diff options
| author |   Nathan Lynch <ntl@pobox.com> | 2008-07-16 09:58:51 +1000 |
|---|---|---|
| committer |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-25 15:44:39 +1000 |
| commit | 9115d13453dee22473a1e8cacc90a8d64a9c4bc9 (patch) | |
| tree | dc6c7b1aad8861ae5f88aaf496fd634338686330 /include/asm-powerpc | |
| parent | ELF loader support for auxvec base platform string (diff) | |
| download | linux-dev-9115d13453dee22473a1e8cacc90a8d64a9c4bc9.tar.xz linux-dev-9115d13453dee22473a1e8cacc90a8d64a9c4bc9.zip | |
powerpc: Enable AT_BASE_PLATFORM aux vector
Stash the first platform string matched by identify_cpu() in
powerpc_base_platform, and supply that to the ELF loader for the value
of AT_BASE_PLATFORM.
Signed-off-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'include/asm-powerpc')
| -rw-r--r-- | include/asm-powerpc/cputable.h | 2 | ||||
| -rw-r--r-- | include/asm-powerpc/elf.h | 8 |
2 files changed, 10 insertions, 0 deletions
diff --git a/include/asm-powerpc/cputable.h b/include/asm-powerpc/cputable.h index 2a3e9075a5a0..ef8a248dfd55 100644 --- a/include/asm-powerpc/cputable.h +++ b/include/asm-powerpc/cputable.h @@ -127,6 +127,8 @@ extern struct cpu_spec *identify_cpu(unsigned long offset, unsigned int pvr); extern void do_feature_fixups(unsigned long value, void *fixup_start, void *fixup_end); +extern const char *powerpc_base_platform; + #endif /* __ASSEMBLY__ */ /* CPU kernel features */ diff --git a/include/asm-powerpc/elf.h b/include/asm-powerpc/elf.h index 89664675b469..80d1f399ee51 100644 --- a/include/asm-powerpc/elf.h +++ b/include/asm-powerpc/elf.h @@ -217,6 +217,14 @@ typedef elf_vrregset_t elf_fpxregset_t; #define ELF_PLATFORM (cur_cpu_spec->platform) +/* While ELF_PLATFORM indicates the ISA supported by the platform, it + * may not accurately reflect the underlying behavior of the hardware + * (as in the case of running in Power5+ compatibility mode on a + * Power6 machine). ELF_BASE_PLATFORM allows ld.so to load libraries + * that are tuned for the real hardware. + */ +#define ELF_BASE_PLATFORM (powerpc_base_platform) + #ifdef __powerpc64__ # define ELF_PLAT_INIT(_r, load_addr) do { \ _r->gpr[2] = load_addr; \ |