105 lines
2.5 KiB
C
105 lines
2.5 KiB
C
// Test PC change during the callback. by Nguyen Anh Quynh, 2016
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#include "unicorn_test.h"
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#include <inttypes.h>
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#define OK(x) uc_assert_success(x)
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/* Called before every test to set up a new instance */
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static int setup32(void **state)
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{
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uc_engine *uc;
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OK(uc_open(UC_ARCH_X86, UC_MODE_32, &uc));
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*state = uc;
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return 0;
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}
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/* Called after every test to clean up */
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static int teardown(void **state)
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{
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uc_engine *uc = *state;
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OK(uc_close(uc));
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*state = NULL;
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return 0;
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}
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/******************************************************************************/
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static void test_code_hook(uc_engine *uc, uint64_t address, uint32_t size, void *user_data)
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{
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uint8_t tmp[256];
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int32_t r_eip = 0x1000006;
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printf("instruction at 0x%"PRIx64": ", address);
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if (!uc_mem_read(uc, address, tmp, size)) {
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uint32_t i;
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for (i = 0; i < size; i++) {
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printf("0x%x ", tmp[i]);
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}
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printf("\n");
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}
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if (address == 0x1000003) {
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// change the PC to "inc EDX"
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uc_reg_write(uc, UC_X86_REG_EIP, &r_eip);
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}
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}
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static void test_pc_change(void **state)
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{
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uc_engine *uc = *state;
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uc_hook trace1;
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int32_t r_ecx = 3, r_edx = 15;
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#define BASEADDR 0x1000000
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uint64_t address = BASEADDR;
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const uint8_t code[] = {
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0x41, // inc ECX @0x1000000
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0x41, // inc ECX
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0x41, // inc ECX
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0x41, // inc ECX @0x1000003
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0x41, // inc ECX
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0x41, // inc ECX
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0x42, // inc EDX @0x1000006
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0x42, // inc EDX
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};
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#undef BASEADDR
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// map 2MB memory for this emulation
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OK(uc_mem_map(uc, address, 2 * 1024 * 1024, UC_PROT_ALL));
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// write machine code to be emulated to memory
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OK(uc_mem_write(uc, address, code, sizeof(code)));
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uc_reg_write(uc, UC_X86_REG_ECX, &r_ecx);
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uc_reg_write(uc, UC_X86_REG_EDX, &r_edx);
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printf("ECX = %u, EDX = %u\n", r_ecx, r_edx);
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// trace all instructions
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OK(uc_hook_add(uc, &trace1, UC_HOOK_CODE, test_code_hook, NULL, 1, 0));
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OK(uc_emu_start(uc, address, address+sizeof(code), 0, 0));
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uc_reg_read(uc, UC_X86_REG_ECX, &r_ecx);
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uc_reg_read(uc, UC_X86_REG_EDX, &r_edx);
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printf("ECX = %u, EDX = %u\n", r_ecx, r_edx);
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assert_int_equal(r_ecx, 6);
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assert_int_equal(r_edx, 17);
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}
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int main(void)
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{
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const struct CMUnitTest tests[] = {
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cmocka_unit_test_setup_teardown(test_pc_change, setup32, teardown),
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};
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return cmocka_run_group_tests(tests, NULL, NULL);
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}
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