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Use callee-saved registers in RAS processing.

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This commit is contained in:
gmcgarry 2002-12-17 20:49:07 +00:00
parent 7443ad1b01
commit 5abd84e433
1 changed files with 4 additions and 7 deletions
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11
sys/arch/i386/i386/locore.S
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@ -1,4 +1,4 @@
/* $NetBSD: locore.S,v 1.3 2002/12/17 19:47:15 gmcgarry Exp $ */ /* $NetBSD: locore.S,v 1.4 2002/12/17 20:49:07 gmcgarry Exp $ */
/*- /*-
* Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
@ -1944,22 +1944,19 @@ switch_restored:
/* /*
* Check for restartable atomic sequences (RAS) * Check for restartable atomic sequences (RAS)
* XXX %edi reloads are not necessary here as %edi is callee-saved!
*/ */
movl CPUVAR(CURPROC),%edi movl CPUVAR(CURPROC),%edi
cmpl $0,P_NRAS(%edi) cmpl $0,P_NRAS(%edi)
je 1f je 1f
movl P_MD_REGS(%edi),%edx movl P_MD_REGS(%edi),%ebx
movl TF_EIP(%edx),%eax movl TF_EIP(%ebx),%eax
pushl %eax pushl %eax
pushl %edi pushl %edi
call _C_LABEL(ras_lookup) call _C_LABEL(ras_lookup)
addl $8,%esp addl $8,%esp
cmpl $-1,%eax cmpl $-1,%eax
je 1f je 1f
movl CPUVAR(CURPROC),%edi movl %eax,TF_EIP(%ebx)
movl P_MD_REGS(%edi),%edx
movl %eax,TF_EIP(%edx)
1: 1:
switch_return: switch_return: