Delete old x86 validator.

src/trusted/validator/x86/32/ncvalidate.c

-/*
- * Copyright (c) 2012 The Native Client Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/* Implement the ApplyValidator API for the x86-32 architecture. */
-
-#include "native_client/src/trusted/validator/ncvalidate.h"
-#include "native_client/src/trusted/validator/validation_cache.h"
-#include "native_client/src/trusted/validator/x86/ncval_seg_sfi/ncvalidate.h"
-#include "native_client/src/trusted/validator/x86/ncval_seg_sfi/ncvalidate_detailed.h"
-/* HACK to get access to didstubout */
-#include "native_client/src/trusted/validator/x86/ncval_seg_sfi/ncvalidate_internaltypes.h"
-#include <assert.h>
-
-/* Be sure the correct compile flags are defined for this. */
-#if NACL_ARCH(NACL_TARGET_ARCH) != NACL_x86
-# error("Can't compile, target is for x86-32")
-#else
-# if NACL_TARGET_SUBARCH != 32
-#  error("Can't compile, target is for x86-32")
-# endif
-#endif
-
-static NaClValidationStatus ApplyValidator_x86_32(
-    uintptr_t guest_addr,
-    uint8_t *data,
-    size_t size,
-    int stubout_mode,
-    int readonly_text,
-    const NaClCPUFeatures *f,
-    const struct NaClValidationMetadata *metadata,
-    struct NaClValidationCache *cache) {
-  /* TODO(jfb) Use a safe cast here. */
-  const NaClCPUFeaturesX86 *cpu_features = (NaClCPUFeaturesX86 *) f;
-  struct NCValidatorState *vstate;
-  int validator_result = 0;
-  void *query = NULL;
-
-  /* Check that the given parameter values are supported. */
-  if (stubout_mode && readonly_text)
-    return NaClValidationFailedNotImplemented;
-
-  if (!NaClArchSupportedX86(cpu_features))
-    return NaClValidationFailedCpuNotSupported;
-
-  /* Don't cache in stubout mode. */
-  if (stubout_mode)
-    cache = NULL;
-
-  /* If the validation caching interface is available, perform a query. */
-  if (cache != NULL)
-    query = cache->CreateQuery(cache->handle);
-  if (query != NULL) {
-    const char validator_id[] = "x86-32";
-    cache->AddData(query, (uint8_t *) validator_id, sizeof(validator_id));
-    cache->AddData(query, (uint8_t *) cpu_features, sizeof(*cpu_features));
-    NaClAddCodeIdentity(data, size, metadata, cache, query);
-    if (cache->QueryKnownToValidate(query)) {
-      cache->DestroyQuery(query);
-      return NaClValidationSucceeded;
-    }
-  }
-
-  /* Init then validator state. */
-  /* TODO(ncbray) make "detailed" a parameter. */
-  if (stubout_mode) {
-    vstate = NCValidateInitDetailed(guest_addr, size, cpu_features);
-  } else {
-    vstate = NCValidateInit(guest_addr, size, readonly_text, cpu_features);
-  }
-  if (vstate == NULL) {
-    if (query != NULL)
-      cache->DestroyQuery(query);
-    return NaClValidationFailedOutOfMemory;
-  }
-  NCValidateSetStubOutMode(vstate, stubout_mode);
-
-  /* Validate. */
-  NCValidateSegment(data, guest_addr, size, vstate);
-  validator_result = NCValidateFinish(vstate);
-
-  /* Cache the result if validation succeeded and the code was not modified. */
-  if (query != NULL) {
-    if (validator_result == 0 && !NCValidatorDidStubOut(vstate))
-      cache->SetKnownToValidate(query);
-    cache->DestroyQuery(query);
-  }
-
-  NCValidateFreeState(&vstate);
-  return (validator_result == 0 || stubout_mode)
-      ? NaClValidationSucceeded : NaClValidationFailed;
-}
-
-static NaClValidationStatus ApplyValidatorCodeReplacement_x86_32(
-    uintptr_t guest_addr,
-    uint8_t *data_old,
-    uint8_t *data_new,
-    size_t size,
-    const NaClCPUFeatures *f) {
-  /* TODO(jfb) Use a safe cast here. */
-  const NaClCPUFeaturesX86 *cpu_features = (NaClCPUFeaturesX86 *) f;
-
-  /* Check that the given parameter values are supported. */
-  if (!NaClArchSupportedX86(cpu_features))
-    return NaClValidationFailedCpuNotSupported;
-
-  return NCValidateSegmentPair(data_old, data_new, guest_addr,
-                               size, cpu_features)
-      ? NaClValidationSucceeded : NaClValidationFailed;
-}
-
-/* Copy a single instruction, avoiding the possibility of other threads
- * executing a partially changed instruction.
- */
-static Bool CopyInstruction(NCDecoderStatePair *self,
-                            NCDecoderInst *dinst_old,
-                            NCDecoderInst *dinst_new) {
-  NCRemainingMemory* mem_old = &dinst_old->dstate->memory;
-  NCRemainingMemory* mem_new = &dinst_new->dstate->memory;
-
-  return self->copy_func(mem_old->mpc, mem_new->mpc, mem_old->read_length);
-}
-
-/* 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;
-}
-
-static NaClValidationStatus ApplyValidatorCopy_x86_32(
-    uintptr_t guest_addr,
-    uint8_t *data_old,
-    uint8_t *data_new,
-    size_t size,
-    const NaClCPUFeatures *f,
-    NaClCopyInstructionFunc copy_func) {
-  /* TODO(jfb) Use a safe cast here. */
-  const NaClCPUFeaturesX86 *cpu_features = (NaClCPUFeaturesX86 *) f;
-
-  if (!NaClArchSupportedX86(cpu_features))
-    return NaClValidationFailedCpuNotSupported;
-
-  return ((0 == NCCopyCode(data_old, data_new, guest_addr, size, copy_func))
-            ? NaClValidationFailed : NaClValidationSucceeded);
-}
-
-static const struct NaClValidatorInterface validator = {
-  TRUE, /* Optional stubout_mode is implemented.                */
-  TRUE, /* Optional readonly_text is implemented.               */
-  TRUE, /* Optional code replacement functions are implemented. */
-  ApplyValidator_x86_32,
-  ApplyValidatorCopy_x86_32,
-  ApplyValidatorCodeReplacement_x86_32,
-  sizeof(NaClCPUFeaturesX86),
-  NaClSetAllCPUFeaturesX86,
-  NaClGetCurrentCPUFeaturesX86,
-  NaClFixCPUFeaturesX86,
-};
-
-const struct NaClValidatorInterface *NaClValidatorCreate_x86_32(void) {
-  return &validator;
-}