mirror of
https://github.com/yuzu-emu/unicorn
synced 2024-11-24 17:28:13 +00:00
86 lines
2.4 KiB
C
Executable file
86 lines
2.4 KiB
C
Executable file
#include <inttypes.h>
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#include <string.h>
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#include <unistd.h>
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#include <unicorn/unicorn.h>
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#define PROGRAM "\xeb\x08\x58\xc7\x00\x78\x56\x34\x12\x90\xe8\xf3\xff\xff\xff"
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/*
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bits 32
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jmp short bottom
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top:
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pop eax
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mov dword [eax], 0x12345678
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nop
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bottom:
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call top
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*/
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// callback for tracing instruction
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static void hook_code(uch handle, uint64_t address, uint32_t size, void *user_data)
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{
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uint32_t esp;
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printf(">>> Tracing instruction at 0x%"PRIx64 ", instruction size = 0x%x\n", address, size);
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uc_reg_read(handle, UC_X86_REG_ESP, &esp);
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printf(">>> --- ESP is 0x%x\n", esp);
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}
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#define STACK 0x500000
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#define STACK_SIZE 0x5000
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int main(int argc, char **argv, char **envp) {
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uch handle, trace2;
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uc_err err;
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uint8_t bytes[8];
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uint32_t esp;
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printf("Memory mapping test\n");
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// Initialize emulator in X86-32bit mode
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err = uc_open(UC_ARCH_X86, UC_MODE_32, &handle);
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if (err) {
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printf("Failed on uc_open() with error returned: %u\n", err);
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return;
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}
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uc_mem_map(handle, 0x100000, 0x1000);
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uc_mem_map(handle, 0x200000, 0x2000);
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uc_mem_map(handle, 0x300000, 0x3000);
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uc_mem_map_ex(handle, 0x400000, 0x4000, UC_PROT_READ | UC_PROT_EXEC);
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uc_mem_map_ex(handle, STACK, STACK_SIZE, UC_PROT_READ | UC_PROT_WRITE);
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esp = STACK + STACK_SIZE;
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uc_reg_write(handle, UC_X86_REG_ESP, &esp);
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// write machine code to be emulated to memory
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if (uc_mem_write(handle, 0x400000, PROGRAM, sizeof(PROGRAM))) {
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printf("Failed to write emulation code to memory, quit!\n");
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return;
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}
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else {
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printf("Allowed to write to read only memory via uc_mem_write\n");
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}
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//uc_hook_add(handle, &trace2, UC_HOOK_CODE, hook_code, NULL, (uint64_t)0x400000, (uint64_t)0x400fff);
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// emulate machine code in infinite time
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printf("BEGIN execution\n");
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err = uc_emu_start(handle, 0x400000, 0x400000 + sizeof(PROGRAM), 0, 5);
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if (err) {
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printf("Failed on uc_emu_start() with error returned %u: %s\n",
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err, uc_strerror(err));
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}
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printf("END execution\n");
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if (!uc_mem_read(handle, 0x400000 + sizeof(PROGRAM) - 1, bytes, 4))
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printf(">>> Read 4 bytes from [0x%x] = 0x%x\n", 0x400000 + sizeof(PROGRAM) - 1,*(uint32_t*) bytes);
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else
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printf(">>> Failed to read 4 bytes from [0x%x]\n", 0x400000 + sizeof(PROGRAM) - 1);
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uc_close(&handle);
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}
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