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linux-user: call fd_trans_target_to_host_data() for write()

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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>
This commit is contained in:
Laurent Vivier 2017-03-01 10:37:47 +01:00 • committed by Riku Voipio
parent 9964e96dc9
commit 04b9bcf911
1 changed files with 11 additions and 1 deletions
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10
linux-user/syscall.c
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@ -7767,7 +7767,17 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
case TARGET_NR_write: case TARGET_NR_write:
if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1))) if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
goto efault; goto efault;
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)); ret = get_errno(safe_write(arg1, p, arg3));
}
unlock_user(p, arg2, 0); unlock_user(p, arg2, 0);
break; break;
#ifdef TARGET_NR_open #ifdef TARGET_NR_open