test_tms320c64x.c

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/* Capstone Disassembly Engine */
/* TMS320C64x Backend by Fotis Loukos <me@fotisl.com> 2016 */
 
#include <stdio.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 void print_insn_detail(cs_insn *ins)
{
    cs_tms320c64x *tms320c64x;
    int i;
 
    // detail can be NULL on "data" instruction if SKIPDATA option is turned ON
    if (ins->detail == NULL)
        return;
 
    tms320c64x = &(ins->detail->tms320c64x);
    if (tms320c64x->op_count)
        printf("\top_count: %u\n", tms320c64x->op_count);
 
    for (i = 0; i < tms320c64x->op_count; i++) {
        cs_tms320c64x_op *op = &(tms320c64x->operands[i]);
        switch((int)op->type) {
            default:
                break;
            case TMS320C64X_OP_REG:
                printf("\t\toperands[%u].type: REG = %s\n", i, cs_reg_name(handle, op->reg));
                break;
            case TMS320C64X_OP_IMM:
                printf("\t\toperands[%u].type: IMM = 0x%x\n", i, op->imm);
                break;
            case TMS320C64X_OP_MEM:
                printf("\t\toperands[%u].type: MEM\n", i);
                if (op->mem.base != TMS320C64X_REG_INVALID)
                    printf("\t\t\toperands[%u].mem.base: REG = %s\n",
                            i, cs_reg_name(handle, op->mem.base));
                printf("\t\t\toperands[%u].mem.disptype: ", i);
                if(op->mem.disptype == TMS320C64X_MEM_DISP_INVALID) {
                    printf("Invalid\n");
                    printf("\t\t\toperands[%u].mem.disp: %u\n", i, op->mem.disp);
                }
                if(op->mem.disptype == TMS320C64X_MEM_DISP_CONSTANT) {
                    printf("Constant\n");
                    printf("\t\t\toperands[%u].mem.disp: %u\n", i, op->mem.disp);
                }
                if(op->mem.disptype == TMS320C64X_MEM_DISP_REGISTER) {
                    printf("Register\n");
                    printf("\t\t\toperands[%u].mem.disp: %s\n", i, cs_reg_name(handle, op->mem.disp));
                }
                printf("\t\t\toperands[%u].mem.unit: %u\n", i, op->mem.unit);
                printf("\t\t\toperands[%u].mem.direction: ", i);
                if(op->mem.direction == TMS320C64X_MEM_DIR_INVALID)
                    printf("Invalid\n");
                if(op->mem.direction == TMS320C64X_MEM_DIR_FW)
                    printf("Forward\n");
                if(op->mem.direction == TMS320C64X_MEM_DIR_BW)
                    printf("Backward\n");
                printf("\t\t\toperands[%u].mem.modify: ", i);
                if(op->mem.modify == TMS320C64X_MEM_MOD_INVALID)
                    printf("Invalid\n");
                if(op->mem.modify == TMS320C64X_MEM_MOD_NO)
                    printf("No\n");
                if(op->mem.modify == TMS320C64X_MEM_MOD_PRE)
                    printf("Pre\n");
                if(op->mem.modify == TMS320C64X_MEM_MOD_POST)
                    printf("Post\n");
                printf("\t\t\toperands[%u].mem.scaled: %u\n", i, op->mem.scaled);
 
 
                break;
            case TMS320C64X_OP_REGPAIR:
                printf("\t\toperands[%u].type: REGPAIR = %s:%s\n", i, cs_reg_name(handle, op->reg + 1), cs_reg_name(handle, op->reg));
                break;
        }
    }
 
    printf("\tFunctional unit: ");
    switch(tms320c64x->funit.unit) {
        case TMS320C64X_FUNIT_D:
            printf("D%u\n", tms320c64x->funit.side);
            break;
        case TMS320C64X_FUNIT_L:
            printf("L%u\n", tms320c64x->funit.side);
            break;
        case TMS320C64X_FUNIT_M:
            printf("M%u\n", tms320c64x->funit.side);
            break;
        case TMS320C64X_FUNIT_S:
            printf("S%u\n", tms320c64x->funit.side);
            break;
        case TMS320C64X_FUNIT_NO:
            printf("No Functional Unit\n");
            break;
        default:
            printf("Unknown (Unit %u, Side %u)\n", tms320c64x->funit.unit, tms320c64x->funit.side);
            break;
    }
    if(tms320c64x->funit.crosspath == 1)
        printf("\tCrosspath: 1\n");
 
    if(tms320c64x->condition.reg != TMS320C64X_REG_INVALID)
        printf("\tCondition: [%c%s]\n", (tms320c64x->condition.zero == 1) ? '!' : ' ', cs_reg_name(handle, tms320c64x->condition.reg));
    printf("\tParallel: %s\n", (tms320c64x->parallel == 1) ? "true" : "false");
 
    printf("\n");
}
 
static void test()
{
#define TMS320C64X_CODE "\x01\xac\x88\x40\x81\xac\x88\x43\x00\x00\x00\x00\x02\x90\x32\x96\x02\x80\x46\x9e\x05\x3c\x83\xe6\x0b\x0c\x8b\x24"
 
    struct platform platforms[] = {
        {
            CS_ARCH_TMS320C64X,
            CS_MODE_BIG_ENDIAN,
            (unsigned char*)TMS320C64X_CODE,
            sizeof(TMS320C64X_CODE) - 1,
            "TMS320C64x",
        },
    };
 
    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);
            continue;
        }
 
        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");
        }
 
        printf("\n");
 
        cs_close(&handle);
    }
}
 
int main()
{
    test();
 
    return 0;
}