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Use a known good stack at the time of servicing an NMI --- reuse

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the space allocated for the double fault handler since this space
is otherwise unused till the time a double fault occurs.

This change should have been committed alongside r1.127 of
"exception.S", but I somehow missed doing so.

Problem reported by:	jeff
Pointy hat to:		jkoshy
This commit is contained in:
Joseph Koshy 2007-01-27 18:13:24 +00:00
parent a85614b42b
commit 20c71e39c3
1 changed files with 1 additions and 1 deletions
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2
sys/amd64/amd64/machdep.c
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@ -1183,7 +1183,7 @@ hammer_time(u_int64_t modulep, u_int64_t physfree)
setidt(x, &IDTVEC(rsvd), SDT_SYSIGT, SEL_KPL, 0);
setidt(IDT_DE, &IDTVEC(div), SDT_SYSIGT, SEL_KPL, 0);
setidt(IDT_DB, &IDTVEC(dbg), SDT_SYSIGT, SEL_KPL, 0);
setidt(IDT_NMI, &IDTVEC(nmi), SDT_SYSIGT, SEL_KPL, 0);
setidt(IDT_NMI, &IDTVEC(nmi), SDT_SYSIGT, SEL_KPL, 1);
setidt(IDT_BP, &IDTVEC(bpt), SDT_SYSIGT, SEL_UPL, 0);
setidt(IDT_OF, &IDTVEC(ofl), SDT_SYSIGT, SEL_KPL, 0);
setidt(IDT_BR, &IDTVEC(bnd), SDT_SYSIGT, SEL_KPL, 0);