Re: [Fwd: sigcontext on Linux-ppc in user space]

Re: [Fwd: sigcontext on Linux-ppc in user space]

[iweiny]

I don't know if this helps or not but,
I get similar results from my 2 machines.

Machine 1 (2.2.18 glibc 2.1.3-4e)

12:17pm >./a.out
SIGUSR1 = 10
scp = 7ffff694
scp->signal = 0

Machine 2 (2.4.1 glibc 2.1.3-4e)  <= very recent BK kernel

11:21am >./a.out
SIGUSR1 = 10
scp = 7ffff634
scp->signal = 0

Ira

--- To quote Kevin B. Hendricks: ---
>
>
> Hi,
>
> Here is what I get from running it on my system (ppc linux with 2.2.15 kernel with some mods and glibc-2.1.3).
>
> But no segfault.
>
> Kevin
>
>
> [kbhend@localhost ~]$ gcc -O2 -ojunk junk.c
> [kbhend@localhost ~]$ ./junk
> SIGUSR1 = 10
> scp = 7fffe9a4
> scp->signal = 0
> [kbhend@localhost ~]$
>
>

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Re: [Fwd: sigcontext on Linux-ppc in user space]

[Roman Zippel]

Hi,

Could you try the patch below?

bye, Roman

diff -u -r1.1.1.5 signal.c
--- arch/ppc/kernel/signal.c	2000/09/13 17:59:51	1.1.1.5
+++ arch/ppc/kernel/signal.c	2001/01/25 18:59:54
@@ -334,12 +334,12 @@
 	newsp -= __SIGNAL_FRAMESIZE;
 	if (put_user(regs->gpr[1], (unsigned long *)newsp)
 	    || get_user(regs->nip, &rt_sf->uc.uc_mcontext.handler)
-	    || get_user(regs->gpr[3], &rt_sf->uc.uc_mcontext.signal)
-	    || get_user(regs->gpr[4], (unsigned long *)&rt_sf->pinfo)
-	    || get_user(regs->gpr[5], (unsigned long *)&rt_sf->puc))
+	    || get_user(regs->gpr[3], &rt_sf->uc.uc_mcontext.signal))
 		goto badframe;

 	regs->gpr[1] = newsp;
+	regs->gpr[4] = (unsigned long *)&rt_sf->pinfo;
+	regs->gpr[5] = (unsigned long *)&rt_sf->puc;
 	regs->gpr[6] = (unsigned long) rt_sf;
 	regs->link = (unsigned long) frame->tramp;


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