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[PATCH] powerpc: fix altivec_unavailable_exception Oopses

altivec_unavailable_exception is called without setting r3... it looks like
the r3 that actually gets passed in as struct pt_regs *regs is the
undisturbed value of r3 at the time the altivec instruction was encountered.
The user actually gets to choose the pt_regs printed in the Oops!

This fixes the oops by passing the correct pt_regs pointer to
altivec_unavailable_exception.

Signed-off-by: Alan Curry <pacman@TheWorld.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Alan Curry 19 years ago
parent
01aaed9d43
commit
f1434a4854
2 changed files with 2 additions and 0 deletions
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  1. 1 0
      arch/powerpc/kernel/head_32.S
  2. 1 0
      arch/ppc/kernel/head.S

+ 1 - 0
arch/powerpc/kernel/head_32.S
View File 

@@ -714,6 +714,7 @@ AltiVecUnavailable:
 
 #ifdef CONFIG_ALTIVEC
 
 	bne	load_up_altivec		/* if from user, just load it up */
 
 #endif /* CONFIG_ALTIVEC */
 
+	addi	r3,r1,STACK_FRAME_OVERHEAD
 
 	EXC_XFER_EE_LITE(0xf20, altivec_unavailable_exception)
 
 
 PerformanceMonitor:

+ 1 - 0
arch/ppc/kernel/head.S
View File 

@@ -751,6 +751,7 @@ AltiVecUnavailable:
 
 #ifdef CONFIG_ALTIVEC
 
 	bne	load_up_altivec		/* if from user, just load it up */
 
 #endif /* CONFIG_ALTIVEC */
 
+	addi	r3,r1,STACK_FRAME_OVERHEAD
 
 	EXC_XFER_EE_LITE(0xf20, altivec_unavailable_exception)
 
 
 #ifdef CONFIG_PPC64BRIDGE