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)
72 #define DWARF2_FORMAT(SEC) dwarf2_format_32bit
75 #ifndef DWARF2_ADDR_SIZE
76 #define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8)
79 #if defined (TE_PE) || defined (TE_PEP)
80 #define SUPPORT_FRAME_LINKONCE 1
82 #define SUPPORT_FRAME_LINKONCE 0
85 #if SUPPORT_FRAME_LINKONCE
86 #define CUR_SEG(structp) structp->cur_seg
87 #define SET_CUR_SEG(structp, seg) structp->cur_seg = seg
88 #define HANDLED(structp) structp->handled
89 #define SET_HANDLED(structp, val) structp->handled = val
91 #define CUR_SEG(structp) NULL
92 #define SET_CUR_SEG(structp, seg) (void) (0 && seg)
93 #define HANDLED(structp) 0
94 #define SET_HANDLED(structp, val) (void) (0 && val)
97 /* Private segment collection list. */
105 #define FRAME_NAME ".eh_frame"
107 static struct hash_control
*dwcfi_hash
;
109 /* Build based on segment the derived .debug_...
110 segment name containing origin segment's postfix name part. */
113 get_debugseg_name (segT seg
, const char *base_name
)
124 name
= bfd_get_section_name (stdoutput
, seg
);
126 dollar
= strchr (name
, '$');
127 dot
= strchr (name
+ 1, '.');
135 else if (dot
< dollar
)
141 return concat (base_name
, name
, NULL
);
144 /* Allocate a dwcfi_seg_list structure. */
146 static struct dwcfi_seg_list
*
147 alloc_debugseg_item (segT seg
, int subseg
, char *name
)
149 struct dwcfi_seg_list
*r
;
151 r
= (struct dwcfi_seg_list
*)
152 xmalloc (sizeof (struct dwcfi_seg_list
) + strlen (name
));
160 is_now_linkonce_segment (void)
162 if ((bfd_get_section_flags (stdoutput
, now_seg
)
163 & (SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
164 | SEC_LINK_DUPLICATES_ONE_ONLY
| SEC_LINK_DUPLICATES_SAME_SIZE
165 | SEC_LINK_DUPLICATES_SAME_CONTENTS
)) != 0)
170 /* Generate debug... segment with same linkonce properties
174 make_debug_seg (segT cseg
, char *name
, int sflags
)
176 segT save_seg
= now_seg
;
177 int save_subseg
= now_subseg
;
181 r
= subseg_new (name
, 0);
183 /* Check if code segment is marked as linked once. */
187 flags
= bfd_get_section_flags (stdoutput
, cseg
)
188 & (SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
189 | SEC_LINK_DUPLICATES_ONE_ONLY
| SEC_LINK_DUPLICATES_SAME_SIZE
190 | SEC_LINK_DUPLICATES_SAME_CONTENTS
);
192 /* Add standard section flags. */
195 /* Apply possibly linked once flags to new generated segment, too. */
196 if (!bfd_set_section_flags (stdoutput
, r
, flags
))
197 as_bad (_("bfd_set_section_flags: %s"),
198 bfd_errmsg (bfd_get_error ()));
200 /* Restore to previous segment. */
201 if (save_seg
!= NULL
)
202 subseg_set (save_seg
, save_subseg
);
207 dwcfi_hash_insert (const char *name
, struct dwcfi_seg_list
*item
)
209 const char *error_string
;
211 if ((error_string
= hash_jam (dwcfi_hash
, name
, (char *) item
)))
212 as_fatal (_("Inserting \"%s\" into structure table failed: %s"),
216 static struct dwcfi_seg_list
*
217 dwcfi_hash_find (char *name
)
219 return (struct dwcfi_seg_list
*) hash_find (dwcfi_hash
, name
);
222 static struct dwcfi_seg_list
*
223 dwcfi_hash_find_or_make (segT cseg
, const char *base_name
, int flags
)
225 struct dwcfi_seg_list
*item
;
228 /* Initialize dwcfi_hash once. */
230 dwcfi_hash
= hash_new ();
232 name
= get_debugseg_name (cseg
, base_name
);
234 item
= dwcfi_hash_find (name
);
237 item
= alloc_debugseg_item (make_debug_seg (cseg
, name
, flags
), 0, name
);
239 dwcfi_hash_insert (item
->seg_name
, item
);
247 /* ??? Share this with dwarf2cfg.c. */
248 #ifndef TC_DWARF2_EMIT_OFFSET
249 #define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset
251 /* Create an offset to .dwarf2_*. */
254 generic_dwarf2_emit_offset (symbolS
*symbol
, unsigned int size
)
259 exp
.X_add_symbol
= symbol
;
260 exp
.X_add_number
= 0;
261 emit_expr (&exp
, size
);
265 struct cfi_escape_data
267 struct cfi_escape_data
*next
;
273 struct cfi_insn_data
*next
;
274 #if SUPPORT_FRAME_LINKONCE
301 struct cfi_escape_data
*esc
;
305 unsigned reg
, encoding
;
313 struct fde_entry
*next
;
314 #if SUPPORT_FRAME_LINKONCE
317 symbolS
*start_address
;
318 symbolS
*end_address
;
319 struct cfi_insn_data
*data
;
320 struct cfi_insn_data
**last
;
321 unsigned char per_encoding
;
322 unsigned char lsda_encoding
;
323 expressionS personality
;
325 unsigned int return_column
;
326 unsigned int signal_frame
;
327 #if SUPPORT_FRAME_LINKONCE
334 struct cie_entry
*next
;
335 #if SUPPORT_FRAME_LINKONCE
338 symbolS
*start_address
;
339 unsigned int return_column
;
340 unsigned int signal_frame
;
341 unsigned char per_encoding
;
342 unsigned char lsda_encoding
;
343 expressionS personality
;
344 struct cfi_insn_data
*first
, *last
;
347 /* List of FDE entries. */
349 static struct fde_entry
*all_fde_data
;
350 static struct fde_entry
**last_fde_data
= &all_fde_data
;
352 /* List of CIEs so that they could be reused. */
353 static struct cie_entry
*cie_root
;
355 /* Stack of old CFI data, for save/restore. */
358 struct cfa_save_data
*next
;
362 /* Current open FDE entry. */
365 struct fde_entry
*cur_fde_data
;
366 symbolS
*last_address
;
367 offsetT cur_cfa_offset
;
368 struct cfa_save_data
*cfa_save_stack
;
371 /* Construct a new FDE structure and add it to the end of the fde list. */
373 static struct fde_entry
*
374 alloc_fde_entry (void)
376 struct fde_entry
*fde
= (struct fde_entry
*)
377 xcalloc (1, sizeof (struct fde_entry
));
379 frchain_now
->frch_cfi_data
= (struct frch_cfi_data
*)
380 xcalloc (1, sizeof (struct frch_cfi_data
));
381 frchain_now
->frch_cfi_data
->cur_fde_data
= fde
;
382 *last_fde_data
= fde
;
383 last_fde_data
= &fde
->next
;
384 SET_CUR_SEG (fde
, is_now_linkonce_segment ());
385 SET_HANDLED (fde
, 0);
386 fde
->last
= &fde
->data
;
387 fde
->return_column
= DWARF2_DEFAULT_RETURN_COLUMN
;
388 fde
->per_encoding
= DW_EH_PE_omit
;
389 fde
->lsda_encoding
= DW_EH_PE_omit
;
394 /* The following functions are available for a backend to construct its
395 own unwind information, usually from legacy unwind directives. */
397 /* Construct a new INSN structure and add it to the end of the insn list
398 for the currently active FDE. */
400 static struct cfi_insn_data
*
401 alloc_cfi_insn_data (void)
403 struct cfi_insn_data
*insn
= (struct cfi_insn_data
*)
404 xcalloc (1, sizeof (struct cfi_insn_data
));
405 struct fde_entry
*cur_fde_data
= frchain_now
->frch_cfi_data
->cur_fde_data
;
407 *cur_fde_data
->last
= insn
;
408 cur_fde_data
->last
= &insn
->next
;
409 SET_CUR_SEG (insn
, is_now_linkonce_segment ());
413 /* Construct a new FDE structure that begins at LABEL. */
416 cfi_new_fde (symbolS
*label
)
418 struct fde_entry
*fde
= alloc_fde_entry ();
419 fde
->start_address
= label
;
420 frchain_now
->frch_cfi_data
->last_address
= label
;
423 /* End the currently open FDE. */
426 cfi_end_fde (symbolS
*label
)
428 frchain_now
->frch_cfi_data
->cur_fde_data
->end_address
= label
;
429 free (frchain_now
->frch_cfi_data
);
430 frchain_now
->frch_cfi_data
= NULL
;
433 /* Set the return column for the current FDE. */
436 cfi_set_return_column (unsigned regno
)
438 frchain_now
->frch_cfi_data
->cur_fde_data
->return_column
= regno
;
441 /* Universal functions to store new instructions. */
444 cfi_add_CFA_insn (int insn
)
446 struct cfi_insn_data
*insn_ptr
= alloc_cfi_insn_data ();
448 insn_ptr
->insn
= insn
;
452 cfi_add_CFA_insn_reg (int insn
, unsigned regno
)
454 struct cfi_insn_data
*insn_ptr
= alloc_cfi_insn_data ();
456 insn_ptr
->insn
= insn
;
457 insn_ptr
->u
.r
= regno
;
461 cfi_add_CFA_insn_offset (int insn
, offsetT offset
)
463 struct cfi_insn_data
*insn_ptr
= alloc_cfi_insn_data ();
465 insn_ptr
->insn
= insn
;
466 insn_ptr
->u
.i
= offset
;
470 cfi_add_CFA_insn_reg_reg (int insn
, unsigned reg1
, unsigned reg2
)
472 struct cfi_insn_data
*insn_ptr
= alloc_cfi_insn_data ();
474 insn_ptr
->insn
= insn
;
475 insn_ptr
->u
.rr
.reg1
= reg1
;
476 insn_ptr
->u
.rr
.reg2
= reg2
;
480 cfi_add_CFA_insn_reg_offset (int insn
, unsigned regno
, offsetT offset
)
482 struct cfi_insn_data
*insn_ptr
= alloc_cfi_insn_data ();
484 insn_ptr
->insn
= insn
;
485 insn_ptr
->u
.ri
.reg
= regno
;
486 insn_ptr
->u
.ri
.offset
= offset
;
489 /* Add a CFI insn to advance the PC from the last address to LABEL. */
492 cfi_add_advance_loc (symbolS
*label
)
494 struct cfi_insn_data
*insn
= alloc_cfi_insn_data ();
496 insn
->insn
= DW_CFA_advance_loc
;
497 insn
->u
.ll
.lab1
= frchain_now
->frch_cfi_data
->last_address
;
498 insn
->u
.ll
.lab2
= label
;
500 frchain_now
->frch_cfi_data
->last_address
= label
;
503 /* Add a DW_CFA_offset record to the CFI data. */
506 cfi_add_CFA_offset (unsigned regno
, offsetT offset
)
508 unsigned int abs_data_align
;
510 gas_assert (DWARF2_CIE_DATA_ALIGNMENT
!= 0);
511 cfi_add_CFA_insn_reg_offset (DW_CFA_offset
, regno
, offset
);
513 abs_data_align
= (DWARF2_CIE_DATA_ALIGNMENT
< 0
514 ? -DWARF2_CIE_DATA_ALIGNMENT
: DWARF2_CIE_DATA_ALIGNMENT
);
515 if (offset
% abs_data_align
)
516 as_bad (_("register save offset not a multiple of %u"), abs_data_align
);
519 /* Add a DW_CFA_def_cfa record to the CFI data. */
522 cfi_add_CFA_def_cfa (unsigned regno
, offsetT offset
)
524 cfi_add_CFA_insn_reg_offset (DW_CFA_def_cfa
, regno
, offset
);
525 frchain_now
->frch_cfi_data
->cur_cfa_offset
= offset
;
528 /* Add a DW_CFA_register record to the CFI data. */
531 cfi_add_CFA_register (unsigned reg1
, unsigned reg2
)
533 cfi_add_CFA_insn_reg_reg (DW_CFA_register
, reg1
, reg2
);
536 /* Add a DW_CFA_def_cfa_register record to the CFI data. */
539 cfi_add_CFA_def_cfa_register (unsigned regno
)
541 cfi_add_CFA_insn_reg (DW_CFA_def_cfa_register
, regno
);
544 /* Add a DW_CFA_def_cfa_offset record to the CFI data. */
547 cfi_add_CFA_def_cfa_offset (offsetT offset
)
549 cfi_add_CFA_insn_offset (DW_CFA_def_cfa_offset
, offset
);
550 frchain_now
->frch_cfi_data
->cur_cfa_offset
= offset
;
554 cfi_add_CFA_restore (unsigned regno
)
556 cfi_add_CFA_insn_reg (DW_CFA_restore
, regno
);
560 cfi_add_CFA_undefined (unsigned regno
)
562 cfi_add_CFA_insn_reg (DW_CFA_undefined
, regno
);
566 cfi_add_CFA_same_value (unsigned regno
)
568 cfi_add_CFA_insn_reg (DW_CFA_same_value
, regno
);
572 cfi_add_CFA_remember_state (void)
574 struct cfa_save_data
*p
;
576 cfi_add_CFA_insn (DW_CFA_remember_state
);
578 p
= (struct cfa_save_data
*) xmalloc (sizeof (*p
));
579 p
->cfa_offset
= frchain_now
->frch_cfi_data
->cur_cfa_offset
;
580 p
->next
= frchain_now
->frch_cfi_data
->cfa_save_stack
;
581 frchain_now
->frch_cfi_data
->cfa_save_stack
= p
;
585 cfi_add_CFA_restore_state (void)
587 struct cfa_save_data
*p
;
589 cfi_add_CFA_insn (DW_CFA_restore_state
);
591 p
= frchain_now
->frch_cfi_data
->cfa_save_stack
;
594 frchain_now
->frch_cfi_data
->cur_cfa_offset
= p
->cfa_offset
;
595 frchain_now
->frch_cfi_data
->cfa_save_stack
= p
->next
;
599 as_bad (_("CFI state restore without previous remember"));
603 /* Parse CFI assembler directives. */
605 static void dot_cfi (int);
606 static void dot_cfi_escape (int);
607 static void dot_cfi_sections (int);
608 static void dot_cfi_startproc (int);
609 static void dot_cfi_endproc (int);
610 static void dot_cfi_personality (int);
611 static void dot_cfi_lsda (int);
612 static void dot_cfi_val_encoded_addr (int);
614 /* Fake CFI type; outside the byte range of any real CFI insn. */
615 #define CFI_adjust_cfa_offset 0x100
616 #define CFI_return_column 0x101
617 #define CFI_rel_offset 0x102
618 #define CFI_escape 0x103
619 #define CFI_signal_frame 0x104
620 #define CFI_val_encoded_addr 0x105
622 const pseudo_typeS cfi_pseudo_table
[] =
624 { "cfi_sections", dot_cfi_sections
, 0 },
625 { "cfi_startproc", dot_cfi_startproc
, 0 },
626 { "cfi_endproc", dot_cfi_endproc
, 0 },
627 { "cfi_def_cfa", dot_cfi
, DW_CFA_def_cfa
},
628 { "cfi_def_cfa_register", dot_cfi
, DW_CFA_def_cfa_register
},
629 { "cfi_def_cfa_offset", dot_cfi
, DW_CFA_def_cfa_offset
},
630 { "cfi_adjust_cfa_offset", dot_cfi
, CFI_adjust_cfa_offset
},
631 { "cfi_offset", dot_cfi
, DW_CFA_offset
},
632 { "cfi_rel_offset", dot_cfi
, CFI_rel_offset
},
633 { "cfi_register", dot_cfi
, DW_CFA_register
},
634 { "cfi_return_column", dot_cfi
, CFI_return_column
},
635 { "cfi_restore", dot_cfi
, DW_CFA_restore
},
636 { "cfi_undefined", dot_cfi
, DW_CFA_undefined
},
637 { "cfi_same_value", dot_cfi
, DW_CFA_same_value
},
638 { "cfi_remember_state", dot_cfi
, DW_CFA_remember_state
},
639 { "cfi_restore_state", dot_cfi
, DW_CFA_restore_state
},
640 { "cfi_window_save", dot_cfi
, DW_CFA_GNU_window_save
},
641 { "cfi_escape", dot_cfi_escape
, 0 },
642 { "cfi_signal_frame", dot_cfi
, CFI_signal_frame
},
643 { "cfi_personality", dot_cfi_personality
, 0 },
644 { "cfi_lsda", dot_cfi_lsda
, 0 },
645 { "cfi_val_encoded_addr", dot_cfi_val_encoded_addr
, 0 },
650 cfi_parse_separator (void)
653 if (*input_line_pointer
== ',')
654 input_line_pointer
++;
656 as_bad (_("missing separator"));
659 #ifndef tc_parse_to_dw2regnum
661 tc_parse_to_dw2regnum (expressionS
*exp
)
663 # ifdef tc_regname_to_dw2regnum
665 if (is_name_beginner (*input_line_pointer
)
666 || (*input_line_pointer
== '%'
667 && is_name_beginner (*++input_line_pointer
)))
671 name
= input_line_pointer
;
672 c
= get_symbol_end ();
674 exp
->X_op
= O_constant
;
675 exp
->X_add_number
= tc_regname_to_dw2regnum (name
);
677 *input_line_pointer
= c
;
681 expression_and_evaluate (exp
);
691 tc_parse_to_dw2regnum (&exp
);
696 regno
= exp
.X_add_number
;
706 as_bad (_("bad register expression"));
714 cfi_parse_const (void)
716 return get_absolute_expression ();
725 if (frchain_now
->frch_cfi_data
== NULL
)
727 as_bad (_("CFI instruction used without previous .cfi_startproc"));
728 ignore_rest_of_line ();
732 /* If the last address was not at the current PC, advance to current. */
733 if (symbol_get_frag (frchain_now
->frch_cfi_data
->last_address
) != frag_now
734 || S_GET_VALUE (frchain_now
->frch_cfi_data
->last_address
)
736 cfi_add_advance_loc (symbol_temp_new_now ());
741 reg1
= cfi_parse_reg ();
742 cfi_parse_separator ();
743 offset
= cfi_parse_const ();
744 cfi_add_CFA_offset (reg1
, offset
);
748 reg1
= cfi_parse_reg ();
749 cfi_parse_separator ();
750 offset
= cfi_parse_const ();
751 cfi_add_CFA_offset (reg1
,
752 offset
- frchain_now
->frch_cfi_data
->cur_cfa_offset
);
756 reg1
= cfi_parse_reg ();
757 cfi_parse_separator ();
758 offset
= cfi_parse_const ();
759 cfi_add_CFA_def_cfa (reg1
, offset
);
762 case DW_CFA_register
:
763 reg1
= cfi_parse_reg ();
764 cfi_parse_separator ();
765 reg2
= cfi_parse_reg ();
766 cfi_add_CFA_register (reg1
, reg2
);
769 case DW_CFA_def_cfa_register
:
770 reg1
= cfi_parse_reg ();
771 cfi_add_CFA_def_cfa_register (reg1
);
774 case DW_CFA_def_cfa_offset
:
775 offset
= cfi_parse_const ();
776 cfi_add_CFA_def_cfa_offset (offset
);
779 case CFI_adjust_cfa_offset
:
780 offset
= cfi_parse_const ();
781 cfi_add_CFA_def_cfa_offset (frchain_now
->frch_cfi_data
->cur_cfa_offset
788 reg1
= cfi_parse_reg ();
789 cfi_add_CFA_restore (reg1
);
791 if (*input_line_pointer
!= ',')
793 ++input_line_pointer
;
797 case DW_CFA_undefined
:
800 reg1
= cfi_parse_reg ();
801 cfi_add_CFA_undefined (reg1
);
803 if (*input_line_pointer
!= ',')
805 ++input_line_pointer
;
809 case DW_CFA_same_value
:
810 reg1
= cfi_parse_reg ();
811 cfi_add_CFA_same_value (reg1
);
814 case CFI_return_column
:
815 reg1
= cfi_parse_reg ();
816 cfi_set_return_column (reg1
);
819 case DW_CFA_remember_state
:
820 cfi_add_CFA_remember_state ();
823 case DW_CFA_restore_state
:
824 cfi_add_CFA_restore_state ();
827 case DW_CFA_GNU_window_save
:
828 cfi_add_CFA_insn (DW_CFA_GNU_window_save
);
831 case CFI_signal_frame
:
832 frchain_now
->frch_cfi_data
->cur_fde_data
->signal_frame
= 1;
839 demand_empty_rest_of_line ();
843 dot_cfi_escape (int ignored ATTRIBUTE_UNUSED
)
845 struct cfi_escape_data
*head
, **tail
, *e
;
846 struct cfi_insn_data
*insn
;
848 if (frchain_now
->frch_cfi_data
== NULL
)
850 as_bad (_("CFI instruction used without previous .cfi_startproc"));
851 ignore_rest_of_line ();
855 /* If the last address was not at the current PC, advance to current. */
856 if (symbol_get_frag (frchain_now
->frch_cfi_data
->last_address
) != frag_now
857 || S_GET_VALUE (frchain_now
->frch_cfi_data
->last_address
)
859 cfi_add_advance_loc (symbol_temp_new_now ());
864 e
= (struct cfi_escape_data
*) xmalloc (sizeof (*e
));
865 do_parse_cons_expression (&e
->exp
, 1);
869 while (*input_line_pointer
++ == ',');
872 insn
= alloc_cfi_insn_data ();
873 insn
->insn
= CFI_escape
;
876 --input_line_pointer
;
877 demand_empty_rest_of_line ();
881 dot_cfi_personality (int ignored ATTRIBUTE_UNUSED
)
883 struct fde_entry
*fde
;
886 if (frchain_now
->frch_cfi_data
== NULL
)
888 as_bad (_("CFI instruction used without previous .cfi_startproc"));
889 ignore_rest_of_line ();
893 fde
= frchain_now
->frch_cfi_data
->cur_fde_data
;
894 encoding
= cfi_parse_const ();
895 if (encoding
== DW_EH_PE_omit
)
897 demand_empty_rest_of_line ();
898 fde
->per_encoding
= encoding
;
902 if ((encoding
& 0xff) != encoding
903 || ((encoding
& 0x70) != 0
904 #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
905 && (encoding
& 0x70) != DW_EH_PE_pcrel
908 /* leb128 can be handled, but does something actually need it? */
909 || (encoding
& 7) == DW_EH_PE_uleb128
910 || (encoding
& 7) > DW_EH_PE_udata8
)
912 as_bad (_("invalid or unsupported encoding in .cfi_personality"));
913 ignore_rest_of_line ();
917 if (*input_line_pointer
++ != ',')
919 as_bad (_(".cfi_personality requires encoding and symbol arguments"));
920 ignore_rest_of_line ();
924 expression_and_evaluate (&fde
->personality
);
925 switch (fde
->personality
.X_op
)
930 if ((encoding
& 0x70) == DW_EH_PE_pcrel
)
931 encoding
= DW_EH_PE_omit
;
934 encoding
= DW_EH_PE_omit
;
938 fde
->per_encoding
= encoding
;
940 if (encoding
== DW_EH_PE_omit
)
942 as_bad (_("wrong second argument to .cfi_personality"));
943 ignore_rest_of_line ();
947 demand_empty_rest_of_line ();
951 dot_cfi_lsda (int ignored ATTRIBUTE_UNUSED
)
953 struct fde_entry
*fde
;
956 if (frchain_now
->frch_cfi_data
== NULL
)
958 as_bad (_("CFI instruction used without previous .cfi_startproc"));
959 ignore_rest_of_line ();
963 fde
= frchain_now
->frch_cfi_data
->cur_fde_data
;
964 encoding
= cfi_parse_const ();
965 if (encoding
== DW_EH_PE_omit
)
967 demand_empty_rest_of_line ();
968 fde
->lsda_encoding
= encoding
;
972 if ((encoding
& 0xff) != encoding
973 || ((encoding
& 0x70) != 0
974 #if CFI_DIFF_LSDA_OK || defined tc_cfi_emit_pcrel_expr
975 && (encoding
& 0x70) != DW_EH_PE_pcrel
978 /* leb128 can be handled, but does something actually need it? */
979 || (encoding
& 7) == DW_EH_PE_uleb128
980 || (encoding
& 7) > DW_EH_PE_udata8
)
982 as_bad (_("invalid or unsupported encoding in .cfi_lsda"));
983 ignore_rest_of_line ();
987 if (*input_line_pointer
++ != ',')
989 as_bad (_(".cfi_lsda requires encoding and symbol arguments"));
990 ignore_rest_of_line ();
994 fde
->lsda_encoding
= encoding
;
996 expression_and_evaluate (&fde
->lsda
);
997 switch (fde
->lsda
.X_op
)
1002 if ((encoding
& 0x70) == DW_EH_PE_pcrel
)
1003 encoding
= DW_EH_PE_omit
;
1006 encoding
= DW_EH_PE_omit
;
1010 fde
->lsda_encoding
= encoding
;
1012 if (encoding
== DW_EH_PE_omit
)
1014 as_bad (_("wrong second argument to .cfi_lsda"));
1015 ignore_rest_of_line ();
1019 demand_empty_rest_of_line ();
1023 dot_cfi_val_encoded_addr (int ignored ATTRIBUTE_UNUSED
)
1025 struct cfi_insn_data
*insn_ptr
;
1028 if (frchain_now
->frch_cfi_data
== NULL
)
1030 as_bad (_("CFI instruction used without previous .cfi_startproc"));
1031 ignore_rest_of_line ();
1035 /* If the last address was not at the current PC, advance to current. */
1036 if (symbol_get_frag (frchain_now
->frch_cfi_data
->last_address
) != frag_now
1037 || S_GET_VALUE (frchain_now
->frch_cfi_data
->last_address
)
1039 cfi_add_advance_loc (symbol_temp_new_now ());
1041 insn_ptr
= alloc_cfi_insn_data ();
1042 insn_ptr
->insn
= CFI_val_encoded_addr
;
1044 insn_ptr
->u
.ea
.reg
= cfi_parse_reg ();
1046 cfi_parse_separator ();
1047 encoding
= cfi_parse_const ();
1048 if ((encoding
& 0xff) != encoding
1049 || ((encoding
& 0x70) != 0
1050 #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
1051 && (encoding
& 0x70) != DW_EH_PE_pcrel
1054 /* leb128 can be handled, but does something actually need it? */
1055 || (encoding
& 7) == DW_EH_PE_uleb128
1056 || (encoding
& 7) > DW_EH_PE_udata8
)
1058 as_bad (_("invalid or unsupported encoding in .cfi_lsda"));
1059 encoding
= DW_EH_PE_omit
;
1062 cfi_parse_separator ();
1063 expression_and_evaluate (&insn_ptr
->u
.ea
.exp
);
1064 switch (insn_ptr
->u
.ea
.exp
.X_op
)
1069 if ((encoding
& 0x70) != DW_EH_PE_pcrel
)
1072 encoding
= DW_EH_PE_omit
;
1076 insn_ptr
->u
.ea
.encoding
= encoding
;
1077 if (encoding
== DW_EH_PE_omit
)
1079 as_bad (_("wrong third argument to .cfi_val_encoded_addr"));
1080 ignore_rest_of_line ();
1084 demand_empty_rest_of_line ();
1087 /* By default emit .eh_frame only, not .debug_frame. */
1088 #define CFI_EMIT_eh_frame (1 << 0)
1089 #define CFI_EMIT_debug_frame (1 << 1)
1090 static int cfi_sections
= CFI_EMIT_eh_frame
;
1093 dot_cfi_sections (int ignored ATTRIBUTE_UNUSED
)
1098 if (is_name_beginner (*input_line_pointer
))
1103 name
= input_line_pointer
;
1104 c
= get_symbol_end ();
1106 if (strncmp (name
, ".eh_frame", sizeof ".eh_frame") == 0
1108 sections
|= CFI_EMIT_eh_frame
;
1109 else if (strncmp (name
, ".debug_frame", sizeof ".debug_frame") == 0)
1110 sections
|= CFI_EMIT_debug_frame
;
1113 *input_line_pointer
= c
;
1114 input_line_pointer
= name
;
1118 *input_line_pointer
= c
;
1120 if (*input_line_pointer
== ',')
1122 name
= input_line_pointer
++;
1124 if (!is_name_beginner (*input_line_pointer
))
1126 input_line_pointer
= name
;
1130 else if (is_name_beginner (*input_line_pointer
))
1134 demand_empty_rest_of_line ();
1135 cfi_sections
= sections
;
1139 dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED
)
1143 if (frchain_now
->frch_cfi_data
!= NULL
)
1145 as_bad (_("previous CFI entry not closed (missing .cfi_endproc)"));
1146 ignore_rest_of_line ();
1150 cfi_new_fde (symbol_temp_new_now ());
1153 if (is_name_beginner (*input_line_pointer
))
1157 name
= input_line_pointer
;
1158 c
= get_symbol_end ();
1160 if (strcmp (name
, "simple") == 0)
1163 *input_line_pointer
= c
;
1166 input_line_pointer
= name
;
1168 demand_empty_rest_of_line ();
1170 frchain_now
->frch_cfi_data
->cur_cfa_offset
= 0;
1172 tc_cfi_frame_initial_instructions ();
1176 dot_cfi_endproc (int ignored ATTRIBUTE_UNUSED
)
1178 if (frchain_now
->frch_cfi_data
== NULL
)
1180 as_bad (_(".cfi_endproc without corresponding .cfi_startproc"));
1181 ignore_rest_of_line ();
1185 cfi_end_fde (symbol_temp_new_now ());
1187 demand_empty_rest_of_line ();
1191 /* Emit a single byte into the current segment. */
1196 FRAG_APPEND_1_CHAR (byte
);
1199 /* Emit a two-byte word into the current segment. */
1204 md_number_to_chars (frag_more (2), data
, 2);
1207 /* Emit a four byte word into the current segment. */
1212 md_number_to_chars (frag_more (4), data
, 4);
1215 /* Emit an unsigned "little-endian base 128" number. */
1218 out_uleb128 (addressT value
)
1220 output_leb128 (frag_more (sizeof_leb128 (value
, 0)), value
, 0);
1223 /* Emit an unsigned "little-endian base 128" number. */
1226 out_sleb128 (offsetT value
)
1228 output_leb128 (frag_more (sizeof_leb128 (value
, 1)), value
, 1);
1232 output_cfi_insn (struct cfi_insn_data
*insn
)
1239 case DW_CFA_advance_loc
:
1241 symbolS
*from
= insn
->u
.ll
.lab1
;
1242 symbolS
*to
= insn
->u
.ll
.lab2
;
1244 if (symbol_get_frag (to
) == symbol_get_frag (from
))
1246 addressT delta
= S_GET_VALUE (to
) - S_GET_VALUE (from
);
1247 addressT scaled
= delta
/ DWARF2_LINE_MIN_INSN_LENGTH
;
1250 out_one (DW_CFA_advance_loc
+ scaled
);
1251 else if (scaled
<= 0xFF)
1253 out_one (DW_CFA_advance_loc1
);
1256 else if (scaled
<= 0xFFFF)
1258 out_one (DW_CFA_advance_loc2
);
1263 out_one (DW_CFA_advance_loc4
);
1271 exp
.X_op
= O_subtract
;
1272 exp
.X_add_symbol
= to
;
1273 exp
.X_op_symbol
= from
;
1274 exp
.X_add_number
= 0;
1276 /* The code in ehopt.c expects that one byte of the encoding
1277 is already allocated to the frag. This comes from the way
1278 that it scans the .eh_frame section looking first for the
1279 .byte DW_CFA_advance_loc4. */
1280 *frag_more (1) = DW_CFA_advance_loc4
;
1282 frag_var (rs_cfa
, 4, 0, DWARF2_LINE_MIN_INSN_LENGTH
<< 3,
1283 make_expr_symbol (&exp
), frag_now_fix () - 1,
1289 case DW_CFA_def_cfa
:
1290 offset
= insn
->u
.ri
.offset
;
1293 out_one (DW_CFA_def_cfa_sf
);
1294 out_uleb128 (insn
->u
.ri
.reg
);
1295 out_sleb128 (offset
/ DWARF2_CIE_DATA_ALIGNMENT
);
1299 out_one (DW_CFA_def_cfa
);
1300 out_uleb128 (insn
->u
.ri
.reg
);
1301 out_uleb128 (offset
);
1305 case DW_CFA_def_cfa_register
:
1306 case DW_CFA_undefined
:
1307 case DW_CFA_same_value
:
1308 out_one (insn
->insn
);
1309 out_uleb128 (insn
->u
.r
);
1312 case DW_CFA_def_cfa_offset
:
1316 out_one (DW_CFA_def_cfa_offset_sf
);
1317 out_sleb128 (offset
/ DWARF2_CIE_DATA_ALIGNMENT
);
1321 out_one (DW_CFA_def_cfa_offset
);
1322 out_uleb128 (offset
);
1326 case DW_CFA_restore
:
1330 out_one (DW_CFA_restore
+ regno
);
1334 out_one (DW_CFA_restore_extended
);
1335 out_uleb128 (regno
);
1340 regno
= insn
->u
.ri
.reg
;
1341 offset
= insn
->u
.ri
.offset
/ DWARF2_CIE_DATA_ALIGNMENT
;
1344 out_one (DW_CFA_offset_extended_sf
);
1345 out_uleb128 (regno
);
1346 out_sleb128 (offset
);
1348 else if (regno
<= 0x3F)
1350 out_one (DW_CFA_offset
+ regno
);
1351 out_uleb128 (offset
);
1355 out_one (DW_CFA_offset_extended
);
1356 out_uleb128 (regno
);
1357 out_uleb128 (offset
);
1361 case DW_CFA_register
:
1362 out_one (DW_CFA_register
);
1363 out_uleb128 (insn
->u
.rr
.reg1
);
1364 out_uleb128 (insn
->u
.rr
.reg2
);
1367 case DW_CFA_remember_state
:
1368 case DW_CFA_restore_state
:
1369 out_one (insn
->insn
);
1372 case DW_CFA_GNU_window_save
:
1373 out_one (DW_CFA_GNU_window_save
);
1378 struct cfi_escape_data
*e
;
1379 for (e
= insn
->u
.esc
; e
; e
= e
->next
)
1380 emit_expr (&e
->exp
, 1);
1384 case CFI_val_encoded_addr
:
1386 unsigned encoding
= insn
->u
.ea
.encoding
;
1387 offsetT encoding_size
;
1389 if (encoding
== DW_EH_PE_omit
)
1391 out_one (DW_CFA_val_expression
);
1392 out_uleb128 (insn
->u
.ea
.reg
);
1394 switch (encoding
& 0x7)
1396 case DW_EH_PE_absptr
:
1397 encoding_size
= DWARF2_ADDR_SIZE (stdoutput
);
1399 case DW_EH_PE_udata2
:
1402 case DW_EH_PE_udata4
:
1405 case DW_EH_PE_udata8
:
1412 /* If the user has requested absolute encoding,
1413 then use the smaller DW_OP_addr encoding. */
1414 if (insn
->u
.ea
.encoding
== DW_EH_PE_absptr
)
1416 out_uleb128 (1 + encoding_size
);
1417 out_one (DW_OP_addr
);
1421 out_uleb128 (1 + 1 + encoding_size
);
1422 out_one (DW_OP_GNU_encoded_addr
);
1425 if ((encoding
& 0x70) == DW_EH_PE_pcrel
)
1427 #if CFI_DIFF_EXPR_OK
1428 insn
->u
.ea
.exp
.X_op
= O_subtract
;
1429 insn
->u
.ea
.exp
.X_op_symbol
= symbol_temp_new_now ();
1430 #elif defined (tc_cfi_emit_pcrel_expr)
1431 tc_cfi_emit_pcrel_expr (&insn
->u
.ea
.exp
, encoding_size
);
1438 emit_expr (&insn
->u
.ea
.exp
, encoding_size
);
1448 encoding_size (unsigned char encoding
)
1450 if (encoding
== DW_EH_PE_omit
)
1452 switch (encoding
& 0x7)
1455 return bfd_get_arch_size (stdoutput
) == 64 ? 8 : 4;
1456 case DW_EH_PE_udata2
:
1458 case DW_EH_PE_udata4
:
1460 case DW_EH_PE_udata8
:
1468 output_cie (struct cie_entry
*cie
, bfd_boolean eh_frame
, int align
)
1470 symbolS
*after_size_address
, *end_address
;
1472 struct cfi_insn_data
*i
;
1473 offsetT augmentation_size
;
1475 enum dwarf2_format fmt
= DWARF2_FORMAT (now_seg
);
1477 cie
->start_address
= symbol_temp_new_now ();
1478 after_size_address
= symbol_temp_make ();
1479 end_address
= symbol_temp_make ();
1481 exp
.X_op
= O_subtract
;
1482 exp
.X_add_symbol
= end_address
;
1483 exp
.X_op_symbol
= after_size_address
;
1484 exp
.X_add_number
= 0;
1486 if (eh_frame
|| fmt
== dwarf2_format_32bit
)
1487 emit_expr (&exp
, 4); /* Length. */
1490 if (fmt
== dwarf2_format_64bit
)
1492 emit_expr (&exp
, 8); /* Length. */
1494 symbol_set_value_now (after_size_address
);
1496 out_four (0); /* CIE id. */
1499 out_four (-1); /* CIE id. */
1500 if (fmt
!= dwarf2_format_32bit
)
1503 out_one (DW_CIE_VERSION
); /* Version. */
1506 out_one ('z'); /* Augmentation. */
1507 if (cie
->per_encoding
!= DW_EH_PE_omit
)
1509 if (cie
->lsda_encoding
!= DW_EH_PE_omit
)
1513 if (cie
->signal_frame
)
1516 out_uleb128 (DWARF2_LINE_MIN_INSN_LENGTH
); /* Code alignment. */
1517 out_sleb128 (DWARF2_CIE_DATA_ALIGNMENT
); /* Data alignment. */
1518 if (DW_CIE_VERSION
== 1) /* Return column. */
1519 out_one (cie
->return_column
);
1521 out_uleb128 (cie
->return_column
);
1524 augmentation_size
= 1 + (cie
->lsda_encoding
!= DW_EH_PE_omit
);
1525 if (cie
->per_encoding
!= DW_EH_PE_omit
)
1526 augmentation_size
+= 1 + encoding_size (cie
->per_encoding
);
1527 out_uleb128 (augmentation_size
); /* Augmentation size. */
1529 if (cie
->per_encoding
!= DW_EH_PE_omit
)
1531 offsetT size
= encoding_size (cie
->per_encoding
);
1532 out_one (cie
->per_encoding
);
1533 exp
= cie
->personality
;
1534 if ((cie
->per_encoding
& 0x70) == DW_EH_PE_pcrel
)
1536 #if CFI_DIFF_EXPR_OK
1537 exp
.X_op
= O_subtract
;
1538 exp
.X_op_symbol
= symbol_temp_new_now ();
1539 emit_expr (&exp
, size
);
1540 #elif defined (tc_cfi_emit_pcrel_expr)
1541 tc_cfi_emit_pcrel_expr (&exp
, size
);
1547 emit_expr (&exp
, size
);
1550 if (cie
->lsda_encoding
!= DW_EH_PE_omit
)
1551 out_one (cie
->lsda_encoding
);
1554 switch (DWARF2_FDE_RELOC_SIZE
)
1557 enc
= DW_EH_PE_sdata2
;
1560 enc
= DW_EH_PE_sdata4
;
1563 enc
= DW_EH_PE_sdata8
;
1568 #if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
1569 enc
|= DW_EH_PE_pcrel
;
1576 for (i
= cie
->first
; i
!= cie
->last
; i
= i
->next
)
1578 if (CUR_SEG (i
) != CUR_SEG (cie
))
1580 output_cfi_insn (i
);
1584 frag_align (align
, DW_CFA_nop
, 0);
1585 symbol_set_value_now (end_address
);
1589 output_fde (struct fde_entry
*fde
, struct cie_entry
*cie
,
1590 bfd_boolean eh_frame
, struct cfi_insn_data
*first
,
1593 symbolS
*after_size_address
, *end_address
;
1595 offsetT augmentation_size
;
1596 enum dwarf2_format fmt
= DWARF2_FORMAT (now_seg
);
1600 after_size_address
= symbol_temp_make ();
1601 end_address
= symbol_temp_make ();
1603 exp
.X_op
= O_subtract
;
1604 exp
.X_add_symbol
= end_address
;
1605 exp
.X_op_symbol
= after_size_address
;
1606 exp
.X_add_number
= 0;
1607 if (eh_frame
|| fmt
== dwarf2_format_32bit
)
1611 if (fmt
== dwarf2_format_64bit
)
1615 emit_expr (&exp
, offset_size
); /* Length. */
1616 symbol_set_value_now (after_size_address
);
1620 exp
.X_op
= O_subtract
;
1621 exp
.X_add_symbol
= after_size_address
;
1622 exp
.X_op_symbol
= cie
->start_address
;
1623 exp
.X_add_number
= 0;
1624 emit_expr (&exp
, offset_size
); /* CIE offset. */
1628 TC_DWARF2_EMIT_OFFSET (cie
->start_address
, offset_size
);
1633 exp
.X_op
= O_subtract
;
1634 exp
.X_add_number
= 0;
1635 #if CFI_DIFF_EXPR_OK
1636 exp
.X_add_symbol
= fde
->start_address
;
1637 exp
.X_op_symbol
= symbol_temp_new_now ();
1638 emit_expr (&exp
, DWARF2_FDE_RELOC_SIZE
); /* Code offset. */
1640 exp
.X_op
= O_symbol
;
1641 exp
.X_add_symbol
= fde
->start_address
;
1642 #ifdef tc_cfi_emit_pcrel_expr
1643 tc_cfi_emit_pcrel_expr (&exp
, DWARF2_FDE_RELOC_SIZE
); /* Code offset. */
1645 emit_expr (&exp
, DWARF2_FDE_RELOC_SIZE
); /* Code offset. */
1648 addr_size
= DWARF2_FDE_RELOC_SIZE
;
1652 exp
.X_op
= O_symbol
;
1653 exp
.X_add_symbol
= fde
->start_address
;
1654 exp
.X_add_number
= 0;
1655 addr_size
= DWARF2_ADDR_SIZE (stdoutput
);
1656 emit_expr (&exp
, addr_size
);
1659 exp
.X_op
= O_subtract
;
1660 exp
.X_add_symbol
= fde
->end_address
;
1661 exp
.X_op_symbol
= fde
->start_address
; /* Code length. */
1662 exp
.X_add_number
= 0;
1663 emit_expr (&exp
, addr_size
);
1665 augmentation_size
= encoding_size (fde
->lsda_encoding
);
1667 out_uleb128 (augmentation_size
); /* Augmentation size. */
1669 if (fde
->lsda_encoding
!= DW_EH_PE_omit
)
1672 if ((fde
->lsda_encoding
& 0x70) == DW_EH_PE_pcrel
)
1674 #if CFI_DIFF_LSDA_OK
1675 exp
.X_op
= O_subtract
;
1676 exp
.X_op_symbol
= symbol_temp_new_now ();
1677 emit_expr (&exp
, augmentation_size
);
1678 #elif defined (tc_cfi_emit_pcrel_expr)
1679 tc_cfi_emit_pcrel_expr (&exp
, augmentation_size
);
1685 emit_expr (&exp
, augmentation_size
);
1688 for (; first
; first
= first
->next
)
1689 if (CUR_SEG (first
) == CUR_SEG (fde
))
1690 output_cfi_insn (first
);
1692 frag_align (align
, DW_CFA_nop
, 0);
1693 symbol_set_value_now (end_address
);
1696 static struct cie_entry
*
1697 select_cie_for_fde (struct fde_entry
*fde
, bfd_boolean eh_frame
,
1698 struct cfi_insn_data
**pfirst
, int align
)
1700 struct cfi_insn_data
*i
, *j
;
1701 struct cie_entry
*cie
;
1703 for (cie
= cie_root
; cie
; cie
= cie
->next
)
1705 if (CUR_SEG (cie
) != CUR_SEG (fde
))
1707 if (cie
->return_column
!= fde
->return_column
1708 || cie
->signal_frame
!= fde
->signal_frame
1709 || cie
->per_encoding
!= fde
->per_encoding
1710 || cie
->lsda_encoding
!= fde
->lsda_encoding
)
1712 if (cie
->per_encoding
!= DW_EH_PE_omit
)
1714 if (cie
->personality
.X_op
!= fde
->personality
.X_op
1715 || cie
->personality
.X_add_number
1716 != fde
->personality
.X_add_number
)
1718 switch (cie
->personality
.X_op
)
1721 if (cie
->personality
.X_unsigned
!= fde
->personality
.X_unsigned
)
1725 if (cie
->personality
.X_add_symbol
1726 != fde
->personality
.X_add_symbol
)
1733 for (i
= cie
->first
, j
= fde
->data
;
1734 i
!= cie
->last
&& j
!= NULL
;
1735 i
= i
->next
, j
= j
->next
)
1737 if (i
->insn
!= j
->insn
)
1741 case DW_CFA_advance_loc
:
1742 case DW_CFA_remember_state
:
1743 /* We reached the first advance/remember in the FDE,
1744 but did not reach the end of the CIE list. */
1748 case DW_CFA_def_cfa
:
1749 if (i
->u
.ri
.reg
!= j
->u
.ri
.reg
)
1751 if (i
->u
.ri
.offset
!= j
->u
.ri
.offset
)
1755 case DW_CFA_register
:
1756 if (i
->u
.rr
.reg1
!= j
->u
.rr
.reg1
)
1758 if (i
->u
.rr
.reg2
!= j
->u
.rr
.reg2
)
1762 case DW_CFA_def_cfa_register
:
1763 case DW_CFA_restore
:
1764 case DW_CFA_undefined
:
1765 case DW_CFA_same_value
:
1766 if (i
->u
.r
!= j
->u
.r
)
1770 case DW_CFA_def_cfa_offset
:
1771 if (i
->u
.i
!= j
->u
.i
)
1776 case CFI_val_encoded_addr
:
1777 /* Don't bother matching these for now. */
1785 /* Success if we reached the end of the CIE list, and we've either
1786 run out of FDE entries or we've encountered an advance,
1787 remember, or escape. */
1790 || j
->insn
== DW_CFA_advance_loc
1791 || j
->insn
== DW_CFA_remember_state
1792 || j
->insn
== CFI_escape
1793 || j
->insn
== CFI_val_encoded_addr
))
1802 cie
= (struct cie_entry
*) xmalloc (sizeof (struct cie_entry
));
1803 cie
->next
= cie_root
;
1805 SET_CUR_SEG (cie
, CUR_SEG (fde
));
1806 cie
->return_column
= fde
->return_column
;
1807 cie
->signal_frame
= fde
->signal_frame
;
1808 cie
->per_encoding
= fde
->per_encoding
;
1809 cie
->lsda_encoding
= fde
->lsda_encoding
;
1810 cie
->personality
= fde
->personality
;
1811 cie
->first
= fde
->data
;
1813 for (i
= cie
->first
; i
; i
= i
->next
)
1814 if (i
->insn
== DW_CFA_advance_loc
1815 || i
->insn
== DW_CFA_remember_state
1816 || i
->insn
== CFI_escape
1817 || i
->insn
== CFI_val_encoded_addr
)
1823 output_cie (cie
, eh_frame
, align
);
1828 #ifdef md_reg_eh_frame_to_debug_frame
1830 cfi_change_reg_numbers (struct cfi_insn_data
*insn
, segT ccseg
)
1832 for (; insn
; insn
= insn
->next
)
1834 if (CUR_SEG (insn
) != ccseg
)
1838 case DW_CFA_advance_loc
:
1839 case DW_CFA_def_cfa_offset
:
1840 case DW_CFA_remember_state
:
1841 case DW_CFA_restore_state
:
1842 case DW_CFA_GNU_window_save
:
1846 case DW_CFA_def_cfa
:
1848 insn
->u
.ri
.reg
= md_reg_eh_frame_to_debug_frame (insn
->u
.ri
.reg
);
1851 case DW_CFA_def_cfa_register
:
1852 case DW_CFA_undefined
:
1853 case DW_CFA_same_value
:
1854 case DW_CFA_restore
:
1855 insn
->u
.r
= md_reg_eh_frame_to_debug_frame (insn
->u
.r
);
1858 case DW_CFA_register
:
1859 insn
->u
.rr
.reg1
= md_reg_eh_frame_to_debug_frame (insn
->u
.rr
.reg1
);
1860 insn
->u
.rr
.reg2
= md_reg_eh_frame_to_debug_frame (insn
->u
.rr
.reg2
);
1863 case CFI_val_encoded_addr
:
1864 insn
->u
.ea
.reg
= md_reg_eh_frame_to_debug_frame (insn
->u
.ea
.reg
);
1873 #define cfi_change_reg_numbers(insn, cseg) do { } while (0)
1877 get_cfi_seg (segT cseg
, const char *base
, flagword flags
, int align
)
1879 if (SUPPORT_FRAME_LINKONCE
)
1881 struct dwcfi_seg_list
*l
;
1883 l
= dwcfi_hash_find_or_make (cseg
, base
, flags
);
1886 subseg_set (cseg
, l
->subseg
);
1890 cseg
= subseg_new (base
, 0);
1891 bfd_set_section_flags (stdoutput
, cseg
, flags
);
1893 record_alignment (cseg
, align
);
1900 struct cie_entry
*cie
, *cie_next
;
1901 segT cfi_seg
, ccseg
;
1902 struct fde_entry
*fde
;
1903 struct cfi_insn_data
*first
;
1904 int save_flag_traditional_format
, seek_next_seg
;
1906 if (all_fde_data
== 0)
1909 if ((cfi_sections
& CFI_EMIT_eh_frame
) != 0)
1911 /* Make sure check_eh_frame doesn't do anything with our output. */
1912 save_flag_traditional_format
= flag_traditional_format
;
1913 flag_traditional_format
= 1;
1915 if (!SUPPORT_FRAME_LINKONCE
)
1917 /* Open .eh_frame section. */
1918 cfi_seg
= get_cfi_seg (NULL
, ".eh_frame",
1919 (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
1920 | DWARF2_EH_FRAME_READ_ONLY
),
1921 EH_FRAME_ALIGNMENT
);
1922 #ifdef md_fix_up_eh_frame
1923 md_fix_up_eh_frame (cfi_seg
);
1934 for (cie
= cie_root
; cie
; cie
= cie_next
)
1936 cie_next
= cie
->next
;
1937 free ((void *) cie
);
1941 for (fde
= all_fde_data
; fde
; fde
= fde
->next
)
1943 if (SUPPORT_FRAME_LINKONCE
)
1947 if (seek_next_seg
&& CUR_SEG (fde
) != ccseg
)
1954 ccseg
= CUR_SEG (fde
);
1955 /* Open .eh_frame section. */
1956 cfi_seg
= get_cfi_seg (ccseg
, ".eh_frame",
1957 (SEC_ALLOC
| SEC_LOAD
| SEC_DATA
1958 | DWARF2_EH_FRAME_READ_ONLY
),
1959 EH_FRAME_ALIGNMENT
);
1960 #ifdef md_fix_up_eh_frame
1961 md_fix_up_eh_frame (cfi_seg
);
1967 SET_HANDLED (fde
, 1);
1970 if (fde
->end_address
== NULL
)
1972 as_bad (_("open CFI at the end of file; missing .cfi_endproc directive"));
1973 fde
->end_address
= fde
->start_address
;
1976 cie
= select_cie_for_fde (fde
, TRUE
, &first
, 2);
1977 output_fde (fde
, cie
, TRUE
, first
,
1978 fde
->next
== NULL
? EH_FRAME_ALIGNMENT
: 2);
1981 while (SUPPORT_FRAME_LINKONCE
&& seek_next_seg
== 2);
1983 if (SUPPORT_FRAME_LINKONCE
)
1984 for (fde
= all_fde_data
; fde
; fde
= fde
->next
)
1985 SET_HANDLED (fde
, 0);
1987 flag_traditional_format
= save_flag_traditional_format
;
1990 if ((cfi_sections
& CFI_EMIT_debug_frame
) != 0)
1992 int alignment
= ffs (DWARF2_ADDR_SIZE (stdoutput
)) - 1;
1994 if (!SUPPORT_FRAME_LINKONCE
)
1995 get_cfi_seg (NULL
, ".debug_frame",
1996 SEC_READONLY
| SEC_DEBUGGING
,
2004 for (cie
= cie_root
; cie
; cie
= cie_next
)
2006 cie_next
= cie
->next
;
2007 free ((void *) cie
);
2011 for (fde
= all_fde_data
; fde
; fde
= fde
->next
)
2013 if (SUPPORT_FRAME_LINKONCE
)
2017 if (seek_next_seg
&& CUR_SEG (fde
) != ccseg
)
2024 ccseg
= CUR_SEG (fde
);
2025 /* Open .debug_frame section. */
2026 get_cfi_seg (ccseg
, ".debug_frame",
2027 SEC_READONLY
| SEC_DEBUGGING
,
2031 SET_HANDLED (fde
, 1);
2033 if (fde
->end_address
== NULL
)
2035 as_bad (_("open CFI at the end of file; missing .cfi_endproc directive"));
2036 fde
->end_address
= fde
->start_address
;
2039 fde
->per_encoding
= DW_EH_PE_omit
;
2040 fde
->lsda_encoding
= DW_EH_PE_omit
;
2041 cfi_change_reg_numbers (fde
->data
, ccseg
);
2042 cie
= select_cie_for_fde (fde
, FALSE
, &first
, alignment
);
2043 output_fde (fde
, cie
, FALSE
, first
, alignment
);
2046 while (SUPPORT_FRAME_LINKONCE
&& seek_next_seg
== 2);
2048 if (SUPPORT_FRAME_LINKONCE
)
2049 for (fde
= all_fde_data
; fde
; fde
= fde
->next
)
2050 SET_HANDLED (fde
, 0);
2054 #else /* TARGET_USE_CFIPOP */
2056 /* Emit an intelligible error message for missing support. */
2059 dot_cfi_dummy (int ignored ATTRIBUTE_UNUSED
)
2061 as_bad (_("CFI is not supported for this target"));
2062 ignore_rest_of_line ();
2065 const pseudo_typeS cfi_pseudo_table
[] =
2067 { "cfi_sections", dot_cfi_dummy
, 0 },
2068 { "cfi_startproc", dot_cfi_dummy
, 0 },
2069 { "cfi_endproc", dot_cfi_dummy
, 0 },
2070 { "cfi_def_cfa", dot_cfi_dummy
, 0 },
2071 { "cfi_def_cfa_register", dot_cfi_dummy
, 0 },
2072 { "cfi_def_cfa_offset", dot_cfi_dummy
, 0 },
2073 { "cfi_adjust_cfa_offset", dot_cfi_dummy
, 0 },
2074 { "cfi_offset", dot_cfi_dummy
, 0 },
2075 { "cfi_rel_offset", dot_cfi_dummy
, 0 },
2076 { "cfi_register", dot_cfi_dummy
, 0 },
2077 { "cfi_return_column", dot_cfi_dummy
, 0 },
2078 { "cfi_restore", dot_cfi_dummy
, 0 },
2079 { "cfi_undefined", dot_cfi_dummy
, 0 },
2080 { "cfi_same_value", dot_cfi_dummy
, 0 },
2081 { "cfi_remember_state", dot_cfi_dummy
, 0 },
2082 { "cfi_restore_state", dot_cfi_dummy
, 0 },
2083 { "cfi_window_save", dot_cfi_dummy
, 0 },
2084 { "cfi_escape", dot_cfi_dummy
, 0 },
2085 { "cfi_signal_frame", dot_cfi_dummy
, 0 },
2086 { "cfi_personality", dot_cfi_dummy
, 0 },
2087 { "cfi_lsda", dot_cfi_dummy
, 0 },
2088 { "cfi_val_encoded_addr", dot_cfi_dummy
, 0 },
2096 #endif /* TARGET_USE_CFIPOP */