diff options
| author | Chen Gang <chengang@emindsoft.com.cn> | 2015-12-30 09:10:54 +0800 |
|---|---|---|
| committer | Timothy Pearson <tpearson@raptorengineering.com> | 2019-11-29 19:28:22 -0600 |
| commit | fed89ddbc098748d0d16bc1867dc2d0c3a85834b (patch) | |
| tree | 7d83837539739c17191607883609c0025e0914a6 /linux-user/mmap.c | |
| parent | 24e55abe88c694f0946764edae49434dd48fecff (diff) | |
| download | hqemu-fed89ddbc098748d0d16bc1867dc2d0c3a85834b.zip hqemu-fed89ddbc098748d0d16bc1867dc2d0c3a85834b.tar.gz | |
linux-user/mmap.c: Always zero MAP_ANONYMOUS memory in mmap_frag()
When mapping MAP_ANONYMOUS memory fragments, still need notice about to
set it zero, or it will cause issues.
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Diffstat (limited to 'linux-user/mmap.c')
| -rw-r--r-- | linux-user/mmap.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/linux-user/mmap.c b/linux-user/mmap.c index 7b459d5..c6c478e 100644 --- a/linux-user/mmap.c +++ b/linux-user/mmap.c @@ -186,10 +186,12 @@ static int mmap_frag(abi_ulong real_start, if (prot_new != (prot1 | PROT_WRITE)) mprotect(host_start, qemu_host_page_size, prot_new); } else { - /* just update the protection */ if (prot_new != prot1) { mprotect(host_start, qemu_host_page_size, prot_new); } + if (prot_new & PROT_WRITE) { + memset(g2h(start), 0, end - start); + } } return 0; } |
