Date: Mon, 14 Aug 2017 11:23:07 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r322496 - head/sys/amd64/amd64 Message-ID: <201708141123.v7EBN7XF023418@repo.freebsd.org>
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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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