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Add support for decoding DWARF v5 DW_AT_addr_base tags.

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* dwarf.c (display_debug_addr): Handle dwarf-5 .debug_addr bits.
This commit is contained in:
Tom de Vries 2021-02-26 15:52:39 +00:00 • committed by Nick Clifton
parent f821878623
commit 0e12f6c802
2 changed files with 40 additions and 3 deletions
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4
binutils/ChangeLog
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@ -1,3 +1,7 @@
2021-02-26 Tom de Vries <tdevries@suse.de>
* dwarf.c (display_debug_addr): Handle dwarf-5 .debug_addr bits.
2021-02-26 Tom de Vries <tdevries@suse.de>
PR 27390

37
binutils/dwarf.c
View file

@ -6063,8 +6063,8 @@ display_debug_macro (struct dwarf_section *section,
SAFE_BYTE_GET_AND_INC (version, curr, 2, end);
if (version != 4 && version != 5)
{
error (_("Only GNU extension to DWARF 4 or 5 of %s is currently supported.\n"),
section->name);
error (_("Expected to find a version number of 4 or 5 in section %s but found %d instead\n"),
section->name, version);
return 0;
}
@ -7416,6 +7416,7 @@ display_debug_addr (struct dwarf_section *section,
unsigned char *end;
unsigned int i;
unsigned int count;
unsigned char * header;
if (section->size == 0)
{
@ -7456,6 +7457,7 @@ display_debug_addr (struct dwarf_section *section,
debug_addr_info [count]->addr_base = section->size;
qsort (debug_addr_info, count, sizeof (debug_info *), comp_addr_base);
header = section->start;
for (i = 0; i < count; i++)
{
unsigned int idx;
@ -7466,7 +7468,38 @@ display_debug_addr (struct dwarf_section *section,
printf (_("\tIndex\tAddress\n"));
entry = section->start + debug_addr_info [i]->addr_base;
if (debug_addr_info [i]->dwarf_version >= 5)
{
size_t header_size = entry - header;
unsigned char * curr_header = header;
dwarf_vma length;
int version;
int segment_selector_size;
if (header_size != 8 && header_size != 16)
{
warn (_("Corrupt %s section: expecting header size of 8 or 16, but found %ld instead\n"),
section->name, (long) header_size);
return 0;
}
SAFE_BYTE_GET_AND_INC (length, curr_header, 4, entry);
if (length == 0xffffffff)
SAFE_BYTE_GET (length, curr_header, 8, entry);
end = curr_header + length;
SAFE_BYTE_GET_AND_INC (version, curr_header, 2, entry);
if (version != 5)
warn (_("Corrupt %s section: expecting version number 5 in header but found %d instead\n"),
section->name, version);
SAFE_BYTE_GET_AND_INC (address_size, curr_header, 1, entry);
SAFE_BYTE_GET_AND_INC (segment_selector_size, curr_header, 1, entry);
address_size += segment_selector_size;
}
else
end = section->start + debug_addr_info [i + 1]->addr_base;
header = end;
idx = 0;
while (entry < end)
{