From: "Tom \"spot\" Callaway" <[EMAIL PROTECTED]>
Date: Tue, 02 Oct 2007 13:28:08 -0400
> I've been trying to track down why postgresql has been failing to run
> its tests when built for sparc64, and working with Tom Lane, we've
> generated an independent test case showing that the failure seems to be
> in the kernel.
>
> The test case is attached:
>
> bash-3.2# gcc -m32 -o semtest32 semtest.c
> bash-3.2# ./semtest32
> created semaphores with id 32769
> bash-3.2# gcc -m64 -o semtest64 semtest.c
> bash-3.2# ./semtest64
> semctl: Invalid argument
>
> Thanks in advance,
This should fix it, thanks again Tom.
commit 6536a6b331d3225921c398eb7c6e4ecedb9b05e0
Author: David S. Miller <[EMAIL PROTECTED]>
Date: Tue Oct 9 20:56:31 2007 -0700
[SPARC64]: Fix bugs in SYSV IPC handling in 64-bit processes.
Thanks to Tom Callaway for the excellent bug report and
test case.
sys_ipc() has several problems, most to due with semaphore
call handling:
1) 'err' return should be a 'long'
2) "union semun" is passed in a register on 64-bit compared
to 32-bit which provides it on the stack and therefore
by reference
3) Second and third arguments to SEMCTL are swapped compared
to 32-bit.
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
diff --git a/arch/sparc64/kernel/sys_sparc.c b/arch/sparc64/kernel/sys_sparc.c
index d108eeb..0d5c502 100644
--- a/arch/sparc64/kernel/sys_sparc.c
+++ b/arch/sparc64/kernel/sys_sparc.c
@@ -436,7 +436,7 @@ out:
asmlinkage long sys_ipc(unsigned int call, int first, unsigned long second,
unsigned long third, void __user *ptr, long fifth)
{
- int err;
+ long err;
/* No need for backward compatibility. We can start fresh... */
if (call <= SEMCTL) {
@@ -453,16 +453,9 @@ asmlinkage long sys_ipc(unsigned int call, int first,
unsigned long second,
err = sys_semget(first, (int)second, (int)third);
goto out;
case SEMCTL: {
- union semun fourth;
- err = -EINVAL;
- if (!ptr)
- goto out;
- err = -EFAULT;
- if (get_user(fourth.__pad,
- (void __user * __user *) ptr))
- goto out;
- err = sys_semctl(first, (int)second | IPC_64,
- (int)third, fourth);
+ err = sys_semctl(first, third,
+ (int)second | IPC_64,
+ (union semun) ptr);
goto out;
}
default:
-
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