Commit ee6a0932 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Heiko Carstens
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[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: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
parent 1a94bc34

arch/powerpc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

include/linux/syscalls.h

+6 −0
Original line number Diff line number Diff line
@@ -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