1 #include "obj-coff-seh.h"
3 /* Forward declarations. */
4 static seh_kind seh_get_target_kind (void);
5 static int seh_symbol (bfd *, const char *, const char *, const char *, asection *, int, int);
6 static void seh_reloc (bfd *, bfd_size_type, int, int);
7 static void save_relocs (asection *sec);
8 static asection *quick_section (bfd *abfd, const char *name, int flags, int align);
9 static void seh_symbol_init (bfd *abfd, unsigned int added);
10 static void seh_emit_rva (const char *);
11 static void seh_emit_long (const char *);
12 static void seh_make_globl (char *);
13 static segT seh_make_section (void);
14 static segT seh_make_section2 (const char *section_name, unsigned flags);
15 static char *seh_make_xlbl_name (seh_context *);
16 static char *make_seh_text_label (seh_context *c, symbolS **addr);
18 static void seh_write_text_eh_data (const char *hnd, const char *hnd_data);
19 static void seh_emit_rva (const char *name);
20 static int seh_needed_unwind_info (seh_context *);
21 static void seh_fill_pcsyms (const seh_context *c, char **, int *);
22 static size_t seh_getelm_data_size (const seh_context *, int, int);
23 static size_t seh_getsize_of_unwind_entry (seh_context *, int, int, int);
24 static void seh_make_unwind_entry (const seh_context *, char *, int, int, int, unsigned char *, size_t *, int);
25 static size_t seh_getsize_unwind_data (seh_context *);
26 static void seh_create_unwind_data (seh_context *, unsigned char *, size_t);
27 static void seh_make_function_entry_xdata (seh_context *, char *, char *, char *, unsigned char *, size_t *,int);
28 static seh_scope_elem *seh_x64_makescope_elem (seh_context *, const char *, const char *, const char *, const char *);
31 static asymbol **symtab;
33 static arelent *reltab = 0;
34 static int relcount = 0, relsize = 0;
36 static seh_context *seh_ctx_root = NULL;
37 static seh_context *seh_ctx = NULL;
38 static seh_context *seh_ctx_cur = NULL;
40 /* Write xdata for arm, sh3, sh4, and ppc. */
42 seh_write_text_eh_data (const char *hnd, const char *hnd_data)
50 if (!hnd_data || hnd_data[0] == '@')
53 seh_emit_long (hnd_data);
56 /* Generate initial pdata for x64 and mips. */
58 make_function_entry_pdata (seh_context *c)
61 segT current_seg = now_seg;
62 subsegT current_subseg = now_subseg;
64 sec = seh_make_section ();
65 switch (seh_get_target_kind ())
69 seh_emit_rva (c->func_name);
70 seh_emit_rva (c->end_symbol);
71 seh_emit_rva (c->xdata_first);
75 seh_emit_long (c->func_name);
76 seh_emit_long (c->end_symbol);
77 if (c->handler_name == NULL)
79 else if (c->handler_name[0] == '@')
81 if (strcasecmp (c->handler_name, "@1") == 0)
87 seh_emit_long (c->handler_name);
88 if (c->handler_data_name == NULL || c->handler_data_name[0] == '@')
91 seh_emit_long (c->handler_data_name);
92 seh_emit_long (c->endprologue_symbol ? c->endprologue_symbol : c->func_name);
97 subseg_set (current_seg, current_subseg);
101 seh_x64_write_xdata (void)
104 size_t xdata_size = 0, count_syms = 0;
105 size_t xdata_offs = 0;
108 bfd *abfd = stdoutput;
115 h->xdata_offset = xdata_size;
116 xdata_size += seh_getsize_unwind_data (h);
117 count_syms += h->count_syms;
124 seh_symbol_init (abfd, count_syms);
125 data = xmalloc (xdata_size);
126 seg_xdata = quick_section (abfd, ".xdata", SEC_HAS_CONTENTS, 3);
127 seg_xdata->contents = data;
128 memset (data, 0, xdata_size);
129 bfd_set_section_size (abfd, seg_xdata, xdata_size);
133 xdata_offs = h->xdata_offset;
134 h->section = seg_xdata;
139 seh_create_unwind_data (h, data, xdata_offs);
144 save_relocs (seg_xdata);
145 bfd_set_symtab (abfd, symtab, symptr);
146 bfd_set_section_contents (abfd, seg_xdata, data, 0, xdata_size);
150 seh_arm_create_pdata (seh_context *c, unsigned char *data, size_t pdata_offs)
155 valueT prolog_len = 0;
156 valueT start_len = 0;
157 func_len = resolve_symbol_value (c->end_addr);
158 start_len = resolve_symbol_value (c->start_addr);
159 if (c->endprologue_addr)
160 prolog_len = resolve_symbol_value (c->endprologue_addr);
162 prolog_len = start_len;
163 func_len -= start_len;
164 prolog_len -= start_len;
168 idx = seh_symbol (c->abfd, c->start_symbol, "", "", UNDSEC, BSF_GLOBAL, 0);
169 seh_reloc (c->abfd, pdata_offs, BFD_RELOC_32, idx);
170 val = (unsigned int) func_len;
172 val |= ((unsigned int) prolog_len & 0xffU);
173 if (c->use_instruction_32)
175 if (c->handler_written)
177 bfd_put_32 (c->abfd, (bfd_vma) val, data + pdata_offs + 4);
181 seh_arm_write_pdata (void)
184 size_t pdata_size = 0, count_syms = 0;
185 size_t pdata_offs = 0;
188 bfd *abfd = stdoutput;
195 h->xdata_offset = pdata_size;
204 seh_symbol_init (abfd, count_syms);
205 data = xmalloc (pdata_size);
206 seg_pdata = quick_section (abfd, ".pdata", SEC_HAS_CONTENTS, 3);
207 seg_pdata->contents = data;
208 memset (data, 0, pdata_size);
209 bfd_set_section_size (abfd, seg_pdata, pdata_size);
213 pdata_offs = h->xdata_offset;
214 h->section = seg_pdata;
218 seh_arm_create_pdata (h, data, pdata_offs);
223 save_relocs (seg_pdata);
224 bfd_set_symtab (abfd, symtab, symptr);
225 bfd_set_section_contents (abfd, seg_pdata, data, 0, pdata_size);
229 obj_coff_seh_do_final (void)
231 switch (seh_get_target_kind ())
237 seh_arm_write_pdata ();
240 seh_x64_write_xdata ();
246 seh_x64_make_prologue_element (int kind, int reg, bfd_vma off)
248 seh_prologue_element *n;
249 if (seh_ctx_cur == NULL)
251 if (seh_ctx_cur->elems_count == seh_ctx_cur->elems_max)
253 seh_ctx_cur->elems = (seh_prologue_element *)
254 xrealloc (seh_ctx_cur->elems,
255 ((seh_ctx_cur->elems_max + 8) * sizeof (seh_prologue_element)));
256 seh_ctx_cur->elems_max += 8;
258 n = &seh_ctx_cur->elems[seh_ctx_cur->elems_count];
259 memset (n, 0, sizeof (seh_prologue_element));
263 n->pc_symbol = make_seh_text_label (seh_ctx_cur, &(n->pc_addr));
264 seh_ctx_cur->elems_count += 1;
268 seh_x64_read_reg (const char *tok, int kind, int *regno)
270 static const char *frame_regs[16] =
271 { "cfa", "rcx", "rdx", "rbx", "rsp", "rbp","rsi","rdi",
272 "r8","r9","r10","r11","r12","r13","r14","r15" };
273 static const char *int_regs[16] =
274 { "rax", "rcx", "rdx", "rbx", "rsp", "rbp","rsi","rdi",
275 "r8","r9","r10","r11","r12","r13","r14","r15" };
276 static const char *xmm_regs[16] =
277 { "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7",
278 "xmm8", "xmm9", "xmm10","xmm11","xmm12","xmm13","xmm14","xmm15" };
279 static const char *mm_regs[16] =
280 { "xmm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7",
281 "xmm8", "mm9", "mm10","mm11","mm12","mm13","mm14","mm15" };
282 const char **p = NULL;
284 char *symbol_name = NULL;
287 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
288 input_line_pointer++;
289 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
290 input_line_pointer++;
308 if (*input_line_pointer == 0 || *input_line_pointer == '\n')
312 if (*input_line_pointer == '%')
313 ++input_line_pointer;
314 symbol_name = input_line_pointer;
315 name_end = get_symbol_end ();
316 for (i = 0; i < 16; i++)
318 if (! strcasecmp (p[i], symbol_name))
323 as_warn (_("In %s we found the invalid register name %s.\n"),
326 *input_line_pointer = name_end;
327 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
328 input_line_pointer++;
329 if (*input_line_pointer == ',')
330 ++input_line_pointer;
331 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
332 input_line_pointer++;
338 seh_read_offset (const char *tok, bfd_vma *off)
340 bfd_vma r, v = 0, base = 10;
343 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
344 input_line_pointer++;
345 if (*input_line_pointer == '0')
347 ++input_line_pointer;
350 switch ((*input_line_pointer))
355 ++input_line_pointer;
360 input_line_pointer++;
365 input_line_pointer++;
369 while (*input_line_pointer != 0)
371 if (input_line_pointer[0] >= '0' && input_line_pointer[0] <='9')
372 r = (bfd_vma) (input_line_pointer[0] - '0');
373 else if (base == 16 && input_line_pointer[0] >= 'a' && input_line_pointer[0] <='f')
374 r = (bfd_vma) ((input_line_pointer[0] - 'a') + 10);
375 else if (base == 16 && input_line_pointer[0] >= 'A' && input_line_pointer[0] <='F')
376 r = (bfd_vma) ((input_line_pointer[0] - 'A') + 10);
379 input_line_pointer++;
387 as_warn (_("In %s we expect a number.\n"),
390 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
391 input_line_pointer++;
392 if (*input_line_pointer == ',')
393 ++input_line_pointer;
394 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
395 input_line_pointer++;
400 obj_coff_seh_32 (int what)
402 if (seh_ctx_cur == NULL)
404 as_fatal (_(".seh_eh requires to be in .seh_proc/.seh_endproc block.\n"));
405 demand_empty_rest_of_line ();
408 seh_ctx_cur->use_instruction_32 = (what ? 1 : 0);
409 if (seh_get_target_kind () == seh_kind_arm)
410 as_warn (_(".seh_%s32 is ignored for this target."), (what ? "" : "no"));
411 demand_empty_rest_of_line ();
415 obj_coff_seh_eh (int what ATTRIBUTE_UNUSED)
417 if (seh_ctx_cur == NULL)
419 as_fatal (_(".seh_eh requires to be in .seh_proc/.seh_endproc block.\n"));
420 demand_empty_rest_of_line ();
423 if (seh_get_target_kind () == seh_kind_arm)
425 seh_ctx_cur->handler_written = 1;
426 /* write block to .text if exception handler is set. */
427 seh_write_text_eh_data (seh_ctx_cur->handler_name, seh_ctx_cur->handler_data_name);
429 demand_empty_rest_of_line ();
433 obj_coff_seh_handler (int what ATTRIBUTE_UNUSED)
438 if (seh_ctx_cur == NULL)
440 as_fatal (_(".seh_handler requires to be in .seh_proc/.seh_endproc block.\n"));
441 demand_empty_rest_of_line ();
444 if (*input_line_pointer == 0 || *input_line_pointer == '\n')
446 as_fatal (_(".seh_handler requires a handler lable name.\n"));
447 demand_empty_rest_of_line ();
451 while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
452 input_line_pointer++;
453 symbol_name = input_line_pointer;
454 name_end = get_symbol_end ();
455 seh_ctx->handler_name = xstrdup (symbol_name);
456 if (symbol_name[0] == '@')
458 if (strcasecmp (symbol_name, "@0") != 0 && strcasecmp (symbol_name, "@1") != 0
459 && strcasecmp (symbol_name, "@null") != 0)
460 as_warn (_("Unknown constant value ,%s' for handler."), symbol_name);
462 *input_line_pointer = name_end;
463 seh_ctx->handler_data_name = NULL;
464 while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
465 input_line_pointer++;
466 symbol_name = input_line_pointer;
467 if (*input_line_pointer != '\n' && *input_line_pointer != 0)
469 name_end = get_symbol_end ();
470 seh_ctx->handler_data_name = xstrdup (symbol_name);
471 if (symbol_name[0] == '@')
473 if (seh_get_target_kind () != seh_kind_x64)
474 as_fatal (_("For this target .seh_handler doesn't support constant user-data."));
475 else if (strcasecmp (symbol_name, "@unwind") != 0 &&
476 strcasecmp (symbol_name, "@except") != 0)
477 as_warn (_("For .seh_handler the constant ,%s' is ignored."), symbol_name);
479 *input_line_pointer = name_end;
481 if (seh_ctx_cur->handler_written)
482 as_warn (_(".seh_handler is ignored as .seh_eh was seen before."));
483 demand_empty_rest_of_line ();
487 obj_coff_seh_scope (int what ATTRIBUTE_UNUSED)
489 char *symbol_name,*beg = NULL,*end = NULL, *handl = NULL, *jmp = NULL;
492 if (seh_ctx_cur == NULL)
494 as_fatal (_(".seh_scope requires to be in .seh_proc/.seh_endproc block.\n"));
495 demand_empty_rest_of_line ();
499 while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
500 input_line_pointer++;
501 if (*input_line_pointer == 0 || *input_line_pointer == '\n')
503 as_fatal (_(".seh_scope requires four symbol names.\n"));
504 demand_empty_rest_of_line ();
507 symbol_name = input_line_pointer;
508 name_end = get_symbol_end ();
509 beg = xstrdup (symbol_name);
510 *input_line_pointer = name_end;
511 while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
512 input_line_pointer++;
513 if (*input_line_pointer == 0 || *input_line_pointer == '\n')
515 as_fatal (_(".seh_scope requires three more symbol names.\n"));
516 demand_empty_rest_of_line ();
519 symbol_name = input_line_pointer;
520 name_end = get_symbol_end ();
521 end = xstrdup (symbol_name);
522 *input_line_pointer = name_end;
523 while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
524 input_line_pointer++;
525 if (*input_line_pointer == 0 || *input_line_pointer == '\n')
527 as_fatal (_(".seh_scope requires two more symbol names.\n"));
528 demand_empty_rest_of_line ();
531 symbol_name = input_line_pointer;
532 name_end = get_symbol_end ();
533 handl = xstrdup (symbol_name);
534 *input_line_pointer = name_end;
537 if (strcasecmp (handl, "@0") != 0 && strcasecmp (handl, "@1") != 0
538 && strcasecmp (handl, "@null") != 0)
539 as_warn (_("Unknown constant for handler ,%s'."), handl);
542 while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
543 input_line_pointer++;
544 if (*input_line_pointer == 0 || *input_line_pointer == '\n')
546 as_fatal (_(".seh_scope requires one more symbol names.\n"));
547 demand_empty_rest_of_line ();
550 symbol_name = input_line_pointer;
551 name_end = get_symbol_end ();
552 jmp = xstrdup (symbol_name);
553 *input_line_pointer = name_end;
556 if (strcasecmp (jmp, "@0") != 0 && strcasecmp (handl, "@null") != 0)
557 as_warn (_("Unknown constant for jump ,%s'."), jmp);
560 if (seh_get_target_kind () != seh_kind_x64)
561 as_warn (_(".seh_scope is ignored for this target."));
563 seh_x64_makescope_elem (seh_ctx_cur, beg, end, handl, jmp);
572 demand_empty_rest_of_line ();
576 obj_coff_seh_proc (int what ATTRIBUTE_UNUSED)
581 if (seh_ctx_cur != NULL)
583 as_warn (_(".seh_proc has to be closed by .seh_endprog\n"));
584 obj_coff_seh_endproc (0);
587 if (*input_line_pointer == 0 || *input_line_pointer == '\n')
589 as_fatal (_(".seh_proc requires function lable name.\n"));
590 demand_empty_rest_of_line ();
594 while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
595 input_line_pointer++;
596 symbol_name = input_line_pointer;
597 name_end = get_symbol_end ();
600 seh_ctx_root = seh_ctx = (seh_context *) xmalloc (sizeof (seh_context));
603 seh_ctx->next = (seh_context *) xmalloc (sizeof (seh_context));
604 seh_ctx = seh_ctx->next;
606 seh_ctx_cur = seh_ctx;
607 memset (seh_ctx, 0, sizeof (seh_context));
609 seh_ctx->func_name = xstrdup (symbol_name);
610 *input_line_pointer = name_end;
611 while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
612 input_line_pointer++;
613 seh_ctx->start_symbol = make_seh_text_label (seh_ctx_cur, &(seh_ctx_cur->start_addr));
614 demand_empty_rest_of_line ();
618 obj_coff_seh_endproc (int what ATTRIBUTE_UNUSED)
620 if (seh_ctx_cur == NULL)
622 as_warn (_(".seh_endprog without prior .seh_proc (ignored)\n"));
623 demand_empty_rest_of_line ();
626 seh_ctx->end_symbol = make_seh_text_label (seh_ctx, &(seh_ctx->end_addr));
627 seh_ctx->xdata_first = seh_make_xlbl_name (seh_ctx);
628 make_function_entry_pdata (seh_ctx);
630 demand_empty_rest_of_line ();
634 obj_coff_seh_push (int what)
638 if (seh_ctx_cur == NULL)
640 as_warn (_(".seh_push used outside of .seh_proc block.\n"));
641 demand_empty_rest_of_line ();
644 /* what 0:reg, 1:pushframe. */
648 if (seh_x64_read_reg (".seh_push", 1, ®))
649 kind = UWOP_PUSH_NONVOL;
651 as_warn (_(".seh_pushreg expects register argument."));
654 kind = UWOP_PUSH_MACHFRAME;
659 if (seh_get_target_kind () != seh_kind_x64)
660 as_warn (_(".seh_save... is ignored for this target.\n"));
662 seh_x64_make_prologue_element (kind, reg, 0);
663 demand_empty_rest_of_line ();
667 obj_coff_seh_save (int what)
674 /* what 0:reg, 1:mm, 2:xmm. */
678 ok &= seh_x64_read_reg (".seh_savereg", 1, ®);
679 kind = UWOP_SAVE_NONVOL;
682 ok &= seh_x64_read_reg (".seh_savemm", 2, ®);
683 kind = UWOP_SAVE_XMM;
686 ok &= seh_x64_read_reg (".seh_savexmm", 3, ®);
687 kind = UWOP_SAVE_XMM128;
692 ok &= seh_read_offset (".seh_save", &off);
693 if (seh_ctx_cur == NULL)
695 as_warn (_(".seh_save used outside of .seh_proc block.\n"));
696 demand_empty_rest_of_line ();
699 if (seh_get_target_kind () != seh_kind_x64)
700 as_warn (_(".seh_save... is ignored for this target.\n"));
702 seh_x64_make_prologue_element (kind, reg, off);
703 demand_empty_rest_of_line ();
707 obj_coff_seh_endprologue (int what ATTRIBUTE_UNUSED)
709 if (seh_ctx_cur == NULL)
711 as_warn (_(".seh_endprologue used outside of .seh_proc block.\n"));
712 demand_empty_rest_of_line ();
715 if (seh_ctx_cur->endprologue_symbol != NULL)
716 as_warn (_(".seh_endprologue used more then once in .seh_proc block.\n"));
718 seh_ctx_cur->endprologue_symbol = make_seh_text_label (seh_ctx_cur, &seh_ctx_cur->endprologue_addr);
722 obj_coff_seh_stack_alloc (int what ATTRIBUTE_UNUSED)
725 if (seh_ctx_cur == NULL)
727 as_warn (_(".seh_stackalloc used outside of .seh_proc block.\n"));
728 demand_empty_rest_of_line ();
731 if (seh_read_offset (".seh_stackalloc", &size))
733 if (seh_get_target_kind () != seh_kind_x64)
734 as_warn (_(".seh_stackalloc is ignored for this target.\n"));
736 seh_x64_make_prologue_element (UWOP_ALLOC_LARGE, 0, size);
741 obj_coff_seh_setframe (int what ATTRIBUTE_UNUSED)
747 ok &= seh_x64_read_reg (".seh_setframe", 0, ®);
748 ok &= seh_read_offset (".seh_setframe", &off);
749 if (seh_ctx_cur == NULL)
751 as_warn (_(".seh_setframe used outside of .seh_proc block.\n"));
752 demand_empty_rest_of_line ();
757 seh_ctx_cur->framereg = reg;
758 seh_ctx_cur->frameoff = off;
760 if (seh_get_target_kind () != seh_kind_x64)
761 as_warn (_(".seh_setframe is ignored for this target.\n"));
762 demand_empty_rest_of_line ();
765 /* Misc function helpers. */
767 seh_reloc (bfd *abfd, bfd_size_type address, int which_howto, int symidx)
769 if (relcount >= relsize - 1)
773 reltab = xrealloc (reltab, relsize * sizeof (arelent));
775 reltab = xmalloc (relsize * sizeof (arelent));
777 reltab[relcount].address = address;
778 reltab[relcount].addend = 0;
779 reltab[relcount].howto = bfd_reloc_type_lookup (abfd, which_howto);
780 reltab[relcount].sym_ptr_ptr = symtab + symidx;
785 save_relocs (asection *sec)
789 sec->relocation = reltab;
790 sec->reloc_count = relcount;
791 sec->orelocation = xmalloc ((relcount + 1) * sizeof (arelent *));
792 for (i = 0; i < relcount; i++)
793 sec->orelocation[i] = sec->relocation + i;
794 sec->orelocation[relcount] = 0;
795 sec->flags |= SEC_RELOC;
797 relcount = relsize = 0;
801 seh_symbol_init (bfd *abfd, unsigned int added)
803 unsigned int oldcount;
804 oldcount = bfd_get_symcount (abfd);
806 symtab = xmalloc ((oldcount + added + 6) * sizeof (asymbol *));
808 memcpy (symtab, bfd_get_outsymbols (abfd), sizeof (asymbol *) * oldcount);
812 seh_symbol (bfd *abfd, const char *n1, const char *n2, const char *n3,
813 asection *sec, int flags, int addr)
816 char *name = xmalloc (strlen (n1) + strlen (n2) + strlen (n3) + 1);
821 sym = bfd_make_empty_symbol (abfd);
826 symtab[symptr++] = sym;
831 quick_section (bfd *abfd, const char *name, int flags, int align)
835 sec = seh_make_section2 (name, flags);
836 bfd_set_section_alignment (abfd, sec, align);
837 /* Remember to undo this before trying to link internally! */
839 sym = bfd_make_empty_symbol (abfd);
840 symtab[symptr++] = sym;
841 sym->name = sec->name;
843 sym->flags = BSF_LOCAL;
850 seh_get_target_kind (void)
853 return seh_kind_unknown;
854 switch (bfd_get_arch (stdoutput))
857 case bfd_arch_powerpc:
861 switch (bfd_get_mach (stdoutput))
863 case bfd_mach_x86_64:
864 case bfd_mach_x86_64_intel_syntax:
871 return seh_kind_mips;
873 /* Should return seh_kind_x64. But not implemented yet. */
874 return seh_kind_unknown;
878 return seh_kind_unknown;
882 seh_emit_rva (const char *name)
884 char *p = (char *) xmalloc (strlen (name) + 1);
885 char *s = input_line_pointer;
888 input_line_pointer = p;
890 input_line_pointer = s;
894 seh_emit_long (const char *name)
896 char *p = (char *) xmalloc (strlen (name) + 1);
897 char *s = input_line_pointer;
900 input_line_pointer = p;
902 input_line_pointer = s;
906 seh_make_globl (char *sym_name)
908 char *s = input_line_pointer;
910 input_line_pointer = sym_name;
912 input_line_pointer = s;
916 seh_make_section2 (const char *section_name, unsigned flags)
921 name = xmalloc (strlen (section_name) + 1);
922 strcpy (name, section_name);
924 sec = subseg_new (name, (subsegT) 0);
925 bfd_set_section_flags (stdoutput, sec,
926 ((SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA | flags)
927 & bfd_applicable_section_flags (stdoutput)));
933 seh_make_section (void)
935 static segT seg_pdata = NULL;
939 seg_pdata = seh_make_section2 (".pdata", 0);
945 seh_make_xlbl_name (seh_context *c)
947 size_t len = strlen (".seh_xlbl_") + strlen (c->func_name) + 9 + 1;
948 char *ret = (char*) xmalloc (len);
950 as_fatal (_("Out of memory for xdata lable for %s"), c->func_name);
952 sprintf (ret, ".seh_xlbl_%s_%x", c->func_name, + c->xlbl_count);
958 make_seh_text_label (seh_context *c, symbolS **addr)
961 size_t len = strlen (".seh_tlbl_") + strlen (c->func_name) + 9 + 1;
962 sym_name = (char *) xmalloc (len);
964 as_fatal (_("Allocating memory for SEH's text symbol for %s failed"), c->func_name);
965 sprintf (sym_name, ".seh_tlbl_%s_%x", c->func_name, c->tlbl_count);
969 seh_make_globl (sym_name);
970 *addr = colon (sym_name);
975 /* x64 secific functions. */
978 seh_fill_pcsyms (const seh_context *c, char **names, int *idx)
982 valueT start_off = resolve_symbol_value (c->start_addr);
984 seh_prologue_element *e = c->elems;
985 names[0] = c->start_symbol;
987 if (c->elems_count == 0)
989 for (i = 0; i < c->elems_count; i++)
991 un_off = resolve_symbol_value (e[i].pc_addr);
992 if ((un_off - start_off) > 255)
994 names[count] = e[i].pc_symbol;
995 idx[count] = (int) i;
1003 seh_needed_unwind_info (seh_context *c)
1007 valueT start_off = resolve_symbol_value (c->start_addr);
1009 seh_prologue_element *e = c->elems;
1010 if (c->elems_count == 0)
1012 for (i = 0; i < c->elems_count; i++)
1014 un_off = resolve_symbol_value (e[i].pc_addr);
1015 if ((un_off - start_off) > 255)
1025 seh_getelm_data_size (const seh_context *c, int elm_start, int elm_end)
1027 size_t ret = PEX64_UWI_SIZEOF_UWCODE_ARRAY (elm_end - elm_start);
1028 while (elm_start < elm_end)
1030 switch (c->elems[elm_start].kind)
1032 case UWOP_PUSH_NONVOL:
1033 case UWOP_PUSH_MACHFRAME:
1036 case UWOP_SAVE_NONVOL:
1038 case UWOP_SAVE_XMM128:
1039 if ((c->elems[elm_start].offset & 7) != 0 ||
1040 ((c->elems[elm_start].offset / 8) > 0xffff))
1045 case UWOP_ALLOC_LARGE:
1057 seh_getsize_of_unwind_entry (seh_context *c, int elm_start, int elm_end, int bechain)
1059 size_t ret = seh_getelm_data_size(c, elm_start, elm_end);
1065 c->count_reloc += 1;
1070 if (c->handler_name != NULL)
1072 if (c->handler_data_name != NULL
1073 && c->handler_data_name[0] != '@')
1077 c->count_reloc += 2;
1081 ret += 8 + (c->scope_count * 4) * 4;
1082 c->count_syms += (c->scope_count * 4) + 1;
1083 c->count_reloc += (c->scope_count * 4) + 1;
1091 seh_make_unwind_entry (const seh_context *c, char *name, int elm_start, int elm_end, int bechain,
1092 unsigned char *data, size_t *poffs, int no)
1094 size_t off = *poffs;
1096 valueT start_off = resolve_symbol_value (c->start_addr);
1097 valueT end_prologue;
1098 size_t uwcodes = seh_getelm_data_size(c, elm_start, elm_end);
1099 unsigned int flag = UNW_FLAG_NHANDLER;
1102 if (c->handler_name != NULL)
1104 flag = UNW_FLAG_EHANDLER;
1105 if (c->handler_data_name != NULL && c->handler_data_name[0] != '@')
1106 flag = UNW_FLAG_FHANDLER;
1107 else if (c->handler_data_name != NULL &&
1108 strcasecmp (c->handler_data_name, "@unwind") == 0)
1109 flag = UNW_FLAG_UHANDLER;
1111 if (!c->endprologue_addr)
1112 end_prologue = start_off;
1114 end_prologue = resolve_symbol_value (c->endprologue_addr);
1115 seh_symbol (c->abfd, name, "", "", c->section, BSF_GLOBAL, (int) off);
1116 data[off++] = (1 | ((bechain ? UNW_FLAG_CHAININFO : flag) << 3));
1118 start_off = (valueT) c->elems[elm_start].offset;
1119 end_prologue -= start_off;
1120 if (end_prologue > 255)
1122 data[off++] = (unsigned char) end_prologue;
1123 data[off++] = (unsigned char) (uwcodes / 2);
1124 data[off] = (unsigned char) c->framereg;
1125 data[off++] |= (unsigned char) ((c->frameoff / 16) << 4);
1130 sprintf (n,"%x", no);
1131 idx = seh_symbol (c->abfd, ".xdata_fct", c->func_name, n, UNDSEC, BSF_GLOBAL, (int) off);
1132 seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
1135 else if (c->handler_name != NULL)
1137 if (flag == UNW_FLAG_FHANDLER)
1139 if (strcasecmp (c->handler_name, "@1") == 0)
1140 bfd_put_32 (c->abfd, (bfd_vma) 1, &data[off]);
1141 else if (c->handler_name[0] != '@')
1143 idx = seh_symbol (c->abfd, c->handler_name, "", "", UNDSEC, BSF_GLOBAL, 0);
1144 seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
1147 idx = seh_symbol (c->abfd, c->handler_data_name, "", "", UNDSEC, BSF_GLOBAL, 0);
1148 seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
1151 else if (flag == UNW_FLAG_UHANDLER || flag == UNW_FLAG_EHANDLER)
1153 if (strcasecmp (c->handler_name, "@1") == 0)
1154 bfd_put_32 (c->abfd, (bfd_vma) 1, &data[off]);
1155 else if (c->handler_name[0] != '@')
1157 idx = seh_symbol (c->abfd, c->handler_name, "", "", UNDSEC, BSF_GLOBAL, 0);
1158 seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
1161 bfd_put_32 (c->abfd, (bfd_vma) c->scope_count, &data[off]);
1163 for (it = 0; it < c->scope_count; it++)
1165 idx = seh_symbol (c->abfd, c->scopes[it].begin_addr, "", "", UNDSEC, BSF_GLOBAL, 0);
1166 seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
1168 idx = seh_symbol (c->abfd, c->scopes[it].end_addr, "", "", UNDSEC, BSF_GLOBAL, 0);
1169 seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
1171 if (c->scopes[it].handler_addr[0] == '@')
1173 if (strcasecmp (c->scopes[it].handler_addr, "@1") == 0)
1174 bfd_put_32 (c->abfd, (bfd_vma) 1, &data[off]);
1178 idx = seh_symbol (c->abfd, c->scopes[it].handler_addr, "", "", UNDSEC, BSF_GLOBAL, 0);
1179 seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
1182 if (c->scopes[it].jump_addr[0] == '@')
1184 if (strcasecmp (c->scopes[it].jump_addr, "@1") == 0)
1185 bfd_put_32 (c->abfd, (bfd_vma) 1, &data[off]);
1189 idx = seh_symbol (c->abfd, c->scopes[it].jump_addr, "", "", UNDSEC, BSF_GLOBAL, 0);
1190 seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
1200 seh_getsize_unwind_data (seh_context *c)
1202 int need = seh_needed_unwind_info (c);
1204 char **names = (char **) xmalloc (sizeof (char *) * need);
1205 char **pc_syms = (char **) xmalloc (sizeof (char *) * need);
1206 int *elm_start = (int *) xmalloc (sizeof (int) * (need + 1));
1207 size_t xdata_sz = 0;
1209 seh_fill_pcsyms (c, pc_syms, elm_start);
1210 elm_start[need] = c->elems_count;
1212 xdata_sz += ((12 * (size_t) need));
1213 c->count_syms += 5 * need;
1214 xdata_sz += (seh_getsize_of_unwind_entry (c, elm_start[0], elm_start[1], 1 != need) + 7) & ~7;
1215 for (i = 1; i < need; i++)
1217 xdata_sz += (seh_getsize_of_unwind_entry (c, elm_start[i], elm_start[i + 1], 1 != need) + 7) & ~7;
1220 /* Create lable names for .xdata unwind info. */
1221 names[0] = c->xdata_first;
1222 for (i = 1; i < need; i++)
1223 names[i] = seh_make_xlbl_name (c);
1224 c->xdata_names = names;
1225 c->xdata_pcsyms = pc_syms;
1226 c->xdata_elm_start = elm_start;
1227 c->xdata_sz = xdata_sz;
1232 seh_create_unwind_data (seh_context *c, unsigned char *data, size_t offs)
1234 int need = seh_needed_unwind_info (c);
1236 char **names = c->xdata_names;
1237 char **pc_syms = c->xdata_pcsyms;
1238 int *elm_start = c->xdata_elm_start;
1240 for (i = 1; i < need; i++)
1242 seh_make_function_entry_xdata (c, pc_syms[i], c->end_symbol, names[i], data, &offs, i);
1244 /* Generate the function entry. Remark, that just
1245 first is in .pdata section and already emitted. */
1246 seh_make_unwind_entry (c, c->xdata_first, elm_start[0], elm_start[1], 1 != need, data, &offs, 1);
1247 for (i = 1; i < need; i++)
1249 seh_make_unwind_entry (c, names[i], elm_start[i], elm_start[i + 1], (i + 1) != need, data, &offs, i + 1);
1251 for (i = 1; i < need; i++)
1256 c->xdata_names = NULL;
1257 c->xdata_pcsyms = NULL;
1258 c->xdata_elm_start = NULL;
1262 seh_make_function_entry_xdata (seh_context *c, char *pc_start, char *pc_end, char *pc_xdata, unsigned char *data, size_t *poffs,int no)
1264 bfd_vma addr = (bfd_vma) *poffs;
1269 sprintf (s,"%x",no);
1270 seh_symbol (c->abfd, ".xdata_fct",c->func_name, s, c->section, BSF_GLOBAL, (int) poffs[0]);
1271 idx = seh_symbol (c->abfd, pc_start,"","", UNDSEC, BSF_GLOBAL,0);
1272 seh_reloc (c->abfd, addr, BFD_RELOC_RVA, idx);
1273 idx = seh_symbol (c->abfd, pc_end,"","", UNDSEC, BSF_GLOBAL,0);
1274 seh_reloc (c->abfd, addr + 4, BFD_RELOC_RVA, idx);
1275 idx = seh_symbol (c->abfd, pc_xdata,"","", UNDSEC, BSF_GLOBAL,0);
1276 seh_reloc (c->abfd, addr + 8, BFD_RELOC_RVA, idx);
1280 static seh_scope_elem *
1281 seh_x64_makescope_elem (seh_context *c, const char *begin, const char *end,
1282 const char *handler, const char *jmp)
1287 if (c->scope_count >= c->scope_max)
1289 seh_scope_elem *h = (seh_scope_elem *) xmalloc (sizeof (seh_scope_elem) * (c->scope_max + 8));
1290 memset (h, 0, sizeof (seh_scope_elem) * (c->scope_max + 8));
1291 if (c->scopes != NULL)
1292 memcpy (h, c->scopes, sizeof (seh_scope_elem) * c->scope_max);
1293 if (c->scopes != NULL)
1298 r = &c->scopes[c->scope_count++];
1299 r->begin_addr = xstrdup (begin);
1300 r->end_addr = xstrdup (end);
1301 r->handler_addr = (!handler ? NULL : xstrdup (handler));
1302 r->jump_addr = (!jmp ? NULL : xstrdup (jmp));