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* dwarf2dbg.c (out_debug_info): Add new parameter ranges_seg and emit 

DW_AT_ranges when code in compilation unit is not contiguous.
  (out_debug_abbrev): Emit DW_AT_ranges abbreviation if code in is not contiguous.
  (dwarf2_finish): Create and pass ranges_seg to out_debug_info.
  (out_debug_ranges): New function to emit .debug_ranges section when code is not contiguous.
This commit is contained in:
Nick Clifton 2006-08-08 08:29:08 +00:00
parent 720abc6078
commit 802f5d9e8e
2 changed files with 92 additions and 7 deletions
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11
gas/ChangeLog
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@ -1,3 +1,14 @@
2006-08-08 Sterling Augustine <sterling@tensilica.com>
* dwarf2dbg.c (out_debug_info): Add new parameter ranges_seg
and emit DW_AT_ranges when code in compilation unit is not
contiguous.
(out_debug_abbrev): Emit DW_AT_ranges abbreviation if code in
is not contiguous.
(dwarf2_finish): Create and pass ranges_seg to out_debug_info.
(out_debug_ranges): New function to emit .debug_ranges section
when code is not contiguous.
2006-08-08 Nick Clifton <nickc@redhat.com>
* config/tc-arm.c (WARN_DEPRECATED): Enable.

88
gas/dwarf2dbg.c
View File

@ -202,11 +202,9 @@ static void out_file_list (void);
static void out_debug_line (segT);
static void out_debug_aranges (segT, segT);
static void out_debug_abbrev (segT);
static void out_debug_info (segT, segT, segT);
#ifndef TC_DWARF2_EMIT_OFFSET
# define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset
static void generic_dwarf2_emit_offset (symbolS *, unsigned int);
#define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset
/* Create an offset to .dwarf2_*. */
@ -1290,6 +1288,54 @@ out_debug_line (segT line_seg)
symbol_set_value_now (line_end);
}
static void
out_debug_ranges (segT ranges_seg)
{
unsigned int addr_size = sizeof_address;
struct line_seg *s;
expressionS expr;
unsigned int i;
subseg_set (ranges_seg, 0);
/* Base Address Entry. */
for (i = 0; i < addr_size; i++)
out_byte (0xff);
for (i = 0; i < addr_size; i++)
out_byte (0);
/* Range List Entry. */
for (s = all_segs; s; s = s->next)
{
fragS *frag;
symbolS *beg, *end;
frag = first_frag_for_seg (s->seg);
beg = symbol_temp_new (s->seg, 0, frag);
s->text_start = beg;
frag = last_frag_for_seg (s->seg);
end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag);
s->text_end = end;
expr.X_op = O_symbol;
expr.X_add_symbol = beg;
expr.X_add_number = 0;
emit_expr (&expr, addr_size);
expr.X_op = O_symbol;
expr.X_add_symbol = end;
expr.X_add_number = 0;
emit_expr (&expr, addr_size);
}
/* End of Range Entry. */
for (i = 0; i < addr_size; i++)
out_byte (0);
for (i = 0; i < addr_size; i++)
out_byte (0);
}
/* Emit data for .debug_aranges. */
static void
@ -1382,6 +1428,13 @@ out_debug_abbrev (segT abbrev_seg)
out_abbrev (DW_AT_low_pc, DW_FORM_addr);
out_abbrev (DW_AT_high_pc, DW_FORM_addr);
}
else
{
if (DWARF2_FORMAT () == dwarf2_format_32bit)
out_abbrev (DW_AT_ranges, DW_FORM_data4);
else
out_abbrev (DW_AT_ranges, DW_FORM_data8);
}
out_abbrev (DW_AT_name, DW_FORM_string);
out_abbrev (DW_AT_comp_dir, DW_FORM_string);
out_abbrev (DW_AT_producer, DW_FORM_string);
@ -1395,7 +1448,7 @@ out_debug_abbrev (segT abbrev_seg)
/* Emit a description of this compilation unit for .debug_info. */
static void
out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg)
out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg)
{
char producer[128];
char *comp_dir;
@ -1458,8 +1511,7 @@ out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg)
/* ??? sizeof_offset */
TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), 4);
/* These two attributes may only be emitted if all of the code is
contiguous. Multiple sections are not that. */
/* These two attributes are emitted if all of the code is contiguous. */
if (all_segs->next == NULL)
{
/* DW_AT_low_pc */
@ -1474,6 +1526,16 @@ out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg)
expr.X_add_number = 0;
emit_expr (&expr, sizeof_address);
}
else
{
/* This attributes is emitted if the code is disjoint. */
/* DW_AT_ranges */
expr.X_op = O_symbol;
expr.X_add_symbol = section_symbol (ranges_seg);
expr.X_add_number = 0;
emit_expr (&expr, sizeof_address);
}
/* DW_AT_name. We don't have the actual file name that was present
on the command line, so assume files[1] is the main input file.
@ -1564,6 +1626,7 @@ dwarf2_finish (void)
{
segT abbrev_seg;
segT aranges_seg;
segT ranges_seg;
assert (all_segs);
@ -1580,8 +1643,19 @@ dwarf2_finish (void)
record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1);
if (all_segs->next == NULL)
ranges_seg = NULL;
else
{
ranges_seg = subseg_new (".debug_ranges", 0);
bfd_set_section_flags (stdoutput, ranges_seg,
SEC_READONLY | SEC_DEBUGGING);
record_alignment (ranges_seg, ffs (2 * sizeof_address) - 1);
out_debug_ranges (ranges_seg);
}
out_debug_aranges (aranges_seg, info_seg);
out_debug_abbrev (abbrev_seg);
out_debug_info (info_seg, abbrev_seg, line_seg);
out_debug_info (info_seg, abbrev_seg, line_seg, ranges_seg);
}
}