asm_xtensa.c File Reference

#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"

Go to the source code of this file.

Macros
#define	INSN_BUFFER_SIZE   4

Functions
static int	xtensa_buffer_read_memory (bfd_vma memaddr, bfd_byte *myaddr, ut32 length, struct disassemble_info *info)
static int	symbol_at_address (bfd_vma addr, struct disassemble_info *info)
static void	memory_error_func (int status, bfd_vma memaddr, struct disassemble_info *info)
static int	disassemble (RzAsm *a, RzAsmOp *op, const ut8 *buf, int len)

Variables
static ut64	offset = 0
static RzStrBuf *	buf_global = NULL
static ut8	bytes [INSN_BUFFER_SIZE]
RzAsmPlugin	rz_asm_plugin_xtensa
RZ_API RzLibStruct	rizin_plugin

Macro Definition Documentation

INSN_BUFFER_SIZE

#define INSN_BUFFER_SIZE   4

Definition at line 15 of file asm_xtensa.c.

Function Documentation

disassemble()

static int disassemble ( RzAsm *  a, RzAsmOp *  op, const ut8 *  buf, int  len  )

static

Definition at line 40 of file asm_xtensa.c.

                                                                       {
    struct disassemble_info disasm_obj;
    buf_global = &op->buf_asm;
    offset = a->pc;
    if (len > INSN_BUFFER_SIZE) {
        len = INSN_BUFFER_SIZE;
    }
    memcpy(bytes, buf, len); // 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.buffer_length = len;
    disasm_obj.read_memory_func = &xtensa_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 = !a->big_endian;
    disasm_obj.fprintf_func = &generic_fprintf_func;
    disasm_obj.stream = stdout;
 
    op->size = print_insn_xtensa((bfd_vma)offset, &disasm_obj);
    if (op->size == -1) {
        rz_asm_op_set_asm(op, "(data)");
    }
    return op->size;
}

References a, buf_global, disassemble_info::buffer, disassemble_info::buffer_length, bytes, disassemble_info::disassembler_options, disassemble_info::endian, disassemble_info::fprintf_func, INSN_BUFFER_SIZE, len, memcpy(), memory_error_func(), disassemble_info::memory_error_func, memset(), disassemble_info::print_address_func, print_insn_xtensa(), disassemble_info::read_memory_func, rz_asm_op_set_asm(), disassemble_info::stream, symbol_at_address(), disassemble_info::symbol_at_address_func, and xtensa_buffer_read_memory().

memory_error_func()

static void memory_error_func ( int  status, bfd_vma  memaddr, struct disassemble_info *  info  )

static

Definition at line 33 of file asm_xtensa.c.

                                                                                          {
    //--
}

Referenced by disassemble().

symbol_at_address()

static int symbol_at_address ( bfd_vma  addr, struct disassemble_info *  info  )

static

Definition at line 29 of file asm_xtensa.c.

                                                                          {
    return 0;
}

Referenced by disassemble().

xtensa_buffer_read_memory()

static int xtensa_buffer_read_memory ( bfd_vma  memaddr, bfd_byte *  myaddr, ut32  length, struct disassemble_info *  info  )

static

Definition at line 21 of file asm_xtensa.c.

                                                                                                                    {
    if (length > INSN_BUFFER_SIZE) {
        length = INSN_BUFFER_SIZE;
    }
    memcpy(myaddr, bytes, length);
    return 0;
}

References bytes, INSN_BUFFER_SIZE, length, and memcpy().

Referenced by disassemble().

Variable Documentation

buf_global

RzStrBuf* buf_global = NULL

static

Definition at line 18 of file asm_xtensa.c.

Referenced by disassemble().

bytes

ut8 bytes[INSN_BUFFER_SIZE]

static

Definition at line 19 of file asm_xtensa.c.

Referenced by disassemble(), and xtensa_buffer_read_memory().

offset

ut64 offset = 0

static

Definition at line 17 of file asm_xtensa.c.

rizin_plugin

RZ_API RzLibStruct rizin_plugin

Initial value:

= {
    .type = RZ_LIB_TYPE_ASM,
    .data = &rz_asm_plugin_xtensa,
    .version = RZ_VERSION
}

Definition at line 80 of file asm_xtensa.c.

rz_asm_plugin_xtensa

RzAsmPlugin rz_asm_plugin_xtensa

Initial value:

= {
    .name = "xtensa",
    .arch = "xtensa",
    .license = "GPL3",
    .bits = 32,
    .endian = RZ_SYS_ENDIAN_LITTLE | RZ_SYS_ENDIAN_BIG,
    .desc = "XTensa CPU",
    .disassemble = &disassemble
}

Definition at line 69 of file asm_xtensa.c.