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authorLaura Abbott <lauraa@codeaurora.org>2011-10-06 21:53:14 +0200
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-10-17 10:13:42 +0200
commit01885bc5ce5a58e043e00f3f295301ef1b9a0fc4 (patch)
tree16194eb2f035e2594da9bef259fb89adf566256c /arch
parentARM: 7120/1: remove bashism in check for multiple zreladdrs (diff)
downloadlinux-01885bc5ce5a58e043e00f3f295301ef1b9a0fc4.tar.xz
linux-01885bc5ce5a58e043e00f3f295301ef1b9a0fc4.zip
ARM: 7125/1: Add unwinding annotations for 64bit division functions
The 64bit division functions never had unwinding annotations added. This prevents a backtrace from being printed within the function and if a division by 0 occurs. Add the annotations. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/lib/div64.S8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/lib/div64.S b/arch/arm/lib/div64.S
index faa7748142da..e55c4842c290 100644
--- a/arch/arm/lib/div64.S
+++ b/arch/arm/lib/div64.S
@@ -13,6 +13,7 @@
*/
#include <linux/linkage.h>
+#include <asm/unwind.h>
#ifdef __ARMEB__
#define xh r0
@@ -44,6 +45,7 @@
*/
ENTRY(__do_div64)
+UNWIND(.fnstart)
@ Test for easy paths first.
subs ip, r4, #1
@@ -189,7 +191,12 @@ ENTRY(__do_div64)
moveq yh, xh
moveq xh, #0
moveq pc, lr
+UNWIND(.fnend)
+UNWIND(.fnstart)
+UNWIND(.pad #4)
+UNWIND(.save {lr})
+Ldiv0_64:
@ Division by 0:
str lr, [sp, #-8]!
bl __div0
@@ -200,4 +207,5 @@ ENTRY(__do_div64)
mov xh, #0
ldr pc, [sp], #8
+UNWIND(.fnend)
ENDPROC(__do_div64)