reactos/rosapps/devutils/cputointel/From/ARM/ARMBrain.c

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#include <stdio.h>
#include <stdlib.h>
#include "ARMBrain.h"
#include "ARM.h"
#include "../../misc.h"
/*
* DummyBrain is example how you create you own cpu brain to translate from
* cpu to intel assembler, I have not add DummyBrain to the loader it is not
* need it in our example. When you write you own brain, it must be setup in
* misc.c function LoadPFileImage and PEFileStart, PEFileStart maybe does not
* need the brain you have writen so you do not need setup it there then.
*
* input param:
* cpu_buffer : the memory buffer with loaded program we whant translate
* cpu_pos : the positions in the cpu_buffer
* cpu_size : the alloced memory size of the cpu_buffer
* BaseAddress : the virtual memory address we setup to use.
* cpuarch : the sub arch for the brain, example if it exists more one
* cpu with same desgin but few other opcode or extend opcode
* outfp : the output file pointer
*
* mode : if we should run disambler of this binary or
* translate it, Disambler will not calc the
* the row name right so we simple give each
row a name. In translations mode we run a
* analys so we getting better optimzing and
* only row name there we need.
* value for mode are :
* 0 = disambler mode
* 1 = translate mode intel
*
* return value
* 0 : Ok
* 1 : unimplemt
* 2 : Unkonwn Opcode
* 3 : unimplement cpu
* 4 : unknown machine
*/
CPU_INT ARMBrain( CPU_BYTE *cpu_buffer,
CPU_UNINT cpu_pos,
CPU_UNINT cpu_size,
CPU_UNINT BaseAddress,
CPU_UNINT cpuarch,
FILE *outfp)
{
CPU_UNINT cpu_oldpos;
CPU_INT cpuint;
CPU_INT retcode = 0;
CPU_INT retsize;
/* now we start the process */
while (cpu_pos<cpu_size)
{
cpu_oldpos = cpu_pos;
cpuint = cpu_buffer[cpu_pos];
/* Add */
if ((cpuint - (cpuint & GetMaskByte32(cpuARMInit_))) == ConvertBitToByte32(cpuARMInit_))
{
retsize = ARM_( outfp, cpu_buffer, cpu_pos, cpu_size,
BaseAddress, cpuarch);
if (retsize<0)
retcode = 1;
else
cpu_pos += retsize;
}
/* Found all Opcode and breakout and return no error found */
if (cpu_pos >=cpu_size)
{
break;
}
/* Check if we have found a cpu opcode */
if (cpu_oldpos == cpu_pos)
{
if (retcode == 0)
{
/* no unimplement error where found so we return a msg for unknown opcode */
printf("Unkonwn Opcode found at 0x%8x opcode 0x%2x\n",cpu_oldpos+BaseAddress,(unsigned int)cpu_buffer[cpu_oldpos]);
retcode = 2;
}
}
/* Erorro Found ? */
if (retcode!=0)
{
/* Erorro Found break and return the error code */
break;
}
}
return retcode;
}