUE (to_symbol); md_number_to_chars (ptr, (valueT) 0x4EF9, 2); md_number_to_chars (ptr + 2, (valueT) offset, 4); fix_new (frag, (ptr + 2) - frag->fr_literal, 4, to_symbol, (offsetT) 0, 0, NO_RELOC); } else { offset = to_addr - (from_addr + 2); md_number_to_chars (ptr, (valueT) 0x60ff, 2); md_number_to_chars (ptr + 2, (valueT) offset, 4); } } #endif /* Different values of OK tell what its OK to return. Things that aren't OK are an error (what a shock, no?) 0: Everything is OK 10: Absolute 1:8 only 20: Absolute 0:7 only 30: absolute 0:15 only 40: Absolute 0:31 only 50: absolute 0:127 only 55: absolute -64:63 only 60: absolute -128:127 only 70: absolute 0:4095 only 80: No bignums */ static int get_num (exp, ok) struct m68k_exp *exp; int ok; { if (exp->exp.X_op == O_absent) { /* Do the same thing the VAX asm does */ op (exp) = O_constant; adds (exp) = 0; subs (exp) = 0; offs (exp) = 0; if (ok == 10) { as_warn (_("expression out of range: defaulting to 1")); offs (exp) = 1; } } else if (exp->exp.X_op == O_constant) { switch (ok) { case 10: if (offs (exp) < 1 || offs (exp) > 8) { as_warn (_("expression out of range: defaulting to 1")); offs (exp) = 1; } break; case 20: if (offs (exp) < 0 || offs (exp) > 7) goto outrange; break; case 30: if (offs (exp) < 0 || offs (exp) > 15) goto outrange; break; case 40: if (offs (exp) < 0 || offs (exp) > 32) goto outrange; break; case 50: if (offs (exp) < 0 || offs (exp) > 127) goto outrange; break; case 55: if (offs (exp) < -64 || offs (exp) > 63) goto outrange; break; case 60: if (offs (exp) < -128 || offs (exp) > 127) goto outrange; break; case 70: if (offs (exp) < 0 || offs (exp) > 4095) { outrange: as_warn (_("expression out of range: defaulting to 0")); offs (exp) = 0; } break; default: break; } } else if (exp->exp.X_op == O_big) { if (offs (exp) <= 0 /* flonum */ && (ok == 80 /* no bignums */ || (ok > 10 /* small-int ranges including 0 ok */ /* If we have a flonum zero, a zero integer should do as well (e.g., in moveq). */ && generic_floating_point_number.exponent == 0 && generic_floating_point_number.low[0] == 0))) { /* HACK! Turn it into a long */ LITTLENUM_TYPE words[6]; gen_to_words (words, 2, 8L); /* These numbers are magic! */ op (exp) = O_constant; adds (exp) = 0; subs (exp) = 0; offs (exp) = words[1] | (words[0] << 16); } else if (ok != 0) { op (exp) = O_constant; adds (exp) = 0; subs (exp) = 0; offs (exp) = (ok == 10) ? 1 : 0; as_warn (_("Can't deal with expression; defaulting to %ld"), offs (exp)); } } else { if (ok >= 10 && ok <= 70) { op (exp) = O_constant; adds (exp) = 0; subs (exp) = 0; offs (exp) = (ok == 10) ? 1 : 0; as_warn (_("Can't deal with expression; defaulting to %ld"), offs (exp)); } } if (exp->size != SIZE_UNSPEC) { switch (exp->size) { case SIZE_UNSPEC: case SIZE_LONG: break; case SIZE_BYTE: if (!isbyte (offs (exp))) as_warn (_("expression doesn't fit in BYTE")); break; case SIZE_WORD: if (!isword (offs (exp))) as_warn (_("expression doesn't fit in WORD")); break; } } return offs (exp); } /* These are the back-ends for the various machine dependent pseudo-ops. */ static void s_data1 (ignore) int ignore ATTRIBUTE_UNUSED; { subseg_set (data_section, 1); demand_empty_rest_of_line (); } static void s_data2 (ignore) int ignore ATTRIBUTE_UNUSED; { subseg_set (data_section, 2); demand_empty_rest_of_line (); } static void s_bss (ignore) int ignore ATTRIBUTE_UNUSED; { /* We don't support putting frags in the BSS segment, we fake it by marking in_bss, then looking at s_skip for clues. */ subseg_set (bss_section, 0); demand_empty_rest_of_line (); } static void s_even (ignore) int ignore ATTRIBUTE_UNUSED; { register int temp; register long temp_fill; temp = 1; /* JF should be 2? */ temp_fill = get_absolute_expression (); if (!need_pass_2) /* Never make frag if expect extra pass. */ frag_align (temp, (int) temp_fill, 0); demand_empty_rest_of_line (); record_alignment (now_seg, temp); } static void s_proc (ignore) int ignore ATTRIBUTE_UNUSED; { demand_empty_rest_of_line (); } /* Pseudo-ops handled for MRI compatibility. */ /* This function returns non-zero if the argument is a conditional pseudo-op. This is called when checking whether a pending alignment is needed. */ int m68k_conditional_pseudoop (pop) pseudo_typeS *pop; { return (pop->poc_handler == s_mri_if || pop->poc_handler == s_mri_else); } /* Handle an MRI style chip specification. */ static void mri_chip () { char *s; char c; int i; s = input_line_pointer; /* We can't use get_symbol_end since the processor names are not proper symbols. */ while (is_part_of_name (c = *input_line_pointer++)) ; *--input_line_pointer = 0; for (i = 0; i < n_archs; i++) if (strcasecmp (s, archs[i].name) == 0) break; if (i >= n_archs) { as_bad (_("%s: unrecognized processor name"), s); *input_line_pointer = c; ignore_rest_of_line (); return; } *input_line_pointer = c; if (*input_line_pointer == '/') current_architecture = 0; else current_architecture &= m68881 | m68851; current_architecture |= archs[i].arch; while (*input_line_pointer == '/') { ++input_line_pointer; s = input_line_pointer; /* We can't use get_symbol_end since the processor names are not proper symbols. */ while (is_part_of_name (c = *input_line_pointer++)) ; *--input_line_pointer = 0; if (strcmp (s, "68881") == 0) current_architecture |= m68881; else if (strcmp (s, "68851") == 0) current_architecture |= m68851; *input_line_pointer = c; } /* Update info about available control registers. */ select_control_regs (); } /* The MRI CHIP pseudo-op. */ static void s_chip (ignore) int ignore ATTRIBUTE_UNUSED; { char *stop = NULL; char stopc; if (flag_mri) stop = mri_comment_field (&stopc); mri_chip (); if (flag_mri) mri_comment_end (stop, stopc); demand_empty_rest_of_line (); } /* The MRI FOPT pseudo-op. */ static void s_fopt (ignore) int ignore ATTRIBUTE_UNUSED; { SKIP_WHITESPACE (); if (strncasecmp (input_line_pointer, "ID=", 3) == 0) { int temp; input_line_pointer += 3; temp = get_absolute_expression (); if (temp < 0 || temp > 7) as_bad (_("bad coprocessor id")); else m68k_float_copnum = COP0 + temp; } else { as_bad (_("unrecognized fopt option")); ignore_rest_of_line (); return; } demand_empty_rest_of_line (); } /* The structure used to handle the MRI OPT pseudo-op. */ struct opt_action { /* The name of the option. */ const char *name; /* If this is not NULL, just call this function. The first argument is the ARG field of this structure, the second argument is whether the option was negated. */ void (*pfn) PARAMS ((int arg, int on)); /* If this is not NULL, and the PFN field is NULL, set the variable this points to. Set it to the ARG field if the option was not negated, and the NOTARG field otherwise. */ int *pvar; /* The value to pass to PFN or to assign to *PVAR. */ int arg; /* The value to assign to *PVAR if the option is negated. If PFN is NULL, and PVAR is not NULL, and ARG and NOTARG are the same, then the option may not be negated. */ int notarg; }; /* The table used to handle the MRI OPT pseudo-op. */ static void skip_to_comma PARAMS ((int, int)); static void opt_nest PARAMS ((int, int)); static void opt_chip PARAMS ((int, int)); static void opt_list PARAMS ((int, int)); static void opt_list_symbols PARAMS ((int, int)); static const struct opt_action opt_table[] = { { "abspcadd", 0, &m68k_abspcadd, 1, 0 }, /* We do relaxing, so there is little use for these options. */ { "b", 0, 0, 0, 0 }, { "brs", 0, 0, 0, 0 }, { "brb", 0, 0, 0, 0 }, { "brl", 0, 0, 0, 0 }, { "brw", 0, 0, 0, 0 }, { "c", 0, 0, 0, 0 }, { "cex", 0, 0, 0, 0 }, { "case", 0, &symbols_case_sensitive, 1, 0 }, { "cl", 0, 0, 0, 0 }, { "cre", 0, 0, 0, 0 }, { "d", 0, &flag_keep_locals, 1, 0 }, { "e", 0, 0, 0, 0 }, { "f", 0, &flag_short_refs, 1, 0 }, { "frs", 0, &flag_short_refs, 1, 0 }, { "frl", 0, &flag_short_refs, 0, 1 }, { "g", 0, 0, 0, 0 }, { "i", 0, 0, 0, 0 }, { "m", 0, 0, 0, 0 }, { "mex", 0, 0, 0, 0 }, { "mc", 0, 0, 0, 0 }, { "md", 0, 0, 0, 0 }, { "nest", opt_nest, 0, 0, 0 }, { "next", skip_to_comma, 0, 0, 0 }, { "o", 0, 0, 0, 0 }, { "old", 0, 0, 0, 0 }, { "op", skip_to_comma, 0, 0, 0 }, { "pco", 0, 0, 0, 0 }, { "p", opt_chip, 0, 0, 0 }, { "pcr", 0, 0, 0, 0 }, { "pcs", 0, 0, 0, 0 }, { "r", 0, 0, 0, 0 }, { "quick", 0, &m68k_quick, 1, 0 }, { "rel32", 0, &m68k_rel32, 1, 0 }, { "s", opt_list, 0, 0, 0 }, { "t", opt_list_symbols, 0, 0, 0 }, { "w", 0, &flag_no_warnings, 0, 1 }, { "x", 0, 0, 0, 0 } }; #define OPTCOUNT ((int) (sizeof opt_table / sizeof opt_table[0])) /* The MRI OPT pseudo-op. */ static void s_opt (ignore) int ignore ATTRIBUTE_UNUSED; { do { int t; char *s; char c; int i; const struct opt_action *o; SKIP_WHITESPACE (); t = 1; if (*input_line_pointer == '-') { ++input_line_pointer; t = 0; } else if (strncasecmp (input_line_pointer, "NO", 2) == 0) { input_line_pointer += 2; t = 0; } s = input_line_pointer; c = get_symbol_end (); for (i = 0, o = opt_table; i < OPTCOUNT; i++, o++) { if (strcasecmp (s, o->name) == 0) { if (o->pfn) { /* Restore input_line_pointer now in case the option takes arguments. */ *input_line_pointer = c; (*o->pfn) (o->arg, t); } else if (o->pvar != NULL) { if (! t && o->arg == o->notarg) as_bad (_("option `%s' may not be negated"), s); *input_line_pointer = c; *o->pvar = t ? o->arg : o->notarg; } else *input_line_pointer = c; break; } } if (i >= OPTCOUNT) { as_bad (_("option `%s' not recognized"), s); *input_line_pointer = c; } } while (*input_line_pointer++ == ','); /* Move back to terminating character. */ --input_line_pointer; demand_empty_rest_of_line (); } /* Skip ahead to a comma. This is used for OPT options which we do not suppor tand which take arguments. */ static void skip_to_comma (arg, on) int arg ATTRIBUTE_UNUSED; int on ATTRIBUTE_UNUSED; { while (*input_line_pointer != ',' && ! is_end_of_line[(unsigned char) *input_line_pointer]) ++input_line_pointer; } /* Handle the OPT NEST=depth option. */ static void opt_nest (arg, on) int arg ATTRIBUTE_UNUSED; int on ATTRIBUTE_UNUSED; { if (*input_line_pointer != '=') { as_bad (_("bad format of OPT NEST=depth")); return; } ++input_line_pointer; max_macro_nest = get_absolute_expression (); } /* Handle the OPT P=chip option. */ static void opt_chip (arg, on) int arg ATTRIBUTE_UNUSED; int on ATTRIBUTE_UNUSED; { if (*input_line_pointer != '=') { /* This is just OPT P, which we do not support. */ return; } ++input_line_pointer; mri_chip (); } /* Handle the OPT S option. */ static void opt_list (arg, on) int arg ATTRIBUTE_UNUSED; int on; { listing_list (on); } /* Handle the OPT T option. */ static void opt_list_symbols (arg, on) int arg ATTRIBUTE_UNUSED; int on; { if (on) listing |= LISTING_SYMBOLS; else listing &=~ LISTING_SYMBOLS; } /* Handle the MRI REG pseudo-op. */ static void s_reg (ignore) int ignore ATTRIBUTE_UNUSED; { char *s; int c; struct m68k_op rop; int mask; char *stop = NULL; char stopc; if (line_label == NULL) { as_bad (_("missing label")); ignore_rest_of_line (); return; } if (flag_mri) stop = mri_comment_field (&stopc); SKIP_WHITESPACE (); s = input_line_pointer; while (isalnum ((unsigned char) *input_line_pointer) #ifdef REGISTER_PREFIX || *input_line_pointer == REGISTER_PREFIX #endif || *input_line_pointer == '/' || *input_line_pointer == '-') ++input_line_pointer; c = *input_line_pointer; *input_line_pointer = '\0'; if (m68k_ip_op (s, &rop) != 0) { if (rop.error == NULL) as_bad (_("bad register list")); else as_bad (_("bad register list: %s"), rop.error); *input_line_pointer = c; ignore_rest_of_line (); return; } *input_line_pointer = c; if (rop.mode == REGLST) mask = rop.mask; else if (rop.mode == DREG) mask = 1 << (rop.reg - DATA0); else if (rop.mode == AREG) mask = 1 << (rop.reg - ADDR0 + 8); else if (rop.mode == FPREG) mask = 1 << (rop.reg - FP0 + 16); else if (rop.mode == CONTROL && rop.reg == FPI) mask = 1 << 24; else if (rop.mode == CONTROL && rop.reg == FPS) mask = 1 << 25; else if (rop.mode == CONTROL && rop.reg == FPC) mask = 1 << 26; else { as_bad (_("bad register list")); ignore_rest_of_line (); return; } S_SET_SEGMENT (line_label, reg_section); S_SET_VALUE (line_label, ~mask); symbol_set_frag (line_label, &zero_address_frag); if (flag_mri) mri_comment_end (stop, stopc); demand_empty_rest_of_line (); } /* This structure is used for the MRI SAVE and RESTORE pseudo-ops. */ struct save_opts { struct save_opts *next; int abspcadd; int symbols_case_sensitive; int keep_locals; int short_refs; int architecture; int quick; int rel32; int listing; int no_warnings; /* FIXME: We don't save OPT S. */ }; /* This variable holds the stack of saved options. */ static struct save_opts *save_stack; /* The MRI SAVE pseudo-op. */ static void s_save (ignore) int ignore ATTRIBUTE_UNUSED; { struct save_opts *s; s = (struct save_opts *) xmalloc (sizeof (struct save_opts)); s->abspcadd = m68k_abspcadd; s->symbols_case_sensitive = symbols_case_sensitive; s->keep_locals = flag_keep_locals; s->short_refs = flag_short_refs; s->architecture = current_architecture; s->quick = m68k_quick; s->rel32 = m68k_rel32; s->listing = listing; s->no_warnings = flag_no_warnings; s->next = save_stack; save_stack = s; demand_empty_rest_of_line (); } /* The MRI RESTORE pseudo-op. */ static void s_restore (ignore) int ignore ATTRIBUTE_UNUSED; { struct save_opts *s; if (save_stack == NULL) { as_bad (_("restore without save")); ignore_rest_of_line (); return; } s = save_stack; save_stack = s->next; m68k_abspcadd = s->abspcadd; symbols_case_sensitive = s->symbols_case_sensitive; flag_keep_locals = s->keep_locals; flag_short_refs = s->short_refs; current_architecture = s->architecture; m68k_quick = s->quick; m68k_rel32 = s->rel32; listing = s->listing; flag_no_warnings = s->no_warnings; free (s); demand_empty_rest_of_line (); } /* Types of MRI structured control directives. */ enum mri_control_type { mri_for, mri_if, mri_repeat, mri_while }; /* This structure is used to stack the MRI structured control directives. */ struct mri_control_info { /* The directive within which this one is enclosed. */ struct mri_control_info *outer; /* The type of directive. */ enum mri_control_type type; /* Whether an ELSE has been in an IF. */ int else_seen; /* The add or sub statement at the end of a FOR. */ char *incr; /* The label of the top of a FOR or REPEAT loop. */ char *top; /* The label to jump to for the next iteration, or the else expression of a conditional. */ char *next; /* The label to jump to to break out of the loop, or the label past the end of a conditional. */ char *bottom; }; /* The stack of MRI structured control directives. */ static struct mri_control_info *mri_control_stack; /* The current MRI structured control directive index number, used to generate label names. */ static int mri_control_index; /* Some function prototypes. */ static void mri_assemble PARAMS ((char *)); static char *mri_control_label PARAMS ((void)); static struct mri_control_info *push_mri_control PARAMS ((enum mri_control_type)); static void pop_mri_control PARAMS ((void)); static int parse_mri_condition PARAMS ((int *)); static int parse_mri_control_operand PARAMS ((int *, char **, char **, char **, char **)); static int swap_mri_condition PARAMS ((int)); static int reverse_mri_condition PARAMS ((int)); static void build_mri_control_operand PARAMS ((int, int, char *, char *, char *, char *, const char *, const char *, int)); static void parse_mri_control_expression PARAMS ((char *, int, const char *, const char *, int)); /* Assemble an instruction for an MRI structured control directive. */ static void mri_assemble (str) char *str; { char *s; /* md_assemble expects the opcode to be in lower case. */ for (s = str; *s != ' ' && *s != '\0'; s++) { if (isupper ((unsigned char) *s)) *s = tolower ((unsigned char) *s); } md_assemble (str); } /* Generate a new MRI label structured control directive label name. */ static char * mri_control_label () { char *n; n = (char *) xmalloc (20); sprintf (n, "%smc%d", FAKE_LABEL_NAME, mri_control_index); ++mri_control_index; return n; } /* Create a new MRI structured control directive. */ static struct mri_control_info * push_mri_control (type) enum mri_control_type type; { struct mri_control_info *n; n = (struct mri_control_info *) xmalloc (sizeof (struct mri_control_info)); n->type = type; n->else_seen = 0; if (type == mri_if || type == mri_while) n->top = NULL; else n->top = mri_control_label (); n->next = mri_control_label (); n->bottom = mri_control_label (); n->outer = mri_control_stack; mri_control_stack = n; return n; } /* Pop off the stack of MRI structured control directives. */ static void pop_mri_control () { struct mri_control_info *n; n = mri_control_stack; mri_control_stack = n->outer; if (n->top != NULL) free (n->top); free (n->next); free (n->bottom); free (n); } /* Recognize a condition code in an MRI structured control expression. */ static int parse_mri_condition (pcc) int *pcc; { char c1, c2; know (*input_line_pointer == '<'); ++input_line_pointer; c1 = *input_line_pointer++; c2 = *input_line_pointer++; if (*input_line_pointer != '>') { as_bad (_("syntax error in structured control directive")); return 0; } ++input_line_pointer; SKIP_WHITESPACE (); if (isupper (c1)) c1 = tolower (c1); if (isupper (c2)) c2 = tolower (c2); *pcc = (c1 << 8) | c2; return 1; } /* Parse a single operand in an MRI structured control expression. */ static int parse_mri_control_operand (pcc, leftstart, leftstop, rightstart, rightstop) int *pcc; char **leftstart; char **leftstop; char **rightstart; char **rightstop; { char *s; SKIP_WHITESPACE (); *pcc = -1; *leftstart = NULL; *leftstop = NULL; *rightstart = NULL; *rightstop = NULL; if (*input_line_pointer == '<') { /* It's just a condition code. */ return parse_mri_condition (pcc); } /* Look ahead for the condition code. */ for (s = input_line_pointer; *s != '\0'; ++s) { if (*s == '<' && s[1] != '\0' && s[2] != '\0' && s[3] == '>') break; } if (*s == '\0') { as_bad (_("missing condition code in structured control directive")); return 0; } *leftstart = input_line_pointer; *leftstop = s; if (*leftstop > *leftstart && ((*leftstop)[-1] == ' ' || (*leftstop)[-1] == '\t')) --*leftstop; input_line_pointer = s; if (! parse_mri_condition (pcc)) return 0; /* Look ahead for AND or OR or end of line. */ for (s = input_line_pointer; *s != '\0'; ++s) { if ((strncasecmp (s, "AND", 3) == 0 && (s[3] == '.' || ! is_part_of_name (s[3]))) || (strncasecmp (s, "OR", 2) == 0 && (s[2] == '.' || ! is_part_of_name (s[2])))) break; } *rightstart = input_line_pointer; *rightstop = s; if (*rightstop > *rightstart && ((*rightstop)[-1] == ' ' || (*rightstop)[-1] == '\t')) --*rightstop; input_line_pointer = s; return 1; } #define MCC(b1, b2) (((b1) << 8) | (b2)) /* Swap the sense of a condition. This changes the condition so that it generates the same result when the operands are swapped. */ static int swap_mri_condition (cc) int cc; { switch (cc) { case MCC ('h', 'i'): return MCC ('c', 's'); case MCC ('l', 's'): return MCC ('c', 'c'); case MCC ('c', 'c'): return MCC ('l', 's'); case MCC ('c', 's'): return MCC ('h', 'i'); case MCC ('p', 'l'): return MCC ('m', 'i'); case MCC ('m', 'i'): return MCC ('p', 'l'); case MCC ('g', 'e'): return MCC ('l', 'e'); case MCC ('l', 't'): return MCC ('g', 't'); case MCC ('g', 't'): return MCC ('l', 't'); case MCC ('l', 'e'): return MCC ('g', 'e'); } return cc; } /* Reverse the sense of a condition. */ static int reverse_mri_condition (cc) int cc; { switch (cc) { case MCC ('h', 'i'): return MCC ('l', 's'); case MCC ('l', 's'): return MCC ('h', 'i'); case MCC ('c', 'c'): return MCC ('c', 's'); case MCC ('c', 's'): return MCC ('c', 'c'); case MCC ('n', 'e'): return MCC ('e', 'q'); case MCC ('e', 'q'): return MCC ('n', 'e'); case MCC ('v', 'c'): return MCC ('v', 's'); case MCC ('v', 's'): return MCC ('v', 'c'); case MCC ('p', 'l'): return MCC ('m', 'i'); case MCC ('m', 'i'): return MCC ('p', 'l'); case MCC ('g', 'e'): return MCC ('l', 't'); case MCC ('l', 't'): return MCC ('g', 'e'); case MCC ('g', 't'): return MCC ('l', 'e'); case MCC ('l', 'e'): return MCC ('g', 't'); } return cc; } /* Build an MRI structured control expression. This generates test and branch instructions. It goes to TRUELAB if the condition is true, and to FALSELAB if the condition is false. Exactly one of TRUELAB and FALSELAB will be NULL, meaning to fall through. QUAL is the size qualifier for the expression. EXTENT is the size to use for the branch. */ static void build_mri_control_operand (qual, cc, leftstart, leftstop, rightstart, rightstop, truelab, falselab, extent) int qual; int cc; char *leftstart; char *leftstop; char *rightstart; char *rightstop; const char *truelab; const char *falselab; int extent; { char *buf; char *s; if (leftstart != NULL) { struct m68k_op leftop, rightop; char c; /* Swap the compare operands, if necessary, to produce a legal m68k compare instruction. Comparing a register operand with a non-register operand requires the register to be on the right (cmp, cmpa). Comparing an immediate value with anything requires the immediate value to be on the left (cmpi). */ c = *leftstop; *leftstop = '\0'; (void) m68k_ip_op (leftstart, &leftop); *leftstop = c; c = *rightstop; *rightstop = '\0'; (void) m68k_ip_op (rightstart, &rightop); *rightstop = c; if (rightop.mode == IMMED || ((leftop.mode == DREG || leftop.mode == AREG) && (rightop.mode != DREG && rightop.mode != AREG))) { char *temp; cc = swap_mri_condition (cc); temp = leftstart; leftstart = rightstart; rightstart = temp; temp = leftstop; leftstop = rightstop; rightstop = temp; } } if (truelab == NULL) { cc = reverse_mri_condition (cc); truelab = falselab; } if (leftstart != NULL) { buf = (char *) xmalloc (20 + (leftstop - leftstart) + (rightstop - rightstart)); s = buf; *s++ = 'c'; *s++ = 'm'; *s++ = 'p'; if (qual != '\0') *s++ = qual; *s++ = ' '; memcpy (s, leftstart, leftstop - leftstart); s += leftstop - leftstart; *s++ = ','; memcpy (s, rightstart, rightstop - rightstart); s += rightstop - rightstart; *s = '\0'; mri_assemble (buf); free (buf); } buf = (char *) xmalloc (20 + strlen (truelab)); s = buf; *s++ = 'b'; *s++ = cc >> 8; *s++ = cc & 0xff; if (extent != '\0') *s++ = extent; *s++ = ' '; strcpy (s, truelab); mri_assemble (buf); free (buf); } /* Parse an MRI structured control expression. This generates test and branch instructions. STOP is where the expression ends. It goes to TRUELAB if the condition is true, and to FALSELAB if the condition is false. Exactly one of TRUELAB and FALSELAB will be NULL, meaning to fall through. QUAL is the size qualifier for the expression. EXTENT is the size to use for the branch. */ static void parse_mri_control_expression (stop, qual, truelab, falselab, extent) char *stop; int qual; const char *truelab; const char *falselab; int extent; { int c; int cc; char *leftstart; char *leftstop; char *rightstart; char *rightstop; c = *stop; *stop = '\0'; if (! parse_mri_control_operand (&cc, &leftstart, &leftstop, &rightstart, &rightstop)) { *stop = c; return; } if (strncasecmp (input_line_pointer, "AND", 3) == 0) { const char *flab; if (falselab != NULL) flab = falselab; else flab = mri_control_label (); build_mri_control_operand (qual, cc, leftstart, leftstop, rightstart, rightstop, (const char *) NULL, flab, extent); input_line_pointer += 3; if (*input_line_pointer != '.' || input_line_pointer[1] == '\0') qual = '\0'; else { qual = input_line_pointer[1]; input_line_pointer += 2; } if (! parse_mri_control_operand (&cc, &leftstart, &leftstop, &rightstart, &rightstop)) { *stop = c; return; } build_mri_control_operand (qual, cc, leftstart, leftstop, rightstart, rightstop, truelab, falselab, extent); if (falselab == NULL) colon (flab); } else if (strncasecmp (input_line_pointer, "OR", 2) == 0) { const char *tlab; if (truelab != NULL) tlab = truelab; else tlab = mri_control_label (); build_mri_control_operand (qual, cc, leftstart, leftstop, rightstart, rightstop, tlab, (const char *) NULL, extent); input_line_pointer += 2; if (*input_line_pointer != '.' || input_line_pointer[1] == '\0') qual = '\0'; else { qual = input_line_pointer[1]; input_line_pointer += 2; } if (! parse_mri_control_operand (&cc, &leftstart, &leftstop, &rightstart, &rightstop)) { *stop = c; return; } build_mri_control_operand (qual, cc, leftstart, leftstop, rightstart, rightstop, truelab, falselab, extent); if (truelab == NULL) colon (tlab); } else { build_mri_control_operand (qual, cc, leftstart, leftstop, rightstart, rightstop, truelab, falselab, extent); } *stop = c; if (input_line_pointer != stop) as_bad (_("syntax error in structured control directive")); } /* Handle the MRI IF pseudo-op. This may be a structured control directive, or it may be a regular assembler conditional, depending on its operands. */ static void s_mri_if (qual) int qual; { char *s; int c; struct mri_control_info *n; /* A structured control directive must end with THEN with an optional qualifier. */ s = input_line_pointer; while (! is_end_of_line[(unsigned char) *s] && (! flag_mri || *s != '*')) ++s; --s; while (s > input_line_pointer && (*s == ' ' || *s == '\t')) --s; if (s - input_line_pointer > 1 && s[-1] == '.') s -= 2; if (s - input_line_pointer < 3 || strncasecmp (s - 3, "THEN", 4) != 0) { if (qual != '\0') { as_bad (_("missing then")); ignore_rest_of_line (); return; } /* It's a conditional. */ s_if (O_ne); return; } /* Since this might be a conditional if, this pseudo-op will be called even if we are supported to be ignoring input. Double check now. Clobber *input_line_pointer so that ignore_input thinks that this is not a special pseudo-op. */ c = *input_line_pointer; *input_line_pointer = 0; if (ignore_input ()) { *input_line_pointer = c; while (! is_end_of_line[(unsigned char) *input_line_pointer]) ++input_line_pointer; demand_empty_rest_of_line (); return; } *input_line_pointer = c; n = push_mri_control (mri_if); parse_mri_control_expression (s - 3, qual, (const char *) NULL, n->next, s[1] == '.' ? s[2] : '\0'); if (s[1] == '.') input_line_pointer = s + 3; else input_line_pointer = s + 1; if (flag_mri) { while (! is_end_of_line[(unsigned char) *input_line_pointer]) ++input_line_pointer; } demand_empty_rest_of_line (); } /* Handle the MRI else pseudo-op. If we are currently doing an MRI structured IF, associate the ELSE with the IF. Otherwise, assume it is a conditional else. */ static void s_mri_else (qual) int qual; { int c; char *buf; char q[2]; if (qual == '\0' && (mri_control_stack == NULL || mri_control_stack->type != mri_if || mri_control_stack->else_seen)) { s_else (0); return; } c = *input_line_pointer; *input_line_pointer = 0; if (ignore_input ()) { *input_line_pointer = c; while (! is_end_of_line[(unsigned char) *input_line_pointer]) ++input_line_pointer; demand_empty_rest_of_line (); return; } *input_line_pointer = c; if (mri_control_stack == NULL || mri_control_stack->type != mri_if || mri_control_stack->else_seen) { as_bad (_("else without matching if")); ignore_rest_of_line (); return; } mri_control_stack->else_seen = 1; buf = (char *) xmalloc (20 + strlen (mri_control_stack->bottom)); q[0] = qual; q[1] = '\0'; sprintf (buf, "bra%s %s", q, mri_control_stack->bottom); mri_assemble (buf); free (buf); colon (mri_control_stack->next); if (flag_mri) { while (! is_end_of_line[(unsigned char) *input_line_pointer]) ++input_line_pointer; } demand_empty_rest_of_line (); } /* Handle the MRI ENDI pseudo-op. */ static void s_mri_endi (ignore) int ignore ATTRIBUTE_UNUSED; { if (mri_control_stack == NULL || mri_control_stack->type != mri_if) { as_bad (_("endi without matching if")); ignore_rest_of_line (); return; } /* ignore_input will not return true for ENDI, so we don't need to worry about checking it again here. */ if (! mri_control_stack->else_seen) colon (mri_control_stack->next); colon (mri_control_stack->bottom); pop_mri_control (); if (flag_mri) { while (! is_end_of_line[(unsigned char) *input_line_pointer]) ++input_line_pointer; } demand_empty_rest_of_line (); } /* Handle the MRI BREAK pseudo-op. */ static void s_mri_break (extent) int extent; { struct mri_control_info *n; char *buf; char ex[2]; n = mri_control_stack; while (n != NULL && n->type != mri_for && n->type != mri_repeat && n->type != mri_while) n = n->outer; if (n == NULL) { as_bad (_("break outside of structured loop")); ignore_rest_of_line (); return; } buf = (char *) xmalloc (20 + strlen (n->bottom)); ex[0] = extent; ex[1] = '\0'; sprintf (buf, "bra%s %s", ex, n->bottom); mri_assemble (buf); free (buf); if (flag_mri) { while (! is_end_of_line[(unsigned char) *input_line_pointer]) ++input_line_pointer; } demand_empty_rest_of_line (); } /* Handle the MRI NEXT pseudo-op. */ static void s_mri_next (extent) int extent; { struct mri_control_info *n; char *buf; char ex[2]; n = mri_control_stack; while (n != NULL && n->type != mri_for && n->type != mri_repeat && n->type != mri_while) n = n->outer; if (n == NULL) { as_bad (_("next outside of structured loop")); ignore_rest_of_line (); return; } buf = (char *) xmalloc (20 + strlen (n->next)); ex[0] = extent; ex[1] = '\0'; sprintf (buf, "bra%s %s", ex, n->next); mri_assemble (buf); free (buf); if (flag_mri) { while (! is_end_of_line[(unsigned char) *input_line_pointer]) ++input_line_pointer; } demand_empty_rest_of_line (); } /* Handle the MRI FOR pseudo-op. */ static void s_mri_for (qual) int qual; { const char *varstart, *varstop; const char *initstart, *initstop; const char *endstart, *endstop; const char *bystart, *bystop; int up; int by; int extent; struct mri_control_info *n; char *buf; char *s; char ex[2]; /* The syntax is FOR.q var = init { TO | DOWNTO } end [ BY by ] DO.e */ SKIP_WHITESPACE (); varstart = input_line_pointer; /* Look for the '='. */ while (! is_end_of_line[(unsigned char) *input_line_pointer] && *input_line_pointer != '=') ++input_line_pointer; if (*input_line_pointer != '=') { as_bad (_("missing =")); ignore_rest_of_line (); return; } varstop = input_line_pointer; if (varstop > varstart && (varstop[-1] == ' ' || varstop[-1] == '\t')) --varstop; ++input_line_pointer; initstart = input_line_pointer; /* Look for TO or DOWNTO. */ up = 1; initstop = NULL; while (! is_end_of_line[(unsigned char) *input_line_pointer]) { if (strncasecmp (input_line_pointer, "TO", 2) == 0 && ! is_part_of_name (input_line_pointer[2])) { initstop = input_line_pointer; input_line_pointer += 2; break; } if (strncasecmp (input_line_pointer, "DOWNTO", 6) == 0 && ! is_part_of_name (input_line_pointer[6])) { initstop = input_line_pointer; up = 0; input_line_pointer += 6; break; } ++input_line_pointer; } if (initstop == NULL) { as_bad (_("missing to or downto")); ignore_rest_of_line (); return; } if (initstop > initstart && (initstop[-1] == ' ' || initstop[-1] == '\t')) --initstop; SKIP_WHITESPACE (); endstart = input_line_pointer; /* Look for BY or DO. */ by = 0; endstop = NULL; while (! is_end_of_line[(unsigned char) *input_line_pointer]) { if (strncasecmp (input_line_pointer, "BY", 2) == 0 && ! is_part_of_name (input_line_pointer[2])) { endstop = input_line_pointer; by = 1; input_line_pointer += 2; break; } if (strncasecmp (input_line_pointer, "DO", 2) == 0 && (input_line_pointer[2] == '.' || ! is_part_of_name (input_line_pointer[2]))) { endstop = input_line_pointer; input_line_pointer += 2; break; } ++input_line_pointer; } if (endstop == NULL) { as_bad (_("missing do")); ignore_rest_of_line (); return; } if (endstop > endstart && (endstop[-1] == ' ' || endstop[-1] == '\t')) --endstop; if (! by) { bystart = "#1"; bystop = bystart + 2; } else { SKIP_WHITESPACE (); bystart = input_line_pointer; /* Look for DO. */ bystop = NULL; while (! is_end_of_line[(unsigned char) *input_line_pointer]) { if (strncasecmp (input_line_pointer, "DO", 2) == 0 && (input_line_pointer[2] == '.' || ! is_part_of_name (input_line_pointer[2]))) { bystop = input_line_pointer; input_line_pointer += 2; break; } ++input_line_pointer; } if (bystop == NULL) { as_bad (_("missing do")); ignore_rest_of_line (); return; } if (bystop > bystart && (bystop[-1] == ' ' || bystop[-1] == '\t')) --bystop; } if (*input_line_pointer != '.') extent = '\0'; else { extent = input_line_pointer[1]; input_line_pointer += 2; } /* We have fully parsed the FOR operands. Now build the loop. */ n = push_mri_control (mri_for); buf = (char *) xmalloc (50 + (input_line_pointer - varstart)); /* move init,var */ s = buf; *s++ = 'm'; *s++ = 'o'; *s++ = 'v'; *s++ = 'e'; if (qual != '\0') *s++ = qual; *s++ = ' '; memcpy (s, initstart, initstop - initstart); s += initstop - initstart; *s++ = ','; memcpy (s, varstart, varstop - varstart); s += varstop - varstart; *s = '\0'; mri_assemble (buf); colon (n->top); /* cmp end,var */ s = buf; *s++ = 'c'; *s++ = 'm'; *s++ = 'p'; if (qual != '\0') *s++ = qual; *s++ = ' '; memcpy (s, endstart, endstop - endstart); s += endstop - endstart; *s++ = ','; memcpy (s, varstart, varstop - varstart); s += varstop - varstart; *s = '\0'; mri_assemble (buf); /* bcc bottom */ ex[0] = extent; ex[1] = '\0'; if (up) sprintf (buf, "blt%s %s", ex, n->bottom); else sprintf (buf, "bgt%s %s", ex, n->bottom); mri_assemble (buf); /* Put together the add or sub instruction used by ENDF. */ s = buf; if (up) strcpy (s, "add"); else strcpy (s, "sub"); s += 3; if (qual != '\0') *s++ = qual; *s++ = ' '; memcpy (s, bystart, bystop - bystart); s += bystop - bystart; *s++ = ','; memcpy (s, varstart, varstop - varstart); s += varstop - varstart; *s = '\0'; n->incr = buf; if (flag_mri) { while (! is_end_of_line[(unsigned char) *input_line_pointer]) ++input_line_pointer; } demand_empty_rest_of_line (); } /* Handle the MRI ENDF pseudo-op. */ static void s_mri_endf (ignore) int ignore ATTRIBUTE_UNUSED; { if (mri_control_stack == NULL || mri_control_stack->type != mri_for) { as_bad (_("endf without for")); ignore_rest_of_line (); return; } colon (mri_control_stack->next); mri_assemble (mri_control_stack->incr); sprintf (mri_control_stack->incr, "bra %s", mri_control_stack->top); mri_assemble (mri_control_stack->incr); free (mri_control_stack->incr); colon (mri_control_stack->bottom); pop_mri_control (); if (flag_mri) { while (! is_end_of_line[(unsigned char) *input_line_pointer]) ++input_line_pointer; } demand_empty_rest_of_line (); } /* Handle the MRI REPEAT pseudo-op. */ static void s_mri_repeat (ignore) int ignore ATTRIBUTE_UNUSED; { struct mri_control_info *n; n = push_mri_control (mri_repeat); colon (n->top); if (flag_mri) { while (! is_end_of_line[(unsigned char) *input_line_pointer]) ++input_line_pointer; } demand_empty_rest_of_line (); } /* Handle the MRI UNTIL pseudo-op. */ static void s_mri_until (qual) int qual; { char *s; if (mri_control_stack == NULL || mri_control_stack->type != mri_repeat) { as_bad (_("until without repeat")); ignore_rest_of_line (); return; } colon (mri_control_stack->next); for (s = input_line_pointer; ! is_end_of_line[(unsigned char) *s]; s++) ; parse_mri_control_expression (s, qual, (const char *) NULL, mri_control_stack->top, '\0'); colon (mri_control_stack->bottom); input_line_pointer = s; pop_mri_control (); if (flag_mri) { while (! is_end_of_line[(unsigned char) *input_line_pointer]) ++input_line_pointer; } demand_empty_rest_of_line (); } /* Handle the MRI WHILE pseudo-op. */ static void s_mri_while (qual) int qual; { char *s; struct mri_control_info *n; s = input_line_pointer; while (! is_end_of_line[(unsigned char) *s] && (! flag_mri || *s != '*')) s++; --s; while (*s == ' ' || *s == '\t') --s; if (s - input_line_pointer > 1 && s[-1] == '.') s -= 2; if (s - input_line_pointer < 2 || strncasecmp (s - 1, "DO", 2) != 0) { as_bad (_("missing do")); ignore_rest_of_line (); return; } n = push_mri_control (mri_while); colon (n->next); parse_mri_control_expression (s - 1, qual, (const char *) NULL, n->bottom, s[1] == '.' ? s[2] : '\0'); input_line_pointer = s + 1; if (*input_line_pointer == '.') input_line_pointer += 2; if (flag_mri) { while (! is_end_of_line[(unsigned char) *input_line_pointer]) ++input_line_pointer; } demand_empty_rest_of_line (); } /* Handle the MRI ENDW pseudo-op. */ static void s_mri_endw (ignore) int ignore ATTRIBUTE_UNUSED; { char *buf; if (mri_control_stack == NULL || mri_control_stack->type != mri_while) { as_bad (_("endw without while")); ignore_rest_of_line (); return; } buf = (char *) xmalloc (20 + strlen (mri_control_stack->next)); sprintf (buf, "bra %s", mri_control_stack->next); mri_assemble (buf); free (buf); colon (mri_control_stack->bottom); pop_mri_control (); if (flag_mri) { while (! is_end_of_line[(unsigned char) *input_line_pointer]) ++input_line_pointer; } demand_empty_rest_of_line (); } /* * md_parse_option * Invocation line includes a switch not recognized by the base assembler. * See if it's a processor-specific option. These are: * * -[A]m[c]68000, -[A]m[c]68008, -[A]m[c]68010, -[A]m[c]68020, -[A]m[c]68030, -[A]m[c]68040 * -[A]m[c]68881, -[A]m[c]68882, -[A]m[c]68851 * Select the architecture. Instructions or features not * supported by the selected architecture cause fatal * errors. More than one may be specified. The default is * -m68020 -m68851 -m68881. Note that -m68008 is a synonym * for -m68000, and -m68882 is a synonym for -m68881. * -[A]m[c]no-68851, -[A]m[c]no-68881 * Don't accept 688?1 instructions. (The "c" is kind of silly, * so don't use or document it, but that's the way the parsing * works). * * -pic Indicates PIC. * -k Indicates PIC. (Sun 3 only.) * * --bitwise-or * Permit `|' to be used in expressions. * */ #ifdef OBJ_ELF CONST char *md_shortopts = "lSA:m:kQ:V"; #else CONST char *md_shortopts = "lSA:m:k"; #endif struct option md_longopts[] = { #define OPTION_PIC (OPTION_MD_BASE) {"pic", no_argument, NULL, OPTION_PIC}, #define OPTION_REGISTER_PREFIX_OPTIONAL (OPTION_MD_BASE + 1) {"register-prefix-optional", no_argument, NULL, OPTION_REGISTER_PREFIX_OPTIONAL}, #define OPTION_BITWISE_OR (OPTION_MD_BASE + 2) {"bitwise-or", no_argument, NULL, OPTION_BITWISE_OR}, #define OPTION_BASE_SIZE_DEFAULT_16 (OPTION_MD_BASE + 3) {"base-size-default-16", no_argument, NULL, OPTION_BASE_SIZE_DEFAULT_16}, #define OPTION_BASE_SIZE_DEFAULT_32 (OPTION_MD_BASE + 4) {"base-size-default-32", no_argument, NULL, OPTION_BASE_SIZE_DEFAULT_32}, #define OPTION_DISP_SIZE_DEFAULT_16 (OPTION_MD_BASE + 5) {"disp-size-default-16", no_argument, NULL, OPTION_DISP_SIZE_DEFAULT_16}, #define OPTION_DISP_SIZE_DEFAULT_32 (OPTION_MD_BASE + 6) {"disp-size-default-32", no_argument, NULL, OPTION_DISP_SIZE_DEFAULT_32}, {NULL, no_argument, NULL, 0} }; size_t md_longopts_size = sizeof(md_longopts); int md_parse_option (c, arg) int c; char *arg; { switch (c) { case 'l': /* -l means keep external to 2 bit offset rather than 16 bit one */ flag_short_refs = 1; break; case 'S': /* -S means that jbsr's always turn into jsr's. */ flag_long_jumps = 1; break; case 'A': if (*arg == 'm') arg++; /* intentional fall-through */ case 'm': if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-') { int i; unsigned long arch; const char *oarg = arg; arg += 3; if (*arg == 'm') { arg++; if (arg[0] == 'c' && arg[1] == '6') arg++; } for (i = 0; i < n_archs; i++) if (!strcmp (arg, archs[i].name)) break; if (i == n_archs) { unknown: as_bad (_("unrecognized option `%s'"), oarg); return 0; } arch = archs[i].arch; if (arch == m68881) no_68881 = 1; else if (arch == m68851) no_68851 = 1; else goto unknown; } else { int i; if (arg[0] == 'c' && arg[1] == '6') arg++; for (i = 0; i < n_archs; i++) if (!strcmp (arg, archs[i].name)) { unsigned long arch = archs[i].arch; if (cpu_of_arch (arch)) /* It's a cpu spec. */ { current_architecture &= ~m68000up; current_architecture |= arch; } else if (arch == m68881) { current_architecture |= m68881; no_68881 = 0; } else if (arch == m68851) { current_architecture |= m68851; no_68851 = 0; } else /* ??? */ abort (); break; } if (i == n_archs) { as_bad (_("unrecognized architecture specification `%s'"), arg); return 0; } } break; case OPTION_PIC: case 'k': flag_want_pic = 1; break; /* -pic, Position Independent Code */ case OPTION_REGISTER_PREFIX_OPTIONAL: flag_reg_prefix_optional = 1; reg_prefix_optional_seen = 1; break; /* -V: SVR4 argument to print version ID. */ case 'V': print_version_id (); break; /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section should be emitted or not. FIXME: Not implemented. */ case 'Q': break; case OPTION_BITWISE_OR: { char *n, *t; const char *s; n = (char *) xmalloc (strlen (m68k_comment_chars) + 1); t = n; for (s = m68k_comment_chars; *s != '\0'; s++) if (*s != '|') *t++ = *s; *t = '\0'; m68k_comment_chars = n; } break; case OPTION_BASE_SIZE_DEFAULT_16: m68k_index_width_default = SIZE_WORD; break; case OPTION_BASE_SIZE_DEFAULT_32: m68k_index_width_default = SIZE_LONG; break; case OPTION_DISP_SIZE_DEFAULT_16: m68k_rel32 = 0; m68k_rel32_from_cmdline = 1; break; case OPTION_DISP_SIZE_DEFAULT_32: m68k_rel32 = 1; m68k_rel32_from_cmdline = 1; break; default: return 0; } return 1; } void md_show_usage (stream) FILE *stream; { fprintf(stream, _("\ 680X0 options:\n\ -l use 1 word for refs to undefined symbols [default 2]\n\ -m68000 | -m68008 | -m68010 | -m68020 | -m68030 | -m68040 | -m68060\n\ | -m68302 | -m68331 | -m68332 | -m68333 | -m68340 | -m68360\n\ | -mcpu32 | -m5200\n\ specify variant of 680X0 architecture [default 68020]\n\ -m68881 | -m68882 | -mno-68881 | -mno-68882\n\ target has/lacks floating-point coprocessor\n\ [default yes for 68020, 68030, and cpu32]\n")); fprintf(stream, _("\ -m68851 | -mno-68851\n\ target has/lacks memory-management unit coprocessor\n\ [default yes for 68020 and up]\n\ -pic, -k generate position independent code\n\ -S turn jbsr into jsr\n\ --register-prefix-optional\n\ recognize register names without prefix character\n\ --bitwise-or do not treat `|' as a comment character\n")); fprintf (stream, _("\ --base-size-default-16 base reg without size is 16 bits\n\ --base-size-default-32 base reg without size is 32 bits (default)\n\ --disp-size-default-16 displacement with unknown size is 16 bits\n\ --disp-size-default-32 displacement with unknown size is 32 bits (default)\n")); } #ifdef TEST2 /* TEST2: Test md_assemble() */ /* Warning, this routine probably doesn't work anymore */ main () { struct m68k_it the_ins; char buf[120]; char *cp; int n; m68k_ip_begin (); for (;;) { if (!gets (buf) || !*buf) break; if (buf[0] == '|' || buf[1] == '.') continue; for (cp = buf; *cp; cp++) if (*cp == '\t') *cp = ' '; if (is_label (buf)) continue; memset (&the_ins, '\0', sizeof (the_ins)); m68k_ip (&the_ins, buf); if (the_ins.error) { printf (_("Error %s in %s\n"), the_ins.error, buf); } else { printf (_("Opcode(%d.%s): "), the_ins.numo, the_ins.args); for (n = 0; n < the_ins.numo; n++) printf (" 0x%x", the_ins.opcode[n] & 0xffff); printf (" "); print_the_insn (&the_ins.opcode[0], stdout); (void) putchar ('\n'); } for (n = 0; n < strlen (the_ins.args) / 2; n++) { if (the_ins.operands[n].error) { printf ("op%d Error %s in %s\n", n, the_ins.operands[n].error, buf); continue; } printf ("mode %d, reg %d, ", the_ins.operands[n].mode, the_ins.operands[n].reg); if (the_ins.operands[n].b_const) printf ("Constant: '%.*s', ", 1 + the_ins.operands[n].e_const - the_ins.operands[n].b_const, the_ins.operands[n].b_const); printf ("ireg %d, isiz %d, imul %d, ", the_ins.operands[n].ireg, the_ins.operands[n].isiz, the_ins.operands[n].imul); if (the_ins.operands[n].b_iadd) printf ("Iadd: '%.*s',", 1 + the_ins.operands[n].e_iadd - the_ins.operands[n].b_iadd, the_ins.operands[n].b_iadd); (void) putchar ('\n'); } } m68k_ip_end (); return 0; } is_label (str) char *str; { while (*str == ' ') str++; while (*str && *str != ' ') str++; if (str[-1] == ':' || str[1] == '=') return 1; return 0; } #endif /* Possible states for relaxation: 0 0 branch offset byte (bra, etc) 0 1 word 0 2 long 1 0 indexed offsets byte a0@(32,d4:w:1) etc 1 1 word 1 2 long 2 0 two-offset index word-word a0@(32,d4)@(45) etc 2 1 word-long 2 2 long-word 2 3 long-long */ /* We have no need to default values of symbols. */ /* ARGSUSED */ symbolS * md_undefined_symbol (name) char *name ATTRIBUTE_UNUSED; { return 0; } /* Round up a section size to the appropriate boundary. */ valueT md_section_align (segment, size) segT segment ATTRIBUTE_UNUSED; valueT size; { #ifdef OBJ_AOUT #ifdef BFD_ASSEMBLER /* For a.out, force the section size to be aligned. If we don't do this, BFD will align it for us, but it will not write out the final bytes of the section. This may be a bug in BFD, but it is easier to fix it here since that is how the other a.out targets work. */ int align; align = bfd_get_section_alignment (stdoutput, segment); size = ((size + (1 << align) - 1) & ((valueT) -1 << align)); #endif #endif return size; } /* Exactly what point is a PC-relative offset relative TO? On the 68k, it is relative to the address of the first extension word. The difference between the addresses of the offset and the first extension word is stored in fx_pcrel_adjust. */ long md_pcrel_from (fixP) fixS *fixP; { int adjust; /* Because fx_pcrel_adjust is a char, and may be unsigned, we store -1 as 64. */ adjust = fixP->fx_pcrel_adjust; if (adjust == 64) adjust = -1; return fixP->fx_where + fixP->fx_frag->fr_address - adjust; } #ifndef BFD_ASSEMBLER #ifdef OBJ_COFF /*ARGSUSED*/ void tc_coff_symbol_emit_hook (ignore) symbolS *ignore ATTRIBUTE_UNUSED; { } int tc_coff_sizemachdep (frag) fragS *frag; { switch (frag->fr_subtype & 0x3) { case BYTE: return 1; case SHORT: return 2; case LONG: return 4; default: abort (); return 0; } } #endif #endif #ifdef OBJ_ELF void m68k_elf_final_processing() { /* Set file-specific flags if this is a cpu32 processor */ if (cpu_of_arch (current_architecture) & cpu32) elf_elfheader (stdoutput)->e_flags |= EF_CPU32; } #endif /* end of tc-m68k.c */