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| author | Nick Kralevich <nnk@google.com> | 2012-02-28 10:40:00 -0800 |
|---|---|---|
| committer | Nick Kralevich <nnk@google.com> | 2012-03-05 16:44:42 -0800 |
| commit | 9ec0f03a0d0b17bbb94ac0b9fef6add28a133c3a (patch) | |
| tree | dde5e86b6ae51f92087a9034750c282e11884164 /libc | |
| parent | 1fe109ecf3b1acd10d55091f3e0eed7efeca98f1 (diff) | |
| download | android_bionic-9ec0f03a0d0b17bbb94ac0b9fef6add28a133c3a.tar.gz android_bionic-9ec0f03a0d0b17bbb94ac0b9fef6add28a133c3a.tar.bz2 android_bionic-9ec0f03a0d0b17bbb94ac0b9fef6add28a133c3a.zip | |
Add relro support
Add support for PT_GNU_RELRO. This allows the static linker to
indicate that certain regions of memory should be marked as
"read-only" after dynamic linking is complete.
See:
* http://www.akkadia.org/drepper/nonselsec.pdf (section 6)
* http://tk-blog.blogspot.com/2009/02/relro-not-so-well-known-memory.html
Note that this change has no effect on Android right now, because
we don't compile our code with relro enabled.
Change-Id: I6541f8775367e8558b4388f7d105b1ae6e8f046b
Diffstat (limited to 'libc')
| -rw-r--r-- | libc/include/sys/exec_elf.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libc/include/sys/exec_elf.h b/libc/include/sys/exec_elf.h index 03bbdac5e..eecbd647a 100644 --- a/libc/include/sys/exec_elf.h +++ b/libc/include/sys/exec_elf.h @@ -130,4 +130,6 @@ #define STT_LOPROC 13 /* reserved range for processor */ #define STT_HIPROC 15 /* specific symbol types */ +#define PT_GNU_RELRO 0x6474e552 /* Read-only post relocation */ + #endif /* _SYS_EXEC_ELF_H_ */ |