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gas: Make dwarf2dbg.c versions specific and add DW_AT_high_pc case for DWARF 4+.

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* dwarf2dbg.c (DWARF2_ARANGES_VERSION): New define to 2.
    (DWARF2_LINE_VERSION): Likewise.
    (out_debug_line): Use DWARF2_LINE_VERSION not DWARF2_VERSION.
    (out_debug_aranges): Use DWARF2_ARANGES_VERSION not DWARF2_VERSION.
    (out_debug_abbrev): Use DW_FORM_data for DW_AT_high_pc when
    DWARF2_VERSION >= 4.
    (out_debug_info): Use difference between start and end as data
    value for DW_AT_high_pc when DWARF2_VERSION >= 4.
    * config/tc-ia64.h (DWARF2_LINE_VERSION): Override it.
This commit is contained in:
Mark Wielaard 2012-04-30 14:32:28 +00:00
parent 45162986de
commit 88ebb0a156
3 changed files with 37 additions and 4 deletions
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12
gas/ChangeLog
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@ -1,3 +1,15 @@
2012-04-26 Mark Wielaard <mjw@redhat.com>
* dwarf2dbg.c (DWARF2_ARANGES_VERSION): New define to 2.
(DWARF2_LINE_VERSION): Likewise.
(out_debug_line): Use DWARF2_LINE_VERSION not DWARF2_VERSION.
(out_debug_aranges): Use DWARF2_ARANGES_VERSION not DWARF2_VERSION.
(out_debug_abbrev): Use DW_FORM_data for DW_AT_high_pc when
DWARF2_VERSION >= 4.
(out_debug_info): Use difference between start and end as data
value for DW_AT_high_pc when DWARF2_VERSION >= 4.
* config/tc-ia64.h (DWARF2_LINE_VERSION): Override it.
2012-04-27 David S. Miller <davem@davemloft.net>
* doc/c-sparc.text: Document %l34 and %h34.

1
gas/config/tc-ia64.h
View File

@ -327,4 +327,5 @@ typedef struct unwind_record
/* VMS backtraces expect dwarf version 3. */
#ifdef TE_VMS
#define DWARF2_VERSION 3
#define DWARF2_LINE_VERSION 3
#endif

28
gas/dwarf2dbg.c
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@ -93,6 +93,16 @@
#define DWARF2_VERSION 2
#endif
/* The .debug_aranges version has been 2 in DWARF version 2, 3 and 4. */
#ifndef DWARF2_ARANGES_VERSION
#define DWARF2_ARANGES_VERSION 2
#endif
/* This implementation output version 2 .debug_line information. */
#ifndef DWARF2_LINE_VERSION
#define DWARF2_LINE_VERSION 2
#endif
#include "subsegs.h"
#include "dwarf2.h"
@ -1457,7 +1467,7 @@ out_debug_line (segT line_seg)
line_end = exp.X_add_symbol;
/* Version. */
out_two (DWARF2_VERSION);
out_two (DWARF2_LINE_VERSION);
/* Length of the prologue following this length. */
prologue_end = symbol_temp_make ();
@ -1565,7 +1575,7 @@ out_debug_aranges (segT aranges_seg, segT info_seg)
aranges_end = exp.X_add_symbol;
/* Version. */
out_two (DWARF2_VERSION);
out_two (DWARF2_ARANGES_VERSION);
/* Offset to .debug_info. */
TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset);
@ -1631,7 +1641,11 @@ out_debug_abbrev (segT abbrev_seg,
if (all_segs->next == NULL)
{
out_abbrev (DW_AT_low_pc, DW_FORM_addr);
out_abbrev (DW_AT_high_pc, DW_FORM_addr);
if (DWARF2_VERSION < 4)
out_abbrev (DW_AT_high_pc, DW_FORM_addr);
else
out_abbrev (DW_AT_high_pc, (sizeof_address == 4
? DW_FORM_data4 : DW_FORM_data8));
}
else
{
@ -1694,7 +1708,13 @@ out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg)
emit_expr (&exp, sizeof_address);
/* DW_AT_high_pc */
exp.X_op = O_symbol;
if (DWARF2_VERSION < 4)
exp.X_op = O_symbol;
else
{
exp.X_op = O_subtract;
exp.X_op_symbol = all_segs->text_start;
}
exp.X_add_symbol = all_segs->text_end;
exp.X_add_number = 0;
emit_expr (&exp, sizeof_address);