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authorJohn Rigby <john.rigby@linaro.org>2011-10-21 11:34:34 -0600
committerJohn Rigby <john.rigby@linaro.org>2012-12-06 12:16:41 -0700
commitb3fdb8fe9fe5480d4436a8ca49c76b93c2254a3d (patch)
tree21068423917dc7f7db8e3380114c713f6aa2ac37 /arch
parent66f4a3644d0df3f96b26263e854cb4c47f30ea7d (diff)
downloadu-boot-linaro-stable-b3fdb8fe9fe5480d4436a8ca49c76b93c2254a3d.tar.gz
OMAP4: avoid null pointer access in save_boot_params
When booting via spl the parameter layout is apparently different and this leads to following bad pointers. For now just work around the issue by checking pointers before following them. Signed-off-by: John Rigby <john.rigby@linaro.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/cpu/armv7/omap-common/lowlevel_init.S6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/omap-common/lowlevel_init.S b/arch/arm/cpu/armv7/omap-common/lowlevel_init.S
index 358107776..d5b2ed466 100644
--- a/arch/arm/cpu/armv7/omap-common/lowlevel_init.S
+++ b/arch/arm/cpu/armv7/omap-common/lowlevel_init.S
@@ -66,7 +66,13 @@ ENTRY(save_boot_params)
bgt 2f
/* Store the boot mode (raw/FAT) in omap_bootmode */
ldr r2, [r0, #DEV_DESC_PTR_OFFSET] @ get the device descriptor ptr
+ bic r3, r2, #255
+ cmp r3, #0
+ beq 1f
ldr r2, [r2, #DEV_DATA_PTR_OFFSET] @ get the pDeviceData ptr
+ bic r3, r2, #255
+ cmp r3, #0
+ beq 1f
ldr r2, [r2, #BOOT_MODE_OFFSET] @ get the boot mode
ldr r3, =omap_bootmode
str r2, [r3]