test_m68k.c

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/* Capstone Disassembler Engine */
/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013-2019 */
 
#include <stdio.h>
 
#include <capstone/platform.h>
#include <capstone/capstone.h>
 
struct platform {
    cs_arch arch;
    cs_mode mode;
    unsigned char* code;
    size_t size;
    const char* comment;
};
 
static csh handle;
 
static void print_string_hex(const char* comment, unsigned char* str, size_t len)
{
    unsigned char *c;
 
    printf("%s", comment);
    for (c = str; c < str + len; c++) {
        printf("0x%02x ", *c & 0xff);
    }
 
    printf("\n");
}
 
const char* s_addressing_modes[] = {
    "<invalid mode>",
 
    "Register Direct - Data",
    "Register Direct - Address",
 
    "Register Indirect - Address",
    "Register Indirect - Address with Postincrement",
    "Register Indirect - Address with Predecrement",
    "Register Indirect - Address with Displacement",
 
    "Address Register Indirect With Index - 8-bit displacement",
    "Address Register Indirect With Index - Base displacement",
 
    "Memory indirect - Postindex",
    "Memory indirect - Preindex",
 
    "Program Counter Indirect - with Displacement",
 
    "Program Counter Indirect with Index - with 8-Bit Displacement",
    "Program Counter Indirect with Index - with Base Displacement",
 
    "Program Counter Memory Indirect - Postindexed",
    "Program Counter Memory Indirect - Preindexed",
 
    "Absolute Data Addressing  - Short",
    "Absolute Data Addressing  - Long",
    "Immediate value",
};
 
static void print_read_write_regs(cs_detail* detail)
{
    int i;
 
    for (i = 0; i < detail->regs_read_count; ++i)
    {
        uint16_t reg_id = detail->regs_read[i];
        const char* reg_name = cs_reg_name(handle, reg_id);
        printf("\treading from reg: %s\n", reg_name);
    }
 
    for (i = 0; i < detail->regs_write_count; ++i)
    {
        uint16_t reg_id = detail->regs_write[i];
        const char* reg_name = cs_reg_name(handle, reg_id);
        printf("\twriting to reg:   %s\n", reg_name);
    }
}
 
static void print_insn_detail(cs_insn *ins)
{
    cs_m68k* m68k;
    cs_detail* detail;
    int i;
 
    // detail can be NULL on "data" instruction if SKIPDATA option is turned ON
    if (ins->detail == NULL)
        return;
 
    detail = ins->detail;
    m68k = &detail->m68k;
    if (m68k->op_count)
        printf("\top_count: %u\n", m68k->op_count);
 
    print_read_write_regs(detail);
 
    printf("\tgroups_count: %u\n", detail->groups_count);
 
    for (i = 0; i < m68k->op_count; i++) {
        cs_m68k_op* op = &(m68k->operands[i]);
 
        switch((int)op->type) {
            default:
                break;
            case M68K_OP_REG:
                printf("\t\toperands[%u].type: REG = %s\n", i, cs_reg_name(handle, op->reg));
                break;
            case M68K_OP_IMM:
                printf("\t\toperands[%u].type: IMM = 0x%x\n", i, (int)op->imm);
                break;
            case M68K_OP_MEM:
                printf("\t\toperands[%u].type: MEM\n", i);
                if (op->mem.base_reg != M68K_REG_INVALID)
                    printf("\t\t\toperands[%u].mem.base: REG = %s\n",
                            i, cs_reg_name(handle, op->mem.base_reg));
                if (op->mem.index_reg != M68K_REG_INVALID) {
                    printf("\t\t\toperands[%u].mem.index: REG = %s\n",
                            i, cs_reg_name(handle, op->mem.index_reg));
                    printf("\t\t\toperands[%u].mem.index: size = %c\n",
                            i, op->mem.index_size ? 'l' : 'w');
                }
                if (op->mem.disp != 0)
                    printf("\t\t\toperands[%u].mem.disp: 0x%x\n", i, op->mem.disp);
                if (op->mem.scale != 0)
                    printf("\t\t\toperands[%u].mem.scale: %d\n", i, op->mem.scale);
 
                printf("\t\taddress mode: %s\n", s_addressing_modes[op->address_mode]);
                break;
            case M68K_OP_FP_SINGLE:
                printf("\t\toperands[%u].type: FP_SINGLE\n", i);
                printf("\t\t\toperands[%u].simm: %f\n", i, op->simm);
                break;
            case M68K_OP_FP_DOUBLE:
                printf("\t\toperands[%u].type: FP_DOUBLE\n", i);
                printf("\t\t\toperands[%u].dimm: %lf\n", i, op->dimm);
                break;
            case M68K_OP_REG_BITS:
                printf("\t\toperands[%u].type: REG_BITS = $%x\n", i, op->register_bits);
                break;
            case M68K_OP_REG_PAIR:
                printf("\t\toperands[%u].type: REG_PAIR = (%s, %s)\n", i,
                    cs_reg_name(handle, op->reg_pair.reg_0),
                    cs_reg_name(handle, op->reg_pair.reg_1));
                break;
        }
    }
 
    printf("\n");
}
 
static void test()
{
#define M68K_CODE "\x4C\x00\x54\x04\x48\xe7\xe0\x30\x4C\xDF\x0C\x07\xd4\x40\x87\x5a\x4e\x71\x02\xb4\xc0\xde\xc0\xde\x5c\x00\x1d\x80\x71\x12\x01\x23\xf2\x3c\x44\x22\x40\x49\x0e\x56\x54\xc5\xf2\x3c\x44\x00\x44\x7a\x00\x00\xf2\x00\x0a\x28\x4E\xB9\x00\x00\x00\x12\x4E\x75"
    struct platform platforms[] = {
        {
            CS_ARCH_M68K,
            (cs_mode)(CS_MODE_BIG_ENDIAN | CS_MODE_M68K_040),
            (unsigned char*)M68K_CODE,
            sizeof(M68K_CODE) - 1,
            "M68K",
        },
    };
 
    uint64_t address = 0x01000;
    cs_insn *insn;
    int i;
    size_t count;
 
    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);
            abort();
        }
 
        cs_option(handle, CS_OPT_DETAIL, CS_OPT_ON);
 
        count = cs_disasm(handle, platforms[i].code, platforms[i].size, address, 0, &insn);
        if (count) {
            size_t j;
 
            printf("****************\n");
            printf("Platform: %s\n", platforms[i].comment);
            print_string_hex("Code: ", platforms[i].code, platforms[i].size);
            printf("Disasm:\n");
 
            for (j = 0; j < count; j++) {
                printf("0x%" PRIx64 ":\t%s\t%s\n", insn[j].address, insn[j].mnemonic, insn[j].op_str);
                print_insn_detail(&insn[j]);
            }
            printf("0x%" PRIx64 ":\n", insn[j-1].address + insn[j-1].size);
 
            // free memory allocated by cs_disasm()
            cs_free(insn, count);
        } else {
            printf("****************\n");
            printf("Platform: %s\n", platforms[i].comment);
            print_string_hex("Code:", platforms[i].code, platforms[i].size);
            printf("ERROR: Failed to disasm given code!\n");
            abort();
        }
 
        printf("\n");
 
        cs_close(&handle);
    }
}
 
int main()
{
    test();
 
    return 0;
}