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2002-05-22 Michal Ludvig <mludvig@suse.cz>

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* dwarf2cfi.c (frame_state_for): Added safety check for a valid
	fde->cie_ptr.
	(dwarf2_build_frame_info): Corrected handling of eh_frame.
	(dwarf2_build_frame_info): Add offset to fde->initial_location
	so that frames of shared libraries are mapped correctly.
This commit is contained in:
Michal Ludvig 2002-05-22 12:34:08 +00:00
parent d5de0a84ca
commit 005ef3d2e3
2 changed files with 45 additions and 10 deletions
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8
gdb/ChangeLog
View File

@ -1,3 +1,11 @@
2002-05-22 Michal Ludvig <mludvig@suse.cz>
* dwarf2cfi.c (frame_state_for): Added safety check for a valid
fde->cie_ptr.
(dwarf2_build_frame_info): Corrected handling of eh_frame.
(dwarf2_build_frame_info): Add offset to fde->initial_location
so that frames of shared libraries are mapped correctly.
2002-05-22 Jason Thorpe <thorpej@wasabisystems.com>
* config/alpha/tm-nbsd.h: Include solib.h.

47
gdb/dwarf2cfi.c
View File

@ -802,11 +802,17 @@ frame_state_for (struct context *context, struct frame_state *fs)
context->args_size = 0;
context->lsda = 0;
if ((fde = get_fde_for_addr (context->ra - 1)) != NULL)
{
fs->pc = fde->initial_location;
fde = get_fde_for_addr (context->ra - 1);
if (fde == NULL)
return;
fs->pc = fde->initial_location;
if (fde->cie_ptr)
{
cie = fde->cie_ptr;
fs->code_align = cie->code_align;
fs->data_align = cie->data_align;
fs->retaddr_column = cie->ra;
@ -817,7 +823,11 @@ frame_state_for (struct context *context, struct frame_state *fs)
cie->data + cie->data_length, context, fs);
execute_cfa_program (cie->objfile, fde->data,
fde->data + fde->data_length, context, fs);
}
}
else
internal_error (__FILE__, __LINE__,
"%s(): Internal error: fde->cie_ptr==NULL !",
__func__);
}
static void
@ -1367,6 +1377,7 @@ dwarf2_build_frame_info (struct objfile *objfile)
bfd *abfd = objfile->obfd;
char *start = NULL;
char *end = NULL;
int from_eh = 0;
obstack_init (&unwind_tmp_obstack);
@ -1389,6 +1400,8 @@ dwarf2_build_frame_info (struct objfile *objfile)
start = dwarf_frame_buffer;
end = dwarf_frame_buffer + dwarf_eh_frame_size;
from_eh = 1;
}
if (start)
@ -1410,7 +1423,7 @@ dwarf2_build_frame_info (struct objfile *objfile)
cie_id = read_length (abfd, start, &bytes_read, dwarf64);
start += bytes_read;
if (is_cie (cie_id, dwarf64))
if ((from_eh && cie_id == 0) || is_cie (cie_id, dwarf64))
{
struct cie_unit *cie = cie_unit_alloc ();
char *aug;
@ -1461,7 +1474,7 @@ dwarf2_build_frame_info (struct objfile *objfile)
aug += 1;
}
else
warning ("unknown augmentation");
warning ("%s(): unknown augmentation", __func__);
}
cie->data = start;
@ -1476,13 +1489,27 @@ dwarf2_build_frame_info (struct objfile *objfile)
fde = fde_unit_alloc ();
fde_chunks.array[fde_chunks.elems++] = fde;
fde->initial_location = read_pointer (abfd, &start);
fde->initial_location = read_pointer (abfd, &start)
+ ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
fde->address_range = read_pointer (abfd, &start);
for (cie = cie_chunks;
cie && (cie->offset != cie_id); cie = cie->next);
cie = cie_chunks;
while(cie)
{
if (cie->objfile == objfile)
{
if (from_eh && (cie->offset == (unit_offset + bytes_read - cie_id)))
break;
if (!from_eh && (cie->offset == cie_id))
break;
}
cie = cie->next;
}
if (!cie)
error ("dwarf cfi error: can't find CIE pointer");
error ("%s(): can't find CIE pointer", __func__);
fde->cie_ptr = cie;
if (cie->augmentation[0] == 'z')