Messages in this thread Patch in this message | | | Date | Thu, 15 Jan 2009 13:59:52 -0800 | From | Greg KH <> | Subject | [patch 28/85] [PATCH 08/44] [CVE-2009-0029] powerpc: Enable syscall wrappers for 64-bit |
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2.6.27-stable review patch. If anyone has any objections, please let us know.
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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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