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[CVE-2009-0029] powerpc: Enable syscall wrappers for 64-bit

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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>
This commit is contained in:
Benjamin Herrenschmidt 2009-01-14 14:14:00 +01:00 committed by Heiko Carstens
parent 1a94bc3476
commit ee6a093222
2 changed files with 7 additions and 0 deletions
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1
arch/powerpc/Kconfig
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@ -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

6
include/linux/syscalls.h
View File

@ -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