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250 lines
8.6 KiB
C
250 lines
8.6 KiB
C
/* This file is tc-sh.h
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Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
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2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#define TC_SH
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#define TARGET_ARCH bfd_arch_sh
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/* The type fixS is defined (to struct fix) in write.h, but write.h uses
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definitions from this file. To avoid problems with including write.h
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after the "right" definitions, don't; just forward-declare struct fix
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here. */
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struct fix;
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struct segment_info_struct;
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struct internal_reloc;
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/* Whether -relax was used. */
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extern int sh_relax;
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/* Whether -small was used. */
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extern int sh_small;
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/* Don't try to break words. */
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#define WORKING_DOT_WORD
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/* We require .long, et. al., to be aligned correctly. */
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#define md_cons_align(nbytes) sh_cons_align (nbytes)
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extern void sh_cons_align (int);
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/* We need to optimize expr with taking account of rs_align_test
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frags. */
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#ifdef OBJ_ELF
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#define md_optimize_expr(l,o,r) sh_optimize_expr (l, o, r)
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extern int sh_optimize_expr (expressionS *, operatorT, expressionS *);
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#endif
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/* When relaxing, we need to generate relocations for alignment
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directives. */
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#define HANDLE_ALIGN(frag) sh_handle_align (frag)
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extern void sh_handle_align (fragS *);
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#define MAX_MEM_FOR_RS_ALIGN_CODE (1 + 2)
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/* We need to force out some relocations when relaxing. */
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#define TC_FORCE_RELOCATION(fix) sh_force_relocation (fix)
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extern int sh_force_relocation (struct fix *);
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/* This macro decides whether a particular reloc is an entry in a
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switch table. It is used when relaxing, because the linker needs
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to know about all such entries so that it can adjust them if
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necessary. */
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#define SWITCH_TABLE(FIX) \
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((FIX)->fx_addsy != NULL \
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&& (FIX)->fx_subsy != NULL \
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&& S_GET_SEGMENT ((FIX)->fx_addsy) == text_section \
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&& S_GET_SEGMENT ((FIX)->fx_subsy) == text_section \
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&& ((FIX)->fx_r_type == BFD_RELOC_32 \
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|| (FIX)->fx_r_type == BFD_RELOC_16 \
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|| (FIX)->fx_r_type == BFD_RELOC_8))
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#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \
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(! SEG_NORMAL (SEC) \
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|| TC_FORCE_RELOCATION (FIX) \
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|| (sh_relax && SWITCH_TABLE (FIX)))
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/* Don't complain when we leave fx_subsy around. */
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#define TC_VALIDATE_FIX_SUB(FIX) \
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(sh_relax && SWITCH_TABLE (FIX))
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#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
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extern long md_pcrel_from_section (struct fix *, segT);
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/* SH_COUNT relocs are allowed outside of frag.
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The target is also buggy and sets fix size too large for other relocs. */
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#define TC_FX_SIZE_SLACK(FIX) \
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((FIX)->fx_r_type == BFD_RELOC_SH_COUNT ? -1 : 2)
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#define IGNORE_NONSTANDARD_ESCAPES
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#define LISTING_HEADER \
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(!target_big_endian \
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? "Renesas / SuperH SH GAS Little Endian" \
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: "Renesas / SuperH SH GAS Big Endian")
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#define md_operand(x)
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extern const struct relax_type md_relax_table[];
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#define TC_GENERIC_RELAX_TABLE md_relax_table
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/* We record, for each section, whether we have most recently output a
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CODE reloc or a DATA reloc. */
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struct sh_segment_info_type
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{
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int in_code : 1;
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};
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#define TC_SEGMENT_INFO_TYPE struct sh_segment_info_type
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/* We call a routine to emit a reloc for a label, so that the linker
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can align loads and stores without crossing a label. */
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extern void sh_frob_label (symbolS *);
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#define tc_frob_label(sym) sh_frob_label (sym)
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/* We call a routine to flush pending output in order to output a DATA
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reloc when required. */
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extern void sh_flush_pending_output (void);
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#define md_flush_pending_output() sh_flush_pending_output ()
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#define tc_frob_file_before_adjust sh_frob_file
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extern void sh_frob_file (void);
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#ifdef OBJ_COFF
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/* COFF specific definitions. */
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#define COFF_MAGIC (!target_big_endian ? SH_ARCH_MAGIC_LITTLE : SH_ARCH_MAGIC_BIG)
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#define tc_coff_symbol_emit_hook(a) ; /* not used */
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#define TC_KEEP_FX_OFFSET 1
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#define SEG_NAME(SEG) segment_name (SEG)
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/* We align most sections to a 16 byte boundary. */
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#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
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(strncmp (SEG_NAME (SEG), ".stabstr", 8) == 0 \
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? 0 \
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: ((strncmp (SEG_NAME (SEG), ".stab", 5) == 0 \
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|| strcmp (SEG_NAME (SEG), ".ctors") == 0 \
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|| strcmp (SEG_NAME (SEG), ".dtors") == 0) \
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? 2 \
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: (sh_small ? 2 : 4)))
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#endif /* OBJ_COFF */
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#ifdef OBJ_ELF
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/* ELF specific definitions. */
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/* Whether or not the target is big endian */
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extern int target_big_endian;
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#ifdef TE_LINUX
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#define TARGET_FORMAT (!target_big_endian ? "elf32-sh-linux" : "elf32-shbig-linux")
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#elif defined(TE_NetBSD)
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#define TARGET_FORMAT (!target_big_endian ? "elf32-shl-nbsd" : "elf32-sh-nbsd")
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#elif defined TARGET_SYMBIAN
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#define TARGET_FORMAT (!target_big_endian ? "elf32-shl-symbian" : "elf32-sh-symbian")
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#elif defined (TE_VXWORKS)
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#define TARGET_FORMAT (!target_big_endian ? "elf32-shl-vxworks" : "elf32-sh-vxworks")
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#else
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#define TARGET_FORMAT (!target_big_endian ? "elf32-shl" : "elf32-sh")
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#endif
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#define elf_tc_final_processing sh_elf_final_processing
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extern void sh_elf_final_processing (void);
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#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
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#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
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/* This is the relocation type for direct references to
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GLOBAL_OFFSET_TABLE. It comes up in complicated expressions such
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as _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed
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normally with the regular expressions. The fixup specified here
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when used at runtime implies that we should add the address of the
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GOT to the specified location, and as a result we have simplified
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the expression into something we can use. */
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#define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_SH_GOTPC
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#define tc_fix_adjustable(FIX) sh_fix_adjustable(FIX)
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extern bfd_boolean sh_fix_adjustable (struct fix *);
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/* Values passed to md_apply_fix don't include symbol values. */
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#define MD_APPLY_SYM_VALUE(FIX) 0
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/* This expression evaluates to true if the relocation is for a local object
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for which we still want to do the relocation at runtime. False if we
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are willing to perform this relocation while building the .o file.
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We can't resolve references to the GOT or the PLT when creating the
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object file, since these tables are only created by the linker.
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Also, if the symbol is global, weak, common or not defined, the
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assembler can't compute the appropriate reloc, since its location
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can only be determined at link time. */
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#define TC_FORCE_RELOCATION_LOCAL(FIX) \
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(!(FIX)->fx_pcrel \
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|| (FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \
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|| (FIX)->fx_r_type == BFD_RELOC_32_GOT_PCREL \
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|| (FIX)->fx_r_type == BFD_RELOC_SH_GOTPC \
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|| TC_FORCE_RELOCATION (FIX))
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#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) (sh_relax && SWITCH_TABLE (FIX))
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/* This keeps the subtracted symbol around, for use by PLT_PCREL
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relocs. */
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#define TC_FORCE_RELOCATION_SUB_ABS(FIX) \
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((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL)
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/* Don't complain when we leave fx_subsy around. */
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#undef TC_VALIDATE_FIX_SUB
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#define TC_VALIDATE_FIX_SUB(FIX) \
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((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \
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|| (sh_relax && SWITCH_TABLE (FIX)))
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#define md_parse_name(name, exprP, mode, nextcharP) \
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sh_parse_name ((name), (exprP), (mode), (nextcharP))
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int sh_parse_name (char const *name, expressionS *exprP,
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enum expr_mode mode, char *nextchar);
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#define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP) \
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sh_cons_fix_new ((FRAG), (OFF), (LEN), (EXP))
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void sh_cons_fix_new (fragS *, int, int, expressionS *);
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/* This is used to construct expressions out of @GOTOFF, @PLT and @GOT
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symbols. The relocation type is stored in X_md. */
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#define O_PIC_reloc O_md1
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#define TARGET_USE_CFIPOP 1
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#define tc_cfi_frame_initial_instructions sh_cfi_frame_initial_instructions
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extern void sh_cfi_frame_initial_instructions (void);
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#define tc_regname_to_dw2regnum sh_regname_to_dw2regnum
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extern int sh_regname_to_dw2regnum (char *regname);
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/* All SH instructions are multiples of 16 bits. */
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#define DWARF2_LINE_MIN_INSN_LENGTH 2
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#define DWARF2_DEFAULT_RETURN_COLUMN 17
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#define DWARF2_CIE_DATA_ALIGNMENT (-4)
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#endif /* OBJ_ELF */
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