/* Capstone Disassembler Engine */
/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013> */

#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>

#include <capstone.h>

struct platform {
	cs_arch arch;
	cs_mode mode;
	unsigned char *code;
	size_t size;
	char *comment;
	cs_opt_type opt_type;
	cs_opt_value opt_value;
};

static void print_string_hex(unsigned char *str, int len)
{
	unsigned char *c;

	printf("Code: ");
	for (c = str; c < str + len; c++) {
		printf("0x%02x ", *c & 0xff);
	}
	printf("\n");
}

static void test()
{
#define X86_CODE16 "\x8d\x4c\x32\x08\x01\xd8\x81\xc6\x34\x12\x00\x00"
#define X86_CODE32 "\x8d\x4c\x32\x08\x01\xd8\x81\xc6\x34\x12\x00\x00"
#define X86_CODE64 "\x55\x48\x8b\x05\xb8\x13\x00\x00"
//#define ARM_CODE "\x04\xe0\x2d\xe5"
#define ARM_CODE "\xED\xFF\xFF\xEB\x04\xe0\x2d\xe5\x00\x00\x00\x00\xe0\x83\x22\xe5\xf1\x02\x03\x0e\x00\x00\xa0\xe3\x02\x30\xc1\xe7\x00\x00\x53\xe3"
#define ARM_CODE2 "\x10\xf1\x10\xe7\x11\xf2\x31\xe7\xdc\xa1\x2e\xf3\xe8\x4e\x62\xf3"
#define THUMB_CODE "\x70\x47\xeb\x46\x83\xb0\xc9\x68"
#define THUMB_CODE2 "\x4f\xf0\x00\x01\xbd\xe8\x00\x88\xd1\xe8\x00\xf0"
#define MIPS_CODE "\x0C\x10\x00\x97\x00\x00\x00\x00\x24\x02\x00\x0c\x8f\xa2\x00\x00\x34\x21\x34\x56"
#define MIPS_CODE2 "\x56\x34\x21\x34\xc2\x17\x01\x00"
//#define ARM64_CODE "\x00\x40\x21\x4b"	// 	sub		w0, w0, w1, uxtw
//#define ARM64_CODE "\x21\x7c\x02\x9b"	// mul	x1, x1, x2
//#define ARM64_CODE "\x20\x74\x0b\xd5"	// dc	zva, x0
//#define ARM64_CODE "\xe1\x0b\x40\xb9"	// ldr		w1, [sp, #0x8]
#define ARM64_CODE "\x21\x7c\x02\x9b\x21\x7c\x00\x53\x00\x40\x21\x4b\xe1\x0b\x40\xb9"

	struct platform platforms[] = {
		{ 
			.arch = CS_ARCH_X86,
			.mode = CS_MODE_16,
			.code = (unsigned char*)X86_CODE16,
			.size = sizeof(X86_CODE16) - 1,
			.comment = "X86 16bit (Intel syntax)"
		},
		{
			.arch = CS_ARCH_X86,
			.mode = CS_MODE_32,
			.code = (unsigned char*)X86_CODE32,
			.size = sizeof(X86_CODE32) - 1,
			.comment = "X86 32bit (ATT syntax)",
			.opt_type = CS_OPT_SYNTAX,
			.opt_value = CS_OPT_SYNTAX_ATT,
		},
		{
			.arch = CS_ARCH_X86,
			.mode = CS_MODE_32,
			.code = (unsigned char*)X86_CODE32,
			.size = sizeof(X86_CODE32) - 1,
			.comment = "X86 32 (Intel syntax)"
		},
		{
			.arch = CS_ARCH_X86,
			.mode = CS_MODE_64,
			.code = (unsigned char*)X86_CODE64,
			.size = sizeof(X86_CODE64) - 1,
			.comment = "X86 64 (Intel syntax)"
		},
		{ 
			.arch = CS_ARCH_ARM,
			.mode = CS_MODE_ARM,
			.code = (unsigned char*)ARM_CODE,
			.size = sizeof(ARM_CODE) - 1,
			.comment = "ARM"
		},
		{
			.arch = CS_ARCH_ARM,
			.mode = CS_MODE_THUMB,
			.code = (unsigned char*)THUMB_CODE2,
			.size = sizeof(THUMB_CODE2) - 1,
			.comment = "THUMB-2"
		},
		{ 
			.arch = CS_ARCH_ARM,
			.mode = CS_MODE_ARM,
			.code = (unsigned char*)ARM_CODE2,
			.size = sizeof(ARM_CODE2) - 1,
			.comment = "ARM: Cortex-A15 + NEON"
		},
		{
			.arch = CS_ARCH_ARM,
			.mode = CS_MODE_THUMB,
			.code = (unsigned char*)THUMB_CODE,
			.size = sizeof(THUMB_CODE) - 1,
			.comment = "THUMB"
		},
		{
			.arch = CS_ARCH_MIPS,
			.mode = CS_MODE_32 + CS_MODE_BIG_ENDIAN,
			.code = (unsigned char*)MIPS_CODE,
			.size = sizeof(MIPS_CODE) - 1,
			.comment = "MIPS-32 (Big-endian)"
		},
		{
			.arch = CS_ARCH_MIPS,
			.mode = CS_MODE_64+ CS_MODE_LITTLE_ENDIAN,
			.code = (unsigned char*)MIPS_CODE2,
			.size = sizeof(MIPS_CODE2) - 1,
			.comment = "MIPS-64-EL (Little-endian)"
		},
		{
			.arch = CS_ARCH_ARM64,
			.mode = CS_MODE_ARM,
			.code = (unsigned char*)ARM64_CODE,
			.size = sizeof(ARM64_CODE) - 1,
			.comment = "ARM-64"
		},
	};

	csh handle;
	uint64_t address = 0x1000;
	//cs_insn insn[16];
	cs_insn *insn;
	int i;

	for (i = 0; i < sizeof(platforms)/sizeof(platforms[0]); i++) {
		cs_err err = cs_open(platforms[i].arch, platforms[i].mode, &handle);
		if (err) {
			printf("Failed on cs_open() with error returned: %u\n", err);
			return;
		}

		if (platforms[i].opt_type)
			cs_option(handle, platforms[i].opt_type, platforms[i].opt_value);

		//size_t count = cs_disasm(handle, platforms[i].code, platforms[i].size, address, 0, insn);
		size_t count = cs_disasm_dyn(handle, platforms[i].code, platforms[i].size, address, 0, &insn);
		if (count) {
			printf("****************\n");
			printf("Platform: %s\n", platforms[i].comment);
			print_string_hex(platforms[i].code, platforms[i].size);
			printf("Disasm:\n");

			size_t j;

			for (j = 0; j < count; j++) {
				printf("0x%"PRIx64":\t%s\t\t%s\n",
						insn[j].address, insn[j].mnemonic, insn[j].op_str);
			}

			// print out the next offset, after the last insn
			printf("0x%"PRIx64":\n", insn[j-1].address + insn[j-1].size);

			// free memory allocated by cs_disasm_dyn()
			cs_free(insn);
		} else {
			printf("****************\n");
			printf("Platform: %s\n", platforms[i].comment);
			print_string_hex(platforms[i].code, platforms[i].size);
			printf("ERROR: Failed to disasm given code!\n");
		}

		printf("\n");

		cs_close(handle);
	}
}

int main()
{
	test();

#if 0
	#define offsetof(st, m) __builtin_offsetof(st, m)

	cs_insn insn;
	printf("size: %lu\n", sizeof(insn));
	printf("@id: %lu\n", offsetof(cs_insn, id));
	printf("@address: %lu\n", offsetof(cs_insn, address));
	printf("@size: %lu\n", offsetof(cs_insn, size));
	printf("@bytes: %lu\n", offsetof(cs_insn, bytes));
	printf("@mnemonic: %lu\n", offsetof(cs_insn, mnemonic));
	printf("@op_str: %lu\n", offsetof(cs_insn, op_str));
	printf("@regs_read: %lu\n", offsetof(cs_insn, regs_read));
	printf("@regs_read_count: %lu\n", offsetof(cs_insn, regs_read_count));
	printf("@regs_write: %lu\n", offsetof(cs_insn, regs_write));
	printf("@regs_write_count: %lu\n", offsetof(cs_insn, regs_write_count));
	printf("@groups: %lu\n", offsetof(cs_insn, groups));
	printf("@groups_count: %lu\n", offsetof(cs_insn, groups_count));
	printf("@arch: %lu\n", offsetof(cs_insn, x86));
#endif

	return 0;
}