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[Qemu-devel] [PULL v3 13/22] linux-user: Conditionally Pass Attribute Po
From: |
riku . voipio |
Subject: |
[Qemu-devel] [PULL v3 13/22] linux-user: Conditionally Pass Attribute Pointer to mq_open() |
Date: |
Fri, 22 Aug 2014 16:24:31 +0300 |
From: Tom Musta <address@hidden>
The mq_open system call takes an optional struct mq_attr pointer
argument in the fourth position. This pointer is used when O_CREAT
is specified in the flags (second) argument. It may be NULL, in
which case the queue is created with implementation defined attributes.
Change the code to properly handle the case when NULL is passed in the
arg4 position.
Signed-off-by: Tom Musta <address@hidden>
Reviewed-by: Peter Maydell <address@hidden>
Signed-off-by: Riku Voipio <address@hidden>
---
linux-user/syscall.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index fa8ba8f..e754dbb 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -9115,12 +9115,16 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
#if defined(TARGET_NR_mq_open) && defined(__NR_mq_open)
case TARGET_NR_mq_open:
{
- struct mq_attr posix_mq_attr;
+ struct mq_attr posix_mq_attr, *attrp;
p = lock_user_string(arg1 - 1);
- if (arg4 != 0)
+ if (arg4 != 0) {
copy_from_user_mq_attr (&posix_mq_attr, arg4);
- ret = get_errno(mq_open(p, arg2, arg3, &posix_mq_attr));
+ attrp = &posix_mq_attr;
+ } else {
+ attrp = 0;
+ }
+ ret = get_errno(mq_open(p, arg2, arg3, attrp));
unlock_user (p, arg1, 0);
}
break;
--
2.0.1
- [Qemu-devel] [PULL v3 10/22] linux-user: Dereference Pointer Argument to ipc/semctl Sys Call, (continued)
- [Qemu-devel] [PULL v3 10/22] linux-user: Dereference Pointer Argument to ipc/semctl Sys Call, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 09/22] linux-user: PPC64 semid_ds Doesnt Include _unused1 and _unused2, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 04/22] linux-user: Fix conversion of sigevent argument to timer_create, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 12/22] linux-user: Make ipc syscall's third argument an abi_long, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 18/22] linux-user: Minimum Sig Handler Stack Size for PPC64 ELF V2, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 19/22] linux-user: clock_nanosleep errno Handling on PPC, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 16/22] linux-user: Detect fault in sched_rr_get_interval, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 22/22] linux-user: check return value of malloc(), riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 15/22] linux-user: Handle NULL sched_param argument to sched_*, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 21/22] linux-user: writev Partial Writes, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 13/22] linux-user: Conditionally Pass Attribute Pointer to mq_open(),
riku . voipio <=
- [Qemu-devel] [PULL v3 20/22] linux-user: Support target-to-host translation of mlockall argument, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 14/22] linux-user: Detect Negative Message Sizes in msgsnd System Call, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 11/22] linux-user: Properly Handle semun Structure In Cross-Endian Situations, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 17/22] linux-user: Move get_ppc64_abi, riku . voipio, 2014/08/22
- Re: [Qemu-devel] [PULL v3 00/22] Linux-user updates, Peter Maydell, 2014/08/22