cstool_m680x.c

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/* Capstone Disassembly Engine */
/* M680X Backend by Wolfgang Schwotzer <wolfgang.schwotzer@gmx.net> 2017 */
 
#include <stdio.h>
#include <capstone/capstone.h>
 
void print_string_hex(char *comment, unsigned char *str, size_t len);
 
static const char *s_access[] = {
    "UNCHANGED", "READ", "WRITE", "READ | WRITE",
};
 
void print_read_write_regs(csh handle, cs_detail *detail)
{
    int i;
 
    if (detail->regs_read_count > 0) {
        printf("\treading from regs: ");
 
        for (i = 0; i < detail->regs_read_count; ++i) {
            if (i > 0)
                printf(", ");
 
            printf("%s", cs_reg_name(handle, detail->regs_read[i]));
        }
 
        printf("\n");
    }
 
    if (detail->regs_write_count > 0) {
        printf("\twriting to regs: ");
 
        for (i = 0; i < detail->regs_write_count; ++i) {
            if (i > 0)
                printf(", ");
 
            printf("%s", cs_reg_name(handle,
                    detail->regs_write[i]));
        }
 
        printf("\n");
    }
}
 
void print_insn_detail_m680x(csh handle, cs_insn *insn)
{
    cs_detail *detail = insn->detail;
    cs_m680x *m680x = NULL;
    int i;
 
    // detail can be NULL on "data" instruction if SKIPDATA option is
    // turned ON
    if (detail == NULL)
        return;
 
    m680x = &detail->m680x;
 
    if (m680x->op_count)
        printf("\top_count: %u\n", m680x->op_count);
 
    for (i = 0; i < m680x->op_count; i++) {
        cs_m680x_op *op = &(m680x->operands[i]);
        const char *comment;
 
        switch ((int)op->type) {
        default:
            break;
 
        case M680X_OP_REGISTER:
            comment = "";
 
            if ((i == 0 && m680x->flags & M680X_FIRST_OP_IN_MNEM) ||
                (i == 1 && m680x->flags &
                    M680X_SECOND_OP_IN_MNEM))
                comment = " (in mnemonic)";
 
            printf("\t\toperands[%u].type: REGISTER = %s%s\n", i,
                cs_reg_name(handle, op->reg), comment);
            break;
 
        case M680X_OP_CONSTANT:
            printf("\t\toperands[%u].type: CONSTANT = %u\n", i,
                op->const_val);
            break;
 
        case M680X_OP_IMMEDIATE:
            printf("\t\toperands[%u].type: IMMEDIATE = #%d\n", i,
                op->imm);
            break;
 
        case M680X_OP_DIRECT:
            printf("\t\toperands[%u].type: DIRECT = 0x%02x\n", i,
                op->direct_addr);
            break;
 
        case M680X_OP_EXTENDED:
            printf("\t\toperands[%u].type: EXTENDED %s = 0x%04x\n",
                i, op->ext.indirect ? "INDIRECT" : "",
                op->ext.address);
            break;
 
        case M680X_OP_RELATIVE:
            printf("\t\toperands[%u].type: RELATIVE = 0x%04x\n", i,
                op->rel.address);
            break;
 
        case M680X_OP_INDEXED:
            printf("\t\toperands[%u].type: INDEXED%s\n", i,
                (op->idx.flags & M680X_IDX_INDIRECT) ?
                " INDIRECT" : "");
 
            if (op->idx.base_reg != M680X_REG_INVALID)
                printf("\t\t\tbase register: %s\n",
                    cs_reg_name(handle, op->idx.base_reg));
 
            if (op->idx.offset_reg != M680X_REG_INVALID)
                printf("\t\t\toffset register: %s\n",
                    cs_reg_name(handle, op->idx.offset_reg));
 
            if ((op->idx.offset_bits != 0) &&
                (op->idx.offset_reg == M680X_REG_INVALID) &&
                !op->idx.inc_dec) {
                printf("\t\t\toffset: %d\n", op->idx.offset);
 
                if (op->idx.base_reg == M680X_REG_PC)
                    printf("\t\t\toffset address: 0x%x\n",
                        op->idx.offset_addr);
 
                printf("\t\t\toffset bits: %u\n",
                    op->idx.offset_bits);
            }
 
            if (op->idx.inc_dec) {
                const char *post_pre = op->idx.flags &
                    M680X_IDX_POST_INC_DEC ? "post" : "pre";
                const char *inc_dec = (op->idx.inc_dec > 0) ?
                    "increment" : "decrement";
 
                printf("\t\t\t%s %s: %d\n", post_pre, inc_dec,
                    abs(op->idx.inc_dec));
            }
 
            break;
        }
 
        if (op->size != 0)
            printf("\t\t\tsize: %u\n", op->size);
 
        if (op->access != CS_AC_INVALID)
            printf("\t\t\taccess: %s\n", s_access[op->access]);
    }
 
    print_read_write_regs(handle, detail);
}