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| author | Alan Modra <amodra@gmail.com> | 2014-02-08 12:26:53 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2014-02-09 23:25:14 +1030 |
| commit | 53291d1f1601d6958248dcfb755af470521c186a (patch) | |
| tree | 6c7d8b35b6792238cc852ff9e3866f154c77f8e2 /bfd/elf-bfd.h | |
| parent | f9e7e5d3e6b8715d702cf0d530e8ca6cd243cd8b (diff) | |
| download | gdb-53291d1f1601d6958248dcfb755af470521c186a.zip gdb-53291d1f1601d6958248dcfb755af470521c186a.tar.gz gdb-53291d1f1601d6958248dcfb755af470521c186a.tar.bz2 | |
powerpc relax_section and section contents cache
This patch provides a means for backend relax_section support to
increase the size of a section without needing to reallocate
section contents. This helps reduce memory usage when the added space
does not need to be written in relax_section, as is the case for
powerpc. Writing the stubs later means a few tweaks are needed in the
powerpc relocate_section function, but also removes some code
duplication since the extra ld -r relocs can be written there too.
* elf-bfd.h (struct elf_backend_data): Add caches_rawsize.
* elfxx-target.h (elf_backend_caches_rawsize): Define.
(elfNN_bed): Init new field.
* elflink.c (elf_link_input_bfd): Handle caches_rawsize.
* elf32-ppc.c (shared_stub_entry): Zero addi offset.
(ppc_elf_relax_section): Don't reallocate section here, write
stubs, or write out relocs for ld -r here..
(ppc_elf_relocate_section): ..instead write stubs here, and use
existing code to write out relocs for ld -r. Fix offset
adjustment on reloc for little-endian.
(elf_backend_caches_rawsize): Define.
Diffstat (limited to 'bfd/elf-bfd.h')
| -rw-r--r-- | bfd/elf-bfd.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h index 0aab5fa..76cac2f 100644 --- a/bfd/elf-bfd.h +++ b/bfd/elf-bfd.h @@ -1342,6 +1342,11 @@ struct elf_backend_data other file in the link needs to have a .note.GNU-stack section for a PT_GNU_STACK segment to be created. */ unsigned default_execstack : 1; + + /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize + in length rather than sec->size in length, if sec->rawsize is + non-zero and smaller than sec->size. */ + unsigned caches_rawsize : 1; }; /* Information about reloc sections associated with a bfd_elf_section_data |