M680XInstPrinter.c

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/* Capstone Disassembly Engine */
/* M680X Backend by Wolfgang Schwotzer <wolfgang.schwotzer@gmx.net> 2017 */
 
#ifdef CAPSTONE_HAS_M680X
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <capstone/platform.h>
 
#include "../../MCInst.h"
#include "../../SStream.h"
#include "../../MCRegisterInfo.h"
#include "../../utils.h"
#include "M680XInstPrinter.h"
#include "M680XDisassembler.h"
#include "M680XDisassemblerInternals.h"
 
#ifndef CAPSTONE_DIET
static const char s_reg_names[][10] = {
        "<invalid>", "a", "b", "e", "f", "0", "d", "w", "cc", "dp", "md",
        "hx", "h", "x", "y", "s", "u", "v", "q", "pc", "tmp2", "tmp3",
};
 
static const char s_instruction_names[][6] = {
        "invld", "aba", "abx", "aby", "adc", "adca", "adcb", "adcd", "adcr",
        "add", "adda", "addb", "addd", "adde", "addf", "addr", "addw",
        "aim", "ais", "aix", "and", "anda", "andb", "andcc", "andd", "andr",
        "asl", "asla", "aslb", "asld",
        "asr", "asra", "asrb", "asrd", "asrx",
        "band",
        "bcc", "bclr", "bcs", "beor", "beq", "bge", "bgnd", "bgt", "bhcc",
        "bhcs", "bhi",
        "biand", "bieor", "bih", "bil",
        "bior", "bit", "bita", "bitb", "bitd", "bitmd", "ble", "bls", "blt",
        "bmc",
        "bmi", "bms",
        "bne", "bor", "bpl", "brclr", "brset", "bra", "brn", "bset", "bsr",
        "bvc", "bvs",
        "call", "cba", "cbeq", "cbeqa", "cbeqx", "clc", "cli",
        "clr", "clra", "clrb", "clrd", "clre", "clrf", "clrh", "clrw", "clrx",
        "clv", "cmp",
        "cmpa", "cmpb", "cmpd", "cmpe", "cmpf", "cmpr", "cmps", "cmpu", "cmpw",
        "cmpx", "cmpy",
        "com", "coma", "comb", "comd", "come", "comf", "comw", "comx", "cpd",
        "cphx", "cps", "cpx", "cpy",
        "cwai", "daa", "dbeq", "dbne", "dbnz", "dbnza", "dbnzx",
        "dec", "deca", "decb", "decd", "dece", "decf", "decw",
        "decx", "des", "dex", "dey",
        "div", "divd", "divq", "ediv", "edivs", "eim", "emacs", "emaxd",
        "emaxm", "emind", "eminm", "emul", "emuls",
        "eor", "eora", "eorb", "eord", "eorr", "etbl",
        "exg", "fdiv", "ibeq", "ibne", "idiv", "idivs", "illgl",
        "inc", "inca", "incb", "incd", "ince", "incf", "incw", "incx",
        "ins", "inx", "iny",
        "jmp", "jsr",
        "lbcc", "lbcs", "lbeq", "lbge", "lbgt", "lbhi", "lble", "lbls", "lblt",
        "lbmi", "lbne", "lbpl", "lbra", "lbrn", "lbsr", "lbvc", "lbvs",
        "lda", "ldaa", "ldab", "ldb", "ldbt", "ldd", "lde", "ldf", "ldhx",
        "ldmd",
        "ldq", "lds", "ldu", "ldw", "ldx", "ldy",
        "leas", "leau", "leax", "leay",
        "lsl", "lsla", "lslb", "lsld", "lslx",
        "lsr", "lsra", "lsrb", "lsrd", "lsrw", "lsrx",
        "maxa", "maxm", "mem", "mina", "minm", "mov", "movb", "movw", "mul",
        "muld",
        "neg", "nega", "negb", "negd", "negx",
        "nop", "nsa", "oim", "ora", "oraa", "orab", "orb", "orcc", "ord", "orr",
        "psha", "pshb", "pshc", "pshd", "pshh", "pshs", "pshsw", "pshu",
        "pshuw", "pshx", "pshy",
        "pula", "pulb", "pulc", "puld", "pulh", "puls", "pulsw", "pulu",
        "puluw", "pulx", "puly", "rev", "revw",
        "rol", "rola", "rolb", "rold", "rolw", "rolx",
        "ror", "rora", "rorb", "rord", "rorw", "rorx",
        "rsp", "rtc", "rti", "rts", "sba", "sbc", "sbca", "sbcb", "sbcd",
        "sbcr",
        "sec", "sei", "sev", "sex", "sexw", "slp", "sta", "staa", "stab", "stb",
        "stbt", "std", "ste", "stf", "stop", "sthx",
        "stq", "sts", "stu", "stw", "stx", "sty",
        "sub", "suba", "subb", "subd", "sube", "subf", "subr", "subw",
        "swi", "swi2", "swi3",
        "sync", "tab", "tap", "tax", "tba", "tbeq", "tbl", "tbne", "test",
        "tfm", "tfr",
        "tim", "tpa",
        "tst", "tsta", "tstb", "tstd", "tste", "tstf", "tstw", "tstx",
        "tsx", "tsy", "txa", "txs", "tys", "wai", "wait", "wav", "wavr",
        "xgdx", "xgdy",
};
 
static name_map s_group_names[] = {
        { M680X_GRP_INVALID, "<invalid>" },
        { M680X_GRP_JUMP,  "jump" },
        { M680X_GRP_CALL,  "call" },
        { M680X_GRP_RET, "return" },
        { M680X_GRP_INT, "interrupt" },
        { M680X_GRP_IRET,  "interrupt_return" },
        { M680X_GRP_PRIV,  "privileged" },
        { M680X_GRP_BRAREL,  "branch_relative" },
};
#endif
 
static void printRegName(cs_struct *handle, SStream *OS, unsigned int reg)
{
#ifndef CAPSTONE_DIET
        SStream_concat(OS, handle->reg_name((csh)handle, reg));
#endif
}
 
static void printInstructionName(cs_struct *handle, SStream *OS,
        unsigned int insn)
{
#ifndef CAPSTONE_DIET
        SStream_concat(OS, handle->insn_name((csh)handle, insn));
#endif
}
 
static uint32_t get_unsigned(int32_t value, int byte_size)
{
        switch (byte_size) {
        case 1:
                return (uint32_t)(value & 0xff);
 
        case 2:
                return (uint32_t)(value & 0xffff);
 
        default:
        case 4:
                return (uint32_t)value;
        }
}
 
static void printIncDec(bool isPost, SStream *O, m680x_info *info,
        cs_m680x_op *op)
{
        static const char s_inc_dec[][3] = { "--", "-", "", "+", "++" };
 
        if (!op->idx.inc_dec)
                return;
 
        if ((!isPost && !(op->idx.flags & M680X_IDX_POST_INC_DEC)) ||
                (isPost && (op->idx.flags & M680X_IDX_POST_INC_DEC))) {
                const char *prePostfix = "";
 
                if (info->cpu_type == M680X_CPU_TYPE_CPU12)
                        prePostfix = (op->idx.inc_dec < 0) ? "-" : "+";
                else if (op->idx.inc_dec >= -2 && (op->idx.inc_dec <= 2)) {
                        prePostfix = (char *)s_inc_dec[op->idx.inc_dec + 2];
                }
 
                SStream_concat(O, prePostfix);
        }
}
 
static void printOperand(MCInst *MI, SStream *O, m680x_info *info,
        cs_m680x_op *op)
{
        switch (op->type) {
        case M680X_OP_REGISTER:
                printRegName(MI->csh, O, op->reg);
                break;
 
        case M680X_OP_CONSTANT:
                SStream_concat(O, "%u", op->const_val);
                break;
 
        case M680X_OP_IMMEDIATE:
                if (MI->csh->imm_unsigned)
                        SStream_concat(O, "#%u",
                                get_unsigned(op->imm, op->size));
                else
                        SStream_concat(O, "#%d", op->imm);
 
                break;
 
        case M680X_OP_INDEXED:
                if (op->idx.flags & M680X_IDX_INDIRECT)
                        SStream_concat(O, "[");
 
                if (op->idx.offset_reg != M680X_REG_INVALID)
                        printRegName(MI->csh, O, op->idx.offset_reg);
                else if (op->idx.offset_bits > 0) {
                        if (op->idx.base_reg == M680X_REG_PC)
                                SStream_concat(O, "$%04X", op->idx.offset_addr);
                        else
                                SStream_concat(O, "%d", op->idx.offset);
                }
                else if (op->idx.inc_dec != 0 &&
                        info->cpu_type == M680X_CPU_TYPE_CPU12)
                        SStream_concat(O, "%d", abs(op->idx.inc_dec));
 
                if (!(op->idx.flags & M680X_IDX_NO_COMMA))
                        SStream_concat(O, ",");
 
                printIncDec(false, O, info, op);
 
                printRegName(MI->csh, O, op->idx.base_reg);
 
                if (op->idx.base_reg == M680X_REG_PC &&
                        (op->idx.offset_bits > 0))
                        SStream_concat(O, "R");
 
                printIncDec(true, O, info, op);
 
                if (op->idx.flags & M680X_IDX_INDIRECT)
                        SStream_concat(O, "]");
 
                break;
 
        case M680X_OP_RELATIVE:
                SStream_concat(O, "$%04X", op->rel.address);
                break;
 
        case M680X_OP_DIRECT:
                SStream_concat(O, "$%02X", op->direct_addr);
                break;
 
        case M680X_OP_EXTENDED:
                if (op->ext.indirect)
                        SStream_concat(O, "[$%04X]", op->ext.address);
                else {
                        if (op->ext.address < 256) {
                                SStream_concat(O, ">$%04X", op->ext.address);
                        }
                        else {
                                SStream_concat(O, "$%04X", op->ext.address);
                        }
                }
 
                break;
 
        default:
                SStream_concat(O, "<invalid_operand>");
                break;
        }
}
 
static const char *getDelimiter(m680x_info *info, cs_m680x *m680x)
{
        bool indexed = false;
        int count = 0;
        int i;
 
        if (info->insn == M680X_INS_TFM)
                return ",";
 
        if (m680x->op_count > 1) {
                for (i  = 0; i < m680x->op_count; ++i) {
                        if (m680x->operands[i].type == M680X_OP_INDEXED)
                                indexed = true;
 
                        if (m680x->operands[i].type != M680X_OP_REGISTER)
                                count++;
                }
        }
 
        return (indexed && (count >= 1)) ? ";" : ",";
};
 
void M680X_printInst(MCInst *MI, SStream *O, void *PrinterInfo)
{
        m680x_info *info = (m680x_info *)PrinterInfo;
        cs_m680x *m680x = &info->m680x;
        cs_detail *detail = MI->flat_insn->detail;
        int suppress_operands = 0;
        const char *delimiter = getDelimiter(info, m680x);
        int i;
 
        if (detail != NULL)
                memcpy(&detail->m680x, m680x, sizeof(cs_m680x));
 
        if (info->insn == M680X_INS_INVLD || info->insn == M680X_INS_ILLGL) {
                if (m680x->op_count)
                        SStream_concat(O, "fcb $%02X", m680x->operands[0].imm);
                else
                        SStream_concat(O, "fcb $<unknown>");
 
                return;
        }
 
        printInstructionName(MI->csh, O, info->insn);
        SStream_concat(O, " ");
 
        if ((m680x->flags & M680X_FIRST_OP_IN_MNEM) != 0)
                suppress_operands++;
 
        if ((m680x->flags & M680X_SECOND_OP_IN_MNEM) != 0)
                suppress_operands++;
 
        for (i  = 0; i < m680x->op_count; ++i) {
                if (i >= suppress_operands) {
                        printOperand(MI, O, info, &m680x->operands[i]);
 
                        if ((i + 1) != m680x->op_count)
                                SStream_concat(O, delimiter);
                }
        }
}
 
const char *M680X_reg_name(csh handle, unsigned int reg)
{
#ifndef CAPSTONE_DIET
 
        if (reg >= ARR_SIZE(s_reg_names))
                return NULL;
 
        return s_reg_names[(int)reg];
#else
        return NULL;
#endif
}
 
const char *M680X_insn_name(csh handle, unsigned int id)
{
#ifndef CAPSTONE_DIET
 
        if (id >= ARR_SIZE(s_instruction_names))
                return NULL;
        else
                return s_instruction_names[(int)id];
 
#else
        return NULL;
#endif
}
 
const char *M680X_group_name(csh handle, unsigned int id)
{
#ifndef CAPSTONE_DIET
        return id2name(s_group_names, ARR_SIZE(s_group_names), id);
#else
        return NULL;
#endif
}
 
cs_err M680X_instprinter_init(cs_struct *ud)
{
#ifndef CAPSTONE_DIET
 
        if (M680X_REG_ENDING != ARR_SIZE(s_reg_names)) {
                fprintf(stderr, "Internal error: Size mismatch in enum "
                        "m680x_reg and s_reg_names\n");
 
                return CS_ERR_MODE;
        }
 
        if (M680X_INS_ENDING != ARR_SIZE(s_instruction_names)) {
                fprintf(stderr, "Internal error: Size mismatch in enum "
                        "m680x_insn and s_instruction_names\n");
 
                return CS_ERR_MODE;
        }
 
        if (M680X_GRP_ENDING != ARR_SIZE(s_group_names)) {
                fprintf(stderr, "Internal error: Size mismatch in enum "
                        "m680x_group_type and s_group_names\n");
 
                return CS_ERR_MODE;
        }
 
#endif
 
        return CS_ERR_OK;
}
 
#endif