mirror of
https://github.com/skyline-emu/skyline.git
synced 2024-11-14 18:25:09 +01:00
80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
#include <jni.h>
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#include <string>
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#include <unicorn/unicorn.h>
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#include <syslog.h>
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// code to be emulated
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#define ARM_CODE "\xab\x05\x00\xb8\xaf\x05\x40\x38" // str w11, [x13]; ldrb w15, [x13]
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// memory address where emulation starts
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#define ADDRESS 0x10000
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static void hook_block(uc_engine *uc, uint64_t address, uint32_t size, void *user_data)
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{
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syslog(LOG_DEBUG, ">>> Tracing basic block at 0x%" PRIx64 ", block size = 0x%x\n", size);
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}
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static void hook_code(uc_engine *uc, uint64_t address, uint32_t size, void *user_data)
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{
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syslog(LOG_DEBUG, ">>> Tracing instruction at 0x%" PRIx64 ", instruction size = 0x%x\n", size);
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}
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extern "C" JNIEXPORT jstring JNICALL
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Java_gq_cyuubi_lightswitch_MainActivity_stringFromJNI(
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JNIEnv *env,
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jobject /* this */) {
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uc_engine *uc;
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uc_err err;
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uc_hook trace1, trace2;
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int64_t x11 = 0x12345678; // X11 register
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int64_t x13 = 0x10000 + 0x8; // X13 register
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int64_t x15 = 0x33; // X15 register
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syslog(LOG_DEBUG, "Emulate ARM64 code\n");
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// Initialize emulator in ARM mode
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err = uc_open(UC_ARCH_ARM64, UC_MODE_ARM, &uc);
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if (err) {
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std::string finished = "failed!";
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return env->NewStringUTF(finished.c_str());
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}
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// map 2MB memory for this emulation
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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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uc_mem_write(uc, ADDRESS, ARM_CODE, sizeof(ARM_CODE) - 1);
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// initialize machine registers
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uc_reg_write(uc, UC_ARM64_REG_X11, &x11);
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uc_reg_write(uc, UC_ARM64_REG_X13, &x13);
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uc_reg_write(uc, UC_ARM64_REG_X15, &x15);
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// tracing all basic blocks with customized callback
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uc_hook_add(uc, &trace1, UC_HOOK_BLOCK, (void*)hook_block, NULL, 1, 0);
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// tracing one instruction at ADDRESS with customized callback
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uc_hook_add(uc, &trace2, UC_HOOK_CODE, (void*)hook_code, NULL, ADDRESS, ADDRESS);
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// emulate machine code in infinite time (last param = 0), or when
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// finishing all the code.
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err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(ARM_CODE) -1, 0, 0);
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if (err) {
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syslog(LOG_DEBUG, "Failed on uc_emu_start() with error returned: %u\n", err);
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}
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// now print out some registers
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syslog(LOG_DEBUG, ">>> Emulation done. Below is the CPU context\n");
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syslog(LOG_DEBUG, ">>> As little endian, X15 should be 0x78:\n");
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uc_reg_read(uc, UC_ARM64_REG_X15, &x15);
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syslog(LOG_DEBUG, ">>> X15 = 0x%" PRIx64 "\n", x15);
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uc_close(uc);
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std::string finished = "finished!";
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return env->NewStringUTF(finished.c_str());
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}
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