1 /* dw2gencfi.c - Support for generating Dwarf2 CFI information.
2 Copyright (C) 2003-2014 Free Software Foundation, Inc.
3 Contributed by Michal Ludvig <mludvig@suse.cz>
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
23 #include "dw2gencfi.h"
25 #include "dwarf2dbg.h"
27 #ifdef TARGET_USE_CFIPOP
29 /* By default, use difference expressions if DIFF_EXPR_OK is defined. */
30 #ifndef CFI_DIFF_EXPR_OK
32 # define CFI_DIFF_EXPR_OK 1
34 # define CFI_DIFF_EXPR_OK 0
38 #ifndef CFI_DIFF_LSDA_OK
39 #define CFI_DIFF_LSDA_OK CFI_DIFF_EXPR_OK
42 #if CFI_DIFF_EXPR_OK == 1 && CFI_DIFF_LSDA_OK == 0
43 # error "CFI_DIFF_EXPR_OK should imply CFI_DIFF_LSDA_OK"
46 /* We re-use DWARF2_LINE_MIN_INSN_LENGTH for the code alignment field
47 of the CIE. Default to 1 if not otherwise specified. */
48 #ifndef DWARF2_LINE_MIN_INSN_LENGTH
49 #define DWARF2_LINE_MIN_INSN_LENGTH 1
52 /* By default, use 32-bit relocations from .eh_frame into .text. */
53 #ifndef DWARF2_FDE_RELOC_SIZE
54 #define DWARF2_FDE_RELOC_SIZE 4
57 /* By default, use a read-only .eh_frame section. */
58 #ifndef DWARF2_EH_FRAME_READ_ONLY
59 #define DWARF2_EH_FRAME_READ_ONLY SEC_READONLY
62 #ifndef EH_FRAME_ALIGNMENT
63 #define EH_FRAME_ALIGNMENT (bfd_get_arch_size (stdoutput) == 64 ? 3 : 2)
66 #ifndef tc_cfi_frame_initial_instructions
67 #define tc_cfi_frame_initial_instructions() ((void)0)
70 #ifndef tc_cfi_startproc
71 # define tc_cfi_startproc() ((void)0)
74 #ifndef tc_cfi_endproc
75 # define tc_cfi_endproc(fde) ((void) (fde))
79 #define DWARF2_FORMAT(SEC) dwarf2_format_32bit
82 #ifndef DWARF2_ADDR_SIZE
83 #define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8)
86 #if SUPPORT_FRAME_LINKONCE
87 #define CUR_SEG(structp) structp->cur_seg
88 #define SET_CUR_SEG(structp, seg) structp->cur_seg = seg
89 #define HANDLED(structp) structp->handled
90 #define SET_HANDLED(structp, val) structp->handled = val
92 #define CUR_SEG(structp) NULL
93 #define SET_CUR_SEG(structp, seg) (void) (0 && seg)
94 #define HANDLED(structp) 0
95 #define SET_HANDLED(structp, val) (void) (0 && val)
98 /* Private segment collection list. */
106 #define FRAME_NAME ".eh_frame"
108 static struct hash_control *dwcfi_hash;
110 /* Build based on segment the derived .debug_...
111 segment name containing origin segment's postfix name part. */
114 get_debugseg_name (segT seg, const char *base_name)
125 name = bfd_get_section_name (stdoutput, seg);
127 dollar = strchr (name, '$');
128 dot = strchr (name + 1, '.');
136 else if (dot < dollar)
142 return concat (base_name, name, NULL);
145 /* Allocate a dwcfi_seg_list structure. */
147 static struct dwcfi_seg_list *
148 alloc_debugseg_item (segT seg, int subseg, char *name)
150 struct dwcfi_seg_list *r;
152 r = (struct dwcfi_seg_list *)
153 xmalloc (sizeof (struct dwcfi_seg_list) + strlen (name));
161 is_now_linkonce_segment (void)
163 if ((bfd_get_section_flags (stdoutput, now_seg)
164 & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD
165 | SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE
166 | SEC_LINK_DUPLICATES_SAME_CONTENTS)) != 0)
171 /* Generate debug... segment with same linkonce properties
175 make_debug_seg (segT cseg, char *name, int sflags)
177 segT save_seg = now_seg;
178 int save_subseg = now_subseg;
182 r = subseg_new (name, 0);
184 /* Check if code segment is marked as linked once. */
188 flags = bfd_get_section_flags (stdoutput, cseg)
189 & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD
190 | SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE
191 | SEC_LINK_DUPLICATES_SAME_CONTENTS);
193 /* Add standard section flags. */
196 /* Apply possibly linked once flags to new generated segment, too. */
197 if (!bfd_set_section_flags (stdoutput, r, flags))
198 as_bad (_("bfd_set_section_flags: %s"),
199 bfd_errmsg (bfd_get_error ()));
201 /* Restore to previous segment. */
202 if (save_seg != NULL)
203 subseg_set (save_seg, save_subseg);
208 dwcfi_hash_insert (const char *name, struct dwcfi_seg_list *item)
210 const char *error_string;
212 if ((error_string = hash_jam (dwcfi_hash, name, (char *) item)))
213 as_fatal (_("Inserting \"%s\" into structure table failed: %s"),
217 static struct dwcfi_seg_list *
218 dwcfi_hash_find (char *name)
220 return (struct dwcfi_seg_list *) hash_find (dwcfi_hash, name);
223 static struct dwcfi_seg_list *
224 dwcfi_hash_find_or_make (segT cseg, const char *base_name, int flags)
226 struct dwcfi_seg_list *item;
229 /* Initialize dwcfi_hash once. */
231 dwcfi_hash = hash_new ();
233 name = get_debugseg_name (cseg, base_name);
235 item = dwcfi_hash_find (name);
238 item = alloc_debugseg_item (make_debug_seg (cseg, name, flags), 0, name);
240 dwcfi_hash_insert (item->seg_name, item);
248 /* ??? Share this with dwarf2cfg.c. */
249 #ifndef TC_DWARF2_EMIT_OFFSET
250 #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset
252 /* Create an offset to .dwarf2_*. */
255 generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size)
260 exp.X_add_symbol = symbol;
261 exp.X_add_number = 0;
262 emit_expr (&exp, size);
266 struct cfi_escape_data
268 struct cfi_escape_data *next;
274 struct cie_entry *next;
275 #if SUPPORT_FRAME_LINKONCE
278 symbolS *start_address;
279 unsigned int return_column;
280 unsigned int signal_frame;
281 unsigned char per_encoding;
282 unsigned char lsda_encoding;
283 expressionS personality;
284 struct cfi_insn_data *first, *last;
287 /* List of FDE entries. */
289 struct fde_entry *all_fde_data;
290 static struct fde_entry **last_fde_data = &all_fde_data;
292 /* List of CIEs so that they could be reused. */
293 static struct cie_entry *cie_root;
295 /* Stack of old CFI data, for save/restore. */
298 struct cfa_save_data *next;
302 /* Current open FDE entry. */
305 struct fde_entry *cur_fde_data;
306 symbolS *last_address;
307 offsetT cur_cfa_offset;
308 struct cfa_save_data *cfa_save_stack;
311 /* Construct a new FDE structure and add it to the end of the fde list. */
313 static struct fde_entry *
314 alloc_fde_entry (void)
316 struct fde_entry *fde = (struct fde_entry *)
317 xcalloc (1, sizeof (struct fde_entry));
319 frchain_now->frch_cfi_data = (struct frch_cfi_data *)
320 xcalloc (1, sizeof (struct frch_cfi_data));
321 frchain_now->frch_cfi_data->cur_fde_data = fde;
322 *last_fde_data = fde;
323 last_fde_data = &fde->next;
324 SET_CUR_SEG (fde, is_now_linkonce_segment ());
325 SET_HANDLED (fde, 0);
326 fde->last = &fde->data;
327 fde->return_column = DWARF2_DEFAULT_RETURN_COLUMN;
328 fde->per_encoding = DW_EH_PE_omit;
329 fde->lsda_encoding = DW_EH_PE_omit;
334 /* The following functions are available for a backend to construct its
335 own unwind information, usually from legacy unwind directives. */
337 /* Construct a new INSN structure and add it to the end of the insn list
338 for the currently active FDE. */
340 static struct cfi_insn_data *
341 alloc_cfi_insn_data (void)
343 struct cfi_insn_data *insn = (struct cfi_insn_data *)
344 xcalloc (1, sizeof (struct cfi_insn_data));
345 struct fde_entry *cur_fde_data = frchain_now->frch_cfi_data->cur_fde_data;
347 *cur_fde_data->last = insn;
348 cur_fde_data->last = &insn->next;
349 SET_CUR_SEG (insn, is_now_linkonce_segment ());
353 /* Construct a new FDE structure that begins at LABEL. */
356 cfi_new_fde (symbolS *label)
358 struct fde_entry *fde = alloc_fde_entry ();
359 fde->start_address = label;
360 frchain_now->frch_cfi_data->last_address = label;
363 /* End the currently open FDE. */
366 cfi_end_fde (symbolS *label)
368 frchain_now->frch_cfi_data->cur_fde_data->end_address = label;
369 free (frchain_now->frch_cfi_data);
370 frchain_now->frch_cfi_data = NULL;
373 /* Set the return column for the current FDE. */
376 cfi_set_return_column (unsigned regno)
378 frchain_now->frch_cfi_data->cur_fde_data->return_column = regno;
381 /* Universal functions to store new instructions. */
384 cfi_add_CFA_insn (int insn)
386 struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
388 insn_ptr->insn = insn;
392 cfi_add_CFA_insn_reg (int insn, unsigned regno)
394 struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
396 insn_ptr->insn = insn;
397 insn_ptr->u.r = regno;
401 cfi_add_CFA_insn_offset (int insn, offsetT offset)
403 struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
405 insn_ptr->insn = insn;
406 insn_ptr->u.i = offset;
410 cfi_add_CFA_insn_reg_reg (int insn, unsigned reg1, unsigned reg2)
412 struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
414 insn_ptr->insn = insn;
415 insn_ptr->u.rr.reg1 = reg1;
416 insn_ptr->u.rr.reg2 = reg2;
420 cfi_add_CFA_insn_reg_offset (int insn, unsigned regno, offsetT offset)
422 struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
424 insn_ptr->insn = insn;
425 insn_ptr->u.ri.reg = regno;
426 insn_ptr->u.ri.offset = offset;
429 /* Add a CFI insn to advance the PC from the last address to LABEL. */
432 cfi_add_advance_loc (symbolS *label)
434 struct cfi_insn_data *insn = alloc_cfi_insn_data ();
436 insn->insn = DW_CFA_advance_loc;
437 insn->u.ll.lab1 = frchain_now->frch_cfi_data->last_address;
438 insn->u.ll.lab2 = label;
440 frchain_now->frch_cfi_data->last_address = label;
443 /* Add a DW_CFA_offset record to the CFI data. */
446 cfi_add_CFA_offset (unsigned regno, offsetT offset)
448 unsigned int abs_data_align;
450 gas_assert (DWARF2_CIE_DATA_ALIGNMENT != 0);
451 cfi_add_CFA_insn_reg_offset (DW_CFA_offset, regno, offset);
453 abs_data_align = (DWARF2_CIE_DATA_ALIGNMENT < 0
454 ? -DWARF2_CIE_DATA_ALIGNMENT : DWARF2_CIE_DATA_ALIGNMENT);
455 if (offset % abs_data_align)
456 as_bad (_("register save offset not a multiple of %u"), abs_data_align);
459 /* Add a DW_CFA_def_cfa record to the CFI data. */
462 cfi_add_CFA_def_cfa (unsigned regno, offsetT offset)
464 cfi_add_CFA_insn_reg_offset (DW_CFA_def_cfa, regno, offset);
465 frchain_now->frch_cfi_data->cur_cfa_offset = offset;
468 /* Add a DW_CFA_register record to the CFI data. */
471 cfi_add_CFA_register (unsigned reg1, unsigned reg2)
473 cfi_add_CFA_insn_reg_reg (DW_CFA_register, reg1, reg2);
476 /* Add a DW_CFA_def_cfa_register record to the CFI data. */
479 cfi_add_CFA_def_cfa_register (unsigned regno)
481 cfi_add_CFA_insn_reg (DW_CFA_def_cfa_register, regno);
484 /* Add a DW_CFA_def_cfa_offset record to the CFI data. */
487 cfi_add_CFA_def_cfa_offset (offsetT offset)
489 cfi_add_CFA_insn_offset (DW_CFA_def_cfa_offset, offset);
490 frchain_now->frch_cfi_data->cur_cfa_offset = offset;
494 cfi_add_CFA_restore (unsigned regno)
496 cfi_add_CFA_insn_reg (DW_CFA_restore, regno);
500 cfi_add_CFA_undefined (unsigned regno)
502 cfi_add_CFA_insn_reg (DW_CFA_undefined, regno);
506 cfi_add_CFA_same_value (unsigned regno)
508 cfi_add_CFA_insn_reg (DW_CFA_same_value, regno);
512 cfi_add_CFA_remember_state (void)
514 struct cfa_save_data *p;
516 cfi_add_CFA_insn (DW_CFA_remember_state);
518 p = (struct cfa_save_data *) xmalloc (sizeof (*p));
519 p->cfa_offset = frchain_now->frch_cfi_data->cur_cfa_offset;
520 p->next = frchain_now->frch_cfi_data->cfa_save_stack;
521 frchain_now->frch_cfi_data->cfa_save_stack = p;
525 cfi_add_CFA_restore_state (void)
527 struct cfa_save_data *p;
529 cfi_add_CFA_insn (DW_CFA_restore_state);
531 p = frchain_now->frch_cfi_data->cfa_save_stack;
534 frchain_now->frch_cfi_data->cur_cfa_offset = p->cfa_offset;
535 frchain_now->frch_cfi_data->cfa_save_stack = p->next;
539 as_bad (_("CFI state restore without previous remember"));
543 /* Parse CFI assembler directives. */
545 static void dot_cfi (int);
546 static void dot_cfi_escape (int);
547 static void dot_cfi_sections (int);
548 static void dot_cfi_startproc (int);
549 static void dot_cfi_endproc (int);
550 static void dot_cfi_personality (int);
551 static void dot_cfi_lsda (int);
552 static void dot_cfi_val_encoded_addr (int);
554 const pseudo_typeS cfi_pseudo_table[] =
556 { "cfi_sections", dot_cfi_sections, 0 },
557 { "cfi_startproc", dot_cfi_startproc, 0 },
558 { "cfi_endproc", dot_cfi_endproc, 0 },
559 { "cfi_def_cfa", dot_cfi, DW_CFA_def_cfa },
560 { "cfi_def_cfa_register", dot_cfi, DW_CFA_def_cfa_register },
561 { "cfi_def_cfa_offset", dot_cfi, DW_CFA_def_cfa_offset },
562 { "cfi_adjust_cfa_offset", dot_cfi, CFI_adjust_cfa_offset },
563 { "cfi_offset", dot_cfi, DW_CFA_offset },
564 { "cfi_rel_offset", dot_cfi, CFI_rel_offset },
565 { "cfi_register", dot_cfi, DW_CFA_register },
566 { "cfi_return_column", dot_cfi, CFI_return_column },
567 { "cfi_restore", dot_cfi, DW_CFA_restore },
568 { "cfi_undefined", dot_cfi, DW_CFA_undefined },
569 { "cfi_same_value", dot_cfi, DW_CFA_same_value },
570 { "cfi_remember_state", dot_cfi, DW_CFA_remember_state },
571 { "cfi_restore_state", dot_cfi, DW_CFA_restore_state },
572 { "cfi_window_save", dot_cfi, DW_CFA_GNU_window_save },
573 { "cfi_escape", dot_cfi_escape, 0 },
574 { "cfi_signal_frame", dot_cfi, CFI_signal_frame },
575 { "cfi_personality", dot_cfi_personality, 0 },
576 { "cfi_lsda", dot_cfi_lsda, 0 },
577 { "cfi_val_encoded_addr", dot_cfi_val_encoded_addr, 0 },
582 cfi_parse_separator (void)
585 if (*input_line_pointer == ',')
586 input_line_pointer++;
588 as_bad (_("missing separator"));
591 #ifndef tc_parse_to_dw2regnum
593 tc_parse_to_dw2regnum (expressionS *exp)
595 # ifdef tc_regname_to_dw2regnum
597 if (is_name_beginner (*input_line_pointer)
598 || (*input_line_pointer == '%'
599 && is_name_beginner (*++input_line_pointer)))
603 name = input_line_pointer;
604 c = get_symbol_end ();
606 exp->X_op = O_constant;
607 exp->X_add_number = tc_regname_to_dw2regnum (name);
609 *input_line_pointer = c;
613 expression_and_evaluate (exp);
623 tc_parse_to_dw2regnum (&exp);
628 regno = exp.X_add_number;
638 as_bad (_("bad register expression"));
646 cfi_parse_const (void)
648 return get_absolute_expression ();
657 if (frchain_now->frch_cfi_data == NULL)
659 as_bad (_("CFI instruction used without previous .cfi_startproc"));
660 ignore_rest_of_line ();
664 /* If the last address was not at the current PC, advance to current. */
665 if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now
666 || S_GET_VALUE (frchain_now->frch_cfi_data->last_address)
668 cfi_add_advance_loc (symbol_temp_new_now ());
673 reg1 = cfi_parse_reg ();
674 cfi_parse_separator ();
675 offset = cfi_parse_const ();
676 cfi_add_CFA_offset (reg1, offset);
680 reg1 = cfi_parse_reg ();
681 cfi_parse_separator ();
682 offset = cfi_parse_const ();
683 cfi_add_CFA_offset (reg1,
684 offset - frchain_now->frch_cfi_data->cur_cfa_offset);
688 reg1 = cfi_parse_reg ();
689 cfi_parse_separator ();
690 offset = cfi_parse_const ();
691 cfi_add_CFA_def_cfa (reg1, offset);
694 case DW_CFA_register:
695 reg1 = cfi_parse_reg ();
696 cfi_parse_separator ();
697 reg2 = cfi_parse_reg ();
698 cfi_add_CFA_register (reg1, reg2);
701 case DW_CFA_def_cfa_register:
702 reg1 = cfi_parse_reg ();
703 cfi_add_CFA_def_cfa_register (reg1);
706 case DW_CFA_def_cfa_offset:
707 offset = cfi_parse_const ();
708 cfi_add_CFA_def_cfa_offset (offset);
711 case CFI_adjust_cfa_offset:
712 offset = cfi_parse_const ();
713 cfi_add_CFA_def_cfa_offset (frchain_now->frch_cfi_data->cur_cfa_offset
720 reg1 = cfi_parse_reg ();
721 cfi_add_CFA_restore (reg1);
723 if (*input_line_pointer != ',')
725 ++input_line_pointer;
729 case DW_CFA_undefined:
732 reg1 = cfi_parse_reg ();
733 cfi_add_CFA_undefined (reg1);
735 if (*input_line_pointer != ',')
737 ++input_line_pointer;
741 case DW_CFA_same_value:
742 reg1 = cfi_parse_reg ();
743 cfi_add_CFA_same_value (reg1);
746 case CFI_return_column:
747 reg1 = cfi_parse_reg ();
748 cfi_set_return_column (reg1);
751 case DW_CFA_remember_state:
752 cfi_add_CFA_remember_state ();
755 case DW_CFA_restore_state:
756 cfi_add_CFA_restore_state ();
759 case DW_CFA_GNU_window_save:
760 cfi_add_CFA_insn (DW_CFA_GNU_window_save);
763 case CFI_signal_frame:
764 frchain_now->frch_cfi_data->cur_fde_data->signal_frame = 1;
771 demand_empty_rest_of_line ();
775 dot_cfi_escape (int ignored ATTRIBUTE_UNUSED)
777 struct cfi_escape_data *head, **tail, *e;
778 struct cfi_insn_data *insn;
780 if (frchain_now->frch_cfi_data == NULL)
782 as_bad (_("CFI instruction used without previous .cfi_startproc"));
783 ignore_rest_of_line ();
787 /* If the last address was not at the current PC, advance to current. */
788 if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now
789 || S_GET_VALUE (frchain_now->frch_cfi_data->last_address)
791 cfi_add_advance_loc (symbol_temp_new_now ());
796 e = (struct cfi_escape_data *) xmalloc (sizeof (*e));
797 do_parse_cons_expression (&e->exp, 1);
801 while (*input_line_pointer++ == ',');
804 insn = alloc_cfi_insn_data ();
805 insn->insn = CFI_escape;
808 --input_line_pointer;
809 demand_empty_rest_of_line ();
813 dot_cfi_personality (int ignored ATTRIBUTE_UNUSED)
815 struct fde_entry *fde;
818 if (frchain_now->frch_cfi_data == NULL)
820 as_bad (_("CFI instruction used without previous .cfi_startproc"));
821 ignore_rest_of_line ();
825 fde = frchain_now->frch_cfi_data->cur_fde_data;
826 encoding = cfi_parse_const ();
827 if (encoding == DW_EH_PE_omit)
829 demand_empty_rest_of_line ();
830 fde->per_encoding = encoding;
834 if ((encoding & 0xff) != encoding
835 || ((encoding & 0x70) != 0
836 #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
837 && (encoding & 0x70) != DW_EH_PE_pcrel
840 /* leb128 can be handled, but does something actually need it? */
841 || (encoding & 7) == DW_EH_PE_uleb128
842 || (encoding & 7) > DW_EH_PE_udata8)
844 as_bad (_("invalid or unsupported encoding in .cfi_personality"));
845 ignore_rest_of_line ();
849 if (*input_line_pointer++ != ',')
851 as_bad (_(".cfi_personality requires encoding and symbol arguments"));
852 ignore_rest_of_line ();
856 expression_and_evaluate (&fde->personality);
857 switch (fde->personality.X_op)
862 if ((encoding & 0x70) == DW_EH_PE_pcrel)
863 encoding = DW_EH_PE_omit;
866 encoding = DW_EH_PE_omit;
870 fde->per_encoding = encoding;
872 if (encoding == DW_EH_PE_omit)
874 as_bad (_("wrong second argument to .cfi_personality"));
875 ignore_rest_of_line ();
879 demand_empty_rest_of_line ();
883 dot_cfi_lsda (int ignored ATTRIBUTE_UNUSED)
885 struct fde_entry *fde;
888 if (frchain_now->frch_cfi_data == NULL)
890 as_bad (_("CFI instruction used without previous .cfi_startproc"));
891 ignore_rest_of_line ();
895 fde = frchain_now->frch_cfi_data->cur_fde_data;
896 encoding = cfi_parse_const ();
897 if (encoding == DW_EH_PE_omit)
899 demand_empty_rest_of_line ();
900 fde->lsda_encoding = encoding;
904 if ((encoding & 0xff) != encoding
905 || ((encoding & 0x70) != 0
906 #if CFI_DIFF_LSDA_OK || defined tc_cfi_emit_pcrel_expr
907 && (encoding & 0x70) != DW_EH_PE_pcrel
910 /* leb128 can be handled, but does something actually need it? */
911 || (encoding & 7) == DW_EH_PE_uleb128
912 || (encoding & 7) > DW_EH_PE_udata8)
914 as_bad (_("invalid or unsupported encoding in .cfi_lsda"));
915 ignore_rest_of_line ();
919 if (*input_line_pointer++ != ',')
921 as_bad (_(".cfi_lsda requires encoding and symbol arguments"));
922 ignore_rest_of_line ();
926 fde->lsda_encoding = encoding;
928 expression_and_evaluate (&fde->lsda);
929 switch (fde->lsda.X_op)
934 if ((encoding & 0x70) == DW_EH_PE_pcrel)
935 encoding = DW_EH_PE_omit;
938 encoding = DW_EH_PE_omit;
942 fde->lsda_encoding = encoding;
944 if (encoding == DW_EH_PE_omit)
946 as_bad (_("wrong second argument to .cfi_lsda"));
947 ignore_rest_of_line ();
951 demand_empty_rest_of_line ();
955 dot_cfi_val_encoded_addr (int ignored ATTRIBUTE_UNUSED)
957 struct cfi_insn_data *insn_ptr;
960 if (frchain_now->frch_cfi_data == NULL)
962 as_bad (_("CFI instruction used without previous .cfi_startproc"));
963 ignore_rest_of_line ();
967 /* If the last address was not at the current PC, advance to current. */
968 if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now
969 || S_GET_VALUE (frchain_now->frch_cfi_data->last_address)
971 cfi_add_advance_loc (symbol_temp_new_now ());
973 insn_ptr = alloc_cfi_insn_data ();
974 insn_ptr->insn = CFI_val_encoded_addr;
976 insn_ptr->u.ea.reg = cfi_parse_reg ();
978 cfi_parse_separator ();
979 encoding = cfi_parse_const ();
980 if ((encoding & 0xff) != encoding
981 || ((encoding & 0x70) != 0
982 #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
983 && (encoding & 0x70) != DW_EH_PE_pcrel
986 /* leb128 can be handled, but does something actually need it? */
987 || (encoding & 7) == DW_EH_PE_uleb128
988 || (encoding & 7) > DW_EH_PE_udata8)
990 as_bad (_("invalid or unsupported encoding in .cfi_lsda"));
991 encoding = DW_EH_PE_omit;
994 cfi_parse_separator ();
995 expression_and_evaluate (&insn_ptr->u.ea.exp);
996 switch (insn_ptr->u.ea.exp.X_op)
1001 if ((encoding & 0x70) != DW_EH_PE_pcrel)
1004 encoding = DW_EH_PE_omit;
1008 insn_ptr->u.ea.encoding = encoding;
1009 if (encoding == DW_EH_PE_omit)
1011 as_bad (_("wrong third argument to .cfi_val_encoded_addr"));
1012 ignore_rest_of_line ();
1016 demand_empty_rest_of_line ();
1019 /* By default emit .eh_frame only, not .debug_frame. */
1020 #define CFI_EMIT_eh_frame (1 << 0)
1021 #define CFI_EMIT_debug_frame (1 << 1)
1022 #define CFI_EMIT_target (1 << 2)
1023 static int cfi_sections = CFI_EMIT_eh_frame;
1026 dot_cfi_sections (int ignored ATTRIBUTE_UNUSED)
1031 if (is_name_beginner (*input_line_pointer))
1036 name = input_line_pointer;
1037 c = get_symbol_end ();
1039 if (strncmp (name, ".eh_frame", sizeof ".eh_frame") == 0
1041 sections |= CFI_EMIT_eh_frame;
1042 else if (strncmp (name, ".debug_frame", sizeof ".debug_frame") == 0)
1043 sections |= CFI_EMIT_debug_frame;
1044 #ifdef tc_cfi_section_name
1045 else if (strcmp (name, tc_cfi_section_name) == 0)
1046 sections |= CFI_EMIT_target;
1050 *input_line_pointer = c;
1051 input_line_pointer = name;
1055 *input_line_pointer = c;
1057 if (*input_line_pointer == ',')
1059 name = input_line_pointer++;
1061 if (!is_name_beginner (*input_line_pointer))
1063 input_line_pointer = name;
1067 else if (is_name_beginner (*input_line_pointer))
1071 demand_empty_rest_of_line ();
1072 cfi_sections = sections;
1076 dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED)
1080 if (frchain_now->frch_cfi_data != NULL)
1082 as_bad (_("previous CFI entry not closed (missing .cfi_endproc)"));
1083 ignore_rest_of_line ();
1087 cfi_new_fde (symbol_temp_new_now ());
1090 if (is_name_beginner (*input_line_pointer))
1094 name = input_line_pointer;
1095 c = get_symbol_end ();
1097 if (strcmp (name, "simple") == 0)
1100 *input_line_pointer = c;
1103 input_line_pointer = name;
1105 demand_empty_rest_of_line ();
1107 frchain_now->frch_cfi_data->cur_cfa_offset = 0;
1109 tc_cfi_frame_initial_instructions ();
1111 if ((cfi_sections & CFI_EMIT_target) != 0)
1112 tc_cfi_startproc ();
1116 dot_cfi_endproc (int ignored ATTRIBUTE_UNUSED)
1118 struct fde_entry *fde;
1120 if (frchain_now->frch_cfi_data == NULL)
1122 as_bad (_(".cfi_endproc without corresponding .cfi_startproc"));
1123 ignore_rest_of_line ();
1127 fde = frchain_now->frch_cfi_data->cur_fde_data;
1129 cfi_end_fde (symbol_temp_new_now ());
1131 demand_empty_rest_of_line ();
1133 if ((cfi_sections & CFI_EMIT_target) != 0)
1134 tc_cfi_endproc (fde);
1138 /* Emit a single byte into the current segment. */
1143 FRAG_APPEND_1_CHAR (byte);
1146 /* Emit a two-byte word into the current segment. */
1151 md_number_to_chars (frag_more (2), data, 2);
1154 /* Emit a four byte word into the current segment. */
1159 md_number_to_chars (frag_more (4), data, 4);
1162 /* Emit an unsigned "little-endian base 128" number. */
1165 out_uleb128 (addressT value)
1167 output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0);
1170 /* Emit an unsigned "little-endian base 128" number. */
1173 out_sleb128 (offsetT value)
1175 output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1);
1179 output_cfi_insn (struct cfi_insn_data *insn)
1186 case DW_CFA_advance_loc:
1188 symbolS *from = insn->u.ll.lab1;
1189 symbolS *to = insn->u.ll.lab2;
1191 if (symbol_get_frag (to) == symbol_get_frag (from))
1193 addressT delta = S_GET_VALUE (to) - S_GET_VALUE (from);
1194 addressT scaled = delta / DWARF2_LINE_MIN_INSN_LENGTH;
1197 out_one (DW_CFA_advance_loc + scaled);
1198 else if (scaled <= 0xFF)
1200 out_one (DW_CFA_advance_loc1);
1203 else if (scaled <= 0xFFFF)
1205 out_one (DW_CFA_advance_loc2);
1210 out_one (DW_CFA_advance_loc4);
1218 exp.X_op = O_subtract;
1219 exp.X_add_symbol = to;
1220 exp.X_op_symbol = from;
1221 exp.X_add_number = 0;
1223 /* The code in ehopt.c expects that one byte of the encoding
1224 is already allocated to the frag. This comes from the way
1225 that it scans the .eh_frame section looking first for the
1226 .byte DW_CFA_advance_loc4. */
1227 *frag_more (1) = DW_CFA_advance_loc4;
1229 frag_var (rs_cfa, 4, 0, DWARF2_LINE_MIN_INSN_LENGTH << 3,
1230 make_expr_symbol (&exp), frag_now_fix () - 1,
1236 case DW_CFA_def_cfa:
1237 offset = insn->u.ri.offset;
1240 out_one (DW_CFA_def_cfa_sf);
1241 out_uleb128 (insn->u.ri.reg);
1242 out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT);
1246 out_one (DW_CFA_def_cfa);
1247 out_uleb128 (insn->u.ri.reg);
1248 out_uleb128 (offset);
1252 case DW_CFA_def_cfa_register:
1253 case DW_CFA_undefined:
1254 case DW_CFA_same_value:
1255 out_one (insn->insn);
1256 out_uleb128 (insn->u.r);
1259 case DW_CFA_def_cfa_offset:
1263 out_one (DW_CFA_def_cfa_offset_sf);
1264 out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT);
1268 out_one (DW_CFA_def_cfa_offset);
1269 out_uleb128 (offset);
1273 case DW_CFA_restore:
1277 out_one (DW_CFA_restore + regno);
1281 out_one (DW_CFA_restore_extended);
1282 out_uleb128 (regno);
1287 regno = insn->u.ri.reg;
1288 offset = insn->u.ri.offset / DWARF2_CIE_DATA_ALIGNMENT;
1291 out_one (DW_CFA_offset_extended_sf);
1292 out_uleb128 (regno);
1293 out_sleb128 (offset);
1295 else if (regno <= 0x3F)
1297 out_one (DW_CFA_offset + regno);
1298 out_uleb128 (offset);
1302 out_one (DW_CFA_offset_extended);
1303 out_uleb128 (regno);
1304 out_uleb128 (offset);
1308 case DW_CFA_register:
1309 out_one (DW_CFA_register);
1310 out_uleb128 (insn->u.rr.reg1);
1311 out_uleb128 (insn->u.rr.reg2);
1314 case DW_CFA_remember_state:
1315 case DW_CFA_restore_state:
1316 out_one (insn->insn);
1319 case DW_CFA_GNU_window_save:
1320 out_one (DW_CFA_GNU_window_save);
1325 struct cfi_escape_data *e;
1326 for (e = insn->u.esc; e ; e = e->next)
1327 emit_expr (&e->exp, 1);
1331 case CFI_val_encoded_addr:
1333 unsigned encoding = insn->u.ea.encoding;
1334 offsetT encoding_size;
1336 if (encoding == DW_EH_PE_omit)
1338 out_one (DW_CFA_val_expression);
1339 out_uleb128 (insn->u.ea.reg);
1341 switch (encoding & 0x7)
1343 case DW_EH_PE_absptr:
1344 encoding_size = DWARF2_ADDR_SIZE (stdoutput);
1346 case DW_EH_PE_udata2:
1349 case DW_EH_PE_udata4:
1352 case DW_EH_PE_udata8:
1359 /* If the user has requested absolute encoding,
1360 then use the smaller DW_OP_addr encoding. */
1361 if (insn->u.ea.encoding == DW_EH_PE_absptr)
1363 out_uleb128 (1 + encoding_size);
1364 out_one (DW_OP_addr);
1368 out_uleb128 (1 + 1 + encoding_size);
1369 out_one (DW_OP_GNU_encoded_addr);
1372 if ((encoding & 0x70) == DW_EH_PE_pcrel)
1374 #if CFI_DIFF_EXPR_OK
1375 insn->u.ea.exp.X_op = O_subtract;
1376 insn->u.ea.exp.X_op_symbol = symbol_temp_new_now ();
1377 #elif defined (tc_cfi_emit_pcrel_expr)
1378 tc_cfi_emit_pcrel_expr (&insn->u.ea.exp, encoding_size);
1385 emit_expr (&insn->u.ea.exp, encoding_size);
1395 encoding_size (unsigned char encoding)
1397 if (encoding == DW_EH_PE_omit)
1399 switch (encoding & 0x7)
1402 return bfd_get_arch_size (stdoutput) == 64 ? 8 : 4;
1403 case DW_EH_PE_udata2:
1405 case DW_EH_PE_udata4:
1407 case DW_EH_PE_udata8:
1415 output_cie (struct cie_entry *cie, bfd_boolean eh_frame, int align)
1417 symbolS *after_size_address, *end_address;
1419 struct cfi_insn_data *i;
1420 offsetT augmentation_size;
1422 enum dwarf2_format fmt = DWARF2_FORMAT (now_seg);
1424 cie->start_address = symbol_temp_new_now ();
1425 after_size_address = symbol_temp_make ();
1426 end_address = symbol_temp_make ();
1428 exp.X_op = O_subtract;
1429 exp.X_add_symbol = end_address;
1430 exp.X_op_symbol = after_size_address;
1431 exp.X_add_number = 0;
1433 if (eh_frame || fmt == dwarf2_format_32bit)
1434 emit_expr (&exp, 4); /* Length. */
1437 if (fmt == dwarf2_format_64bit)
1439 emit_expr (&exp, 8); /* Length. */
1441 symbol_set_value_now (after_size_address);
1443 out_four (0); /* CIE id. */
1446 out_four (-1); /* CIE id. */
1447 if (fmt != dwarf2_format_32bit)
1450 out_one (DW_CIE_VERSION); /* Version. */
1453 out_one ('z'); /* Augmentation. */
1454 if (cie->per_encoding != DW_EH_PE_omit)
1456 if (cie->lsda_encoding != DW_EH_PE_omit)
1460 if (cie->signal_frame)
1463 out_uleb128 (DWARF2_LINE_MIN_INSN_LENGTH); /* Code alignment. */
1464 out_sleb128 (DWARF2_CIE_DATA_ALIGNMENT); /* Data alignment. */
1465 if (DW_CIE_VERSION == 1) /* Return column. */
1466 out_one (cie->return_column);
1468 out_uleb128 (cie->return_column);
1471 augmentation_size = 1 + (cie->lsda_encoding != DW_EH_PE_omit);
1472 if (cie->per_encoding != DW_EH_PE_omit)
1473 augmentation_size += 1 + encoding_size (cie->per_encoding);
1474 out_uleb128 (augmentation_size); /* Augmentation size. */
1476 if (cie->per_encoding != DW_EH_PE_omit)
1478 offsetT size = encoding_size (cie->per_encoding);
1479 out_one (cie->per_encoding);
1480 exp = cie->personality;
1481 if ((cie->per_encoding & 0x70) == DW_EH_PE_pcrel)
1483 #if CFI_DIFF_EXPR_OK
1484 exp.X_op = O_subtract;
1485 exp.X_op_symbol = symbol_temp_new_now ();
1486 emit_expr (&exp, size);
1487 #elif defined (tc_cfi_emit_pcrel_expr)
1488 tc_cfi_emit_pcrel_expr (&exp, size);
1494 emit_expr (&exp, size);
1497 if (cie->lsda_encoding != DW_EH_PE_omit)
1498 out_one (cie->lsda_encoding);
1501 switch (DWARF2_FDE_RELOC_SIZE)
1504 enc = DW_EH_PE_sdata2;
1507 enc = DW_EH_PE_sdata4;
1510 enc = DW_EH_PE_sdata8;
1515 #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
1516 enc |= DW_EH_PE_pcrel;
1523 for (i = cie->first; i != cie->last; i = i->next)
1525 if (CUR_SEG (i) != CUR_SEG (cie))
1527 output_cfi_insn (i);
1531 frag_align (align, DW_CFA_nop, 0);
1532 symbol_set_value_now (end_address);
1536 output_fde (struct fde_entry *fde, struct cie_entry *cie,
1537 bfd_boolean eh_frame, struct cfi_insn_data *first,
1540 symbolS *after_size_address, *end_address;
1542 offsetT augmentation_size;
1543 enum dwarf2_format fmt = DWARF2_FORMAT (now_seg);
1547 after_size_address = symbol_temp_make ();
1548 end_address = symbol_temp_make ();
1550 exp.X_op = O_subtract;
1551 exp.X_add_symbol = end_address;
1552 exp.X_op_symbol = after_size_address;
1553 exp.X_add_number = 0;
1554 if (eh_frame || fmt == dwarf2_format_32bit)
1558 if (fmt == dwarf2_format_64bit)
1562 emit_expr (&exp, offset_size); /* Length. */
1563 symbol_set_value_now (after_size_address);
1567 exp.X_op = O_subtract;
1568 exp.X_add_symbol = after_size_address;
1569 exp.X_op_symbol = cie->start_address;
1570 exp.X_add_number = 0;
1571 emit_expr (&exp, offset_size); /* CIE offset. */
1575 TC_DWARF2_EMIT_OFFSET (cie->start_address, offset_size);
1580 exp.X_op = O_subtract;
1581 exp.X_add_number = 0;
1582 #if CFI_DIFF_EXPR_OK
1583 exp.X_add_symbol = fde->start_address;
1584 exp.X_op_symbol = symbol_temp_new_now ();
1585 emit_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */
1587 exp.X_op = O_symbol;
1588 exp.X_add_symbol = fde->start_address;
1589 #ifdef tc_cfi_emit_pcrel_expr
1590 tc_cfi_emit_pcrel_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */
1592 emit_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */
1595 addr_size = DWARF2_FDE_RELOC_SIZE;
1599 exp.X_op = O_symbol;
1600 exp.X_add_symbol = fde->start_address;
1601 exp.X_add_number = 0;
1602 addr_size = DWARF2_ADDR_SIZE (stdoutput);
1603 emit_expr (&exp, addr_size);
1606 exp.X_op = O_subtract;
1607 exp.X_add_symbol = fde->end_address;
1608 exp.X_op_symbol = fde->start_address; /* Code length. */
1609 exp.X_add_number = 0;
1610 emit_expr (&exp, addr_size);
1612 augmentation_size = encoding_size (fde->lsda_encoding);
1614 out_uleb128 (augmentation_size); /* Augmentation size. */
1616 if (fde->lsda_encoding != DW_EH_PE_omit)
1619 if ((fde->lsda_encoding & 0x70) == DW_EH_PE_pcrel)
1621 #if CFI_DIFF_LSDA_OK
1622 exp.X_op = O_subtract;
1623 exp.X_op_symbol = symbol_temp_new_now ();
1624 emit_expr (&exp, augmentation_size);
1625 #elif defined (tc_cfi_emit_pcrel_expr)
1626 tc_cfi_emit_pcrel_expr (&exp, augmentation_size);
1632 emit_expr (&exp, augmentation_size);
1635 for (; first; first = first->next)
1636 if (CUR_SEG (first) == CUR_SEG (fde))
1637 output_cfi_insn (first);
1639 frag_align (align, DW_CFA_nop, 0);
1640 symbol_set_value_now (end_address);
1643 static struct cie_entry *
1644 select_cie_for_fde (struct fde_entry *fde, bfd_boolean eh_frame,
1645 struct cfi_insn_data **pfirst, int align)
1647 struct cfi_insn_data *i, *j;
1648 struct cie_entry *cie;
1650 for (cie = cie_root; cie; cie = cie->next)
1652 if (CUR_SEG (cie) != CUR_SEG (fde))
1654 if (cie->return_column != fde->return_column
1655 || cie->signal_frame != fde->signal_frame
1656 || cie->per_encoding != fde->per_encoding
1657 || cie->lsda_encoding != fde->lsda_encoding)
1659 if (cie->per_encoding != DW_EH_PE_omit)
1661 if (cie->personality.X_op != fde->personality.X_op
1662 || cie->personality.X_add_number
1663 != fde->personality.X_add_number)
1665 switch (cie->personality.X_op)
1668 if (cie->personality.X_unsigned != fde->personality.X_unsigned)
1672 if (cie->personality.X_add_symbol
1673 != fde->personality.X_add_symbol)
1680 for (i = cie->first, j = fde->data;
1681 i != cie->last && j != NULL;
1682 i = i->next, j = j->next)
1684 if (i->insn != j->insn)
1688 case DW_CFA_advance_loc:
1689 case DW_CFA_remember_state:
1690 /* We reached the first advance/remember in the FDE,
1691 but did not reach the end of the CIE list. */
1695 case DW_CFA_def_cfa:
1696 if (i->u.ri.reg != j->u.ri.reg)
1698 if (i->u.ri.offset != j->u.ri.offset)
1702 case DW_CFA_register:
1703 if (i->u.rr.reg1 != j->u.rr.reg1)
1705 if (i->u.rr.reg2 != j->u.rr.reg2)
1709 case DW_CFA_def_cfa_register:
1710 case DW_CFA_restore:
1711 case DW_CFA_undefined:
1712 case DW_CFA_same_value:
1713 if (i->u.r != j->u.r)
1717 case DW_CFA_def_cfa_offset:
1718 if (i->u.i != j->u.i)
1723 case CFI_val_encoded_addr:
1724 /* Don't bother matching these for now. */
1732 /* Success if we reached the end of the CIE list, and we've either
1733 run out of FDE entries or we've encountered an advance,
1734 remember, or escape. */
1737 || j->insn == DW_CFA_advance_loc
1738 || j->insn == DW_CFA_remember_state
1739 || j->insn == CFI_escape
1740 || j->insn == CFI_val_encoded_addr))
1749 cie = (struct cie_entry *) xmalloc (sizeof (struct cie_entry));
1750 cie->next = cie_root;
1752 SET_CUR_SEG (cie, CUR_SEG (fde));
1753 cie->return_column = fde->return_column;
1754 cie->signal_frame = fde->signal_frame;
1755 cie->per_encoding = fde->per_encoding;
1756 cie->lsda_encoding = fde->lsda_encoding;
1757 cie->personality = fde->personality;
1758 cie->first = fde->data;
1760 for (i = cie->first; i ; i = i->next)
1761 if (i->insn == DW_CFA_advance_loc
1762 || i->insn == DW_CFA_remember_state
1763 || i->insn == CFI_escape
1764 || i->insn == CFI_val_encoded_addr)
1770 output_cie (cie, eh_frame, align);
1775 #ifdef md_reg_eh_frame_to_debug_frame
1777 cfi_change_reg_numbers (struct cfi_insn_data *insn, segT ccseg)
1779 for (; insn; insn = insn->next)
1781 if (CUR_SEG (insn) != ccseg)
1785 case DW_CFA_advance_loc:
1786 case DW_CFA_def_cfa_offset:
1787 case DW_CFA_remember_state:
1788 case DW_CFA_restore_state:
1789 case DW_CFA_GNU_window_save:
1793 case DW_CFA_def_cfa:
1795 insn->u.ri.reg = md_reg_eh_frame_to_debug_frame (insn->u.ri.reg);
1798 case DW_CFA_def_cfa_register:
1799 case DW_CFA_undefined:
1800 case DW_CFA_same_value:
1801 case DW_CFA_restore:
1802 insn->u.r = md_reg_eh_frame_to_debug_frame (insn->u.r);
1805 case DW_CFA_register:
1806 insn->u.rr.reg1 = md_reg_eh_frame_to_debug_frame (insn->u.rr.reg1);
1807 insn->u.rr.reg2 = md_reg_eh_frame_to_debug_frame (insn->u.rr.reg2);
1810 case CFI_val_encoded_addr:
1811 insn->u.ea.reg = md_reg_eh_frame_to_debug_frame (insn->u.ea.reg);
1820 #define cfi_change_reg_numbers(insn, cseg) do { } while (0)
1824 get_cfi_seg (segT cseg, const char *base, flagword flags, int align)
1826 if (SUPPORT_FRAME_LINKONCE)
1828 struct dwcfi_seg_list *l;
1830 l = dwcfi_hash_find_or_make (cseg, base, flags);
1833 subseg_set (cseg, l->subseg);
1837 cseg = subseg_new (base, 0);
1838 bfd_set_section_flags (stdoutput, cseg, flags);
1840 record_alignment (cseg, align);
1847 struct cie_entry *cie, *cie_next;
1848 segT cfi_seg, ccseg;
1849 struct fde_entry *fde;
1850 struct cfi_insn_data *first;
1851 int save_flag_traditional_format, seek_next_seg;
1853 if (all_fde_data == 0)
1856 if ((cfi_sections & CFI_EMIT_eh_frame) != 0)
1858 /* Make sure check_eh_frame doesn't do anything with our output. */
1859 save_flag_traditional_format = flag_traditional_format;
1860 flag_traditional_format = 1;
1862 if (!SUPPORT_FRAME_LINKONCE)
1864 /* Open .eh_frame section. */
1865 cfi_seg = get_cfi_seg (NULL, ".eh_frame",
1866 (SEC_ALLOC | SEC_LOAD | SEC_DATA
1867 | DWARF2_EH_FRAME_READ_ONLY),
1868 EH_FRAME_ALIGNMENT);
1869 #ifdef md_fix_up_eh_frame
1870 md_fix_up_eh_frame (cfi_seg);
1881 for (cie = cie_root; cie; cie = cie_next)
1883 cie_next = cie->next;
1884 free ((void *) cie);
1888 for (fde = all_fde_data; fde ; fde = fde->next)
1890 if (SUPPORT_FRAME_LINKONCE)
1894 if (seek_next_seg && CUR_SEG (fde) != ccseg)
1901 ccseg = CUR_SEG (fde);
1902 /* Open .eh_frame section. */
1903 cfi_seg = get_cfi_seg (ccseg, ".eh_frame",
1904 (SEC_ALLOC | SEC_LOAD | SEC_DATA
1905 | DWARF2_EH_FRAME_READ_ONLY),
1906 EH_FRAME_ALIGNMENT);
1907 #ifdef md_fix_up_eh_frame
1908 md_fix_up_eh_frame (cfi_seg);
1914 SET_HANDLED (fde, 1);
1917 if (fde->end_address == NULL)
1919 as_bad (_("open CFI at the end of file; missing .cfi_endproc directive"));
1920 fde->end_address = fde->start_address;
1923 cie = select_cie_for_fde (fde, TRUE, &first, 2);
1924 output_fde (fde, cie, TRUE, first,
1925 fde->next == NULL ? EH_FRAME_ALIGNMENT : 2);
1928 while (SUPPORT_FRAME_LINKONCE && seek_next_seg == 2);
1930 if (SUPPORT_FRAME_LINKONCE)
1931 for (fde = all_fde_data; fde ; fde = fde->next)
1932 SET_HANDLED (fde, 0);
1934 flag_traditional_format = save_flag_traditional_format;
1937 if ((cfi_sections & CFI_EMIT_debug_frame) != 0)
1939 int alignment = ffs (DWARF2_ADDR_SIZE (stdoutput)) - 1;
1941 if (!SUPPORT_FRAME_LINKONCE)
1942 get_cfi_seg (NULL, ".debug_frame",
1943 SEC_READONLY | SEC_DEBUGGING,
1951 for (cie = cie_root; cie; cie = cie_next)
1953 cie_next = cie->next;
1954 free ((void *) cie);
1958 for (fde = all_fde_data; fde ; fde = fde->next)
1960 if (SUPPORT_FRAME_LINKONCE)
1964 if (seek_next_seg && CUR_SEG (fde) != ccseg)
1971 ccseg = CUR_SEG (fde);
1972 /* Open .debug_frame section. */
1973 get_cfi_seg (ccseg, ".debug_frame",
1974 SEC_READONLY | SEC_DEBUGGING,
1978 SET_HANDLED (fde, 1);
1980 if (fde->end_address == NULL)
1982 as_bad (_("open CFI at the end of file; missing .cfi_endproc directive"));
1983 fde->end_address = fde->start_address;
1986 fde->per_encoding = DW_EH_PE_omit;
1987 fde->lsda_encoding = DW_EH_PE_omit;
1988 cfi_change_reg_numbers (fde->data, ccseg);
1989 cie = select_cie_for_fde (fde, FALSE, &first, alignment);
1990 output_fde (fde, cie, FALSE, first, alignment);
1993 while (SUPPORT_FRAME_LINKONCE && seek_next_seg == 2);
1995 if (SUPPORT_FRAME_LINKONCE)
1996 for (fde = all_fde_data; fde ; fde = fde->next)
1997 SET_HANDLED (fde, 0);
2001 #else /* TARGET_USE_CFIPOP */
2003 /* Emit an intelligible error message for missing support. */
2006 dot_cfi_dummy (int ignored ATTRIBUTE_UNUSED)
2008 as_bad (_("CFI is not supported for this target"));
2009 ignore_rest_of_line ();
2012 const pseudo_typeS cfi_pseudo_table[] =
2014 { "cfi_sections", dot_cfi_dummy, 0 },
2015 { "cfi_startproc", dot_cfi_dummy, 0 },
2016 { "cfi_endproc", dot_cfi_dummy, 0 },
2017 { "cfi_def_cfa", dot_cfi_dummy, 0 },
2018 { "cfi_def_cfa_register", dot_cfi_dummy, 0 },
2019 { "cfi_def_cfa_offset", dot_cfi_dummy, 0 },
2020 { "cfi_adjust_cfa_offset", dot_cfi_dummy, 0 },
2021 { "cfi_offset", dot_cfi_dummy, 0 },
2022 { "cfi_rel_offset", dot_cfi_dummy, 0 },
2023 { "cfi_register", dot_cfi_dummy, 0 },
2024 { "cfi_return_column", dot_cfi_dummy, 0 },
2025 { "cfi_restore", dot_cfi_dummy, 0 },
2026 { "cfi_undefined", dot_cfi_dummy, 0 },
2027 { "cfi_same_value", dot_cfi_dummy, 0 },
2028 { "cfi_remember_state", dot_cfi_dummy, 0 },
2029 { "cfi_restore_state", dot_cfi_dummy, 0 },
2030 { "cfi_window_save", dot_cfi_dummy, 0 },
2031 { "cfi_escape", dot_cfi_dummy, 0 },
2032 { "cfi_signal_frame", dot_cfi_dummy, 0 },
2033 { "cfi_personality", dot_cfi_dummy, 0 },
2034 { "cfi_lsda", dot_cfi_dummy, 0 },
2035 { "cfi_val_encoded_addr", dot_cfi_dummy, 0 },
2043 #endif /* TARGET_USE_CFIPOP */