------- Additional Comments From danglin at gcc dot gnu dot org 2007-12-30
02:39 -------
It appears this commit broke eh on hppa-linux:
CVSROOT: /cvs/src
Module name: src
Changes by: [EMAIL PROTECTED] 2007-12-15 09:34:48
Modified files:
bfd : ChangeLog ecoff.c elf-bfd.h elf-eh-frame.c
elflink.c section.c
Log message:
bfd/
* elf-bfd.h (eh_cie_fde): Add u.fde.next_for_section and
u.cie.gc_mark.
(bfd_elf_section_data): Add fde_list.
(elf_fde_list): New macro.
(elf_obj_tdata): Add eh_frame_section.
(elf_eh_frame_section): New macro.
(_bfd_elf_gc_mark_reloc): Remove last parameter.
(_bfd_elf_gc_mark_fdes): Declare.
* elf-eh-frame.c (_bfd_elf_get_eh_frame_sec_info): Chain the FDEs
for each input section.
(mark_entry, _bfd_elf_gc_mark_fdes): New functions.
* elflink.c (_bfd_elf_gc_mark_reloc): Remove is_eh parameter.
(_bfd_elf_gc_mark): Update call accordingly. Mark the relocations
againts the section's FDEs. Don't mark the bfd's elf_eh_frame_section.
(bfd_elf_gc_sections): Parse each input bfd's .eh_frame before
marking any input sections. Remove the current EH handling.
* section.c (bfd_section): Remove gc_mark_from_eh.
* ecoff.c (bfd_debug_section): Update initializer accordingly.
It's probably the unusal encoding (the only one that I could find that
allowed a eh frame header table given available relocation support):
/* This macro chooses the encoding of pointers embedded in the exception
handling sections. If at all possible, this should be defined such
that the exception handling section will not require dynamic relocations,
and so may be read-only.
Because the HP assembler auto aligns, it is necessary to use
DW_EH_PE_aligned. It's not possible to make the data read-only
on the HP-UX SOM port since the linker requires fixups for label
differences in different sections to be word aligned. However,
the SOM linker can do unaligned fixups for absolute pointers.
We also need aligned pointers for global and function pointers.
Although the HP-UX 64-bit ELF linker can handle unaligned pc-relative
fixups, the runtime doesn't have a consistent relationship between
text and data for dynamically loaded objects. Thus, it's not possible
to use pc-relative encoding for pointers on this target. It may be
possible to use segment relative encodings but GAS doesn't currently
have a mechanism to generate these encodings. For other targets, we
use pc-relative encoding for pointers. If the pointer might require
dynamic relocation, we make it indirect. */
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
(TARGET_GAS && !TARGET_HPUX \
? (DW_EH_PE_pcrel \
| ((GLOBAL) || (CODE) == 2 ? DW_EH_PE_indirect : 0) \
| (TARGET_64BIT ? DW_EH_PE_sdata8 : DW_EH_PE_sdata4)) \
: (!TARGET_GAS || (GLOBAL) || (CODE) == 2 \
? DW_EH_PE_aligned : DW_EH_PE_absptr))
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |rsandifo at sourceware dot
| |org
http://sourceware.org/bugzilla/show_bug.cgi?id=5526
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