/* Copies code from src to dest in a thread safe way, returns 1 on success,
* returns 0 on error. This will likely assert on error to avoid partially
* copied code or undefined state.
*/
static int NCCopyCode(uint8_t *dst, uint8_t *src, NaClPcAddress vbase,
size_t sz, NaClCopyInstructionFunc copy_func) {
NCDecoderState dst_dstate;
NCDecoderInst dst_inst;
NCDecoderState src_dstate;
NCDecoderInst src_inst;
NCDecoderStatePair pair;
int result = 0;
NCDecoderStateConstruct(&dst_dstate, dst, vbase, sz, &dst_inst, 1);
NCDecoderStateConstruct(&src_dstate, src, vbase, sz, &src_inst, 1);
NCDecoderStatePairConstruct(&pair, &dst_dstate, &src_dstate, copy_func);
pair.action_fn = CopyInstruction;
if (NCDecoderStatePairDecode(&pair)) result = 1;
NCDecoderStatePairDestruct(&pair);
NCDecoderStateDestruct(&src_dstate);
NCDecoderStateDestruct(&dst_dstate);
return result;
}
void NCDecodeSegment(uint8_t* mbase, NaClPcAddress vbase,
NaClMemorySize size) {
NCDecoderInst inst;
NCDecoderState dstate;
NCDecoderStateConstruct(&dstate, mbase, vbase, size, &inst, 1);
NCDecoderStateSetErrorReporter(&dstate, &kNCVerboseErrorReporter);
/* TODO(karl): Fix this so that we don't need to override the
* action function.
*/
dstate.action_fn = PrintInstLogGio;
NCDecoderStateDecode(&dstate);
NCDecoderStateDestruct(&dstate);
}
/* Create the decoder state for the validator state, using the
* given parameters.
*/
static void NCValidateDStateInit(NCValidatorState *vstate,
uint8_t *mbase, NaClPcAddress vbase,
NaClMemorySize sz) {
NCDecoderState* dstate = &vstate->dstate;
/* Note: Based on the current API, we must grab the error reporter
* and reinstall it, after the call to NCValidateDStateInit, so that
* we don't replace it with the default error reporter.
*/
NaClErrorReporter* reporter = dstate->error_reporter;
NCDecoderStateConstruct(dstate, mbase, vbase, sz,
vstate->inst_buffer, kNCValidatorInstBufferSize);
dstate->action_fn = ValidateInst;
dstate->new_segment_fn = (NCDecoderStateMethod) NCStatsNewSegment;
dstate->segmentation_error_fn = (NCDecoderStateMethod) NCStatsSegFault;
dstate->internal_error_fn = (NCDecoderStateMethod) NCStatsInternalError;
NCDecoderStateSetErrorReporter(dstate, reporter);
}
