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emu_script.cpp
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emu_script.cpp
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/*
Scripting support for the MSP430 emulator IdaPro plugin
Copyright (c) 2014 Chris Eagle
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; either version 2 of the License, or (at your option)
any later version.
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, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <ida.hpp>
#include <expr.hpp>
#include "cpu.h"
#include "emu_script.h"
#include "sdk_versions.h"
#if IDA_SDK_VERSION < 520
typedef value_t idc_value_t;
#endif
#if IDA_SDK_VERSION >= 700
bool set_idc_func_ex(const char *name, idc_func_t *fp, const char *args, int extfunc_flags) {
ext_idcfunc_t func;
func.name = name;
func.fptr = fp;
func.args = args;
func.defvals = NULL;
func.ndefvals = 0;
func.flags = extfunc_flags;
return add_idc_func(func);
}
#endif
/*
* prototypes for functions in x86emu.cpp that we use
* to implement some of the scripted behavior
*/
void run();
void trace();
void stepOne();
void traceOne();
void emuSyncDisplay();
void setIdcRegister(unsigned int idc_reg_num, unsigned int newVal);
void addBreakpoint(unsigned int addr);
/*
* native implementation of EmuRun.
*/
static error_t idaapi idc_emu_run(idc_value_t * /*argv*/, idc_value_t * /*res*/) {
run();
return eOk;
}
/*
* native implementation of EmuStepOne.
*/
static error_t idaapi idc_emu_step(idc_value_t * /*argv*/, idc_value_t * /*res*/) {
stepOne();
return eOk;
}
/*
* native implementation of EmuTraceOne.
*/
static error_t idaapi idc_emu_trace_one(idc_value_t * /*argv*/, idc_value_t * /*res*/) {
traceOne();
return eOk;
}
/*
* native implementation of EmuTrace.
*/
static error_t idaapi idc_emu_trace(idc_value_t * /*argv*/, idc_value_t * /*res*/) {
trace();
return eOk;
}
/*
* native implementation of EmuSync.
*/
static error_t idaapi idc_emu_sync(idc_value_t * /*argv*/, idc_value_t * /*res*/) {
emuSyncDisplay();
return eOk;
}
/*
* native implementation of EmuGetReg. Converts a register constant
* into the appropriate offset into the cpu struct and returns the
* value of the indicated register. Returns -1 if an invalid register
* number is specified.
*/
static error_t idaapi idc_emu_getreg(idc_value_t *argv, idc_value_t *res) {
res->vtype = VT_LONG;
if (argv[0].vtype == VT_LONG) {
unsigned int regnum = (unsigned int)argv[0].num;
switch (regnum) {
case PC_REG: case SP_REG: case SR_REG: case CG_REG:
case R4_REG: case R5_REG: case R6_REG: case R7_REG:
case R8_REG: case R9_REG: case R10_REG: case R11_REG:
case R12_REG: case R13_REG: case R14_REG: case R15_REG:
res->num = cpu.general[regnum - PC_REG];
break;
default:
res->num = -1;
break;
}
}
else {
res->num = -1;
}
return eOk;
}
/*
* native implementation of EmuSetReg. Converts a register constant
* into the appropriate offset into the cpu struct and sets the
* value of the indicated register. Returns 0 on success and -1 if an
* invalid register number is specified.
*/
static error_t idaapi idc_emu_setreg(idc_value_t *argv, idc_value_t *res) {
res->vtype = VT_LONG;
res->num = 0;
if (argv[0].vtype == VT_LONG && argv[1].vtype == VT_LONG) {
unsigned int regnum = (unsigned int)argv[0].num;
unsigned int regval = (unsigned int)argv[1].num;
switch (regnum) {
case PC_REG: case SP_REG: case SR_REG: case CG_REG:
case R4_REG: case R5_REG: case R6_REG: case R7_REG:
case R8_REG: case R9_REG: case R10_REG: case R11_REG:
case R12_REG: case R13_REG: case R14_REG: case R15_REG:
//these registers are all displayed so we need to update the
//respective control as well as set the register
setIdcRegister(regnum, regval);
break;
default:
res->num = -1;
break;
}
}
else {
res->num = -1;
}
return eOk;
}
/*
* native implementation of EmuAddBpt. Adds an emulator breakpoint
* at the specified address.
*/
static error_t idaapi idc_emu_addbpt(idc_value_t *argv, idc_value_t *res) {
res->vtype = VT_LONG;
if (argv[0].vtype == VT_LONG) {
unsigned int addr = (unsigned int)argv[0].num;
addBreakpoint(addr);
res->num = 1;
}
else {
res->num = 0;
}
return eOk;
}
/*
* Register new IDC functions for use with the emulator
*/
void register_funcs() {
static const char idc_void[] = { 0 };
// static const char idc_str_args[] = { VT_STR, 0 };
static const char idc_long[] = { VT_LONG, 0 };
static const char idc_long_long[] = { VT_LONG, VT_LONG, 0 };
#if IDA_SDK_VERSION < 570
set_idc_func("EmuRun", idc_emu_run, idc_void);
set_idc_func("EmuTrace", idc_emu_trace, idc_void);
set_idc_func("EmuStepOne", idc_emu_step, idc_void);
set_idc_func("EmuTraceOne", idc_emu_trace_one, idc_void);
set_idc_func("EmuSync", idc_emu_sync, idc_void);
set_idc_func("EmuGetReg", idc_emu_getreg, idc_long);
set_idc_func("EmuSetReg", idc_emu_setreg, idc_long_long);
set_idc_func("EmuAddBpt", idc_emu_addbpt, idc_long);
#else
set_idc_func_ex("EmuRun", idc_emu_run, idc_void, EXTFUN_BASE);
set_idc_func_ex("EmuTrace", idc_emu_trace, idc_void, EXTFUN_BASE);
set_idc_func_ex("EmuStepOne", idc_emu_step, idc_void, EXTFUN_BASE);
set_idc_func_ex("EmuTraceOne", idc_emu_trace_one, idc_void, EXTFUN_BASE);
set_idc_func_ex("EmuSync", idc_emu_sync, idc_void, EXTFUN_BASE);
set_idc_func_ex("EmuGetReg", idc_emu_getreg, idc_long, EXTFUN_BASE);
set_idc_func_ex("EmuSetReg", idc_emu_setreg, idc_long_long, EXTFUN_BASE);
set_idc_func_ex("EmuAddBpt", idc_emu_addbpt, idc_long, EXTFUN_BASE);
#endif
}
/*
* Unregister IDC functions when the plugin is unloaded
*/
void unregister_funcs() {
#if IDA_SDK_VERSION < 570
set_idc_func("EmuRun", NULL, NULL);
set_idc_func("EmuTrace", NULL, NULL);
set_idc_func("EmuStepOne", NULL, NULL);
set_idc_func("EmuTraceOne", NULL, NULL);
set_idc_func("EmuSync", NULL, NULL);
set_idc_func("EmuGetReg", NULL, NULL);
set_idc_func("EmuSetReg", NULL, NULL);
set_idc_func("EmuAddBpt", NULL, NULL);
#else
set_idc_func_ex("EmuRun", NULL, NULL, 0);
set_idc_func_ex("EmuTrace", NULL, NULL, 0);
set_idc_func_ex("EmuStepOne", NULL, NULL, 0);
set_idc_func_ex("EmuTraceOne", NULL, NULL, 0);
set_idc_func_ex("EmuSync", NULL, NULL, 0);
set_idc_func_ex("EmuGetReg", NULL, NULL, 0);
set_idc_func_ex("EmuSetReg", NULL, NULL, 0);
set_idc_func_ex("EmuAddBpt", NULL, NULL, 0);
#endif
}