MIPS: Allow the auxv's elf_platform entry to be set.
The userspace runtime linker uses the elf_platform to find the libraries
optimized for the current CPU archecture variant. First we need to allow it
to be set to something other than NULL. Follow-on patches will set some
values for specific CPUs.
GLIBC already does the right thing. The kernel just needs to supply good
data.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/891/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/include/asm/elf.h b/arch/mips/include/asm/elf.h
index 7a6a35d..e53d7be 100644
--- a/arch/mips/include/asm/elf.h
+++ b/arch/mips/include/asm/elf.h
@@ -334,14 +334,14 @@
#define ELF_HWCAP (0)
-/* This yields a string that ld.so will use to load implementation
- specific libraries for optimization. This is more specific in
- intent than poking at uname or /proc/cpuinfo.
+/*
+ * This yields a string that ld.so will use to load implementation
+ * specific libraries for optimization. This is more specific in
+ * intent than poking at uname or /proc/cpuinfo.
+ */
- For the moment, we have only optimizations for the Intel generations,
- but that could change... */
-
-#define ELF_PLATFORM (NULL)
+#define ELF_PLATFORM __elf_platform
+extern const char *__elf_platform;
/*
* See comments in asm-alpha/elf.h, this is the same thing
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 1773544..494e8ab 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -926,6 +926,7 @@
}
const char *__cpu_name[NR_CPUS];
+const char *__elf_platform;
__cpuinit void cpu_probe(void)
{