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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*
* Copyright 2019 Joyent, Inc.
*/
/* This file is dual-licensed; see usr/src/contrib/bhyve/LICENSE */
#include <sys/asm_linkage.h>
#include <sys/segments.h>
/*
* %rdi = trapno
*
* This variant is for any explicit exception injection that we need: in this
* case, we can't just, for example, do a direct "int $2", as that will then
* trash our %cr3 via tr_nmiint due to KPTI, so we have to fake a trap frame.
* Both NMIs and MCEs don't push an 'err' into the frame.
*/
ENTRY_NP(vmm_call_trap)
pushq %rbp
movq %rsp, %rbp
movq %rsp, %r11
andq $~0xf, %rsp /* align stack */
pushq $KDS_SEL /* %ss */
pushq %r11 /* %rsp */
pushfq /* %rflags */
pushq $KCS_SEL /* %cs */
leaq .trap_iret_dest(%rip), %rcx
pushq %rcx /* %rip */
cli
cmpq $T_NMIFLT, %rdi
je nmiint
cmpq $T_MCE, %rdi
je mcetrap
pushq %rdi /* save our bad trapno... */
leaq __vmm_call_bad_trap(%rip), %rdi
xorl %eax, %eax
call panic
/*NOTREACHED*/
.trap_iret_dest:
popq %rbp
ret
SET_SIZE(vmm_call_trap)
__vmm_call_bad_trap:
.string "bad trapno for vmm_call_trap()"
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