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| author | Sebastian Andrzej Siewior <bigeasy@breakpoint.cc> | 2009-07-26 14:57:54 +0200 |
|---|---|---|
| committer | Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2009-07-27 12:37:27 +0200 |
| commit | 505d62d073b528859b43bfb463a6ceaf3581469e (patch) | |
| tree | 482d391e4f557223e6ea53de27f9c4da859fd156 /arch/avr32 | |
| parent | 4be3bd7849165e7efa6b0b35a23d6a3598d97465 (diff) | |
| download | linux-3.10-505d62d073b528859b43bfb463a6ceaf3581469e.tar.gz linux-3.10-505d62d073b528859b43bfb463a6ceaf3581469e.tar.bz2 linux-3.10-505d62d073b528859b43bfb463a6ceaf3581469e.zip | |
avr32/lib: fix unaligned memcpy()
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>
Diffstat (limited to 'arch/avr32')
| -rw-r--r-- | arch/avr32/lib/memcpy.S | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/arch/avr32/lib/memcpy.S b/arch/avr32/lib/memcpy.S index 0abb26142b6..93e74b6fcdb 100644 --- a/arch/avr32/lib/memcpy.S +++ b/arch/avr32/lib/memcpy.S @@ -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 |