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qemu / qemu / e374bfa35bfb833928e8edf686e962d16705abeb / . / tests / test-i386.c
blob: b0c2af8554b44c334c7d308b057c1e424c27542a [file] [log] [blame]
/*
* x86 CPU test
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <math.h>
#include <signal.h>
#include <setjmp.h>
#include <errno.h>
#include <sys/ucontext.h>
#include <sys/mman.h>
#include <asm/vm86.h>
#define TEST_CMOV 0
#define TEST_FCOMI 0
//#define LINUX_VM86_IOPL_FIX
//#define TEST_P4_FLAGS
#define xglue(x, y) x ## y
#define glue(x, y) xglue(x, y)
#define stringify(s) tostring(s)
#define tostring(s) #s
#define CC_C 0x0001
#define CC_P 0x0004
#define CC_A 0x0010
#define CC_Z 0x0040
#define CC_S 0x0080
#define CC_O 0x0800
#define __init_call __attribute__ ((unused,__section__ (".initcall.init")))
static void *call_start __init_call = NULL;
#define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A)
#define OP add
#include "test-i386.h"
#define OP sub
#include "test-i386.h"
#define OP xor
#include "test-i386.h"
#define OP and
#include "test-i386.h"
#define OP or
#include "test-i386.h"
#define OP cmp
#include "test-i386.h"
#define OP adc
#define OP_CC
#include "test-i386.h"
#define OP sbb
#define OP_CC
#include "test-i386.h"
#define OP inc
#define OP_CC
#define OP1
#include "test-i386.h"
#define OP dec
#define OP_CC
#define OP1
#include "test-i386.h"
#define OP neg
#define OP_CC
#define OP1
#include "test-i386.h"
#define OP not
#define OP_CC
#define OP1
#include "test-i386.h"
#undef CC_MASK
#define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O)
#define OP shl
#include "test-i386-shift.h"
#define OP shr
#include "test-i386-shift.h"
#define OP sar
#include "test-i386-shift.h"
#define OP rol
#include "test-i386-shift.h"
#define OP ror
#include "test-i386-shift.h"
#define OP rcr
#define OP_CC
#include "test-i386-shift.h"
#define OP rcl
#define OP_CC
#include "test-i386-shift.h"
#define OP shld
#define OP_SHIFTD
#define OP_NOBYTE
#include "test-i386-shift.h"
#define OP shrd
#define OP_SHIFTD
#define OP_NOBYTE
#include "test-i386-shift.h"
/* XXX: should be more precise ? */
#undef CC_MASK
#define CC_MASK (CC_C)
#define OP bt
#define OP_NOBYTE
#include "test-i386-shift.h"
#define OP bts
#define OP_NOBYTE
#include "test-i386-shift.h"
#define OP btr
#define OP_NOBYTE
#include "test-i386-shift.h"
#define OP btc
#define OP_NOBYTE
#include "test-i386-shift.h"
/* lea test (modrm support) */
#define TEST_LEA(STR)\
{\
asm("leal " STR ", %0"\
: "=r" (res)\
: "a" (eax), "b" (ebx), "c" (ecx), "d" (edx), "S" (esi), "D" (edi));\
printf("lea %s = %08x\n", STR, res);\
}
#define TEST_LEA16(STR)\
{\
asm(".code16 ; .byte 0x67 ; leal " STR ", %0 ; .code32"\
: "=wq" (res)\
: "a" (eax), "b" (ebx), "c" (ecx), "d" (edx), "S" (esi), "D" (edi));\
printf("lea %s = %08x\n", STR, res);\
}
void test_lea(void)
{
int eax, ebx, ecx, edx, esi, edi, res;
eax = 0x0001;
ebx = 0x0002;
ecx = 0x0004;
edx = 0x0008;
esi = 0x0010;
edi = 0x0020;
TEST_LEA("0x4000");
TEST_LEA("(%%eax)");
TEST_LEA("(%%ebx)");
TEST_LEA("(%%ecx)");
TEST_LEA("(%%edx)");
TEST_LEA("(%%esi)");
TEST_LEA("(%%edi)");
TEST_LEA("0x40(%%eax)");
TEST_LEA("0x40(%%ebx)");
TEST_LEA("0x40(%%ecx)");
TEST_LEA("0x40(%%edx)");
TEST_LEA("0x40(%%esi)");
TEST_LEA("0x40(%%edi)");
TEST_LEA("0x4000(%%eax)");
TEST_LEA("0x4000(%%ebx)");
TEST_LEA("0x4000(%%ecx)");
TEST_LEA("0x4000(%%edx)");
TEST_LEA("0x4000(%%esi)");
TEST_LEA("0x4000(%%edi)");
TEST_LEA("(%%eax, %%ecx)");
TEST_LEA("(%%ebx, %%edx)");
TEST_LEA("(%%ecx, %%ecx)");
TEST_LEA("(%%edx, %%ecx)");
TEST_LEA("(%%esi, %%ecx)");
TEST_LEA("(%%edi, %%ecx)");
TEST_LEA("0x40(%%eax, %%ecx)");
TEST_LEA("0x4000(%%ebx, %%edx)");
TEST_LEA("(%%ecx, %%ecx, 2)");
TEST_LEA("(%%edx, %%ecx, 4)");
TEST_LEA("(%%esi, %%ecx, 8)");
TEST_LEA("(,%%eax, 2)");
TEST_LEA("(,%%ebx, 4)");
TEST_LEA("(,%%ecx, 8)");
TEST_LEA("0x40(,%%eax, 2)");
TEST_LEA("0x40(,%%ebx, 4)");
TEST_LEA("0x40(,%%ecx, 8)");
TEST_LEA("-10(%%ecx, %%ecx, 2)");
TEST_LEA("-10(%%edx, %%ecx, 4)");
TEST_LEA("-10(%%esi, %%ecx, 8)");
TEST_LEA("0x4000(%%ecx, %%ecx, 2)");
TEST_LEA("0x4000(%%edx, %%ecx, 4)");
TEST_LEA("0x4000(%%esi, %%ecx, 8)");
/* limited 16 bit addressing test */
TEST_LEA16("0x4000");
TEST_LEA16("(%%bx)");
TEST_LEA16("(%%si)");
TEST_LEA16("(%%di)");
TEST_LEA16("0x40(%%bx)");
TEST_LEA16("0x40(%%si)");
TEST_LEA16("0x40(%%di)");
TEST_LEA16("0x4000(%%bx)");
TEST_LEA16("0x4000(%%si)");
TEST_LEA16("(%%bx,%%si)");
TEST_LEA16("(%%bx,%%di)");
TEST_LEA16("0x40(%%bx,%%si)");
TEST_LEA16("0x40(%%bx,%%di)");
TEST_LEA16("0x4000(%%bx,%%si)");
TEST_LEA16("0x4000(%%bx,%%di)");
}
#define TEST_JCC(JCC, v1, v2)\
{\
int res;\
asm("movl $1, %0\n\t"\
"cmpl %2, %1\n\t"\
"j" JCC " 1f\n\t"\
"movl $0, %0\n\t"\
"1:\n\t"\
: "=r" (res)\
: "r" (v1), "r" (v2));\
printf("%-10s %d\n", "j" JCC, res);\
\
asm("movl $0, %0\n\t"\
"cmpl %2, %1\n\t"\
"set" JCC " %b0\n\t"\
: "=r" (res)\
: "r" (v1), "r" (v2));\
printf("%-10s %d\n", "set" JCC, res);\
if (TEST_CMOV) {\
asm("movl $0x12345678, %0\n\t"\
"cmpl %2, %1\n\t"\
"cmov" JCC "l %3, %0\n\t"\
: "=r" (res)\
: "r" (v1), "r" (v2), "m" (1));\
printf("%-10s R=0x%08x\n", "cmov" JCC "l", res);\
asm("movl $0x12345678, %0\n\t"\
"cmpl %2, %1\n\t"\
"cmov" JCC "w %w3, %w0\n\t"\
: "=r" (res)\
: "r" (v1), "r" (v2), "r" (1));\
printf("%-10s R=0x%08x\n", "cmov" JCC "w", res);\
} \
}
/* various jump tests */
void test_jcc(void)
{
TEST_JCC("ne", 1, 1);
TEST_JCC("ne", 1, 0);
TEST_JCC("e", 1, 1);
TEST_JCC("e", 1, 0);
TEST_JCC("l", 1, 1);
TEST_JCC("l", 1, 0);
TEST_JCC("l", 1, -1);
TEST_JCC("le", 1, 1);
TEST_JCC("le", 1, 0);
TEST_JCC("le", 1, -1);
TEST_JCC("ge", 1, 1);
TEST_JCC("ge", 1, 0);
TEST_JCC("ge", -1, 1);
TEST_JCC("g", 1, 1);
TEST_JCC("g", 1, 0);
TEST_JCC("g", 1, -1);
TEST_JCC("b", 1, 1);
TEST_JCC("b", 1, 0);
TEST_JCC("b", 1, -1);
TEST_JCC("be", 1, 1);
TEST_JCC("be", 1, 0);
TEST_JCC("be", 1, -1);
TEST_JCC("ae", 1, 1);
TEST_JCC("ae", 1, 0);
TEST_JCC("ae", 1, -1);
TEST_JCC("a", 1, 1);
TEST_JCC("a", 1, 0);
TEST_JCC("a", 1, -1);
TEST_JCC("p", 1, 1);
TEST_JCC("p", 1, 0);
TEST_JCC("np", 1, 1);
TEST_JCC("np", 1, 0);
TEST_JCC("o", 0x7fffffff, 0);
TEST_JCC("o", 0x7fffffff, -1);
TEST_JCC("no", 0x7fffffff, 0);
TEST_JCC("no", 0x7fffffff, -1);
TEST_JCC("s", 0, 1);
TEST_JCC("s", 0, -1);
TEST_JCC("s", 0, 0);
TEST_JCC("ns", 0, 1);
TEST_JCC("ns", 0, -1);
TEST_JCC("ns", 0, 0);
}
#undef CC_MASK
#ifdef TEST_P4_FLAGS
#define CC_MASK (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A)
#else
#define CC_MASK (CC_O | CC_C)
#endif
#define OP mul
#include "test-i386-muldiv.h"
#define OP imul
#include "test-i386-muldiv.h"
void test_imulw2(int op0, int op1)
{
int res, s1, s0, flags;
s0 = op0;
s1 = op1;
res = s0;
flags = 0;
asm ("push %4\n\t"
"popf\n\t"
"imulw %w2, %w0\n\t"
"pushf\n\t"
"popl %1\n\t"
: "=q" (res), "=g" (flags)
: "q" (s1), "0" (res), "1" (flags));
printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n",
"imulw", s0, s1, res, flags & CC_MASK);
}
void test_imull2(int op0, int op1)
{
int res, s1, s0, flags;
s0 = op0;
s1 = op1;
res = s0;
flags = 0;
asm ("push %4\n\t"
"popf\n\t"
"imull %2, %0\n\t"
"pushf\n\t"
"popl %1\n\t"
: "=q" (res), "=g" (flags)
: "q" (s1), "0" (res), "1" (flags));
printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n",
"imull", s0, s1, res, flags & CC_MASK);
}
#undef CC_MASK
#define CC_MASK (0)
#define OP div
#include "test-i386-muldiv.h"
#define OP idiv
#include "test-i386-muldiv.h"
void test_mul(void)
{
test_imulb(0x1234561d, 4);
test_imulb(3, -4);
test_imulb(0x80, 0x80);
test_imulb(0x10, 0x10);
test_imulw(0, 0x1234001d, 45);
test_imulw(0, 23, -45);
test_imulw(0, 0x8000, 0x8000);
test_imulw(0, 0x100, 0x100);
test_imull(0, 0x1234001d, 45);
test_imull(0, 23, -45);
test_imull(0, 0x80000000, 0x80000000);
test_imull(0, 0x10000, 0x10000);
test_mulb(0x1234561d, 4);
test_mulb(3, -4);
test_mulb(0x80, 0x80);
test_mulb(0x10, 0x10);
test_mulw(0, 0x1234001d, 45);
test_mulw(0, 23, -45);
test_mulw(0, 0x8000, 0x8000);
test_mulw(0, 0x100, 0x100);
test_mull(0, 0x1234001d, 45);
test_mull(0, 23, -45);
test_mull(0, 0x80000000, 0x80000000);
test_mull(0, 0x10000, 0x10000);
test_imulw2(0x1234001d, 45);
test_imulw2(23, -45);
test_imulw2(0x8000, 0x8000);
test_imulw2(0x100, 0x100);
test_imull2(0x1234001d, 45);
test_imull2(23, -45);
test_imull2(0x80000000, 0x80000000);
test_imull2(0x10000, 0x10000);
test_idivb(0x12341678, 0x127e);
test_idivb(0x43210123, -5);
test_idivb(0x12340004, -1);
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 ; " #op " %" size "2, %" size "0 ; setz %b1" \
: "=r" (res), "=q" (resz)\
: "g" (val));\
printf("%-10s A=%08x R=%08x %d\n", #op, val, resz ? 0 : 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, prefix)\
{\
memset((env), 0xaa, sizeof(*(env)));\
asm("fld1\n"\
prefix "fnstenv %1\n"\
prefix "fldenv %1\n"\
: "=t" (res) : "m" (*(env)));\
printf("res=%f\n", res);\
printf("fpuc=%04x fpus=%04x fptag=%04x\n",\
(env)->fpuc,\
(env)->fpus & 0xff00,\
(env)->fptag);\
memset((env), 0xaa, sizeof(*(env)));\
asm("fld1\n"\
prefix "fnsave %1\n"\
prefix "frstor %1\n"\
: "=t" (res) : "m" (*(env)));\
printf("res=%f\n", res);\
printf("fpuc=%04x fpus=%04x fptag=%04x\n",\
(env)->fpuc,\
(env)->fpus & 0xff00,\
(env)->fptag);\
printf("ST(0) = %Lf\n",\
(env)->fpregs[0]);\
}
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 res;
TEST_ENV(&float_env16, "data16 ");
TEST_ENV(&float_env32, "");
}
#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>
_syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount)
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));
}
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 */
};
typedef int FuncType(void);
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)());
}
}
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;
}