virtualization/app-emulation/qemu-user/files/0.14.1/0010-qemu-cvs-mmap-amd64.patch

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2011-12-23 16:31:28 +01:00
From: Alexander Graf <agraf@suse.de>
When executing 32-bit guest binaries on 64-bit hosts, mmap() can return
a 64-bit pointer. Tell mmap() to always map in 32-bit address space, so
we make 32-bit guest applications happy.
This is a hack and should not go upstream in its current form!
Signed-off-by: Alexander Graf <agraf@suse.de>
---
linux-user/mmap.c | 12 ++++++------
1 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 994c02b..e24b63a 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -169,7 +169,7 @@ static int mmap_frag(abi_ulong real_start,
if (prot1 == 0) {
/* no page was there, so we allocate one */
void *p = mmap(host_start, qemu_host_page_size, prot,
- flags | MAP_ANONYMOUS, -1, 0);
+ flags | MAP_ANONYMOUS | MAP_32BIT, -1, 0);
if (p == MAP_FAILED)
return -1;
prot1 = prot;
@@ -292,7 +292,7 @@ abi_ulong mmap_find_vma(abi_ulong start, abi_ulong size)
* - shmat() with SHM_REMAP flag
*/
ptr = mmap(g2h(addr), size, PROT_NONE,
- MAP_ANONYMOUS|MAP_PRIVATE|MAP_NORESERVE, -1, 0);
+ MAP_ANONYMOUS|MAP_PRIVATE|MAP_NORESERVE|MAP_32BIT, -1, 0);
/* ENOMEM, if host address space has no memory */
if (ptr == MAP_FAILED) {
@@ -454,14 +454,14 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
especially important if qemu_host_page_size >
qemu_real_host_page_size */
p = mmap(g2h(mmap_start),
- host_len, prot, flags | MAP_FIXED | MAP_ANONYMOUS, -1, 0);
+ host_len, prot, flags | MAP_FIXED | MAP_ANONYMOUS | MAP_32BIT, -1, 0);
if (p == MAP_FAILED)
goto fail;
/* update start so that it points to the file position at 'offset' */
host_start = (unsigned long)p;
if (!(flags & MAP_ANONYMOUS)) {
p = mmap(g2h(mmap_start), len, prot,
- flags | MAP_FIXED, fd, host_offset);
+ flags | MAP_FIXED | MAP_32BIT, fd, host_offset);
host_start += offset - host_offset;
}
start = h2g(host_start);
@@ -547,7 +547,7 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
else
offset1 = offset + real_start - start;
p = mmap(g2h(real_start), real_end - real_start,
- prot, flags, fd, offset1);
+ prot, flags | MAP_32BIT, fd, offset1);
if (p == MAP_FAILED)
goto fail;
}
@@ -603,7 +603,7 @@ static void mmap_reserve(abi_ulong start, abi_ulong size)
}
if (real_start != real_end) {
mmap(g2h(real_start), real_end - real_start, PROT_NONE,
- MAP_FIXED | MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE,
+ MAP_FIXED | MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE | MAP_32BIT,
-1, 0);
}
}
--
1.6.0.2