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Fix alignment bug in memcpy_arm (fix #718)

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This commit is contained in:
Stefan Kalkowski 2013-04-26 13:03:01 +02:00 committed by Norman Feske
parent fb0ca69fe4
commit de2b5c0925
1 changed files with 4 additions and 4 deletions
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8
base/include/arm/cpu/string.h
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@ -34,12 +34,13 @@ namespace Genode
size_t d_align = (size_t)d & 0x3;
size_t s_align = (size_t)s & 0x3;
/* at least 32 bytes, 4 byte aligned, same alignment */
if (size < 32 || (d_align ^ s_align))
/* only same alignments work for the following LDM/STM loop */
if (d_align != s_align)
return size;
/* copy to 4 byte alignment */
for (size_t i = 0; i < s_align; i++, *d++ = *s++, size--);
for (; (size > 0) && (s_align > 0) && (s_align < 4);
s_align++, *d++ = *s++, size--);
/* copy 32 byte chunks */
for (; size >= 32; size -= 32) {
@ -48,7 +49,6 @@ namespace Genode
: "+r" (s), "+r" (d)
:: "r3","r4","r5","r6","r7","r8","r9","r10");
}
return size;
}
}