test_mos65xx.c

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/* Capstone Disassembler Engine */
/* By Sebastian Macke <sebastian@macke.de>, 2018 */
 
#include <stdio.h>
#include <stdlib.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");
}
 
static const char *get_am_name(mos65xx_address_mode mode)
{
        switch(mode) {
                default:
                case MOS65XX_AM_NONE:
                        return "No address mode";
                case MOS65XX_AM_IMP:
                        return "implied addressing (no addressing mode)";
                case MOS65XX_AM_ACC:
                        return "accumulator addressing";
                case MOS65XX_AM_ABS:
                        return "absolute addressing";
                case MOS65XX_AM_ZP:
                        return "zeropage addressing";
                case MOS65XX_AM_IMM:
                        return "8 Bit immediate value";
                case MOS65XX_AM_ABSX:
                        return "indexed absolute addressing by the X index register";
                case MOS65XX_AM_ABSY:
                        return "indexed absolute addressing by the Y index register";
                case MOS65XX_AM_INDX:
                        return "indexed indirect addressing by the X index register";
                case MOS65XX_AM_INDY:
                        return "indirect indexed addressing by the Y index register";
                case MOS65XX_AM_ZPX:
                        return "indexed zeropage addressing by the X index register";
                case MOS65XX_AM_ZPY:
                        return "indexed zeropage addressing by the Y index register";
                case MOS65XX_AM_REL:
                        return "relative addressing used by branches";
                case MOS65XX_AM_IND:
                        return "absolute indirect addressing";
        }
}
 
 
static void print_insn_detail(cs_insn *ins)
{
        cs_mos65xx *mos65xx;
        int i;
 
        // detail can be NULL on "data" instruction if SKIPDATA option is turned ON
        if (ins->detail == NULL)
                return;
 
        mos65xx = &(ins->detail->mos65xx);
 
        // printf("insn_detail\n");
        printf("\taddress mode: %s\n", get_am_name(mos65xx->am));
        printf("\tmodifies flags: %s\n", mos65xx->modifies_flags ? "true": "false");
 
        if (mos65xx->op_count)
                printf("\top_count: %u\n", mos65xx->op_count);
 
        for (i = 0; i < mos65xx->op_count; i++) {
                cs_mos65xx_op *op = &(mos65xx->operands[i]);
                switch((int)op->type) {
                        default:
                                break;
                        case MOS65XX_OP_REG:
                                printf("\t\toperands[%u].type: REG = %s\n", i, cs_reg_name(handle, op->reg));
                                break;
                        case MOS65XX_OP_IMM:
                                printf("\t\toperands[%u].type: IMM = 0x%x\n", i, op->imm);
                                break;
                        case MOS65XX_OP_MEM:
                                printf("\t\toperands[%u].type: MEM = 0x%x\n", i, op->mem);
                                break;
                }
        }
}
 
static void test()
{
#define MOS65XX_CODE "\x0d\x34\x12\x00\x81\x87\x6c\x01\x00\x85\xFF\x10\x00\x19\x42\x42\x00\x49\x42"
 
        struct platform platforms[] = {
                {
                        CS_ARCH_MOS65XX,
                        0,
                        (unsigned char *)MOS65XX_CODE,
                        sizeof(MOS65XX_CODE) - 1,
                        "MOS65XX"
                },
        };
 
        uint64_t address = 0x1000;
        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]);
                                puts("");
                        }
                        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;
}