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avr32/lib: fix unaligned memcpy()

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memcpy(p, unaligned, 4..) returns (p + num_of_unaligned_by_copied)
instead of p because p is not preserved in the unaligned case.

Noticed by Herbert Xu's superior parameter recycling coding technique
which let the md4 self-test fail on avr32.

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
This commit is contained in:
Sebastian Andrzej Siewior 2009-07-26 14:57:54 +02:00 committed by Haavard Skinnemoen
parent 4be3bd7849
commit 505d62d073
1 changed files with 12 additions and 3 deletions
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15
arch/avr32/lib/memcpy.S
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@ -24,8 +24,8 @@ memcpy:
brne 1f
/* At this point, "from" is word-aligned */
2: sub r10, 4
mov r9, r12
2: mov r9, r12
5: sub r10, 4
brlt 4f
3: ld.w r8, r11++
@ -59,4 +59,13 @@ memcpy:
st.b r12++, r8
ld.ub r8, r11++
st.b r12++, r8
rjmp 2b
mov r8, r12
add pc, pc, r9
sub r8, 1
nop
sub r8, 1
nop
sub r8, 1
nop
mov r9, r8
rjmp 5b