firmware/stub/vboot_api_stub.c

/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 *
 * Stub implementations of firmware-provided API functions.
 */

#define _STUB_IMPLEMENTATION_

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>

#include "vboot_api.h"

/* disable MSVC warnings on unused arguments */
__pragma(warning (disable: 4100))


/* U-Boot's printf uses '%L' for uint64_t. gcc uses '%l'. */
#define MAX_FMT 255
static char fmtbuf[MAX_FMT+1];
static const char *fixfmt(const char *format) {
  int i;
  for(i=0; i<MAX_FMT && format[i]; i++) {
    fmtbuf[i] = format[i];
    if(format[i] == '%' && format[i+1] == 'L') {
      fmtbuf[i+1] = 'l';
      i++;
    }
  }
  fmtbuf[i] = '\0';
  return fmtbuf;
}

void VbExError(const char* format, ...) {
  va_list ap;
  va_start(ap, format);
  fprintf(stderr, "ERROR: ");
  vfprintf(stderr, fixfmt(format), ap);
  va_end(ap);
  exit(1);
}


void VbExDebug(const char* format, ...) {
  va_list ap;
  va_start(ap, format);
  fprintf(stderr, "DEBUG: ");
  vfprintf(stderr, fixfmt(format), ap);
  va_end(ap);
}


void* VbExMalloc(size_t size) {
  void* p = malloc(size);
  if (!p) {
    /* Fatal Error. We must abort. */
    abort();
  }
  return p;
}


void VbExFree(void* ptr) {
  free(ptr);
}


uint64_t VbExGetTimer(void) {
  struct timeval tv;
  gettimeofday(&tv, NULL);
  return (uint64_t)tv.tv_sec * 1000000 + (uint64_t)tv.tv_usec;
}


void VbExSleepMs(uint32_t msec) {
}


VbError_t VbExBeep(uint32_t msec, uint32_t frequency) {
  return VBERROR_SUCCESS;
}


VbError_t VbExNvStorageRead(uint8_t* buf) {
  return VBERROR_SUCCESS;
}


VbError_t VbExNvStorageWrite(const uint8_t* buf) {
  return VBERROR_SUCCESS;
}


VbError_t VbExHashFirmwareBody(VbCommonParams* cparams,
                               uint32_t firmware_index) {
  return VBERROR_SUCCESS;
}


VbError_t VbExDisplayInit(uint32_t* width, uint32_t* height) {
  return VBERROR_SUCCESS;
}


VbError_t VbExDisplayBacklight(uint8_t enable) {
  return VBERROR_SUCCESS;
}


VbError_t VbExDisplayScreen(uint32_t screen_type) {
  return VBERROR_SUCCESS;
}


VbError_t VbExDisplayImage(uint32_t x, uint32_t y,
                           void* buffer, uint32_t buffersize) {
  return VBERROR_SUCCESS;
}


VbError_t VbExDisplayDebugInfo(const char* info_str) {
  return VBERROR_SUCCESS;
}


uint32_t VbExKeyboardRead(void) {
  return 0;
}


uint32_t VbExIsShutdownRequested(void) {
  return 0;
}

VbError_t VbExDecompress(void *inbuf, uint32_t in_size,
                         uint32_t compression_type,
                         void *outbuf, uint32_t *out_size) {
  return VBERROR_SUCCESS;
}

int VbExTrustEC(void) {
  return 1;
}

VbError_t VbExEcRunningRW(int *in_rw) {
  *in_rw = 0;
  return VBERROR_SUCCESS;
}

VbError_t VbExEcJumpToRW(void) {
  return VBERROR_SUCCESS;
}

VbError_t VbExEcRebootToRO(void) {
  /* Nothing to reboot, so all we can do is return failure. */
  return VBERROR_UNKNOWN;
}

VbError_t VbExEcStayInRO(void) {
  return VBERROR_SUCCESS;
}

#define SHA256_HASH_SIZE 32

VbError_t VbExEcHashRW(const uint8_t **hash, int *hash_size) {
  static const uint8_t fake_hash[32] = {1, 2, 3, 4};
  *hash = fake_hash;
  *hash_size = sizeof(fake_hash);
  return VBERROR_SUCCESS;
}

VbError_t VbExEcGetExpectedRW(enum VbSelectFirmware_t select,
                              const uint8_t **image, int *image_size) {
  static uint8_t fake_image[64] = {5, 6, 7, 8};
  *image = fake_image;
  *image_size = sizeof(fake_image);
  return VBERROR_SUCCESS;
}

VbError_t VbExEcUpdateRW(const uint8_t *image, int image_size) {
  return VBERROR_SUCCESS;
}

VbError_t VbExEcProtectRW(void) {
  return VBERROR_SUCCESS;
}