1 /* dw2gencfi.c - Support for generating Dwarf2 CFI information.
2 Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
3 Free Software Foundation, Inc.
4 Contributed by Michal Ludvig <mludvig@suse.cz>
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
24 #include "dw2gencfi.h"
26 #include "dwarf2dbg.h"
28 #ifdef TARGET_USE_CFIPOP
30 /* By default, use difference expressions if DIFF_EXPR_OK is defined. */
31 #ifndef CFI_DIFF_EXPR_OK
33 # define CFI_DIFF_EXPR_OK 1
35 # define CFI_DIFF_EXPR_OK 0
39 #ifndef CFI_DIFF_LSDA_OK
40 #define CFI_DIFF_LSDA_OK CFI_DIFF_EXPR_OK
43 #if CFI_DIFF_EXPR_OK == 1 && CFI_DIFF_LSDA_OK == 0
44 # error "CFI_DIFF_EXPR_OK should imply CFI_DIFF_LSDA_OK"
47 /* We re-use DWARF2_LINE_MIN_INSN_LENGTH for the code alignment field
48 of the CIE. Default to 1 if not otherwise specified. */
49 #ifndef DWARF2_LINE_MIN_INSN_LENGTH
50 #define DWARF2_LINE_MIN_INSN_LENGTH 1
53 /* By default, use 32-bit relocations from .eh_frame into .text. */
54 #ifndef DWARF2_FDE_RELOC_SIZE
55 #define DWARF2_FDE_RELOC_SIZE 4
58 /* By default, use a read-only .eh_frame section. */
59 #ifndef DWARF2_EH_FRAME_READ_ONLY
60 #define DWARF2_EH_FRAME_READ_ONLY SEC_READONLY
63 #ifndef EH_FRAME_ALIGNMENT
64 #define EH_FRAME_ALIGNMENT (bfd_get_arch_size (stdoutput) == 64 ? 3 : 2)
67 #ifndef tc_cfi_frame_initial_instructions
68 #define tc_cfi_frame_initial_instructions() ((void)0)
71 #ifndef tc_cfi_startproc
72 # define tc_cfi_startproc() ((void)0)
75 #ifndef tc_cfi_endproc
76 # define tc_cfi_endproc(fde) ((void) (fde))
80 #define DWARF2_FORMAT(SEC) dwarf2_format_32bit
83 #ifndef DWARF2_ADDR_SIZE
84 #define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8)
87 #if SUPPORT_FRAME_LINKONCE
88 #define CUR_SEG(structp) structp->cur_seg
89 #define SET_CUR_SEG(structp, seg) structp->cur_seg = seg
90 #define HANDLED(structp) structp->handled
91 #define SET_HANDLED(structp, val) structp->handled = val
93 #define CUR_SEG(structp) NULL
94 #define SET_CUR_SEG(structp, seg) (void) (0 && seg)
95 #define HANDLED(structp) 0
96 #define SET_HANDLED(structp, val) (void) (0 && val)
99 /* Private segment collection list. */
100 struct dwcfi_seg_list
107 #define FRAME_NAME ".eh_frame"
109 static struct hash_control *dwcfi_hash;
111 /* Build based on segment the derived .debug_...
112 segment name containing origin segment's postfix name part. */
115 get_debugseg_name (segT seg, const char *base_name)
126 name = bfd_get_section_name (stdoutput, seg);
128 dollar = strchr (name, '$');
129 dot = strchr (name + 1, '.');
137 else if (dot < dollar)
143 return concat (base_name, name, NULL);
146 /* Allocate a dwcfi_seg_list structure. */
148 static struct dwcfi_seg_list *
149 alloc_debugseg_item (segT seg, int subseg, char *name)
151 struct dwcfi_seg_list *r;
153 r = (struct dwcfi_seg_list *)
154 xmalloc (sizeof (struct dwcfi_seg_list) + strlen (name));
162 is_now_linkonce_segment (void)
164 if ((bfd_get_section_flags (stdoutput, now_seg)
165 & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD
166 | SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE
167 | SEC_LINK_DUPLICATES_SAME_CONTENTS)) != 0)
172 /* Generate debug... segment with same linkonce properties
176 make_debug_seg (segT cseg, char *name, int sflags)
178 segT save_seg = now_seg;
179 int save_subseg = now_subseg;
183 r = subseg_new (name, 0);
185 /* Check if code segment is marked as linked once. */
189 flags = bfd_get_section_flags (stdoutput, cseg)
190 & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD
191 | SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE
192 | SEC_LINK_DUPLICATES_SAME_CONTENTS);
194 /* Add standard section flags. */
197 /* Apply possibly linked once flags to new generated segment, too. */
198 if (!bfd_set_section_flags (stdoutput, r, flags))
199 as_bad (_("bfd_set_section_flags: %s"),
200 bfd_errmsg (bfd_get_error ()));
202 /* Restore to previous segment. */
203 if (save_seg != NULL)
204 subseg_set (save_seg, save_subseg);
209 dwcfi_hash_insert (const char *name, struct dwcfi_seg_list *item)
211 const char *error_string;
213 if ((error_string = hash_jam (dwcfi_hash, name, (char *) item)))
214 as_fatal (_("Inserting \"%s\" into structure table failed: %s"),
218 static struct dwcfi_seg_list *
219 dwcfi_hash_find (char *name)
221 return (struct dwcfi_seg_list *) hash_find (dwcfi_hash, name);
224 static struct dwcfi_seg_list *
225 dwcfi_hash_find_or_make (segT cseg, const char *base_name, int flags)
227 struct dwcfi_seg_list *item;
230 /* Initialize dwcfi_hash once. */
232 dwcfi_hash = hash_new ();
234 name = get_debugseg_name (cseg, base_name);
236 item = dwcfi_hash_find (name);
239 item = alloc_debugseg_item (make_debug_seg (cseg, name, flags), 0, name);
241 dwcfi_hash_insert (item->seg_name, item);
249 /* ??? Share this with dwarf2cfg.c. */
250 #ifndef TC_DWARF2_EMIT_OFFSET
251 #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset
253 /* Create an offset to .dwarf2_*. */
256 generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size)
261 exp.X_add_symbol = symbol;
262 exp.X_add_number = 0;
263 emit_expr (&exp, size);
267 struct cfi_escape_data
269 struct cfi_escape_data *next;
275 struct cie_entry *next;
276 #if SUPPORT_FRAME_LINKONCE
279 symbolS *start_address;
280 unsigned int return_column;
281 unsigned int signal_frame;
282 unsigned char per_encoding;
283 unsigned char lsda_encoding;
284 expressionS personality;
285 struct cfi_insn_data *first, *last;
288 /* List of FDE entries. */
290 struct fde_entry *all_fde_data;
291 static struct fde_entry **last_fde_data = &all_fde_data;
293 /* List of CIEs so that they could be reused. */
294 static struct cie_entry *cie_root;
296 /* Stack of old CFI data, for save/restore. */
299 struct cfa_save_data *next;
303 /* Current open FDE entry. */
306 struct fde_entry *cur_fde_data;
307 symbolS *last_address;
308 offsetT cur_cfa_offset;
309 struct cfa_save_data *cfa_save_stack;
312 /* Construct a new FDE structure and add it to the end of the fde list. */
314 static struct fde_entry *
315 alloc_fde_entry (void)
317 struct fde_entry *fde = (struct fde_entry *)
318 xcalloc (1, sizeof (struct fde_entry));
320 frchain_now->frch_cfi_data = (struct frch_cfi_data *)
321 xcalloc (1, sizeof (struct frch_cfi_data));
322 frchain_now->frch_cfi_data->cur_fde_data = fde;
323 *last_fde_data = fde;
324 last_fde_data = &fde->next;
325 SET_CUR_SEG (fde, is_now_linkonce_segment ());
326 SET_HANDLED (fde, 0);
327 fde->last = &fde->data;
328 fde->return_column = DWARF2_DEFAULT_RETURN_COLUMN;
329 fde->per_encoding = DW_EH_PE_omit;
330 fde->lsda_encoding = DW_EH_PE_omit;
335 /* The following functions are available for a backend to construct its
336 own unwind information, usually from legacy unwind directives. */
338 /* Construct a new INSN structure and add it to the end of the insn list
339 for the currently active FDE. */
341 static struct cfi_insn_data *
342 alloc_cfi_insn_data (void)
344 struct cfi_insn_data *insn = (struct cfi_insn_data *)
345 xcalloc (1, sizeof (struct cfi_insn_data));
346 struct fde_entry *cur_fde_data = frchain_now->frch_cfi_data->cur_fde_data;
348 *cur_fde_data->last = insn;
349 cur_fde_data->last = &insn->next;
350 SET_CUR_SEG (insn, is_now_linkonce_segment ());
354 /* Construct a new FDE structure that begins at LABEL. */
357 cfi_new_fde (symbolS *label)
359 struct fde_entry *fde = alloc_fde_entry ();
360 fde->start_address = label;
361 frchain_now->frch_cfi_data->last_address = label;
364 /* End the currently open FDE. */
367 cfi_end_fde (symbolS *label)
369 frchain_now->frch_cfi_data->cur_fde_data->end_address = label;
370 free (frchain_now->frch_cfi_data);
371 frchain_now->frch_cfi_data = NULL;
374 /* Set the return column for the current FDE. */
377 cfi_set_return_column (unsigned regno)
379 frchain_now->frch_cfi_data->cur_fde_data->return_column = regno;
382 /* Universal functions to store new instructions. */
385 cfi_add_CFA_insn (int insn)
387 struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
389 insn_ptr->insn = insn;
393 cfi_add_CFA_insn_reg (int insn, unsigned regno)
395 struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
397 insn_ptr->insn = insn;
398 insn_ptr->u.r = regno;
402 cfi_add_CFA_insn_offset (int insn, offsetT offset)
404 struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
406 insn_ptr->insn = insn;
407 insn_ptr->u.i = offset;
411 cfi_add_CFA_insn_reg_reg (int insn, unsigned reg1, unsigned reg2)
413 struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
415 insn_ptr->insn = insn;
416 insn_ptr->u.rr.reg1 = reg1;
417 insn_ptr->u.rr.reg2 = reg2;
421 cfi_add_CFA_insn_reg_offset (int insn, unsigned regno, offsetT offset)
423 struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
425 insn_ptr->insn = insn;
426 insn_ptr->u.ri.reg = regno;
427 insn_ptr->u.ri.offset = offset;
430 /* Add a CFI insn to advance the PC from the last address to LABEL. */
433 cfi_add_advance_loc (symbolS *label)
435 struct cfi_insn_data *insn = alloc_cfi_insn_data ();
437 insn->insn = DW_CFA_advance_loc;
438 insn->u.ll.lab1 = frchain_now->frch_cfi_data->last_address;
439 insn->u.ll.lab2 = label;
441 frchain_now->frch_cfi_data->last_address = label;
444 /* Add a DW_CFA_offset record to the CFI data. */
447 cfi_add_CFA_offset (unsigned regno, offsetT offset)
449 unsigned int abs_data_align;
451 gas_assert (DWARF2_CIE_DATA_ALIGNMENT != 0);
452 cfi_add_CFA_insn_reg_offset (DW_CFA_offset, regno, offset);
454 abs_data_align = (DWARF2_CIE_DATA_ALIGNMENT < 0
455 ? -DWARF2_CIE_DATA_ALIGNMENT : DWARF2_CIE_DATA_ALIGNMENT);
456 if (offset % abs_data_align)
457 as_bad (_("register save offset not a multiple of %u"), abs_data_align);
460 /* Add a DW_CFA_def_cfa record to the CFI data. */
463 cfi_add_CFA_def_cfa (unsigned regno, offsetT offset)
465 cfi_add_CFA_insn_reg_offset (DW_CFA_def_cfa, regno, offset);
466 frchain_now->frch_cfi_data->cur_cfa_offset = offset;
469 /* Add a DW_CFA_register record to the CFI data. */
472 cfi_add_CFA_register (unsigned reg1, unsigned reg2)
474 cfi_add_CFA_insn_reg_reg (DW_CFA_register, reg1, reg2);
477 /* Add a DW_CFA_def_cfa_register record to the CFI data. */
480 cfi_add_CFA_def_cfa_register (unsigned regno)
482 cfi_add_CFA_insn_reg (DW_CFA_def_cfa_register, regno);
485 /* Add a DW_CFA_def_cfa_offset record to the CFI data. */
488 cfi_add_CFA_def_cfa_offset (offsetT offset)
490 cfi_add_CFA_insn_offset (DW_CFA_def_cfa_offset, offset);
491 frchain_now->frch_cfi_data->cur_cfa_offset = offset;
495 cfi_add_CFA_restore (unsigned regno)
497 cfi_add_CFA_insn_reg (DW_CFA_restore, regno);
501 cfi_add_CFA_undefined (unsigned regno)
503 cfi_add_CFA_insn_reg (DW_CFA_undefined, regno);
507 cfi_add_CFA_same_value (unsigned regno)
509 cfi_add_CFA_insn_reg (DW_CFA_same_value, regno);
513 cfi_add_CFA_remember_state (void)
515 struct cfa_save_data *p;
517 cfi_add_CFA_insn (DW_CFA_remember_state);
519 p = (struct cfa_save_data *) xmalloc (sizeof (*p));
520 p->cfa_offset = frchain_now->frch_cfi_data->cur_cfa_offset;
521 p->next = frchain_now->frch_cfi_data->cfa_save_stack;
522 frchain_now->frch_cfi_data->cfa_save_stack = p;
526 cfi_add_CFA_restore_state (void)
528 struct cfa_save_data *p;
530 cfi_add_CFA_insn (DW_CFA_restore_state);
532 p = frchain_now->frch_cfi_data->cfa_save_stack;
535 frchain_now->frch_cfi_data->cur_cfa_offset = p->cfa_offset;
536 frchain_now->frch_cfi_data->cfa_save_stack = p->next;
540 as_bad (_("CFI state restore without previous remember"));
544 /* Parse CFI assembler directives. */
546 static void dot_cfi (int);
547 static void dot_cfi_escape (int);
548 static void dot_cfi_sections (int);
549 static void dot_cfi_startproc (int);
550 static void dot_cfi_endproc (int);
551 static void dot_cfi_personality (int);
552 static void dot_cfi_lsda (int);
553 static void dot_cfi_val_encoded_addr (int);
555 const pseudo_typeS cfi_pseudo_table[] =
557 { "cfi_sections", dot_cfi_sections, 0 },
558 { "cfi_startproc", dot_cfi_startproc, 0 },
559 { "cfi_endproc", dot_cfi_endproc, 0 },
560 { "cfi_def_cfa", dot_cfi, DW_CFA_def_cfa },
561 { "cfi_def_cfa_register", dot_cfi, DW_CFA_def_cfa_register },
562 { "cfi_def_cfa_offset", dot_cfi, DW_CFA_def_cfa_offset },
563 { "cfi_adjust_cfa_offset", dot_cfi, CFI_adjust_cfa_offset },
564 { "cfi_offset", dot_cfi, DW_CFA_offset },
565 { "cfi_rel_offset", dot_cfi, CFI_rel_offset },
566 { "cfi_register", dot_cfi, DW_CFA_register },
567 { "cfi_return_column", dot_cfi, CFI_return_column },
568 { "cfi_restore", dot_cfi, DW_CFA_restore },
569 { "cfi_undefined", dot_cfi, DW_CFA_undefined },
570 { "cfi_same_value", dot_cfi, DW_CFA_same_value },
571 { "cfi_remember_state", dot_cfi, DW_CFA_remember_state },
572 { "cfi_restore_state", dot_cfi, DW_CFA_restore_state },
573 { "cfi_window_save", dot_cfi, DW_CFA_GNU_window_save },
574 { "cfi_escape", dot_cfi_escape, 0 },
575 { "cfi_signal_frame", dot_cfi, CFI_signal_frame },
576 { "cfi_personality", dot_cfi_personality, 0 },
577 { "cfi_lsda", dot_cfi_lsda, 0 },
578 { "cfi_val_encoded_addr", dot_cfi_val_encoded_addr, 0 },
583 cfi_parse_separator (void)
586 if (*input_line_pointer == ',')
587 input_line_pointer++;
589 as_bad (_("missing separator"));
592 #ifndef tc_parse_to_dw2regnum
594 tc_parse_to_dw2regnum (expressionS *exp)
596 # ifdef tc_regname_to_dw2regnum
598 if (is_name_beginner (*input_line_pointer)
599 || (*input_line_pointer == '%'
600 && is_name_beginner (*++input_line_pointer)))
604 name = input_line_pointer;
605 c = get_symbol_end ();
607 exp->X_op = O_constant;
608 exp->X_add_number = tc_regname_to_dw2regnum (name);
610 *input_line_pointer = c;
614 expression_and_evaluate (exp);
624 tc_parse_to_dw2regnum (&exp);
629 regno = exp.X_add_number;
639 as_bad (_("bad register expression"));
647 cfi_parse_const (void)
649 return get_absolute_expression ();
658 if (frchain_now->frch_cfi_data == NULL)
660 as_bad (_("CFI instruction used without previous .cfi_startproc"));
661 ignore_rest_of_line ();
665 /* If the last address was not at the current PC, advance to current. */
666 if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now
667 || S_GET_VALUE (frchain_now->frch_cfi_data->last_address)
669 cfi_add_advance_loc (symbol_temp_new_now ());
674 reg1 = cfi_parse_reg ();
675 cfi_parse_separator ();
676 offset = cfi_parse_const ();
677 cfi_add_CFA_offset (reg1, offset);
681 reg1 = cfi_parse_reg ();
682 cfi_parse_separator ();
683 offset = cfi_parse_const ();
684 cfi_add_CFA_offset (reg1,
685 offset - frchain_now->frch_cfi_data->cur_cfa_offset);
689 reg1 = cfi_parse_reg ();
690 cfi_parse_separator ();
691 offset = cfi_parse_const ();
692 cfi_add_CFA_def_cfa (reg1, offset);
695 case DW_CFA_register:
696 reg1 = cfi_parse_reg ();
697 cfi_parse_separator ();
698 reg2 = cfi_parse_reg ();
699 cfi_add_CFA_register (reg1, reg2);
702 case DW_CFA_def_cfa_register:
703 reg1 = cfi_parse_reg ();
704 cfi_add_CFA_def_cfa_register (reg1);
707 case DW_CFA_def_cfa_offset:
708 offset = cfi_parse_const ();
709 cfi_add_CFA_def_cfa_offset (offset);
712 case CFI_adjust_cfa_offset:
713 offset = cfi_parse_const ();
714 cfi_add_CFA_def_cfa_offset (frchain_now->frch_cfi_data->cur_cfa_offset
721 reg1 = cfi_parse_reg ();
722 cfi_add_CFA_restore (reg1);
724 if (*input_line_pointer != ',')
726 ++input_line_pointer;
730 case DW_CFA_undefined:
733 reg1 = cfi_parse_reg ();
734 cfi_add_CFA_undefined (reg1);
736 if (*input_line_pointer != ',')
738 ++input_line_pointer;
742 case DW_CFA_same_value:
743 reg1 = cfi_parse_reg ();
744 cfi_add_CFA_same_value (reg1);
747 case CFI_return_column:
748 reg1 = cfi_parse_reg ();
749 cfi_set_return_column (reg1);
752 case DW_CFA_remember_state:
753 cfi_add_CFA_remember_state ();
756 case DW_CFA_restore_state:
757 cfi_add_CFA_restore_state ();
760 case DW_CFA_GNU_window_save:
761 cfi_add_CFA_insn (DW_CFA_GNU_window_save);
764 case CFI_signal_frame:
765 frchain_now->frch_cfi_data->cur_fde_data->signal_frame = 1;
772 demand_empty_rest_of_line ();
776 dot_cfi_escape (int ignored ATTRIBUTE_UNUSED)
778 struct cfi_escape_data *head, **tail, *e;
779 struct cfi_insn_data *insn;
781 if (frchain_now->frch_cfi_data == NULL)
783 as_bad (_("CFI instruction used without previous .cfi_startproc"));
784 ignore_rest_of_line ();
788 /* If the last address was not at the current PC, advance to current. */
789 if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now
790 || S_GET_VALUE (frchain_now->frch_cfi_data->last_address)
792 cfi_add_advance_loc (symbol_temp_new_now ());
797 e = (struct cfi_escape_data *) xmalloc (sizeof (*e));
798 do_parse_cons_expression (&e->exp, 1);
802 while (*input_line_pointer++ == ',');
805 insn = alloc_cfi_insn_data ();
806 insn->insn = CFI_escape;
809 --input_line_pointer;
810 demand_empty_rest_of_line ();
814 dot_cfi_personality (int ignored ATTRIBUTE_UNUSED)
816 struct fde_entry *fde;
819 if (frchain_now->frch_cfi_data == NULL)
821 as_bad (_("CFI instruction used without previous .cfi_startproc"));
822 ignore_rest_of_line ();
826 fde = frchain_now->frch_cfi_data->cur_fde_data;
827 encoding = cfi_parse_const ();
828 if (encoding == DW_EH_PE_omit)
830 demand_empty_rest_of_line ();
831 fde->per_encoding = encoding;
835 if ((encoding & 0xff) != encoding
836 || ((encoding & 0x70) != 0
837 #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
838 && (encoding & 0x70) != DW_EH_PE_pcrel
841 /* leb128 can be handled, but does something actually need it? */
842 || (encoding & 7) == DW_EH_PE_uleb128
843 || (encoding & 7) > DW_EH_PE_udata8)
845 as_bad (_("invalid or unsupported encoding in .cfi_personality"));
846 ignore_rest_of_line ();
850 if (*input_line_pointer++ != ',')
852 as_bad (_(".cfi_personality requires encoding and symbol arguments"));
853 ignore_rest_of_line ();
857 expression_and_evaluate (&fde->personality);
858 switch (fde->personality.X_op)
863 if ((encoding & 0x70) == DW_EH_PE_pcrel)
864 encoding = DW_EH_PE_omit;
867 encoding = DW_EH_PE_omit;
871 fde->per_encoding = encoding;
873 if (encoding == DW_EH_PE_omit)
875 as_bad (_("wrong second argument to .cfi_personality"));
876 ignore_rest_of_line ();
880 demand_empty_rest_of_line ();
884 dot_cfi_lsda (int ignored ATTRIBUTE_UNUSED)
886 struct fde_entry *fde;
889 if (frchain_now->frch_cfi_data == NULL)
891 as_bad (_("CFI instruction used without previous .cfi_startproc"));
892 ignore_rest_of_line ();
896 fde = frchain_now->frch_cfi_data->cur_fde_data;
897 encoding = cfi_parse_const ();
898 if (encoding == DW_EH_PE_omit)
900 demand_empty_rest_of_line ();
901 fde->lsda_encoding = encoding;
905 if ((encoding & 0xff) != encoding
906 || ((encoding & 0x70) != 0
907 #if CFI_DIFF_LSDA_OK || defined tc_cfi_emit_pcrel_expr
908 && (encoding & 0x70) != DW_EH_PE_pcrel
911 /* leb128 can be handled, but does something actually need it? */
912 || (encoding & 7) == DW_EH_PE_uleb128
913 || (encoding & 7) > DW_EH_PE_udata8)
915 as_bad (_("invalid or unsupported encoding in .cfi_lsda"));
916 ignore_rest_of_line ();
920 if (*input_line_pointer++ != ',')
922 as_bad (_(".cfi_lsda requires encoding and symbol arguments"));
923 ignore_rest_of_line ();
927 fde->lsda_encoding = encoding;
929 expression_and_evaluate (&fde->lsda);
930 switch (fde->lsda.X_op)
935 if ((encoding & 0x70) == DW_EH_PE_pcrel)
936 encoding = DW_EH_PE_omit;
939 encoding = DW_EH_PE_omit;
943 fde->lsda_encoding = encoding;
945 if (encoding == DW_EH_PE_omit)
947 as_bad (_("wrong second argument to .cfi_lsda"));
948 ignore_rest_of_line ();
952 demand_empty_rest_of_line ();
956 dot_cfi_val_encoded_addr (int ignored ATTRIBUTE_UNUSED)
958 struct cfi_insn_data *insn_ptr;
961 if (frchain_now->frch_cfi_data == NULL)
963 as_bad (_("CFI instruction used without previous .cfi_startproc"));
964 ignore_rest_of_line ();
968 /* If the last address was not at the current PC, advance to current. */
969 if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now
970 || S_GET_VALUE (frchain_now->frch_cfi_data->last_address)
972 cfi_add_advance_loc (symbol_temp_new_now ());
974 insn_ptr = alloc_cfi_insn_data ();
975 insn_ptr->insn = CFI_val_encoded_addr;
977 insn_ptr->u.ea.reg = cfi_parse_reg ();
979 cfi_parse_separator ();
980 encoding = cfi_parse_const ();
981 if ((encoding & 0xff) != encoding
982 || ((encoding & 0x70) != 0
983 #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
984 && (encoding & 0x70) != DW_EH_PE_pcrel
987 /* leb128 can be handled, but does something actually need it? */
988 || (encoding & 7) == DW_EH_PE_uleb128
989 || (encoding & 7) > DW_EH_PE_udata8)
991 as_bad (_("invalid or unsupported encoding in .cfi_lsda"));
992 encoding = DW_EH_PE_omit;
995 cfi_parse_separator ();
996 expression_and_evaluate (&insn_ptr->u.ea.exp);
997 switch (insn_ptr->u.ea.exp.X_op)
1002 if ((encoding & 0x70) != DW_EH_PE_pcrel)
1005 encoding = DW_EH_PE_omit;
1009 insn_ptr->u.ea.encoding = encoding;
1010 if (encoding == DW_EH_PE_omit)
1012 as_bad (_("wrong third argument to .cfi_val_encoded_addr"));
1013 ignore_rest_of_line ();
1017 demand_empty_rest_of_line ();
1020 /* By default emit .eh_frame only, not .debug_frame. */
1021 #define CFI_EMIT_eh_frame (1 << 0)
1022 #define CFI_EMIT_debug_frame (1 << 1)
1023 #define CFI_EMIT_target (1 << 2)
1024 static int cfi_sections = CFI_EMIT_eh_frame;
1027 dot_cfi_sections (int ignored ATTRIBUTE_UNUSED)
1032 if (is_name_beginner (*input_line_pointer))
1037 name = input_line_pointer;
1038 c = get_symbol_end ();
1040 if (strncmp (name, ".eh_frame", sizeof ".eh_frame") == 0
1042 sections |= CFI_EMIT_eh_frame;
1043 else if (strncmp (name, ".debug_frame", sizeof ".debug_frame") == 0)
1044 sections |= CFI_EMIT_debug_frame;
1045 #ifdef tc_cfi_section_name
1046 else if (strcmp (name, tc_cfi_section_name) == 0)
1047 sections |= CFI_EMIT_target;
1051 *input_line_pointer = c;
1052 input_line_pointer = name;
1056 *input_line_pointer = c;
1058 if (*input_line_pointer == ',')
1060 name = input_line_pointer++;
1062 if (!is_name_beginner (*input_line_pointer))
1064 input_line_pointer = name;
1068 else if (is_name_beginner (*input_line_pointer))
1072 demand_empty_rest_of_line ();
1073 cfi_sections = sections;
1077 dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED)
1081 if (frchain_now->frch_cfi_data != NULL)
1083 as_bad (_("previous CFI entry not closed (missing .cfi_endproc)"));
1084 ignore_rest_of_line ();
1088 cfi_new_fde (symbol_temp_new_now ());
1091 if (is_name_beginner (*input_line_pointer))
1095 name = input_line_pointer;
1096 c = get_symbol_end ();
1098 if (strcmp (name, "simple") == 0)
1101 *input_line_pointer = c;
1104 input_line_pointer = name;
1106 demand_empty_rest_of_line ();
1108 frchain_now->frch_cfi_data->cur_cfa_offset = 0;
1110 tc_cfi_frame_initial_instructions ();
1112 if ((cfi_sections & CFI_EMIT_target) != 0)
1113 tc_cfi_startproc ();
1117 dot_cfi_endproc (int ignored ATTRIBUTE_UNUSED)
1119 struct fde_entry *fde;
1121 if (frchain_now->frch_cfi_data == NULL)
1123 as_bad (_(".cfi_endproc without corresponding .cfi_startproc"));
1124 ignore_rest_of_line ();
1128 fde = frchain_now->frch_cfi_data->cur_fde_data;
1130 cfi_end_fde (symbol_temp_new_now ());
1132 demand_empty_rest_of_line ();
1134 if ((cfi_sections & CFI_EMIT_target) != 0)
1135 tc_cfi_endproc (fde);
1139 /* Emit a single byte into the current segment. */
1144 FRAG_APPEND_1_CHAR (byte);
1147 /* Emit a two-byte word into the current segment. */
1152 md_number_to_chars (frag_more (2), data, 2);
1155 /* Emit a four byte word into the current segment. */
1160 md_number_to_chars (frag_more (4), data, 4);
1163 /* Emit an unsigned "little-endian base 128" number. */
1166 out_uleb128 (addressT value)
1168 output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0);
1171 /* Emit an unsigned "little-endian base 128" number. */
1174 out_sleb128 (offsetT value)
1176 output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1);
1180 output_cfi_insn (struct cfi_insn_data *insn)
1187 case DW_CFA_advance_loc:
1189 symbolS *from = insn->u.ll.lab1;
1190 symbolS *to = insn->u.ll.lab2;
1192 if (symbol_get_frag (to) == symbol_get_frag (from))
1194 addressT delta = S_GET_VALUE (to) - S_GET_VALUE (from);
1195 addressT scaled = delta / DWARF2_LINE_MIN_INSN_LENGTH;
1198 out_one (DW_CFA_advance_loc + scaled);
1199 else if (scaled <= 0xFF)
1201 out_one (DW_CFA_advance_loc1);
1204 else if (scaled <= 0xFFFF)
1206 out_one (DW_CFA_advance_loc2);
1211 out_one (DW_CFA_advance_loc4);
1219 exp.X_op = O_subtract;
1220 exp.X_add_symbol = to;
1221 exp.X_op_symbol = from;
1222 exp.X_add_number = 0;
1224 /* The code in ehopt.c expects that one byte of the encoding
1225 is already allocated to the frag. This comes from the way
1226 that it scans the .eh_frame section looking first for the
1227 .byte DW_CFA_advance_loc4. */
1228 *frag_more (1) = DW_CFA_advance_loc4;
1230 frag_var (rs_cfa, 4, 0, DWARF2_LINE_MIN_INSN_LENGTH << 3,
1231 make_expr_symbol (&exp), frag_now_fix () - 1,
1237 case DW_CFA_def_cfa:
1238 offset = insn->u.ri.offset;
1241 out_one (DW_CFA_def_cfa_sf);
1242 out_uleb128 (insn->u.ri.reg);
1243 out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT);
1247 out_one (DW_CFA_def_cfa);
1248 out_uleb128 (insn->u.ri.reg);
1249 out_uleb128 (offset);
1253 case DW_CFA_def_cfa_register:
1254 case DW_CFA_undefined:
1255 case DW_CFA_same_value:
1256 out_one (insn->insn);
1257 out_uleb128 (insn->u.r);
1260 case DW_CFA_def_cfa_offset:
1264 out_one (DW_CFA_def_cfa_offset_sf);
1265 out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT);
1269 out_one (DW_CFA_def_cfa_offset);
1270 out_uleb128 (offset);
1274 case DW_CFA_restore:
1278 out_one (DW_CFA_restore + regno);
1282 out_one (DW_CFA_restore_extended);
1283 out_uleb128 (regno);
1288 regno = insn->u.ri.reg;
1289 offset = insn->u.ri.offset / DWARF2_CIE_DATA_ALIGNMENT;
1292 out_one (DW_CFA_offset_extended_sf);
1293 out_uleb128 (regno);
1294 out_sleb128 (offset);
1296 else if (regno <= 0x3F)
1298 out_one (DW_CFA_offset + regno);
1299 out_uleb128 (offset);
1303 out_one (DW_CFA_offset_extended);
1304 out_uleb128 (regno);
1305 out_uleb128 (offset);
1309 case DW_CFA_register:
1310 out_one (DW_CFA_register);
1311 out_uleb128 (insn->u.rr.reg1);
1312 out_uleb128 (insn->u.rr.reg2);
1315 case DW_CFA_remember_state:
1316 case DW_CFA_restore_state:
1317 out_one (insn->insn);
1320 case DW_CFA_GNU_window_save:
1321 out_one (DW_CFA_GNU_window_save);
1326 struct cfi_escape_data *e;
1327 for (e = insn->u.esc; e ; e = e->next)
1328 emit_expr (&e->exp, 1);
1332 case CFI_val_encoded_addr:
1334 unsigned encoding = insn->u.ea.encoding;
1335 offsetT encoding_size;
1337 if (encoding == DW_EH_PE_omit)
1339 out_one (DW_CFA_val_expression);
1340 out_uleb128 (insn->u.ea.reg);
1342 switch (encoding & 0x7)
1344 case DW_EH_PE_absptr:
1345 encoding_size = DWARF2_ADDR_SIZE (stdoutput);
1347 case DW_EH_PE_udata2:
1350 case DW_EH_PE_udata4:
1353 case DW_EH_PE_udata8:
1360 /* If the user has requested absolute encoding,
1361 then use the smaller DW_OP_addr encoding. */
1362 if (insn->u.ea.encoding == DW_EH_PE_absptr)
1364 out_uleb128 (1 + encoding_size);
1365 out_one (DW_OP_addr);
1369 out_uleb128 (1 + 1 + encoding_size);
1370 out_one (DW_OP_GNU_encoded_addr);
1373 if ((encoding & 0x70) == DW_EH_PE_pcrel)
1375 #if CFI_DIFF_EXPR_OK
1376 insn->u.ea.exp.X_op = O_subtract;
1377 insn->u.ea.exp.X_op_symbol = symbol_temp_new_now ();
1378 #elif defined (tc_cfi_emit_pcrel_expr)
1379 tc_cfi_emit_pcrel_expr (&insn->u.ea.exp, encoding_size);
1386 emit_expr (&insn->u.ea.exp, encoding_size);
1396 encoding_size (unsigned char encoding)
1398 if (encoding == DW_EH_PE_omit)
1400 switch (encoding & 0x7)
1403 return bfd_get_arch_size (stdoutput) == 64 ? 8 : 4;
1404 case DW_EH_PE_udata2:
1406 case DW_EH_PE_udata4:
1408 case DW_EH_PE_udata8:
1416 output_cie (struct cie_entry *cie, bfd_boolean eh_frame, int align)
1418 symbolS *after_size_address, *end_address;
1420 struct cfi_insn_data *i;
1421 offsetT augmentation_size;
1423 enum dwarf2_format fmt = DWARF2_FORMAT (now_seg);
1425 cie->start_address = symbol_temp_new_now ();
1426 after_size_address = symbol_temp_make ();
1427 end_address = symbol_temp_make ();
1429 exp.X_op = O_subtract;
1430 exp.X_add_symbol = end_address;
1431 exp.X_op_symbol = after_size_address;
1432 exp.X_add_number = 0;
1434 if (eh_frame || fmt == dwarf2_format_32bit)
1435 emit_expr (&exp, 4); /* Length. */
1438 if (fmt == dwarf2_format_64bit)
1440 emit_expr (&exp, 8); /* Length. */
1442 symbol_set_value_now (after_size_address);
1444 out_four (0); /* CIE id. */
1447 out_four (-1); /* CIE id. */
1448 if (fmt != dwarf2_format_32bit)
1451 out_one (DW_CIE_VERSION); /* Version. */
1454 out_one ('z'); /* Augmentation. */
1455 if (cie->per_encoding != DW_EH_PE_omit)
1457 if (cie->lsda_encoding != DW_EH_PE_omit)
1461 if (cie->signal_frame)
1464 out_uleb128 (DWARF2_LINE_MIN_INSN_LENGTH); /* Code alignment. */
1465 out_sleb128 (DWARF2_CIE_DATA_ALIGNMENT); /* Data alignment. */
1466 if (DW_CIE_VERSION == 1) /* Return column. */
1467 out_one (cie->return_column);
1469 out_uleb128 (cie->return_column);
1472 augmentation_size = 1 + (cie->lsda_encoding != DW_EH_PE_omit);
1473 if (cie->per_encoding != DW_EH_PE_omit)
1474 augmentation_size += 1 + encoding_size (cie->per_encoding);
1475 out_uleb128 (augmentation_size); /* Augmentation size. */
1477 if (cie->per_encoding != DW_EH_PE_omit)
1479 offsetT size = encoding_size (cie->per_encoding);
1480 out_one (cie->per_encoding);
1481 exp = cie->personality;
1482 if ((cie->per_encoding & 0x70) == DW_EH_PE_pcrel)
1484 #if CFI_DIFF_EXPR_OK
1485 exp.X_op = O_subtract;
1486 exp.X_op_symbol = symbol_temp_new_now ();
1487 emit_expr (&exp, size);
1488 #elif defined (tc_cfi_emit_pcrel_expr)
1489 tc_cfi_emit_pcrel_expr (&exp, size);
1495 emit_expr (&exp, size);
1498 if (cie->lsda_encoding != DW_EH_PE_omit)
1499 out_one (cie->lsda_encoding);
1502 switch (DWARF2_FDE_RELOC_SIZE)
1505 enc = DW_EH_PE_sdata2;
1508 enc = DW_EH_PE_sdata4;
1511 enc = DW_EH_PE_sdata8;
1516 #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
1517 enc |= DW_EH_PE_pcrel;
1524 for (i = cie->first; i != cie->last; i = i->next)
1526 if (CUR_SEG (i) != CUR_SEG (cie))
1528 output_cfi_insn (i);
1532 frag_align (align, DW_CFA_nop, 0);
1533 symbol_set_value_now (end_address);
1537 output_fde (struct fde_entry *fde, struct cie_entry *cie,
1538 bfd_boolean eh_frame, struct cfi_insn_data *first,
1541 symbolS *after_size_address, *end_address;
1543 offsetT augmentation_size;
1544 enum dwarf2_format fmt = DWARF2_FORMAT (now_seg);
1548 after_size_address = symbol_temp_make ();
1549 end_address = symbol_temp_make ();
1551 exp.X_op = O_subtract;
1552 exp.X_add_symbol = end_address;
1553 exp.X_op_symbol = after_size_address;
1554 exp.X_add_number = 0;
1555 if (eh_frame || fmt == dwarf2_format_32bit)
1559 if (fmt == dwarf2_format_64bit)
1563 emit_expr (&exp, offset_size); /* Length. */
1564 symbol_set_value_now (after_size_address);
1568 exp.X_op = O_subtract;
1569 exp.X_add_symbol = after_size_address;
1570 exp.X_op_symbol = cie->start_address;
1571 exp.X_add_number = 0;
1572 emit_expr (&exp, offset_size); /* CIE offset. */
1576 TC_DWARF2_EMIT_OFFSET (cie->start_address, offset_size);
1581 exp.X_op = O_subtract;
1582 exp.X_add_number = 0;
1583 #if CFI_DIFF_EXPR_OK
1584 exp.X_add_symbol = fde->start_address;
1585 exp.X_op_symbol = symbol_temp_new_now ();
1586 emit_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */
1588 exp.X_op = O_symbol;
1589 exp.X_add_symbol = fde->start_address;
1590 #ifdef tc_cfi_emit_pcrel_expr
1591 tc_cfi_emit_pcrel_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */
1593 emit_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */
1596 addr_size = DWARF2_FDE_RELOC_SIZE;
1600 exp.X_op = O_symbol;
1601 exp.X_add_symbol = fde->start_address;
1602 exp.X_add_number = 0;
1603 addr_size = DWARF2_ADDR_SIZE (stdoutput);
1604 emit_expr (&exp, addr_size);
1607 exp.X_op = O_subtract;
1608 exp.X_add_symbol = fde->end_address;
1609 exp.X_op_symbol = fde->start_address; /* Code length. */
1610 exp.X_add_number = 0;
1611 emit_expr (&exp, addr_size);
1613 augmentation_size = encoding_size (fde->lsda_encoding);
1615 out_uleb128 (augmentation_size); /* Augmentation size. */
1617 if (fde->lsda_encoding != DW_EH_PE_omit)
1620 if ((fde->lsda_encoding & 0x70) == DW_EH_PE_pcrel)
1622 #if CFI_DIFF_LSDA_OK
1623 exp.X_op = O_subtract;
1624 exp.X_op_symbol = symbol_temp_new_now ();
1625 emit_expr (&exp, augmentation_size);
1626 #elif defined (tc_cfi_emit_pcrel_expr)
1627 tc_cfi_emit_pcrel_expr (&exp, augmentation_size);
1633 emit_expr (&exp, augmentation_size);
1636 for (; first; first = first->next)
1637 if (CUR_SEG (first) == CUR_SEG (fde))
1638 output_cfi_insn (first);
1640 frag_align (align, DW_CFA_nop, 0);
1641 symbol_set_value_now (end_address);
1644 static struct cie_entry *
1645 select_cie_for_fde (struct fde_entry *fde, bfd_boolean eh_frame,
1646 struct cfi_insn_data **pfirst, int align)
1648 struct cfi_insn_data *i, *j;
1649 struct cie_entry *cie;
1651 for (cie = cie_root; cie; cie = cie->next)
1653 if (CUR_SEG (cie) != CUR_SEG (fde))
1655 if (cie->return_column != fde->return_column
1656 || cie->signal_frame != fde->signal_frame
1657 || cie->per_encoding != fde->per_encoding
1658 || cie->lsda_encoding != fde->lsda_encoding)
1660 if (cie->per_encoding != DW_EH_PE_omit)
1662 if (cie->personality.X_op != fde->personality.X_op
1663 || cie->personality.X_add_number
1664 != fde->personality.X_add_number)
1666 switch (cie->personality.X_op)
1669 if (cie->personality.X_unsigned != fde->personality.X_unsigned)
1673 if (cie->personality.X_add_symbol
1674 != fde->personality.X_add_symbol)
1681 for (i = cie->first, j = fde->data;
1682 i != cie->last && j != NULL;
1683 i = i->next, j = j->next)
1685 if (i->insn != j->insn)
1689 case DW_CFA_advance_loc:
1690 case DW_CFA_remember_state:
1691 /* We reached the first advance/remember in the FDE,
1692 but did not reach the end of the CIE list. */
1696 case DW_CFA_def_cfa:
1697 if (i->u.ri.reg != j->u.ri.reg)
1699 if (i->u.ri.offset != j->u.ri.offset)
1703 case DW_CFA_register:
1704 if (i->u.rr.reg1 != j->u.rr.reg1)
1706 if (i->u.rr.reg2 != j->u.rr.reg2)
1710 case DW_CFA_def_cfa_register:
1711 case DW_CFA_restore:
1712 case DW_CFA_undefined:
1713 case DW_CFA_same_value:
1714 if (i->u.r != j->u.r)
1718 case DW_CFA_def_cfa_offset:
1719 if (i->u.i != j->u.i)
1724 case CFI_val_encoded_addr:
1725 /* Don't bother matching these for now. */
1733 /* Success if we reached the end of the CIE list, and we've either
1734 run out of FDE entries or we've encountered an advance,
1735 remember, or escape. */
1738 || j->insn == DW_CFA_advance_loc
1739 || j->insn == DW_CFA_remember_state
1740 || j->insn == CFI_escape
1741 || j->insn == CFI_val_encoded_addr))
1750 cie = (struct cie_entry *) xmalloc (sizeof (struct cie_entry));
1751 cie->next = cie_root;
1753 SET_CUR_SEG (cie, CUR_SEG (fde));
1754 cie->return_column = fde->return_column;
1755 cie->signal_frame = fde->signal_frame;
1756 cie->per_encoding = fde->per_encoding;
1757 cie->lsda_encoding = fde->lsda_encoding;
1758 cie->personality = fde->personality;
1759 cie->first = fde->data;
1761 for (i = cie->first; i ; i = i->next)
1762 if (i->insn == DW_CFA_advance_loc
1763 || i->insn == DW_CFA_remember_state
1764 || i->insn == CFI_escape
1765 || i->insn == CFI_val_encoded_addr)
1771 output_cie (cie, eh_frame, align);
1776 #ifdef md_reg_eh_frame_to_debug_frame
1778 cfi_change_reg_numbers (struct cfi_insn_data *insn, segT ccseg)
1780 for (; insn; insn = insn->next)
1782 if (CUR_SEG (insn) != ccseg)
1786 case DW_CFA_advance_loc:
1787 case DW_CFA_def_cfa_offset:
1788 case DW_CFA_remember_state:
1789 case DW_CFA_restore_state:
1790 case DW_CFA_GNU_window_save:
1794 case DW_CFA_def_cfa:
1796 insn->u.ri.reg = md_reg_eh_frame_to_debug_frame (insn->u.ri.reg);
1799 case DW_CFA_def_cfa_register:
1800 case DW_CFA_undefined:
1801 case DW_CFA_same_value:
1802 case DW_CFA_restore:
1803 insn->u.r = md_reg_eh_frame_to_debug_frame (insn->u.r);
1806 case DW_CFA_register:
1807 insn->u.rr.reg1 = md_reg_eh_frame_to_debug_frame (insn->u.rr.reg1);
1808 insn->u.rr.reg2 = md_reg_eh_frame_to_debug_frame (insn->u.rr.reg2);
1811 case CFI_val_encoded_addr:
1812 insn->u.ea.reg = md_reg_eh_frame_to_debug_frame (insn->u.ea.reg);
1821 #define cfi_change_reg_numbers(insn, cseg) do { } while (0)
1825 get_cfi_seg (segT cseg, const char *base, flagword flags, int align)
1827 if (SUPPORT_FRAME_LINKONCE)
1829 struct dwcfi_seg_list *l;
1831 l = dwcfi_hash_find_or_make (cseg, base, flags);
1834 subseg_set (cseg, l->subseg);
1838 cseg = subseg_new (base, 0);
1839 bfd_set_section_flags (stdoutput, cseg, flags);
1841 record_alignment (cseg, align);
1848 struct cie_entry *cie, *cie_next;
1849 segT cfi_seg, ccseg;
1850 struct fde_entry *fde;
1851 struct cfi_insn_data *first;
1852 int save_flag_traditional_format, seek_next_seg;
1854 if (all_fde_data == 0)
1857 if ((cfi_sections & CFI_EMIT_eh_frame) != 0)
1859 /* Make sure check_eh_frame doesn't do anything with our output. */
1860 save_flag_traditional_format = flag_traditional_format;
1861 flag_traditional_format = 1;
1863 if (!SUPPORT_FRAME_LINKONCE)
1865 /* Open .eh_frame section. */
1866 cfi_seg = get_cfi_seg (NULL, ".eh_frame",
1867 (SEC_ALLOC | SEC_LOAD | SEC_DATA
1868 | DWARF2_EH_FRAME_READ_ONLY),
1869 EH_FRAME_ALIGNMENT);
1870 #ifdef md_fix_up_eh_frame
1871 md_fix_up_eh_frame (cfi_seg);
1882 for (cie = cie_root; cie; cie = cie_next)
1884 cie_next = cie->next;
1885 free ((void *) cie);
1889 for (fde = all_fde_data; fde ; fde = fde->next)
1891 if (SUPPORT_FRAME_LINKONCE)
1895 if (seek_next_seg && CUR_SEG (fde) != ccseg)
1902 ccseg = CUR_SEG (fde);
1903 /* Open .eh_frame section. */
1904 cfi_seg = get_cfi_seg (ccseg, ".eh_frame",
1905 (SEC_ALLOC | SEC_LOAD | SEC_DATA
1906 | DWARF2_EH_FRAME_READ_ONLY),
1907 EH_FRAME_ALIGNMENT);
1908 #ifdef md_fix_up_eh_frame
1909 md_fix_up_eh_frame (cfi_seg);
1915 SET_HANDLED (fde, 1);
1918 if (fde->end_address == NULL)
1920 as_bad (_("open CFI at the end of file; missing .cfi_endproc directive"));
1921 fde->end_address = fde->start_address;
1924 cie = select_cie_for_fde (fde, TRUE, &first, 2);
1925 output_fde (fde, cie, TRUE, first,
1926 fde->next == NULL ? EH_FRAME_ALIGNMENT : 2);
1929 while (SUPPORT_FRAME_LINKONCE && seek_next_seg == 2);
1931 if (SUPPORT_FRAME_LINKONCE)
1932 for (fde = all_fde_data; fde ; fde = fde->next)
1933 SET_HANDLED (fde, 0);
1935 flag_traditional_format = save_flag_traditional_format;
1938 if ((cfi_sections & CFI_EMIT_debug_frame) != 0)
1940 int alignment = ffs (DWARF2_ADDR_SIZE (stdoutput)) - 1;
1942 if (!SUPPORT_FRAME_LINKONCE)
1943 get_cfi_seg (NULL, ".debug_frame",
1944 SEC_READONLY | SEC_DEBUGGING,
1952 for (cie = cie_root; cie; cie = cie_next)
1954 cie_next = cie->next;
1955 free ((void *) cie);
1959 for (fde = all_fde_data; fde ; fde = fde->next)
1961 if (SUPPORT_FRAME_LINKONCE)
1965 if (seek_next_seg && CUR_SEG (fde) != ccseg)
1972 ccseg = CUR_SEG (fde);
1973 /* Open .debug_frame section. */
1974 get_cfi_seg (ccseg, ".debug_frame",
1975 SEC_READONLY | SEC_DEBUGGING,
1979 SET_HANDLED (fde, 1);
1981 if (fde->end_address == NULL)
1983 as_bad (_("open CFI at the end of file; missing .cfi_endproc directive"));
1984 fde->end_address = fde->start_address;
1987 fde->per_encoding = DW_EH_PE_omit;
1988 fde->lsda_encoding = DW_EH_PE_omit;
1989 cfi_change_reg_numbers (fde->data, ccseg);
1990 cie = select_cie_for_fde (fde, FALSE, &first, alignment);
1991 output_fde (fde, cie, FALSE, first, alignment);
1994 while (SUPPORT_FRAME_LINKONCE && seek_next_seg == 2);
1996 if (SUPPORT_FRAME_LINKONCE)
1997 for (fde = all_fde_data; fde ; fde = fde->next)
1998 SET_HANDLED (fde, 0);
2002 #else /* TARGET_USE_CFIPOP */
2004 /* Emit an intelligible error message for missing support. */
2007 dot_cfi_dummy (int ignored ATTRIBUTE_UNUSED)
2009 as_bad (_("CFI is not supported for this target"));
2010 ignore_rest_of_line ();
2013 const pseudo_typeS cfi_pseudo_table[] =
2015 { "cfi_sections", dot_cfi_dummy, 0 },
2016 { "cfi_startproc", dot_cfi_dummy, 0 },
2017 { "cfi_endproc", dot_cfi_dummy, 0 },
2018 { "cfi_def_cfa", dot_cfi_dummy, 0 },
2019 { "cfi_def_cfa_register", dot_cfi_dummy, 0 },
2020 { "cfi_def_cfa_offset", dot_cfi_dummy, 0 },
2021 { "cfi_adjust_cfa_offset", dot_cfi_dummy, 0 },
2022 { "cfi_offset", dot_cfi_dummy, 0 },
2023 { "cfi_rel_offset", dot_cfi_dummy, 0 },
2024 { "cfi_register", dot_cfi_dummy, 0 },
2025 { "cfi_return_column", dot_cfi_dummy, 0 },
2026 { "cfi_restore", dot_cfi_dummy, 0 },
2027 { "cfi_undefined", dot_cfi_dummy, 0 },
2028 { "cfi_same_value", dot_cfi_dummy, 0 },
2029 { "cfi_remember_state", dot_cfi_dummy, 0 },
2030 { "cfi_restore_state", dot_cfi_dummy, 0 },
2031 { "cfi_window_save", dot_cfi_dummy, 0 },
2032 { "cfi_escape", dot_cfi_dummy, 0 },
2033 { "cfi_signal_frame", dot_cfi_dummy, 0 },
2034 { "cfi_personality", dot_cfi_dummy, 0 },
2035 { "cfi_lsda", dot_cfi_dummy, 0 },
2036 { "cfi_val_encoded_addr", dot_cfi_dummy, 0 },
2044 #endif /* TARGET_USE_CFIPOP */