Asm/src/arch/yasep.c

127 lines
3.0 KiB
C

/* $Id$ */
/* Copyright (c) 2011 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Devel asm */
/* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <stddef.h>
#include "Asm.h"
/* yasep */
/* private */
/* variables */
/* plug-in */
#define REG(name, size, id) { "" # name, size, id },
static ArchRegister _yasep_registers[] =
{
#include "yasep.reg"
{ NULL, 0, 0 }
};
#undef REG
static ArchInstruction _yasep_instructions[] =
{
#include "yasep.ins"
#include "common.ins"
#include "null.ins"
};
/* prototypes */
/* plug-in */
static int _yasep_encode(ArchPlugin * plugin, ArchInstruction * instruction,
ArchInstructionCall * call);
static int _yasep_decode(ArchPlugin * plugin, ArchInstructionCall * call);
/* protected */
/* variables */
ArchPlugin arch_plugin =
{
NULL,
"yasep",
NULL,
_yasep_registers,
_yasep_instructions,
NULL,
NULL,
_yasep_encode,
_yasep_decode
};
/* private */
/* functions */
/* plug-in */
/* yasep_encode */
static int _encode_16(ArchPlugin * plugin, ArchInstruction * instruction,
ArchInstructionCall * call);
static int _encode_32(ArchPlugin * plugin, ArchInstruction * instruction,
ArchInstructionCall * call);
static int _yasep_encode(ArchPlugin * plugin, ArchInstruction * instruction,
ArchInstructionCall * call)
{
return (instruction->opcode & 0x1)
? _encode_32(plugin, instruction, call)
: _encode_16(plugin, instruction, call);
}
static int _encode_16(ArchPlugin * plugin, ArchInstruction * instruction,
ArchInstructionCall * call)
{
ArchPluginHelper * helper = plugin->helper;
uint16_t opcode = instruction->opcode;
opcode = _htob16(opcode);
if(helper->write(helper->arch, &opcode, sizeof(opcode))
!= sizeof(opcode))
return -1;
return 0;
}
static int _encode_32(ArchPlugin * plugin, ArchInstruction * instruction,
ArchInstructionCall * call)
{
ArchPluginHelper * helper = plugin->helper;
uint32_t opcode = instruction->opcode;
opcode = _htob32(opcode);
if(helper->write(helper->arch, &opcode, sizeof(opcode))
!= sizeof(opcode))
return -1;
return 0;
}
/* yasep_decode */
static int _yasep_decode(ArchPlugin * plugin, ArchInstructionCall * call)
{
ArchPluginHelper * helper = plugin->helper;
uint16_t u16;
uint16_t opcode;
ArchInstruction * ai;
if(helper->read(helper->arch, &u16, sizeof(u16)) != sizeof(u16))
return -1;
u16 = _htob16(u16);
opcode = u16 & 0x00ff;
if((ai = helper->get_instruction_by_opcode(helper->arch, 16, opcode))
== NULL)
return -1;
call->name = ai->name;
return 0;
}