e82d8ade13
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1045 c046a42c-6fe2-441c-8c8c-71466251a162
1658 lines
43 KiB
C
1658 lines
43 KiB
C
/*
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* x86 CPU test
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#define _GNU_SOURCE
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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#include <math.h>
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#include <signal.h>
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#include <setjmp.h>
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#include <errno.h>
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#include <sys/ucontext.h>
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#include <sys/mman.h>
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#include <asm/vm86.h>
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#define TEST_CMOV 0
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#define TEST_FCOMI 0
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//#define LINUX_VM86_IOPL_FIX
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//#define TEST_P4_FLAGS
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#define xglue(x, y) x ## y
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#define glue(x, y) xglue(x, y)
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#define stringify(s) tostring(s)
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#define tostring(s) #s
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#define CC_C 0x0001
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#define CC_P 0x0004
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#define CC_A 0x0010
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#define CC_Z 0x0040
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#define CC_S 0x0080
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#define CC_O 0x0800
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#define __init_call __attribute__ ((unused,__section__ (".initcall.init")))
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static void *call_start __init_call = NULL;
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#define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A)
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#define OP add
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#include "test-i386.h"
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#define OP sub
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#include "test-i386.h"
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#define OP xor
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#include "test-i386.h"
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#define OP and
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#include "test-i386.h"
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#define OP or
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#include "test-i386.h"
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#define OP cmp
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#include "test-i386.h"
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#define OP adc
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#define OP_CC
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#include "test-i386.h"
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#define OP sbb
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#define OP_CC
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#include "test-i386.h"
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#define OP inc
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#define OP_CC
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#define OP1
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#include "test-i386.h"
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#define OP dec
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#define OP_CC
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#define OP1
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#include "test-i386.h"
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#define OP neg
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#define OP_CC
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#define OP1
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#include "test-i386.h"
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#define OP not
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#define OP_CC
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#define OP1
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#include "test-i386.h"
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#undef CC_MASK
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#define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O)
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#define OP shl
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#include "test-i386-shift.h"
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#define OP shr
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#include "test-i386-shift.h"
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#define OP sar
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#include "test-i386-shift.h"
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#define OP rol
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#include "test-i386-shift.h"
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#define OP ror
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#include "test-i386-shift.h"
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#define OP rcr
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#define OP_CC
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#include "test-i386-shift.h"
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#define OP rcl
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#define OP_CC
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#include "test-i386-shift.h"
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#define OP shld
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#define OP_SHIFTD
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#define OP_NOBYTE
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#include "test-i386-shift.h"
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#define OP shrd
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#define OP_SHIFTD
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#define OP_NOBYTE
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#include "test-i386-shift.h"
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/* XXX: should be more precise ? */
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#undef CC_MASK
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#define CC_MASK (CC_C)
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#define OP bt
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#define OP_NOBYTE
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#include "test-i386-shift.h"
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#define OP bts
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#define OP_NOBYTE
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#include "test-i386-shift.h"
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#define OP btr
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#define OP_NOBYTE
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#include "test-i386-shift.h"
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#define OP btc
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#define OP_NOBYTE
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#include "test-i386-shift.h"
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/* lea test (modrm support) */
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#define TEST_LEA(STR)\
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{\
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asm("leal " STR ", %0"\
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: "=r" (res)\
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: "a" (eax), "b" (ebx), "c" (ecx), "d" (edx), "S" (esi), "D" (edi));\
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printf("lea %s = %08x\n", STR, res);\
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}
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#define TEST_LEA16(STR)\
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{\
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asm(".code16 ; .byte 0x67 ; leal " STR ", %0 ; .code32"\
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: "=wq" (res)\
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: "a" (eax), "b" (ebx), "c" (ecx), "d" (edx), "S" (esi), "D" (edi));\
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printf("lea %s = %08x\n", STR, res);\
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}
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void test_lea(void)
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{
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int eax, ebx, ecx, edx, esi, edi, res;
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eax = 0x0001;
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ebx = 0x0002;
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ecx = 0x0004;
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edx = 0x0008;
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esi = 0x0010;
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edi = 0x0020;
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TEST_LEA("0x4000");
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TEST_LEA("(%%eax)");
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TEST_LEA("(%%ebx)");
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TEST_LEA("(%%ecx)");
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TEST_LEA("(%%edx)");
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TEST_LEA("(%%esi)");
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TEST_LEA("(%%edi)");
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TEST_LEA("0x40(%%eax)");
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TEST_LEA("0x40(%%ebx)");
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TEST_LEA("0x40(%%ecx)");
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TEST_LEA("0x40(%%edx)");
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TEST_LEA("0x40(%%esi)");
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TEST_LEA("0x40(%%edi)");
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TEST_LEA("0x4000(%%eax)");
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TEST_LEA("0x4000(%%ebx)");
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TEST_LEA("0x4000(%%ecx)");
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TEST_LEA("0x4000(%%edx)");
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TEST_LEA("0x4000(%%esi)");
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TEST_LEA("0x4000(%%edi)");
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TEST_LEA("(%%eax, %%ecx)");
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TEST_LEA("(%%ebx, %%edx)");
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TEST_LEA("(%%ecx, %%ecx)");
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TEST_LEA("(%%edx, %%ecx)");
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TEST_LEA("(%%esi, %%ecx)");
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TEST_LEA("(%%edi, %%ecx)");
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TEST_LEA("0x40(%%eax, %%ecx)");
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TEST_LEA("0x4000(%%ebx, %%edx)");
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TEST_LEA("(%%ecx, %%ecx, 2)");
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TEST_LEA("(%%edx, %%ecx, 4)");
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TEST_LEA("(%%esi, %%ecx, 8)");
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TEST_LEA("(,%%eax, 2)");
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TEST_LEA("(,%%ebx, 4)");
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TEST_LEA("(,%%ecx, 8)");
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TEST_LEA("0x40(,%%eax, 2)");
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TEST_LEA("0x40(,%%ebx, 4)");
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TEST_LEA("0x40(,%%ecx, 8)");
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TEST_LEA("-10(%%ecx, %%ecx, 2)");
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TEST_LEA("-10(%%edx, %%ecx, 4)");
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TEST_LEA("-10(%%esi, %%ecx, 8)");
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TEST_LEA("0x4000(%%ecx, %%ecx, 2)");
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TEST_LEA("0x4000(%%edx, %%ecx, 4)");
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TEST_LEA("0x4000(%%esi, %%ecx, 8)");
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/* limited 16 bit addressing test */
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TEST_LEA16("0x4000");
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TEST_LEA16("(%%bx)");
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TEST_LEA16("(%%si)");
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TEST_LEA16("(%%di)");
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TEST_LEA16("0x40(%%bx)");
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TEST_LEA16("0x40(%%si)");
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TEST_LEA16("0x40(%%di)");
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TEST_LEA16("0x4000(%%bx)");
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TEST_LEA16("0x4000(%%si)");
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TEST_LEA16("(%%bx,%%si)");
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TEST_LEA16("(%%bx,%%di)");
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TEST_LEA16("0x40(%%bx,%%si)");
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TEST_LEA16("0x40(%%bx,%%di)");
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TEST_LEA16("0x4000(%%bx,%%si)");
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TEST_LEA16("0x4000(%%bx,%%di)");
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}
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#define TEST_JCC(JCC, v1, v2)\
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{\
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int res;\
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asm("movl $1, %0\n\t"\
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"cmpl %2, %1\n\t"\
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"j" JCC " 1f\n\t"\
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"movl $0, %0\n\t"\
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"1:\n\t"\
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: "=r" (res)\
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: "r" (v1), "r" (v2));\
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printf("%-10s %d\n", "j" JCC, res);\
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\
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asm("movl $0, %0\n\t"\
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"cmpl %2, %1\n\t"\
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"set" JCC " %b0\n\t"\
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: "=r" (res)\
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: "r" (v1), "r" (v2));\
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printf("%-10s %d\n", "set" JCC, res);\
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if (TEST_CMOV) {\
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asm("movl $0x12345678, %0\n\t"\
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"cmpl %2, %1\n\t"\
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"cmov" JCC "l %3, %0\n\t"\
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: "=r" (res)\
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: "r" (v1), "r" (v2), "m" (1));\
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printf("%-10s R=0x%08x\n", "cmov" JCC "l", res);\
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asm("movl $0x12345678, %0\n\t"\
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"cmpl %2, %1\n\t"\
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"cmov" JCC "w %w3, %w0\n\t"\
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: "=r" (res)\
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: "r" (v1), "r" (v2), "r" (1));\
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printf("%-10s R=0x%08x\n", "cmov" JCC "w", res);\
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} \
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}
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/* various jump tests */
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void test_jcc(void)
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{
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TEST_JCC("ne", 1, 1);
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TEST_JCC("ne", 1, 0);
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TEST_JCC("e", 1, 1);
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TEST_JCC("e", 1, 0);
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TEST_JCC("l", 1, 1);
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TEST_JCC("l", 1, 0);
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TEST_JCC("l", 1, -1);
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TEST_JCC("le", 1, 1);
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TEST_JCC("le", 1, 0);
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TEST_JCC("le", 1, -1);
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TEST_JCC("ge", 1, 1);
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TEST_JCC("ge", 1, 0);
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TEST_JCC("ge", -1, 1);
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TEST_JCC("g", 1, 1);
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TEST_JCC("g", 1, 0);
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TEST_JCC("g", 1, -1);
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TEST_JCC("b", 1, 1);
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TEST_JCC("b", 1, 0);
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TEST_JCC("b", 1, -1);
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TEST_JCC("be", 1, 1);
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TEST_JCC("be", 1, 0);
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TEST_JCC("be", 1, -1);
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TEST_JCC("ae", 1, 1);
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TEST_JCC("ae", 1, 0);
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TEST_JCC("ae", 1, -1);
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TEST_JCC("a", 1, 1);
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TEST_JCC("a", 1, 0);
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TEST_JCC("a", 1, -1);
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TEST_JCC("p", 1, 1);
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TEST_JCC("p", 1, 0);
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TEST_JCC("np", 1, 1);
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TEST_JCC("np", 1, 0);
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TEST_JCC("o", 0x7fffffff, 0);
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TEST_JCC("o", 0x7fffffff, -1);
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TEST_JCC("no", 0x7fffffff, 0);
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TEST_JCC("no", 0x7fffffff, -1);
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TEST_JCC("s", 0, 1);
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TEST_JCC("s", 0, -1);
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TEST_JCC("s", 0, 0);
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TEST_JCC("ns", 0, 1);
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TEST_JCC("ns", 0, -1);
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TEST_JCC("ns", 0, 0);
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}
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#undef CC_MASK
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#ifdef TEST_P4_FLAGS
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#define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A)
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#else
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#define CC_MASK (CC_O | CC_C)
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#endif
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#define OP mul
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#include "test-i386-muldiv.h"
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#define OP imul
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#include "test-i386-muldiv.h"
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void test_imulw2(int op0, int op1)
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{
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int res, s1, s0, flags;
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s0 = op0;
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s1 = op1;
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res = s0;
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flags = 0;
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asm ("push %4\n\t"
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"popf\n\t"
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"imulw %w2, %w0\n\t"
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"pushf\n\t"
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"popl %1\n\t"
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: "=q" (res), "=g" (flags)
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: "q" (s1), "0" (res), "1" (flags));
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printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n",
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"imulw", s0, s1, res, flags & CC_MASK);
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}
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void test_imull2(int op0, int op1)
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{
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int res, s1, s0, flags;
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s0 = op0;
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s1 = op1;
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res = s0;
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flags = 0;
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asm ("push %4\n\t"
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"popf\n\t"
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"imull %2, %0\n\t"
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"pushf\n\t"
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"popl %1\n\t"
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: "=q" (res), "=g" (flags)
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: "q" (s1), "0" (res), "1" (flags));
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printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n",
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"imull", s0, s1, res, flags & CC_MASK);
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}
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#define TEST_IMUL_IM(size, size1, op0, op1)\
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{\
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int res, flags;\
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flags = 0;\
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res = 0;\
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asm ("push %3\n\t"\
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"popf\n\t"\
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"imul" size " $" #op0 ", %" size1 "2, %" size1 "0\n\t" \
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"pushf\n\t"\
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"popl %1\n\t"\
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: "=r" (res), "=g" (flags)\
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: "r" (op1), "1" (flags), "0" (res));\
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printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n",\
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"imul" size, op0, op1, res, flags & CC_MASK);\
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}
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#undef CC_MASK
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#define CC_MASK (0)
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#define OP div
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#include "test-i386-muldiv.h"
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#define OP idiv
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#include "test-i386-muldiv.h"
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void test_mul(void)
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{
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test_imulb(0x1234561d, 4);
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test_imulb(3, -4);
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test_imulb(0x80, 0x80);
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test_imulb(0x10, 0x10);
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test_imulw(0, 0x1234001d, 45);
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test_imulw(0, 23, -45);
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test_imulw(0, 0x8000, 0x8000);
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test_imulw(0, 0x100, 0x100);
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test_imull(0, 0x1234001d, 45);
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test_imull(0, 23, -45);
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test_imull(0, 0x80000000, 0x80000000);
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test_imull(0, 0x10000, 0x10000);
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test_mulb(0x1234561d, 4);
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test_mulb(3, -4);
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test_mulb(0x80, 0x80);
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test_mulb(0x10, 0x10);
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test_mulw(0, 0x1234001d, 45);
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test_mulw(0, 23, -45);
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test_mulw(0, 0x8000, 0x8000);
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test_mulw(0, 0x100, 0x100);
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test_mull(0, 0x1234001d, 45);
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test_mull(0, 23, -45);
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test_mull(0, 0x80000000, 0x80000000);
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test_mull(0, 0x10000, 0x10000);
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test_imulw2(0x1234001d, 45);
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test_imulw2(23, -45);
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test_imulw2(0x8000, 0x8000);
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test_imulw2(0x100, 0x100);
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test_imull2(0x1234001d, 45);
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test_imull2(23, -45);
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test_imull2(0x80000000, 0x80000000);
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test_imull2(0x10000, 0x10000);
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TEST_IMUL_IM("w", "w", 45, 0x1234);
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TEST_IMUL_IM("w", "w", -45, 23);
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TEST_IMUL_IM("w", "w", 0x8000, 0x80000000);
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TEST_IMUL_IM("w", "w", 0x7fff, 0x1000);
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TEST_IMUL_IM("l", "", 45, 0x1234);
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TEST_IMUL_IM("l", "", -45, 23);
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TEST_IMUL_IM("l", "", 0x8000, 0x80000000);
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TEST_IMUL_IM("l", "", 0x7fff, 0x1000);
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test_idivb(0x12341678, 0x127e);
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test_idivb(0x43210123, -5);
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test_idivb(0x12340004, -1);
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test_idivw(0, 0x12345678, 12347);
|
|
test_idivw(0, -23223, -45);
|
|
test_idivw(0, 0x12348000, -1);
|
|
test_idivw(0x12343, 0x12345678, 0x81238567);
|
|
|
|
test_idivl(0, 0x12345678, 12347);
|
|
test_idivl(0, -233223, -45);
|
|
test_idivl(0, 0x80000000, -1);
|
|
test_idivl(0x12343, 0x12345678, 0x81234567);
|
|
|
|
test_divb(0x12341678, 0x127e);
|
|
test_divb(0x43210123, -5);
|
|
test_divb(0x12340004, -1);
|
|
|
|
test_divw(0, 0x12345678, 12347);
|
|
test_divw(0, -23223, -45);
|
|
test_divw(0, 0x12348000, -1);
|
|
test_divw(0x12343, 0x12345678, 0x81238567);
|
|
|
|
test_divl(0, 0x12345678, 12347);
|
|
test_divl(0, -233223, -45);
|
|
test_divl(0, 0x80000000, -1);
|
|
test_divl(0x12343, 0x12345678, 0x81234567);
|
|
}
|
|
|
|
#define TEST_BSX(op, size, op0)\
|
|
{\
|
|
int res, val, resz;\
|
|
val = op0;\
|
|
asm("xorl %1, %1\n"\
|
|
"movl $0x12345678, %0\n"\
|
|
#op " %" size "2, %" size "0 ; setz %b1" \
|
|
: "=r" (res), "=q" (resz)\
|
|
: "g" (val));\
|
|
printf("%-10s A=%08x R=%08x %d\n", #op, val, res, resz);\
|
|
}
|
|
|
|
void test_bsx(void)
|
|
{
|
|
TEST_BSX(bsrw, "w", 0);
|
|
TEST_BSX(bsrw, "w", 0x12340128);
|
|
TEST_BSX(bsrl, "", 0);
|
|
TEST_BSX(bsrl, "", 0x00340128);
|
|
TEST_BSX(bsfw, "w", 0);
|
|
TEST_BSX(bsfw, "w", 0x12340128);
|
|
TEST_BSX(bsfl, "", 0);
|
|
TEST_BSX(bsfl, "", 0x00340128);
|
|
}
|
|
|
|
/**********************************************/
|
|
|
|
void test_fops(double a, double b)
|
|
{
|
|
printf("a=%f b=%f a+b=%f\n", a, b, a + b);
|
|
printf("a=%f b=%f a-b=%f\n", a, b, a - b);
|
|
printf("a=%f b=%f a*b=%f\n", a, b, a * b);
|
|
printf("a=%f b=%f a/b=%f\n", a, b, a / b);
|
|
printf("a=%f b=%f fmod(a, b)=%f\n", a, b, fmod(a, b));
|
|
printf("a=%f sqrt(a)=%f\n", a, sqrt(a));
|
|
printf("a=%f sin(a)=%f\n", a, sin(a));
|
|
printf("a=%f cos(a)=%f\n", a, cos(a));
|
|
printf("a=%f tan(a)=%f\n", a, tan(a));
|
|
printf("a=%f log(a)=%f\n", a, log(a));
|
|
printf("a=%f exp(a)=%f\n", a, exp(a));
|
|
printf("a=%f b=%f atan2(a, b)=%f\n", a, b, atan2(a, b));
|
|
/* just to test some op combining */
|
|
printf("a=%f asin(sin(a))=%f\n", a, asin(sin(a)));
|
|
printf("a=%f acos(cos(a))=%f\n", a, acos(cos(a)));
|
|
printf("a=%f atan(tan(a))=%f\n", a, atan(tan(a)));
|
|
|
|
}
|
|
|
|
void test_fcmp(double a, double b)
|
|
{
|
|
printf("(%f<%f)=%d\n",
|
|
a, b, a < b);
|
|
printf("(%f<=%f)=%d\n",
|
|
a, b, a <= b);
|
|
printf("(%f==%f)=%d\n",
|
|
a, b, a == b);
|
|
printf("(%f>%f)=%d\n",
|
|
a, b, a > b);
|
|
printf("(%f<=%f)=%d\n",
|
|
a, b, a >= b);
|
|
if (TEST_FCOMI) {
|
|
unsigned int eflags;
|
|
/* test f(u)comi instruction */
|
|
asm("fcomi %2, %1\n"
|
|
"pushf\n"
|
|
"pop %0\n"
|
|
: "=r" (eflags)
|
|
: "t" (a), "u" (b));
|
|
printf("fcomi(%f %f)=%08x\n", a, b, eflags & (CC_Z | CC_P | CC_C));
|
|
}
|
|
}
|
|
|
|
void test_fcvt(double a)
|
|
{
|
|
float fa;
|
|
long double la;
|
|
int16_t fpuc;
|
|
int i;
|
|
int64_t lla;
|
|
int ia;
|
|
int16_t wa;
|
|
double ra;
|
|
|
|
fa = a;
|
|
la = a;
|
|
printf("(float)%f = %f\n", a, fa);
|
|
printf("(long double)%f = %Lf\n", a, la);
|
|
printf("a=%016Lx\n", *(long long *)&a);
|
|
printf("la=%016Lx %04x\n", *(long long *)&la,
|
|
*(unsigned short *)((char *)(&la) + 8));
|
|
|
|
/* test all roundings */
|
|
asm volatile ("fstcw %0" : "=m" (fpuc));
|
|
for(i=0;i<4;i++) {
|
|
asm volatile ("fldcw %0" : : "m" ((fpuc & ~0x0c00) | (i << 10)));
|
|
asm volatile ("fist %0" : "=m" (wa) : "t" (a));
|
|
asm volatile ("fistl %0" : "=m" (ia) : "t" (a));
|
|
asm volatile ("fistpll %0" : "=m" (lla) : "t" (a) : "st");
|
|
asm volatile ("frndint ; fstl %0" : "=m" (ra) : "t" (a));
|
|
asm volatile ("fldcw %0" : : "m" (fpuc));
|
|
printf("(short)a = %d\n", wa);
|
|
printf("(int)a = %d\n", ia);
|
|
printf("(int64_t)a = %Ld\n", lla);
|
|
printf("rint(a) = %f\n", ra);
|
|
}
|
|
}
|
|
|
|
#define TEST(N) \
|
|
asm("fld" #N : "=t" (a)); \
|
|
printf("fld" #N "= %f\n", a);
|
|
|
|
void test_fconst(void)
|
|
{
|
|
double a;
|
|
TEST(1);
|
|
TEST(l2t);
|
|
TEST(l2e);
|
|
TEST(pi);
|
|
TEST(lg2);
|
|
TEST(ln2);
|
|
TEST(z);
|
|
}
|
|
|
|
void test_fbcd(double a)
|
|
{
|
|
unsigned short bcd[5];
|
|
double b;
|
|
|
|
asm("fbstp %0" : "=m" (bcd[0]) : "t" (a) : "st");
|
|
asm("fbld %1" : "=t" (b) : "m" (bcd[0]));
|
|
printf("a=%f bcd=%04x%04x%04x%04x%04x b=%f\n",
|
|
a, bcd[4], bcd[3], bcd[2], bcd[1], bcd[0], b);
|
|
}
|
|
|
|
#define TEST_ENV(env, save, restore)\
|
|
{\
|
|
memset((env), 0xaa, sizeof(*(env)));\
|
|
for(i=0;i<5;i++)\
|
|
asm volatile ("fldl %0" : : "m" (dtab[i]));\
|
|
asm(save " %0\n" : : "m" (*(env)));\
|
|
asm(restore " %0\n": : "m" (*(env)));\
|
|
for(i=0;i<5;i++)\
|
|
asm volatile ("fstpl %0" : "=m" (rtab[i]));\
|
|
for(i=0;i<5;i++)\
|
|
printf("res[%d]=%f\n", i, rtab[i]);\
|
|
printf("fpuc=%04x fpus=%04x fptag=%04x\n",\
|
|
(env)->fpuc,\
|
|
(env)->fpus & 0xff00,\
|
|
(env)->fptag);\
|
|
}
|
|
|
|
void test_fenv(void)
|
|
{
|
|
struct __attribute__((packed)) {
|
|
uint16_t fpuc;
|
|
uint16_t dummy1;
|
|
uint16_t fpus;
|
|
uint16_t dummy2;
|
|
uint16_t fptag;
|
|
uint16_t dummy3;
|
|
uint32_t ignored[4];
|
|
long double fpregs[8];
|
|
} float_env32;
|
|
struct __attribute__((packed)) {
|
|
uint16_t fpuc;
|
|
uint16_t fpus;
|
|
uint16_t fptag;
|
|
uint16_t ignored[4];
|
|
long double fpregs[8];
|
|
} float_env16;
|
|
double dtab[8];
|
|
double rtab[8];
|
|
int i;
|
|
|
|
for(i=0;i<8;i++)
|
|
dtab[i] = i + 1;
|
|
|
|
TEST_ENV(&float_env16, "data16 fnstenv", "data16 fldenv");
|
|
TEST_ENV(&float_env16, "data16 fnsave", "data16 frstor");
|
|
TEST_ENV(&float_env32, "fnstenv", "fldenv");
|
|
TEST_ENV(&float_env32, "fnsave", "frstor");
|
|
|
|
/* test for ffree */
|
|
for(i=0;i<5;i++)
|
|
asm volatile ("fldl %0" : : "m" (dtab[i]));
|
|
asm volatile("ffree %st(2)");
|
|
asm volatile ("fnstenv %0\n" : : "m" (float_env32));
|
|
asm volatile ("fninit");
|
|
printf("fptag=%04x\n", float_env32.fptag);
|
|
}
|
|
|
|
|
|
#define TEST_FCMOV(a, b, eflags, CC)\
|
|
{\
|
|
double res;\
|
|
asm("push %3\n"\
|
|
"popf\n"\
|
|
"fcmov" CC " %2, %0\n"\
|
|
: "=t" (res)\
|
|
: "0" (a), "u" (b), "g" (eflags));\
|
|
printf("fcmov%s eflags=0x%04x-> %f\n", \
|
|
CC, eflags, res);\
|
|
}
|
|
|
|
void test_fcmov(void)
|
|
{
|
|
double a, b;
|
|
int eflags, i;
|
|
|
|
a = 1.0;
|
|
b = 2.0;
|
|
for(i = 0; i < 4; i++) {
|
|
eflags = 0;
|
|
if (i & 1)
|
|
eflags |= CC_C;
|
|
if (i & 2)
|
|
eflags |= CC_Z;
|
|
TEST_FCMOV(a, b, eflags, "b");
|
|
TEST_FCMOV(a, b, eflags, "e");
|
|
TEST_FCMOV(a, b, eflags, "be");
|
|
TEST_FCMOV(a, b, eflags, "nb");
|
|
TEST_FCMOV(a, b, eflags, "ne");
|
|
TEST_FCMOV(a, b, eflags, "nbe");
|
|
}
|
|
TEST_FCMOV(a, b, 0, "u");
|
|
TEST_FCMOV(a, b, CC_P, "u");
|
|
TEST_FCMOV(a, b, 0, "nu");
|
|
TEST_FCMOV(a, b, CC_P, "nu");
|
|
}
|
|
|
|
void test_floats(void)
|
|
{
|
|
test_fops(2, 3);
|
|
test_fops(1.4, -5);
|
|
test_fcmp(2, -1);
|
|
test_fcmp(2, 2);
|
|
test_fcmp(2, 3);
|
|
test_fcvt(0.5);
|
|
test_fcvt(-0.5);
|
|
test_fcvt(1.0/7.0);
|
|
test_fcvt(-1.0/9.0);
|
|
test_fcvt(32768);
|
|
test_fcvt(-1e20);
|
|
test_fconst();
|
|
test_fbcd(1234567890123456);
|
|
test_fbcd(-123451234567890);
|
|
test_fenv();
|
|
if (TEST_CMOV) {
|
|
test_fcmov();
|
|
}
|
|
}
|
|
|
|
/**********************************************/
|
|
|
|
#define TEST_BCD(op, op0, cc_in, cc_mask)\
|
|
{\
|
|
int res, flags;\
|
|
res = op0;\
|
|
flags = cc_in;\
|
|
asm ("push %3\n\t"\
|
|
"popf\n\t"\
|
|
#op "\n\t"\
|
|
"pushf\n\t"\
|
|
"popl %1\n\t"\
|
|
: "=a" (res), "=g" (flags)\
|
|
: "0" (res), "1" (flags));\
|
|
printf("%-10s A=%08x R=%08x CCIN=%04x CC=%04x\n",\
|
|
#op, op0, res, cc_in, flags & cc_mask);\
|
|
}
|
|
|
|
void test_bcd(void)
|
|
{
|
|
TEST_BCD(daa, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(daa, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(daa, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(daa, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(daa, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(daa, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(daa, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(daa, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(daa, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(daa, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(daa, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(daa, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(daa, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
|
|
TEST_BCD(das, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(das, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(das, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(das, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(das, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(das, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(das, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(das, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(das, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(das, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(das, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(das, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
TEST_BCD(das, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
|
|
|
TEST_BCD(aaa, 0x12340205, CC_A, (CC_C | CC_A));
|
|
TEST_BCD(aaa, 0x12340306, CC_A, (CC_C | CC_A));
|
|
TEST_BCD(aaa, 0x1234040a, CC_A, (CC_C | CC_A));
|
|
TEST_BCD(aaa, 0x123405fa, CC_A, (CC_C | CC_A));
|
|
TEST_BCD(aaa, 0x12340205, 0, (CC_C | CC_A));
|
|
TEST_BCD(aaa, 0x12340306, 0, (CC_C | CC_A));
|
|
TEST_BCD(aaa, 0x1234040a, 0, (CC_C | CC_A));
|
|
TEST_BCD(aaa, 0x123405fa, 0, (CC_C | CC_A));
|
|
|
|
TEST_BCD(aas, 0x12340205, CC_A, (CC_C | CC_A));
|
|
TEST_BCD(aas, 0x12340306, CC_A, (CC_C | CC_A));
|
|
TEST_BCD(aas, 0x1234040a, CC_A, (CC_C | CC_A));
|
|
TEST_BCD(aas, 0x123405fa, CC_A, (CC_C | CC_A));
|
|
TEST_BCD(aas, 0x12340205, 0, (CC_C | CC_A));
|
|
TEST_BCD(aas, 0x12340306, 0, (CC_C | CC_A));
|
|
TEST_BCD(aas, 0x1234040a, 0, (CC_C | CC_A));
|
|
TEST_BCD(aas, 0x123405fa, 0, (CC_C | CC_A));
|
|
|
|
TEST_BCD(aam, 0x12340547, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));
|
|
TEST_BCD(aad, 0x12340407, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));
|
|
}
|
|
|
|
#define TEST_XCHG(op, size, opconst)\
|
|
{\
|
|
int op0, op1;\
|
|
op0 = 0x12345678;\
|
|
op1 = 0xfbca7654;\
|
|
asm(#op " %" size "0, %" size "1" \
|
|
: "=q" (op0), opconst (op1) \
|
|
: "0" (op0), "1" (op1));\
|
|
printf("%-10s A=%08x B=%08x\n",\
|
|
#op, op0, op1);\
|
|
}
|
|
|
|
#define TEST_CMPXCHG(op, size, opconst, eax)\
|
|
{\
|
|
int op0, op1;\
|
|
op0 = 0x12345678;\
|
|
op1 = 0xfbca7654;\
|
|
asm(#op " %" size "0, %" size "1" \
|
|
: "=q" (op0), opconst (op1) \
|
|
: "0" (op0), "1" (op1), "a" (eax));\
|
|
printf("%-10s EAX=%08x A=%08x C=%08x\n",\
|
|
#op, eax, op0, op1);\
|
|
}
|
|
|
|
void test_xchg(void)
|
|
{
|
|
TEST_XCHG(xchgl, "", "=q");
|
|
TEST_XCHG(xchgw, "w", "=q");
|
|
TEST_XCHG(xchgb, "b", "=q");
|
|
|
|
TEST_XCHG(xchgl, "", "=m");
|
|
TEST_XCHG(xchgw, "w", "=m");
|
|
TEST_XCHG(xchgb, "b", "=m");
|
|
|
|
TEST_XCHG(xaddl, "", "=q");
|
|
TEST_XCHG(xaddw, "w", "=q");
|
|
TEST_XCHG(xaddb, "b", "=q");
|
|
|
|
{
|
|
int res;
|
|
res = 0x12345678;
|
|
asm("xaddl %1, %0" : "=r" (res) : "0" (res));
|
|
printf("xaddl same res=%08x\n", res);
|
|
}
|
|
|
|
TEST_XCHG(xaddl, "", "=m");
|
|
TEST_XCHG(xaddw, "w", "=m");
|
|
TEST_XCHG(xaddb, "b", "=m");
|
|
|
|
TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfbca7654);
|
|
TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfbca7654);
|
|
TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfbca7654);
|
|
|
|
TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfffefdfc);
|
|
TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfffefdfc);
|
|
TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfffefdfc);
|
|
|
|
TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfbca7654);
|
|
TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfbca7654);
|
|
TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfbca7654);
|
|
|
|
TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfffefdfc);
|
|
TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfffefdfc);
|
|
TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfffefdfc);
|
|
|
|
{
|
|
uint64_t op0, op1, op2;
|
|
int i, eflags;
|
|
|
|
for(i = 0; i < 2; i++) {
|
|
op0 = 0x123456789abcd;
|
|
if (i == 0)
|
|
op1 = 0xfbca765423456;
|
|
else
|
|
op1 = op0;
|
|
op2 = 0x6532432432434;
|
|
asm("cmpxchg8b %1\n"
|
|
"pushf\n"
|
|
"popl %2\n"
|
|
: "=A" (op0), "=m" (op1), "=g" (eflags)
|
|
: "0" (op0), "m" (op1), "b" ((int)op2), "c" ((int)(op2 >> 32)));
|
|
printf("cmpxchg8b: op0=%016llx op1=%016llx CC=%02x\n",
|
|
op0, op1, eflags & CC_Z);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**********************************************/
|
|
/* segmentation tests */
|
|
|
|
#include <asm/ldt.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/version.h>
|
|
|
|
_syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount)
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 66)
|
|
#define modify_ldt_ldt_s user_desc
|
|
#endif
|
|
|
|
uint8_t seg_data1[4096];
|
|
uint8_t seg_data2[4096];
|
|
|
|
#define MK_SEL(n) (((n) << 3) | 7)
|
|
|
|
#define TEST_LR(op, size, seg, mask)\
|
|
{\
|
|
int res, res2;\
|
|
res = 0x12345678;\
|
|
asm (op " %" size "2, %" size "0\n" \
|
|
"movl $0, %1\n"\
|
|
"jnz 1f\n"\
|
|
"movl $1, %1\n"\
|
|
"1:\n"\
|
|
: "=r" (res), "=r" (res2) : "m" (seg), "0" (res));\
|
|
printf(op ": Z=%d %08x\n", res2, res & ~(mask));\
|
|
}
|
|
|
|
/* NOTE: we use Linux modify_ldt syscall */
|
|
void test_segs(void)
|
|
{
|
|
struct modify_ldt_ldt_s ldt;
|
|
long long ldt_table[3];
|
|
int res, res2;
|
|
char tmp;
|
|
struct {
|
|
uint32_t offset;
|
|
uint16_t seg;
|
|
} __attribute__((packed)) segoff;
|
|
|
|
ldt.entry_number = 1;
|
|
ldt.base_addr = (unsigned long)&seg_data1;
|
|
ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12;
|
|
ldt.seg_32bit = 1;
|
|
ldt.contents = MODIFY_LDT_CONTENTS_DATA;
|
|
ldt.read_exec_only = 0;
|
|
ldt.limit_in_pages = 1;
|
|
ldt.seg_not_present = 0;
|
|
ldt.useable = 1;
|
|
modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
|
|
|
|
ldt.entry_number = 2;
|
|
ldt.base_addr = (unsigned long)&seg_data2;
|
|
ldt.limit = (sizeof(seg_data2) + 0xfff) >> 12;
|
|
ldt.seg_32bit = 1;
|
|
ldt.contents = MODIFY_LDT_CONTENTS_DATA;
|
|
ldt.read_exec_only = 0;
|
|
ldt.limit_in_pages = 1;
|
|
ldt.seg_not_present = 0;
|
|
ldt.useable = 1;
|
|
modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
|
|
|
|
modify_ldt(0, &ldt_table, sizeof(ldt_table)); /* read ldt entries */
|
|
#if 0
|
|
{
|
|
int i;
|
|
for(i=0;i<3;i++)
|
|
printf("%d: %016Lx\n", i, ldt_table[i]);
|
|
}
|
|
#endif
|
|
/* do some tests with fs or gs */
|
|
asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1)));
|
|
|
|
seg_data1[1] = 0xaa;
|
|
seg_data2[1] = 0x55;
|
|
|
|
asm volatile ("fs movzbl 0x1, %0" : "=r" (res));
|
|
printf("FS[1] = %02x\n", res);
|
|
|
|
asm volatile ("pushl %%gs\n"
|
|
"movl %1, %%gs\n"
|
|
"gs movzbl 0x1, %0\n"
|
|
"popl %%gs\n"
|
|
: "=r" (res)
|
|
: "r" (MK_SEL(2)));
|
|
printf("GS[1] = %02x\n", res);
|
|
|
|
/* tests with ds/ss (implicit segment case) */
|
|
tmp = 0xa5;
|
|
asm volatile ("pushl %%ebp\n\t"
|
|
"pushl %%ds\n\t"
|
|
"movl %2, %%ds\n\t"
|
|
"movl %3, %%ebp\n\t"
|
|
"movzbl 0x1, %0\n\t"
|
|
"movzbl (%%ebp), %1\n\t"
|
|
"popl %%ds\n\t"
|
|
"popl %%ebp\n\t"
|
|
: "=r" (res), "=r" (res2)
|
|
: "r" (MK_SEL(1)), "r" (&tmp));
|
|
printf("DS[1] = %02x\n", res);
|
|
printf("SS[tmp] = %02x\n", res2);
|
|
|
|
segoff.seg = MK_SEL(2);
|
|
segoff.offset = 0xabcdef12;
|
|
asm volatile("lfs %2, %0\n\t"
|
|
"movl %%fs, %1\n\t"
|
|
: "=r" (res), "=g" (res2)
|
|
: "m" (segoff));
|
|
printf("FS:reg = %04x:%08x\n", res2, res);
|
|
|
|
TEST_LR("larw", "w", MK_SEL(2), 0x0100);
|
|
TEST_LR("larl", "", MK_SEL(2), 0x0100);
|
|
TEST_LR("lslw", "w", MK_SEL(2), 0);
|
|
TEST_LR("lsll", "", MK_SEL(2), 0);
|
|
|
|
TEST_LR("larw", "w", 0xfff8, 0);
|
|
TEST_LR("larl", "", 0xfff8, 0);
|
|
TEST_LR("lslw", "w", 0xfff8, 0);
|
|
TEST_LR("lsll", "", 0xfff8, 0);
|
|
}
|
|
|
|
/* 16 bit code test */
|
|
extern char code16_start, code16_end;
|
|
extern char code16_func1;
|
|
extern char code16_func2;
|
|
extern char code16_func3;
|
|
|
|
void test_code16(void)
|
|
{
|
|
struct modify_ldt_ldt_s ldt;
|
|
int res, res2;
|
|
|
|
/* build a code segment */
|
|
ldt.entry_number = 1;
|
|
ldt.base_addr = (unsigned long)&code16_start;
|
|
ldt.limit = &code16_end - &code16_start;
|
|
ldt.seg_32bit = 0;
|
|
ldt.contents = MODIFY_LDT_CONTENTS_CODE;
|
|
ldt.read_exec_only = 0;
|
|
ldt.limit_in_pages = 0;
|
|
ldt.seg_not_present = 0;
|
|
ldt.useable = 1;
|
|
modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
|
|
|
|
/* call the first function */
|
|
asm volatile ("lcall %1, %2"
|
|
: "=a" (res)
|
|
: "i" (MK_SEL(1)), "i" (&code16_func1): "memory", "cc");
|
|
printf("func1() = 0x%08x\n", res);
|
|
asm volatile ("lcall %2, %3"
|
|
: "=a" (res), "=c" (res2)
|
|
: "i" (MK_SEL(1)), "i" (&code16_func2): "memory", "cc");
|
|
printf("func2() = 0x%08x spdec=%d\n", res, res2);
|
|
asm volatile ("lcall %1, %2"
|
|
: "=a" (res)
|
|
: "i" (MK_SEL(1)), "i" (&code16_func3): "memory", "cc");
|
|
printf("func3() = 0x%08x\n", res);
|
|
}
|
|
|
|
extern char func_lret32;
|
|
extern char func_iret32;
|
|
|
|
void test_misc(void)
|
|
{
|
|
char table[256];
|
|
int res, i;
|
|
|
|
for(i=0;i<256;i++) table[i] = 256 - i;
|
|
res = 0x12345678;
|
|
asm ("xlat" : "=a" (res) : "b" (table), "0" (res));
|
|
printf("xlat: EAX=%08x\n", res);
|
|
|
|
asm volatile ("pushl %%cs ; call %1"
|
|
: "=a" (res)
|
|
: "m" (func_lret32): "memory", "cc");
|
|
printf("func_lret32=%x\n", res);
|
|
|
|
asm volatile ("pushfl ; pushl %%cs ; call %1"
|
|
: "=a" (res)
|
|
: "m" (func_iret32): "memory", "cc");
|
|
printf("func_iret32=%x\n", res);
|
|
|
|
/* specific popl test */
|
|
asm volatile ("pushl $12345432 ; pushl $0x9abcdef ; popl (%%esp) ; popl %0"
|
|
: "=g" (res));
|
|
printf("popl esp=%x\n", res);
|
|
|
|
/* specific popw test */
|
|
asm volatile ("pushl $12345432 ; pushl $0x9abcdef ; popw (%%esp) ; addl $2, %%esp ; popl %0"
|
|
: "=g" (res));
|
|
printf("popw esp=%x\n", res);
|
|
}
|
|
|
|
uint8_t str_buffer[4096];
|
|
|
|
#define TEST_STRING1(OP, size, DF, REP)\
|
|
{\
|
|
int esi, edi, eax, ecx, eflags;\
|
|
\
|
|
esi = (long)(str_buffer + sizeof(str_buffer) / 2);\
|
|
edi = (long)(str_buffer + sizeof(str_buffer) / 2) + 16;\
|
|
eax = 0x12345678;\
|
|
ecx = 17;\
|
|
\
|
|
asm volatile ("pushl $0\n\t"\
|
|
"popf\n\t"\
|
|
DF "\n\t"\
|
|
REP #OP size "\n\t"\
|
|
"cld\n\t"\
|
|
"pushf\n\t"\
|
|
"popl %4\n\t"\
|
|
: "=S" (esi), "=D" (edi), "=a" (eax), "=c" (ecx), "=g" (eflags)\
|
|
: "0" (esi), "1" (edi), "2" (eax), "3" (ecx));\
|
|
printf("%-10s ESI=%08x EDI=%08x EAX=%08x ECX=%08x EFL=%04x\n",\
|
|
REP #OP size, esi, edi, eax, ecx,\
|
|
eflags & (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));\
|
|
}
|
|
|
|
#define TEST_STRING(OP, REP)\
|
|
TEST_STRING1(OP, "b", "", REP);\
|
|
TEST_STRING1(OP, "w", "", REP);\
|
|
TEST_STRING1(OP, "l", "", REP);\
|
|
TEST_STRING1(OP, "b", "std", REP);\
|
|
TEST_STRING1(OP, "w", "std", REP);\
|
|
TEST_STRING1(OP, "l", "std", REP)
|
|
|
|
void test_string(void)
|
|
{
|
|
int i;
|
|
for(i = 0;i < sizeof(str_buffer); i++)
|
|
str_buffer[i] = i + 0x56;
|
|
TEST_STRING(stos, "");
|
|
TEST_STRING(stos, "rep ");
|
|
TEST_STRING(lods, ""); /* to verify stos */
|
|
TEST_STRING(lods, "rep ");
|
|
TEST_STRING(movs, "");
|
|
TEST_STRING(movs, "rep ");
|
|
TEST_STRING(lods, ""); /* to verify stos */
|
|
|
|
/* XXX: better tests */
|
|
TEST_STRING(scas, "");
|
|
TEST_STRING(scas, "repz ");
|
|
TEST_STRING(scas, "repnz ");
|
|
TEST_STRING(cmps, "");
|
|
TEST_STRING(cmps, "repz ");
|
|
TEST_STRING(cmps, "repnz ");
|
|
}
|
|
|
|
/* VM86 test */
|
|
|
|
static inline void set_bit(uint8_t *a, unsigned int bit)
|
|
{
|
|
a[bit / 8] |= (1 << (bit % 8));
|
|
}
|
|
|
|
static inline uint8_t *seg_to_linear(unsigned int seg, unsigned int reg)
|
|
{
|
|
return (uint8_t *)((seg << 4) + (reg & 0xffff));
|
|
}
|
|
|
|
static inline void pushw(struct vm86_regs *r, int val)
|
|
{
|
|
r->esp = (r->esp & ~0xffff) | ((r->esp - 2) & 0xffff);
|
|
*(uint16_t *)seg_to_linear(r->ss, r->esp) = val;
|
|
}
|
|
|
|
#undef __syscall_return
|
|
#define __syscall_return(type, res) \
|
|
do { \
|
|
return (type) (res); \
|
|
} while (0)
|
|
|
|
_syscall2(int, vm86, int, func, struct vm86plus_struct *, v86)
|
|
|
|
extern char vm86_code_start;
|
|
extern char vm86_code_end;
|
|
|
|
#define VM86_CODE_CS 0x100
|
|
#define VM86_CODE_IP 0x100
|
|
|
|
void test_vm86(void)
|
|
{
|
|
struct vm86plus_struct ctx;
|
|
struct vm86_regs *r;
|
|
uint8_t *vm86_mem;
|
|
int seg, ret;
|
|
|
|
vm86_mem = mmap((void *)0x00000000, 0x110000,
|
|
PROT_WRITE | PROT_READ | PROT_EXEC,
|
|
MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0);
|
|
if (vm86_mem == MAP_FAILED) {
|
|
printf("ERROR: could not map vm86 memory");
|
|
return;
|
|
}
|
|
memset(&ctx, 0, sizeof(ctx));
|
|
|
|
/* init basic registers */
|
|
r = &ctx.regs;
|
|
r->eip = VM86_CODE_IP;
|
|
r->esp = 0xfffe;
|
|
seg = VM86_CODE_CS;
|
|
r->cs = seg;
|
|
r->ss = seg;
|
|
r->ds = seg;
|
|
r->es = seg;
|
|
r->fs = seg;
|
|
r->gs = seg;
|
|
r->eflags = VIF_MASK;
|
|
|
|
/* move code to proper address. We use the same layout as a .com
|
|
dos program. */
|
|
memcpy(vm86_mem + (VM86_CODE_CS << 4) + VM86_CODE_IP,
|
|
&vm86_code_start, &vm86_code_end - &vm86_code_start);
|
|
|
|
/* mark int 0x21 as being emulated */
|
|
set_bit((uint8_t *)&ctx.int_revectored, 0x21);
|
|
|
|
for(;;) {
|
|
ret = vm86(VM86_ENTER, &ctx);
|
|
switch(VM86_TYPE(ret)) {
|
|
case VM86_INTx:
|
|
{
|
|
int int_num, ah, v;
|
|
|
|
int_num = VM86_ARG(ret);
|
|
if (int_num != 0x21)
|
|
goto unknown_int;
|
|
ah = (r->eax >> 8) & 0xff;
|
|
switch(ah) {
|
|
case 0x00: /* exit */
|
|
goto the_end;
|
|
case 0x02: /* write char */
|
|
{
|
|
uint8_t c = r->edx;
|
|
putchar(c);
|
|
}
|
|
break;
|
|
case 0x09: /* write string */
|
|
{
|
|
uint8_t c, *ptr;
|
|
ptr = seg_to_linear(r->ds, r->edx);
|
|
for(;;) {
|
|
c = *ptr++;
|
|
if (c == '$')
|
|
break;
|
|
putchar(c);
|
|
}
|
|
r->eax = (r->eax & ~0xff) | '$';
|
|
}
|
|
break;
|
|
case 0xff: /* extension: write eflags number in edx */
|
|
v = (int)r->edx;
|
|
#ifndef LINUX_VM86_IOPL_FIX
|
|
v &= ~0x3000;
|
|
#endif
|
|
printf("%08x\n", v);
|
|
break;
|
|
default:
|
|
unknown_int:
|
|
printf("unsupported int 0x%02x\n", int_num);
|
|
goto the_end;
|
|
}
|
|
}
|
|
break;
|
|
case VM86_SIGNAL:
|
|
/* a signal came, we just ignore that */
|
|
break;
|
|
case VM86_STI:
|
|
break;
|
|
default:
|
|
printf("ERROR: unhandled vm86 return code (0x%x)\n", ret);
|
|
goto the_end;
|
|
}
|
|
}
|
|
the_end:
|
|
printf("VM86 end\n");
|
|
munmap(vm86_mem, 0x110000);
|
|
}
|
|
|
|
/* exception tests */
|
|
#ifndef REG_EAX
|
|
#define REG_EAX EAX
|
|
#define REG_EBX EBX
|
|
#define REG_ECX ECX
|
|
#define REG_EDX EDX
|
|
#define REG_ESI ESI
|
|
#define REG_EDI EDI
|
|
#define REG_EBP EBP
|
|
#define REG_ESP ESP
|
|
#define REG_EIP EIP
|
|
#define REG_EFL EFL
|
|
#define REG_TRAPNO TRAPNO
|
|
#define REG_ERR ERR
|
|
#endif
|
|
|
|
jmp_buf jmp_env;
|
|
int v1;
|
|
int tab[2];
|
|
|
|
void sig_handler(int sig, siginfo_t *info, void *puc)
|
|
{
|
|
struct ucontext *uc = puc;
|
|
|
|
printf("si_signo=%d si_errno=%d si_code=%d",
|
|
info->si_signo, info->si_errno, info->si_code);
|
|
printf(" si_addr=0x%08lx",
|
|
(unsigned long)info->si_addr);
|
|
printf("\n");
|
|
|
|
printf("trapno=0x%02x err=0x%08x",
|
|
uc->uc_mcontext.gregs[REG_TRAPNO],
|
|
uc->uc_mcontext.gregs[REG_ERR]);
|
|
printf(" EIP=0x%08x", uc->uc_mcontext.gregs[REG_EIP]);
|
|
printf("\n");
|
|
longjmp(jmp_env, 1);
|
|
}
|
|
|
|
void test_exceptions(void)
|
|
{
|
|
struct modify_ldt_ldt_s ldt;
|
|
struct sigaction act;
|
|
volatile int val;
|
|
|
|
act.sa_sigaction = sig_handler;
|
|
sigemptyset(&act.sa_mask);
|
|
act.sa_flags = SA_SIGINFO;
|
|
sigaction(SIGFPE, &act, NULL);
|
|
sigaction(SIGILL, &act, NULL);
|
|
sigaction(SIGSEGV, &act, NULL);
|
|
sigaction(SIGBUS, &act, NULL);
|
|
sigaction(SIGTRAP, &act, NULL);
|
|
|
|
/* test division by zero reporting */
|
|
printf("DIVZ exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
/* now divide by zero */
|
|
v1 = 0;
|
|
v1 = 2 / v1;
|
|
}
|
|
|
|
printf("BOUND exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
/* bound exception */
|
|
tab[0] = 1;
|
|
tab[1] = 10;
|
|
asm volatile ("bound %0, %1" : : "r" (11), "m" (tab[0]));
|
|
}
|
|
|
|
printf("segment exceptions:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
/* load an invalid segment */
|
|
asm volatile ("movl %0, %%fs" : : "r" ((0x1234 << 3) | 1));
|
|
}
|
|
if (setjmp(jmp_env) == 0) {
|
|
/* null data segment is valid */
|
|
asm volatile ("movl %0, %%fs" : : "r" (3));
|
|
/* null stack segment */
|
|
asm volatile ("movl %0, %%ss" : : "r" (3));
|
|
}
|
|
|
|
ldt.entry_number = 1;
|
|
ldt.base_addr = (unsigned long)&seg_data1;
|
|
ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12;
|
|
ldt.seg_32bit = 1;
|
|
ldt.contents = MODIFY_LDT_CONTENTS_DATA;
|
|
ldt.read_exec_only = 0;
|
|
ldt.limit_in_pages = 1;
|
|
ldt.seg_not_present = 1;
|
|
ldt.useable = 1;
|
|
modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */
|
|
|
|
if (setjmp(jmp_env) == 0) {
|
|
/* segment not present */
|
|
asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1)));
|
|
}
|
|
|
|
/* test SEGV reporting */
|
|
printf("PF exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
val = 1;
|
|
/* we add a nop to test a weird PC retrieval case */
|
|
asm volatile ("nop");
|
|
/* now store in an invalid address */
|
|
*(char *)0x1234 = 1;
|
|
}
|
|
|
|
/* test SEGV reporting */
|
|
printf("PF exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
val = 1;
|
|
/* read from an invalid address */
|
|
v1 = *(char *)0x1234;
|
|
}
|
|
|
|
/* test illegal instruction reporting */
|
|
printf("UD2 exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
/* now execute an invalid instruction */
|
|
asm volatile("ud2");
|
|
}
|
|
printf("lock nop exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
/* now execute an invalid instruction */
|
|
asm volatile("lock nop");
|
|
}
|
|
|
|
printf("INT exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
asm volatile ("int $0xfd");
|
|
}
|
|
if (setjmp(jmp_env) == 0) {
|
|
asm volatile ("int $0x01");
|
|
}
|
|
if (setjmp(jmp_env) == 0) {
|
|
asm volatile (".byte 0xcd, 0x03");
|
|
}
|
|
if (setjmp(jmp_env) == 0) {
|
|
asm volatile ("int $0x04");
|
|
}
|
|
if (setjmp(jmp_env) == 0) {
|
|
asm volatile ("int $0x05");
|
|
}
|
|
|
|
printf("INT3 exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
asm volatile ("int3");
|
|
}
|
|
|
|
printf("CLI exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
asm volatile ("cli");
|
|
}
|
|
|
|
printf("STI exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
asm volatile ("cli");
|
|
}
|
|
|
|
printf("INTO exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
/* overflow exception */
|
|
asm volatile ("addl $1, %0 ; into" : : "r" (0x7fffffff));
|
|
}
|
|
|
|
printf("OUTB exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
asm volatile ("outb %%al, %%dx" : : "d" (0x4321), "a" (0));
|
|
}
|
|
|
|
printf("INB exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
asm volatile ("inb %%dx, %%al" : "=a" (val) : "d" (0x4321));
|
|
}
|
|
|
|
printf("REP OUTSB exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
asm volatile ("rep outsb" : : "d" (0x4321), "S" (tab), "c" (1));
|
|
}
|
|
|
|
printf("REP INSB exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
asm volatile ("rep insb" : : "d" (0x4321), "D" (tab), "c" (1));
|
|
}
|
|
|
|
printf("HLT exception:\n");
|
|
if (setjmp(jmp_env) == 0) {
|
|
asm volatile ("hlt");
|
|
}
|
|
|
|
printf("single step exception:\n");
|
|
val = 0;
|
|
if (setjmp(jmp_env) == 0) {
|
|
asm volatile ("pushf\n"
|
|
"orl $0x00100, (%%esp)\n"
|
|
"popf\n"
|
|
"movl $0xabcd, %0\n"
|
|
"movl $0x0, %0\n" : "=m" (val) : : "cc", "memory");
|
|
}
|
|
printf("val=0x%x\n", val);
|
|
}
|
|
|
|
/* specific precise single step test */
|
|
void sig_trap_handler(int sig, siginfo_t *info, void *puc)
|
|
{
|
|
struct ucontext *uc = puc;
|
|
printf("EIP=0x%08x\n", uc->uc_mcontext.gregs[REG_EIP]);
|
|
}
|
|
|
|
const uint8_t sstep_buf1[4] = { 1, 2, 3, 4};
|
|
uint8_t sstep_buf2[4];
|
|
|
|
void test_single_step(void)
|
|
{
|
|
struct sigaction act;
|
|
volatile int val;
|
|
int i;
|
|
|
|
val = 0;
|
|
act.sa_sigaction = sig_trap_handler;
|
|
sigemptyset(&act.sa_mask);
|
|
act.sa_flags = SA_SIGINFO;
|
|
sigaction(SIGTRAP, &act, NULL);
|
|
asm volatile ("pushf\n"
|
|
"orl $0x00100, (%%esp)\n"
|
|
"popf\n"
|
|
"movl $0xabcd, %0\n"
|
|
|
|
/* jmp test */
|
|
"movl $3, %%ecx\n"
|
|
"1:\n"
|
|
"addl $1, %0\n"
|
|
"decl %%ecx\n"
|
|
"jnz 1b\n"
|
|
|
|
/* movsb: the single step should stop at each movsb iteration */
|
|
"movl $sstep_buf1, %%esi\n"
|
|
"movl $sstep_buf2, %%edi\n"
|
|
"movl $0, %%ecx\n"
|
|
"rep movsb\n"
|
|
"movl $3, %%ecx\n"
|
|
"rep movsb\n"
|
|
"movl $1, %%ecx\n"
|
|
"rep movsb\n"
|
|
|
|
/* cmpsb: the single step should stop at each cmpsb iteration */
|
|
"movl $sstep_buf1, %%esi\n"
|
|
"movl $sstep_buf2, %%edi\n"
|
|
"movl $0, %%ecx\n"
|
|
"rep cmpsb\n"
|
|
"movl $4, %%ecx\n"
|
|
"rep cmpsb\n"
|
|
|
|
/* getpid() syscall: single step should skip one
|
|
instruction */
|
|
"movl $20, %%eax\n"
|
|
"int $0x80\n"
|
|
"movl $0, %%eax\n"
|
|
|
|
/* when modifying SS, trace is not done on the next
|
|
instruction */
|
|
"movl %%ss, %%ecx\n"
|
|
"movl %%ecx, %%ss\n"
|
|
"addl $1, %0\n"
|
|
"movl $1, %%eax\n"
|
|
"movl %%ecx, %%ss\n"
|
|
"jmp 1f\n"
|
|
"addl $1, %0\n"
|
|
"1:\n"
|
|
"movl $1, %%eax\n"
|
|
"pushl %%ecx\n"
|
|
"popl %%ss\n"
|
|
"addl $1, %0\n"
|
|
"movl $1, %%eax\n"
|
|
|
|
"pushf\n"
|
|
"andl $~0x00100, (%%esp)\n"
|
|
"popf\n"
|
|
: "=m" (val)
|
|
:
|
|
: "cc", "memory", "eax", "ecx", "esi", "edi");
|
|
printf("val=%d\n", val);
|
|
for(i = 0; i < 4; i++)
|
|
printf("sstep_buf2[%d] = %d\n", i, sstep_buf2[i]);
|
|
}
|
|
|
|
/* self modifying code test */
|
|
uint8_t code[] = {
|
|
0xb8, 0x1, 0x00, 0x00, 0x00, /* movl $1, %eax */
|
|
0xc3, /* ret */
|
|
};
|
|
|
|
asm("smc_code2:\n"
|
|
"movl 4(%esp), %eax\n"
|
|
"movl %eax, smc_patch_addr2 + 1\n"
|
|
"nop\n"
|
|
"nop\n"
|
|
"nop\n"
|
|
"nop\n"
|
|
"nop\n"
|
|
"nop\n"
|
|
"nop\n"
|
|
"nop\n"
|
|
"smc_patch_addr2:\n"
|
|
"movl $1, %eax\n"
|
|
"ret\n");
|
|
|
|
typedef int FuncType(void);
|
|
extern int smc_code2(int);
|
|
void test_self_modifying_code(void)
|
|
{
|
|
int i;
|
|
|
|
printf("self modifying code:\n");
|
|
printf("func1 = 0x%x\n", ((FuncType *)code)());
|
|
for(i = 2; i <= 4; i++) {
|
|
code[1] = i;
|
|
printf("func%d = 0x%x\n", i, ((FuncType *)code)());
|
|
}
|
|
|
|
/* more difficult test : the modified code is just after the
|
|
modifying instruction. It is forbidden in Intel specs, but it
|
|
is used by old DOS programs */
|
|
for(i = 2; i <= 4; i++) {
|
|
printf("smc_code2(%d) = %d\n", i, smc_code2(i));
|
|
}
|
|
}
|
|
|
|
static void *call_end __init_call = NULL;
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
void **ptr;
|
|
void (*func)(void);
|
|
|
|
ptr = &call_start + 1;
|
|
while (*ptr != NULL) {
|
|
func = *ptr++;
|
|
func();
|
|
}
|
|
test_bsx();
|
|
test_mul();
|
|
test_jcc();
|
|
test_floats();
|
|
test_bcd();
|
|
test_xchg();
|
|
test_string();
|
|
test_misc();
|
|
test_lea();
|
|
test_segs();
|
|
test_code16();
|
|
test_vm86();
|
|
test_exceptions();
|
|
test_self_modifying_code();
|
|
test_single_step();
|
|
return 0;
|
|
}
|