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Subject[patch 28/85] [PATCH 08/44] [CVE-2009-0029] powerpc: Enable syscall wrappers for 64-bit
2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Benjamin Herrenschmidt <benh@kernel.crashing.org>

commit ee6a093222549ac0c72cfd296c69fa5e7d6daa34 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
arch/powerpc/Kconfig | 1 +
include/linux/syscalls.h | 6 ++++++
2 files changed, 7 insertions(+)

--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -122,6 +122,7 @@ 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
--- 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



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