Date: Thu, 30 Apr 2015 21:00:48 +0000 (UTC) From: Neel Natu <neel@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r282284 - head/sys/amd64/vmm Message-ID: <201504302100.t3UL0moJ052825@svn.freebsd.org>
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Author: neel Date: Thu Apr 30 21:00:47 2015 New Revision: 282284 URL: https://svnweb.freebsd.org/changeset/base/282284 Log: When an instruction cannot be decoded just return to userspace so bhyve(8) can dump the instruction bytes. Requested by: grehan MFC after: 1 week Modified: head/sys/amd64/vmm/vmm.c Modified: head/sys/amd64/vmm/vmm.c ============================================================================== --- head/sys/amd64/vmm/vmm.c Thu Apr 30 20:50:42 2015 (r282283) +++ head/sys/amd64/vmm/vmm.c Thu Apr 30 21:00:47 2015 (r282284) @@ -1293,8 +1293,12 @@ vm_handle_inst_emul(struct vm *vm, int v else if (error != 0) panic("%s: vmm_fetch_instruction error %d", __func__, error); - if (vmm_decode_instruction(vm, vcpuid, gla, cpu_mode, cs_d, vie) != 0) - return (EFAULT); + if (vmm_decode_instruction(vm, vcpuid, gla, cpu_mode, cs_d, vie) != 0) { + VCPU_CTR1(vm, vcpuid, "Error decoding instruction at %#lx", + vme->rip + cs_base); + *retu = true; /* dump instruction bytes in userspace */ + return (0); + } /* * If the instruction length was not specified then update it now
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