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load.c
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load.c
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/*-
* Copyright (c) 2011 NetApp, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*-
* Copyright (c) 2011 Google, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/stat.h>
#include <machine/specialreg.h>
#include <machine/vmm.h>
#include <x86/segments.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <vmmapi.h>
#define VM_NAME "test1"
#define VM_MEM_SIZE 128 * 1024 * 1024UL
#define MSR_EFER 0xc0000080
#define CR4_PAE 0x00000020
#define CR4_PSE 0x00000010
#define CR0_PG 0x80000000
#define CR0_PE 0x00000001
#define CR0_NE 0x00000020
#define PG_V 0x001
#define PG_RW 0x002
#define PG_U 0x004
#define PG_PS 0x080
#define ADDR_PT4 0x2000
#define ADDR_PT3 0x3000
#define ADDR_PT2 0x4000
#define ADDR_GDT 0x5000
#define ADDR_STACK 0x6000
#define ADDR_ENTRY 0x10000
#define DESC_UNUSABLE 0x00010000
#define GUEST_NULL_SEL 0
#define GUEST_CODE_SEL 1
#define GUEST_DATA_SEL 2
#define GUEST_GDTR_LIMIT (3 * 8 - 1)
int
main(int argc, char** argv)
{
struct vmctx *ctx;
uint64_t *gdt, *pt4, *pt3, *pt2;
int i;
unsigned char *entry;
unsigned char program[] = {
0xb0, 0x2a, /* mov $0x2a,%al */
0xba, 0xf8, 0x03, 0x00, 0x00, /* mov $0x3f8,%edx */
0xee, /* out %al,(%dx) */
0xeb, 0xfd /* jmp 7 <loop> */
};
vm_create(VM_NAME);
ctx = vm_open(VM_NAME);
vm_setup_memory(ctx, VM_MEM_SIZE, VM_MMAP_ALL);
pt4 = vm_map_gpa(ctx, ADDR_PT4, sizeof(uint64_t) * 512);
pt3 = vm_map_gpa(ctx, ADDR_PT3, sizeof(uint64_t) * 512);
pt2 = vm_map_gpa(ctx, ADDR_PT2, sizeof(uint64_t) * 512);
gdt = vm_map_gpa(ctx, ADDR_GDT, sizeof(uint64_t) * 3);
entry = vm_map_gpa(ctx, ADDR_ENTRY, sizeof(program));
bzero(pt4, PAGE_SIZE);
bzero(pt3, PAGE_SIZE);
bzero(pt2, PAGE_SIZE);
for (i = 0; i < 512; i++) {
pt4[i] = (uint64_t)ADDR_PT3;
pt4[i] |= PG_V | PG_RW | PG_U;
pt3[i] = (uint64_t)ADDR_PT2;
pt3[i] |= PG_V | PG_RW | PG_U;
pt2[i] = i * (2 * 1024 * 1024);
pt2[i] |= PG_V | PG_RW | PG_PS | PG_U;
}
gdt[GUEST_NULL_SEL] = 0;
gdt[GUEST_CODE_SEL] = 0x0020980000000000;
gdt[GUEST_DATA_SEL] = 0x0000900000000000;
memcpy(entry, program, sizeof(program));
vm_set_desc(ctx, 0, VM_REG_GUEST_CS, 0, 0, 0x0000209B);
vm_set_desc(ctx, 0, VM_REG_GUEST_DS, 0, 0, 0x00000093);
vm_set_desc(ctx, 0, VM_REG_GUEST_ES, 0, 0, 0x00000093);
vm_set_desc(ctx, 0, VM_REG_GUEST_FS, 0, 0, 0x00000093);
vm_set_desc(ctx, 0, VM_REG_GUEST_GS, 0, 0, 0x00000093);
vm_set_desc(ctx, 0, VM_REG_GUEST_SS, 0, 0, 0x00000093);
vm_set_desc(ctx, 0, VM_REG_GUEST_TR, 0, 0, 0x0000008b);
vm_set_desc(ctx, 0, VM_REG_GUEST_LDTR, 0, 0, DESC_UNUSABLE);
vm_set_desc(ctx, 0, VM_REG_GUEST_GDTR, ADDR_GDT, GUEST_GDTR_LIMIT, 0);
vm_set_register(ctx, 0, VM_REG_GUEST_CS, GSEL(GUEST_CODE_SEL, SEL_KPL));
vm_set_register(ctx, 0, VM_REG_GUEST_DS, GSEL(GUEST_DATA_SEL, SEL_KPL));
vm_set_register(ctx, 0, VM_REG_GUEST_ES, GSEL(GUEST_DATA_SEL, SEL_KPL));
vm_set_register(ctx, 0, VM_REG_GUEST_FS, GSEL(GUEST_DATA_SEL, SEL_KPL));
vm_set_register(ctx, 0, VM_REG_GUEST_GS, GSEL(GUEST_DATA_SEL, SEL_KPL));
vm_set_register(ctx, 0, VM_REG_GUEST_SS, GSEL(GUEST_DATA_SEL, SEL_KPL));
vm_set_register(ctx, 0, VM_REG_GUEST_TR, 0);
vm_set_register(ctx, 0, VM_REG_GUEST_LDTR, 0);
vm_set_register(ctx, 0, VM_REG_GUEST_CR0, CR0_PG | CR0_PE | CR0_NE);
vm_set_register(ctx, 0, VM_REG_GUEST_CR3, ADDR_PT4);
vm_set_register(ctx, 0, VM_REG_GUEST_CR4, CR4_PAE | CR4_VMXE);
vm_set_register(ctx, 0, VM_REG_GUEST_EFER, EFER_LMA | EFER_LME);
vm_set_register(ctx, 0, VM_REG_GUEST_RFLAGS, 0x2);
vm_set_register(ctx, 0, VM_REG_GUEST_RSP, ADDR_STACK);
vm_set_register(ctx, 0, VM_REG_GUEST_RIP, ADDR_ENTRY);
return (0);
}