From 9115d13453dee22473a1e8cacc90a8d64a9c4bc9 Mon Sep 17 00:00:00 2001 From: Nathan Lynch Date: Wed, 16 Jul 2008 09:58:51 +1000 Subject: 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 Signed-off-by: Benjamin Herrenschmidt --- include/asm-powerpc/cputable.h | 2 ++ include/asm-powerpc/elf.h | 8 ++++++++ 2 files changed, 10 insertions(+) (limited to 'include') diff --git a/include/asm-powerpc/cputable.h b/include/asm-powerpc/cputable.h index 2a3e9075a5a..ef8a248dfd5 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 89664675b46..80d1f399ee5 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; \ -- cgit v1.2.3