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[Linux] Fix potentially overlapping memory-copy to use memmove() instead

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of memcpy().
This commit is contained in:
Curt Wohlgemuth 2007-10-18 10:45:55 -06:00 committed by David Mosberger-Tang
parent 87247220a9
commit 253f3e5738
1 changed files with 2 additions and 2 deletions
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4
src/os-linux.h
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@ -228,7 +228,7 @@ maps_next (struct map_iterator *mi,
{ {
/* copy down the remaining bytes, if any */ /* copy down the remaining bytes, if any */
if (bytes_left > 0) if (bytes_left > 0)
memcpy (mi->buf_end - mi->buf_size, mi->buf, bytes_left); memmove (mi->buf_end - mi->buf_size, mi->buf, bytes_left);
mi->buf = mi->buf_end - mi->buf_size; mi->buf = mi->buf_end - mi->buf_size;
nread = read (mi->fd, mi->buf + bytes_left, nread = read (mi->fd, mi->buf + bytes_left,
@ -240,7 +240,7 @@ maps_next (struct map_iterator *mi,
/* Move contents to the end of the buffer so we /* Move contents to the end of the buffer so we
maintain the invariant that all bytes between maintain the invariant that all bytes between
mi->buf and mi->buf_end are valid. */ mi->buf and mi->buf_end are valid. */
memcpy (mi->buf_end - nread - bytes_left, mi->buf, memmove (mi->buf_end - nread - bytes_left, mi->buf,
nread + bytes_left); nread + bytes_left);
mi->buf = mi->buf_end - nread - bytes_left; mi->buf = mi->buf_end - nread - bytes_left;
} }