212 lines
6.5 KiB
C
212 lines
6.5 KiB
C
/* write.h
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Copyright 1987, 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001
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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 2, 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 the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#ifndef __write_h__
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#define __write_h__
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#ifndef TC_I960
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#ifdef hpux
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#define EXEC_MACHINE_TYPE HP9000S200_ID
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#endif
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#endif /* TC_I960 */
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#ifndef BFD_ASSEMBLER
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#ifndef LOCAL_LABEL
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#define LOCAL_LABEL(name) (name [0] == 'L' )
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#endif
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#define S_LOCAL_NAME(s) (LOCAL_LABEL (S_GET_NAME (s)))
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#endif /* ! BFD_ASSEMBLER */
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/* This is the name of a fake symbol which will never appear in the
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assembler output. S_IS_LOCAL detects it because of the \001. */
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#define FAKE_LABEL_NAME "L0\001"
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#include "bit_fix.h"
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/*
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* FixSs may be built up in any order.
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*/
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struct fix
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{
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/* These small fields are grouped together for compactness of
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this structure, and efficiency of access on some architectures. */
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/* pc-relative offset adjust (only used by m68k) */
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char fx_pcrel_adjust;
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/* How many bytes are involved? */
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unsigned char fx_size;
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/* Is this a pc-relative relocation? */
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unsigned fx_pcrel : 1;
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/* Is this a relocation to a procedure linkage table entry? If so,
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some of the reductions we try to apply are invalid. A better way
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might be to represent PLT entries with different kinds of
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symbols, and use normal relocations (with undefined symbols);
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look into it for version 2.6. */
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unsigned fx_plt : 1;
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/* Is this value an immediate displacement? */
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/* Only used on i960 and ns32k; merge it into TC_FIX_TYPE sometime. */
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unsigned fx_im_disp : 2;
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/* A bit for the CPU specific code.
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This probably can be folded into tc_fix_data, below. */
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unsigned fx_tcbit : 1;
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/* Has this relocation already been applied? */
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unsigned fx_done : 1;
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/* Suppress overflow complaints on large addends. This is used
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in the PowerPC ELF config to allow large addends on the
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BFD_RELOC_{LO16,HI16,HI16_S} relocations.
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@@ Can this be determined from BFD? */
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unsigned fx_no_overflow : 1;
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/* The value is signed when checking for overflow. */
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unsigned fx_signed : 1;
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/* Which frag does this fix apply to? */
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fragS *fx_frag;
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/* Where is the first byte to fix up? */
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long fx_where;
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/* NULL or Symbol whose value we add in. */
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symbolS *fx_addsy;
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/* NULL or Symbol whose value we subtract. */
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symbolS *fx_subsy;
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/* Absolute number we add in. */
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valueT fx_offset;
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/* Next fixS in linked list, or NULL. */
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struct fix *fx_next;
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/* If NULL, no bitfix's to do. */
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/* Only i960-coff and ns32k use this, and i960-coff stores an
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integer. This can probably be folded into tc_fix_data, below.
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@@ Alpha also uses it, but only to disable certain relocation
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processing. */
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bit_fixS *fx_bit_fixP;
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#ifdef BFD_ASSEMBLER
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bfd_reloc_code_real_type fx_r_type;
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#else
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#ifdef NEED_FX_R_TYPE
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/* Hack for machines where the type of reloc can't be
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worked out by looking at how big it is. */
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int fx_r_type;
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#endif
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#endif
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/* This field is sort of misnamed. It appears to be a sort of random
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scratch field, for use by the back ends. The main gas code doesn't
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do anything but initialize it to zero. The use of it does need to
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be coordinated between the cpu and format files, though. E.g., some
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coff targets pass the `addend' field from the cpu file via this
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field. I don't know why the `fx_offset' field above can't be used
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for that; investigate later and document. KR */
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valueT fx_addnumber;
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/* The location of the instruction which created the reloc, used
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in error messages. */
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char *fx_file;
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unsigned fx_line;
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#ifdef USING_CGEN
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struct {
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/* CGEN_INSN entry for this instruction. */
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const struct cgen_insn *insn;
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/* Target specific data, usually reloc number. */
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int opinfo;
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} fx_cgen;
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#endif
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#ifdef TC_FIX_TYPE
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/* Location where a backend can attach additional data
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needed to perform fixups. */
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TC_FIX_TYPE tc_fix_data;
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#endif
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};
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typedef struct fix fixS;
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extern int finalize_syms;
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extern symbolS *abs_section_sym;
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#ifndef BFD_ASSEMBLER
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extern char *next_object_file_charP;
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#ifndef MANY_SEGMENTS
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COMMON fixS *text_fix_root, *text_fix_tail; /* Chains fixSs. */
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COMMON fixS *data_fix_root, *data_fix_tail; /* Chains fixSs. */
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COMMON fixS *bss_fix_root, *bss_fix_tail; /* Chains fixSs. */
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extern struct frag *text_last_frag; /* Last frag in segment. */
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extern struct frag *data_last_frag; /* Last frag in segment. */
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#endif
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COMMON fixS **seg_fix_rootP, **seg_fix_tailP; /* -> one of above. */
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#endif
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extern long string_byte_count;
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extern int section_alignment[];
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extern bit_fixS *bit_fix_new
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PARAMS ((int size, int offset, long base_type, long base_adj, long min,
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long max, long add));
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extern void append PARAMS ((char **charPP, char *fromP, unsigned long length));
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extern void record_alignment PARAMS ((segT seg, int align));
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extern int get_recorded_alignment PARAMS ((segT seg));
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extern void subsegs_finish PARAMS ((void));
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extern void write_object_file PARAMS ((void));
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extern long relax_frag PARAMS ((segT, fragS *, long));
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extern int relax_segment
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PARAMS ((struct frag * seg_frag_root, segT seg_type));
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extern void number_to_chars_littleendian PARAMS ((char *, valueT, int));
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extern void number_to_chars_bigendian PARAMS ((char *, valueT, int));
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#ifdef BFD_ASSEMBLER
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extern fixS *fix_new
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PARAMS ((fragS * frag, int where, int size, symbolS * add_symbol,
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offsetT offset, int pcrel, bfd_reloc_code_real_type r_type));
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extern fixS *fix_new_exp
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PARAMS ((fragS * frag, int where, int size, expressionS *exp, int pcrel,
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bfd_reloc_code_real_type r_type));
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#else
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extern fixS *fix_new
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PARAMS ((fragS * frag, int where, int size, symbolS * add_symbol,
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offsetT offset, int pcrel, int r_type));
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extern fixS *fix_new_exp
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PARAMS ((fragS * frag, int where, int size, expressionS *exp, int pcrel,
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int r_type));
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#endif
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extern void write_print_statistics PARAMS ((FILE *));
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#endif /* __write_h__ */
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