mirror of
https://github.com/yuzu-emu/unicorn.git
synced 2024-12-23 22:55:32 +00:00
4a62409949
* arm64eb: arm64 big endian also using little endian instructions. * arm64: using another example that depends on endians. example: 1. store a word: 0x12345678 2. load a byte: * little endian : 0x78 * big endian : 0x12
102 lines
3 KiB
C
102 lines
3 KiB
C
/* Unicorn Emulator Engine */
|
|
/* By Nguyen Anh Quynh, 2015 */
|
|
/* modify from arm64 sample zhangwm, 2017 */
|
|
|
|
/* Sample code to demonstrate how to emulate ARM64EB code */
|
|
|
|
#include <unicorn/unicorn.h>
|
|
#include <string.h>
|
|
|
|
// code to be emulated
|
|
#define ARM_CODE "\xab\x05\x00\xb8\xaf\x05\x40\x38" // str x11, [x13]; ldrb x15, [x13]
|
|
|
|
// memory address where emulation starts
|
|
#define ADDRESS 0x10000
|
|
|
|
static void hook_block(uc_engine *uc, uint64_t address, uint32_t size, void *user_data)
|
|
{
|
|
printf(">>> Tracing basic block at 0x%"PRIx64 ", block size = 0x%x\n", address, size);
|
|
}
|
|
|
|
static void hook_code(uc_engine *uc, uint64_t address, uint32_t size, void *user_data)
|
|
{
|
|
printf(">>> Tracing instruction at 0x%"PRIx64 ", instruction size = 0x%x\n", address, size);
|
|
}
|
|
|
|
static void test_arm64(void)
|
|
{
|
|
uc_engine *uc;
|
|
uc_err err;
|
|
uc_hook trace1, trace2;
|
|
|
|
int64_t x11 = 0x12345678; // X11 register
|
|
int64_t x13 = 0x10000 + 0x8; // X13 register
|
|
int64_t x15 = 0x33; // X15 register
|
|
|
|
printf("Emulate ARM64 Big-Endian code\n");
|
|
|
|
// Initialize emulator in ARM mode
|
|
err = uc_open(UC_ARCH_ARM64, UC_MODE_ARM + UC_MODE_BIG_ENDIAN, &uc);
|
|
if (err) {
|
|
printf("Failed on uc_open() with error returned: %u (%s)\n",
|
|
err, uc_strerror(err));
|
|
return;
|
|
}
|
|
|
|
// map 2MB memory for this emulation
|
|
uc_mem_map(uc, ADDRESS, 2 * 1024 * 1024, UC_PROT_ALL);
|
|
|
|
// write machine code to be emulated to memory
|
|
uc_mem_write(uc, ADDRESS, ARM_CODE, sizeof(ARM_CODE) - 1);
|
|
|
|
// initialize machine registers
|
|
uc_reg_write(uc, UC_ARM64_REG_X11, &x11);
|
|
uc_reg_write(uc, UC_ARM64_REG_X13, &x13);
|
|
uc_reg_write(uc, UC_ARM64_REG_X15, &x15);
|
|
|
|
// tracing all basic blocks with customized callback
|
|
uc_hook_add(uc, &trace1, UC_HOOK_BLOCK, hook_block, NULL, 1, 0);
|
|
|
|
// tracing one instruction at ADDRESS with customized callback
|
|
uc_hook_add(uc, &trace2, UC_HOOK_CODE, hook_code, NULL, ADDRESS, ADDRESS);
|
|
|
|
// emulate machine code in infinite time (last param = 0), or when
|
|
// finishing all the code.
|
|
err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(ARM_CODE) -1, 0, 0);
|
|
if (err) {
|
|
printf("Failed on uc_emu_start() with error returned: %u\n", err);
|
|
}
|
|
|
|
// now print out some registers
|
|
printf(">>> Emulation done. Below is the CPU context\n");
|
|
printf(">>> As big endian, X15 should be 0x12:\n");
|
|
|
|
uc_reg_read(uc, UC_ARM64_REG_X15, &x15);
|
|
printf(">>> X15 = 0x%" PRIx64 "\n", x15);
|
|
|
|
uc_close(uc);
|
|
}
|
|
|
|
int main(int argc, char **argv, char **envp)
|
|
{
|
|
// dynamically load shared library
|
|
#ifdef DYNLOAD
|
|
if (!uc_dyn_load(NULL, 0)) {
|
|
printf("Error dynamically loading shared library.\n");
|
|
printf("Please check that unicorn.dll/unicorn.so is available as well as\n");
|
|
printf("any other dependent dll/so files.\n");
|
|
printf("The easiest way is to place them in the same directory as this app.\n");
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
test_arm64();
|
|
|
|
// dynamically free shared library
|
|
#ifdef DYNLOAD
|
|
uc_dyn_free();
|
|
#endif
|
|
|
|
return 0;
|
|
}
|