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Diffstat (limited to 'gas/write.h')
| -rw-r--r-- | gas/write.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/gas/write.h b/gas/write.h new file mode 100644 index 0000000..186d2ad --- /dev/null +++ b/gas/write.h @@ -0,0 +1,208 @@ +/* write.h + Copyright (C) 1987, 92, 93, 94, 95, 96, 1997 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. */ + +#ifndef __write_h__ +#define __write_h__ + +#ifndef TC_I960 +#ifdef hpux +#define EXEC_MACHINE_TYPE HP9000S200_ID +#endif +#endif /* TC_I960 */ + +#ifndef BFD_ASSEMBLER + +#ifndef LOCAL_LABEL +#define LOCAL_LABEL(name) (name [0] == 'L' ) +#endif + +#define S_LOCAL_NAME(s) (LOCAL_LABEL (S_GET_NAME (s))) + +#endif /* ! BFD_ASSEMBLER */ + +/* This is the name of a fake symbol which will never appear in the + assembler output. S_IS_LOCAL detects it because of the \001. */ +#define FAKE_LABEL_NAME "L0\001" + +#include "bit_fix.h" + +/* + * FixSs may be built up in any order. + */ + +struct fix +{ + /* These small fields are grouped together for compactness of + this structure, and efficiency of access on some architectures. */ + + /* pc-relative offset adjust (only used by m68k) */ + char fx_pcrel_adjust; + + /* How many bytes are involved? */ + unsigned char fx_size; + + /* Is this a pc-relative relocation? */ + unsigned fx_pcrel : 1; + + /* Is this a relocation to a procedure linkage table entry? If so, + some of the reductions we try to apply are invalid. A better way + might be to represent PLT entries with different kinds of + symbols, and use normal relocations (with undefined symbols); + look into it for version 2.6. */ + unsigned fx_plt : 1; + + /* Is this value an immediate displacement? */ + /* Only used on i960 and ns32k; merge it into TC_FIX_TYPE sometime. */ + unsigned fx_im_disp : 2; + + /* A bit for the CPU specific code. + This probably can be folded into tc_fix_data, below. */ + unsigned fx_tcbit : 1; + + /* Has this relocation already been applied? */ + unsigned fx_done : 1; + + /* Suppress overflow complaints on large addends. This is used + in the PowerPC ELF config to allow large addends on the + BFD_RELOC_{LO16,HI16,HI16_S} relocations. + + @@ Can this be determined from BFD? */ + unsigned fx_no_overflow : 1; + + /* The value is signed when checking for overflow. */ + unsigned fx_signed : 1; + + /* Which frag does this fix apply to? */ + fragS *fx_frag; + + /* Where is the first byte to fix up? */ + long fx_where; + + /* NULL or Symbol whose value we add in. */ + symbolS *fx_addsy; + + /* NULL or Symbol whose value we subtract. */ + symbolS *fx_subsy; + + /* Absolute number we add in. */ + valueT fx_offset; + + /* Next fixS in linked list, or NULL. */ + struct fix *fx_next; + + /* If NULL, no bitfix's to do. */ + /* Only i960-coff and ns32k use this, and i960-coff stores an + integer. This can probably be folded into tc_fix_data, below. + @@ Alpha also uses it, but only to disable certain relocation + processing. */ + bit_fixS *fx_bit_fixP; + +#ifdef BFD_ASSEMBLER + bfd_reloc_code_real_type fx_r_type; +#else +#ifdef NEED_FX_R_TYPE + /* Hack for machines where the type of reloc can't be + worked out by looking at how big it is. */ + int fx_r_type; +#endif +#endif + + /* This field is sort of misnamed. It appears to be a sort of random + scratch field, for use by the back ends. The main gas code doesn't + do anything but initialize it to zero. The use of it does need to + be coordinated between the cpu and format files, though. E.g., some + coff targets pass the `addend' field from the cpu file via this + field. I don't know why the `fx_offset' field above can't be used + for that; investigate later and document. KR */ + valueT fx_addnumber; + + /* The location of the instruction which created the reloc, used + in error messages. */ + char *fx_file; + unsigned fx_line; + +#ifdef USING_CGEN + struct { + /* CGEN_INSN entry for this instruction. */ + const struct cgen_insn *insn; + /* Target specific data, usually reloc number. */ + int opinfo; + } fx_cgen; +#endif + +#ifdef TC_FIX_TYPE + /* Location where a backend can attach additional data + needed to perform fixups. */ + TC_FIX_TYPE tc_fix_data; +#endif +}; + +typedef struct fix fixS; + +#ifndef BFD_ASSEMBLER +extern char *next_object_file_charP; + +#ifndef MANY_SEGMENTS +COMMON fixS *text_fix_root, *text_fix_tail; /* Chains fixSs. */ +COMMON fixS *data_fix_root, *data_fix_tail; /* Chains fixSs. */ +COMMON fixS *bss_fix_root, *bss_fix_tail; /* Chains fixSs. */ +extern struct frag *text_last_frag; /* Last frag in segment. */ +extern struct frag *data_last_frag; /* Last frag in segment. */ +#endif +COMMON fixS **seg_fix_rootP, **seg_fix_tailP; /* -> one of above. */ +#endif + +extern long string_byte_count; +extern int section_alignment[]; + +extern bit_fixS *bit_fix_new + PARAMS ((int size, int offset, long base_type, long base_adj, long min, + long max, long add)); +extern void append PARAMS ((char **charPP, char *fromP, unsigned long length)); +extern void record_alignment PARAMS ((segT seg, int align)); +extern void subsegs_finish PARAMS ((void)); +extern void write_object_file PARAMS ((void)); +extern long relax_frag PARAMS ((fragS *, long)); +extern void relax_segment + PARAMS ((struct frag * seg_frag_root, segT seg_type)); + +extern void number_to_chars_littleendian PARAMS ((char *, valueT, int)); +extern void number_to_chars_bigendian PARAMS ((char *, valueT, int)); + +#ifdef BFD_ASSEMBLER +extern fixS *fix_new + PARAMS ((fragS * frag, int where, int size, symbolS * add_symbol, + offsetT offset, int pcrel, bfd_reloc_code_real_type r_type)); +extern fixS *fix_new_exp + PARAMS ((fragS * frag, int where, int size, expressionS *exp, int pcrel, + bfd_reloc_code_real_type r_type)); +#else +extern fixS *fix_new + PARAMS ((fragS * frag, int where, int size, symbolS * add_symbol, + offsetT offset, int pcrel, int r_type)); +extern fixS *fix_new_exp + PARAMS ((fragS * frag, int where, int size, expressionS *exp, int pcrel, + int r_type)); +#endif + +extern void write_print_statistics PARAMS ((FILE *)); + +#endif /* __write_h__ */ +/* end of write.h */ |