analysis_i8080.c

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// SPDX-FileCopyrightText: 2012 pancake <pancake@nopcode.org>
// SPDX-License-Identifier: LGPL-3.0-only
 
// This file is based on the Z80 analyser and modified for
// the Intel 8080 disassembler by Alexander Demin, 2012.
 
#include <string.h>
#include <rz_types.h>
#include <rz_lib.h>
#include <rz_asm.h>
#include <rz_analysis.h>
// hack
#include "../../asm/arch/i8080/i8080dis.c"
 
static int i8080_op(RzAnalysis *analysis, RzAnalysisOp *op, ut64 addr, const ut8 *data, int len, RzAnalysisOpMask mask) {
    char out[32];
    int ilen = i8080_disasm(data, out, len);
    op->addr = addr;
    op->type = RZ_ANALYSIS_OP_TYPE_UNK;
    switch (data[0]) {
    case 0x00:
        op->type = RZ_ANALYSIS_OP_TYPE_NOP;
        break;
    case 0x03:
    case 0x04:
    case 0x0c:
    case 0x13:
    case 0x14:
    case 0x1c:
    case 0x23:
    case 0x24:
    case 0x2c:
    case 0x33:
    case 0x34:
    case 0x3c:
        op->type = RZ_ANALYSIS_OP_TYPE_ADD; // INC
        break;
    case 0x09:
    case 0x19:
    case 0x29:
    case 0x39:
    case 0x80:
    case 0x81:
    case 0x82:
    case 0x83:
    case 0x84:
    case 0x85:
    case 0x86:
    case 0x87:
    case 0xc6:
        op->type = RZ_ANALYSIS_OP_TYPE_ADD;
        break;
    case 0x90:
    case 0x91:
    case 0x92:
    case 0x93:
    case 0x94:
    case 0x95:
    case 0x96:
    case 0x97:
    case 0xd6:
        op->type = RZ_ANALYSIS_OP_TYPE_SUB;
        break;
    case 0xc0:
    case 0xc8:
    case 0xd0:
    case 0xd8:
    case 0xe0:
    case 0xe8:
    case 0xf0:
    case 0xf8:
        op->type = RZ_ANALYSIS_OP_TYPE_CRET;
        break;
    case 0xc9:
        op->type = RZ_ANALYSIS_OP_TYPE_RET;
        break;
    case 0x05:
    case 0x0b:
    case 0x0d:
    case 0x15:
    case 0x1b:
    case 0x1d:
    case 0x25:
    case 0x2b:
    case 0x2d:
    case 0x35:
    case 0x3b:
    case 0x3d:
        // XXXX: DEC
        op->type = RZ_ANALYSIS_OP_TYPE_SUB;
        break;
    case 0xc5:
    case 0xd5:
    case 0xe5:
    case 0xf5:
        op->type = RZ_ANALYSIS_OP_TYPE_PUSH;
        break;
    case 0xc1:
    case 0xd1:
    case 0xe1:
    case 0xf1:
        op->type = RZ_ANALYSIS_OP_TYPE_POP;
        break;
    case 0x40:
    case 0x49:
    case 0x52:
    case 0x5b:
    case 0x64:
    case 0x6d:
    case 0x76:
    case 0x7f:
        op->type = RZ_ANALYSIS_OP_TYPE_TRAP; // HALT
        break;
    case 0x10:
    case 0x18:
    case 0x20:
    case 0x28:
    case 0x30:
    case 0x38:
    case 0xc2:
    case 0xc3:
    case 0xca:
    case 0xd2:
    case 0xda:
    case 0xe2:
    case 0xe9:
    case 0xea:
    case 0xf2:
    case 0xfa:
        op->type = RZ_ANALYSIS_OP_TYPE_JMP; // jmpz
        break;
 
    case 0xc4:
    case 0xcc:
    case 0xcd:
    case 0xd4:
    case 0xdc:
    case 0xdd:
    case 0xe4:
    case 0xec:
    case 0xed:
    case 0xf4:
    case 0xfc:
    case 0xfd:
        op->type = RZ_ANALYSIS_OP_TYPE_CALL;
        break;
    case 0xc7: // rst 0
        op->jump = 0x00;
        op->fail = addr + ilen;
        op->type = RZ_ANALYSIS_OP_TYPE_JMP;
        break;
    case 0xcf: // rst 8
        op->jump = 0x08;
        op->fail = addr + ilen;
        op->type = RZ_ANALYSIS_OP_TYPE_JMP;
        break;
    case 0xd7: // rst 16
        op->jump = 0x10;
        op->fail = addr + ilen;
        op->type = RZ_ANALYSIS_OP_TYPE_JMP;
        break;
    case 0xdf: // rst 24
        op->jump = 0x18;
        op->fail = addr + ilen;
        op->type = RZ_ANALYSIS_OP_TYPE_JMP;
        break;
    case 0xe7: // rst 32
        op->jump = 0x20;
        op->fail = addr + ilen;
        op->type = RZ_ANALYSIS_OP_TYPE_JMP;
        break;
    case 0xef: // rst 40
        op->jump = 0x28;
        op->fail = addr + ilen;
        op->type = RZ_ANALYSIS_OP_TYPE_JMP;
        break;
    case 0xf7: // rst 48
        op->jump = 0x30;
        op->fail = addr + ilen;
        op->type = RZ_ANALYSIS_OP_TYPE_JMP;
        break;
    case 0xff: // rst 56
        op->jump = 0x38;
        op->fail = addr + ilen;
        op->type = RZ_ANALYSIS_OP_TYPE_JMP;
        break; // copypasta from gb and z80
    }
    return op->size = ilen;
}
 
RzAnalysisPlugin rz_analysis_plugin_i8080 = {
    .name = "i8080",
    .desc = "I8080 CPU code analysis plugin",
    .license = "LGPL3",
    .arch = "i8080",
    .bits = 16,
    .op = &i8080_op,
};
 
#ifndef RZ_PLUGIN_INCORE
RZ_API RzLibStruct rizin_plugin = {
    .type = RZ_LIB_TYPE_ANALYSIS,
    .data = &rz_analysis_plugin_i8080,
    .version = RZ_VERSION
};
#endif