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[Qemu-devel] [6453] x86: Issue reset on triple faults (Jan Kiszka)
From: |
Anthony Liguori |
Subject: |
[Qemu-devel] [6453] x86: Issue reset on triple faults (Jan Kiszka) |
Date: |
Mon, 26 Jan 2009 19:54:41 +0000 |
Revision: 6453
http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6453
Author: aliguori
Date: 2009-01-26 19:54:36 +0000 (Mon, 26 Jan 2009)
Log Message:
-----------
x86: Issue reset on triple faults (Jan Kiszka)
As discussed a few times on this list: A triple fault causes a system
reset on x86, and some guests make use of this (e.g. 386BSD). To keep
the chance of tracing unexpected resets, log them if CPU_LOG_RESET is
set.
Signed-off-by: Jan Kiszka <address@hidden>
Signed-off-by: Anthony Liguori <address@hidden>
Modified Paths:
--------------
trunk/target-i386/op_helper.c
Modified: trunk/target-i386/op_helper.c
===================================================================
--- trunk/target-i386/op_helper.c 2009-01-26 19:54:31 UTC (rev 6452)
+++ trunk/target-i386/op_helper.c 2009-01-26 19:54:36 UTC (rev 6453)
@@ -1251,6 +1251,9 @@
}
}
+/* This should come from sysemu.h - if we could include it here... */
+void qemu_system_reset_request(void);
+
/*
* Check nested exceptions and change to double or triple fault if
* needed. It should only be called, if this is not an interrupt.
@@ -1267,9 +1270,19 @@
qemu_log_mask(CPU_LOG_INT, "check_exception old: 0x%x new 0x%x\n",
env->old_exception, intno);
- if (env->old_exception == EXCP08_DBLE)
- cpu_abort(env, "triple fault");
+#if !defined(CONFIG_USER_ONLY)
+ if (env->old_exception == EXCP08_DBLE) {
+ if (env->hflags & HF_SVMI_MASK)
+ helper_vmexit(SVM_EXIT_SHUTDOWN, 0); /* does not return */
+ if (loglevel & CPU_LOG_RESET)
+ fprintf(logfile, "Triple fault\n");
+
+ qemu_system_reset_request();
+ return EXCP_HLT;
+ }
+#endif
+
if ((first_contributory && second_contributory)
|| (env->old_exception == EXCP0E_PAGE &&
(second_contributory || (intno == EXCP0E_PAGE)))) {
- [Qemu-devel] [6453] x86: Issue reset on triple faults (Jan Kiszka),
Anthony Liguori <=