root / tests / test-i386.c @ 03bfca94
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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 <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 <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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|
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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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|
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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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|
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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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|
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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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|
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TEST_JCC("e", 1, 1); |
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TEST_JCC("e", 1, 0); |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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|
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TEST_JCC("p", 1, 1); |
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TEST_JCC("p", 1, 0); |
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|
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TEST_JCC("np", 1, 1); |
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TEST_JCC("np", 1, 0); |
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|
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TEST_JCC("o", 0x7fffffff, 0); |
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TEST_JCC("o", 0x7fffffff, -1); |
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|
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TEST_JCC("no", 0x7fffffff, 0); |
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TEST_JCC("no", 0x7fffffff, -1); |
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|
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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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|
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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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|
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#undef CC_MASK
|
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#define CC_MASK (CC_O | CC_C)
|
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|
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#define OP mul
|
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#include "test-i386-muldiv.h" |
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|
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#define OP imul
|
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#include "test-i386-muldiv.h" |
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|
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#undef CC_MASK
|
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#define CC_MASK (0) |
| 343 |
|
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#define OP div
|
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#include "test-i386-muldiv.h" |
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|
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#define OP idiv
|
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#include "test-i386-muldiv.h" |
| 349 |
|
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void test_imulw2(int op0, int op1) |
| 351 |
{
|
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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" |
| 358 |
"popf\n\t"
|
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"imulw %w2, %w0\n\t"
|
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"pushf\n\t"
|
| 361 |
"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);
|
| 366 |
} |
| 367 |
|
| 368 |
void test_imull2(int op0, int op1) |
| 369 |
{
|
| 370 |
int res, s1, s0, flags;
|
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s0 = op0; |
| 372 |
s1 = op1; |
| 373 |
res = s0; |
| 374 |
flags = 0;
|
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asm ("push %4\n\t" |
| 376 |
"popf\n\t"
|
| 377 |
"imull %2, %0\n\t"
|
| 378 |
"pushf\n\t"
|
| 379 |
"popl %1\n\t"
|
| 380 |
: "=q" (res), "=g" (flags) |
| 381 |
: "q" (s1), "0" (res), "1" (flags)); |
| 382 |
printf("%-10s A=%08x B=%08x R=%08x CC=%04x\n",
|
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"imull", s0, s1, res, flags & CC_MASK);
|
| 384 |
} |
| 385 |
|
| 386 |
void test_mul(void) |
| 387 |
{
|
| 388 |
test_imulb(0x1234561d, 4); |
| 389 |
test_imulb(3, -4); |
| 390 |
test_imulb(0x80, 0x80); |
| 391 |
test_imulb(0x10, 0x10); |
| 392 |
|
| 393 |
test_imulw(0, 0x1234001d, 45); |
| 394 |
test_imulw(0, 23, -45); |
| 395 |
test_imulw(0, 0x8000, 0x8000); |
| 396 |
test_imulw(0, 0x100, 0x100); |
| 397 |
|
| 398 |
test_imull(0, 0x1234001d, 45); |
| 399 |
test_imull(0, 23, -45); |
| 400 |
test_imull(0, 0x80000000, 0x80000000); |
| 401 |
test_imull(0, 0x10000, 0x10000); |
| 402 |
|
| 403 |
test_mulb(0x1234561d, 4); |
| 404 |
test_mulb(3, -4); |
| 405 |
test_mulb(0x80, 0x80); |
| 406 |
test_mulb(0x10, 0x10); |
| 407 |
|
| 408 |
test_mulw(0, 0x1234001d, 45); |
| 409 |
test_mulw(0, 23, -45); |
| 410 |
test_mulw(0, 0x8000, 0x8000); |
| 411 |
test_mulw(0, 0x100, 0x100); |
| 412 |
|
| 413 |
test_mull(0, 0x1234001d, 45); |
| 414 |
test_mull(0, 23, -45); |
| 415 |
test_mull(0, 0x80000000, 0x80000000); |
| 416 |
test_mull(0, 0x10000, 0x10000); |
| 417 |
|
| 418 |
test_imulw2(0x1234001d, 45); |
| 419 |
test_imulw2(23, -45); |
| 420 |
test_imulw2(0x8000, 0x8000); |
| 421 |
test_imulw2(0x100, 0x100); |
| 422 |
|
| 423 |
test_imull2(0x1234001d, 45); |
| 424 |
test_imull2(23, -45); |
| 425 |
test_imull2(0x80000000, 0x80000000); |
| 426 |
test_imull2(0x10000, 0x10000); |
| 427 |
|
| 428 |
test_idivb(0x12341678, 0x127e); |
| 429 |
test_idivb(0x43210123, -5); |
| 430 |
test_idivb(0x12340004, -1); |
| 431 |
|
| 432 |
test_idivw(0, 0x12345678, 12347); |
| 433 |
test_idivw(0, -23223, -45); |
| 434 |
test_idivw(0, 0x12348000, -1); |
| 435 |
test_idivw(0x12343, 0x12345678, 0x81238567); |
| 436 |
|
| 437 |
test_idivl(0, 0x12345678, 12347); |
| 438 |
test_idivl(0, -233223, -45); |
| 439 |
test_idivl(0, 0x80000000, -1); |
| 440 |
test_idivl(0x12343, 0x12345678, 0x81234567); |
| 441 |
|
| 442 |
test_divb(0x12341678, 0x127e); |
| 443 |
test_divb(0x43210123, -5); |
| 444 |
test_divb(0x12340004, -1); |
| 445 |
|
| 446 |
test_divw(0, 0x12345678, 12347); |
| 447 |
test_divw(0, -23223, -45); |
| 448 |
test_divw(0, 0x12348000, -1); |
| 449 |
test_divw(0x12343, 0x12345678, 0x81238567); |
| 450 |
|
| 451 |
test_divl(0, 0x12345678, 12347); |
| 452 |
test_divl(0, -233223, -45); |
| 453 |
test_divl(0, 0x80000000, -1); |
| 454 |
test_divl(0x12343, 0x12345678, 0x81234567); |
| 455 |
} |
| 456 |
|
| 457 |
#define TEST_BSX(op, size, op0)\
|
| 458 |
{\
|
| 459 |
int res, val, resz;\
|
| 460 |
val = op0;\ |
| 461 |
asm("xorl %1, %1 ; " #op " %" size "2, %" size "0 ; setz %b1" \ |
| 462 |
: "=r" (res), "=q" (resz)\ |
| 463 |
: "g" (val));\
|
| 464 |
printf("%-10s A=%08x R=%08x %d\n", #op, val, resz ? 0 : res, resz);\ |
| 465 |
} |
| 466 |
|
| 467 |
void test_bsx(void) |
| 468 |
{
|
| 469 |
TEST_BSX(bsrw, "w", 0); |
| 470 |
TEST_BSX(bsrw, "w", 0x12340128); |
| 471 |
TEST_BSX(bsrl, "", 0); |
| 472 |
TEST_BSX(bsrl, "", 0x00340128); |
| 473 |
TEST_BSX(bsfw, "w", 0); |
| 474 |
TEST_BSX(bsfw, "w", 0x12340128); |
| 475 |
TEST_BSX(bsfl, "", 0); |
| 476 |
TEST_BSX(bsfl, "", 0x00340128); |
| 477 |
} |
| 478 |
|
| 479 |
/**********************************************/
|
| 480 |
|
| 481 |
void test_fops(double a, double b) |
| 482 |
{
|
| 483 |
printf("a=%f b=%f a+b=%f\n", a, b, a + b);
|
| 484 |
printf("a=%f b=%f a-b=%f\n", a, b, a - b);
|
| 485 |
printf("a=%f b=%f a*b=%f\n", a, b, a * b);
|
| 486 |
printf("a=%f b=%f a/b=%f\n", a, b, a / b);
|
| 487 |
printf("a=%f b=%f fmod(a, b)=%f\n", a, b, fmod(a, b));
|
| 488 |
printf("a=%f sqrt(a)=%f\n", a, sqrt(a));
|
| 489 |
printf("a=%f sin(a)=%f\n", a, sin(a));
|
| 490 |
printf("a=%f cos(a)=%f\n", a, cos(a));
|
| 491 |
printf("a=%f tan(a)=%f\n", a, tan(a));
|
| 492 |
printf("a=%f log(a)=%f\n", a, log(a));
|
| 493 |
printf("a=%f exp(a)=%f\n", a, exp(a));
|
| 494 |
printf("a=%f b=%f atan2(a, b)=%f\n", a, b, atan2(a, b));
|
| 495 |
/* just to test some op combining */
|
| 496 |
printf("a=%f asin(sin(a))=%f\n", a, asin(sin(a)));
|
| 497 |
printf("a=%f acos(cos(a))=%f\n", a, acos(cos(a)));
|
| 498 |
printf("a=%f atan(tan(a))=%f\n", a, atan(tan(a)));
|
| 499 |
|
| 500 |
} |
| 501 |
|
| 502 |
void test_fcmp(double a, double b) |
| 503 |
{
|
| 504 |
printf("(%f<%f)=%d\n",
|
| 505 |
a, b, a < b); |
| 506 |
printf("(%f<=%f)=%d\n",
|
| 507 |
a, b, a <= b); |
| 508 |
printf("(%f==%f)=%d\n",
|
| 509 |
a, b, a == b); |
| 510 |
printf("(%f>%f)=%d\n",
|
| 511 |
a, b, a > b); |
| 512 |
printf("(%f<=%f)=%d\n",
|
| 513 |
a, b, a >= b); |
| 514 |
if (TEST_FCOMI) {
|
| 515 |
unsigned int eflags; |
| 516 |
/* test f(u)comi instruction */
|
| 517 |
asm("fcomi %2, %1\n" |
| 518 |
"pushf\n"
|
| 519 |
"pop %0\n"
|
| 520 |
: "=r" (eflags)
|
| 521 |
: "t" (a), "u" (b)); |
| 522 |
printf("fcomi(%f %f)=%08x\n", a, b, eflags & (CC_Z | CC_P | CC_C));
|
| 523 |
} |
| 524 |
} |
| 525 |
|
| 526 |
void test_fcvt(double a) |
| 527 |
{
|
| 528 |
float fa;
|
| 529 |
long double la; |
| 530 |
|
| 531 |
fa = a; |
| 532 |
la = a; |
| 533 |
printf("(float)%f = %f\n", a, fa);
|
| 534 |
printf("(long double)%f = %Lf\n", a, la);
|
| 535 |
printf("a=%016Lx\n", *(long long *)&a); |
| 536 |
printf("la=%016Lx %04x\n", *(long long *)&la, |
| 537 |
*(unsigned short *)((char *)(&la) + 8)); |
| 538 |
printf("a=%f floor(a)=%f\n", a, floor(a));
|
| 539 |
printf("a=%f ceil(a)=%f\n", a, ceil(a));
|
| 540 |
printf("a=%f rint(a)=%f\n", a, rint(a));
|
| 541 |
} |
| 542 |
|
| 543 |
#define TEST(N) \
|
| 544 |
asm("fld" #N : "=t" (a)); \ |
| 545 |
printf("fld" #N "= %f\n", a); |
| 546 |
|
| 547 |
void test_fconst(void) |
| 548 |
{
|
| 549 |
double a;
|
| 550 |
TEST(1);
|
| 551 |
TEST(l2t); |
| 552 |
TEST(l2e); |
| 553 |
TEST(pi); |
| 554 |
TEST(lg2); |
| 555 |
TEST(ln2); |
| 556 |
TEST(z); |
| 557 |
} |
| 558 |
|
| 559 |
void test_fbcd(double a) |
| 560 |
{
|
| 561 |
unsigned short bcd[5]; |
| 562 |
double b;
|
| 563 |
|
| 564 |
asm("fbstp %0" : "=m" (bcd[0]) : "t" (a) : "st"); |
| 565 |
asm("fbld %1" : "=t" (b) : "m" (bcd[0])); |
| 566 |
printf("a=%f bcd=%04x%04x%04x%04x%04x b=%f\n",
|
| 567 |
a, bcd[4], bcd[3], bcd[2], bcd[1], bcd[0], b); |
| 568 |
} |
| 569 |
|
| 570 |
#define TEST_ENV(env, prefix)\
|
| 571 |
{\
|
| 572 |
memset((env), 0xaa, sizeof(*(env)));\ |
| 573 |
asm("fld1\n"\ |
| 574 |
prefix "fnstenv %1\n"\
|
| 575 |
prefix "fldenv %1\n"\
|
| 576 |
: "=t" (res) : "m" (*(env)) : "st");\ |
| 577 |
printf("res=%f\n", res);\
|
| 578 |
printf("fpuc=%04x fpus=%04x fptag=%04x\n",\
|
| 579 |
(env)->fpuc,\ |
| 580 |
(env)->fpus & 0xff00,\
|
| 581 |
(env)->fptag);\ |
| 582 |
memset((env), 0xaa, sizeof(*(env)));\ |
| 583 |
asm("fld1\n"\ |
| 584 |
prefix "fnsave %1\n"\
|
| 585 |
prefix "frstor %1\n"\
|
| 586 |
: "=t" (res) : "m" (*(env)) : "st");\ |
| 587 |
printf("res=%f\n", res);\
|
| 588 |
printf("fpuc=%04x fpus=%04x fptag=%04x\n",\
|
| 589 |
(env)->fpuc,\ |
| 590 |
(env)->fpus & 0xff00,\
|
| 591 |
(env)->fptag);\ |
| 592 |
printf("ST(0) = %Lf\n",\
|
| 593 |
(env)->fpregs[0]);\
|
| 594 |
} |
| 595 |
|
| 596 |
void test_fenv(void) |
| 597 |
{
|
| 598 |
struct __attribute__((packed)) {
|
| 599 |
uint16_t fpuc; |
| 600 |
uint16_t dummy1; |
| 601 |
uint16_t fpus; |
| 602 |
uint16_t dummy2; |
| 603 |
uint16_t fptag; |
| 604 |
uint16_t dummy3; |
| 605 |
uint32_t ignored[4];
|
| 606 |
long double fpregs[8]; |
| 607 |
} float_env32; |
| 608 |
struct __attribute__((packed)) {
|
| 609 |
uint16_t fpuc; |
| 610 |
uint16_t fpus; |
| 611 |
uint16_t fptag; |
| 612 |
uint16_t ignored[4];
|
| 613 |
long double fpregs[8]; |
| 614 |
} float_env16; |
| 615 |
double res;
|
| 616 |
|
| 617 |
TEST_ENV(&float_env16, "data16 ");
|
| 618 |
TEST_ENV(&float_env32, "");
|
| 619 |
} |
| 620 |
|
| 621 |
void test_floats(void) |
| 622 |
{
|
| 623 |
test_fops(2, 3); |
| 624 |
test_fops(1.4, -5); |
| 625 |
test_fcmp(2, -1); |
| 626 |
test_fcmp(2, 2); |
| 627 |
test_fcmp(2, 3); |
| 628 |
test_fcvt(1.0/7.0); |
| 629 |
test_fcvt(-1.0/9.0); |
| 630 |
test_fcvt(1e30);
|
| 631 |
test_fconst(); |
| 632 |
test_fbcd(1234567890123456);
|
| 633 |
test_fbcd(-123451234567890);
|
| 634 |
test_fenv(); |
| 635 |
} |
| 636 |
|
| 637 |
/**********************************************/
|
| 638 |
|
| 639 |
#define TEST_BCD(op, op0, cc_in, cc_mask)\
|
| 640 |
{\
|
| 641 |
int res, flags;\
|
| 642 |
res = op0;\ |
| 643 |
flags = cc_in;\ |
| 644 |
asm ("push %3\n\t"\ |
| 645 |
"popf\n\t"\
|
| 646 |
#op "\n\t"\ |
| 647 |
"pushf\n\t"\
|
| 648 |
"popl %1\n\t"\
|
| 649 |
: "=a" (res), "=g" (flags)\ |
| 650 |
: "0" (res), "1" (flags));\ |
| 651 |
printf("%-10s A=%08x R=%08x CCIN=%04x CC=%04x\n",\
|
| 652 |
#op, op0, res, cc_in, flags & cc_mask);\
|
| 653 |
} |
| 654 |
|
| 655 |
void test_bcd(void) |
| 656 |
{
|
| 657 |
TEST_BCD(daa, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 658 |
TEST_BCD(daa, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 659 |
TEST_BCD(daa, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 660 |
TEST_BCD(daa, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 661 |
TEST_BCD(daa, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 662 |
TEST_BCD(daa, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 663 |
TEST_BCD(daa, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 664 |
TEST_BCD(daa, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A)); |
| 665 |
TEST_BCD(daa, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A)); |
| 666 |
TEST_BCD(daa, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 667 |
TEST_BCD(daa, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 668 |
TEST_BCD(daa, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 669 |
TEST_BCD(daa, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 670 |
|
| 671 |
TEST_BCD(das, 0x12340503, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 672 |
TEST_BCD(das, 0x12340506, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 673 |
TEST_BCD(das, 0x12340507, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 674 |
TEST_BCD(das, 0x12340559, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 675 |
TEST_BCD(das, 0x12340560, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 676 |
TEST_BCD(das, 0x1234059f, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 677 |
TEST_BCD(das, 0x123405a0, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 678 |
TEST_BCD(das, 0x12340503, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A)); |
| 679 |
TEST_BCD(das, 0x12340506, 0, (CC_C | CC_P | CC_Z | CC_S | CC_A)); |
| 680 |
TEST_BCD(das, 0x12340503, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 681 |
TEST_BCD(das, 0x12340506, CC_C, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 682 |
TEST_BCD(das, 0x12340503, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 683 |
TEST_BCD(das, 0x12340506, CC_C | CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_A));
|
| 684 |
|
| 685 |
TEST_BCD(aaa, 0x12340205, CC_A, (CC_C | CC_A));
|
| 686 |
TEST_BCD(aaa, 0x12340306, CC_A, (CC_C | CC_A));
|
| 687 |
TEST_BCD(aaa, 0x1234040a, CC_A, (CC_C | CC_A));
|
| 688 |
TEST_BCD(aaa, 0x123405fa, CC_A, (CC_C | CC_A));
|
| 689 |
TEST_BCD(aaa, 0x12340205, 0, (CC_C | CC_A)); |
| 690 |
TEST_BCD(aaa, 0x12340306, 0, (CC_C | CC_A)); |
| 691 |
TEST_BCD(aaa, 0x1234040a, 0, (CC_C | CC_A)); |
| 692 |
TEST_BCD(aaa, 0x123405fa, 0, (CC_C | CC_A)); |
| 693 |
|
| 694 |
TEST_BCD(aas, 0x12340205, CC_A, (CC_C | CC_A));
|
| 695 |
TEST_BCD(aas, 0x12340306, CC_A, (CC_C | CC_A));
|
| 696 |
TEST_BCD(aas, 0x1234040a, CC_A, (CC_C | CC_A));
|
| 697 |
TEST_BCD(aas, 0x123405fa, CC_A, (CC_C | CC_A));
|
| 698 |
TEST_BCD(aas, 0x12340205, 0, (CC_C | CC_A)); |
| 699 |
TEST_BCD(aas, 0x12340306, 0, (CC_C | CC_A)); |
| 700 |
TEST_BCD(aas, 0x1234040a, 0, (CC_C | CC_A)); |
| 701 |
TEST_BCD(aas, 0x123405fa, 0, (CC_C | CC_A)); |
| 702 |
|
| 703 |
TEST_BCD(aam, 0x12340547, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));
|
| 704 |
TEST_BCD(aad, 0x12340407, CC_A, (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));
|
| 705 |
} |
| 706 |
|
| 707 |
#define TEST_XCHG(op, size, opconst)\
|
| 708 |
{\
|
| 709 |
int op0, op1;\
|
| 710 |
op0 = 0x12345678;\
|
| 711 |
op1 = 0xfbca7654;\
|
| 712 |
asm(#op " %" size "0, %" size "1" \ |
| 713 |
: "=q" (op0), opconst (op1) \
|
| 714 |
: "0" (op0), "1" (op1));\ |
| 715 |
printf("%-10s A=%08x B=%08x\n",\
|
| 716 |
#op, op0, op1);\
|
| 717 |
} |
| 718 |
|
| 719 |
#define TEST_CMPXCHG(op, size, opconst, eax)\
|
| 720 |
{\
|
| 721 |
int op0, op1;\
|
| 722 |
op0 = 0x12345678;\
|
| 723 |
op1 = 0xfbca7654;\
|
| 724 |
asm(#op " %" size "0, %" size "1" \ |
| 725 |
: "=q" (op0), opconst (op1) \
|
| 726 |
: "0" (op0), "1" (op1), "a" (eax));\ |
| 727 |
printf("%-10s EAX=%08x A=%08x C=%08x\n",\
|
| 728 |
#op, eax, op0, op1);\
|
| 729 |
} |
| 730 |
|
| 731 |
void test_xchg(void) |
| 732 |
{
|
| 733 |
TEST_XCHG(xchgl, "", "=q"); |
| 734 |
TEST_XCHG(xchgw, "w", "=q"); |
| 735 |
TEST_XCHG(xchgb, "b", "=q"); |
| 736 |
|
| 737 |
TEST_XCHG(xchgl, "", "=m"); |
| 738 |
TEST_XCHG(xchgw, "w", "=m"); |
| 739 |
TEST_XCHG(xchgb, "b", "=m"); |
| 740 |
|
| 741 |
TEST_XCHG(xaddl, "", "=q"); |
| 742 |
TEST_XCHG(xaddw, "w", "=q"); |
| 743 |
TEST_XCHG(xaddb, "b", "=q"); |
| 744 |
|
| 745 |
TEST_XCHG(xaddl, "", "=m"); |
| 746 |
TEST_XCHG(xaddw, "w", "=m"); |
| 747 |
TEST_XCHG(xaddb, "b", "=m"); |
| 748 |
|
| 749 |
TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfbca7654); |
| 750 |
TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfbca7654); |
| 751 |
TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfbca7654); |
| 752 |
|
| 753 |
TEST_CMPXCHG(cmpxchgl, "", "=q", 0xfffefdfc); |
| 754 |
TEST_CMPXCHG(cmpxchgw, "w", "=q", 0xfffefdfc); |
| 755 |
TEST_CMPXCHG(cmpxchgb, "b", "=q", 0xfffefdfc); |
| 756 |
|
| 757 |
TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfbca7654); |
| 758 |
TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfbca7654); |
| 759 |
TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfbca7654); |
| 760 |
|
| 761 |
TEST_CMPXCHG(cmpxchgl, "", "=m", 0xfffefdfc); |
| 762 |
TEST_CMPXCHG(cmpxchgw, "w", "=m", 0xfffefdfc); |
| 763 |
TEST_CMPXCHG(cmpxchgb, "b", "=m", 0xfffefdfc); |
| 764 |
} |
| 765 |
|
| 766 |
/**********************************************/
|
| 767 |
/* segmentation tests */
|
| 768 |
|
| 769 |
#include <asm/ldt.h> |
| 770 |
#include <linux/unistd.h> |
| 771 |
|
| 772 |
_syscall3(int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount) |
| 773 |
|
| 774 |
uint8_t seg_data1[4096];
|
| 775 |
uint8_t seg_data2[4096];
|
| 776 |
|
| 777 |
#define MK_SEL(n) (((n) << 3) | 7) |
| 778 |
|
| 779 |
#define TEST_LR(op, size, seg, mask)\
|
| 780 |
{\
|
| 781 |
int res, res2;\
|
| 782 |
res = 0x12345678;\
|
| 783 |
asm (op " %" size "2, %" size "0\n" \ |
| 784 |
"movl $0, %1\n"\
|
| 785 |
"jnz 1f\n"\
|
| 786 |
"movl $1, %1\n"\
|
| 787 |
"1:\n"\
|
| 788 |
: "=r" (res), "=r" (res2) : "m" (seg), "0" (res));\ |
| 789 |
printf(op ": Z=%d %08x\n", res2, res & ~(mask));\
|
| 790 |
} |
| 791 |
|
| 792 |
/* NOTE: we use Linux modify_ldt syscall */
|
| 793 |
void test_segs(void) |
| 794 |
{
|
| 795 |
struct modify_ldt_ldt_s ldt;
|
| 796 |
long long ldt_table[3]; |
| 797 |
int res, res2;
|
| 798 |
char tmp;
|
| 799 |
struct {
|
| 800 |
uint32_t offset; |
| 801 |
uint16_t seg; |
| 802 |
} __attribute__((packed)) segoff; |
| 803 |
|
| 804 |
ldt.entry_number = 1;
|
| 805 |
ldt.base_addr = (unsigned long)&seg_data1; |
| 806 |
ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12; |
| 807 |
ldt.seg_32bit = 1;
|
| 808 |
ldt.contents = MODIFY_LDT_CONTENTS_DATA; |
| 809 |
ldt.read_exec_only = 0;
|
| 810 |
ldt.limit_in_pages = 1;
|
| 811 |
ldt.seg_not_present = 0;
|
| 812 |
ldt.useable = 1;
|
| 813 |
modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */ |
| 814 |
|
| 815 |
ldt.entry_number = 2;
|
| 816 |
ldt.base_addr = (unsigned long)&seg_data2; |
| 817 |
ldt.limit = (sizeof(seg_data2) + 0xfff) >> 12; |
| 818 |
ldt.seg_32bit = 1;
|
| 819 |
ldt.contents = MODIFY_LDT_CONTENTS_DATA; |
| 820 |
ldt.read_exec_only = 0;
|
| 821 |
ldt.limit_in_pages = 1;
|
| 822 |
ldt.seg_not_present = 0;
|
| 823 |
ldt.useable = 1;
|
| 824 |
modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */ |
| 825 |
|
| 826 |
modify_ldt(0, &ldt_table, sizeof(ldt_table)); /* read ldt entries */ |
| 827 |
#if 0
|
| 828 |
{
|
| 829 |
int i;
|
| 830 |
for(i=0;i<3;i++)
|
| 831 |
printf("%d: %016Lx\n", i, ldt_table[i]);
|
| 832 |
}
|
| 833 |
#endif
|
| 834 |
/* do some tests with fs or gs */
|
| 835 |
asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1))); |
| 836 |
asm volatile ("movl %0, %%gs" : : "r" (MK_SEL(2))); |
| 837 |
|
| 838 |
seg_data1[1] = 0xaa; |
| 839 |
seg_data2[1] = 0x55; |
| 840 |
|
| 841 |
asm volatile ("fs movzbl 0x1, %0" : "=r" (res)); |
| 842 |
printf("FS[1] = %02x\n", res);
|
| 843 |
|
| 844 |
asm volatile ("gs movzbl 0x1, %0" : "=r" (res)); |
| 845 |
printf("GS[1] = %02x\n", res);
|
| 846 |
|
| 847 |
/* tests with ds/ss (implicit segment case) */
|
| 848 |
tmp = 0xa5;
|
| 849 |
asm volatile ("pushl %%ebp\n\t" |
| 850 |
"pushl %%ds\n\t"
|
| 851 |
"movl %2, %%ds\n\t"
|
| 852 |
"movl %3, %%ebp\n\t"
|
| 853 |
"movzbl 0x1, %0\n\t"
|
| 854 |
"movzbl (%%ebp), %1\n\t"
|
| 855 |
"popl %%ds\n\t"
|
| 856 |
"popl %%ebp\n\t"
|
| 857 |
: "=r" (res), "=r" (res2) |
| 858 |
: "r" (MK_SEL(1)), "r" (&tmp)); |
| 859 |
printf("DS[1] = %02x\n", res);
|
| 860 |
printf("SS[tmp] = %02x\n", res2);
|
| 861 |
|
| 862 |
segoff.seg = MK_SEL(2);
|
| 863 |
segoff.offset = 0xabcdef12;
|
| 864 |
asm volatile("lfs %2, %0\n\t" |
| 865 |
"movl %%fs, %1\n\t"
|
| 866 |
: "=r" (res), "=g" (res2) |
| 867 |
: "m" (segoff));
|
| 868 |
printf("FS:reg = %04x:%08x\n", res2, res);
|
| 869 |
|
| 870 |
TEST_LR("larw", "w", MK_SEL(2), 0x0100); |
| 871 |
TEST_LR("larl", "", MK_SEL(2), 0x0100); |
| 872 |
TEST_LR("lslw", "w", MK_SEL(2), 0); |
| 873 |
TEST_LR("lsll", "", MK_SEL(2), 0); |
| 874 |
|
| 875 |
TEST_LR("larw", "w", 0xfff8, 0); |
| 876 |
TEST_LR("larl", "", 0xfff8, 0); |
| 877 |
TEST_LR("lslw", "w", 0xfff8, 0); |
| 878 |
TEST_LR("lsll", "", 0xfff8, 0); |
| 879 |
} |
| 880 |
|
| 881 |
/* 16 bit code test */
|
| 882 |
extern char code16_start, code16_end; |
| 883 |
extern char code16_func1; |
| 884 |
extern char code16_func2; |
| 885 |
extern char code16_func3; |
| 886 |
|
| 887 |
void test_code16(void) |
| 888 |
{
|
| 889 |
struct modify_ldt_ldt_s ldt;
|
| 890 |
int res, res2;
|
| 891 |
|
| 892 |
/* build a code segment */
|
| 893 |
ldt.entry_number = 1;
|
| 894 |
ldt.base_addr = (unsigned long)&code16_start; |
| 895 |
ldt.limit = &code16_end - &code16_start; |
| 896 |
ldt.seg_32bit = 0;
|
| 897 |
ldt.contents = MODIFY_LDT_CONTENTS_CODE; |
| 898 |
ldt.read_exec_only = 0;
|
| 899 |
ldt.limit_in_pages = 0;
|
| 900 |
ldt.seg_not_present = 0;
|
| 901 |
ldt.useable = 1;
|
| 902 |
modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */ |
| 903 |
|
| 904 |
/* call the first function */
|
| 905 |
asm volatile ("lcall %1, %2" |
| 906 |
: "=a" (res)
|
| 907 |
: "i" (MK_SEL(1)), "i" (&code16_func1): "memory", "cc"); |
| 908 |
printf("func1() = 0x%08x\n", res);
|
| 909 |
asm volatile ("lcall %2, %3" |
| 910 |
: "=a" (res), "=c" (res2) |
| 911 |
: "i" (MK_SEL(1)), "i" (&code16_func2): "memory", "cc"); |
| 912 |
printf("func2() = 0x%08x spdec=%d\n", res, res2);
|
| 913 |
asm volatile ("lcall %1, %2" |
| 914 |
: "=a" (res)
|
| 915 |
: "i" (MK_SEL(1)), "i" (&code16_func3): "memory", "cc"); |
| 916 |
printf("func3() = 0x%08x\n", res);
|
| 917 |
} |
| 918 |
|
| 919 |
void test_misc(void) |
| 920 |
{
|
| 921 |
char table[256]; |
| 922 |
int res, i;
|
| 923 |
|
| 924 |
for(i=0;i<256;i++) table[i] = 256 - i; |
| 925 |
res = 0x12345678;
|
| 926 |
asm ("xlat" : "=a" (res) : "b" (table), "0" (res)); |
| 927 |
printf("xlat: EAX=%08x\n", res);
|
| 928 |
} |
| 929 |
|
| 930 |
uint8_t str_buffer[4096];
|
| 931 |
|
| 932 |
#define TEST_STRING1(OP, size, DF, REP)\
|
| 933 |
{\
|
| 934 |
int esi, edi, eax, ecx, eflags;\
|
| 935 |
\ |
| 936 |
esi = (long)(str_buffer + sizeof(str_buffer) / 2);\ |
| 937 |
edi = (long)(str_buffer + sizeof(str_buffer) / 2) + 16;\ |
| 938 |
eax = 0x12345678;\
|
| 939 |
ecx = 17;\
|
| 940 |
\ |
| 941 |
asm volatile ("pushl $0\n\t"\ |
| 942 |
"popf\n\t"\
|
| 943 |
DF "\n\t"\
|
| 944 |
REP #OP size "\n\t"\ |
| 945 |
"cld\n\t"\
|
| 946 |
"pushf\n\t"\
|
| 947 |
"popl %4\n\t"\
|
| 948 |
: "=S" (esi), "=D" (edi), "=a" (eax), "=c" (ecx), "=g" (eflags)\ |
| 949 |
: "0" (esi), "1" (edi), "2" (eax), "3" (ecx));\ |
| 950 |
printf("%-10s ESI=%08x EDI=%08x EAX=%08x ECX=%08x EFL=%04x\n",\
|
| 951 |
REP #OP size, esi, edi, eax, ecx,\
|
| 952 |
eflags & (CC_C | CC_P | CC_Z | CC_S | CC_O | CC_A));\ |
| 953 |
} |
| 954 |
|
| 955 |
#define TEST_STRING(OP, REP)\
|
| 956 |
TEST_STRING1(OP, "b", "", REP);\ |
| 957 |
TEST_STRING1(OP, "w", "", REP);\ |
| 958 |
TEST_STRING1(OP, "l", "", REP);\ |
| 959 |
TEST_STRING1(OP, "b", "std", REP);\ |
| 960 |
TEST_STRING1(OP, "w", "std", REP);\ |
| 961 |
TEST_STRING1(OP, "l", "std", REP) |
| 962 |
|
| 963 |
void test_string(void) |
| 964 |
{
|
| 965 |
int i;
|
| 966 |
for(i = 0;i < sizeof(str_buffer); i++) |
| 967 |
str_buffer[i] = i + 0x56;
|
| 968 |
TEST_STRING(stos, "");
|
| 969 |
TEST_STRING(stos, "rep ");
|
| 970 |
TEST_STRING(lods, ""); /* to verify stos */ |
| 971 |
TEST_STRING(lods, "rep ");
|
| 972 |
TEST_STRING(movs, "");
|
| 973 |
TEST_STRING(movs, "rep ");
|
| 974 |
TEST_STRING(lods, ""); /* to verify stos */ |
| 975 |
|
| 976 |
/* XXX: better tests */
|
| 977 |
TEST_STRING(scas, "");
|
| 978 |
TEST_STRING(scas, "repz ");
|
| 979 |
TEST_STRING(scas, "repnz ");
|
| 980 |
TEST_STRING(cmps, "");
|
| 981 |
TEST_STRING(cmps, "repz ");
|
| 982 |
TEST_STRING(cmps, "repnz ");
|
| 983 |
} |
| 984 |
|
| 985 |
/* VM86 test */
|
| 986 |
|
| 987 |
static inline void set_bit(uint8_t *a, unsigned int bit) |
| 988 |
{
|
| 989 |
a[bit / 8] |= (1 << (bit % 8)); |
| 990 |
} |
| 991 |
|
| 992 |
static inline uint8_t *seg_to_linear(unsigned int seg, unsigned int reg) |
| 993 |
{
|
| 994 |
return (uint8_t *)((seg << 4) + (reg & 0xffff)); |
| 995 |
} |
| 996 |
|
| 997 |
static inline void pushw(struct vm86_regs *r, int val) |
| 998 |
{
|
| 999 |
r->esp = (r->esp & ~0xffff) | ((r->esp - 2) & 0xffff); |
| 1000 |
*(uint16_t *)seg_to_linear(r->ss, r->esp) = val; |
| 1001 |
} |
| 1002 |
|
| 1003 |
#undef __syscall_return
|
| 1004 |
#define __syscall_return(type, res) \
|
| 1005 |
do { \
|
| 1006 |
return (type) (res); \
|
| 1007 |
} while (0) |
| 1008 |
|
| 1009 |
_syscall2(int, vm86, int, func, struct vm86plus_struct *, v86) |
| 1010 |
|
| 1011 |
extern char vm86_code_start; |
| 1012 |
extern char vm86_code_end; |
| 1013 |
|
| 1014 |
#define VM86_CODE_CS 0x100 |
| 1015 |
#define VM86_CODE_IP 0x100 |
| 1016 |
|
| 1017 |
void test_vm86(void) |
| 1018 |
{
|
| 1019 |
struct vm86plus_struct ctx;
|
| 1020 |
struct vm86_regs *r;
|
| 1021 |
uint8_t *vm86_mem; |
| 1022 |
int seg, ret;
|
| 1023 |
|
| 1024 |
vm86_mem = mmap((void *)0x00000000, 0x110000, |
| 1025 |
PROT_WRITE | PROT_READ | PROT_EXEC, |
| 1026 |
MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0); |
| 1027 |
if (vm86_mem == MAP_FAILED) {
|
| 1028 |
printf("ERROR: could not map vm86 memory");
|
| 1029 |
return;
|
| 1030 |
} |
| 1031 |
memset(&ctx, 0, sizeof(ctx)); |
| 1032 |
|
| 1033 |
/* init basic registers */
|
| 1034 |
r = &ctx.regs; |
| 1035 |
r->eip = VM86_CODE_IP; |
| 1036 |
r->esp = 0xfffe;
|
| 1037 |
seg = VM86_CODE_CS; |
| 1038 |
r->cs = seg; |
| 1039 |
r->ss = seg; |
| 1040 |
r->ds = seg; |
| 1041 |
r->es = seg; |
| 1042 |
r->fs = seg; |
| 1043 |
r->gs = seg; |
| 1044 |
r->eflags = VIF_MASK; |
| 1045 |
|
| 1046 |
/* move code to proper address. We use the same layout as a .com
|
| 1047 |
dos program. */
|
| 1048 |
memcpy(vm86_mem + (VM86_CODE_CS << 4) + VM86_CODE_IP,
|
| 1049 |
&vm86_code_start, &vm86_code_end - &vm86_code_start); |
| 1050 |
|
| 1051 |
/* mark int 0x21 as being emulated */
|
| 1052 |
set_bit((uint8_t *)&ctx.int_revectored, 0x21);
|
| 1053 |
|
| 1054 |
for(;;) {
|
| 1055 |
ret = vm86(VM86_ENTER, &ctx); |
| 1056 |
switch(VM86_TYPE(ret)) {
|
| 1057 |
case VM86_INTx:
|
| 1058 |
{
|
| 1059 |
int int_num, ah;
|
| 1060 |
|
| 1061 |
int_num = VM86_ARG(ret); |
| 1062 |
if (int_num != 0x21) |
| 1063 |
goto unknown_int;
|
| 1064 |
ah = (r->eax >> 8) & 0xff; |
| 1065 |
switch(ah) {
|
| 1066 |
case 0x00: /* exit */ |
| 1067 |
goto the_end;
|
| 1068 |
case 0x02: /* write char */ |
| 1069 |
{
|
| 1070 |
uint8_t c = r->edx; |
| 1071 |
putchar(c); |
| 1072 |
} |
| 1073 |
break;
|
| 1074 |
case 0x09: /* write string */ |
| 1075 |
{
|
| 1076 |
uint8_t c, *ptr; |
| 1077 |
ptr = seg_to_linear(r->ds, r->edx); |
| 1078 |
for(;;) {
|
| 1079 |
c = *ptr++; |
| 1080 |
if (c == '$') |
| 1081 |
break;
|
| 1082 |
putchar(c); |
| 1083 |
} |
| 1084 |
r->eax = (r->eax & ~0xff) | '$'; |
| 1085 |
} |
| 1086 |
break;
|
| 1087 |
case 0xff: /* extension: write hex number in edx */ |
| 1088 |
printf("%08x\n", (int)r->edx); |
| 1089 |
break;
|
| 1090 |
default:
|
| 1091 |
unknown_int:
|
| 1092 |
printf("unsupported int 0x%02x\n", int_num);
|
| 1093 |
goto the_end;
|
| 1094 |
} |
| 1095 |
} |
| 1096 |
break;
|
| 1097 |
case VM86_SIGNAL:
|
| 1098 |
/* a signal came, we just ignore that */
|
| 1099 |
break;
|
| 1100 |
case VM86_STI:
|
| 1101 |
break;
|
| 1102 |
default:
|
| 1103 |
printf("ERROR: unhandled vm86 return code (0x%x)\n", ret);
|
| 1104 |
goto the_end;
|
| 1105 |
} |
| 1106 |
} |
| 1107 |
the_end:
|
| 1108 |
printf("VM86 end\n");
|
| 1109 |
munmap(vm86_mem, 0x110000);
|
| 1110 |
} |
| 1111 |
|
| 1112 |
/* exception tests */
|
| 1113 |
#ifndef REG_EAX
|
| 1114 |
#define REG_EAX EAX
|
| 1115 |
#define REG_EBX EBX
|
| 1116 |
#define REG_ECX ECX
|
| 1117 |
#define REG_EDX EDX
|
| 1118 |
#define REG_ESI ESI
|
| 1119 |
#define REG_EDI EDI
|
| 1120 |
#define REG_EBP EBP
|
| 1121 |
#define REG_ESP ESP
|
| 1122 |
#define REG_EIP EIP
|
| 1123 |
#define REG_EFL EFL
|
| 1124 |
#define REG_TRAPNO TRAPNO
|
| 1125 |
#define REG_ERR ERR
|
| 1126 |
#endif
|
| 1127 |
|
| 1128 |
jmp_buf jmp_env; |
| 1129 |
int v1;
|
| 1130 |
int tab[2]; |
| 1131 |
|
| 1132 |
void sig_handler(int sig, siginfo_t *info, void *puc) |
| 1133 |
{
|
| 1134 |
struct ucontext *uc = puc;
|
| 1135 |
|
| 1136 |
printf("si_signo=%d si_errno=%d si_code=%d",
|
| 1137 |
info->si_signo, info->si_errno, info->si_code); |
| 1138 |
printf(" si_addr=0x%08lx",
|
| 1139 |
(unsigned long)info->si_addr); |
| 1140 |
printf("\n");
|
| 1141 |
|
| 1142 |
printf("trapno=0x%02x err=0x%08x",
|
| 1143 |
uc->uc_mcontext.gregs[REG_TRAPNO], |
| 1144 |
uc->uc_mcontext.gregs[REG_ERR]); |
| 1145 |
printf(" EIP=0x%08x", uc->uc_mcontext.gregs[REG_EIP]);
|
| 1146 |
printf("\n");
|
| 1147 |
longjmp(jmp_env, 1);
|
| 1148 |
} |
| 1149 |
|
| 1150 |
void test_exceptions(void) |
| 1151 |
{
|
| 1152 |
struct modify_ldt_ldt_s ldt;
|
| 1153 |
struct sigaction act;
|
| 1154 |
volatile int val; |
| 1155 |
|
| 1156 |
act.sa_sigaction = sig_handler; |
| 1157 |
sigemptyset(&act.sa_mask); |
| 1158 |
act.sa_flags = SA_SIGINFO; |
| 1159 |
sigaction(SIGFPE, &act, NULL);
|
| 1160 |
sigaction(SIGILL, &act, NULL);
|
| 1161 |
sigaction(SIGSEGV, &act, NULL);
|
| 1162 |
sigaction(SIGBUS, &act, NULL);
|
| 1163 |
sigaction(SIGTRAP, &act, NULL);
|
| 1164 |
|
| 1165 |
/* test division by zero reporting */
|
| 1166 |
printf("DIVZ exception:\n");
|
| 1167 |
if (setjmp(jmp_env) == 0) { |
| 1168 |
/* now divide by zero */
|
| 1169 |
v1 = 0;
|
| 1170 |
v1 = 2 / v1;
|
| 1171 |
} |
| 1172 |
|
| 1173 |
printf("BOUND exception:\n");
|
| 1174 |
if (setjmp(jmp_env) == 0) { |
| 1175 |
/* bound exception */
|
| 1176 |
tab[0] = 1; |
| 1177 |
tab[1] = 10; |
| 1178 |
asm volatile ("bound %0, %1" : : "r" (11), "m" (tab)); |
| 1179 |
} |
| 1180 |
|
| 1181 |
printf("segment exceptions:\n");
|
| 1182 |
if (setjmp(jmp_env) == 0) { |
| 1183 |
/* load an invalid segment */
|
| 1184 |
asm volatile ("movl %0, %%fs" : : "r" ((0x1234 << 3) | 1)); |
| 1185 |
} |
| 1186 |
if (setjmp(jmp_env) == 0) { |
| 1187 |
/* null data segment is valid */
|
| 1188 |
asm volatile ("movl %0, %%fs" : : "r" (3)); |
| 1189 |
/* null stack segment */
|
| 1190 |
asm volatile ("movl %0, %%ss" : : "r" (3)); |
| 1191 |
} |
| 1192 |
|
| 1193 |
ldt.entry_number = 1;
|
| 1194 |
ldt.base_addr = (unsigned long)&seg_data1; |
| 1195 |
ldt.limit = (sizeof(seg_data1) + 0xfff) >> 12; |
| 1196 |
ldt.seg_32bit = 1;
|
| 1197 |
ldt.contents = MODIFY_LDT_CONTENTS_DATA; |
| 1198 |
ldt.read_exec_only = 0;
|
| 1199 |
ldt.limit_in_pages = 1;
|
| 1200 |
ldt.seg_not_present = 1;
|
| 1201 |
ldt.useable = 1;
|
| 1202 |
modify_ldt(1, &ldt, sizeof(ldt)); /* write ldt entry */ |
| 1203 |
|
| 1204 |
if (setjmp(jmp_env) == 0) { |
| 1205 |
/* segment not present */
|
| 1206 |
asm volatile ("movl %0, %%fs" : : "r" (MK_SEL(1))); |
| 1207 |
} |
| 1208 |
|
| 1209 |
/* test SEGV reporting */
|
| 1210 |
printf("PF exception:\n");
|
| 1211 |
if (setjmp(jmp_env) == 0) { |
| 1212 |
val = 1;
|
| 1213 |
/* now store in an invalid address */
|
| 1214 |
*(char *)0x1234 = 1; |
| 1215 |
} |
| 1216 |
|
| 1217 |
/* test SEGV reporting */
|
| 1218 |
printf("PF exception:\n");
|
| 1219 |
if (setjmp(jmp_env) == 0) { |
| 1220 |
val = 1;
|
| 1221 |
/* read from an invalid address */
|
| 1222 |
v1 = *(char *)0x1234; |
| 1223 |
} |
| 1224 |
|
| 1225 |
/* test illegal instruction reporting */
|
| 1226 |
printf("UD2 exception:\n");
|
| 1227 |
if (setjmp(jmp_env) == 0) { |
| 1228 |
/* now execute an invalid instruction */
|
| 1229 |
asm volatile("ud2"); |
| 1230 |
} |
| 1231 |
|
| 1232 |
printf("INT exception:\n");
|
| 1233 |
if (setjmp(jmp_env) == 0) { |
| 1234 |
asm volatile ("int $0xfd"); |
| 1235 |
} |
| 1236 |
if (setjmp(jmp_env) == 0) { |
| 1237 |
asm volatile ("int $0x01"); |
| 1238 |
} |
| 1239 |
if (setjmp(jmp_env) == 0) { |
| 1240 |
asm volatile (".byte 0xcd, 0x03"); |
| 1241 |
} |
| 1242 |
if (setjmp(jmp_env) == 0) { |
| 1243 |
asm volatile ("int $0x04"); |
| 1244 |
} |
| 1245 |
if (setjmp(jmp_env) == 0) { |
| 1246 |
asm volatile ("int $0x05"); |
| 1247 |
} |
| 1248 |
|
| 1249 |
printf("INT3 exception:\n");
|
| 1250 |
if (setjmp(jmp_env) == 0) { |
| 1251 |
asm volatile ("int3"); |
| 1252 |
} |
| 1253 |
|
| 1254 |
printf("CLI exception:\n");
|
| 1255 |
if (setjmp(jmp_env) == 0) { |
| 1256 |
asm volatile ("cli"); |
| 1257 |
} |
| 1258 |
|
| 1259 |
printf("STI exception:\n");
|
| 1260 |
if (setjmp(jmp_env) == 0) { |
| 1261 |
asm volatile ("cli"); |
| 1262 |
} |
| 1263 |
|
| 1264 |
printf("INTO exception:\n");
|
| 1265 |
if (setjmp(jmp_env) == 0) { |
| 1266 |
/* overflow exception */
|
| 1267 |
asm volatile ("addl $1, %0 ; into" : : "r" (0x7fffffff)); |
| 1268 |
} |
| 1269 |
|
| 1270 |
printf("OUTB exception:\n");
|
| 1271 |
if (setjmp(jmp_env) == 0) { |
| 1272 |
asm volatile ("outb %%al, %%dx" : : "d" (0x4321), "a" (0)); |
| 1273 |
} |
| 1274 |
|
| 1275 |
printf("INB exception:\n");
|
| 1276 |
if (setjmp(jmp_env) == 0) { |
| 1277 |
asm volatile ("inb %%dx, %%al" : "=a" (val) : "d" (0x4321)); |
| 1278 |
} |
| 1279 |
|
| 1280 |
printf("REP OUTSB exception:\n");
|
| 1281 |
if (setjmp(jmp_env) == 0) { |
| 1282 |
asm volatile ("rep outsb" : : "d" (0x4321), "S" (tab), "c" (1)); |
| 1283 |
} |
| 1284 |
|
| 1285 |
printf("REP INSB exception:\n");
|
| 1286 |
if (setjmp(jmp_env) == 0) { |
| 1287 |
asm volatile ("rep insb" : : "d" (0x4321), "D" (tab), "c" (1)); |
| 1288 |
} |
| 1289 |
|
| 1290 |
printf("HLT exception:\n");
|
| 1291 |
if (setjmp(jmp_env) == 0) { |
| 1292 |
asm volatile ("hlt"); |
| 1293 |
} |
| 1294 |
|
| 1295 |
printf("single step exception:\n");
|
| 1296 |
val = 0;
|
| 1297 |
if (setjmp(jmp_env) == 0) { |
| 1298 |
asm volatile ("pushf\n" |
| 1299 |
"orl $0x00100, (%%esp)\n"
|
| 1300 |
"popf\n"
|
| 1301 |
"movl $0xabcd, %0\n"
|
| 1302 |
"movl $0x0, %0\n" : "=m" (val) : : "cc", "memory"); |
| 1303 |
} |
| 1304 |
printf("val=0x%x\n", val);
|
| 1305 |
} |
| 1306 |
|
| 1307 |
/* self modifying code test */
|
| 1308 |
uint8_t code[] = {
|
| 1309 |
0xb8, 0x1, 0x00, 0x00, 0x00, /* movl $1, %eax */ |
| 1310 |
0xc3, /* ret */ |
| 1311 |
}; |
| 1312 |
|
| 1313 |
typedef int FuncType(void); |
| 1314 |
|
| 1315 |
void test_self_modifying_code(void) |
| 1316 |
{
|
| 1317 |
int i;
|
| 1318 |
|
| 1319 |
printf("self modifying code:\n");
|
| 1320 |
printf("func1 = 0x%x\n", ((FuncType *)code)());
|
| 1321 |
for(i = 2; i <= 4; i++) { |
| 1322 |
code[1] = i;
|
| 1323 |
printf("func%d = 0x%x\n", i, ((FuncType *)code)());
|
| 1324 |
} |
| 1325 |
} |
| 1326 |
|
| 1327 |
static void *call_end __init_call = NULL; |
| 1328 |
|
| 1329 |
int main(int argc, char **argv) |
| 1330 |
{
|
| 1331 |
void **ptr;
|
| 1332 |
void (*func)(void); |
| 1333 |
|
| 1334 |
ptr = &call_start + 1;
|
| 1335 |
while (*ptr != NULL) { |
| 1336 |
func = *ptr++; |
| 1337 |
func(); |
| 1338 |
} |
| 1339 |
test_bsx(); |
| 1340 |
test_mul(); |
| 1341 |
test_jcc(); |
| 1342 |
test_floats(); |
| 1343 |
test_bcd(); |
| 1344 |
test_xchg(); |
| 1345 |
test_string(); |
| 1346 |
test_misc(); |
| 1347 |
test_lea(); |
| 1348 |
test_segs(); |
| 1349 |
test_code16(); |
| 1350 |
test_vm86(); |
| 1351 |
test_exceptions(); |
| 1352 |
test_self_modifying_code(); |
| 1353 |
return 0; |
| 1354 |
} |