Commit b60d5db6 authored by Mark Rutland's avatar Mark Rutland Committed by Russell King

ARM: 7786/1: hyp: fix macro parameterisation

Currently, compare_cpu_mode_with_primary uses a mixture of macro
arguments and hardcoded registers, and does so incorrectly, as it
stores (__boot_cpu_mode_offset | BOOT_CPU_MODE_MISMATCH) to
(__boot_cpu_mode + &__boot_cpu_mode_offset), which could corrupt an
arbitrary portion of memory.

This patch fixes up compare_cpu_mode_with_primary to use the macro
arguments, correctly updating __boot_cpu_mode.
Signed-off-by: default avatarMark Rutland <mark.rutland@arm.com>
Acked-by: default avatarDave Martin <Dave.Martin@arm.com>
Acked-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <cdall@cs.columbia.edu>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent c65b7e98
......@@ -56,8 +56,8 @@ ENTRY(__boot_cpu_mode)
ldr \reg3, [\reg2]
ldr \reg1, [\reg2, \reg3]
cmp \mode, \reg1 @ matches primary CPU boot mode?
orrne r7, r7, #BOOT_CPU_MODE_MISMATCH
strne r7, [r5, r6] @ record what happened and give up
orrne \reg1, \reg1, #BOOT_CPU_MODE_MISMATCH
strne \reg1, [\reg2, \reg3] @ record what happened and give up
.endm
#else /* ZIMAGE */
......
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