diff options
Diffstat (limited to 'linux-user/mmap.c')
| -rw-r--r-- | linux-user/mmap.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/linux-user/mmap.c b/linux-user/mmap.c index 7b459d5100..445e8c6785 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; } @@ -536,7 +538,7 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, /* handle the end of the mapping */ if (end < real_end) { ret = mmap_frag(real_end - qemu_host_page_size, - real_end - qemu_host_page_size, real_end, + real_end - qemu_host_page_size, end, prot, flags, fd, offset + real_end - qemu_host_page_size - start); if (ret == -1) |