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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-01-14 14:14:00 +0100
committerHeiko Carstens <heiko.carstens@de.ibm.com>2009-01-14 14:15:17 +0100
commitee6a093222549ac0c72cfd296c69fa5e7d6daa34 (patch)
tree8f1788edc08009b80ee299b843cdc7bf3ac4bcdc
parent1a94bc34768e463a93cb3751819709ab0ea80a01 (diff)
[CVE-2009-0029] powerpc: Enable syscall wrappers for 64-bit
This enables the use of syscall wrappers to do proper sign extension for 64-bit programs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
-rw-r--r--arch/powerpc/Kconfig1
-rw-r--r--include/linux/syscalls.h6
2 files changed, 7 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 84b861316ce7..e39b73bc0ff8 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -123,6 +123,7 @@ config PPC
select HAVE_DMA_ATTRS if PPC64
select USE_GENERIC_SMP_HELPERS if SMP
select HAVE_OPROFILE
+ select HAVE_SYSCALL_WRAPPERS if PPC64
config EARLY_PRINTK
bool
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 0bb537d7ba2e..90aa5eba87a2 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -103,8 +103,14 @@ struct old_linux_dirent;
#define SYSCALL_DEFINE5(...) SYSCALL_DEFINEx(5, __VA_ARGS__)
#define SYSCALL_DEFINE6(...) SYSCALL_DEFINEx(6, __VA_ARGS__)
+#ifdef CONFIG_PPC64
+#define SYSCALL_ALIAS(alias, name) \
+ asm ("\t.globl " #alias "\n\t.set " #alias ", " #name "\n" \
+ "\t.globl ." #alias "\n\t.set ." #alias ", ." #name)
+#else
#define SYSCALL_ALIAS(alias, name) \
asm ("\t.globl " #alias "\n\t.set " #alias ", " #name)
+#endif
#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS