/* outaout.c output routines for the Netwide Assembler to produce * Linux a.out object files * * The Netwide Assembler is copyright (C) 1996 Simon Tatham and * Julian Hall. All rights reserved. The software is * redistributable under the licence given in the file "Licence" * distributed in the NASM archive. */ #include #include #include #include #include #include "nasm.h" #include "nasmlib.h" #include "stdscan.h" #include "outform.h" #if defined OF_AOUT || defined OF_AOUTB #define RELTYPE_ABSOLUTE 0x00 #define RELTYPE_RELATIVE 0x01 #define RELTYPE_GOTPC 0x01 /* no explicit GOTPC in a.out */ #define RELTYPE_GOTOFF 0x10 #define RELTYPE_GOT 0x10 /* distinct from GOTOFF bcos sym not sect */ #define RELTYPE_PLT 0x21 #define RELTYPE_SYMFLAG 0x08 struct Reloc { struct Reloc *next; int32_t address; /* relative to _start_ of section */ int32_t symbol; /* symbol number or -ve section id */ int bytes; /* 2 or 4 */ int reltype; /* see above */ }; struct Symbol { int32_t strpos; /* string table position of name */ int type; /* symbol type - see flags below */ int32_t value; /* address, or COMMON variable size */ int32_t size; /* size for data or function exports */ int32_t segment; /* back-reference used by gsym_reloc */ struct Symbol *next; /* list of globals in each section */ struct Symbol *nextfwd; /* list of unresolved-size symbols */ char *name; /* for unresolved-size symbols */ int32_t symnum; /* index into symbol table */ }; /* * Section IDs - used in Reloc.symbol when negative, and in * Symbol.type when positive. */ #define SECT_ABS 2 /* absolute value */ #define SECT_TEXT 4 /* text section */ #define SECT_DATA 6 /* data section */ #define SECT_BSS 8 /* bss section */ #define SECT_MASK 0xE /* mask out any of the above */ /* * More flags used in Symbol.type. */ #define SYM_GLOBAL 1 /* it's a global symbol */ #define SYM_DATA 0x100 /* used for shared libs */ #define SYM_FUNCTION 0x200 /* used for shared libs */ #define SYM_WITH_SIZE 0x4000 /* not output; internal only */ /* * Bit more explanation of symbol types: SECT_xxx denotes a local * symbol. SECT_xxx|SYM_GLOBAL denotes a global symbol, defined in * this module. Just SYM_GLOBAL, with zero value, denotes an * external symbol referenced in this module. And just SYM_GLOBAL, * but with a non-zero value, declares a C `common' variable, of * size `value'. */ struct Section { struct SAA *data; uint32_t len, size, nrelocs; int32_t index; struct Reloc *head, **tail; struct Symbol *gsyms, *asym; }; static struct Section stext, sdata, sbss; static struct SAA *syms; static uint32_t nsyms; static struct RAA *bsym; static struct SAA *strs; static uint32_t strslen; static struct Symbol *fwds; static FILE *aoutfp; static efunc error; static evalfunc evaluate; static int bsd; static int is_pic; static void aout_write(void); static void aout_write_relocs(struct Reloc *); static void aout_write_syms(void); static void aout_sect_write(struct Section *, const uint8_t *, uint32_t); static void aout_pad_sections(void); static void aout_fixup_relocs(struct Section *); /* * Special section numbers which are used to define special * symbols, which can be used with WRT to provide PIC relocation * types. */ static int32_t aout_gotpc_sect, aout_gotoff_sect; static int32_t aout_got_sect, aout_plt_sect; static int32_t aout_sym_sect; static void aoutg_init(FILE * fp, efunc errfunc, ldfunc ldef, evalfunc eval) { aoutfp = fp; error = errfunc; evaluate = eval; (void)ldef; /* placate optimisers */ stext.data = saa_init(1L); stext.head = NULL; stext.tail = &stext.head; sdata.data = saa_init(1L); sdata.head = NULL; sdata.tail = &sdata.head; stext.len = stext.size = sdata.len = sdata.size = sbss.len = 0; stext.nrelocs = sdata.nrelocs = 0; stext.gsyms = sdata.gsyms = sbss.gsyms = NULL; stext.index = seg_alloc(); sdata.index = seg_alloc(); sbss.index = seg_alloc(); stext.asym = sdata.asym = sbss.asym = NULL; syms = saa_init((int32_t)sizeof(struct Symbol)); nsyms = 0; bsym = raa_init(); strs = saa_init(1L); strslen = 0; fwds = NULL; } #ifdef OF_AOUT static void aout_init(FILE * fp, efunc errfunc, ldfunc ldef, evalfunc eval) { bsd = FALSE; aoutg_init(fp, errfunc, ldef, eval); aout_gotpc_sect = aout_gotoff_sect = aout_got_sect = aout_plt_sect = aout_sym_sect = NO_SEG; } #endif #ifdef OF_AOUTB extern struct ofmt of_aoutb; static void aoutb_init(FILE * fp, efunc errfunc, ldfunc ldef, evalfunc eval) { bsd = TRUE; aoutg_init(fp, errfunc, ldef, eval); is_pic = 0x00; /* may become 0x40 */ aout_gotpc_sect = seg_alloc(); ldef("..gotpc", aout_gotpc_sect + 1, 0L, NULL, FALSE, FALSE, &of_aoutb, error); aout_gotoff_sect = seg_alloc(); ldef("..gotoff", aout_gotoff_sect + 1, 0L, NULL, FALSE, FALSE, &of_aoutb, error); aout_got_sect = seg_alloc(); ldef("..got", aout_got_sect + 1, 0L, NULL, FALSE, FALSE, &of_aoutb, error); aout_plt_sect = seg_alloc(); ldef("..plt", aout_plt_sect + 1, 0L, NULL, FALSE, FALSE, &of_aoutb, error); aout_sym_sect = seg_alloc(); ldef("..sym", aout_sym_sect + 1, 0L, NULL, FALSE, FALSE, &of_aoutb, error); } #endif static void aout_cleanup(int debuginfo) { struct Reloc *r; (void)debuginfo; aout_pad_sections(); aout_fixup_relocs(&stext); aout_fixup_relocs(&sdata); aout_write(); fclose(aoutfp); saa_free(stext.data); while (stext.head) { r = stext.head; stext.head = stext.head->next; nasm_free(r); } saa_free(sdata.data); while (sdata.head) { r = sdata.head; sdata.head = sdata.head->next; nasm_free(r); } saa_free(syms); raa_free(bsym); saa_free(strs); } static int32_t aout_section_names(char *name, int pass, int *bits) { (void)pass; /* * Default to 32 bits. */ if (!name) *bits = 32; if (!name) return stext.index; if (!strcmp(name, ".text")) return stext.index; else if (!strcmp(name, ".data")) return sdata.index; else if (!strcmp(name, ".bss")) return sbss.index; else return NO_SEG; } static void aout_deflabel(char *name, int32_t segment, int32_t offset, int is_global, char *special) { int pos = strslen + 4; struct Symbol *sym; int special_used = FALSE; if (name[0] == '.' && name[1] == '.' && name[2] != '@') { /* * This is a NASM special symbol. We never allow it into * the a.out symbol table, even if it's a valid one. If it * _isn't_ a valid one, we should barf immediately. */ if (strcmp(name, "..gotpc") && strcmp(name, "..gotoff") && strcmp(name, "..got") && strcmp(name, "..plt") && strcmp(name, "..sym")) error(ERR_NONFATAL, "unrecognised special symbol `%s'", name); return; } if (is_global == 3) { struct Symbol **s; /* * Fix up a forward-reference symbol size from the first * pass. */ for (s = &fwds; *s; s = &(*s)->nextfwd) if (!strcmp((*s)->name, name)) { struct tokenval tokval; expr *e; char *p = special; while (*p && !isspace(*p)) p++; while (*p && isspace(*p)) p++; stdscan_reset(); stdscan_bufptr = p; tokval.t_type = TOKEN_INVALID; e = evaluate(stdscan, NULL, &tokval, NULL, 1, error, NULL); if (e) { if (!is_simple(e)) error(ERR_NONFATAL, "cannot use relocatable" " expression as symbol size"); else (*s)->size = reloc_value(e); } /* * Remove it from the list of unresolved sizes. */ nasm_free((*s)->name); *s = (*s)->nextfwd; return; } return; /* it wasn't an important one */ } saa_wbytes(strs, name, (int32_t)(1 + strlen(name))); strslen += 1 + strlen(name); sym = saa_wstruct(syms); sym->strpos = pos; sym->type = is_global ? SYM_GLOBAL : 0; sym->segment = segment; if (segment == NO_SEG) sym->type |= SECT_ABS; else if (segment == stext.index) { sym->type |= SECT_TEXT; if (is_global) { sym->next = stext.gsyms; stext.gsyms = sym; } else if (!stext.asym) stext.asym = sym; } else if (segment == sdata.index) { sym->type |= SECT_DATA; if (is_global) { sym->next = sdata.gsyms; sdata.gsyms = sym; } else if (!sdata.asym) sdata.asym = sym; } else if (segment == sbss.index) { sym->type |= SECT_BSS; if (is_global) { sym->next = sbss.gsyms; sbss.gsyms = sym; } else if (!sbss.asym) sbss.asym = sym; } else sym->type = SYM_GLOBAL; if (is_global == 2) sym->value = offset; else sym->value = (sym->type == SYM_GLOBAL ? 0 : offset); if (is_global && sym->type != SYM_GLOBAL) { /* * Global symbol exported _from_ this module. We must check * the special text for type information. */ if (special) { int n = strcspn(special, " "); if (!nasm_strnicmp(special, "function", n)) sym->type |= SYM_FUNCTION; else if (!nasm_strnicmp(special, "data", n) || !nasm_strnicmp(special, "object", n)) sym->type |= SYM_DATA; else error(ERR_NONFATAL, "unrecognised symbol type `%.*s'", n, special); if (special[n]) { struct tokenval tokval; expr *e; int fwd = FALSE; char *saveme = stdscan_bufptr; /* bugfix? fbk 8/10/00 */ if (!bsd) { error(ERR_NONFATAL, "Linux a.out does not support" " symbol size information"); } else { while (special[n] && isspace(special[n])) n++; /* * We have a size expression; attempt to * evaluate it. */ sym->type |= SYM_WITH_SIZE; stdscan_reset(); stdscan_bufptr = special + n; tokval.t_type = TOKEN_INVALID; e = evaluate(stdscan, NULL, &tokval, &fwd, 0, error, NULL); if (fwd) { sym->nextfwd = fwds; fwds = sym; sym->name = nasm_strdup(name); } else if (e) { if (!is_simple(e)) error(ERR_NONFATAL, "cannot use relocatable" " expression as symbol size"); else sym->size = reloc_value(e); } } stdscan_bufptr = saveme; /* bugfix? fbk 8/10/00 */ } special_used = TRUE; } } /* * define the references from external-symbol segment numbers * to these symbol records. */ if (segment != NO_SEG && segment != stext.index && segment != sdata.index && segment != sbss.index) bsym = raa_write(bsym, segment, nsyms); sym->symnum = nsyms; nsyms++; if (sym->type & SYM_WITH_SIZE) nsyms++; /* and another for the size */ if (special && !special_used) error(ERR_NONFATAL, "no special symbol features supported here"); } static void aout_add_reloc(struct Section *sect, int32_t segment, int reltype, int bytes) { struct Reloc *r; r = *sect->tail = nasm_malloc(sizeof(struct Reloc)); sect->tail = &r->next; r->next = NULL; r->address = sect->len; r->symbol = (segment == NO_SEG ? -SECT_ABS : segment == stext.index ? -SECT_TEXT : segment == sdata.index ? -SECT_DATA : segment == sbss.index ? -SECT_BSS : raa_read(bsym, segment)); r->reltype = reltype; if (r->symbol >= 0) r->reltype |= RELTYPE_SYMFLAG; r->bytes = bytes; sect->nrelocs++; } /* * This routine deals with ..got and ..sym relocations: the more * complicated kinds. In shared-library writing, some relocations * with respect to global symbols must refer to the precise symbol * rather than referring to an offset from the base of the section * _containing_ the symbol. Such relocations call to this routine, * which searches the symbol list for the symbol in question. * * RELTYPE_GOT references require the _exact_ symbol address to be * used; RELTYPE_ABSOLUTE references can be at an offset from the * symbol. The boolean argument `exact' tells us this. * * Return value is the adjusted value of `addr', having become an * offset from the symbol rather than the section. Should always be * zero when returning from an exact call. * * Limitation: if you define two symbols at the same place, * confusion will occur. * * Inefficiency: we search, currently, using a linked list which * isn't even necessarily sorted. */ static int32_t aout_add_gsym_reloc(struct Section *sect, int32_t segment, int32_t offset, int type, int bytes, int exact) { struct Symbol *sym, *sm, *shead; struct Reloc *r; /* * First look up the segment to find whether it's text, data, * bss or an external symbol. */ shead = NULL; if (segment == stext.index) shead = stext.gsyms; else if (segment == sdata.index) shead = sdata.gsyms; else if (segment == sbss.index) shead = sbss.gsyms; if (!shead) { if (exact && offset != 0) error(ERR_NONFATAL, "unable to find a suitable global symbol" " for this reference"); else aout_add_reloc(sect, segment, type, bytes); return offset; } if (exact) { /* * Find a symbol pointing _exactly_ at this one. */ for (sym = shead; sym; sym = sym->next) if (sym->value == offset) break; } else { /* * Find the nearest symbol below this one. */ sym = NULL; for (sm = shead; sm; sm = sm->next) if (sm->value <= offset && (!sym || sm->value > sym->value)) sym = sm; } if (!sym && exact) { error(ERR_NONFATAL, "unable to find a suitable global symbol" " for this reference"); return 0; } r = *sect->tail = nasm_malloc(sizeof(struct Reloc)); sect->tail = &r->next; r->next = NULL; r->address = sect->len; r->symbol = sym->symnum; r->reltype = type | RELTYPE_SYMFLAG; r->bytes = bytes; sect->nrelocs++; return offset - sym->value; } /* * This routine deals with ..gotoff relocations. These _must_ refer * to a symbol, due to a perversity of *BSD's PIC implementation, * and it must be a non-global one as well; so we store `asym', the * first nonglobal symbol defined in each section, and always work * from that. Relocation type is always RELTYPE_GOTOFF. * * Return value is the adjusted value of `addr', having become an * offset from the `asym' symbol rather than the section. */ static int32_t aout_add_gotoff_reloc(struct Section *sect, int32_t segment, int32_t offset, int bytes) { struct Reloc *r; struct Symbol *asym; /* * First look up the segment to find whether it's text, data, * bss or an external symbol. */ asym = NULL; if (segment == stext.index) asym = stext.asym; else if (segment == sdata.index) asym = sdata.asym; else if (segment == sbss.index) asym = sbss.asym; if (!asym) error(ERR_NONFATAL, "`..gotoff' relocations require a non-global" " symbol in the section"); r = *sect->tail = nasm_malloc(sizeof(struct Reloc)); sect->tail = &r->next; r->next = NULL; r->address = sect->len; r->symbol = asym->symnum; r->reltype = RELTYPE_GOTOFF; r->bytes = bytes; sect->nrelocs++; return offset - asym->value; } static void aout_out(int32_t segto, const void *data, uint32_t type, int32_t segment, int32_t wrt) { struct Section *s; int32_t realbytes = type & OUT_SIZMASK; int32_t addr; uint8_t mydata[4], *p; type &= OUT_TYPMASK; /* * handle absolute-assembly (structure definitions) */ if (segto == NO_SEG) { if (type != OUT_RESERVE) error(ERR_NONFATAL, "attempt to assemble code in [ABSOLUTE]" " space"); return; } if (segto == stext.index) s = &stext; else if (segto == sdata.index) s = &sdata; else if (segto == sbss.index) s = NULL; else { error(ERR_WARNING, "attempt to assemble code in" " segment %d: defaulting to `.text'", segto); s = &stext; } if (!s && type != OUT_RESERVE) { error(ERR_WARNING, "attempt to initialize memory in the" " BSS section: ignored"); if (type == OUT_REL2ADR) realbytes = 2; else if (type == OUT_REL4ADR) realbytes = 4; sbss.len += realbytes; return; } if (type == OUT_RESERVE) { if (s) { error(ERR_WARNING, "uninitialized space declared in" " %s section: zeroing", (segto == stext.index ? "code" : "data")); aout_sect_write(s, NULL, realbytes); } else sbss.len += realbytes; } else if (type == OUT_RAWDATA) { if (segment != NO_SEG) error(ERR_PANIC, "OUT_RAWDATA with other than NO_SEG"); aout_sect_write(s, data, realbytes); } else if (type == OUT_ADDRESS) { addr = *(int32_t *)data; if (segment != NO_SEG) { if (segment % 2) { error(ERR_NONFATAL, "a.out format does not support" " segment base references"); } else { if (wrt == NO_SEG) { aout_add_reloc(s, segment, RELTYPE_ABSOLUTE, realbytes); } else if (!bsd) { error(ERR_NONFATAL, "Linux a.out format does not support" " any use of WRT"); wrt = NO_SEG; /* we can at least _try_ to continue */ } else if (wrt == aout_gotpc_sect + 1) { is_pic = 0x40; aout_add_reloc(s, segment, RELTYPE_GOTPC, realbytes); } else if (wrt == aout_gotoff_sect + 1) { is_pic = 0x40; addr = aout_add_gotoff_reloc(s, segment, addr, realbytes); } else if (wrt == aout_got_sect + 1) { is_pic = 0x40; addr = aout_add_gsym_reloc(s, segment, addr, RELTYPE_GOT, realbytes, TRUE); } else if (wrt == aout_sym_sect + 1) { addr = aout_add_gsym_reloc(s, segment, addr, RELTYPE_ABSOLUTE, realbytes, FALSE); } else if (wrt == aout_plt_sect + 1) { is_pic = 0x40; error(ERR_NONFATAL, "a.out format cannot produce non-PC-" "relative PLT references"); } else { error(ERR_NONFATAL, "a.out format does not support this" " use of WRT"); wrt = NO_SEG; /* we can at least _try_ to continue */ } } } p = mydata; if (realbytes == 2) WRITESHORT(p, addr); else WRITELONG(p, addr); aout_sect_write(s, mydata, realbytes); } else if (type == OUT_REL2ADR) { if (segment == segto) error(ERR_PANIC, "intra-segment OUT_REL2ADR"); if (segment != NO_SEG && segment % 2) { error(ERR_NONFATAL, "a.out format does not support" " segment base references"); } else { if (wrt == NO_SEG) { aout_add_reloc(s, segment, RELTYPE_RELATIVE, 2); } else if (!bsd) { error(ERR_NONFATAL, "Linux a.out format does not support" " any use of WRT"); wrt = NO_SEG; /* we can at least _try_ to continue */ } else if (wrt == aout_plt_sect + 1) { is_pic = 0x40; aout_add_reloc(s, segment, RELTYPE_PLT, 2); } else if (wrt == aout_gotpc_sect + 1 || wrt == aout_gotoff_sect + 1 || wrt == aout_got_sect + 1) { error(ERR_NONFATAL, "a.out format cannot produce PC-" "relative GOT references"); } else { error(ERR_NONFATAL, "a.out format does not support this" " use of WRT"); wrt = NO_SEG; /* we can at least _try_ to continue */ } } p = mydata; WRITESHORT(p, *(int32_t *)data - (realbytes + s->len)); aout_sect_write(s, mydata, 2L); } else if (type == OUT_REL4ADR) { if (segment == segto) error(ERR_PANIC, "intra-segment OUT_REL4ADR"); if (segment != NO_SEG && segment % 2) { error(ERR_NONFATAL, "a.out format does not support" " segment base references"); } else { if (wrt == NO_SEG) { aout_add_reloc(s, segment, RELTYPE_RELATIVE, 4); } else if (!bsd) { error(ERR_NONFATAL, "Linux a.out format does not support" " any use of WRT"); wrt = NO_SEG; /* we can at least _try_ to continue */ } else if (wrt == aout_plt_sect + 1) { is_pic = 0x40; aout_add_reloc(s, segment, RELTYPE_PLT, 4); } else if (wrt == aout_gotpc_sect + 1 || wrt == aout_gotoff_sect + 1 || wrt == aout_got_sect + 1) { error(ERR_NONFATAL, "a.out format cannot produce PC-" "relative GOT references"); } else { error(ERR_NONFATAL, "a.out format does not support this" " use of WRT"); wrt = NO_SEG; /* we can at least _try_ to continue */ } } p = mydata; WRITELONG(p, *(int32_t *)data - (realbytes + s->len)); aout_sect_write(s, mydata, 4L); } } static void aout_pad_sections(void) { static uint8_t pad[] = { 0x90, 0x90, 0x90, 0x90 }; /* * Pad each of the text and data sections with NOPs until their * length is a multiple of four. (NOP == 0x90.) Also increase * the length of the BSS section similarly. */ aout_sect_write(&stext, pad, (-(int32_t)stext.len) & 3); aout_sect_write(&sdata, pad, (-(int32_t)sdata.len) & 3); sbss.len = (sbss.len + 3) & ~3; } /* * a.out files have the curious property that all references to * things in the data or bss sections are done by addresses which * are actually relative to the start of the _text_ section, in the * _file_. (No relation to what happens after linking. No idea why * this should be so. It's very strange.) So we have to go through * the relocation table, _after_ the final size of each section is * known, and fix up the relocations pointed to. */ static void aout_fixup_relocs(struct Section *sect) { struct Reloc *r; saa_rewind(sect->data); for (r = sect->head; r; r = r->next) { uint8_t *p, *q, blk[4]; int32_t l; saa_fread(sect->data, r->address, blk, (int32_t)r->bytes); p = q = blk; l = *p++; if (r->bytes > 1) { l += ((int32_t)*p++) << 8; if (r->bytes == 4) { l += ((int32_t)*p++) << 16; l += ((int32_t)*p++) << 24; } } if (r->symbol == -SECT_DATA) l += stext.len; else if (r->symbol == -SECT_BSS) l += stext.len + sdata.len; if (r->bytes == 4) WRITELONG(q, l); else if (r->bytes == 2) WRITESHORT(q, l); else *q++ = l & 0xFF; saa_fwrite(sect->data, r->address, blk, (int32_t)r->bytes); } } static void aout_write(void) { /* * Emit the a.out header. */ /* OMAGIC, M_386 or MID_I386, no flags */ fwriteint32_t(bsd ? 0x07018600 | is_pic : 0x640107L, aoutfp); fwriteint32_t(stext.len, aoutfp); fwriteint32_t(sdata.len, aoutfp); fwriteint32_t(sbss.len, aoutfp); fwriteint32_t(nsyms * 12, aoutfp); /* length of symbol table */ fwriteint32_t(0L, aoutfp); /* object files have no entry point */ fwriteint32_t(stext.nrelocs * 8, aoutfp); /* size of text relocs */ fwriteint32_t(sdata.nrelocs * 8, aoutfp); /* size of data relocs */ /* * Write out the code section and the data section. */ saa_fpwrite(stext.data, aoutfp); saa_fpwrite(sdata.data, aoutfp); /* * Write out the relocations. */ aout_write_relocs(stext.head); aout_write_relocs(sdata.head); /* * Write the symbol table. */ aout_write_syms(); /* * And the string table. */ fwriteint32_t(strslen + 4, aoutfp); /* length includes length count */ saa_fpwrite(strs, aoutfp); } static void aout_write_relocs(struct Reloc *r) { while (r) { uint32_t word2; fwriteint32_t(r->address, aoutfp); if (r->symbol >= 0) word2 = r->symbol; else word2 = -r->symbol; word2 |= r->reltype << 24; word2 |= (r->bytes == 1 ? 0 : r->bytes == 2 ? 0x2000000L : 0x4000000L); fwriteint32_t(word2, aoutfp); r = r->next; } } static void aout_write_syms(void) { uint32_t i; saa_rewind(syms); for (i = 0; i < nsyms; i++) { struct Symbol *sym = saa_rstruct(syms); fwriteint32_t(sym->strpos, aoutfp); fwriteint32_t((int32_t)sym->type & ~SYM_WITH_SIZE, aoutfp); /* * Fix up the symbol value now we know the final section * sizes. */ if ((sym->type & SECT_MASK) == SECT_DATA) sym->value += stext.len; if ((sym->type & SECT_MASK) == SECT_BSS) sym->value += stext.len + sdata.len; fwriteint32_t(sym->value, aoutfp); /* * Output a size record if necessary. */ if (sym->type & SYM_WITH_SIZE) { fwriteint32_t(sym->strpos, aoutfp); fwriteint32_t(0x0DL, aoutfp); /* special value: means size */ fwriteint32_t(sym->size, aoutfp); i++; /* use up another of `nsyms' */ } } } static void aout_sect_write(struct Section *sect, const uint8_t *data, uint32_t len) { saa_wbytes(sect->data, data, len); sect->len += len; } static int32_t aout_segbase(int32_t segment) { return segment; } static int aout_directive(char *directive, char *value, int pass) { (void)directive; (void)value; (void)pass; return 0; } static void aout_filename(char *inname, char *outname, efunc error) { standard_extension(inname, outname, ".o", error); } static const char *aout_stdmac[] = { "%define __SECT__ [section .text]", "%macro __NASM_CDecl__ 1", "%endmacro", NULL }; static int aout_set_info(enum geninfo type, char **val) { (void)type; (void)val; return 0; } #endif /* OF_AOUT || OF_AOUTB */ #ifdef OF_AOUT struct ofmt of_aout = { "Linux a.out object files", "aout", NULL, null_debug_arr, &null_debug_form, aout_stdmac, aout_init, aout_set_info, aout_out, aout_deflabel, aout_section_names, aout_segbase, aout_directive, aout_filename, aout_cleanup }; #endif #ifdef OF_AOUTB struct ofmt of_aoutb = { "NetBSD/FreeBSD a.out object files", "aoutb", NULL, null_debug_arr, &null_debug_form, aout_stdmac, aoutb_init, aout_set_info, aout_out, aout_deflabel, aout_section_names, aout_segbase, aout_directive, aout_filename, aout_cleanup }; #endif