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| author | Alan Modra <amodra@gmail.com> | 2017-02-14 10:45:51 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2017-02-16 23:09:38 +1030 |
| commit | a8c75b765e57aaebb99d4e32e0f228835cff2737 (patch) | |
| tree | 2cea5382768b3cae9de0e04d151a7313d1024e77 /bfd/elf-bfd.h | |
| parent | 247d6c4c14769b7576d810a381a68e35388ee874 (diff) | |
| download | gdb-a8c75b765e57aaebb99d4e32e0f228835cff2737.zip gdb-a8c75b765e57aaebb99d4e32e0f228835cff2737.tar.gz gdb-a8c75b765e57aaebb99d4e32e0f228835cff2737.tar.bz2 | |
hppa -z relro again
I misunderstood the hppa alias problem. File offsets of segments need
to be such that no page is mapped twice with different permissions.
(Which still seems to me like something the kernel could fix, but
anyhow, this is not so difficult to achieve in ld.)
PR 21000
bfd/
* elf-bfd.h (struct elf_backend_data): Add no_page_alias.
* elfxx-target.h (elf_backend_no_page_alias): Define.
(elfNN_bed): Init new field.
* elf.c (assign_file_positions_for_load_sections): If no_page_alias
ensure PT_LOAD segment starts on a new page.
* elf32-hppa.c (elf_backend_no_page_alias): Define.
ld/
* testsuite/ld-elf/loadaddr1.d: Adjust for hppa file offsets.
* testsuite/ld-elf/loadaddr2.d: Likewise.
* testsuite/ld-elf/loadaddr3a.d: Likewise.
* testsuite/ld-scripts/rgn-at5.d: Likewise.
Diffstat (limited to 'bfd/elf-bfd.h')
| -rw-r--r-- | bfd/elf-bfd.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h index 9ea763a..f5a8d75 100644 --- a/bfd/elf-bfd.h +++ b/bfd/elf-bfd.h @@ -1461,6 +1461,10 @@ struct elf_backend_data This field indicates whether this behavior is required. */ unsigned want_p_paddr_set_to_zero : 1; + /* Target has broken hardware and/or kernel that requires pages not + to be mapped twice with different permissions. */ + unsigned no_page_alias : 1; + /* True if an object file lacking a .note.GNU-stack section should be assumed to be requesting exec stack. At least one other file in the link needs to have a .note.GNU-stack section |