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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/elfxx-target.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/elfxx-target.h')
| -rw-r--r-- | bfd/elfxx-target.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/bfd/elfxx-target.h b/bfd/elfxx-target.h index 00252ce..d063fb7 100644 --- a/bfd/elfxx-target.h +++ b/bfd/elfxx-target.h @@ -114,6 +114,9 @@ #ifndef elf_backend_want_p_paddr_set_to_zero #define elf_backend_want_p_paddr_set_to_zero 0 #endif +#ifndef elf_backend_no_page_alias +#define elf_backend_no_page_alias 0 +#endif #ifndef elf_backend_default_execstack #define elf_backend_default_execstack 1 #endif @@ -860,6 +863,7 @@ static struct elf_backend_data elfNN_bed = elf_backend_want_dynbss, elf_backend_want_dynrelro, elf_backend_want_p_paddr_set_to_zero, + elf_backend_no_page_alias, elf_backend_default_execstack, elf_backend_caches_rawsize, elf_backend_extern_protected_data |