X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gas%2Fwrite.h;h=b6132dd5f5238637d62d2f33b33bc913680c05b5;hb=c2e5c986b3825c16a578e5bf84aa412eec276dc7;hp=d3f307200921c05ba47c7ae7d63c42511f8ee4b6;hpb=a39116f1c91d3642c068d9df871338cca9006be2;p=deliverable%2Fbinutils-gdb.git diff --git a/gas/write.h b/gas/write.h index d3f3072009..b6132dd5f5 100644 --- a/gas/write.h +++ b/gas/write.h @@ -1,131 +1,188 @@ -/* write.h -> write.c */ +/* write.h + Copyright (C) 1987-2020 Free Software Foundation, Inc. -/* MODIFIED BY CHRIS BENENATI, FOR INTEL CORPORATION, 4/89 */ -/* write.h -> write.c - Copyright (C) 1987 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) + the Free Software Foundation; either version 3, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ + 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. */ + +#ifndef __write_h__ +#define __write_h__ -#ifndef TC_I960 -#ifdef hpux -#define EXEC_MACHINE_TYPE HP9000S200_ID +/* 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. */ +#ifndef FAKE_LABEL_NAME +#define FAKE_LABEL_NAME "L0\001" #endif -#endif /* TC_I960 */ - -#ifndef LOCAL_LABEL -#ifdef DOT_LABEL_PREFIX -#define LOCAL_LABEL(name) (name[0] =='.' \ - && ( name [1] == 'L' || name [1] == '.' )) -#else /* not defined DOT_LABEL_PREFIX */ -#define LOCAL_LABEL(name) (name [0] == 'L' ) -#endif /* not defined DOT_LABEL_PREFIX */ -#endif /* LOCAL_LABEL */ - -#define S_LOCAL_NAME(s) (LOCAL_LABEL(S_GET_NAME(s))) - -/* The bit_fix was implemented to support machines that need variables - to be inserted in bitfields other than 1, 2 and 4 bytes. - Furthermore it gives us a possibillity to mask in bits in the symbol - when it's fixed in the objectcode and check the symbols limits. - - The or-mask is used to set the huffman bits in displacements for the - ns32k port. - The acbi, addqi, movqi, cmpqi instruction requires an assembler that - can handle bitfields. Ie handle an expression, evaluate it and insert - the result in an some bitfield. ( ex: 5 bits in a short field of a opcode) - */ - -struct bit_fix { - int fx_bit_size; /* Length of bitfield */ - int fx_bit_offset; /* Bit offset to bitfield */ - long fx_bit_base; /* Where do we apply the bitfix. - If this is zero, default is assumed. */ - long fx_bit_base_adj;/* Adjustment of base */ - long fx_bit_max; /* Signextended max for bitfield */ - long fx_bit_min; /* Signextended min for bitfield */ - long fx_bit_add; /* Or mask, used for huffman prefix */ -}; -typedef struct bit_fix bit_fixS; + +/* This is a special character that is used to indicate a fake label. + It must be present in FAKE_LABEL_NAME, although it does not have to + be the first character. It must not be a character that would be + found in a valid symbol name. + + Also be aware that the function _bfd_elf_is_local_label_name in + bfd/elf.c has an implicit assumption that FAKE_LABEL_CHAR is '\001'. + If this is not the case then FAKE_LABEL_NAME must start with ".L" in + order for the function to continue working. */ +#ifndef FAKE_LABEL_CHAR +#define FAKE_LABEL_CHAR '\001' +#endif + /* * FixSs may be built up in any order. */ -struct fix { - fragS *fx_frag; /* Which frag? */ - long fx_where; /* Where is the 1st byte to fix up? */ - symbolS *fx_addsy; /* NULL or Symbol whose value we add in. */ - symbolS *fx_subsy; /* NULL or Symbol whose value we subtract. */ - long fx_offset; /* Absolute number we add in. */ - struct fix *fx_next; /* NULL or -> next fixS. */ - short int fx_size; /* How many bytes are involved? */ - char fx_pcrel; /* TRUE: pc-relative. */ - char fx_pcrel_adjust;/* pc-relative offset adjust */ - char fx_im_disp; /* TRUE: value is a displacement */ - bit_fixS *fx_bit_fixP; /* IF NULL no bitfix's to do */ - char fx_bsr; /* sequent-hack */ - enum reloc_type fx_r_type; /* Sparc hacks */ - char fx_callj; /* TRUE if target is a 'callj' - (used by i960) */ - long fx_addnumber; -}; +struct fix +{ + /* Next fixS in linked list, or NULL. */ + struct fix *fx_next; -typedef struct fix fixS; + /* These small fields are grouped together for compactness of + this structure, and efficiency of access on some architectures. */ -COMMON char *next_object_file_charP; + /* Is this a pc-relative relocation? */ + unsigned fx_pcrel : 1; -#ifndef MANY_SEGMENTS -COMMON fixS *text_fix_root, *text_fix_tail; /* Chains fixSs. */ -COMMON fixS *data_fix_root, *data_fix_tail; /* Chains fixSs. */ -#endif -COMMON fixS **seg_fix_rootP, **seg_fix_tailP; /* -> one of above. */ -extern long string_byte_count; -extern int section_alignment[]; + /* Has this relocation already been applied? */ + unsigned fx_done : 1; -#ifdef __STDC__ + /* 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. -bit_fixS *bit_fix_new(char size, char offset, long base_type, long base_adj, long min, long max, long add); -void append(char **charPP, char *fromP, unsigned long length); -void record_alignment(segT seg, int align); -void write_object_file(void); + @@ Can this be determined from BFD? */ + unsigned fx_no_overflow : 1; -fixS *fix_new(fragS *frag, - int where, - int size, - symbolS *add_symbol, - symbolS *sub_symbol, - long offset, - int pcrel, - enum reloc_type r_type); + /* The value is signed when checking for overflow. */ + unsigned fx_signed : 1; -#else + /* Some bits for the CPU specific code. */ + unsigned fx_tcbit : 1; + unsigned fx_tcbit2 : 1; -bit_fixS *bit_fix_new(); -fixS *fix_new(); -void append(); -void record_alignment(); -void write_object_file(); + /* Spare bits. */ + unsigned fx_unused : 10; -#endif /* __STDC__ */ + /* pc-relative offset adjust (only used by some CPU specific code) */ + int fx_pcrel_adjust : 8; -/* - * Local Variables: - * comment-column: 0 - * fill-column: 131 - * End: - */ + /* How many bytes are involved? */ + unsigned fx_size : 8; + + bfd_reloc_code_real_type fx_r_type; + + /* Which frag does this fix apply to? */ + fragS *fx_frag; + + /* The location within the frag where the fixup occurs. */ + unsigned 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; + + /* The value of dot when the fixup expression was parsed. */ + addressT fx_dot_value; + + /* The frag fx_dot_value is based on. */ + fragS *fx_dot_frag; + + /* 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. */ + const 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; + /* Which ifield this fixup applies to. */ + struct cgen_maybe_multi_ifield * field; + /* is this field is the MSB field in a set? */ + int msb_field_p; + } 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; + +struct reloc_list +{ + struct reloc_list *next; + union + { + struct + { + symbolS *offset_sym; + reloc_howto_type *howto; + symbolS *sym; + bfd_vma addend; + } a; + struct + { + asection *sec; + asymbol *s; + arelent r; + } b; + } u; + const char *file; + unsigned int line; +}; -/* end of write.h */ +extern int finalize_syms; +extern symbolS *abs_section_sym; +extern addressT dot_value; +extern fragS *dot_frag; +extern struct reloc_list* reloc_list; + +extern void append (char **, char *, unsigned long); +extern void record_alignment (segT, unsigned); +extern int get_recorded_alignment (segT); +extern void write_object_file (void); +extern long relax_frag (segT, fragS *, long); +extern int relax_segment (struct frag *, segT, int); +extern void number_to_chars_littleendian (char *, valueT, int); +extern void number_to_chars_bigendian (char *, valueT, int); +extern fixS *fix_new (fragS *, unsigned long, unsigned long, symbolS *, + offsetT, int, bfd_reloc_code_real_type); +extern fixS *fix_at_start (fragS *, unsigned long, symbolS *, + offsetT, int, bfd_reloc_code_real_type); +extern fixS *fix_new_exp (fragS *, unsigned long, unsigned long, + expressionS *, int, bfd_reloc_code_real_type); +extern void write_print_statistics (FILE *); + +#endif /* __write_h__ */