> > * Changes the syscall prototype and definition to accept the pt_regs
> > struct as an argument (into %eax register).
>
> I forgot to mention that this of course breaks s390 and ppc: you
> need to provide an arch-dependent sys_restart() similar to how it's
> done here.
Thanks, here's the fixup for powerpc.
>From 981dca4f3a879827d6e19a0cf32c7fd25b08a878 Mon Sep 17 00:00:00 2001
From: Nathan Lynch <ntl@xxxxxxxxx>
Date: Mon, 7 Dec 2009 14:51:13 -0600
Subject: [PATCH] checkpoint/powerpc: fix up restart code for ptregscall semantics
Signed-off-by: Nathan Lynch <ntl@xxxxxxxxx>
---
arch/powerpc/kernel/process.c | 20 ++++++++++++++++++++
1 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 457c269..f9da9eb 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -30,6 +30,7 @@
#include <linux/init_task.h>
#include <linux/module.h>
#include <linux/kallsyms.h>
+#include <linux/checkpoint.h>
#include <linux/mqueue.h>
#include <linux/hardirq.h>
#include <linux/utsname.h>
@@ -990,6 +991,25 @@ out:
return error;
}
+int sys_restart(unsigned long a0, unsigned long a1, unsigned long a2,
+ unsigned long a3, unsigned long a4, unsigned long a5,
+ struct pt_regs *regs)
+{
+ unsigned long flags;
+ pid_t pid;
+ int logfd;
+ int fd;
+
+ CHECK_FULL_REGS(regs);
+
+ pid = a0;
+ fd = a1;
+ flags = a2;
+ logfd = a3;
+
+ return do_sys_restart(pid, fd, flags, logfd);
+}
+
#ifdef CONFIG_IRQSTACKS
static inline int valid_irq_stack(unsigned long sp, struct task_struct *p,
unsigned long nbytes)
--
1.6.0.6
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