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* dwarf2-frame.c (struct comp_unit): Add member `dbase'.

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(read_encoded_value): Handle DW_EH_PE_datarel encoding.
(dwarf2_build_frame_info): Set base for DW_EH_PE_datarel encodings
when handling .eh_frame sections.
This commit is contained in:
Mark Kettenis
2003-06-04 21:03:23 +00:00
parent 4e37032562
commit 0912c7f2c2
2 changed files with 24 additions and 0 deletions
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17
gdb/dwarf2-frame.c
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@@ -747,6 +747,9 @@ struct comp_unit
/* Pointer to the .debug_frame section. */
asection *dwarf_frame_section;
/* Base for DW_EH_PE_datarel encodings. */
bfd_vma dbase;
};
static unsigned int
@@ -916,6 +919,9 @@ read_encoded_value (struct comp_unit *unit, unsigned char encoding,
base = bfd_get_section_vma (unit->bfd, unit->dwarf_frame_section);
base += (buf - unit->dwarf_frame_buffer);
break;
case DW_EH_PE_datarel:
base = unit->dbase;
break;
default:
internal_error (__FILE__, __LINE__, "Invalid or unsupported encoding");
}
@@ -1251,11 +1257,14 @@ dwarf2_build_frame_info (struct objfile *objfile)
unit.abfd = objfile->obfd;
unit.objfile = objfile;
unit.addr_size = objfile->obfd->arch_info->bits_per_address / 8;
unit.dbase = 0;
/* First add the information from the .eh_frame section. That way,
the FDEs from that section are searched last. */
if (dwarf_eh_frame_offset)
{
asection *got;
unit.cie = NULL;
unit.dwarf_frame_buffer = dwarf2_read_section (objfile,
dwarf_eh_frame_offset,
@@ -1265,6 +1274,14 @@ dwarf2_build_frame_info (struct objfile *objfile)
unit.dwarf_frame_size = dwarf_eh_frame_size;
unit.dwarf_frame_section = dwarf_eh_frame_section;
/* FIXME: kettenis/20030602: This is the DW_EH_PE_datarel base
that for the i386/amd64 target, which currently is the only
target in GCC that supports/uses the DW_EH_PE_datarel
encoding. */
got = bfd_get_section_by_name (unit.abfd, ".got");
if (got)
unit.dbase = got->vma;
frame_ptr = unit.dwarf_frame_buffer;
while (frame_ptr < unit.dwarf_frame_buffer + unit.dwarf_frame_size)
frame_ptr = decode_frame_entry (&unit, frame_ptr, 1);