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avoid unaligned file offset in anonymous mapping 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@215 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-06-09 15:24:18 +00:00
parent aa0aa4fa31
commit 4a585ccb2f
1 changed files with 7 additions and 2 deletions
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9
linux-user/mmap.c
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@ -188,7 +188,7 @@ long target_mmap(unsigned long start, unsigned long len, int prot,
host_start = start & host_page_mask; host_start = start & host_page_mask;
if (!(flags & MAP_FIXED)) { if (!(flags & MAP_FIXED)) {
#ifdef __alpha__ #if defined(__alpha__) || defined(__sparc__)
/* tell the kenel to search at the same place as i386 */ /* tell the kenel to search at the same place as i386 */
if (host_start == 0) if (host_start == 0)
host_start = 0x40000000; host_start = 0x40000000;
@ -282,8 +282,13 @@ long target_mmap(unsigned long start, unsigned long len, int prot,
/* map the middle (easier) */ /* map the middle (easier) */
if (host_start < host_end) { if (host_start < host_end) {
unsigned long offset1;
if (flags & MAP_ANONYMOUS)
offset1 = 0;
else
offset1 = offset + host_start - start;
ret = (long)mmap((void *)host_start, host_end - host_start, ret = (long)mmap((void *)host_start, host_end - host_start,
prot, flags, fd, offset + host_start - start); prot, flags, fd, offset1);
if (ret == -1) if (ret == -1)
return ret; return ret;
} }