Use the kernel's MAX_ERRNO in the syscall stubs.
Bug: http://code.google.com/p/android/issues/detail?id=53104
Change-Id: Iaabf7025b153e96dc5eca231a33a32d4cb7d8116
diff --git a/libc/arch-arm/bionic/tgkill.S b/libc/arch-arm/bionic/tgkill.S
index da5c0af..60df9e6 100644
--- a/libc/arch-arm/bionic/tgkill.S
+++ b/libc/arch-arm/bionic/tgkill.S
@@ -33,6 +33,7 @@
of a corrupted malloc heap).
*/
+#include <linux/err.h>
#include <sys/linux-syscalls.h>
#include <machine/asm.h>
@@ -45,7 +46,8 @@
ldr r7, =__NR_tgkill
swi #0
ldmfd sp!, {r4-r7, ip, lr}
- movs r0, r0
- bxpl lr
- b __set_syscall_errno
+ cmn r0, #(MAX_ERRNO + 1)
+ bxls lr
+ neg r0, r0
+ b __set_errno
END(tgkill)