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Fix a stupid bug in the save_fpstate ipi, which caused overwriting of 

struct lwp of the lwp owning the fpu. Fix clearing the fplwp - %o0 will
not survive the call to savefpstate - duh!
This commit is contained in:
martin 2007-05-23 08:16:43 +00:00
parent a96a1a1a65
commit 48290fcae6
1 changed files with 4 additions and 3 deletions
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7
sys/arch/sparc64/sparc64/locore.s
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@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.248 2007/05/20 21:51:01 martin Exp $ */
/* $NetBSD: locore.s,v 1.249 2007/05/23 08:16:43 martin Exp $ */
/*
* Copyright (c) 1996-2002 Eduardo Horvath
@ -9465,8 +9465,9 @@ ENTRY(sparc64_ipi_save_fpstate)
sethi %hi(CPUINFO_VA + CI_FPLWP), %o0
ldx [%o0 + %lo(CPUINFO_VA + CI_FPLWP)], %o0
call savefpstate
ldx [%o0 + L_FPSTATE], %l1
stx %g0, [%o0] ! fplwp = NULL
ldx [%o0 + L_FPSTATE], %o0
sethi %hi(CPUINFO_VA + CI_FPLWP), %o0
stx %g0, [%o0 + %lo(CPUINFO_VA + CI_FPLWP)] ! fplwp = NULL
mov %g6, %o5 ! restore saved registers
mov %g5, %o4
mov %g4, %o3