From 04b9bcf911af2b4563b1f1b2e8a103b796dcc9eb Mon Sep 17 00:00:00 2001
From: Laurent Vivier <laurent@vivier.eu>
Date: Wed, 1 Mar 2017 10:37:47 +0100
Subject: [PATCH] linux-user: call fd_trans_target_to_host_data() for write()
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 <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
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