1 /* ----------------------------------------------------------------------- *
3 * Copyright 1996-2017 The NASM Authors - All Rights Reserved
4 * See the file AUTHORS included with the NASM distribution for
5 * the specific copyright holders.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials provided
16 * with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
19 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
20 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
29 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
30 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 * ----------------------------------------------------------------------- */
35 * Common code for outelf32 and outelf64
60 #if defined(OF_ELF32) || defined(OF_ELF64) || defined(OF_ELFX32)
63 static struct elf_section
**sects
;
64 static int nsects
, sectlen
;
66 #define SHSTR_DELTA 256
67 static char *shstrtab
;
68 static int shstrtablen
, shstrtabsize
;
70 static struct SAA
*syms
;
71 static uint32_t nlocals
, nglobs
, ndebugs
; /* Symbol counts */
73 static int32_t def_seg
;
75 static struct RAA
*bsym
;
77 static struct SAA
*strs
;
78 static uint32_t strslen
;
80 static struct elf_symbol
*fwds
;
82 static char elf_module
[FILENAME_MAX
];
84 extern const struct ofmt of_elf32
;
85 extern const struct ofmt of_elf64
;
86 extern const struct ofmt of_elfx32
;
88 static struct ELF_SECTDATA
{
94 static int elf_nsect
, nsections
;
95 static int64_t elf_foffs
;
97 static void elf_write(void);
98 static void elf_sect_write(struct elf_section
*, const void *, size_t);
99 static void elf_sect_writeaddr(struct elf_section
*, int64_t, size_t);
100 static void elf_section_header(int, int, uint64_t, void *, bool, uint64_t, int, int,
102 static void elf_write_sections(void);
103 static struct SAA
*elf_build_symtab(int32_t *, int32_t *);
104 static struct SAA
*elf_build_reltab(uint64_t *, struct elf_reloc
*);
105 static void add_sectname(const char *, const char *);
114 int section
; /* index into sects[] */
115 int segto
; /* internal section number */
116 char *name
; /* shallow-copied pointer of section name */
120 struct linelist
*next
;
121 struct linelist
*last
;
122 struct symlininfo info
;
133 struct sectlist
*next
;
134 struct sectlist
*last
;
137 /* common debug variables */
138 static int currentline
= 1;
139 static int debug_immcall
= 0;
141 /* stabs debug variables */
142 static struct linelist
*stabslines
= 0;
143 static int numlinestabs
= 0;
144 static char *stabs_filename
= 0;
145 static uint8_t *stabbuf
= 0, *stabstrbuf
= 0, *stabrelbuf
= 0;
146 static int stablen
, stabstrlen
, stabrellen
;
148 /* dwarf debug variables */
149 static struct linelist
*dwarf_flist
= 0, *dwarf_clist
= 0, *dwarf_elist
= 0;
150 static struct sectlist
*dwarf_fsect
= 0, *dwarf_csect
= 0, *dwarf_esect
= 0;
151 static int dwarf_numfiles
= 0, dwarf_nsections
;
152 static uint8_t *arangesbuf
= 0, *arangesrelbuf
= 0, *pubnamesbuf
= 0, *infobuf
= 0, *inforelbuf
= 0,
153 *abbrevbuf
= 0, *linebuf
= 0, *linerelbuf
= 0, *framebuf
= 0, *locbuf
= 0;
154 static int8_t line_base
= -5, line_range
= 14, opcode_base
= 13;
155 static int arangeslen
, arangesrellen
, pubnameslen
, infolen
, inforellen
,
156 abbrevlen
, linelen
, linerellen
, framelen
, loclen
;
157 static int64_t dwarf_infosym
, dwarf_abbrevsym
, dwarf_linesym
;
159 static struct elf_symbol
*lastsym
;
161 /* common debugging routines */
162 static void debug_typevalue(int32_t);
164 /* stabs debugging routines */
165 static void stabs_linenum(const char *filename
, int32_t linenumber
, int32_t);
166 static void stabs_output(int, void *);
167 static void stabs_generate(void);
168 static void stabs_cleanup(void);
170 /* dwarf debugging routines */
171 static void dwarf_init(void);
172 static void dwarf_linenum(const char *filename
, int32_t linenumber
, int32_t);
173 static void dwarf_output(int, void *);
174 static void dwarf_generate(void);
175 static void dwarf_cleanup(void);
176 static void dwarf_findfile(const char *);
177 static void dwarf_findsect(const int);
179 static bool is_elf64(void);
180 static bool is_elf32(void);
181 static bool is_elfx32(void);
183 static bool dfmt_is_stabs(void);
184 static bool dfmt_is_dwarf(void);
187 * Special NASM section numbers which are used to define ELF special
190 static int32_t elf_gotpc_sect
, elf_gotoff_sect
;
191 static int32_t elf_got_sect
, elf_plt_sect
;
192 static int32_t elf_sym_sect
, elf_gottpoff_sect
, elf_tlsie_sect
;
194 uint8_t elf_osabi
= 0; /* Default OSABI = 0 (System V or Linux) */
195 uint8_t elf_abiver
= 0; /* Current ABI version */
197 const struct elf_known_section elf_known_sections
[] = {
198 { ".text", SHT_PROGBITS
, SHF_ALLOC
|SHF_EXECINSTR
, 16 },
199 { ".rodata", SHT_PROGBITS
, SHF_ALLOC
, 4 },
200 { ".lrodata", SHT_PROGBITS
, SHF_ALLOC
, 4 },
201 { ".data", SHT_PROGBITS
, SHF_ALLOC
|SHF_WRITE
, 4 },
202 { ".ldata", SHT_PROGBITS
, SHF_ALLOC
|SHF_WRITE
, 4 },
203 { ".bss", SHT_NOBITS
, SHF_ALLOC
|SHF_WRITE
, 4 },
204 { ".lbss", SHT_NOBITS
, SHF_ALLOC
|SHF_WRITE
, 4 },
205 { ".tdata", SHT_PROGBITS
, SHF_ALLOC
|SHF_WRITE
|SHF_TLS
, 4 },
206 { ".tbss", SHT_NOBITS
, SHF_ALLOC
|SHF_WRITE
|SHF_TLS
, 4 },
207 { ".comment", SHT_PROGBITS
, 0, 1 },
208 { NULL
, SHT_PROGBITS
, SHF_ALLOC
, 1 } /* default */
211 /* parse section attributes */
212 static void elf_section_attrib(char *name
, char *attr
, int pass
,
213 uint32_t *flags_and
, uint32_t *flags_or
,
214 uint64_t *align
, int *type
)
216 char *opt
, *val
, *next
;
218 opt
= nasm_skip_spaces(attr
);
222 while ((opt
= nasm_opt_val(opt
, &val
, &next
))) {
223 if (!nasm_stricmp(opt
, "align")) {
225 nasm_error(ERR_NONFATAL
,
226 "section align without value specified");
231 } else if (!is_power2(*align
)) {
232 nasm_error(ERR_NONFATAL
,
233 "section alignment %"PRId64
" is not a power of two",
238 } else if (!nasm_stricmp(opt
, "alloc")) {
239 *flags_and
|= SHF_ALLOC
;
240 *flags_or
|= SHF_ALLOC
;
241 } else if (!nasm_stricmp(opt
, "noalloc")) {
242 *flags_and
|= SHF_ALLOC
;
243 *flags_or
&= ~SHF_ALLOC
;
244 } else if (!nasm_stricmp(opt
, "exec")) {
245 *flags_and
|= SHF_EXECINSTR
;
246 *flags_or
|= SHF_EXECINSTR
;
247 } else if (!nasm_stricmp(opt
, "noexec")) {
248 *flags_and
|= SHF_EXECINSTR
;
249 *flags_or
&= ~SHF_EXECINSTR
;
250 } else if (!nasm_stricmp(opt
, "write")) {
251 *flags_and
|= SHF_WRITE
;
252 *flags_or
|= SHF_WRITE
;
253 } else if (!nasm_stricmp(opt
, "tls")) {
254 *flags_and
|= SHF_TLS
;
255 *flags_or
|= SHF_TLS
;
256 } else if (!nasm_stricmp(opt
, "nowrite")) {
257 *flags_and
|= SHF_WRITE
;
258 *flags_or
&= ~SHF_WRITE
;
259 } else if (!nasm_stricmp(opt
, "progbits")) {
260 *type
= SHT_PROGBITS
;
261 } else if (!nasm_stricmp(opt
, "nobits")) {
263 } else if (pass
== 1) {
264 nasm_error(ERR_WARNING
,
265 "Unknown section attribute '%s' ignored on"
266 " declaration of section `%s'", opt
, name
);
272 static enum directive_result
273 elf_directive(enum directive directive
, char *value
, int pass
)
282 return DIRR_OK
; /* ignore in pass 2 */
284 n
= readnum(value
, &err
);
286 nasm_error(ERR_NONFATAL
, "`osabi' directive requires a parameter");
290 if (n
< 0 || n
> 255) {
291 nasm_error(ERR_NONFATAL
, "valid osabi numbers are 0 to 255");
298 p
= strchr(value
,',');
302 n
= readnum(p
+ 1, &err
);
303 if (err
|| n
< 0 || n
> 255) {
304 nasm_error(ERR_NONFATAL
, "invalid ABI version number (valid: 0 to 255)");
316 static void elf_init(void)
318 strlcpy(elf_module
, inname
, sizeof(elf_module
));
320 nsects
= sectlen
= 0;
321 syms
= saa_init((int32_t)sizeof(struct elf_symbol
));
322 nlocals
= nglobs
= ndebugs
= 0;
325 saa_wbytes(strs
, "\0", 1L);
326 saa_wbytes(strs
, elf_module
, strlen(elf_module
)+1);
327 strslen
= 2 + strlen(elf_module
);
329 shstrtablen
= shstrtabsize
= 0;;
330 add_sectname("", "");
335 * FIXME: tlsie is Elf32 only and
336 * gottpoff is Elfx32|64 only.
339 elf_gotpc_sect
= seg_alloc();
340 backend_label("..gotpc", elf_gotpc_sect
+ 1, 0L);
341 elf_gotoff_sect
= seg_alloc();
342 backend_label("..gotoff", elf_gotoff_sect
+ 1, 0L);
343 elf_got_sect
= seg_alloc();
344 backend_label("..got", elf_got_sect
+ 1, 0L);
345 elf_plt_sect
= seg_alloc();
346 backend_label("..plt", elf_plt_sect
+ 1, 0L);
347 elf_sym_sect
= seg_alloc();
348 backend_label("..sym", elf_sym_sect
+ 1, 0L);
349 elf_gottpoff_sect
= seg_alloc();
350 backend_label("..gottpoff", elf_gottpoff_sect
+ 1, 0L);
351 elf_tlsie_sect
= seg_alloc();
352 backend_label("..tlsie", elf_tlsie_sect
+ 1, 0L);
354 def_seg
= seg_alloc();
357 static void elf_cleanup(void)
363 for (i
= 0; i
< nsects
; i
++) {
364 if (sects
[i
]->type
!= SHT_NOBITS
)
365 saa_free(sects
[i
]->data
);
367 saa_free(sects
[i
]->rel
);
368 while (sects
[i
]->head
) {
370 sects
[i
]->head
= sects
[i
]->head
->next
;
381 /* add entry to the elf .shstrtab section */
382 static void add_sectname(const char *firsthalf
, const char *secondhalf
)
384 int len
= strlen(firsthalf
) + strlen(secondhalf
);
385 while (shstrtablen
+ len
+ 1 > shstrtabsize
)
386 shstrtab
= nasm_realloc(shstrtab
, (shstrtabsize
+= SHSTR_DELTA
));
387 strcpy(shstrtab
+ shstrtablen
, firsthalf
);
388 strcat(shstrtab
+ shstrtablen
, secondhalf
);
389 shstrtablen
+= len
+ 1;
392 static int elf_make_section(char *name
, int type
, int flags
, int align
)
394 struct elf_section
*s
;
396 s
= nasm_zalloc(sizeof(*s
));
398 if (type
!= SHT_NOBITS
)
399 s
->data
= saa_init(1L);
401 if (!strcmp(name
, ".text"))
404 s
->index
= seg_alloc();
405 add_sectname("", name
);
407 s
->name
= nasm_strdup(name
);
412 if (nsects
>= sectlen
)
413 sects
= nasm_realloc(sects
, (sectlen
+= SECT_DELTA
) * sizeof(*sects
));
419 static int32_t elf_section_names(char *name
, int pass
, int *bits
)
422 uint32_t flags
, flags_and
, flags_or
;
427 *bits
= ofmt
->maxbits
;
431 p
= nasm_skip_word(name
);
434 flags_and
= flags_or
= type
= align
= 0;
436 elf_section_attrib(name
, p
, pass
, &flags_and
,
437 &flags_or
, &align
, &type
);
439 if (!strcmp(name
, ".shstrtab") ||
440 !strcmp(name
, ".symtab") ||
441 !strcmp(name
, ".strtab")) {
442 nasm_error(ERR_NONFATAL
, "attempt to redefine reserved section"
447 for (i
= 0; i
< nsects
; i
++)
448 if (!strcmp(name
, sects
[i
]->name
))
451 const struct elf_known_section
*ks
= elf_known_sections
;
454 if (!strcmp(name
, ks
->name
))
459 type
= type
? type
: ks
->type
;
460 align
= align
? align
: ks
->align
;
461 flags
= (ks
->flags
& ~flags_and
) | flags_or
;
463 i
= elf_make_section(name
, type
, flags
, align
);
464 } else if (pass
== 1) {
465 if ((type
&& sects
[i
]->type
!= type
)
466 || (align
&& sects
[i
]->align
!= align
)
467 || (flags_and
&& ((sects
[i
]->flags
& flags_and
) != flags_or
)))
468 nasm_error(ERR_WARNING
, "incompatible section attributes ignored on"
469 " redeclaration of section `%s'", name
);
472 return sects
[i
]->index
;
475 static void elf_deflabel(char *name
, int32_t segment
, int64_t offset
,
476 int is_global
, char *special
)
479 struct elf_symbol
*sym
;
480 bool special_used
= false;
482 #if defined(DEBUG) && DEBUG>2
483 nasm_error(ERR_DEBUG
,
484 " elf_deflabel: %s, seg=%"PRIx32
", off=%"PRIx64
", is_global=%d, %s\n",
485 name
, segment
, offset
, is_global
, special
);
487 if (name
[0] == '.' && name
[1] == '.' && name
[2] != '@') {
489 * This is a NASM special symbol. We never allow it into
490 * the ELF symbol table, even if it's a valid one. If it
491 * _isn't_ a valid one, we should barf immediately.
493 * FIXME: tlsie is Elf32 only, and gottpoff is Elfx32|64 only.
495 if (strcmp(name
, "..gotpc") && strcmp(name
, "..gotoff") &&
496 strcmp(name
, "..got") && strcmp(name
, "..plt") &&
497 strcmp(name
, "..sym") && strcmp(name
, "..gottpoff") &&
498 strcmp(name
, "..tlsie"))
499 nasm_error(ERR_NONFATAL
, "unrecognised special symbol `%s'", name
);
503 if (is_global
== 3) {
504 struct elf_symbol
**s
;
506 * Fix up a forward-reference symbol size from the first
509 for (s
= &fwds
; *s
; s
= &(*s
)->nextfwd
)
510 if (!strcmp((*s
)->name
, name
)) {
511 struct tokenval tokval
;
513 char *p
= nasm_skip_spaces(nasm_skip_word(special
));
517 tokval
.t_type
= TOKEN_INVALID
;
518 e
= evaluate(stdscan
, NULL
, &tokval
, NULL
, 1, NULL
);
521 nasm_error(ERR_NONFATAL
, "cannot use relocatable"
522 " expression as symbol size");
524 (*s
)->size
= reloc_value(e
);
528 * Remove it from the list of unresolved sizes.
530 nasm_free((*s
)->name
);
534 return; /* it wasn't an important one */
537 saa_wbytes(strs
, name
, (int32_t)(1 + strlen(name
)));
538 strslen
+= 1 + strlen(name
);
540 lastsym
= sym
= saa_wstruct(syms
);
542 memset(&sym
->symv
, 0, sizeof(struct rbtree
));
545 sym
->type
= is_global
? SYM_GLOBAL
: SYM_LOCAL
;
546 sym
->other
= STV_DEFAULT
;
548 if (segment
== NO_SEG
)
549 sym
->section
= SHN_ABS
;
552 sym
->section
= SHN_UNDEF
;
553 if (segment
== def_seg
) {
554 /* we have to be sure at least text section is there */
556 if (segment
!= elf_section_names(".text", 2, &tempint
))
557 nasm_panic("strange segment conditions in ELF driver");
559 for (i
= 0; i
< nsects
; i
++) {
560 if (segment
== sects
[i
]->index
) {
561 sym
->section
= i
+ 1;
567 if (is_global
== 2) {
570 sym
->section
= SHN_COMMON
;
572 * We have a common variable. Check the special text to see
573 * if it's a valid number and power of two; if so, store it
574 * as the alignment for the common variable.
578 sym
->symv
.key
= readnum(special
, &err
);
580 nasm_error(ERR_NONFATAL
, "alignment constraint `%s' is not a"
581 " valid number", special
);
582 else if ((sym
->symv
.key
| (sym
->symv
.key
- 1)) != 2 * sym
->symv
.key
- 1)
583 nasm_error(ERR_NONFATAL
, "alignment constraint `%s' is not a"
584 " power of two", special
);
588 sym
->symv
.key
= (sym
->section
== SHN_UNDEF
? 0 : offset
);
590 if (sym
->type
== SYM_GLOBAL
) {
592 * If sym->section == SHN_ABS, then the first line of the
593 * else section would cause a core dump, because its a reference
594 * beyond the end of the section array.
595 * This behaviour is exhibited by this code:
598 * To avoid such a crash, such requests are silently discarded.
599 * This may not be the best solution.
601 if (sym
->section
== SHN_UNDEF
|| sym
->section
== SHN_COMMON
) {
602 bsym
= raa_write(bsym
, segment
, nglobs
);
603 } else if (sym
->section
!= SHN_ABS
) {
605 * This is a global symbol; so we must add it to the rbtree
606 * of global symbols in its section.
608 * In addition, we check the special text for symbol
609 * type and size information.
611 sects
[sym
->section
-1]->gsyms
=
612 rb_insert(sects
[sym
->section
-1]->gsyms
, &sym
->symv
);
615 int n
= strcspn(special
, " \t");
617 if (!nasm_strnicmp(special
, "function", n
))
618 sym
->type
|= STT_FUNC
;
619 else if (!nasm_strnicmp(special
, "data", n
) ||
620 !nasm_strnicmp(special
, "object", n
))
621 sym
->type
|= STT_OBJECT
;
622 else if (!nasm_strnicmp(special
, "notype", n
))
623 sym
->type
|= STT_NOTYPE
;
625 nasm_error(ERR_NONFATAL
, "unrecognised symbol type `%.*s'",
629 special
= nasm_skip_spaces(special
);
631 n
= strcspn(special
, " \t");
632 if (!nasm_strnicmp(special
, "default", n
))
633 sym
->other
= STV_DEFAULT
;
634 else if (!nasm_strnicmp(special
, "internal", n
))
635 sym
->other
= STV_INTERNAL
;
636 else if (!nasm_strnicmp(special
, "hidden", n
))
637 sym
->other
= STV_HIDDEN
;
638 else if (!nasm_strnicmp(special
, "protected", n
))
639 sym
->other
= STV_PROTECTED
;
646 struct tokenval tokval
;
649 char *saveme
= stdscan_get();
651 while (special
[n
] && nasm_isspace(special
[n
]))
654 * We have a size expression; attempt to
658 stdscan_set(special
+ n
);
659 tokval
.t_type
= TOKEN_INVALID
;
660 e
= evaluate(stdscan
, NULL
, &tokval
, &fwd
, 0, NULL
);
664 sym
->name
= nasm_strdup(name
);
667 nasm_error(ERR_NONFATAL
, "cannot use relocatable"
668 " expression as symbol size");
670 sym
->size
= reloc_value(e
);
677 * If TLS segment, mark symbol accordingly.
679 if (sects
[sym
->section
- 1]->flags
& SHF_TLS
) {
681 sym
->type
|= STT_TLS
;
684 sym
->globnum
= nglobs
;
689 if (special
&& !special_used
)
690 nasm_error(ERR_NONFATAL
, "no special symbol features supported here");
693 static void elf_add_reloc(struct elf_section
*sect
, int32_t segment
,
694 int64_t offset
, int type
)
698 r
= *sect
->tail
= nasm_zalloc(sizeof(struct elf_reloc
));
699 sect
->tail
= &r
->next
;
701 r
->address
= sect
->len
;
704 if (segment
!= NO_SEG
) {
706 for (i
= 0; i
< nsects
; i
++)
707 if (segment
== sects
[i
]->index
)
710 r
->symbol
= GLOBAL_TEMP_BASE
+ raa_read(bsym
, segment
);
718 * This routine deals with ..got and ..sym relocations: the more
719 * complicated kinds. In shared-library writing, some relocations
720 * with respect to global symbols must refer to the precise symbol
721 * rather than referring to an offset from the base of the section
722 * _containing_ the symbol. Such relocations call to this routine,
723 * which searches the symbol list for the symbol in question.
725 * R_386_GOT32 | R_X86_64_GOT32 references require the _exact_ symbol address to be
726 * used; R_386_32 | R_X86_64_32 references can be at an offset from the symbol.
727 * The boolean argument `exact' tells us this.
729 * Return value is the adjusted value of `addr', having become an
730 * offset from the symbol rather than the section. Should always be
731 * zero when returning from an exact call.
733 * Limitation: if you define two symbols at the same place,
734 * confusion will occur.
736 * Inefficiency: we search, currently, using a linked list which
737 * isn't even necessarily sorted.
739 static int64_t elf_add_gsym_reloc(struct elf_section
*sect
,
740 int32_t segment
, uint64_t offset
,
741 int64_t pcrel
, int type
, bool exact
)
744 struct elf_section
*s
;
745 struct elf_symbol
*sym
;
750 * First look up the segment/offset pair and find a global
751 * symbol corresponding to it. If it's not one of our segments,
752 * then it must be an external symbol, in which case we're fine
753 * doing a normal elf_add_reloc after first sanity-checking
754 * that the offset from the symbol is zero.
757 for (i
= 0; i
< nsects
; i
++)
758 if (segment
== sects
[i
]->index
) {
765 nasm_error(ERR_NONFATAL
, "invalid access to an external symbol");
767 elf_add_reloc(sect
, segment
, offset
- pcrel
, type
);
771 srb
= rb_search(s
->gsyms
, offset
);
772 if (!srb
|| (exact
&& srb
->key
!= offset
)) {
773 nasm_error(ERR_NONFATAL
, "unable to find a suitable global symbol"
774 " for this reference");
777 sym
= container_of(srb
, struct elf_symbol
, symv
);
779 r
= *sect
->tail
= nasm_malloc(sizeof(struct elf_reloc
));
780 sect
->tail
= &r
->next
;
783 r
->address
= sect
->len
;
784 r
->offset
= offset
- pcrel
- sym
->symv
.key
;
785 r
->symbol
= GLOBAL_TEMP_BASE
+ sym
->globnum
;
792 static void elf32_out(int32_t segto
, const void *data
,
793 enum out_type type
, uint64_t size
,
794 int32_t segment
, int32_t wrt
)
796 struct elf_section
*s
;
800 static struct symlininfo sinfo
;
803 for (i
= 0; i
< nsects
; i
++)
804 if (segto
== sects
[i
]->index
) {
809 int tempint
; /* ignored */
810 if (segto
!= elf_section_names(".text", 2, &tempint
))
811 nasm_panic("strange segment conditions in ELF driver");
813 s
= sects
[nsects
- 1];
818 /* again some stabs debugging stuff */
819 sinfo
.offset
= s
->len
;
822 sinfo
.name
= s
->name
;
823 dfmt
->debug_output(TY_DEBUGSYMLIN
, &sinfo
);
824 /* end of debugging stuff */
826 if (s
->type
== SHT_NOBITS
&& type
!= OUT_RESERVE
) {
827 nasm_error(ERR_WARNING
, "attempt to initialize memory in"
828 " BSS section `%s': ignored", s
->name
);
829 s
->len
+= realsize(type
, size
);
835 if (s
->type
== SHT_PROGBITS
) {
836 nasm_error(ERR_WARNING
, "uninitialized space declared in"
837 " non-BSS section `%s': zeroing", s
->name
);
838 elf_sect_write(s
, NULL
, size
);
844 elf_sect_write(s
, data
, size
);
850 int asize
= abs((int)size
);
852 addr
= *(int64_t *)data
;
853 if (segment
!= NO_SEG
) {
855 nasm_error(ERR_NONFATAL
, "ELF format does not support"
856 " segment base references");
860 * The if() is a hack to deal with compilers which
861 * don't handle switch() statements with 64-bit
867 elf_add_reloc(s
, segment
, 0, R_386_8
);
871 elf_add_reloc(s
, segment
, 0, R_386_16
);
874 elf_add_reloc(s
, segment
, 0, R_386_32
);
876 default: /* Error issued further down */
879 } else if (wrt
== elf_gotpc_sect
+ 1) {
881 * The user will supply GOT relative to $$. ELF
882 * will let us have GOT relative to $. So we
883 * need to fix up the data item by $-$$.
886 elf_add_reloc(s
, segment
, 0, R_386_GOTPC
);
887 } else if (wrt
== elf_gotoff_sect
+ 1) {
888 elf_add_reloc(s
, segment
, 0, R_386_GOTOFF
);
889 } else if (wrt
== elf_tlsie_sect
+ 1) {
890 addr
= elf_add_gsym_reloc(s
, segment
, addr
, 0,
892 } else if (wrt
== elf_got_sect
+ 1) {
893 addr
= elf_add_gsym_reloc(s
, segment
, addr
, 0,
895 } else if (wrt
== elf_sym_sect
+ 1) {
899 addr
= elf_add_gsym_reloc(s
, segment
, addr
, 0,
904 addr
= elf_add_gsym_reloc(s
, segment
, addr
, 0,
908 addr
= elf_add_gsym_reloc(s
, segment
, addr
, 0,
914 } else if (wrt
== elf_plt_sect
+ 1) {
915 nasm_error(ERR_NONFATAL
, "ELF format cannot produce non-PC-"
916 "relative PLT references");
918 nasm_error(ERR_NONFATAL
, "ELF format does not support this"
920 wrt
= NO_SEG
; /* we can at least _try_ to continue */
926 nasm_error(ERR_WARNING
| ERR_WARN_GNUELF
,
927 "8- or 16-bit relocations in ELF32 is a GNU extension");
928 } else if (asize
!= 4 && segment
!= NO_SEG
) {
929 nasm_error(ERR_NONFATAL
, "Unsupported non-32-bit ELF relocation");
931 elf_sect_writeaddr(s
, addr
, asize
);
940 reltype
= R_386_PC16
;
945 addr
= *(int64_t *)data
- size
;
946 nasm_assert(segment
!= segto
);
947 if (segment
!= NO_SEG
&& segment
% 2) {
948 nasm_error(ERR_NONFATAL
, "ELF format does not support"
949 " segment base references");
952 nasm_error(ERR_WARNING
| ERR_WARN_GNUELF
,
953 "8- or 16-bit relocations in ELF is a GNU extension");
954 elf_add_reloc(s
, segment
, 0, reltype
);
956 nasm_error(ERR_NONFATAL
,
957 "Unsupported non-32-bit ELF relocation");
960 elf_sect_writeaddr(s
, addr
, bytes
);
964 addr
= *(int64_t *)data
- size
;
965 if (segment
== segto
)
966 nasm_panic("intra-segment OUT_REL4ADR");
967 if (segment
!= NO_SEG
&& segment
% 2) {
968 nasm_error(ERR_NONFATAL
, "ELF format does not support"
969 " segment base references");
972 elf_add_reloc(s
, segment
, 0, R_386_PC32
);
973 } else if (wrt
== elf_plt_sect
+ 1) {
974 elf_add_reloc(s
, segment
, 0, R_386_PLT32
);
975 } else if (wrt
== elf_gotpc_sect
+ 1 ||
976 wrt
== elf_gotoff_sect
+ 1 ||
977 wrt
== elf_got_sect
+ 1) {
978 nasm_error(ERR_NONFATAL
, "ELF format cannot produce PC-"
979 "relative GOT references");
981 nasm_error(ERR_NONFATAL
, "ELF format does not support this"
983 wrt
= NO_SEG
; /* we can at least _try_ to continue */
986 elf_sect_writeaddr(s
, addr
, 4);
990 nasm_error(ERR_NONFATAL
, "32-bit ELF format does not support 64-bit relocations");
992 elf_sect_writeaddr(s
, addr
, 8);
999 static void elf64_out(int32_t segto
, const void *data
,
1000 enum out_type type
, uint64_t size
,
1001 int32_t segment
, int32_t wrt
)
1003 struct elf_section
*s
;
1007 static struct symlininfo sinfo
;
1010 for (i
= 0; i
< nsects
; i
++)
1011 if (segto
== sects
[i
]->index
) {
1016 int tempint
; /* ignored */
1017 if (segto
!= elf_section_names(".text", 2, &tempint
))
1018 nasm_panic("strange segment conditions in ELF driver");
1020 s
= sects
[nsects
- 1];
1025 /* again some stabs debugging stuff */
1026 sinfo
.offset
= s
->len
;
1028 sinfo
.segto
= segto
;
1029 sinfo
.name
= s
->name
;
1030 dfmt
->debug_output(TY_DEBUGSYMLIN
, &sinfo
);
1031 /* end of debugging stuff */
1033 if (s
->type
== SHT_NOBITS
&& type
!= OUT_RESERVE
) {
1034 nasm_error(ERR_WARNING
, "attempt to initialize memory in"
1035 " BSS section `%s': ignored", s
->name
);
1036 s
->len
+= realsize(type
, size
);
1042 if (s
->type
== SHT_PROGBITS
) {
1043 nasm_error(ERR_WARNING
, "uninitialized space declared in"
1044 " non-BSS section `%s': zeroing", s
->name
);
1045 elf_sect_write(s
, NULL
, size
);
1051 if (segment
!= NO_SEG
)
1052 nasm_panic("OUT_RAWDATA with other than NO_SEG");
1053 elf_sect_write(s
, data
, size
);
1058 int isize
= (int)size
;
1059 int asize
= abs((int)size
);
1061 addr
= *(int64_t *)data
;
1062 if (segment
== NO_SEG
) {
1064 } else if (segment
% 2) {
1065 nasm_error(ERR_NONFATAL
, "ELF format does not support"
1066 " segment base references");
1068 if (wrt
== NO_SEG
) {
1072 elf_add_reloc(s
, segment
, addr
, R_X86_64_8
);
1076 elf_add_reloc(s
, segment
, addr
, R_X86_64_16
);
1079 elf_add_reloc(s
, segment
, addr
, R_X86_64_32
);
1082 elf_add_reloc(s
, segment
, addr
, R_X86_64_32S
);
1086 elf_add_reloc(s
, segment
, addr
, R_X86_64_64
);
1089 nasm_panic("internal error elf64-hpa-871");
1093 } else if (wrt
== elf_gotpc_sect
+ 1) {
1095 * The user will supply GOT relative to $$. ELF
1096 * will let us have GOT relative to $. So we
1097 * need to fix up the data item by $-$$.
1100 elf_add_reloc(s
, segment
, addr
, R_X86_64_GOTPC32
);
1102 } else if (wrt
== elf_gotoff_sect
+ 1) {
1104 nasm_error(ERR_NONFATAL
, "ELF64 requires ..gotoff "
1105 "references to be qword");
1107 elf_add_reloc(s
, segment
, addr
, R_X86_64_GOTOFF64
);
1110 } else if (wrt
== elf_got_sect
+ 1) {
1113 elf_add_gsym_reloc(s
, segment
, addr
, 0,
1114 R_X86_64_GOT32
, true);
1118 elf_add_gsym_reloc(s
, segment
, addr
, 0,
1119 R_X86_64_GOT64
, true);
1123 nasm_error(ERR_NONFATAL
, "invalid ..got reference");
1126 } else if (wrt
== elf_sym_sect
+ 1) {
1130 elf_add_gsym_reloc(s
, segment
, addr
, 0,
1136 elf_add_gsym_reloc(s
, segment
, addr
, 0,
1137 R_X86_64_16
, false);
1141 elf_add_gsym_reloc(s
, segment
, addr
, 0,
1142 R_X86_64_32
, false);
1146 elf_add_gsym_reloc(s
, segment
, addr
, 0,
1147 R_X86_64_32S
, false);
1152 elf_add_gsym_reloc(s
, segment
, addr
, 0,
1153 R_X86_64_64
, false);
1157 nasm_panic("internal error elf64-hpa-903");
1160 } else if (wrt
== elf_plt_sect
+ 1) {
1161 nasm_error(ERR_NONFATAL
, "ELF format cannot produce non-PC-"
1162 "relative PLT references");
1164 nasm_error(ERR_NONFATAL
, "ELF format does not support this"
1168 elf_sect_writeaddr(s
, addr
, asize
);
1173 reltype
= R_X86_64_PC8
;
1178 reltype
= R_X86_64_PC16
;
1183 addr
= *(int64_t *)data
- size
;
1184 if (segment
== segto
)
1185 nasm_panic("intra-segment OUT_REL1ADR");
1186 if (segment
== NO_SEG
) {
1188 } else if (segment
% 2) {
1189 nasm_error(ERR_NONFATAL
, "ELF format does not support"
1190 " segment base references");
1192 if (wrt
== NO_SEG
) {
1193 elf_add_reloc(s
, segment
, addr
, reltype
);
1196 nasm_error(ERR_NONFATAL
,
1197 "Unsupported non-32-bit ELF relocation");
1200 elf_sect_writeaddr(s
, addr
, bytes
);
1204 addr
= *(int64_t *)data
- size
;
1205 if (segment
== segto
)
1206 nasm_panic("intra-segment OUT_REL4ADR");
1207 if (segment
== NO_SEG
) {
1209 } else if (segment
% 2) {
1210 nasm_error(ERR_NONFATAL
, "ELF64 format does not support"
1211 " segment base references");
1213 if (wrt
== NO_SEG
) {
1214 elf_add_reloc(s
, segment
, addr
, R_X86_64_PC32
);
1216 } else if (wrt
== elf_plt_sect
+ 1) {
1217 elf_add_gsym_reloc(s
, segment
, addr
+size
, size
,
1218 R_X86_64_PLT32
, true);
1220 } else if (wrt
== elf_gotpc_sect
+ 1 ||
1221 wrt
== elf_got_sect
+ 1) {
1222 elf_add_gsym_reloc(s
, segment
, addr
+size
, size
,
1223 R_X86_64_GOTPCREL
, true);
1225 } else if (wrt
== elf_gotoff_sect
+ 1 ||
1226 wrt
== elf_got_sect
+ 1) {
1227 nasm_error(ERR_NONFATAL
, "ELF64 requires ..gotoff references to be "
1229 } else if (wrt
== elf_gottpoff_sect
+ 1) {
1230 elf_add_gsym_reloc(s
, segment
, addr
+size
, size
,
1231 R_X86_64_GOTTPOFF
, true);
1234 nasm_error(ERR_NONFATAL
, "ELF64 format does not support this"
1238 elf_sect_writeaddr(s
, addr
, 4);
1242 addr
= *(int64_t *)data
- size
;
1243 if (segment
== segto
)
1244 nasm_panic("intra-segment OUT_REL8ADR");
1245 if (segment
== NO_SEG
) {
1247 } else if (segment
% 2) {
1248 nasm_error(ERR_NONFATAL
, "ELF64 format does not support"
1249 " segment base references");
1251 if (wrt
== NO_SEG
) {
1252 elf_add_reloc(s
, segment
, addr
, R_X86_64_PC64
);
1254 } else if (wrt
== elf_gotpc_sect
+ 1 ||
1255 wrt
== elf_got_sect
+ 1) {
1256 elf_add_gsym_reloc(s
, segment
, addr
+size
, size
,
1257 R_X86_64_GOTPCREL64
, true);
1259 } else if (wrt
== elf_gotoff_sect
+ 1 ||
1260 wrt
== elf_got_sect
+ 1) {
1261 nasm_error(ERR_NONFATAL
, "ELF64 requires ..gotoff references to be "
1263 } else if (wrt
== elf_gottpoff_sect
+ 1) {
1264 nasm_error(ERR_NONFATAL
, "ELF64 requires ..gottpoff references to be "
1267 nasm_error(ERR_NONFATAL
, "ELF64 format does not support this"
1271 elf_sect_writeaddr(s
, addr
, 8);
1279 static void elfx32_out(int32_t segto
, const void *data
,
1280 enum out_type type
, uint64_t size
,
1281 int32_t segment
, int32_t wrt
)
1283 struct elf_section
*s
;
1287 static struct symlininfo sinfo
;
1290 for (i
= 0; i
< nsects
; i
++)
1291 if (segto
== sects
[i
]->index
) {
1296 int tempint
; /* ignored */
1297 if (segto
!= elf_section_names(".text", 2, &tempint
))
1298 nasm_panic("strange segment conditions in ELF driver");
1300 s
= sects
[nsects
- 1];
1305 /* again some stabs debugging stuff */
1306 sinfo
.offset
= s
->len
;
1308 sinfo
.segto
= segto
;
1309 sinfo
.name
= s
->name
;
1310 dfmt
->debug_output(TY_DEBUGSYMLIN
, &sinfo
);
1311 /* end of debugging stuff */
1313 if (s
->type
== SHT_NOBITS
&& type
!= OUT_RESERVE
) {
1314 nasm_error(ERR_WARNING
, "attempt to initialize memory in"
1315 " BSS section `%s': ignored", s
->name
);
1316 s
->len
+= realsize(type
, size
);
1322 if (s
->type
== SHT_PROGBITS
) {
1323 nasm_error(ERR_WARNING
, "uninitialized space declared in"
1324 " non-BSS section `%s': zeroing", s
->name
);
1325 elf_sect_write(s
, NULL
, size
);
1331 if (segment
!= NO_SEG
)
1332 nasm_panic("OUT_RAWDATA with other than NO_SEG");
1333 elf_sect_write(s
, data
, size
);
1338 int isize
= (int)size
;
1339 int asize
= abs((int)size
);
1341 addr
= *(int64_t *)data
;
1342 if (segment
== NO_SEG
) {
1344 } else if (segment
% 2) {
1345 nasm_error(ERR_NONFATAL
, "ELF format does not support"
1346 " segment base references");
1348 if (wrt
== NO_SEG
) {
1352 elf_add_reloc(s
, segment
, addr
, R_X86_64_8
);
1356 elf_add_reloc(s
, segment
, addr
, R_X86_64_16
);
1359 elf_add_reloc(s
, segment
, addr
, R_X86_64_32
);
1362 elf_add_reloc(s
, segment
, addr
, R_X86_64_32S
);
1366 elf_add_reloc(s
, segment
, addr
, R_X86_64_64
);
1369 nasm_panic("internal error elfx32-hpa-871");
1373 } else if (wrt
== elf_gotpc_sect
+ 1) {
1375 * The user will supply GOT relative to $$. ELF
1376 * will let us have GOT relative to $. So we
1377 * need to fix up the data item by $-$$.
1380 elf_add_reloc(s
, segment
, addr
, R_X86_64_GOTPC32
);
1382 } else if (wrt
== elf_gotoff_sect
+ 1) {
1383 nasm_error(ERR_NONFATAL
, "ELFX32 doesn't support "
1384 "R_X86_64_GOTOFF64");
1385 } else if (wrt
== elf_got_sect
+ 1) {
1388 elf_add_gsym_reloc(s
, segment
, addr
, 0,
1389 R_X86_64_GOT32
, true);
1393 nasm_error(ERR_NONFATAL
, "invalid ..got reference");
1396 } else if (wrt
== elf_sym_sect
+ 1) {
1400 elf_add_gsym_reloc(s
, segment
, addr
, 0,
1406 elf_add_gsym_reloc(s
, segment
, addr
, 0,
1407 R_X86_64_16
, false);
1411 elf_add_gsym_reloc(s
, segment
, addr
, 0,
1412 R_X86_64_32
, false);
1416 elf_add_gsym_reloc(s
, segment
, addr
, 0,
1417 R_X86_64_32S
, false);
1422 elf_add_gsym_reloc(s
, segment
, addr
, 0,
1423 R_X86_64_64
, false);
1427 nasm_panic("internal error elfx32-hpa-903");
1430 } else if (wrt
== elf_plt_sect
+ 1) {
1431 nasm_error(ERR_NONFATAL
, "ELF format cannot produce non-PC-"
1432 "relative PLT references");
1434 nasm_error(ERR_NONFATAL
, "ELF format does not support this"
1438 elf_sect_writeaddr(s
, addr
, asize
);
1443 reltype
= R_X86_64_PC8
;
1448 reltype
= R_X86_64_PC16
;
1453 addr
= *(int64_t *)data
- size
;
1454 if (segment
== segto
)
1455 nasm_panic("intra-segment OUT_REL1ADR");
1456 if (segment
== NO_SEG
) {
1458 } else if (segment
% 2) {
1459 nasm_error(ERR_NONFATAL
, "ELF format does not support"
1460 " segment base references");
1462 if (wrt
== NO_SEG
) {
1463 elf_add_reloc(s
, segment
, addr
, reltype
);
1466 nasm_error(ERR_NONFATAL
,
1467 "Unsupported non-32-bit ELF relocation");
1470 elf_sect_writeaddr(s
, addr
, bytes
);
1474 addr
= *(int64_t *)data
- size
;
1475 if (segment
== segto
)
1476 nasm_panic("intra-segment OUT_REL4ADR");
1477 if (segment
== NO_SEG
) {
1479 } else if (segment
% 2) {
1480 nasm_error(ERR_NONFATAL
, "ELFX32 format does not support"
1481 " segment base references");
1483 if (wrt
== NO_SEG
) {
1484 elf_add_reloc(s
, segment
, addr
, R_X86_64_PC32
);
1486 } else if (wrt
== elf_plt_sect
+ 1) {
1487 elf_add_gsym_reloc(s
, segment
, addr
+size
, size
,
1488 R_X86_64_PLT32
, true);
1490 } else if (wrt
== elf_gotpc_sect
+ 1 ||
1491 wrt
== elf_got_sect
+ 1) {
1492 elf_add_gsym_reloc(s
, segment
, addr
+size
, size
,
1493 R_X86_64_GOTPCREL
, true);
1495 } else if (wrt
== elf_gotoff_sect
+ 1 ||
1496 wrt
== elf_got_sect
+ 1) {
1497 nasm_error(ERR_NONFATAL
, "invalid ..gotoff reference");
1498 } else if (wrt
== elf_gottpoff_sect
+ 1) {
1499 elf_add_gsym_reloc(s
, segment
, addr
+size
, size
,
1500 R_X86_64_GOTTPOFF
, true);
1503 nasm_error(ERR_NONFATAL
, "ELFX32 format does not support this"
1507 elf_sect_writeaddr(s
, addr
, 4);
1511 nasm_error(ERR_NONFATAL
, "32-bit ELF format does not support 64-bit relocations");
1513 elf_sect_writeaddr(s
, addr
, 8);
1521 static void elf_write(void)
1528 int32_t symtablen
, symtablocal
;
1531 * Work out how many sections we will have. We have SHN_UNDEF,
1532 * then the flexible user sections, then the fixed sections
1533 * `.shstrtab', `.symtab' and `.strtab', then optionally
1534 * relocation sections for the user sections.
1536 nsections
= sec_numspecial
+ 1;
1537 if (dfmt_is_stabs())
1539 else if (dfmt_is_dwarf())
1542 add_sectname("", ".shstrtab");
1543 add_sectname("", ".symtab");
1544 add_sectname("", ".strtab");
1545 for (i
= 0; i
< nsects
; i
++) {
1546 nsections
++; /* for the section itself */
1547 if (sects
[i
]->head
) {
1548 nsections
++; /* for its relocations */
1549 add_sectname(is_elf32() ? ".rel" : ".rela", sects
[i
]->name
);
1553 if (dfmt_is_stabs()) {
1554 /* in case the debug information is wanted, just add these three sections... */
1555 add_sectname("", ".stab");
1556 add_sectname("", ".stabstr");
1557 add_sectname(is_elf32() ? ".rel" : ".rela", ".stab");
1558 } else if (dfmt_is_dwarf()) {
1559 /* the dwarf debug standard specifies the following ten sections,
1560 not all of which are currently implemented,
1561 although all of them are defined. */
1562 #define debug_aranges (int64_t) (nsections-10)
1563 #define debug_info (int64_t) (nsections-7)
1564 #define debug_abbrev (int64_t) (nsections-5)
1565 #define debug_line (int64_t) (nsections-4)
1566 add_sectname("", ".debug_aranges");
1567 add_sectname(".rela", ".debug_aranges");
1568 add_sectname("", ".debug_pubnames");
1569 add_sectname("", ".debug_info");
1570 add_sectname(".rela", ".debug_info");
1571 add_sectname("", ".debug_abbrev");
1572 add_sectname("", ".debug_line");
1573 add_sectname(".rela", ".debug_line");
1574 add_sectname("", ".debug_frame");
1575 add_sectname("", ".debug_loc");
1579 * Output the ELF header.
1581 if (is_elf32() || is_elfx32()) {
1584 nasm_zero(ehdr
.e_ident
);
1585 memcpy(ehdr
.e_ident
, ELFMAG
, SELFMAG
);
1586 ehdr
.e_ident
[EI_CLASS
] = ELFCLASS32
;
1587 ehdr
.e_ident
[EI_DATA
] = ELFDATA2LSB
;
1588 ehdr
.e_ident
[EI_VERSION
] = EV_CURRENT
;
1589 ehdr
.e_ident
[EI_OSABI
] = elf_osabi
;
1590 ehdr
.e_ident
[EI_ABIVERSION
] = elf_abiver
;
1592 ehdr
.e_type
= cpu_to_le16(ET_REL
);
1593 ehdr
.e_machine
= cpu_to_le16(is_elf32() ? EM_386
: EM_X86_64
);
1594 ehdr
.e_version
= cpu_to_le16(EV_CURRENT
);
1597 ehdr
.e_shoff
= sizeof(Elf64_Ehdr
);
1599 ehdr
.e_ehsize
= cpu_to_le16(sizeof(Elf32_Ehdr
));
1600 ehdr
.e_phentsize
= 0;
1602 ehdr
.e_shentsize
= cpu_to_le16(sizeof(Elf32_Shdr
));
1603 ehdr
.e_shnum
= cpu_to_le16(nsections
);
1604 ehdr
.e_shstrndx
= cpu_to_le16(sec_shstrtab
);
1606 nasm_write(&ehdr
, sizeof(ehdr
), ofile
);
1607 fwritezero(sizeof(Elf64_Ehdr
) - sizeof(Elf32_Ehdr
), ofile
);
1611 nasm_assert(is_elf64());
1613 nasm_zero(ehdr
.e_ident
);
1614 memcpy(ehdr
.e_ident
, ELFMAG
, SELFMAG
);
1615 ehdr
.e_ident
[EI_CLASS
] = ELFCLASS64
;
1616 ehdr
.e_ident
[EI_DATA
] = ELFDATA2LSB
;
1617 ehdr
.e_ident
[EI_VERSION
] = EV_CURRENT
;
1618 ehdr
.e_ident
[EI_OSABI
] = elf_osabi
;
1619 ehdr
.e_ident
[EI_ABIVERSION
] = elf_abiver
;
1621 ehdr
.e_type
= cpu_to_le16(ET_REL
);
1622 ehdr
.e_machine
= cpu_to_le16(EM_X86_64
);
1623 ehdr
.e_version
= cpu_to_le16(EV_CURRENT
);
1626 ehdr
.e_shoff
= sizeof(Elf64_Ehdr
);
1628 ehdr
.e_ehsize
= cpu_to_le16(sizeof(Elf64_Ehdr
));
1629 ehdr
.e_phentsize
= 0;
1631 ehdr
.e_shentsize
= cpu_to_le16(sizeof(Elf64_Shdr
));
1632 ehdr
.e_shnum
= cpu_to_le16(nsections
);
1633 ehdr
.e_shstrndx
= cpu_to_le16(sec_shstrtab
);
1635 nasm_write(&ehdr
, sizeof(ehdr
), ofile
);
1639 * Build the symbol table and relocation tables.
1641 symtab
= elf_build_symtab(&symtablen
, &symtablocal
);
1642 for (i
= 0; i
< nsects
; i
++)
1644 sects
[i
]->rel
= elf_build_reltab(§s
[i
]->rellen
,
1648 * Now output the section header table.
1651 elf_foffs
= sizeof(Elf64_Ehdr
) + (is_elf64() ? sizeof(Elf64_Shdr
): sizeof(Elf32_Shdr
)) * nsections
;
1652 align
= ALIGN(elf_foffs
, SEC_FILEALIGN
) - elf_foffs
;
1655 elf_sects
= nasm_malloc(sizeof(*elf_sects
) * nsections
);
1658 elf_section_header(0, SHT_NULL
, 0, NULL
, false, 0, SHN_UNDEF
, 0, 0, 0);
1661 /* The normal sections */
1662 for (i
= 0; i
< nsects
; i
++) {
1663 elf_section_header(p
- shstrtab
, sects
[i
]->type
, sects
[i
]->flags
,
1664 (sects
[i
]->type
== SHT_PROGBITS
?
1665 sects
[i
]->data
: NULL
), true,
1666 sects
[i
]->len
, 0, 0, sects
[i
]->align
, 0);
1671 elf_section_header(p
- shstrtab
, SHT_STRTAB
, 0, shstrtab
, false,
1672 shstrtablen
, 0, 0, 1, 0);
1677 elf_section_header(p
- shstrtab
, SHT_SYMTAB
, 0, symtab
, true,
1678 symtablen
, sec_strtab
, symtablocal
, 8, 24);
1680 elf_section_header(p
- shstrtab
, SHT_SYMTAB
, 0, symtab
, true,
1681 symtablen
, sec_strtab
, symtablocal
, 4, 16);
1685 elf_section_header(p
- shstrtab
, SHT_STRTAB
, 0, strs
, true,
1686 strslen
, 0, 0, 1, 0);
1689 /* The relocation sections */
1691 for (i
= 0; i
< nsects
; i
++) {
1692 if (sects
[i
]->head
) {
1693 elf_section_header(p
- shstrtab
, SHT_REL
, 0, sects
[i
]->rel
, true,
1694 sects
[i
]->rellen
, sec_symtab
, i
+ 1, 4, 8);
1698 } else if (is_elfx32()) {
1699 for (i
= 0; i
< nsects
; i
++) {
1700 if (sects
[i
]->head
) {
1701 elf_section_header(p
- shstrtab
, SHT_RELA
, 0, sects
[i
]->rel
, true,
1702 sects
[i
]->rellen
, sec_symtab
, i
+ 1, 4, 12);
1707 nasm_assert(is_elf64());
1708 for (i
= 0; i
< nsects
; i
++) {
1709 if (sects
[i
]->head
) {
1710 elf_section_header(p
- shstrtab
, SHT_RELA
, 0, sects
[i
]->rel
, true,
1711 sects
[i
]->rellen
, sec_symtab
, i
+ 1, 8, 24);
1717 if (dfmt_is_stabs()) {
1718 /* for debugging information, create the last three sections
1719 which are the .stab , .stabstr and .rel.stab sections respectively */
1721 /* this function call creates the stab sections in memory */
1724 if (stabbuf
&& stabstrbuf
&& stabrelbuf
) {
1725 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, stabbuf
, false,
1726 stablen
, sec_stabstr
, 0, 4, 12);
1729 elf_section_header(p
- shstrtab
, SHT_STRTAB
, 0, stabstrbuf
, false,
1730 stabstrlen
, 0, 0, 4, 0);
1733 /* link -> symtable info -> section to refer to */
1735 elf_section_header(p
- shstrtab
, SHT_REL
, 0, stabrelbuf
, false,
1736 stabrellen
, sec_symtab
, sec_stab
, 4, 8);
1738 elf_section_header(p
- shstrtab
, SHT_RELA
, 0, stabrelbuf
, false,
1739 stabrellen
, sec_symtab
, sec_stab
, 4, is_elf64() ? 24 : 12);
1743 } else if (dfmt_is_dwarf()) {
1744 /* for dwarf debugging information, create the ten dwarf sections */
1746 /* this function call creates the dwarf sections in memory */
1750 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, arangesbuf
, false,
1751 arangeslen
, 0, 0, 1, 0);
1754 elf_section_header(p
- shstrtab
, SHT_RELA
, 0, arangesrelbuf
, false,
1755 arangesrellen
, sec_symtab
,
1756 is_elf64() ? debug_aranges
: sec_debug_aranges
,
1757 1, is_elf64() ? 24 : 12);
1760 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, pubnamesbuf
,
1761 false, pubnameslen
, 0, 0, 1, 0);
1764 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, infobuf
, false,
1765 infolen
, 0, 0, 1, 0);
1768 elf_section_header(p
- shstrtab
, SHT_RELA
, 0, inforelbuf
, false,
1769 inforellen
, sec_symtab
,
1770 is_elf64() ? debug_info
: sec_debug_info
,
1771 1, is_elf64() ? 24 : 12);
1774 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, abbrevbuf
, false,
1775 abbrevlen
, 0, 0, 1, 0);
1778 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, linebuf
, false,
1779 linelen
, 0, 0, 1, 0);
1782 elf_section_header(p
- shstrtab
, SHT_RELA
, 0, linerelbuf
, false,
1783 linerellen
, sec_symtab
,
1784 is_elf64() ? debug_line
: sec_debug_line
,
1785 1, is_elf64() ? 24 : 12);
1788 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, framebuf
, false,
1789 framelen
, 0, 0, 8, 0);
1792 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, locbuf
, false,
1793 loclen
, 0, 0, 1, 0);
1796 fwritezero(align
, ofile
);
1799 * Now output the sections.
1801 elf_write_sections();
1803 nasm_free(elf_sects
);
1807 static struct SAA
*elf_build_symtab(int32_t *len
, int32_t *local
)
1809 struct SAA
*s
= saa_init(1L);
1810 struct elf_symbol
*sym
;
1813 size_t usize
= is_elf64() ? sizeof(Elf64_Sym
) : sizeof(Elf32_Sym
);
1822 * Zero symbol first as required by spec.
1824 saa_wbytes(s
, NULL
, usize
);
1829 * Next, an entry for the file name.
1832 u
.sym64
.st_name
= cpu_to_le32(1);
1833 u
.sym64
.st_info
= ELF64_ST_INFO(STB_LOCAL
, STT_FILE
);
1834 u
.sym64
.st_other
= 0;
1835 u
.sym64
.st_shndx
= cpu_to_le16(SHN_ABS
);
1836 u
.sym64
.st_value
= 0;
1837 u
.sym64
.st_size
= 0;
1839 u
.sym32
.st_name
= cpu_to_le32(1);
1840 u
.sym32
.st_value
= 0;
1841 u
.sym32
.st_size
= 0;
1842 u
.sym32
.st_info
= ELF32_ST_INFO(STB_LOCAL
, STT_FILE
);
1843 u
.sym32
.st_other
= 0;
1844 u
.sym32
.st_shndx
= cpu_to_le16(SHN_ABS
);
1846 saa_wbytes(s
, &u
, usize
);
1852 * Now some standard symbols defining the segments, for relocation
1856 u
.sym64
.st_name
= 0;
1857 u
.sym64
.st_other
= 0;
1858 u
.sym64
.st_value
= 0;
1859 u
.sym64
.st_size
= 0;
1860 for (i
= 1; i
<= nsects
; i
++) {
1861 u
.sym64
.st_info
= ELF64_ST_INFO(STB_LOCAL
, STT_SECTION
);
1862 u
.sym64
.st_shndx
= cpu_to_le16(i
);
1863 saa_wbytes(s
, &u
, usize
);
1868 u
.sym32
.st_name
= 0;
1869 u
.sym32
.st_value
= 0;
1870 u
.sym32
.st_size
= 0;
1871 u
.sym32
.st_other
= 0;
1872 for (i
= 1; i
<= nsects
; i
++) {
1873 u
.sym32
.st_info
= ELF32_ST_INFO(STB_LOCAL
, STT_SECTION
);
1874 u
.sym32
.st_shndx
= cpu_to_le16(i
);
1875 saa_wbytes(s
, &u
, usize
);
1882 * Now the other local symbols.
1886 while ((sym
= saa_rstruct(syms
))) {
1887 if (sym
->type
& SYM_GLOBAL
)
1889 u
.sym64
.st_name
= cpu_to_le32(sym
->strpos
);
1890 u
.sym64
.st_info
= sym
->type
;
1891 u
.sym64
.st_other
= sym
->other
;
1892 u
.sym64
.st_shndx
= cpu_to_le16(sym
->section
);
1893 u
.sym64
.st_value
= cpu_to_le64(sym
->symv
.key
);
1894 u
.sym64
.st_size
= cpu_to_le64(sym
->size
);
1895 saa_wbytes(s
, &u
, usize
);
1900 * dwarf needs symbols for debug sections
1901 * which are relocation targets.
1903 if (dfmt_is_dwarf()) {
1904 dwarf_infosym
= *local
;
1905 u
.sym64
.st_name
= 0;
1906 u
.sym64
.st_info
= ELF64_ST_INFO(STB_LOCAL
, STT_SECTION
);
1907 u
.sym64
.st_other
= 0;
1908 u
.sym64
.st_shndx
= cpu_to_le16(debug_info
);
1909 u
.sym64
.st_value
= 0;
1910 u
.sym64
.st_size
= 0;
1911 saa_wbytes(s
, &u
, usize
);
1914 dwarf_abbrevsym
= *local
;
1915 u
.sym64
.st_name
= 0;
1916 u
.sym64
.st_info
= ELF64_ST_INFO(STB_LOCAL
, STT_SECTION
);
1917 u
.sym64
.st_other
= 0;
1918 u
.sym64
.st_shndx
= cpu_to_le16(debug_abbrev
);
1919 u
.sym64
.st_value
= 0;
1920 u
.sym64
.st_size
= 0;
1921 saa_wbytes(s
, &u
, usize
);
1924 dwarf_linesym
= *local
;
1925 u
.sym64
.st_name
= 0;
1926 u
.sym64
.st_info
= ELF64_ST_INFO(STB_LOCAL
, STT_SECTION
);
1927 u
.sym64
.st_other
= 0;
1928 u
.sym64
.st_shndx
= cpu_to_le16(debug_line
);
1929 u
.sym64
.st_value
= 0;
1930 u
.sym64
.st_size
= 0;
1931 saa_wbytes(s
, &u
, usize
);
1936 while ((sym
= saa_rstruct(syms
))) {
1937 if (sym
->type
& SYM_GLOBAL
)
1939 u
.sym32
.st_name
= cpu_to_le32(sym
->strpos
);
1940 u
.sym32
.st_value
= cpu_to_le32(sym
->symv
.key
);
1941 u
.sym32
.st_size
= cpu_to_le32(sym
->size
);
1942 u
.sym32
.st_info
= sym
->type
;
1943 u
.sym32
.st_other
= sym
->other
;
1944 u
.sym32
.st_shndx
= cpu_to_le16(sym
->section
);
1945 saa_wbytes(s
, &u
, usize
);
1950 * dwarf needs symbols for debug sections
1951 * which are relocation targets.
1953 if (dfmt_is_dwarf()) {
1954 dwarf_infosym
= *local
;
1955 u
.sym32
.st_name
= 0;
1956 u
.sym32
.st_value
= 0;
1957 u
.sym32
.st_size
= 0;
1958 u
.sym32
.st_info
= ELF32_ST_INFO(STB_LOCAL
, STT_SECTION
);
1959 u
.sym32
.st_other
= 0;
1960 u
.sym32
.st_shndx
= cpu_to_le16(sec_debug_info
);
1961 saa_wbytes(s
, &u
, usize
);
1964 dwarf_abbrevsym
= *local
;
1965 u
.sym32
.st_name
= 0;
1966 u
.sym32
.st_value
= 0;
1967 u
.sym32
.st_size
= 0;
1968 u
.sym32
.st_info
= ELF32_ST_INFO(STB_LOCAL
, STT_SECTION
);
1969 u
.sym32
.st_other
= 0;
1970 u
.sym32
.st_shndx
= cpu_to_le16(sec_debug_abbrev
);
1971 saa_wbytes(s
, &u
, usize
);
1974 dwarf_linesym
= *local
;
1975 u
.sym32
.st_name
= 0;
1976 u
.sym32
.st_value
= 0;
1977 u
.sym32
.st_size
= 0;
1978 u
.sym32
.st_info
= ELF32_ST_INFO(STB_LOCAL
, STT_SECTION
);
1979 u
.sym32
.st_other
= 0;
1980 u
.sym32
.st_shndx
= cpu_to_le16(sec_debug_line
);
1981 saa_wbytes(s
, &u
, usize
);
1988 * Now the global symbols.
1992 while ((sym
= saa_rstruct(syms
))) {
1993 if (!(sym
->type
& SYM_GLOBAL
))
1995 u
.sym64
.st_name
= cpu_to_le32(sym
->strpos
);
1996 u
.sym64
.st_info
= sym
->type
;
1997 u
.sym64
.st_other
= sym
->other
;
1998 u
.sym64
.st_shndx
= cpu_to_le16(sym
->section
);
1999 u
.sym64
.st_value
= cpu_to_le64(sym
->symv
.key
);
2000 u
.sym64
.st_size
= cpu_to_le64(sym
->size
);
2001 saa_wbytes(s
, &u
, usize
);
2005 while ((sym
= saa_rstruct(syms
))) {
2006 if (!(sym
->type
& SYM_GLOBAL
))
2008 u
.sym32
.st_name
= cpu_to_le32(sym
->strpos
);
2009 u
.sym32
.st_value
= cpu_to_le32(sym
->symv
.key
);
2010 u
.sym32
.st_size
= cpu_to_le32(sym
->size
);
2011 u
.sym32
.st_info
= sym
->type
;
2012 u
.sym32
.st_other
= sym
->other
;
2013 u
.sym32
.st_shndx
= cpu_to_le16(sym
->section
);
2014 saa_wbytes(s
, &u
, usize
);
2022 static struct SAA
*elf_build_reltab(uint64_t *len
, struct elf_reloc
*r
)
2025 int32_t global_offset
;
2027 size_t usize
= is_elf64() ? sizeof(Elf64_Rela
) :
2028 (is_elfx32() ? sizeof(Elf32_Rela
) : sizeof(Elf32_Rel
));
2042 * How to onvert from a global placeholder to a real symbol index;
2043 * the +2 refers to the two special entries, the null entry and
2044 * the filename entry.
2046 global_offset
= -GLOBAL_TEMP_BASE
+ nsects
+ nlocals
+ ndebugs
+ 2;
2050 int32_t sym
= r
->symbol
;
2052 if (sym
>= GLOBAL_TEMP_BASE
)
2053 sym
+= global_offset
;
2055 u
.rel32
.r_offset
= cpu_to_le32(r
->address
);
2056 u
.rel32
.r_info
= cpu_to_le32(ELF32_R_INFO(sym
, r
->type
));
2057 saa_wbytes(s
, &u
, usize
);
2062 } else if (is_elfx32()) {
2064 int32_t sym
= r
->symbol
;
2066 if (sym
>= GLOBAL_TEMP_BASE
)
2067 sym
+= global_offset
;
2069 u
.rela32
.r_offset
= cpu_to_le32(r
->address
);
2070 u
.rela32
.r_info
= cpu_to_le32(ELF32_R_INFO(sym
, r
->type
));
2071 u
.rela32
.r_addend
= cpu_to_le32(r
->offset
);
2072 saa_wbytes(s
, &u
, usize
);
2078 nasm_assert(is_elf64());
2080 int32_t sym
= r
->symbol
;
2082 if (sym
>= GLOBAL_TEMP_BASE
)
2083 sym
+= global_offset
;
2085 u
.rela64
.r_offset
= cpu_to_le64(r
->address
);
2086 u
.rela64
.r_info
= cpu_to_le64(ELF64_R_INFO(sym
, r
->type
));
2087 u
.rela64
.r_addend
= cpu_to_le64(r
->offset
);
2088 saa_wbytes(s
, &u
, usize
);
2098 static void elf_section_header(int name
, int type
, uint64_t flags
,
2099 void *data
, bool is_saa
, uint64_t datalen
,
2100 int link
, int info
, int align
, int eltsize
)
2107 elf_sects
[elf_nsect
].data
= data
;
2108 elf_sects
[elf_nsect
].len
= datalen
;
2109 elf_sects
[elf_nsect
].is_saa
= is_saa
;
2112 if (is_elf32() || is_elfx32()) {
2113 shdr
.shdr32
.sh_name
= cpu_to_le32(name
);
2114 shdr
.shdr32
.sh_type
= cpu_to_le32(type
);
2115 shdr
.shdr32
.sh_flags
= cpu_to_le32(flags
);
2116 shdr
.shdr32
.sh_addr
= 0;
2117 shdr
.shdr32
.sh_offset
= cpu_to_le32(type
== SHT_NULL
? 0 : elf_foffs
);
2118 shdr
.shdr32
.sh_size
= cpu_to_le32(datalen
);
2120 elf_foffs
+= ALIGN(datalen
, SEC_FILEALIGN
);
2121 shdr
.shdr32
.sh_link
= cpu_to_le32(link
);
2122 shdr
.shdr32
.sh_info
= cpu_to_le32(info
);
2123 shdr
.shdr32
.sh_addralign
= cpu_to_le32(align
);
2124 shdr
.shdr32
.sh_entsize
= cpu_to_le32(eltsize
);
2126 nasm_assert(is_elf64());
2128 shdr
.shdr64
.sh_name
= cpu_to_le32(name
);
2129 shdr
.shdr64
.sh_type
= cpu_to_le32(type
);
2130 shdr
.shdr64
.sh_flags
= cpu_to_le64(flags
);
2131 shdr
.shdr64
.sh_addr
= 0;
2132 shdr
.shdr64
.sh_offset
= cpu_to_le64(type
== SHT_NULL
? 0 : elf_foffs
);
2133 shdr
.shdr64
.sh_size
= cpu_to_le32(datalen
);
2135 elf_foffs
+= ALIGN(datalen
, SEC_FILEALIGN
);
2136 shdr
.shdr64
.sh_link
= cpu_to_le32(link
);
2137 shdr
.shdr64
.sh_info
= cpu_to_le32(info
);
2138 shdr
.shdr64
.sh_addralign
= cpu_to_le64(align
);
2139 shdr
.shdr64
.sh_entsize
= cpu_to_le64(eltsize
);
2142 nasm_write(&shdr
, is_elf64() ? sizeof(shdr
.shdr64
) : sizeof(shdr
.shdr32
), ofile
);
2145 static void elf_write_sections(void)
2148 for (i
= 0; i
< elf_nsect
; i
++)
2149 if (elf_sects
[i
].data
) {
2150 int32_t len
= elf_sects
[i
].len
;
2151 int32_t reallen
= ALIGN(len
, SEC_FILEALIGN
);
2152 int32_t align
= reallen
- len
;
2153 if (elf_sects
[i
].is_saa
)
2154 saa_fpwrite(elf_sects
[i
].data
, ofile
);
2156 nasm_write(elf_sects
[i
].data
, len
, ofile
);
2157 fwritezero(align
, ofile
);
2161 static void elf_sect_write(struct elf_section
*sect
, const void *data
, size_t len
)
2163 saa_wbytes(sect
->data
, data
, len
);
2167 static void elf_sect_writeaddr(struct elf_section
*sect
, int64_t data
, size_t len
)
2169 saa_writeaddr(sect
->data
, data
, len
);
2173 static void elf_sectalign(int32_t seg
, unsigned int value
)
2175 struct elf_section
*s
= NULL
;
2178 for (i
= 0; i
< nsects
; i
++) {
2179 if (sects
[i
]->index
== seg
) {
2184 if (!s
|| !is_power2(value
))
2187 if (value
> s
->align
)
2191 extern macros_t elf_stdmac
[];
2193 /* Claim "elf" as a pragma namespace, for the future */
2194 static const struct pragma_facility elf_pragma_list
[] =
2197 { NULL
, NULL
} /* Implements the canonical output name */
2201 static const struct dfmt elf32_df_dwarf
= {
2202 "ELF32 (i386) dwarf debug format for Linux/Unix",
2206 null_debug_deflabel
,
2207 null_debug_directive
,
2211 NULL
/* pragma list */
2214 static const struct dfmt elf32_df_stabs
= {
2215 "ELF32 (i386) stabs debug format for Linux/Unix",
2219 null_debug_deflabel
,
2220 null_debug_directive
,
2224 NULL
/* pragma list */
2227 static const struct dfmt
* const elf32_debugs_arr
[3] =
2228 { &elf32_df_dwarf
, &elf32_df_stabs
, NULL
};
2230 const struct ofmt of_elf32
= {
2231 "ELF32 (i386) object files (e.g. Linux)",
2241 nasm_do_legacy_output
,
2253 static const struct dfmt elf64_df_dwarf
= {
2254 "ELF64 (x86-64) dwarf debug format for Linux/Unix",
2258 null_debug_deflabel
,
2259 null_debug_directive
,
2263 NULL
/* pragma list */
2266 static const struct dfmt elf64_df_stabs
= {
2267 "ELF64 (x86-64) stabs debug format for Linux/Unix",
2271 null_debug_deflabel
,
2272 null_debug_directive
,
2276 NULL
/* pragma list */
2279 static const struct dfmt
* const elf64_debugs_arr
[3] =
2280 { &elf64_df_dwarf
, &elf64_df_stabs
, NULL
};
2282 const struct ofmt of_elf64
= {
2283 "ELF64 (x86_64) object files (e.g. Linux)",
2293 nasm_do_legacy_output
,
2305 static const struct dfmt elfx32_df_dwarf
= {
2306 "ELFX32 (x86-64) dwarf debug format for Linux/Unix",
2310 null_debug_deflabel
,
2311 null_debug_directive
,
2315 NULL
/* pragma list */
2318 static const struct dfmt elfx32_df_stabs
= {
2319 "ELFX32 (x86-64) stabs debug format for Linux/Unix",
2323 null_debug_deflabel
,
2324 null_debug_directive
,
2331 static const struct dfmt
* const elfx32_debugs_arr
[3] =
2332 { &elfx32_df_dwarf
, &elfx32_df_stabs
, NULL
};
2334 const struct ofmt of_elfx32
= {
2335 "ELFX32 (x86_64) object files (e.g. Linux)",
2345 nasm_do_legacy_output
,
2354 NULL
/* pragma list */
2357 static bool is_elf64(void)
2359 return ofmt
== &of_elf64
;
2362 static bool is_elf32(void)
2364 return ofmt
== &of_elf32
;
2367 static bool is_elfx32(void)
2369 return ofmt
== &of_elfx32
;
2372 static bool dfmt_is_stabs(void)
2374 return dfmt
== &elf32_df_stabs
||
2375 dfmt
== &elfx32_df_stabs
||
2376 dfmt
== &elf64_df_stabs
;
2379 static bool dfmt_is_dwarf(void)
2381 return dfmt
== &elf32_df_dwarf
||
2382 dfmt
== &elfx32_df_dwarf
||
2383 dfmt
== &elf64_df_dwarf
;
2386 /* common debugging routines */
2387 static void debug_typevalue(int32_t type
)
2389 int32_t stype
, ssize
;
2390 switch (TYM_TYPE(type
)) {
2437 stype
= STT_SECTION
;
2452 if (stype
== STT_OBJECT
&& lastsym
&& !lastsym
->type
) {
2453 lastsym
->size
= ssize
;
2454 lastsym
->type
= stype
;
2458 /* stabs debugging routines */
2460 static void stabs_linenum(const char *filename
, int32_t linenumber
, int32_t segto
)
2463 if (!stabs_filename
) {
2464 stabs_filename
= nasm_malloc(strlen(filename
) + 1);
2465 strcpy(stabs_filename
, filename
);
2467 if (strcmp(stabs_filename
, filename
)) {
2468 /* yep, a memory leak...this program is one-shot anyway, so who cares...
2469 in fact, this leak comes in quite handy to maintain a list of files
2470 encountered so far in the symbol lines... */
2472 /* why not nasm_free(stabs_filename); we're done with the old one */
2474 stabs_filename
= nasm_malloc(strlen(filename
) + 1);
2475 strcpy(stabs_filename
, filename
);
2479 currentline
= linenumber
;
2482 static void stabs_output(int type
, void *param
)
2484 struct symlininfo
*s
;
2485 struct linelist
*el
;
2486 if (type
== TY_DEBUGSYMLIN
) {
2487 if (debug_immcall
) {
2488 s
= (struct symlininfo
*)param
;
2489 if (!(sects
[s
->section
]->flags
& SHF_EXECINSTR
))
2490 return; /* line info is only collected for executable sections */
2492 el
= nasm_malloc(sizeof(struct linelist
));
2493 el
->info
.offset
= s
->offset
;
2494 el
->info
.section
= s
->section
;
2495 el
->info
.name
= s
->name
;
2496 el
->line
= currentline
;
2497 el
->filename
= stabs_filename
;
2500 stabslines
->last
->next
= el
;
2501 stabslines
->last
= el
;
2504 stabslines
->last
= el
;
2511 /* for creating the .stab , .stabstr and .rel.stab sections in memory */
2513 static void stabs_generate(void)
2515 int i
, numfiles
, strsize
, numstabs
= 0, currfile
, mainfileindex
;
2516 uint8_t *sbuf
, *ssbuf
, *rbuf
, *sptr
, *rptr
;
2520 struct linelist
*ptr
;
2524 allfiles
= nasm_zalloc(numlinestabs
* sizeof(char *));
2527 if (numfiles
== 0) {
2528 allfiles
[0] = ptr
->filename
;
2531 for (i
= 0; i
< numfiles
; i
++) {
2532 if (!strcmp(allfiles
[i
], ptr
->filename
))
2535 if (i
>= numfiles
) {
2536 allfiles
[i
] = ptr
->filename
;
2543 fileidx
= nasm_malloc(numfiles
* sizeof(int));
2544 for (i
= 0; i
< numfiles
; i
++) {
2545 fileidx
[i
] = strsize
;
2546 strsize
+= strlen(allfiles
[i
]) + 1;
2548 currfile
= mainfileindex
= 0;
2549 for (i
= 0; i
< numfiles
; i
++) {
2550 if (!strcmp(allfiles
[i
], elf_module
)) {
2551 currfile
= mainfileindex
= i
;
2557 * worst case size of the stab buffer would be:
2558 * the sourcefiles changes each line, which would mean 1 SOL, 1 SYMLIN per line
2559 * plus one "ending" entry
2561 sbuf
= nasm_malloc((numlinestabs
* 2 + 4) *
2562 sizeof(struct stabentry
));
2563 ssbuf
= nasm_malloc(strsize
);
2564 rbuf
= nasm_malloc(numlinestabs
* (is_elf64() ? 16 : 8) * (2 + 3));
2567 for (i
= 0; i
< numfiles
; i
++)
2568 strcpy((char *)ssbuf
+ fileidx
[i
], allfiles
[i
]);
2571 stabstrlen
= strsize
; /* set global variable for length of stab strings */
2579 * this is the first stab, its strx points to the filename of the
2580 * the source-file, the n_desc field should be set to the number
2581 * of remaining stabs
2583 WRITE_STAB(sptr
, fileidx
[0], 0, 0, 0, stabstrlen
);
2585 /* this is the stab for the main source file */
2586 WRITE_STAB(sptr
, fileidx
[mainfileindex
], N_SO
, 0, 0, 0);
2588 /* relocation table entry */
2591 * Since the symbol table has two entries before
2592 * the section symbols, the index in the info.section
2593 * member must be adjusted by adding 2
2597 WRITELONG(rptr
, (sptr
- sbuf
) - 4);
2598 WRITELONG(rptr
, ((ptr
->info
.section
+ 2) << 8) | R_386_32
);
2599 } else if (is_elfx32()) {
2600 WRITELONG(rptr
, (sptr
- sbuf
) - 4);
2601 WRITELONG(rptr
, ((ptr
->info
.section
+ 2) << 8) | R_X86_64_32
);
2604 nasm_assert(is_elf64());
2605 WRITEDLONG(rptr
, (int64_t)(sptr
- sbuf
) - 4);
2606 WRITELONG(rptr
, R_X86_64_32
);
2607 WRITELONG(rptr
, ptr
->info
.section
+ 2);
2608 WRITEDLONG(rptr
, 0);
2615 if (strcmp(allfiles
[currfile
], ptr
->filename
)) {
2616 /* oops file has changed... */
2617 for (i
= 0; i
< numfiles
; i
++)
2618 if (!strcmp(allfiles
[i
], ptr
->filename
))
2621 WRITE_STAB(sptr
, fileidx
[currfile
], N_SOL
, 0, 0,
2625 /* relocation table entry */
2626 WRITELONG(rptr
, (sptr
- sbuf
) - 4);
2627 WRITELONG(rptr
, ((ptr
->info
.section
+ 2) << 8) | R_386_32
);
2630 WRITE_STAB(sptr
, 0, N_SLINE
, 0, ptr
->line
, ptr
->info
.offset
);
2633 /* relocation table entry */
2634 WRITELONG(rptr
, (sptr
- sbuf
) - 4);
2635 WRITELONG(rptr
, ((ptr
->info
.section
+ 2) << 8) | R_386_32
);
2639 } else if (is_elfx32()) {
2641 if (strcmp(allfiles
[currfile
], ptr
->filename
)) {
2642 /* oops file has changed... */
2643 for (i
= 0; i
< numfiles
; i
++)
2644 if (!strcmp(allfiles
[i
], ptr
->filename
))
2647 WRITE_STAB(sptr
, fileidx
[currfile
], N_SOL
, 0, 0,
2651 /* relocation table entry */
2652 WRITELONG(rptr
, (sptr
- sbuf
) - 4);
2653 WRITELONG(rptr
, ((ptr
->info
.section
+ 2) << 8) | R_X86_64_32
);
2654 WRITELONG(rptr
, ptr
->info
.offset
);
2657 WRITE_STAB(sptr
, 0, N_SLINE
, 0, ptr
->line
, ptr
->info
.offset
);
2660 /* relocation table entry */
2661 WRITELONG(rptr
, (sptr
- sbuf
) - 4);
2662 WRITELONG(rptr
, ((ptr
->info
.section
+ 2) << 8) | R_X86_64_32
);
2663 WRITELONG(rptr
, ptr
->info
.offset
);
2668 nasm_assert(is_elf64());
2670 if (strcmp(allfiles
[currfile
], ptr
->filename
)) {
2671 /* oops file has changed... */
2672 for (i
= 0; i
< numfiles
; i
++)
2673 if (!strcmp(allfiles
[i
], ptr
->filename
))
2676 WRITE_STAB(sptr
, fileidx
[currfile
], N_SOL
, 0, 0,
2680 /* relocation table entry */
2681 WRITEDLONG(rptr
, (int64_t)(sptr
- sbuf
) - 4);
2682 WRITELONG(rptr
, R_X86_64_32
);
2683 WRITELONG(rptr
, ptr
->info
.section
+ 2);
2684 WRITEDLONG(rptr
, ptr
->info
.offset
);
2687 WRITE_STAB(sptr
, 0, N_SLINE
, 0, ptr
->line
, ptr
->info
.offset
);
2690 /* relocation table entry */
2691 WRITEDLONG(rptr
, (int64_t)(sptr
- sbuf
) - 4);
2692 WRITELONG(rptr
, R_X86_64_32
);
2693 WRITELONG(rptr
, ptr
->info
.section
+ 2);
2694 WRITEDLONG(rptr
, ptr
->info
.offset
);
2700 /* this is an "ending" token */
2701 WRITE_STAB(sptr
, 0, N_SO
, 0, 0, 0);
2704 ((struct stabentry
*)sbuf
)->n_desc
= numstabs
;
2706 nasm_free(allfiles
);
2709 stablen
= (sptr
- sbuf
);
2710 stabrellen
= (rptr
- rbuf
);
2716 static void stabs_cleanup(void)
2718 struct linelist
*ptr
, *del
;
2730 nasm_free(stabrelbuf
);
2731 nasm_free(stabstrbuf
);
2734 /* dwarf routines */
2736 static void dwarf_init(void)
2738 ndebugs
= 3; /* 3 debug symbols */
2741 static void dwarf_linenum(const char *filename
, int32_t linenumber
,
2745 dwarf_findfile(filename
);
2747 currentline
= linenumber
;
2750 /* called from elf_out with type == TY_DEBUGSYMLIN */
2751 static void dwarf_output(int type
, void *param
)
2753 int ln
, aa
, inx
, maxln
, soc
;
2754 struct symlininfo
*s
;
2759 s
= (struct symlininfo
*)param
;
2761 /* line number info is only gathered for executable sections */
2762 if (!(sects
[s
->section
]->flags
& SHF_EXECINSTR
))
2765 /* Check if section index has changed */
2766 if (!(dwarf_csect
&& (dwarf_csect
->section
) == (s
->section
)))
2767 dwarf_findsect(s
->section
);
2769 /* do nothing unless line or file has changed */
2773 ln
= currentline
- dwarf_csect
->line
;
2774 aa
= s
->offset
- dwarf_csect
->offset
;
2775 inx
= dwarf_clist
->line
;
2776 plinep
= dwarf_csect
->psaa
;
2777 /* check for file change */
2778 if (!(inx
== dwarf_csect
->file
)) {
2779 saa_write8(plinep
,DW_LNS_set_file
);
2780 saa_write8(plinep
,inx
);
2781 dwarf_csect
->file
= inx
;
2783 /* check for line change */
2785 /* test if in range of special op code */
2786 maxln
= line_base
+ line_range
;
2787 soc
= (ln
- line_base
) + (line_range
* aa
) + opcode_base
;
2788 if (ln
>= line_base
&& ln
< maxln
&& soc
< 256) {
2789 saa_write8(plinep
,soc
);
2791 saa_write8(plinep
,DW_LNS_advance_line
);
2792 saa_wleb128s(plinep
,ln
);
2794 saa_write8(plinep
,DW_LNS_advance_pc
);
2795 saa_wleb128u(plinep
,aa
);
2797 saa_write8(plinep
,DW_LNS_copy
);
2799 dwarf_csect
->line
= currentline
;
2800 dwarf_csect
->offset
= s
->offset
;
2803 /* show change handled */
2808 static void dwarf_generate(void)
2812 struct linelist
*ftentry
;
2813 struct SAA
*paranges
, *ppubnames
, *pinfo
, *pabbrev
, *plines
, *plinep
;
2814 struct SAA
*parangesrel
, *plinesrel
, *pinforel
;
2815 struct sectlist
*psect
;
2816 size_t saalen
, linepoff
, totlen
, highaddr
;
2819 /* write epilogues for each line program range */
2820 /* and build aranges section */
2821 paranges
= saa_init(1L);
2822 parangesrel
= saa_init(1L);
2823 saa_write16(paranges
,2); /* dwarf version */
2824 saa_write32(parangesrel
, paranges
->datalen
+4);
2825 saa_write32(parangesrel
, (dwarf_infosym
<< 8) + R_386_32
); /* reloc to info */
2826 saa_write32(parangesrel
, 0);
2827 saa_write32(paranges
,0); /* offset into info */
2828 saa_write8(paranges
,4); /* pointer size */
2829 saa_write8(paranges
,0); /* not segmented */
2830 saa_write32(paranges
,0); /* padding */
2831 /* iterate though sectlist entries */
2832 psect
= dwarf_fsect
;
2835 for (indx
= 0; indx
< dwarf_nsections
; indx
++) {
2836 plinep
= psect
->psaa
;
2837 /* Line Number Program Epilogue */
2838 saa_write8(plinep
,2); /* std op 2 */
2839 saa_write8(plinep
,(sects
[psect
->section
]->len
)-psect
->offset
);
2840 saa_write8(plinep
,DW_LNS_extended_op
);
2841 saa_write8(plinep
,1); /* operand length */
2842 saa_write8(plinep
,DW_LNE_end_sequence
);
2843 totlen
+= plinep
->datalen
;
2844 /* range table relocation entry */
2845 saa_write32(parangesrel
, paranges
->datalen
+ 4);
2846 saa_write32(parangesrel
, ((uint32_t) (psect
->section
+ 2) << 8) + R_386_32
);
2847 saa_write32(parangesrel
, (uint32_t) 0);
2848 /* range table entry */
2849 saa_write32(paranges
,0x0000); /* range start */
2850 saa_write32(paranges
,sects
[psect
->section
]->len
); /* range length */
2851 highaddr
+= sects
[psect
->section
]->len
;
2852 /* done with this entry */
2853 psect
= psect
->next
;
2855 saa_write32(paranges
,0); /* null address */
2856 saa_write32(paranges
,0); /* null length */
2857 saalen
= paranges
->datalen
;
2858 arangeslen
= saalen
+ 4;
2859 arangesbuf
= pbuf
= nasm_malloc(arangeslen
);
2860 WRITELONG(pbuf
,saalen
); /* initial length */
2861 saa_rnbytes(paranges
, pbuf
, saalen
);
2863 } else if (is_elfx32()) {
2864 /* write epilogues for each line program range */
2865 /* and build aranges section */
2866 paranges
= saa_init(1L);
2867 parangesrel
= saa_init(1L);
2868 saa_write16(paranges
,3); /* dwarf version */
2869 saa_write32(parangesrel
, paranges
->datalen
+4);
2870 saa_write32(parangesrel
, (dwarf_infosym
<< 8) + R_X86_64_32
); /* reloc to info */
2871 saa_write32(parangesrel
, 0);
2872 saa_write32(paranges
,0); /* offset into info */
2873 saa_write8(paranges
,4); /* pointer size */
2874 saa_write8(paranges
,0); /* not segmented */
2875 saa_write32(paranges
,0); /* padding */
2876 /* iterate though sectlist entries */
2877 psect
= dwarf_fsect
;
2880 for (indx
= 0; indx
< dwarf_nsections
; indx
++) {
2881 plinep
= psect
->psaa
;
2882 /* Line Number Program Epilogue */
2883 saa_write8(plinep
,2); /* std op 2 */
2884 saa_write8(plinep
,(sects
[psect
->section
]->len
)-psect
->offset
);
2885 saa_write8(plinep
,DW_LNS_extended_op
);
2886 saa_write8(plinep
,1); /* operand length */
2887 saa_write8(plinep
,DW_LNE_end_sequence
);
2888 totlen
+= plinep
->datalen
;
2889 /* range table relocation entry */
2890 saa_write32(parangesrel
, paranges
->datalen
+ 4);
2891 saa_write32(parangesrel
, ((uint32_t) (psect
->section
+ 2) << 8) + R_X86_64_32
);
2892 saa_write32(parangesrel
, (uint32_t) 0);
2893 /* range table entry */
2894 saa_write32(paranges
,0x0000); /* range start */
2895 saa_write32(paranges
,sects
[psect
->section
]->len
); /* range length */
2896 highaddr
+= sects
[psect
->section
]->len
;
2897 /* done with this entry */
2898 psect
= psect
->next
;
2900 saa_write32(paranges
,0); /* null address */
2901 saa_write32(paranges
,0); /* null length */
2902 saalen
= paranges
->datalen
;
2903 arangeslen
= saalen
+ 4;
2904 arangesbuf
= pbuf
= nasm_malloc(arangeslen
);
2905 WRITELONG(pbuf
,saalen
); /* initial length */
2906 saa_rnbytes(paranges
, pbuf
, saalen
);
2909 nasm_assert(is_elf64());
2910 /* write epilogues for each line program range */
2911 /* and build aranges section */
2912 paranges
= saa_init(1L);
2913 parangesrel
= saa_init(1L);
2914 saa_write16(paranges
,3); /* dwarf version */
2915 saa_write64(parangesrel
, paranges
->datalen
+4);
2916 saa_write64(parangesrel
, (dwarf_infosym
<< 32) + R_X86_64_32
); /* reloc to info */
2917 saa_write64(parangesrel
, 0);
2918 saa_write32(paranges
,0); /* offset into info */
2919 saa_write8(paranges
,8); /* pointer size */
2920 saa_write8(paranges
,0); /* not segmented */
2921 saa_write32(paranges
,0); /* padding */
2922 /* iterate though sectlist entries */
2923 psect
= dwarf_fsect
;
2926 for (indx
= 0; indx
< dwarf_nsections
; indx
++) {
2927 plinep
= psect
->psaa
;
2928 /* Line Number Program Epilogue */
2929 saa_write8(plinep
,2); /* std op 2 */
2930 saa_write8(plinep
,(sects
[psect
->section
]->len
)-psect
->offset
);
2931 saa_write8(plinep
,DW_LNS_extended_op
);
2932 saa_write8(plinep
,1); /* operand length */
2933 saa_write8(plinep
,DW_LNE_end_sequence
);
2934 totlen
+= plinep
->datalen
;
2935 /* range table relocation entry */
2936 saa_write64(parangesrel
, paranges
->datalen
+ 4);
2937 saa_write64(parangesrel
, ((uint64_t) (psect
->section
+ 2) << 32) + R_X86_64_64
);
2938 saa_write64(parangesrel
, (uint64_t) 0);
2939 /* range table entry */
2940 saa_write64(paranges
,0x0000); /* range start */
2941 saa_write64(paranges
,sects
[psect
->section
]->len
); /* range length */
2942 highaddr
+= sects
[psect
->section
]->len
;
2943 /* done with this entry */
2944 psect
= psect
->next
;
2946 saa_write64(paranges
,0); /* null address */
2947 saa_write64(paranges
,0); /* null length */
2948 saalen
= paranges
->datalen
;
2949 arangeslen
= saalen
+ 4;
2950 arangesbuf
= pbuf
= nasm_malloc(arangeslen
);
2951 WRITELONG(pbuf
,saalen
); /* initial length */
2952 saa_rnbytes(paranges
, pbuf
, saalen
);
2956 /* build rela.aranges section */
2957 arangesrellen
= saalen
= parangesrel
->datalen
;
2958 arangesrelbuf
= pbuf
= nasm_malloc(arangesrellen
);
2959 saa_rnbytes(parangesrel
, pbuf
, saalen
);
2960 saa_free(parangesrel
);
2962 /* build pubnames section */
2963 ppubnames
= saa_init(1L);
2964 saa_write16(ppubnames
,3); /* dwarf version */
2965 saa_write32(ppubnames
,0); /* offset into info */
2966 saa_write32(ppubnames
,0); /* space used in info */
2967 saa_write32(ppubnames
,0); /* end of list */
2968 saalen
= ppubnames
->datalen
;
2969 pubnameslen
= saalen
+ 4;
2970 pubnamesbuf
= pbuf
= nasm_malloc(pubnameslen
);
2971 WRITELONG(pbuf
,saalen
); /* initial length */
2972 saa_rnbytes(ppubnames
, pbuf
, saalen
);
2973 saa_free(ppubnames
);
2976 /* build info section */
2977 pinfo
= saa_init(1L);
2978 pinforel
= saa_init(1L);
2979 saa_write16(pinfo
,2); /* dwarf version */
2980 saa_write32(pinforel
, pinfo
->datalen
+ 4);
2981 saa_write32(pinforel
, (dwarf_abbrevsym
<< 8) + R_386_32
); /* reloc to abbrev */
2982 saa_write32(pinforel
, 0);
2983 saa_write32(pinfo
,0); /* offset into abbrev */
2984 saa_write8(pinfo
,4); /* pointer size */
2985 saa_write8(pinfo
,1); /* abbrviation number LEB128u */
2986 saa_write32(pinforel
, pinfo
->datalen
+ 4);
2987 saa_write32(pinforel
, ((dwarf_fsect
->section
+ 2) << 8) + R_386_32
);
2988 saa_write32(pinforel
, 0);
2989 saa_write32(pinfo
,0); /* DW_AT_low_pc */
2990 saa_write32(pinforel
, pinfo
->datalen
+ 4);
2991 saa_write32(pinforel
, ((dwarf_fsect
->section
+ 2) << 8) + R_386_32
);
2992 saa_write32(pinforel
, 0);
2993 saa_write32(pinfo
,highaddr
); /* DW_AT_high_pc */
2994 saa_write32(pinforel
, pinfo
->datalen
+ 4);
2995 saa_write32(pinforel
, (dwarf_linesym
<< 8) + R_386_32
); /* reloc to line */
2996 saa_write32(pinforel
, 0);
2997 saa_write32(pinfo
,0); /* DW_AT_stmt_list */
2998 saa_wbytes(pinfo
, elf_module
, strlen(elf_module
)+1);
2999 saa_wbytes(pinfo
, nasm_signature
, strlen(nasm_signature
)+1);
3000 saa_write16(pinfo
,DW_LANG_Mips_Assembler
);
3001 saa_write8(pinfo
,2); /* abbrviation number LEB128u */
3002 saa_write32(pinforel
, pinfo
->datalen
+ 4);
3003 saa_write32(pinforel
, ((dwarf_fsect
->section
+ 2) << 8) + R_386_32
);
3004 saa_write32(pinforel
, 0);
3005 saa_write32(pinfo
,0); /* DW_AT_low_pc */
3006 saa_write32(pinfo
,0); /* DW_AT_frame_base */
3007 saa_write8(pinfo
,0); /* end of entries */
3008 saalen
= pinfo
->datalen
;
3009 infolen
= saalen
+ 4;
3010 infobuf
= pbuf
= nasm_malloc(infolen
);
3011 WRITELONG(pbuf
,saalen
); /* initial length */
3012 saa_rnbytes(pinfo
, pbuf
, saalen
);
3014 } else if (is_elfx32()) {
3015 /* build info section */
3016 pinfo
= saa_init(1L);
3017 pinforel
= saa_init(1L);
3018 saa_write16(pinfo
,3); /* dwarf version */
3019 saa_write32(pinforel
, pinfo
->datalen
+ 4);
3020 saa_write32(pinforel
, (dwarf_abbrevsym
<< 8) + R_X86_64_32
); /* reloc to abbrev */
3021 saa_write32(pinforel
, 0);
3022 saa_write32(pinfo
,0); /* offset into abbrev */
3023 saa_write8(pinfo
,4); /* pointer size */
3024 saa_write8(pinfo
,1); /* abbrviation number LEB128u */
3025 saa_write32(pinforel
, pinfo
->datalen
+ 4);
3026 saa_write32(pinforel
, ((dwarf_fsect
->section
+ 2) << 8) + R_X86_64_32
);
3027 saa_write32(pinforel
, 0);
3028 saa_write32(pinfo
,0); /* DW_AT_low_pc */
3029 saa_write32(pinforel
, pinfo
->datalen
+ 4);
3030 saa_write32(pinforel
, ((dwarf_fsect
->section
+ 2) << 8) + R_X86_64_32
);
3031 saa_write32(pinforel
, 0);
3032 saa_write32(pinfo
,highaddr
); /* DW_AT_high_pc */
3033 saa_write32(pinforel
, pinfo
->datalen
+ 4);
3034 saa_write32(pinforel
, (dwarf_linesym
<< 8) + R_X86_64_32
); /* reloc to line */
3035 saa_write32(pinforel
, 0);
3036 saa_write32(pinfo
,0); /* DW_AT_stmt_list */
3037 saa_wbytes(pinfo
, elf_module
, strlen(elf_module
)+1);
3038 saa_wbytes(pinfo
, nasm_signature
, strlen(nasm_signature
)+1);
3039 saa_write16(pinfo
,DW_LANG_Mips_Assembler
);
3040 saa_write8(pinfo
,2); /* abbrviation number LEB128u */
3041 saa_write32(pinforel
, pinfo
->datalen
+ 4);
3042 saa_write32(pinforel
, ((dwarf_fsect
->section
+ 2) << 8) + R_X86_64_32
);
3043 saa_write32(pinforel
, 0);
3044 saa_write32(pinfo
,0); /* DW_AT_low_pc */
3045 saa_write32(pinfo
,0); /* DW_AT_frame_base */
3046 saa_write8(pinfo
,0); /* end of entries */
3047 saalen
= pinfo
->datalen
;
3048 infolen
= saalen
+ 4;
3049 infobuf
= pbuf
= nasm_malloc(infolen
);
3050 WRITELONG(pbuf
,saalen
); /* initial length */
3051 saa_rnbytes(pinfo
, pbuf
, saalen
);
3054 nasm_assert(is_elf64());
3055 /* build info section */
3056 pinfo
= saa_init(1L);
3057 pinforel
= saa_init(1L);
3058 saa_write16(pinfo
,3); /* dwarf version */
3059 saa_write64(pinforel
, pinfo
->datalen
+ 4);
3060 saa_write64(pinforel
, (dwarf_abbrevsym
<< 32) + R_X86_64_32
); /* reloc to abbrev */
3061 saa_write64(pinforel
, 0);
3062 saa_write32(pinfo
,0); /* offset into abbrev */
3063 saa_write8(pinfo
,8); /* pointer size */
3064 saa_write8(pinfo
,1); /* abbrviation number LEB128u */
3065 saa_write64(pinforel
, pinfo
->datalen
+ 4);
3066 saa_write64(pinforel
, ((uint64_t)(dwarf_fsect
->section
+ 2) << 32) + R_X86_64_64
);
3067 saa_write64(pinforel
, 0);
3068 saa_write64(pinfo
,0); /* DW_AT_low_pc */
3069 saa_write64(pinforel
, pinfo
->datalen
+ 4);
3070 saa_write64(pinforel
, ((uint64_t)(dwarf_fsect
->section
+ 2) << 32) + R_X86_64_64
);
3071 saa_write64(pinforel
, 0);
3072 saa_write64(pinfo
,highaddr
); /* DW_AT_high_pc */
3073 saa_write64(pinforel
, pinfo
->datalen
+ 4);
3074 saa_write64(pinforel
, (dwarf_linesym
<< 32) + R_X86_64_32
); /* reloc to line */
3075 saa_write64(pinforel
, 0);
3076 saa_write32(pinfo
,0); /* DW_AT_stmt_list */
3077 saa_wbytes(pinfo
, elf_module
, strlen(elf_module
)+1);
3078 saa_wbytes(pinfo
, nasm_signature
, strlen(nasm_signature
)+1);
3079 saa_write16(pinfo
,DW_LANG_Mips_Assembler
);
3080 saa_write8(pinfo
,2); /* abbrviation number LEB128u */
3081 saa_write64(pinforel
, pinfo
->datalen
+ 4);
3082 saa_write64(pinforel
, ((uint64_t)(dwarf_fsect
->section
+ 2) << 32) + R_X86_64_64
);
3083 saa_write64(pinforel
, 0);
3084 saa_write64(pinfo
,0); /* DW_AT_low_pc */
3085 saa_write64(pinfo
,0); /* DW_AT_frame_base */
3086 saa_write8(pinfo
,0); /* end of entries */
3087 saalen
= pinfo
->datalen
;
3088 infolen
= saalen
+ 4;
3089 infobuf
= pbuf
= nasm_malloc(infolen
);
3090 WRITELONG(pbuf
,saalen
); /* initial length */
3091 saa_rnbytes(pinfo
, pbuf
, saalen
);
3095 /* build rela.info section */
3096 inforellen
= saalen
= pinforel
->datalen
;
3097 inforelbuf
= pbuf
= nasm_malloc(inforellen
);
3098 saa_rnbytes(pinforel
, pbuf
, saalen
);
3101 /* build abbrev section */
3102 pabbrev
= saa_init(1L);
3103 saa_write8(pabbrev
,1); /* entry number LEB128u */
3104 saa_write8(pabbrev
,DW_TAG_compile_unit
); /* tag LEB128u */
3105 saa_write8(pabbrev
,1); /* has children */
3106 /* the following attributes and forms are all LEB128u values */
3107 saa_write8(pabbrev
,DW_AT_low_pc
);
3108 saa_write8(pabbrev
,DW_FORM_addr
);
3109 saa_write8(pabbrev
,DW_AT_high_pc
);
3110 saa_write8(pabbrev
,DW_FORM_addr
);
3111 saa_write8(pabbrev
,DW_AT_stmt_list
);
3112 saa_write8(pabbrev
,DW_FORM_data4
);
3113 saa_write8(pabbrev
,DW_AT_name
);
3114 saa_write8(pabbrev
,DW_FORM_string
);
3115 saa_write8(pabbrev
,DW_AT_producer
);
3116 saa_write8(pabbrev
,DW_FORM_string
);
3117 saa_write8(pabbrev
,DW_AT_language
);
3118 saa_write8(pabbrev
,DW_FORM_data2
);
3119 saa_write16(pabbrev
,0); /* end of entry */
3120 /* LEB128u usage same as above */
3121 saa_write8(pabbrev
,2); /* entry number */
3122 saa_write8(pabbrev
,DW_TAG_subprogram
);
3123 saa_write8(pabbrev
,0); /* no children */
3124 saa_write8(pabbrev
,DW_AT_low_pc
);
3125 saa_write8(pabbrev
,DW_FORM_addr
);
3126 saa_write8(pabbrev
,DW_AT_frame_base
);
3127 saa_write8(pabbrev
,DW_FORM_data4
);
3128 saa_write16(pabbrev
,0); /* end of entry */
3129 /* Terminal zero entry */
3130 saa_write8(pabbrev
,0);
3131 abbrevlen
= saalen
= pabbrev
->datalen
;
3132 abbrevbuf
= pbuf
= nasm_malloc(saalen
);
3133 saa_rnbytes(pabbrev
, pbuf
, saalen
);
3136 /* build line section */
3138 plines
= saa_init(1L);
3139 saa_write8(plines
,1); /* Minimum Instruction Length */
3140 saa_write8(plines
,1); /* Initial value of 'is_stmt' */
3141 saa_write8(plines
,line_base
); /* Line Base */
3142 saa_write8(plines
,line_range
); /* Line Range */
3143 saa_write8(plines
,opcode_base
); /* Opcode Base */
3144 /* standard opcode lengths (# of LEB128u operands) */
3145 saa_write8(plines
,0); /* Std opcode 1 length */
3146 saa_write8(plines
,1); /* Std opcode 2 length */
3147 saa_write8(plines
,1); /* Std opcode 3 length */
3148 saa_write8(plines
,1); /* Std opcode 4 length */
3149 saa_write8(plines
,1); /* Std opcode 5 length */
3150 saa_write8(plines
,0); /* Std opcode 6 length */
3151 saa_write8(plines
,0); /* Std opcode 7 length */
3152 saa_write8(plines
,0); /* Std opcode 8 length */
3153 saa_write8(plines
,1); /* Std opcode 9 length */
3154 saa_write8(plines
,0); /* Std opcode 10 length */
3155 saa_write8(plines
,0); /* Std opcode 11 length */
3156 saa_write8(plines
,1); /* Std opcode 12 length */
3157 /* Directory Table */
3158 saa_write8(plines
,0); /* End of table */
3159 /* File Name Table */
3160 ftentry
= dwarf_flist
;
3161 for (indx
= 0; indx
< dwarf_numfiles
; indx
++) {
3162 saa_wbytes(plines
, ftentry
->filename
, (int32_t)(strlen(ftentry
->filename
) + 1));
3163 saa_write8(plines
,0); /* directory LEB128u */
3164 saa_write8(plines
,0); /* time LEB128u */
3165 saa_write8(plines
,0); /* size LEB128u */
3166 ftentry
= ftentry
->next
;
3168 saa_write8(plines
,0); /* End of table */
3169 linepoff
= plines
->datalen
;
3170 linelen
= linepoff
+ totlen
+ 10;
3171 linebuf
= pbuf
= nasm_malloc(linelen
);
3172 WRITELONG(pbuf
,linelen
-4); /* initial length */
3173 WRITESHORT(pbuf
,3); /* dwarf version */
3174 WRITELONG(pbuf
,linepoff
); /* offset to line number program */
3175 /* write line header */
3177 saa_rnbytes(plines
, pbuf
, saalen
); /* read a given no. of bytes */
3180 /* concatonate line program ranges */
3182 plinesrel
= saa_init(1L);
3183 psect
= dwarf_fsect
;
3185 for (indx
= 0; indx
< dwarf_nsections
; indx
++) {
3186 saa_write32(plinesrel
, linepoff
);
3187 saa_write32(plinesrel
, ((uint32_t) (psect
->section
+ 2) << 8) + R_386_32
);
3188 saa_write32(plinesrel
, (uint32_t) 0);
3189 plinep
= psect
->psaa
;
3190 saalen
= plinep
->datalen
;
3191 saa_rnbytes(plinep
, pbuf
, saalen
);
3195 /* done with this entry */
3196 psect
= psect
->next
;
3198 } else if (is_elfx32()) {
3199 for (indx
= 0; indx
< dwarf_nsections
; indx
++) {
3200 saa_write32(plinesrel
, linepoff
);
3201 saa_write32(plinesrel
, ((psect
->section
+ 2) << 8) + R_X86_64_32
);
3202 saa_write32(plinesrel
, 0);
3203 plinep
= psect
->psaa
;
3204 saalen
= plinep
->datalen
;
3205 saa_rnbytes(plinep
, pbuf
, saalen
);
3209 /* done with this entry */
3210 psect
= psect
->next
;
3213 nasm_assert(is_elf64());
3214 for (indx
= 0; indx
< dwarf_nsections
; indx
++) {
3215 saa_write64(plinesrel
, linepoff
);
3216 saa_write64(plinesrel
, ((uint64_t) (psect
->section
+ 2) << 32) + R_X86_64_64
);
3217 saa_write64(plinesrel
, (uint64_t) 0);
3218 plinep
= psect
->psaa
;
3219 saalen
= plinep
->datalen
;
3220 saa_rnbytes(plinep
, pbuf
, saalen
);
3224 /* done with this entry */
3225 psect
= psect
->next
;
3229 /* build rela.lines section */
3230 linerellen
=saalen
= plinesrel
->datalen
;
3231 linerelbuf
= pbuf
= nasm_malloc(linerellen
);
3232 saa_rnbytes(plinesrel
, pbuf
, saalen
);
3233 saa_free(plinesrel
);
3235 /* build frame section */
3237 framebuf
= pbuf
= nasm_malloc(framelen
);
3238 WRITELONG(pbuf
,framelen
-4); /* initial length */
3240 /* build loc section */
3242 locbuf
= pbuf
= nasm_malloc(loclen
);
3244 WRITELONG(pbuf
,0); /* null beginning offset */
3245 WRITELONG(pbuf
,0); /* null ending offset */
3246 } else if (is_elfx32()) {
3247 WRITELONG(pbuf
,0); /* null beginning offset */
3248 WRITELONG(pbuf
,0); /* null ending offset */
3250 nasm_assert(is_elf64());
3251 WRITEDLONG(pbuf
,0); /* null beginning offset */
3252 WRITEDLONG(pbuf
,0); /* null ending offset */
3256 static void dwarf_cleanup(void)
3258 nasm_free(arangesbuf
);
3259 nasm_free(arangesrelbuf
);
3260 nasm_free(pubnamesbuf
);
3262 nasm_free(inforelbuf
);
3263 nasm_free(abbrevbuf
);
3265 nasm_free(linerelbuf
);
3266 nasm_free(framebuf
);
3270 static void dwarf_findfile(const char * fname
)
3273 struct linelist
*match
;
3275 /* return if fname is current file name */
3276 if (dwarf_clist
&& !(strcmp(fname
, dwarf_clist
->filename
)))
3279 /* search for match */
3282 match
= dwarf_flist
;
3283 for (finx
= 0; finx
< dwarf_numfiles
; finx
++) {
3284 if (!(strcmp(fname
, match
->filename
))) {
3285 dwarf_clist
= match
;
3288 match
= match
->next
;
3292 /* add file name to end of list */
3293 dwarf_clist
= nasm_malloc(sizeof(struct linelist
));
3295 dwarf_clist
->line
= dwarf_numfiles
;
3296 dwarf_clist
->filename
= nasm_malloc(strlen(fname
) + 1);
3297 strcpy(dwarf_clist
->filename
,fname
);
3298 dwarf_clist
->next
= 0;
3299 if (!dwarf_flist
) { /* if first entry */
3300 dwarf_flist
= dwarf_elist
= dwarf_clist
;
3301 dwarf_clist
->last
= 0;
3302 } else { /* chain to previous entry */
3303 dwarf_elist
->next
= dwarf_clist
;
3304 dwarf_elist
= dwarf_clist
;
3308 static void dwarf_findsect(const int index
)
3311 struct sectlist
*match
;
3314 /* return if index is current section index */
3315 if (dwarf_csect
&& (dwarf_csect
->section
== index
))
3318 /* search for match */
3321 match
= dwarf_fsect
;
3322 for (sinx
= 0; sinx
< dwarf_nsections
; sinx
++) {
3323 if (match
->section
== index
) {
3324 dwarf_csect
= match
;
3327 match
= match
->next
;
3331 /* add entry to end of list */
3332 dwarf_csect
= nasm_malloc(sizeof(struct sectlist
));
3334 dwarf_csect
->psaa
= plinep
= saa_init(1L);
3335 dwarf_csect
->line
= 1;
3336 dwarf_csect
->offset
= 0;
3337 dwarf_csect
->file
= 1;
3338 dwarf_csect
->section
= index
;
3339 dwarf_csect
->next
= 0;
3340 /* set relocatable address at start of line program */
3341 saa_write8(plinep
,DW_LNS_extended_op
);
3342 saa_write8(plinep
,is_elf64() ? 9 : 5); /* operand length */
3343 saa_write8(plinep
,DW_LNE_set_address
);
3345 saa_write64(plinep
,0); /* Start Address */
3347 saa_write32(plinep
,0); /* Start Address */
3349 if (!dwarf_fsect
) { /* if first entry */
3350 dwarf_fsect
= dwarf_esect
= dwarf_csect
;
3351 dwarf_csect
->last
= 0;
3352 } else { /* chain to previous entry */
3353 dwarf_esect
->next
= dwarf_csect
;
3354 dwarf_esect
= dwarf_csect
;
3358 #endif /* defined(OF_ELF32) || defined(OF_ELF64) || defined(OF_ELFX32) */