Author: kib
Date: Mon Aug 14 11:23:07 2017
New Revision: 322496
URL: https://svnweb.freebsd.org/changeset/base/322496
Log:
Print whole machine state on double fault.
It is quite useful when double fault is not caused by a stack overflow.
Tested by: pho (as part of the larger patch)
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Modified:
head/sys/amd64/amd64/trap.c
Modified: head/sys/amd64/amd64/trap.c
==============================================================================
--- head/sys/amd64/amd64/trap.c Mon Aug 14 11:20:54 2017 (r322495)
+++ head/sys/amd64/amd64/trap.c Mon Aug 14 11:23:07 2017 (r322496)
@@ -822,10 +822,24 @@ dblfault_handler(struct trapframe *frame)
if (dtrace_doubletrap_func != NULL)
(*dtrace_doubletrap_func)();
#endif
- printf("\nFatal double fault\n");
- printf("rip = 0x%lx\n", frame->tf_rip);
- printf("rsp = 0x%lx\n", frame->tf_rsp);
- printf("rbp = 0x%lx\n", frame->tf_rbp);
+ printf("\nFatal double fault\n"
+ "rip %#lx rsp %#lx rbp %#lx\n"
+ "rax %#lx rdx %#lx rbx %#lx\n"
+ "rcx %#lx rsi %#lx rdi %#lx\n"
+ "r8 %#lx r9 %#lx r10 %#lx\n"
+ "r11 %#lx r12 %#lx r13 %#lx\n"
+ "r14 %#lx r15 %#lx rflags %#lx\n"
+ "cs %#lx ss %#lx ds %#hx es %#hx fs %#hx gs %#hx\n"
+ "fsbase %#lx gsbase %#lx kgsbase %#lx\n",
+ frame->tf_rip, frame->tf_rsp, frame->tf_rbp,
+ frame->tf_rax, frame->tf_rdx, frame->tf_rbx,
+ frame->tf_rcx, frame->tf_rdi, frame->tf_rsi,
+ frame->tf_r8, frame->tf_r9, frame->tf_r10,
+ frame->tf_r11, frame->tf_r12, frame->tf_r13,
+ frame->tf_r14, frame->tf_r15, frame->tf_rflags,
+ frame->tf_cs, frame->tf_ss, frame->tf_ds, frame->tf_es,
+ frame->tf_fs, frame->tf_gs,
+ rdmsr(MSR_FSBASE), rdmsr(MSR_GSBASE), rdmsr(MSR_KGSBASE));
#ifdef SMP
/* two separate prints in case of a trap on an unmapped page */
printf("cpuid = %d; ", PCPU_GET(cpuid));
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