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[Qemu-devel] [PULL v3 19/22] linux-user: clock_nanosleep errno Handling
From: |
riku . voipio |
Subject: |
[Qemu-devel] [PULL v3 19/22] linux-user: clock_nanosleep errno Handling on PPC |
Date: |
Fri, 22 Aug 2014 16:24:37 +0300 |
From: Tom Musta <address@hidden>
The clock_nanosleep syscall is unusual in that it returns positive
numbers in error handling situations, versus returning -1 and setting
errno, or returning a negative errno value. On POWER, the kernel will
set the SO bit of CR0 to indicate failure in a syscall. QEMU has
generic handling to do this for syscalls with standard return values.
Add special case code for clock_nanosleep to handle CR0 properly.
Signed-off-by: Tom Musta <address@hidden>
Reviewed-by: Peter Maydell <address@hidden>
Signed-off-by: Riku Voipio <address@hidden>
---
linux-user/syscall.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index ed32f97..450f22d 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -9033,6 +9033,14 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
ret = get_errno(clock_nanosleep(arg1, arg2, &ts, arg4 ? &ts : NULL));
if (arg4)
host_to_target_timespec(arg4, &ts);
+
+#if defined(TARGET_PPC)
+ /* clock_nanosleep is odd in that it returns positive errno values.
+ * On PPC, CR0 bit 3 should be set in such a situation. */
+ if (ret) {
+ ((CPUPPCState *)cpu_env)->crf[0] |= 1;
+ }
+#endif
break;
}
#endif
--
2.0.1
- [Qemu-devel] [PULL v3 05/22] linux-user: fix readlink handling with magic exe symlink, (continued)
- [Qemu-devel] [PULL v3 05/22] linux-user: fix readlink handling with magic exe symlink, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 06/22] linux-user: support timerfd_{create, gettime, settime} syscalls, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 08/22] linux-user: add setns and unshare, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 03/22] linux-user: Fix syscall instruction usermode emulation on X86_64, riku . voipio, 2014/08/22
- [Qemu-devel] [PULL v3 02/22] linux-user: redirect openat calls, riku . voipio, 2014/08/22
- [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 <=
- [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, 2014/08/22
- [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