ARM: 7065/1: kexec: ensure new kernel is entered in ARM state

Commit 540b5738 ("ARM: 6999/1: head, zImage: Always Enter the kernel in
ARM state") mandates that the kernel should be entered in ARM state.

If a Thumb-2 kernel kexecs a new kernel image, we need to ensure that
we change state when branching to the new code. This patch replaces a
mov pc, lr with a bx lr on Thumb-2 kernels so that we transition to ARM
state if need be.

Reviewed-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Will Deacon 2011-08-26 16:32:57 +01:00 коммит произвёл Russell King
Родитель 0ebb962e00
Коммит 552e0c8da8
1 изменённых файлов: 2 добавлений и 1 удалений

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@ -57,7 +57,8 @@ relocate_new_kernel:
mov r0,#0
ldr r1,kexec_mach_type
ldr r2,kexec_boot_atags
mov pc,lr
ARM( mov pc, lr )
THUMB( bx lr )
.align