int darm_str2(const darm_t *d, darm_str_t *str, int lowercase)
{
if(darm_str(d, str) < 0) {
return -1;
}
if(lowercase != 0) {
// just lowercase the entire object, including null-bytes
char *buf = (char *) str;
for (uint32_t i = 0; i < sizeof(darm_str_t); i++) {
buf[i] = tolower(buf[i]);
}
}
return 0;
}
/**
* Instruction Begin callback.
*/
void nd_instruction_begin_callback(DECAF_Callback_Params* params){
DEFENSIVE_CHECK0(params == NULL);
DEFENSIVE_CHECK0(getCurrentPID() != ND_GLOBAL_TRACING_PID);
CPUState* env = params->ib.env;
gva_t cur_pc = params->ib.cur_pc;
//since for thumb instruction, the last bit is '1'
gva_t cur_pc_even = cur_pc & 0xfffffffe;
//ARM Instruction
union _tmpARMInsn{
target_ulong insn;
char chars[4];
} tmpARMInsn;
//Thumb Instruction
union _tmpThumbInsn{
unsigned short insn;
char chars[2];
} tmpThumbInsn;
//Thumb2 Instruction
union _tmpThumb2Insn{
target_ulong insn;
char chars[4];
} tmpThumb2Insn;
//undefined instruction
if(cur_pc == -1){
return;
}
//the first instruction of target native method
SourcePolicy* sourcePolicy = findSourcePolicy(cur_pc_even);
if(sourcePolicy != NULL){
sourcePolicy->handler(sourcePolicy, env);
}
//Thumb instruction
if(env->thumb == 1){
if(DECAF_read_mem(env, cur_pc_even, tmpThumbInsn.chars, 2) != -1){
darm_t d;
darm_str_t str;
// magic table constructed based on section A6.1 of the ARM manual
static uint8_t is_thumb2[0x20] = {
[0x01d] = 1,
[0x01e] = 1,
[0x01f] = 1,
};
if(is_thumb2[tmpThumbInsn.insn >> 11]){
//Thumb2 instruction
if(DECAF_read_mem(env, cur_pc_even, tmpThumb2Insn.chars, 4) != -1){
if(darm_thumb2_disasm(&d, tmpThumb2Insn.insn >> 16, tmpThumb2Insn.insn & 0x0000ffff) == 0){
if(darm_str(&d, &str) == 0){
//DECAF_printf("T2 %x: %s\n", cur_pc, str.total);
}
}
}
}else{
//Thumb instruction
if(darm_thumb_disasm(&d, tmpThumbInsn.insn) == 0){
if(darm_str(&d, &str) == 0){
//DECAF_printf("T %x: %s\n", cur_pc, str.total);
}
}
}
}