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binutils-gdb/gas/config/tc-ia64.h
Nick Clifton 9497f5ac6b This adjusts equate handling by 
- allowing true forward references (which will always assume the referenced
  symbols have at the point of use) through the new .eqv pseudo-op and the
  new == operator
- disallowing changing .equiv-generated equates (so that the protection this
  provides is both forward and backward)
- snapshotting equates when their value gets changed so that previous uses
  don't get affected by the new value.
- allowing expressions in places where absolute expressions (or register
  names) are needed which were not completely resolvable at the point of
  their definition but which are fully resolvable at the point of use

In addition it fixes PR/288.
2005-10-11 11:16:17 +00:00

320 lines
11 KiB
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/* tc-ia64.h -- Header file for tc-ia64.c.
Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
Free Software Foundation, Inc.
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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, 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
#include "opcode/ia64.h"
#include "elf/ia64.h"
#define TC_IA64
/* Linux is little endian by default. HPUX is big endian by default. */
#ifdef TE_HPUX
#define TARGET_BYTES_BIG_ENDIAN 1
#define MD_FLAGS_DEFAULT EF_IA_64_BE
#else
#define TARGET_BYTES_BIG_ENDIAN 0
#define MD_FLAGS_DEFAULT EF_IA_64_ABI64
#endif /* TE_HPUX */
extern void (*ia64_number_to_chars) PARAMS ((char *, valueT, int));
#define md_number_to_chars (*ia64_number_to_chars)
extern void ia64_elf_section_change_hook PARAMS ((void));
#define md_elf_section_change_hook ia64_elf_section_change_hook
/* We record the endian for this section. 0 means default, 1 means
big endian and 2 means little endian. */
struct ia64_segment_info_type
{
unsigned int endian : 2;
};
#define TC_SEGMENT_INFO_TYPE struct ia64_segment_info_type
extern void ia64_adjust_symtab PARAMS ((void));
#define tc_adjust_symtab() ia64_adjust_symtab ()
extern void ia64_frob_file PARAMS ((void));
#define tc_frob_file() ia64_frob_file ()
/* We need to set the default object file format in ia64_init and not in
md_begin. This is because parse_args is called before md_begin, and we
do not want md_begin to wipe out the flag settings set by options parsed in
md_parse_args. */
#define HOST_SPECIAL_INIT ia64_init
extern void ia64_init PARAMS ((int, char **));
#define TARGET_FORMAT ia64_target_format()
extern const char *ia64_target_format PARAMS ((void));
#define TARGET_ARCH bfd_arch_ia64
#define DOUBLESLASH_LINE_COMMENTS /* allow //-style comments */
#define NEED_LITERAL_POOL /* need gp literal pool */
#define RELOC_REQUIRES_SYMBOL
#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
#define NEED_INDEX_OPERATOR /* [ ] is index operator */
#define QUOTES_IN_INSN /* allow `string "foo;bar"' */
#define LEX_AT (LEX_NAME|LEX_BEGIN_NAME) /* allow `@' inside name */
#define LEX_QM (LEX_NAME|LEX_BEGIN_NAME) /* allow `?' inside name */
#define LEX_HASH LEX_END_NAME /* allow `#' ending a name */
extern const char ia64_symbol_chars[];
#define tc_symbol_chars ia64_symbol_chars
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
struct ia64_fix
{
int bigendian; /* byte order at fix location */
enum ia64_opnd opnd;
};
extern void ia64_end_of_source PARAMS((void));
extern void ia64_start_line PARAMS((void));
extern int ia64_unrecognized_line PARAMS((int ch));
extern void ia64_frob_label PARAMS((struct symbol *sym));
#ifdef TE_HPUX
extern int ia64_frob_symbol PARAMS((struct symbol *sym));
#endif
extern void ia64_flush_pending_output PARAMS((void));
extern int ia64_parse_name PARAMS((char *name, expressionS *e, char *nextP));
extern int ia64_optimize_expr PARAMS((expressionS *l, operatorT op,
expressionS *r));
extern void ia64_cons_align PARAMS((int));
extern void ia64_flush_insns PARAMS((void));
extern int ia64_fix_adjustable PARAMS((struct fix *fix));
extern int ia64_force_relocation PARAMS((struct fix *));
extern void ia64_cons_fix_new PARAMS ((fragS *f, int where, int nbytes,
expressionS *exp));
extern void ia64_validate_fix PARAMS ((struct fix *fix));
extern char * ia64_canonicalize_symbol_name PARAMS ((char *));
extern int ia64_elf_section_letter PARAMS ((int, char **));
extern flagword ia64_elf_section_flags PARAMS ((flagword, int, int));
extern int ia64_elf_section_type PARAMS ((const char *, size_t len));
extern long ia64_pcrel_from_section PARAMS ((struct fix *fix, segT sec));
extern void ia64_md_do_align PARAMS ((int, const char *, int, int));
extern void ia64_handle_align PARAMS ((fragS *f));
extern void ia64_after_parse_args PARAMS ((void));
extern void ia64_dwarf2_emit_offset PARAMS ((symbolS *, unsigned int));
extern void ia64_check_label PARAMS ((symbolS *));
extern int ia64_estimate_size_before_relax (fragS *, asection *);
extern void ia64_convert_frag (fragS *);
#define md_end() ia64_end_of_source ()
#define md_start_line_hook() ia64_start_line ()
#define tc_unrecognized_line(ch) ia64_unrecognized_line (ch)
#define tc_frob_label(s) ia64_frob_label (s)
#ifdef TE_HPUX
#define tc_frob_symbol(s,p) p |= ia64_frob_symbol (s)
#endif /* TE_HPUX */
#define md_flush_pending_output() ia64_flush_pending_output ()
#define md_parse_name(s,e,m,c) ia64_parse_name (s, e, c)
#define tc_canonicalize_symbol_name(s) ia64_canonicalize_symbol_name (s)
#define tc_canonicalize_section_name(s) ia64_canonicalize_symbol_name (s)
#define md_optimize_expr(l,o,r) ia64_optimize_expr (l, o, r)
#define md_cons_align(n) ia64_cons_align (n)
#define TC_FORCE_RELOCATION(f) ia64_force_relocation (f)
#define tc_fix_adjustable(f) ia64_fix_adjustable (f)
#define MD_APPLY_SYM_VALUE(FIX) 0
#define md_convert_frag(b,s,f) ia64_convert_frag (f)
#define md_create_long_jump(p,f,t,fr,s) as_fatal ("ia64_create_long_jump")
#define md_create_short_jump(p,f,t,fr,s) \
as_fatal ("ia64_create_short_jump")
#define md_estimate_size_before_relax(f,s) \
ia64_estimate_size_before_relax(f,s)
#define md_elf_section_letter ia64_elf_section_letter
#define md_elf_section_flags ia64_elf_section_flags
#define TC_FIX_TYPE struct ia64_fix
#define TC_INIT_FIX_DATA(f) { f->tc_fix_data.opnd = 0; }
#define TC_CONS_FIX_NEW(f,o,l,e) ia64_cons_fix_new (f, o, l, e)
#define TC_VALIDATE_FIX(fix,seg,skip) ia64_validate_fix (fix)
#define MD_PCREL_FROM_SECTION(fix,sec) ia64_pcrel_from_section (fix, sec)
#define md_section_align(seg,size) (size)
#define md_do_align(n,f,l,m,j) ia64_md_do_align (n,f,l,m)
#define HANDLE_ALIGN(f) ia64_handle_align (f)
#define md_elf_section_type(str,len) ia64_elf_section_type (str, len)
#define md_after_parse_args() ia64_after_parse_args ()
#define TC_DWARF2_EMIT_OFFSET ia64_dwarf2_emit_offset
#define tc_check_label(l) ia64_check_label (l)
/* Record if an alignment frag should end with a stop bit. */
#define TC_FRAG_TYPE int
#define TC_FRAG_INIT(FRAGP) do {(FRAGP)->tc_frag_data = 0;}while (0)
/* Give an error if a frag containing code is not aligned to a 16 byte
boundary. */
#define md_frag_check(FRAGP) \
if ((FRAGP)->has_code \
&& (((FRAGP)->fr_address + (FRAGP)->insn_addr) & 15) != 0) \
as_bad_where ((FRAGP)->fr_file, (FRAGP)->fr_line, \
_("instruction address is not a multiple of 16"));
#define MAX_MEM_FOR_RS_ALIGN_CODE (15 + 16)
#define WORKING_DOT_WORD /* don't do broken word processing for now */
#define DWARF2_LINE_MIN_INSN_LENGTH 1 /* so slot-multipliers can be 1 */
/* This is the information required for unwind records in an ia64
object file. This is required by GAS and the compiler runtime. */
/* These are the starting point masks for the various types of
unwind records. To create a record of type R3 for instance, one
starts by using the value UNW_R3 and or-ing in any other required values.
These values are also unique (in context), so they can be used to identify
the various record types as well. UNW_Bx and some UNW_Px do have the
same value, but Px can only occur in a prologue context, and Bx in
a body context. */
#define UNW_R1 0x00
#define UNW_R2 0x40
#define UNW_R3 0x60
#define UNW_P1 0x80
#define UNW_P2 0xA0
#define UNW_P3 0xB0
#define UNW_P4 0xB8
#define UNW_P5 0xB9
#define UNW_P6 0xC0
#define UNW_P7 0xE0
#define UNW_P8 0xF0
#define UNW_P9 0xF1
#define UNW_P10 0xFF
#define UNW_X1 0xF9
#define UNW_X2 0xFA
#define UNW_X3 0xFB
#define UNW_X4 0xFC
#define UNW_B1 0x80
#define UNW_B2 0xC0
#define UNW_B3 0xE0
#define UNW_B4 0xF0
/* These are all the various types of unwind records. */
typedef enum
{
prologue, prologue_gr, body, mem_stack_f, mem_stack_v, psp_gr, psp_sprel,
rp_when, rp_gr, rp_br, rp_psprel, rp_sprel, pfs_when, pfs_gr, pfs_psprel,
pfs_sprel, preds_when, preds_gr, preds_psprel, preds_sprel,
fr_mem, frgr_mem, gr_gr, gr_mem, br_mem, br_gr, spill_base, spill_mask,
unat_when, unat_gr, unat_psprel, unat_sprel, lc_when, lc_gr, lc_psprel,
lc_sprel, fpsr_when, fpsr_gr, fpsr_psprel, fpsr_sprel,
priunat_when_gr, priunat_when_mem, priunat_gr, priunat_psprel,
priunat_sprel, bsp_when, bsp_gr, bsp_psprel, bsp_sprel, bspstore_when,
bspstore_gr, bspstore_psprel, bspstore_sprel, rnat_when, rnat_gr,
rnat_psprel, rnat_sprel, epilogue, label_state, copy_state,
spill_psprel, spill_sprel, spill_reg, spill_psprel_p, spill_sprel_p,
spill_reg_p, unwabi, endp
} unw_record_type;
/* These structures declare the fields that can be used in each of the
4 record formats, R, P, B and X. */
typedef struct unw_r_record
{
unsigned long rlen;
unsigned short grmask;
unsigned short grsave;
/* masks to represent the union of save.g, save.f, save.b, and
save.gf: */
unsigned long imask_size;
struct
{
unsigned char *i;
unsigned int fr_mem;
unsigned char gr_mem;
unsigned char br_mem;
} mask;
} unw_r_record;
typedef struct unw_p_record
{
struct unw_rec_list *next;
unsigned long t;
unsigned long size;
union
{
unsigned long sp;
unsigned long psp;
} off;
union
{
unsigned short gr;
unsigned short br;
} r;
unsigned char grmask;
unsigned char brmask;
unsigned int frmask;
unsigned char abi;
unsigned char context;
} unw_p_record;
typedef struct unw_b_record
{
unsigned long t;
unsigned long label;
unsigned short ecount;
} unw_b_record;
typedef struct unw_x_record
{
unsigned long t;
union
{
unsigned long spoff;
unsigned long pspoff;
unsigned int reg;
} where;
unsigned short reg;
unsigned short qp;
unsigned short ab; /* Value of the AB field.. */
unsigned short xy; /* Value of the XY field.. */
} unw_x_record;
/* This structure is used to determine the specific record type and
its fields. */
typedef struct unwind_record
{
unw_record_type type;
union {
unw_r_record r;
unw_p_record p;
unw_b_record b;
unw_x_record x;
} record;
} unwind_record;
/* This expression evaluates to true if the relocation is for a local
object for which we still want to do the relocation at runtime.
False if we are willing to perform this relocation while building
the .o file. */
/* If the reloc type is BFD_RELOC_UNUSED, then this is for a TAG13/TAG13b field
which has no external reloc, so we must resolve the value now. */
#define TC_FORCE_RELOCATION_LOCAL(FIX) \
((FIX)->fx_r_type != BFD_RELOC_UNUSED \
&& (!(FIX)->fx_pcrel \
|| (FIX)->fx_plt \
|| TC_FORCE_RELOCATION (FIX)))
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