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;
}