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arm: Fix setjmp (again)

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Commit e677724 (arm: Fix setjmp) added code to fix compilation of the setjmp
code path with thumv1. Unfortunately it missed a constraint that the adr
instruction can only refer to 4 byte aligned offsets.

So this patch adds the required alignment hooks to make compilation
work again even when setjmp doesn't happen to be 4 byte aligned.

Signed-off-by: Alexander Graf <agraf@suse.de>
Tested-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Alexander Graf 2016-07-05 20:37:17 +02:00 committed by Tom Rini
parent 59d07ee08e
commit 0de02de768
1 changed files with 3 additions and 1 deletions
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4
arch/arm/include/asm/setjmp.h
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@ -43,6 +43,7 @@ static inline int setjmp(jmp_buf jmp)
#else
asm volatile(
#ifdef CONFIG_SYS_THUMB_BUILD
".align 2\n"
"adr r0, jmp_target\n"
"add r0, r0, $1\n"
#else
@ -52,7 +53,8 @@ static inline int setjmp(jmp_buf jmp)
"mov r2, sp\n"
"stm r1!, {r0, r2, r4, r5, r6, r7}\n"
"b 2f\n"
"jmp_target: "
".align 2\n"
"jmp_target: \n"
"mov %0, #1\n"
"2:\n"
: "+l" (r)