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[Qemu-devel] [PULL 01/15] linux-user: call fd_trans_target_to_host_data(
From: |
riku . voipio |
Subject: |
[Qemu-devel] [PULL 01/15] linux-user: call fd_trans_target_to_host_data() for write() |
Date: |
Wed, 31 May 2017 16:08:13 +0300 |
From: Laurent Vivier <address@hidden>
As for sendmsg() or sendto(), we must call the target to
host data translator if it is defined. This is needed for
eventfd(): the write() syscall allows to add a value to
the internal counter, and so, it must be byte-swapped to
the host order.
Signed-off-by: Laurent Vivier <address@hidden>
Signed-off-by: Riku Voipio <address@hidden>
---
linux-user/syscall.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index cec8428589..b2b563e388 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -7767,7 +7767,17 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
case TARGET_NR_write:
if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
goto efault;
- ret = get_errno(safe_write(arg1, p, arg3));
+ if (fd_trans_target_to_host_data(arg1)) {
+ void *copy = g_malloc(arg3);
+ memcpy(copy, p, arg3);
+ ret = fd_trans_target_to_host_data(arg1)(copy, arg3);
+ if (ret >= 0) {
+ ret = get_errno(safe_write(arg1, copy, ret));
+ }
+ g_free(copy);
+ } else {
+ ret = get_errno(safe_write(arg1, p, arg3));
+ }
unlock_user(p, arg2, 0);
break;
#ifdef TARGET_NR_open
--
2.11.0
- [Qemu-devel] [PULL 00/15] Misc linux-user updates, riku . voipio, 2017/05/31
- [Qemu-devel] [PULL 02/15] linux-user: fix eventfd, riku . voipio, 2017/05/31
- [Qemu-devel] [PULL 01/15] linux-user: call fd_trans_target_to_host_data() for write(),
riku . voipio <=
- [Qemu-devel] [PULL 03/15] linux-user: fix fadvise64_64() on ppc, riku . voipio, 2017/05/31
- [Qemu-devel] [PULL 04/15] linux-user: fix inotify, riku . voipio, 2017/05/31
- [Qemu-devel] [PULL 05/15] linux-user: allocate heap memory for execve arguments, riku . voipio, 2017/05/31
- [Qemu-devel] [PULL 08/15] linux-user: add tkill(), tgkill() and rt_sigqueueinfo() strace, riku . voipio, 2017/05/31
- [Qemu-devel] [PULL 09/15] linux-user: fix ssetmask() system call, riku . voipio, 2017/05/31
- [Qemu-devel] [PULL 06/15] linux-user: remove all traces of qemu from /proc/self/cmdline, riku . voipio, 2017/05/31
- [Qemu-devel] [PULL 07/15] linux-user: add strace for getuid(), gettid(), getppid(), geteuid(), riku . voipio, 2017/05/31
- [Qemu-devel] [PULL 10/15] linux-user: fix mismatch of lock/unlock_user() invocations in rt_sigqueinfo() syscall, riku . voipio, 2017/05/31
- [Qemu-devel] [PULL 12/15] linux-user: add support for rt_tgsigqueueinfo() system call, riku . voipio, 2017/05/31
- [Qemu-devel] [PULL 13/15] linux-user: add rt_tgsigqueueinfo() strace, riku . voipio, 2017/05/31