1 /* outelf64.c output routines for the Netwide Assembler to produce
2 * ELF64 (x86_64 of course) object file format
4 * The Netwide Assembler is copyright (C) 1996 Simon Tatham and
5 * Julian Hall. All rights reserved. The software is
6 * redistributable under the license given in the file "LICENSE"
7 * distributed in the NASM archive.
24 /* Definitions in lieu of elf.h */
25 #define SHT_NULL 0 /* Inactive section header */
26 #define SHT_PROGBITS 1 /* Program defined content */
27 #define SHT_RELA 4 /* Relocation entries with addends */
28 #define SHT_NOBITS 8 /* Section requires no space in file */
29 #define SHF_WRITE (1 << 0) /* Writable */
30 #define SHF_ALLOC (1 << 1) /* Occupies memory during execution */
31 #define SHF_EXECINSTR (1 << 2) /* Executable */
32 #define SHN_ABS 0xfff1 /* Associated symbol is absolute */
33 #define SHN_COMMON 0xfff2 /* Associated symbol is common */
34 #define R_X86_64_NONE 0 /* No reloc */
35 #define R_X86_64_64 1 /* Direct 64 bit */
36 #define R_X86_64_PC32 2 /* PC relative 32 bit signed */
37 #define R_X86_64_GOT32 3 /* 32 bit GOT entry */
38 #define R_X86_64_PLT32 4 /* 32 bit PLT address */
39 #define R_X86_64_COPY 5 /* Copy symbol at runtime */
40 #define R_X86_64_GLOB_DAT 6 /* Create GOT entry */
41 #define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */
42 #define R_X86_64_RELATIVE 8 /* Adjust by program base */
43 #define R_X86_64_GOTPCREL 9 /* 32 bit signed PC relative
45 #define R_X86_64_32 10 /* Direct 32 bit zero extended */
46 #define R_X86_64_32S 11 /* Direct 32 bit sign extended */
47 #define R_X86_64_16 12 /* Direct 16 bit zero extended */
48 #define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */
49 #define R_X86_64_8 14 /* Direct 8 bit sign extended */
50 #define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */
51 #define R_X86_64_DTPMOD64 16 /* ID of module containing symbol */
52 #define R_X86_64_DTPOFF64 17 /* Offset in module's TLS block */
53 #define R_X86_64_TPOFF64 18 /* Offset in initial TLS block */
54 #define R_X86_64_TLSGD 19 /* 32 bit signed PC relative offset
55 to two GOT entries for GD symbol */
56 #define R_X86_64_TLSLD 20 /* 32 bit signed PC relative offset
57 to two GOT entries for LD symbol */
58 #define R_X86_64_DTPOFF32 21 /* Offset in TLS block */
59 #define R_X86_64_GOTTPOFF 22 /* 32 bit signed PC relative offset
60 to GOT entry for IE symbol */
61 #define R_X86_64_TPOFF32 23 /* Offset in initial TLS block */
62 #define R_X86_64_PC64 24 /* word64 S + A - P */
63 #define R_X86_64_GOTOFF64 25 /* word64 S + A - GOT */
64 #define R_X86_64_GOTPC32 26 /* word32 GOT + A - P */
65 #define R_X86_64_GOT64 27 /* word64 G + A */
66 #define R_X86_64_GOTPCREL64 28 /* word64 G + GOT - P + A */
67 #define R_X86_64_GOTPC64 29 /* word64 GOT - P + A */
68 #define R_X86_64_GOTPLT64 30 /* word64 G + A */
69 #define R_X86_64_PLTOFF64 31 /* word64 L - GOT + A */
70 #define R_X86_64_SIZE32 32 /* word32 Z + A */
71 #define R_X86_64_SIZE64 33 /* word64 Z + A */
72 #define R_X86_64_GOTPC32_TLSDESC 34 /* word32 */
73 #define R_X86_64_TLSDESC_CALL 35 /* none */
74 #define R_X86_64_TLSDESC 36 /* word64×2 */
75 #define ET_REL 1 /* Relocatable file */
76 #define EM_X86_64 62 /* AMD x86-64 architecture */
77 #define STT_NOTYPE 0 /* Symbol type is unspecified */
78 #define STT_OBJECT 1 /* Symbol is a data object */
79 #define STT_FUNC 2 /* Symbol is a code object */
80 #define STT_SECTION 3 /* Symbol associated with a section */
81 #define STT_FILE 4 /* Symbol's name is file name */
82 #define STT_COMMON 5 /* Symbol is a common data object */
83 #define STT_TLS 6 /* Symbol is thread-local data object*/
84 #define STT_NUM 7 /* Number of defined types. */
86 /* Definitions in lieu of dwarf.h */
87 #define DW_TAG_compile_unit 0x11
88 #define DW_TAG_subprogram 0x2e
89 #define DW_AT_name 0x03
90 #define DW_AT_stmt_list 0x10
91 #define DW_AT_low_pc 0x11
92 #define DW_AT_high_pc 0x12
93 #define DW_AT_language 0x13
94 #define DW_AT_producer 0x25
95 #define DW_AT_frame_base 0x40
96 #define DW_FORM_addr 0x01
97 #define DW_FORM_data2 0x05
98 #define DW_FORM_data4 0x06
99 #define DW_FORM_string 0x08
100 #define DW_LNS_extended_op 0
101 #define DW_LNS_advance_pc 2
102 #define DW_LNS_advance_line 3
103 #define DW_LNS_set_file 4
104 #define DW_LNE_end_sequence 1
105 #define DW_LNE_set_address 2
106 #define DW_LNE_define_file 3
107 #define DW_LANG_Mips_Assembler 0x8001
109 #define SOC(ln,aa) ln - line_base + (line_range * aa) + opcode_base
111 typedef uint32_t Elf64_Word
;
112 typedef uint64_t Elf64_Xword
;
113 typedef uint64_t Elf64_Addr
;
114 typedef uint64_t Elf64_Off
;
117 Elf64_Word sh_name
; /* Section name (string tbl index) */
118 Elf64_Word sh_type
; /* Section type */
119 Elf64_Xword sh_flags
; /* Section flags */
120 Elf64_Addr sh_addr
; /* Section virtual addr at execution */
121 Elf64_Off sh_offset
; /* Section file offset */
122 Elf64_Xword sh_size
; /* Section size in bytes */
123 Elf64_Word sh_link
; /* Link to another section */
124 Elf64_Word sh_info
; /* Additional section information */
125 Elf64_Xword sh_addralign
; /* Section alignment */
126 Elf64_Xword sh_entsize
; /* Entry size if section holds table */
135 int64_t address
; /* relative to _start_ of section */
136 int64_t symbol
; /* symbol index */
137 int type
; /* type of relocation */
141 int32_t strpos
; /* string table position of name */
142 int32_t section
; /* section ID of the symbol */
143 int type
; /* symbol type */
144 int other
; /* symbol visibility */
145 int64_t value
; /* address, or COMMON variable align */
146 int32_t size
; /* size of symbol */
147 int32_t globnum
; /* symbol table offset if global */
148 struct Symbol
*next
; /* list of globals in each section */
149 struct Symbol
*nextfwd
; /* list of unresolved-size symbols */
150 char *name
; /* used temporarily if in above list */
158 int32_t index
; /* index into sects array */
159 uint32_t type
; /* SHT_PROGBITS or SHT_NOBITS */
160 uint64_t align
; /* alignment: power of two */
161 uint64_t flags
; /* section flags */
165 struct Reloc
*head
, **tail
;
166 struct Symbol
*gsyms
; /* global symbols in section */
169 #define SECT_DELTA 32
170 static struct Section
**sects
;
171 static int nsects
, sectlen
;
173 #define SHSTR_DELTA 256
174 static char *shstrtab
;
175 static int shstrtablen
, shstrtabsize
;
177 static struct SAA
*syms
;
178 static uint32_t nlocals
, nglobs
;
180 static int32_t def_seg
;
182 static struct RAA
*bsym
;
184 static struct SAA
*strs
;
185 static uint32_t strslen
;
189 static evalfunc evaluate
;
191 static struct Symbol
*fwds
;
193 static char elf_module
[FILENAME_MAX
];
195 static uint8_t elf_osabi
= 0; /* Default OSABI = 0 (System V or Linux) */
196 static uint8_t elf_abiver
= 0; /* Current ABI version */
198 extern struct ofmt of_elf64
;
202 #define SYM_GLOBAL 0x10
204 #define STV_DEFAULT 0
205 #define STV_INTERNAL 1
207 #define STV_PROTECTED 3
209 #define GLOBAL_TEMP_BASE 1048576 /* bigger than any reasonable sym id */
211 #define SEG_ALIGN 16 /* alignment of sections in file */
212 #define SEG_ALIGN_1 (SEG_ALIGN-1)
214 #define TY_DEBUGSYMLIN 0x40 /* internal call to debug_out */
216 static const char align_str
[SEG_ALIGN
] = ""; /* ANSI will pad this with 0s */
218 static struct ELF_SECTDATA
{
223 static int elf_nsect
, nsections
;
224 static int64_t elf_foffs
;
226 static void elf_write(void);
227 static void elf_sect_write(struct Section
*, const uint8_t *,
229 static void elf_section_header(int, int, uint64_t, void *, bool, uint64_t, int, int,
231 static void elf_write_sections(void);
232 static struct SAA
*elf_build_symtab(int32_t *, int32_t *);
233 static struct SAA
*elf_build_reltab(uint64_t *, struct Reloc
*);
234 static void add_sectname(char *, char *);
236 /* type values for stabs debugging sections */
237 #define N_SO 0x64 /* ID for main source file */
238 #define N_SOL 0x84 /* ID for sub-source file */
239 #define N_BINCL 0x82 /* not currently used */
240 #define N_EINCL 0xA2 /* not currently used */
257 int section
; /* index into sects[] */
258 int segto
; /* internal section number */
259 char *name
; /* shallow-copied pointer of section name */
263 struct symlininfo info
;
266 struct linelist
*next
;
267 struct linelist
*last
;
276 struct sectlist
*next
;
277 struct sectlist
*last
;
280 /* common debug variables */
281 static int currentline
= 1;
282 static int debug_immcall
= 0;
284 /* stabs debug variables */
285 static struct linelist
*stabslines
= 0;
286 static int numlinestabs
= 0;
287 static char *stabs_filename
= 0;
288 static int symtabsection
;
289 static uint8_t *stabbuf
= 0, *stabstrbuf
= 0, *stabrelbuf
= 0;
290 static int stablen
, stabstrlen
, stabrellen
;
292 /* dwarf debug variables */
293 static struct linelist
*dwarf_flist
= 0, *dwarf_clist
= 0, *dwarf_elist
= 0;
294 static struct sectlist
*dwarf_fsect
= 0, *dwarf_csect
= 0, *dwarf_esect
= 0;
295 static int dwarf_numfiles
= 0, dwarf_nsections
;
296 static uint8_t *arangesbuf
= 0, *arangesrelbuf
= 0, *pubnamesbuf
= 0, *infobuf
= 0, *inforelbuf
= 0,
297 *abbrevbuf
= 0, *linebuf
= 0, *linerelbuf
= 0, *framebuf
= 0, *locbuf
= 0;
298 static int8_t line_base
= -5, line_range
= 14, opcode_base
= 13;
299 static int arangeslen
, arangesrellen
, pubnameslen
, infolen
, inforellen
,
300 abbrevlen
, linelen
, linerellen
, framelen
, loclen
;
301 static int64_t dwarf_infosym
, dwarf_abbrevsym
, dwarf_linesym
;
304 static struct dfmt df_dwarf
;
305 static struct dfmt df_stabs
;
306 static struct Symbol
*lastsym
;
308 /* common debugging routines */
309 void debug64_typevalue(int32_t);
310 void debug64_init(struct ofmt
*, void *, FILE *, efunc
);
311 void debug64_deflabel(char *, int32_t, int64_t, int, char *);
312 void debug64_directive(const char *, const char *);
314 /* stabs debugging routines */
315 void stabs64_linenum(const char *filename
, int32_t linenumber
, int32_t);
316 void stabs64_output(int, void *);
317 void stabs64_generate(void);
318 void stabs64_cleanup(void);
320 /* dwarf debugging routines */
321 void dwarf64_linenum(const char *filename
, int32_t linenumber
, int32_t);
322 void dwarf64_output(int, void *);
323 void dwarf64_generate(void);
324 void dwarf64_cleanup(void);
325 void dwarf64_findfile(const char *);
326 void dwarf64_findsect(const int);
329 * Special section numbers which are used to define ELF special
330 * symbols, which can be used with WRT to provide PIC relocation
333 static int32_t elf_gotpc_sect
, elf_gotoff_sect
;
334 static int32_t elf_got_sect
, elf_plt_sect
;
335 static int32_t elf_sym_sect
;
337 static void elf_init(FILE * fp
, efunc errfunc
, ldfunc ldef
, evalfunc eval
)
343 (void)ldef
; /* placate optimisers */
345 nsects
= sectlen
= 0;
346 syms
= saa_init((int32_t)sizeof(struct Symbol
));
347 nlocals
= nglobs
= 0;
350 saa_wbytes(strs
, "\0", 1L);
351 saa_wbytes(strs
, elf_module
, (int32_t)(strlen(elf_module
) + 1));
352 strslen
= 2 + strlen(elf_module
);
354 shstrtablen
= shstrtabsize
= 0;;
355 add_sectname("", "");
359 elf_gotpc_sect
= seg_alloc();
360 ldef("..gotpc", elf_gotpc_sect
+ 1, 0L, NULL
, false, false, &of_elf64
,
362 elf_gotoff_sect
= seg_alloc();
363 ldef("..gotoff", elf_gotoff_sect
+ 1, 0L, NULL
, false, false, &of_elf64
,
365 elf_got_sect
= seg_alloc();
366 ldef("..got", elf_got_sect
+ 1, 0L, NULL
, false, false, &of_elf64
,
368 elf_plt_sect
= seg_alloc();
369 ldef("..plt", elf_plt_sect
+ 1, 0L, NULL
, false, false, &of_elf64
,
371 elf_sym_sect
= seg_alloc();
372 ldef("..sym", elf_sym_sect
+ 1, 0L, NULL
, false, false, &of_elf64
,
375 def_seg
= seg_alloc();
379 static void elf_cleanup(int debuginfo
)
388 for (i
= 0; i
< nsects
; i
++) {
389 if (sects
[i
]->type
!= SHT_NOBITS
)
390 saa_free(sects
[i
]->data
);
392 saa_free(sects
[i
]->rel
);
393 while (sects
[i
]->head
) {
395 sects
[i
]->head
= sects
[i
]->head
->next
;
403 if (of_elf64
.current_dfmt
) {
404 of_elf64
.current_dfmt
->cleanup();
407 /* add entry to the elf .shstrtab section */
408 static void add_sectname(char *firsthalf
, char *secondhalf
)
410 int len
= strlen(firsthalf
) + strlen(secondhalf
);
411 while (shstrtablen
+ len
+ 1 > shstrtabsize
)
412 shstrtab
= nasm_realloc(shstrtab
, (shstrtabsize
+= SHSTR_DELTA
));
413 strcpy(shstrtab
+ shstrtablen
, firsthalf
);
414 strcat(shstrtab
+ shstrtablen
, secondhalf
);
415 shstrtablen
+= len
+ 1;
418 static int elf_make_section(char *name
, int type
, int flags
, int align
)
422 s
= nasm_malloc(sizeof(*s
));
424 if (type
!= SHT_NOBITS
)
425 s
->data
= saa_init(1L);
428 s
->len
= s
->size
= 0;
430 if (!strcmp(name
, ".text"))
433 s
->index
= seg_alloc();
434 add_sectname("", name
);
435 s
->name
= nasm_malloc(1 + strlen(name
));
436 strcpy(s
->name
, name
);
442 if (nsects
>= sectlen
)
444 nasm_realloc(sects
, (sectlen
+= SECT_DELTA
) * sizeof(*sects
));
450 static int32_t elf_section_names(char *name
, int pass
, int *bits
)
453 unsigned flags_and
, flags_or
;
454 uint64_t type
, align
;
458 * Default is 64 bits.
466 while (*p
&& !nasm_isspace(*p
))
470 flags_and
= flags_or
= type
= align
= 0;
472 while (*p
&& nasm_isspace(*p
))
476 while (*p
&& !nasm_isspace(*p
))
480 while (*p
&& nasm_isspace(*p
))
483 if (!nasm_strnicmp(q
, "align=", 6)) {
487 if ((align
- 1) & align
) { /* means it's not a power of two */
488 error(ERR_NONFATAL
, "section alignment %d is not"
489 " a power of two", align
);
492 } else if (!nasm_stricmp(q
, "alloc")) {
493 flags_and
|= SHF_ALLOC
;
494 flags_or
|= SHF_ALLOC
;
495 } else if (!nasm_stricmp(q
, "noalloc")) {
496 flags_and
|= SHF_ALLOC
;
497 flags_or
&= ~SHF_ALLOC
;
498 } else if (!nasm_stricmp(q
, "exec")) {
499 flags_and
|= SHF_EXECINSTR
;
500 flags_or
|= SHF_EXECINSTR
;
501 } else if (!nasm_stricmp(q
, "noexec")) {
502 flags_and
|= SHF_EXECINSTR
;
503 flags_or
&= ~SHF_EXECINSTR
;
504 } else if (!nasm_stricmp(q
, "write")) {
505 flags_and
|= SHF_WRITE
;
506 flags_or
|= SHF_WRITE
;
507 } else if (!nasm_stricmp(q
, "nowrite")) {
508 flags_and
|= SHF_WRITE
;
509 flags_or
&= ~SHF_WRITE
;
510 } else if (!nasm_stricmp(q
, "progbits")) {
512 } else if (!nasm_stricmp(q
, "nobits")) {
517 if (!strcmp(name
, ".comment") ||
518 !strcmp(name
, ".shstrtab") ||
519 !strcmp(name
, ".symtab") || !strcmp(name
, ".strtab")) {
520 error(ERR_NONFATAL
, "attempt to redefine reserved section"
525 for (i
= 0; i
< nsects
; i
++)
526 if (!strcmp(name
, sects
[i
]->name
))
529 if (!strcmp(name
, ".text"))
530 i
= elf_make_section(name
, SHT_PROGBITS
,
531 SHF_ALLOC
| SHF_EXECINSTR
, 16);
532 else if (!strcmp(name
, ".rodata"))
533 i
= elf_make_section(name
, SHT_PROGBITS
, SHF_ALLOC
, 4);
534 else if (!strcmp(name
, ".data"))
535 i
= elf_make_section(name
, SHT_PROGBITS
,
536 SHF_ALLOC
| SHF_WRITE
, 4);
537 else if (!strcmp(name
, ".bss"))
538 i
= elf_make_section(name
, SHT_NOBITS
,
539 SHF_ALLOC
| SHF_WRITE
, 4);
541 i
= elf_make_section(name
, SHT_PROGBITS
, SHF_ALLOC
, 1);
543 sects
[i
]->type
= type
;
545 sects
[i
]->align
= align
;
546 sects
[i
]->flags
&= ~flags_and
;
547 sects
[i
]->flags
|= flags_or
;
548 } else if (pass
== 1) {
549 if ((type
&& sects
[i
]->type
!= type
)
550 || (align
&& sects
[i
]->align
!= align
)
551 || (flags_and
&& ((sects
[i
]->flags
& flags_and
) != flags_or
)))
552 error(ERR_WARNING
, "incompatible section attributes ignored on"
553 " redeclaration of section `%s'", name
);
556 return sects
[i
]->index
;
559 static void elf_deflabel(char *name
, int32_t segment
, int64_t offset
,
560 int is_global
, char *special
)
564 bool special_used
= false;
566 #if defined(DEBUG) && DEBUG>2
568 " elf_deflabel: %s, seg=%x, off=%x, is_global=%d, %s\n",
569 name
, segment
, offset
, is_global
, special
);
571 if (name
[0] == '.' && name
[1] == '.' && name
[2] != '@') {
573 * This is a NASM special symbol. We never allow it into
574 * the ELF symbol table, even if it's a valid one. If it
575 * _isn't_ a valid one, we should barf immediately.
577 if (strcmp(name
, "..gotpc") && strcmp(name
, "..gotoff") &&
578 strcmp(name
, "..got") && strcmp(name
, "..plt") &&
579 strcmp(name
, "..sym"))
580 error(ERR_NONFATAL
, "unrecognised special symbol `%s'", name
);
584 if (is_global
== 3) {
587 * Fix up a forward-reference symbol size from the first
590 for (s
= &fwds
; *s
; s
= &(*s
)->nextfwd
)
591 if (!strcmp((*s
)->name
, name
)) {
592 struct tokenval tokval
;
596 while (*p
&& !nasm_isspace(*p
))
598 while (*p
&& nasm_isspace(*p
))
602 tokval
.t_type
= TOKEN_INVALID
;
603 e
= evaluate(stdscan
, NULL
, &tokval
, NULL
, 1, error
, NULL
);
606 error(ERR_NONFATAL
, "cannot use relocatable"
607 " expression as symbol size");
609 (*s
)->size
= reloc_value(e
);
613 * Remove it from the list of unresolved sizes.
615 nasm_free((*s
)->name
);
619 return; /* it wasn't an important one */
622 saa_wbytes(strs
, name
, (int32_t)(1 + strlen(name
)));
623 strslen
+= 1 + strlen(name
);
625 lastsym
= sym
= saa_wstruct(syms
);
628 sym
->type
= is_global
? SYM_GLOBAL
: 0;
629 sym
->other
= STV_DEFAULT
;
631 if (segment
== NO_SEG
)
632 sym
->section
= SHN_ABS
;
635 sym
->section
= SHN_UNDEF
;
636 if (nsects
== 0 && segment
== def_seg
) {
638 if (segment
!= elf_section_names(".text", 2, &tempint
))
640 "strange segment conditions in ELF driver");
641 sym
->section
= nsects
;
643 for (i
= 0; i
< nsects
; i
++)
644 if (segment
== sects
[i
]->index
) {
645 sym
->section
= i
+ 1;
651 if (is_global
== 2) {
654 sym
->section
= SHN_COMMON
;
656 * We have a common variable. Check the special text to see
657 * if it's a valid number and power of two; if so, store it
658 * as the alignment for the common variable.
662 sym
->value
= readnum(special
, &err
);
664 error(ERR_NONFATAL
, "alignment constraint `%s' is not a"
665 " valid number", special
);
666 else if ((sym
->value
| (sym
->value
- 1)) != 2 * sym
->value
- 1)
667 error(ERR_NONFATAL
, "alignment constraint `%s' is not a"
668 " power of two", special
);
672 sym
->value
= (sym
->section
== SHN_UNDEF
? 0 : offset
);
674 if (sym
->type
== SYM_GLOBAL
) {
676 * If sym->section == SHN_ABS, then the first line of the
677 * else section would cause a core dump, because its a reference
678 * beyond the end of the section array.
679 * This behaviour is exhibited by this code:
682 * To avoid such a crash, such requests are silently discarded.
683 * This may not be the best solution.
685 if (sym
->section
== SHN_UNDEF
|| sym
->section
== SHN_COMMON
) {
686 bsym
= raa_write(bsym
, segment
, nglobs
);
687 } else if (sym
->section
!= SHN_ABS
) {
689 * This is a global symbol; so we must add it to the linked
690 * list of global symbols in its section. We'll push it on
691 * the beginning of the list, because it doesn't matter
692 * much which end we put it on and it's easier like this.
694 * In addition, we check the special text for symbol
695 * type and size information.
697 sym
->next
= sects
[sym
->section
- 1]->gsyms
;
698 sects
[sym
->section
- 1]->gsyms
= sym
;
701 int n
= strcspn(special
, " \t");
703 if (!nasm_strnicmp(special
, "function", n
))
704 sym
->type
|= STT_FUNC
;
705 else if (!nasm_strnicmp(special
, "data", n
) ||
706 !nasm_strnicmp(special
, "object", n
))
707 sym
->type
|= STT_OBJECT
;
708 else if (!nasm_strnicmp(special
, "notype", n
))
709 sym
->type
|= STT_NOTYPE
;
711 error(ERR_NONFATAL
, "unrecognised symbol type `%.*s'",
715 while (nasm_isspace(*special
))
718 n
= strcspn(special
, " \t");
719 if (!nasm_strnicmp(special
, "default", n
))
720 sym
->other
= STV_DEFAULT
;
721 else if (!nasm_strnicmp(special
, "internal", n
))
722 sym
->other
= STV_INTERNAL
;
723 else if (!nasm_strnicmp(special
, "hidden", n
))
724 sym
->other
= STV_HIDDEN
;
725 else if (!nasm_strnicmp(special
, "protected", n
))
726 sym
->other
= STV_PROTECTED
;
733 struct tokenval tokval
;
736 char *saveme
= stdscan_bufptr
; /* bugfix? fbk 8/10/00 */
738 while (special
[n
] && nasm_isspace(special
[n
]))
741 * We have a size expression; attempt to
745 stdscan_bufptr
= special
+ n
;
746 tokval
.t_type
= TOKEN_INVALID
;
747 e
= evaluate(stdscan
, NULL
, &tokval
, &fwd
, 0, error
,
752 sym
->name
= nasm_strdup(name
);
755 error(ERR_NONFATAL
, "cannot use relocatable"
756 " expression as symbol size");
758 sym
->size
= reloc_value(e
);
760 stdscan_bufptr
= saveme
; /* bugfix? fbk 8/10/00 */
765 sym
->globnum
= nglobs
;
770 if (special
&& !special_used
)
771 error(ERR_NONFATAL
, "no special symbol features supported here");
774 static void elf_add_reloc(struct Section
*sect
, int32_t segment
, int type
)
777 r
= *sect
->tail
= nasm_malloc(sizeof(struct Reloc
));
778 sect
->tail
= &r
->next
;
781 r
->address
= sect
->len
;
782 if (segment
== NO_SEG
)
787 for (i
= 0; i
< nsects
; i
++)
788 if (segment
== sects
[i
]->index
)
791 r
->symbol
= GLOBAL_TEMP_BASE
+ raa_read(bsym
, segment
);
799 * This routine deals with ..got and ..sym relocations: the more
800 * complicated kinds. In shared-library writing, some relocations
801 * with respect to global symbols must refer to the precise symbol
802 * rather than referring to an offset from the base of the section
803 * _containing_ the symbol. Such relocations call to this routine,
804 * which searches the symbol list for the symbol in question.
806 * R_386_GOT32 references require the _exact_ symbol address to be
807 * used; R_386_32 references can be at an offset from the symbol.
808 * The boolean argument `exact' tells us this.
810 * Return value is the adjusted value of `addr', having become an
811 * offset from the symbol rather than the section. Should always be
812 * zero when returning from an exact call.
814 * Limitation: if you define two symbols at the same place,
815 * confusion will occur.
817 * Inefficiency: we search, currently, using a linked list which
818 * isn't even necessarily sorted.
820 static int32_t elf_add_gsym_reloc(struct Section
*sect
,
821 int32_t segment
, int64_t offset
,
822 int type
, bool exact
)
826 struct Symbol
*sym
, *sm
;
830 * First look up the segment/offset pair and find a global
831 * symbol corresponding to it. If it's not one of our segments,
832 * then it must be an external symbol, in which case we're fine
833 * doing a normal elf_add_reloc after first sanity-checking
834 * that the offset from the symbol is zero.
837 for (i
= 0; i
< nsects
; i
++)
838 if (segment
== sects
[i
]->index
) {
843 if (exact
&& offset
!= 0)
844 error(ERR_NONFATAL
, "unable to find a suitable global symbol"
845 " for this reference");
847 elf_add_reloc(sect
, segment
, type
);
853 * Find a symbol pointing _exactly_ at this one.
855 for (sym
= s
->gsyms
; sym
; sym
= sym
->next
)
856 if (sym
->value
== offset
)
860 * Find the nearest symbol below this one.
863 for (sm
= s
->gsyms
; sm
; sm
= sm
->next
)
864 if (sm
->value
<= offset
&& (!sym
|| sm
->value
> sym
->value
))
868 error(ERR_NONFATAL
, "unable to find a suitable global symbol"
869 " for this reference");
873 r
= *sect
->tail
= nasm_malloc(sizeof(struct Reloc
));
874 sect
->tail
= &r
->next
;
877 r
->address
= sect
->len
;
878 r
->symbol
= GLOBAL_TEMP_BASE
+ sym
->globnum
;
883 return offset
- sym
->value
;
886 static void elf_out(int32_t segto
, const void *data
,
887 enum out_type type
, uint64_t size
,
888 int32_t segment
, int32_t wrt
)
892 uint8_t mydata
[16], *p
;
894 static struct symlininfo sinfo
;
896 #if defined(DEBUG) && DEBUG>2
897 if (data
) fprintf(stderr
,
898 " elf_out line: %d type: %x seg: %d segto: %d bytes: %x data: %"PRIx64
"\n",
899 currentline
, type
, segment
, segto
, size
, *(int64_t *)data
);
901 " elf_out line: %d type: %x seg: %d segto: %d bytes: %x\n",
902 currentline
, type
, segment
, segto
, size
);
906 * handle absolute-assembly (structure definitions)
908 if (segto
== NO_SEG
) {
909 if (type
!= OUT_RESERVE
)
910 error(ERR_NONFATAL
, "attempt to assemble code in [ABSOLUTE]"
916 for (i
= 0; i
< nsects
; i
++)
917 if (segto
== sects
[i
]->index
) {
922 int tempint
; /* ignored */
923 if (segto
!= elf_section_names(".text", 2, &tempint
))
924 error(ERR_PANIC
, "strange segment conditions in ELF driver");
926 s
= sects
[nsects
- 1];
930 /* invoke current debug_output routine */
931 if (of_elf64
.current_dfmt
) {
932 sinfo
.offset
= s
->len
;
935 sinfo
.name
= s
->name
;
936 of_elf64
.current_dfmt
->debug_output(TY_DEBUGSYMLIN
, &sinfo
);
938 /* end of debugging stuff */
940 if (s
->type
== SHT_NOBITS
&& type
!= OUT_RESERVE
) {
941 error(ERR_WARNING
, "attempt to initialize memory in"
942 " BSS section `%s': ignored", s
->name
);
943 if (type
== OUT_REL2ADR
)
945 else if (type
== OUT_REL4ADR
)
951 if (type
== OUT_RESERVE
) {
952 if (s
->type
== SHT_PROGBITS
) {
953 error(ERR_WARNING
, "uninitialized space declared in"
954 " non-BSS section `%s': zeroing", s
->name
);
955 elf_sect_write(s
, NULL
, size
);
958 } else if (type
== OUT_RAWDATA
) {
959 if (segment
!= NO_SEG
)
960 error(ERR_PANIC
, "OUT_RAWDATA with other than NO_SEG");
961 elf_sect_write(s
, data
, size
);
962 } else if (type
== OUT_ADDRESS
) {
964 addr
= *(int64_t *)data
;
965 if (segment
!= NO_SEG
) {
967 error(ERR_NONFATAL
, "ELF format does not support"
968 " segment base references");
973 elf_add_reloc(s
, segment
, R_X86_64_16
);
976 elf_add_reloc(s
, segment
, R_X86_64_32
);
979 elf_add_reloc(s
, segment
, R_X86_64_64
);
982 error(ERR_PANIC
, "internal error elf64-hpa-871");
985 } else if (wrt
== elf_gotpc_sect
+ 1) {
987 * The user will supply GOT relative to $$. ELF
988 * will let us have GOT relative to $. So we
989 * need to fix up the data item by $-$$.
992 elf_add_reloc(s
, segment
, R_X86_64_GOTPC32
);
993 } else if (wrt
== elf_gotoff_sect
+ 1) {
994 elf_add_reloc(s
, segment
, R_X86_64_GOTOFF64
);
995 } else if (wrt
== elf_got_sect
+ 1) {
996 addr
= elf_add_gsym_reloc(s
, segment
, addr
,
997 R_X86_64_GOT32
, true);
998 } else if (wrt
== elf_sym_sect
+ 1) {
1002 addr
= elf_add_gsym_reloc(s
, segment
, addr
,
1003 R_X86_64_16
, false);
1006 addr
= elf_add_gsym_reloc(s
, segment
, addr
,
1007 R_X86_64_32
, false);
1010 addr
= elf_add_gsym_reloc(s
, segment
, addr
,
1011 R_X86_64_64
, false);
1014 error(ERR_PANIC
, "internal error elf64-hpa-903");
1017 } else if (wrt
== elf_plt_sect
+ 1) {
1018 error(ERR_NONFATAL
, "ELF format cannot produce non-PC-"
1019 "relative PLT references");
1021 error(ERR_NONFATAL
, "ELF format does not support this"
1023 wrt
= NO_SEG
; /* we can at least _try_ to continue */
1029 WRITESHORT(p
, addr
);
1031 if (size
!= 8 && size
!= 4 && segment
!= NO_SEG
) {
1033 "Unsupported non-64-bit ELF relocation");
1035 if (size
== 4) WRITELONG(p
, addr
);
1036 else WRITEDLONG(p
, (int64_t)addr
);
1038 elf_sect_write(s
, mydata
, size
);
1039 } else if (type
== OUT_REL2ADR
) {
1040 if (segment
== segto
)
1041 error(ERR_PANIC
, "intra-segment OUT_REL2ADR");
1042 if (segment
!= NO_SEG
&& segment
% 2) {
1043 error(ERR_NONFATAL
, "ELF format does not support"
1044 " segment base references");
1046 if (wrt
== NO_SEG
) {
1047 elf_add_reloc(s
, segment
, R_X86_64_PC16
);
1050 "Unsupported non-32-bit ELF relocation [2]");
1054 WRITESHORT(p
, *(int64_t *)data
- size
);
1055 elf_sect_write(s
, mydata
, 2L);
1056 } else if (type
== OUT_REL4ADR
) {
1057 if (segment
== segto
)
1058 error(ERR_PANIC
, "intra-segment OUT_REL4ADR");
1059 if (segment
!= NO_SEG
&& segment
% 2) {
1060 error(ERR_NONFATAL
, "ELF64 format does not support"
1061 " segment base references");
1063 if (wrt
== NO_SEG
) {
1064 elf_add_reloc(s
, segment
, R_X86_64_PC32
);
1065 } else if (wrt
== elf_plt_sect
+ 1) {
1066 elf_add_reloc(s
, segment
, R_X86_64_PLT32
);
1067 } else if (wrt
== elf_gotpc_sect
+ 1) {
1068 elf_add_reloc(s
, segment
, R_X86_64_GOTPCREL
);
1069 } else if (wrt
== elf_gotoff_sect
+ 1) {
1070 elf_add_reloc(s
, segment
, R_X86_64_GOTOFF64
);
1071 } else if (wrt
== elf_got_sect
+ 1) {
1072 elf_add_reloc(s
, segment
, R_X86_64_GOTPCREL
);
1074 error(ERR_NONFATAL
, "ELF64 format does not support this"
1076 wrt
= NO_SEG
; /* we can at least _try_ to continue */
1080 WRITELONG(p
, *(int64_t *)data
- size
);
1081 elf_sect_write(s
, mydata
, 4L);
1085 static void elf_write(void)
1095 int32_t symtablen
, symtablocal
;
1098 * Work out how many sections we will have. We have SHN_UNDEF,
1099 * then the flexible user sections, then the four fixed
1100 * sections `.comment', `.shstrtab', `.symtab' and `.strtab',
1101 * then optionally relocation sections for the user sections.
1103 if (of_elf64
.current_dfmt
== &df_stabs
)
1105 else if (of_elf64
.current_dfmt
== &df_dwarf
)
1108 nsections
= 5; /* SHN_UNDEF and the fixed ones */
1110 add_sectname("", ".comment");
1111 add_sectname("", ".shstrtab");
1112 add_sectname("", ".symtab");
1113 add_sectname("", ".strtab");
1114 for (i
= 0; i
< nsects
; i
++) {
1115 nsections
++; /* for the section itself */
1116 if (sects
[i
]->head
) {
1117 nsections
++; /* for its relocations */
1118 add_sectname(".rela", sects
[i
]->name
);
1122 if (of_elf64
.current_dfmt
== &df_stabs
) {
1123 /* in case the debug information is wanted, just add these three sections... */
1124 add_sectname("", ".stab");
1125 add_sectname("", ".stabstr");
1126 add_sectname(".rel", ".stab");
1129 else if (of_elf64
.current_dfmt
== &df_dwarf
) {
1130 /* the dwarf debug standard specifies the following ten sections,
1131 not all of which are currently implemented,
1132 although all of them are defined. */
1133 #define debug_aranges (int64_t) (nsections-10)
1134 #define debug_info (int64_t) (nsections-7)
1135 #define debug_abbrev (int64_t) (nsections-5)
1136 #define debug_line (int64_t) (nsections-4)
1137 add_sectname("", ".debug_aranges");
1138 add_sectname(".rela", ".debug_aranges");
1139 add_sectname("", ".debug_pubnames");
1140 add_sectname("", ".debug_info");
1141 add_sectname(".rela", ".debug_info");
1142 add_sectname("", ".debug_abbrev");
1143 add_sectname("", ".debug_line");
1144 add_sectname(".rela", ".debug_line");
1145 add_sectname("", ".debug_frame");
1146 add_sectname("", ".debug_loc");
1154 2 + sprintf(comment
+ 1, "The Netwide Assembler %s", NASM_VER
);
1157 * Output the ELF header.
1159 fwrite("\177ELF\2\1\1", 7, 1, elffp
);
1160 fputc(elf_osabi
, elffp
);
1161 fputc(elf_abiver
, elffp
);
1162 fwrite("\0\0\0\0\0\0\0", 7, 1, elffp
);
1163 fwriteint16_t(ET_REL
, elffp
); /* relocatable file */
1164 fwriteint16_t(EM_X86_64
, elffp
); /* processor ID */
1165 fwriteint32_t(1L, elffp
); /* EV_CURRENT file format version */
1166 fwriteint64_t(0L, elffp
); /* no entry point */
1167 fwriteint64_t(0L, elffp
); /* no program header table */
1168 fwriteint64_t(0x40L
, elffp
); /* section headers straight after
1169 * ELF header plus alignment */
1170 fwriteint32_t(0L, elffp
); /* 386 defines no special flags */
1171 fwriteint16_t(0x40, elffp
); /* size of ELF header */
1172 fwriteint16_t(0, elffp
); /* no program header table, again */
1173 fwriteint16_t(0, elffp
); /* still no program header table */
1174 fwriteint16_t(sizeof(Elf64_Shdr
), elffp
); /* size of section header */
1175 fwriteint16_t(nsections
, elffp
); /* number of sections */
1176 fwriteint16_t(nsects
+ 2, elffp
); /* string table section index for
1177 * section header table */
1180 * Build the symbol table and relocation tables.
1182 symtab
= elf_build_symtab(&symtablen
, &symtablocal
);
1183 for (i
= 0; i
< nsects
; i
++)
1185 sects
[i
]->rel
= elf_build_reltab(§s
[i
]->rellen
,
1189 * Now output the section header table.
1192 elf_foffs
= 0x40 + sizeof(Elf64_Shdr
) * nsections
;
1193 align
= ((elf_foffs
+ SEG_ALIGN_1
) & ~SEG_ALIGN_1
) - elf_foffs
;
1196 elf_sects
= nasm_malloc(sizeof(*elf_sects
) * nsections
);
1197 elf_section_header(0, 0, 0, NULL
, false, 0L, 0, 0, 0, 0); /* SHN_UNDEF */
1198 scount
= 1; /* needed for the stabs debugging to track the symtable section */
1200 for (i
= 0; i
< nsects
; i
++) {
1201 elf_section_header(p
- shstrtab
, sects
[i
]->type
, sects
[i
]->flags
,
1202 (sects
[i
]->type
== SHT_PROGBITS
?
1203 sects
[i
]->data
: NULL
), true,
1204 sects
[i
]->len
, 0, 0, sects
[i
]->align
, 0);
1206 scount
++; /* ditto */
1208 elf_section_header(p
- shstrtab
, 1, 0, comment
, false, (int32_t)commlen
, 0, 0, 1, 0); /* .comment */
1209 scount
++; /* ditto */
1211 elf_section_header(p
- shstrtab
, 3, 0, shstrtab
, false, (int32_t)shstrtablen
, 0, 0, 1, 0); /* .shstrtab */
1212 scount
++; /* ditto */
1214 elf_section_header(p
- shstrtab
, 2, 0, symtab
, true, symtablen
, nsects
+ 4, symtablocal
, 4, 24); /* .symtab */
1215 symtabsection
= scount
; /* now we got the symtab section index in the ELF file */
1217 elf_section_header(p
- shstrtab
, 3, 0, strs
, true, strslen
, 0, 0, 1, 0); /* .strtab */
1218 for (i
= 0; i
< nsects
; i
++)
1219 if (sects
[i
]->head
) {
1221 elf_section_header(p
- shstrtab
,SHT_RELA
, 0, sects
[i
]->rel
, true,
1222 sects
[i
]->rellen
, nsects
+ 3, i
+ 1, 4, 24);
1224 if (of_elf64
.current_dfmt
== &df_stabs
) {
1225 /* for debugging information, create the last three sections
1226 which are the .stab , .stabstr and .rel.stab sections respectively */
1228 /* this function call creates the stab sections in memory */
1231 if ((stabbuf
) && (stabstrbuf
) && (stabrelbuf
)) {
1233 elf_section_header(p
- shstrtab
, 1, 0, stabbuf
, false, stablen
,
1234 nsections
- 2, 0, 4, 12);
1237 elf_section_header(p
- shstrtab
, 3, 0, stabstrbuf
, false,
1238 stabstrlen
, 0, 0, 4, 0);
1241 /* link -> symtable info -> section to refer to */
1242 elf_section_header(p
- shstrtab
, 9, 0, stabrelbuf
, false,
1243 stabrellen
, symtabsection
, nsections
- 3, 4,
1247 else if (of_elf64
.current_dfmt
== &df_dwarf
) {
1248 /* for dwarf debugging information, create the ten dwarf sections */
1250 /* this function call creates the dwarf sections in memory */
1251 if (dwarf_fsect
) dwarf64_generate();
1254 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, arangesbuf
, false,
1255 arangeslen
, 0, 0, 1, 0);
1257 elf_section_header(p
- shstrtab
, SHT_RELA
, 0, arangesrelbuf
, false,
1258 arangesrellen
, symtabsection
, debug_aranges
, 1, 24);
1260 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, pubnamesbuf
, false,
1261 pubnameslen
, 0, 0, 1, 0);
1263 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, infobuf
, false,
1264 infolen
, 0, 0, 1, 0);
1266 elf_section_header(p
- shstrtab
, SHT_RELA
, 0, inforelbuf
, false,
1267 inforellen
, symtabsection
, debug_info
, 1, 24);
1269 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, abbrevbuf
, false,
1270 abbrevlen
, 0, 0, 1, 0);
1272 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, linebuf
, false,
1273 linelen
, 0, 0, 1, 0);
1275 elf_section_header(p
- shstrtab
, SHT_RELA
, 0, linerelbuf
, false,
1276 linerellen
, symtabsection
, debug_line
, 1, 24);
1278 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, framebuf
, false,
1279 framelen
, 0, 0, 8, 0);
1281 elf_section_header(p
- shstrtab
, SHT_PROGBITS
, 0, locbuf
, false,
1282 loclen
, 0, 0, 1, 0);
1285 fwrite(align_str
, align
, 1, elffp
);
1288 * Now output the sections.
1290 elf_write_sections();
1292 nasm_free(elf_sects
);
1296 static struct SAA
*elf_build_symtab(int32_t *len
, int32_t *local
)
1298 struct SAA
*s
= saa_init(1L);
1300 uint8_t entry
[24], *p
;
1306 * First, an all-zeros entry, required by the ELF spec.
1308 saa_wbytes(s
, NULL
, 24L); /* null symbol table entry */
1313 * Next, an entry for the file name.
1316 WRITELONG(p
, 1); /* we know it's 1st entry in strtab */
1317 WRITESHORT(p
, STT_FILE
); /* type FILE */
1318 WRITESHORT(p
, SHN_ABS
);
1319 WRITEDLONG(p
, (uint64_t) 0); /* no value */
1320 WRITEDLONG(p
, (uint64_t) 0); /* no size either */
1321 saa_wbytes(s
, entry
, 24L);
1326 * Now some standard symbols defining the segments, for relocation
1329 for (i
= 1; i
<= nsects
; i
++) {
1331 WRITELONG(p
, 0); /* no symbol name */
1332 WRITESHORT(p
, STT_SECTION
); /* type, binding, and visibility */
1333 WRITESHORT(p
, i
); /* section id */
1334 WRITEDLONG(p
, (uint64_t) 0); /* offset zero */
1335 WRITEDLONG(p
, (uint64_t) 0); /* size zero */
1336 saa_wbytes(s
, entry
, 24L);
1343 * Now the other local symbols.
1346 while ((sym
= saa_rstruct(syms
))) {
1347 if (sym
->type
& SYM_GLOBAL
)
1350 WRITELONG(p
, sym
->strpos
); /* index into symbol string table */
1351 WRITECHAR(p
, sym
->type
); /* type and binding */
1352 WRITECHAR(p
, sym
->other
); /* visibility */
1353 WRITESHORT(p
, sym
->section
); /* index into section header table */
1354 WRITEDLONG(p
, (int64_t)sym
->value
); /* value of symbol */
1355 WRITEDLONG(p
, (int64_t)sym
->size
); /* size of symbol */
1356 saa_wbytes(s
, entry
, 24L);
1361 * dwarf needs symbols for debug sections
1362 * which are relocation targets.
1364 if (of_elf64
.current_dfmt
== &df_dwarf
) {
1365 dwarf_infosym
= *local
;
1367 WRITELONG(p
, 0); /* no symbol name */
1368 WRITESHORT(p
, STT_SECTION
); /* type, binding, and visibility */
1369 WRITESHORT(p
, debug_info
); /* section id */
1370 WRITEDLONG(p
, (uint64_t) 0); /* offset zero */
1371 WRITEDLONG(p
, (uint64_t) 0); /* size zero */
1372 saa_wbytes(s
, entry
, 24L);
1375 dwarf_abbrevsym
= *local
;
1377 WRITELONG(p
, 0); /* no symbol name */
1378 WRITESHORT(p
, STT_SECTION
); /* type, binding, and visibility */
1379 WRITESHORT(p
, debug_abbrev
); /* section id */
1380 WRITEDLONG(p
, (uint64_t) 0); /* offset zero */
1381 WRITEDLONG(p
, (uint64_t) 0); /* size zero */
1382 saa_wbytes(s
, entry
, 24L);
1385 dwarf_linesym
= *local
;
1387 WRITELONG(p
, 0); /* no symbol name */
1388 WRITESHORT(p
, STT_SECTION
); /* type, binding, and visibility */
1389 WRITESHORT(p
, debug_line
); /* section id */
1390 WRITEDLONG(p
, (uint64_t) 0); /* offset zero */
1391 WRITEDLONG(p
, (uint64_t) 0); /* size zero */
1392 saa_wbytes(s
, entry
, 24L);
1398 * Now the global symbols.
1401 while ((sym
= saa_rstruct(syms
))) {
1402 if (!(sym
->type
& SYM_GLOBAL
))
1405 WRITELONG(p
, sym
->strpos
);
1406 WRITECHAR(p
, sym
->type
); /* type and binding */
1407 WRITECHAR(p
, sym
->other
); /* visibility */
1408 WRITESHORT(p
, sym
->section
);
1409 WRITEDLONG(p
, (int64_t)sym
->value
);
1410 WRITEDLONG(p
, (int64_t)sym
->size
);
1411 saa_wbytes(s
, entry
, 24L);
1418 static struct SAA
*elf_build_reltab(uint64_t *len
, struct Reloc
*r
)
1421 uint8_t *p
, entry
[24];
1430 int64_t sym
= r
->symbol
;
1432 if (sym
>= GLOBAL_TEMP_BASE
)
1434 if (of_elf64
.current_dfmt
== &df_dwarf
)
1435 sym
+= -GLOBAL_TEMP_BASE
+ (nsects
+ 5) + nlocals
;
1436 else sym
+= -GLOBAL_TEMP_BASE
+ (nsects
+ 2) + nlocals
;
1439 WRITEDLONG(p
, r
->address
);
1440 WRITEDLONG(p
, (sym
<< 32) + r
->type
);
1441 WRITEDLONG(p
, (uint64_t) 0);
1442 saa_wbytes(s
, entry
, 24L);
1451 static void elf_section_header(int name
, int type
, uint64_t flags
,
1452 void *data
, bool is_saa
, uint64_t datalen
,
1453 int link
, int info
, int align
, int eltsize
)
1455 elf_sects
[elf_nsect
].data
= data
;
1456 elf_sects
[elf_nsect
].len
= datalen
;
1457 elf_sects
[elf_nsect
].is_saa
= is_saa
;
1460 fwriteint32_t((int32_t)name
, elffp
);
1461 fwriteint32_t((int32_t)type
, elffp
);
1462 fwriteint64_t((int64_t)flags
, elffp
);
1463 fwriteint64_t(0L, elffp
); /* no address, ever, in object files */
1464 fwriteint64_t(type
== 0 ? 0L : elf_foffs
, elffp
);
1465 fwriteint64_t(datalen
, elffp
);
1467 elf_foffs
+= (datalen
+ SEG_ALIGN_1
) & ~SEG_ALIGN_1
;
1468 fwriteint32_t((int32_t)link
, elffp
);
1469 fwriteint32_t((int32_t)info
, elffp
);
1470 fwriteint64_t((int64_t)align
, elffp
);
1471 fwriteint64_t((int64_t)eltsize
, elffp
);
1474 static void elf_write_sections(void)
1477 for (i
= 0; i
< elf_nsect
; i
++)
1478 if (elf_sects
[i
].data
) {
1479 int32_t len
= elf_sects
[i
].len
;
1480 int32_t reallen
= (len
+ SEG_ALIGN_1
) & ~SEG_ALIGN_1
;
1481 int32_t align
= reallen
- len
;
1482 if (elf_sects
[i
].is_saa
)
1483 saa_fpwrite(elf_sects
[i
].data
, elffp
);
1485 fwrite(elf_sects
[i
].data
, len
, 1, elffp
);
1486 fwrite(align_str
, align
, 1, elffp
);
1490 static void elf_sect_write(struct Section
*sect
,
1491 const uint8_t *data
, uint64_t len
)
1493 saa_wbytes(sect
->data
, data
, len
);
1497 static int32_t elf_segbase(int32_t segment
)
1502 static int elf_directive(char *directive
, char *value
, int pass
)
1508 if (!strcmp(directive
, "osabi")) {
1510 return 1; /* ignore in pass 2 */
1512 n
= readnum(value
, &err
);
1514 error(ERR_NONFATAL
, "`osabi' directive requires a parameter");
1517 if (n
< 0 || n
> 255) {
1518 error(ERR_NONFATAL
, "valid osabi numbers are 0 to 255");
1524 if ((p
= strchr(value
,',')) == NULL
)
1527 n
= readnum(p
+1, &err
);
1528 if (err
|| n
< 0 || n
> 255) {
1529 error(ERR_NONFATAL
, "invalid ABI version number (valid: 0 to 255)");
1540 static void elf_filename(char *inname
, char *outname
, efunc error
)
1542 strcpy(elf_module
, inname
);
1543 standard_extension(inname
, outname
, ".o", error
);
1546 extern macros_t elf_stdmac
[];
1548 static int elf_set_info(enum geninfo type
, char **val
)
1554 static struct dfmt df_dwarf
= {
1555 "ELF64 (X86_64) dwarf debug format for Linux",
1565 static struct dfmt df_stabs
= {
1566 "ELF64 (X86_64) stabs debug format for Linux",
1577 struct dfmt
*elf64_debugs_arr
[3] = { &df_stabs
, &df_dwarf
, NULL
};
1579 struct ofmt of_elf64
= {
1580 "ELF64 (x86_64) object files (e.g. Linux)",
1597 /* common debugging routines */
1598 void debug64_init(struct ofmt
*of
, void *id
, FILE * fp
, efunc error
)
1605 void debug64_deflabel(char *name
, int32_t segment
, int64_t offset
, int is_global
,
1615 void debug64_directive(const char *directive
, const char *params
)
1621 void debug64_typevalue(int32_t type
)
1623 int32_t stype
, ssize
;
1624 switch (TYM_TYPE(type
)) {
1663 stype
= STT_SECTION
;
1678 if (stype
== STT_OBJECT
&& lastsym
&& !lastsym
->type
) {
1679 lastsym
->size
= ssize
;
1680 lastsym
->type
= stype
;
1684 /* stabs debugging routines */
1687 void stabs64_linenum(const char *filename
, int32_t linenumber
, int32_t segto
)
1690 if (!stabs_filename
) {
1691 stabs_filename
= (char *)nasm_malloc(strlen(filename
) + 1);
1692 strcpy(stabs_filename
, filename
);
1694 if (strcmp(stabs_filename
, filename
)) {
1695 /* yep, a memory leak...this program is one-shot anyway, so who cares...
1696 in fact, this leak comes in quite handy to maintain a list of files
1697 encountered so far in the symbol lines... */
1699 /* why not nasm_free(stabs_filename); we're done with the old one */
1701 stabs_filename
= (char *)nasm_malloc(strlen(filename
) + 1);
1702 strcpy(stabs_filename
, filename
);
1706 currentline
= linenumber
;
1710 void stabs64_output(int type
, void *param
)
1712 struct symlininfo
*s
;
1713 struct linelist
*el
;
1714 if (type
== TY_DEBUGSYMLIN
) {
1715 if (debug_immcall
) {
1716 s
= (struct symlininfo
*)param
;
1717 if (!(sects
[s
->section
]->flags
& SHF_EXECINSTR
))
1718 return; /* line info is only collected for executable sections */
1720 el
= (struct linelist
*)nasm_malloc(sizeof(struct linelist
));
1721 el
->info
.offset
= s
->offset
;
1722 el
->info
.section
= s
->section
;
1723 el
->info
.name
= s
->name
;
1724 el
->line
= currentline
;
1725 el
->filename
= stabs_filename
;
1728 stabslines
->last
->next
= el
;
1729 stabslines
->last
= el
;
1732 stabslines
->last
= el
;
1739 #define WRITE_STAB(p,n_strx,n_type,n_other,n_desc,n_value) \
1741 WRITELONG(p,n_strx); \
1742 WRITECHAR(p,n_type); \
1743 WRITECHAR(p,n_other); \
1744 WRITESHORT(p,n_desc); \
1745 WRITELONG(p,n_value); \
1748 /* for creating the .stab , .stabstr and .rel.stab sections in memory */
1750 void stabs64_generate(void)
1752 int i
, numfiles
, strsize
, numstabs
= 0, currfile
, mainfileindex
;
1753 uint8_t *sbuf
, *ssbuf
, *rbuf
, *sptr
, *rptr
;
1757 struct linelist
*ptr
;
1761 allfiles
= (char **)nasm_malloc(numlinestabs
* sizeof(int8_t *));
1762 for (i
= 0; i
< numlinestabs
; i
++)
1766 if (numfiles
== 0) {
1767 allfiles
[0] = ptr
->filename
;
1770 for (i
= 0; i
< numfiles
; i
++) {
1771 if (!strcmp(allfiles
[i
], ptr
->filename
))
1774 if (i
>= numfiles
) {
1775 allfiles
[i
] = ptr
->filename
;
1782 fileidx
= (int *)nasm_malloc(numfiles
* sizeof(int));
1783 for (i
= 0; i
< numfiles
; i
++) {
1784 fileidx
[i
] = strsize
;
1785 strsize
+= strlen(allfiles
[i
]) + 1;
1788 for (i
= 0; i
< numfiles
; i
++) {
1789 if (!strcmp(allfiles
[i
], elf_module
)) {
1795 /* worst case size of the stab buffer would be:
1796 the sourcefiles changes each line, which would mean 1 SOL, 1 SYMLIN per line
1799 (uint8_t *)nasm_malloc((numlinestabs
* 2 + 3) *
1800 sizeof(struct stabentry
));
1802 ssbuf
= (uint8_t *)nasm_malloc(strsize
);
1804 rbuf
= (uint8_t *)nasm_malloc(numlinestabs
* 16 * (2 + 3));
1807 for (i
= 0; i
< numfiles
; i
++) {
1808 strcpy((char *)ssbuf
+ fileidx
[i
], allfiles
[i
]);
1812 stabstrlen
= strsize
; /* set global variable for length of stab strings */
1819 /* this is the first stab, its strx points to the filename of the
1820 the source-file, the n_desc field should be set to the number
1823 WRITE_STAB(sptr
, fileidx
[0], 0, 0, 0, strlen(allfiles
[0] + 12));
1825 /* this is the stab for the main source file */
1826 WRITE_STAB(sptr
, fileidx
[mainfileindex
], N_SO
, 0, 0, 0);
1828 /* relocation table entry */
1830 /* Since the symbol table has two entries before */
1831 /* the section symbols, the index in the info.section */
1832 /* member must be adjusted by adding 2 */
1834 WRITEDLONG(rptr
, (int64_t)(sptr
- sbuf
) - 4);
1835 WRITELONG(rptr
, R_X86_64_32
);
1836 WRITELONG(rptr
, ptr
->info
.section
+ 2);
1839 currfile
= mainfileindex
;
1843 if (strcmp(allfiles
[currfile
], ptr
->filename
)) {
1844 /* oops file has changed... */
1845 for (i
= 0; i
< numfiles
; i
++)
1846 if (!strcmp(allfiles
[i
], ptr
->filename
))
1849 WRITE_STAB(sptr
, fileidx
[currfile
], N_SOL
, 0, 0,
1853 /* relocation table entry */
1855 WRITEDLONG(rptr
, (int64_t)(sptr
- sbuf
) - 4);
1856 WRITELONG(rptr
, R_X86_64_32
);
1857 WRITELONG(rptr
, ptr
->info
.section
+ 2);
1860 WRITE_STAB(sptr
, 0, N_SLINE
, 0, ptr
->line
, ptr
->info
.offset
);
1863 /* relocation table entry */
1865 WRITEDLONG(rptr
, (int64_t)(sptr
- sbuf
) - 4);
1866 WRITELONG(rptr
, R_X86_64_32
);
1867 WRITELONG(rptr
, ptr
->info
.section
+ 2);
1873 ((struct stabentry
*)sbuf
)->n_desc
= numstabs
;
1875 nasm_free(allfiles
);
1878 stablen
= (sptr
- sbuf
);
1879 stabrellen
= (rptr
- rbuf
);
1885 void stabs64_cleanup(void)
1887 struct linelist
*ptr
, *del
;
1899 nasm_free(stabrelbuf
);
1901 nasm_free(stabstrbuf
);
1903 /* dwarf routines */
1906 void dwarf64_linenum(const char *filename
, int32_t linenumber
, int32_t segto
)
1909 dwarf64_findfile(filename
);
1911 currentline
= linenumber
;
1914 /* called from elf_out with type == TY_DEBUGSYMLIN */
1915 void dwarf64_output(int type
, void *param
)
1917 int ln
, aa
, inx
, maxln
, soc
;
1918 struct symlininfo
*s
;
1923 s
= (struct symlininfo
*)param
;
1924 /* line number info is only gathered for executable sections */
1925 if (!(sects
[s
->section
]->flags
& SHF_EXECINSTR
))
1927 /* Check if section index has changed */
1928 if (!(dwarf_csect
&& (dwarf_csect
->section
) == (s
->section
)))
1930 dwarf64_findsect(s
->section
);
1932 /* do nothing unless line or file has changed */
1935 ln
= currentline
- dwarf_csect
->line
;
1936 aa
= s
->offset
- dwarf_csect
->offset
;
1937 inx
= dwarf_clist
->line
;
1938 plinep
= dwarf_csect
->psaa
;
1939 /* check for file change */
1940 if (!(inx
== dwarf_csect
->file
))
1942 saa_write8(plinep
,DW_LNS_set_file
);
1943 saa_write8(plinep
,inx
);
1944 dwarf_csect
->file
= inx
;
1946 /* check for line change */
1949 /* test if in range of special op code */
1950 maxln
= line_base
+ line_range
;
1951 soc
= (ln
- line_base
) + (line_range
* aa
) + opcode_base
;
1952 if (ln
>= line_base
&& ln
< maxln
&& soc
< 256)
1954 saa_write8(plinep
,soc
);
1960 saa_write8(plinep
,DW_LNS_advance_line
);
1961 saa_wleb128s(plinep
,ln
);
1965 saa_write8(plinep
,DW_LNS_advance_pc
);
1966 saa_wleb128u(plinep
,aa
);
1969 dwarf_csect
->line
= currentline
;
1970 dwarf_csect
->offset
= s
->offset
;
1972 /* show change handled */
1978 void dwarf64_generate(void)
1980 static const char nasm_signature
[] = "NASM " NASM_VER
;
1983 struct linelist
*ftentry
;
1984 struct SAA
*paranges
, *ppubnames
, *pinfo
, *pabbrev
, *plines
, *plinep
;
1985 struct SAA
*parangesrel
, *plinesrel
, *pinforel
;
1986 struct sectlist
*psect
;
1987 size_t saalen
, linepoff
, totlen
, highaddr
;
1989 /* write epilogues for each line program range */
1990 /* and build aranges section */
1991 paranges
= saa_init(1L);
1992 parangesrel
= saa_init(1L);
1993 saa_write16(paranges
,3); /* dwarf version */
1994 saa_write64(parangesrel
, paranges
->datalen
+4);
1995 saa_write64(parangesrel
, (dwarf_infosym
<< 32) + R_X86_64_32
); /* reloc to info */
1996 saa_write64(parangesrel
, 0);
1997 saa_write32(paranges
,0); /* offset into info */
1998 saa_write8(paranges
,8); /* pointer size */
1999 saa_write8(paranges
,0); /* not segmented */
2000 saa_write32(paranges
,0); /* padding */
2001 /* iterate though sectlist entries */
2002 psect
= dwarf_fsect
;
2005 for (indx
= 0; indx
< dwarf_nsections
; indx
++)
2007 plinep
= psect
->psaa
;
2008 /* Line Number Program Epilogue */
2009 saa_write8(plinep
,2); /* std op 2 */
2010 saa_write8(plinep
,(sects
[psect
->section
]->len
)-psect
->offset
);
2011 saa_write8(plinep
,DW_LNS_extended_op
);
2012 saa_write8(plinep
,1); /* operand length */
2013 saa_write8(plinep
,DW_LNE_end_sequence
);
2014 totlen
+= plinep
->datalen
;
2015 /* range table relocation entry */
2016 saa_write64(parangesrel
, paranges
->datalen
+ 4);
2017 saa_write64(parangesrel
, ((uint64_t) (psect
->section
+ 2) << 32) + R_X86_64_64
);
2018 saa_write64(parangesrel
, (uint64_t) 0);
2019 /* range table entry */
2020 saa_write64(paranges
,0x0000); /* range start */
2021 saa_write64(paranges
,sects
[psect
->section
]->len
); /* range length */
2022 highaddr
+= sects
[psect
->section
]->len
;
2023 /* done with this entry */
2024 psect
= psect
->next
;
2026 saa_write64(paranges
,0); /* null address */
2027 saa_write64(paranges
,0); /* null length */
2028 saalen
= paranges
->datalen
;
2029 arangeslen
= saalen
+ 4;
2030 arangesbuf
= pbuf
= nasm_malloc(arangeslen
);
2031 WRITELONG(pbuf
,saalen
); /* initial length */
2032 saa_rnbytes(paranges
, pbuf
, saalen
);
2035 /* build rela.aranges section */
2036 arangesrellen
= saalen
= parangesrel
->datalen
;
2037 arangesrelbuf
= pbuf
= nasm_malloc(arangesrellen
);
2038 saa_rnbytes(parangesrel
, pbuf
, saalen
);
2039 saa_free(parangesrel
);
2041 /* build pubnames section */
2042 ppubnames
= saa_init(1L);
2043 saa_write16(ppubnames
,3); /* dwarf version */
2044 saa_write32(ppubnames
,0); /* offset into info */
2045 saa_write32(ppubnames
,0); /* space used in info */
2046 saa_write32(ppubnames
,0); /* end of list */
2047 saalen
= ppubnames
->datalen
;
2048 pubnameslen
= saalen
+ 4;
2049 pubnamesbuf
= pbuf
= nasm_malloc(pubnameslen
);
2050 WRITELONG(pbuf
,saalen
); /* initial length */
2051 saa_rnbytes(ppubnames
, pbuf
, saalen
);
2052 saa_free(ppubnames
);
2054 /* build info section */
2055 pinfo
= saa_init(1L);
2056 pinforel
= saa_init(1L);
2057 saa_write16(pinfo
,3); /* dwarf version */
2058 saa_write64(pinforel
, pinfo
->datalen
+ 4);
2059 saa_write64(pinforel
, (dwarf_abbrevsym
<< 32) + R_X86_64_32
); /* reloc to abbrev */
2060 saa_write64(pinforel
, 0);
2061 saa_write32(pinfo
,0); /* offset into abbrev */
2062 saa_write8(pinfo
,8); /* pointer size */
2063 saa_write8(pinfo
,1); /* abbrviation number LEB128u */
2064 saa_write64(pinforel
, pinfo
->datalen
+ 4);
2065 saa_write64(pinforel
, ((uint64_t)(dwarf_fsect
->section
+ 2) << 32) + R_X86_64_64
);
2066 saa_write64(pinforel
, 0);
2067 saa_write64(pinfo
,0); /* DW_AT_low_pc */
2068 saa_write64(pinforel
, pinfo
->datalen
+ 4);
2069 saa_write64(pinforel
, ((uint64_t)(dwarf_fsect
->section
+ 2) << 32) + R_X86_64_64
);
2070 saa_write64(pinforel
, 0);
2071 saa_write64(pinfo
,highaddr
); /* DW_AT_high_pc */
2072 saa_write64(pinforel
, pinfo
->datalen
+ 4);
2073 saa_write64(pinforel
, (dwarf_linesym
<< 32) + R_X86_64_32
); /* reloc to line */
2074 saa_write64(pinforel
, 0);
2075 saa_write32(pinfo
,0); /* DW_AT_stmt_list */
2076 saa_wbytes(pinfo
, elf_module
, strlen(elf_module
)+1);
2077 saa_wbytes(pinfo
, nasm_signature
, strlen(nasm_signature
)+1);
2078 saa_write16(pinfo
,DW_LANG_Mips_Assembler
);
2079 saa_write8(pinfo
,2); /* abbrviation number LEB128u */
2080 saa_write64(pinforel
, pinfo
->datalen
+ 4);
2081 saa_write64(pinforel
, ((uint64_t)(dwarf_fsect
->section
+ 2) << 32) + R_X86_64_64
);
2082 saa_write64(pinforel
, 0);
2083 saa_write64(pinfo
,0); /* DW_AT_low_pc */
2084 saa_write64(pinfo
,0); /* DW_AT_frame_base */
2085 saa_write8(pinfo
,0); /* end of entries */
2086 saalen
= pinfo
->datalen
;
2087 infolen
= saalen
+ 4;
2088 infobuf
= pbuf
= nasm_malloc(infolen
);
2089 WRITELONG(pbuf
,saalen
); /* initial length */
2090 saa_rnbytes(pinfo
, pbuf
, saalen
);
2093 /* build rela.info section */
2094 inforellen
= saalen
= pinforel
->datalen
;
2095 inforelbuf
= pbuf
= nasm_malloc(inforellen
);
2096 saa_rnbytes(pinforel
, pbuf
, saalen
);
2099 /* build abbrev section */
2100 pabbrev
= saa_init(1L);
2101 saa_write8(pabbrev
,1); /* entry number LEB128u */
2102 saa_write8(pabbrev
,DW_TAG_compile_unit
); /* tag LEB128u */
2103 saa_write8(pabbrev
,1); /* has children */
2104 /* the following attributes and forms are all LEB128u values */
2105 saa_write8(pabbrev
,DW_AT_low_pc
);
2106 saa_write8(pabbrev
,DW_FORM_addr
);
2107 saa_write8(pabbrev
,DW_AT_high_pc
);
2108 saa_write8(pabbrev
,DW_FORM_addr
);
2109 saa_write8(pabbrev
,DW_AT_stmt_list
);
2110 saa_write8(pabbrev
,DW_FORM_data4
);
2111 saa_write8(pabbrev
,DW_AT_name
);
2112 saa_write8(pabbrev
,DW_FORM_string
);
2113 saa_write8(pabbrev
,DW_AT_producer
);
2114 saa_write8(pabbrev
,DW_FORM_string
);
2115 saa_write8(pabbrev
,DW_AT_language
);
2116 saa_write8(pabbrev
,DW_FORM_data2
);
2117 saa_write16(pabbrev
,0); /* end of entry */
2118 /* LEB128u usage same as above */
2119 saa_write8(pabbrev
,2); /* entry number */
2120 saa_write8(pabbrev
,DW_TAG_subprogram
);
2121 saa_write8(pabbrev
,0); /* no children */
2122 saa_write8(pabbrev
,DW_AT_low_pc
);
2123 saa_write8(pabbrev
,DW_FORM_addr
);
2124 saa_write8(pabbrev
,DW_AT_frame_base
);
2125 saa_write8(pabbrev
,DW_FORM_data4
);
2126 saa_write16(pabbrev
,0); /* end of entry */
2127 abbrevlen
= saalen
= pabbrev
->datalen
;
2128 abbrevbuf
= pbuf
= nasm_malloc(saalen
);
2129 saa_rnbytes(pabbrev
, pbuf
, saalen
);
2132 /* build line section */
2134 plines
= saa_init(1L);
2135 saa_write8(plines
,1); /* Minimum Instruction Length */
2136 saa_write8(plines
,1); /* Initial value of 'is_stmt' */
2137 saa_write8(plines
,line_base
); /* Line Base */
2138 saa_write8(plines
,line_range
); /* Line Range */
2139 saa_write8(plines
,opcode_base
); /* Opcode Base */
2140 /* standard opcode lengths (# of LEB128u operands) */
2141 saa_write8(plines
,0); /* Std opcode 1 length */
2142 saa_write8(plines
,1); /* Std opcode 2 length */
2143 saa_write8(plines
,1); /* Std opcode 3 length */
2144 saa_write8(plines
,1); /* Std opcode 4 length */
2145 saa_write8(plines
,1); /* Std opcode 5 length */
2146 saa_write8(plines
,0); /* Std opcode 6 length */
2147 saa_write8(plines
,0); /* Std opcode 7 length */
2148 saa_write8(plines
,0); /* Std opcode 8 length */
2149 saa_write8(plines
,1); /* Std opcode 9 length */
2150 saa_write8(plines
,0); /* Std opcode 10 length */
2151 saa_write8(plines
,0); /* Std opcode 11 length */
2152 saa_write8(plines
,1); /* Std opcode 12 length */
2153 /* Directory Table */
2154 saa_write8(plines
,0); /* End of table */
2155 /* File Name Table */
2156 ftentry
= dwarf_flist
;
2157 for (indx
= 0;indx
<dwarf_numfiles
;indx
++)
2159 saa_wbytes(plines
, ftentry
->filename
, (int32_t)(strlen(ftentry
->filename
) + 1));
2160 saa_write8(plines
,0); /* directory LEB128u */
2161 saa_write8(plines
,0); /* time LEB128u */
2162 saa_write8(plines
,0); /* size LEB128u */
2163 ftentry
= ftentry
->next
;
2165 saa_write8(plines
,0); /* End of table */
2166 linepoff
= plines
->datalen
;
2167 linelen
= linepoff
+ totlen
+ 10;
2168 linebuf
= pbuf
= nasm_malloc(linelen
);
2169 WRITELONG(pbuf
,linelen
-4); /* initial length */
2170 WRITESHORT(pbuf
,3); /* dwarf version */
2171 WRITELONG(pbuf
,linepoff
); /* offset to line number program */
2172 /* write line header */
2174 saa_rnbytes(plines
, pbuf
, saalen
); /* read a given no. of bytes */
2177 /* concatonate line program ranges */
2179 plinesrel
= saa_init(1L);
2180 psect
= dwarf_fsect
;
2181 for (indx
= 0; indx
< dwarf_nsections
; indx
++)
2183 saa_write64(plinesrel
, linepoff
);
2184 saa_write64(plinesrel
, ((uint64_t) (psect
->section
+ 2) << 32) + R_X86_64_64
);
2185 saa_write64(plinesrel
, (uint64_t) 0);
2186 plinep
= psect
->psaa
;
2187 saalen
= plinep
->datalen
;
2188 saa_rnbytes(plinep
, pbuf
, saalen
);
2192 /* done with this entry */
2193 psect
= psect
->next
;
2197 /* build rela.lines section */
2198 linerellen
=saalen
= plinesrel
->datalen
;
2199 linerelbuf
= pbuf
= nasm_malloc(linerellen
);
2200 saa_rnbytes(plinesrel
, pbuf
, saalen
);
2201 saa_free(plinesrel
);
2203 /* build frame section */
2205 framebuf
= pbuf
= nasm_malloc(framelen
);
2206 WRITELONG(pbuf
,framelen
-4); /* initial length */
2208 /* build loc section */
2210 locbuf
= pbuf
= nasm_malloc(loclen
);
2211 WRITEDLONG(pbuf
,0); /* null beginning offset */
2212 WRITEDLONG(pbuf
,0); /* null ending offset */
2215 void dwarf64_cleanup(void)
2218 nasm_free(arangesbuf
);
2220 nasm_free(arangesrelbuf
);
2222 nasm_free(pubnamesbuf
);
2226 nasm_free(inforelbuf
);
2228 nasm_free(abbrevbuf
);
2232 nasm_free(linerelbuf
);
2234 nasm_free(framebuf
);
2238 void dwarf64_findfile(const char * fname
)
2241 struct linelist
*match
;
2243 /* return if fname is current file name */
2244 if (dwarf_clist
&& !(strcmp(fname
, dwarf_clist
->filename
))) return;
2245 /* search for match */
2251 match
= dwarf_flist
;
2252 for (finx
= 0; finx
< dwarf_numfiles
; finx
++)
2254 if (!(strcmp(fname
, match
->filename
)))
2256 dwarf_clist
= match
;
2261 /* add file name to end of list */
2262 dwarf_clist
= (struct linelist
*)nasm_malloc(sizeof(struct linelist
));
2264 dwarf_clist
->line
= dwarf_numfiles
;
2265 dwarf_clist
->filename
= nasm_malloc(strlen(fname
) + 1);
2266 strcpy(dwarf_clist
->filename
,fname
);
2267 dwarf_clist
->next
= 0;
2268 /* if first entry */
2271 dwarf_flist
= dwarf_elist
= dwarf_clist
;
2272 dwarf_clist
->last
= 0;
2274 /* chain to previous entry */
2277 dwarf_elist
->next
= dwarf_clist
;
2278 dwarf_elist
= dwarf_clist
;
2283 void dwarf64_findsect(const int index
)
2286 struct sectlist
*match
;
2288 /* return if index is current section index */
2289 if (dwarf_csect
&& (dwarf_csect
->section
== index
))
2293 /* search for match */
2299 match
= dwarf_fsect
;
2300 for (sinx
= 0; sinx
< dwarf_nsections
; sinx
++)
2302 if ((match
->section
== index
))
2304 dwarf_csect
= match
;
2307 match
= match
->next
;
2310 /* add entry to end of list */
2311 dwarf_csect
= (struct sectlist
*)nasm_malloc(sizeof(struct sectlist
));
2313 dwarf_csect
->psaa
= plinep
= saa_init(1L);
2314 dwarf_csect
->line
= 1;
2315 dwarf_csect
->offset
= 0;
2316 dwarf_csect
->file
= 1;
2317 dwarf_csect
->section
= index
;
2318 dwarf_csect
->next
= 0;
2319 /* set relocatable address at start of line program */
2320 saa_write8(plinep
,DW_LNS_extended_op
);
2321 saa_write8(plinep
,9); /* operand length */
2322 saa_write8(plinep
,DW_LNE_set_address
);
2323 saa_write64(plinep
,0); /* Start Address */
2324 /* if first entry */
2327 dwarf_fsect
= dwarf_esect
= dwarf_csect
;
2328 dwarf_csect
->last
= 0;
2330 /* chain to previous entry */
2333 dwarf_esect
->next
= dwarf_csect
;
2334 dwarf_esect
= dwarf_csect
;