asm_tricore.c

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// SPDX-FileCopyrightText: 2016 pancake <pancake@nopcode.org>
// SPDX-License-Identifier: LGPL-3.0-only
 
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
 
#include <rz_types.h>
#include <rz_lib.h>
#include <rz_util.h>
#include <rz_asm.h>
 
#include "disas-asm.h"
 
static unsigned long Offset = 0;
static RzStrBuf *buf_global = NULL;
static ut8 bytes[128];
enum {
    TRICORE_GENERIC = 0x00000000,
    TRICORE_RIDER_A = 0x00000001,
    TRICORE_RIDER_B = 0x00000002,
    TRICORE_RIDER_D = TRICORE_RIDER_B,
    TRICORE_V2 = 0x00000004,
    TRICORE_PCP = 0x00000010,
    TRICORE_PCP2 = 0x00000020
};
 
static int cpu_to_mach(char *cpu_type) {
    if (cpu_type && *cpu_type) {
        if (!strcmp(cpu_type, "generic")) {
            return TRICORE_GENERIC;
        }
        if (!strcmp(cpu_type, "rider-a")) {
            return TRICORE_RIDER_A;
        }
        if ((!strcmp(cpu_type, "rider-b")) || (!strcmp(cpu_type, "rider-d"))) {
            return TRICORE_RIDER_B;
        }
        if (!strcmp(cpu_type, "v2")) {
            return TRICORE_V2;
        }
        if (!strcmp(cpu_type, "pcp")) {
            return TRICORE_PCP;
        }
        if (!strcmp(cpu_type, "pcp2")) {
            return TRICORE_PCP2;
        }
    }
    return TRICORE_RIDER_B;
}
 
static int tricore_buffer_read_memory(bfd_vma memaddr, bfd_byte *myaddr, ut32 length, struct disassemble_info *info) {
    int delta = memaddr - Offset;
    if (delta >= 0 && length + delta < sizeof(bytes)) {
        memcpy(myaddr, bytes + delta, length);
    }
    return 0;
}
 
static int symbol_at_address(bfd_vma addr, struct disassemble_info *info) {
    return 0;
}
 
static void memory_error_func(int status, bfd_vma memaddr, struct disassemble_info *info) {
    //--
}
 
DECLARE_GENERIC_PRINT_ADDRESS_FUNC()
DECLARE_GENERIC_FPRINTF_FUNC()
 
static int disassemble(RzAsm *a, RzAsmOp *op, const ut8 *buf, int len) {
    struct disassemble_info disasm_obj;
    buf_global = &op->buf_asm;
    Offset = a->pc;
    memcpy(bytes, buf, RZ_MIN(len, 8)); // TODO handle thumb
 
    /* prepare disassembler */
    memset(&disasm_obj, '\0', sizeof(struct disassemble_info));
    disasm_obj.disassembler_options = (a->bits == 64) ? "64" : "";
    disasm_obj.buffer = bytes;
    disasm_obj.read_memory_func = &tricore_buffer_read_memory;
    disasm_obj.symbol_at_address_func = &symbol_at_address;
    disasm_obj.memory_error_func = &memory_error_func;
    disasm_obj.print_address_func = &generic_print_address_func;
    disasm_obj.endian = BFD_ENDIAN_LITTLE;
    disasm_obj.fprintf_func = &generic_fprintf_func;
    disasm_obj.stream = stdout;
 
    // cpu type
    disasm_obj.mach = cpu_to_mach(a->cpu);
 
    op->size = print_insn_tricore((bfd_vma)Offset, &disasm_obj);
    if (op->size == -1) {
        rz_asm_op_set_asm(op, " (data)");
    }
    return op->size;
}
 
RzAsmPlugin rz_asm_plugin_tricore = {
    .name = "tricore",
    .arch = "tricore",
    .license = "GPL3",
    .bits = 32,
    .endian = RZ_SYS_ENDIAN_LITTLE,
    .desc = "Siemens TriCore CPU",
    .disassemble = &disassemble,
};
 
#ifndef RZ_PLUGIN_INCORE
RZ_API RzLibStruct rizin_plugin = {
    .type = RZ_LIB_TYPE_ASM,
    .data = &rz_asm_plugin_tricore,
    .version = RZ_VERSION
};
#endif