Re: [Xen-devel] [PATCH 02/22] mini-os: make dump_regs() work in early boot

[Samuel Thibault]

Juergen Gross, on Tue 23 Aug 2016 17:15:48 +0200, wrote:
> dump_regs() will result in page fault in early boot as there is no
> current thread pointer. Handle this case.
> 
> Signed-off-by: Juergen Gross 

Reviewed-by: Samuel Thibault 

> ---
>  arch/x86/traps.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/x86/traps.c b/arch/x86/traps.c
> index 6353718..307a14c 100644
> --- a/arch/x86/traps.c
> +++ b/arch/x86/traps.c
> @@ -32,7 +32,7 @@ void machine_check(void);
>  
>  void dump_regs(struct pt_regs *regs)
>  {
> -printk("Thread: %s\n", current->name);
> +printk("Thread: %s\n", current ? current->name : "*NONE*");
>  #ifdef __i386__
>  printk("EIP: %lx, EFLAGS %lx.\n", regs->eip, regs->eflags);
>  printk("EBX: %08lx ECX: %08lx EDX: %08lx\n",
> -- 
> 2.6.6
> 

-- 
Samuel
 > Subject: pb fvwm95-2 comment l'installer le compiler???
 > Merci d'avance
 je te conseille d'être un peu plus précis dans l'exposé de ton pb...
 -+- EJ in guide du linuxien pervers :"Les modéros sont sympas !" -+-

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[Xen-devel] [PATCH 02/22] mini-os: make dump_regs() work in early boot

[Juergen Gross]

dump_regs() will result in page fault in early boot as there is no
current thread pointer. Handle this case.

Signed-off-by: Juergen Gross 
---
 arch/x86/traps.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/traps.c b/arch/x86/traps.c
index 6353718..307a14c 100644
--- a/arch/x86/traps.c
+++ b/arch/x86/traps.c
@@ -32,7 +32,7 @@ void machine_check(void);
 
 void dump_regs(struct pt_regs *regs)
 {
-printk("Thread: %s\n", current->name);
+printk("Thread: %s\n", current ? current->name : "*NONE*");
 #ifdef __i386__
 printk("EIP: %lx, EFLAGS %lx.\n", regs->eip, regs->eflags);
 printk("EBX: %08lx ECX: %08lx EDX: %08lx\n",
-- 
2.6.6


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