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Add more vboot_api_kernel tests

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BUG=chromium-os:38139
BRANCH=none
TEST=make runtests && FEATURES=test emerge-daisy vboot_reference

Change-Id: Ib280b80ba707f8a2141d728f78ae296774b1301a
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/42669
This commit is contained in:
Randall Spangler
2013-02-05 12:42:36 -08:00
committed by ChromeBot
parent 0714d9de56
commit 7f43669630
7 changed files with 1189 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
Makefile
View File

@@ -419,6 +419,9 @@ TEST_NAMES = \
vboot_api_devmode_tests \
vboot_api_firmware_tests \
vboot_api_kernel_tests \
vboot_api_kernel2_tests \
vboot_api_kernel3_tests \
vboot_api_kernel4_tests \
vboot_audio_tests \
vboot_common_tests \
vboot_common2_tests \
@@ -948,6 +951,9 @@ runmisctests: test_setup
${RUNTEST} ${BUILD_RUN}/tests/vboot_api_firmware_tests
${RUNTEST} ${BUILD_RUN}/tests/vboot_api_init_tests
${RUNTEST} ${BUILD_RUN}/tests/vboot_api_kernel_tests
${RUNTEST} ${BUILD_RUN}/tests/vboot_api_kernel2_tests
${RUNTEST} ${BUILD_RUN}/tests/vboot_api_kernel3_tests
${RUNTEST} ${BUILD_RUN}/tests/vboot_api_kernel4_tests
${RUNTEST} ${BUILD_RUN}/tests/vboot_audio_tests
${RUNTEST} ${BUILD_RUN}/tests/vboot_common_tests
${RUNTEST} ${BUILD_RUN}/tests/vboot_common2_tests ${TEST_KEYS}

45
firmware/lib/include/vboot_kernel.h
View File

@@ -10,7 +10,9 @@
#define VBOOT_REFERENCE_VBOOT_KERNEL_H_
#include "cgptlib.h"
#include "load_firmware_fw.h"
#include "vboot_api.h"
#include "vboot_kernel.h"
/**
* Allocate and read GPT data from the drive. The sector_bytes and
@@ -26,4 +28,47 @@ int AllocAndReadGptData(VbExDiskHandle_t disk_handle, GptData *gptdata);
*/
int WriteAndFreeGptData(VbExDiskHandle_t disk_handle, GptData *gptdata);
/**
* Accessors for unit tests only.
*/
VbNvContext *VbApiKernelGetVnc(void);
/**
* Try to load a kernel.
*/
uint32_t VbTryLoadKernel(VbCommonParams *cparams, LoadKernelParams *p,
uint32_t get_info_flags);
/**
* Ask the user to confirm something.
*
* We should display whatever the question is first, then call this. ESC is
* always "no", ENTER is always "yes", and we'll specify what SPACE means. We
* don't return until one of those keys is pressed, or until asked to shut
* down.
*
* Returns: 1=yes, 0=no, -1 = shutdown.
*/
int VbUserConfirms(VbCommonParams *cparams, int space_means_no);
/**
* Handle a normal boot.
*/
VbError_t VbBootNormal(VbCommonParams *cparams, LoadKernelParams *p);
/**
* Handle a developer-mode boot.
*/
VbError_t VbBootDeveloper(VbCommonParams *cparams, LoadKernelParams *p);
/**
* Handle a recovery-mode boot.
*/
VbError_t VbBootRecovery(VbCommonParams *cparams, LoadKernelParams *p);
/**
* Sync EC firmware to expected version.
*/
VbError_t VbEcSoftwareSync(VbCommonParams *cparams);
#endif /* VBOOT_REFERENCE_VBOOT_KERNEL_H_ */

33
firmware/lib/vboot_api_kernel.c
View File

@@ -28,7 +28,7 @@ VbNvContext *VbApiKernelGetVnc(void)
#endif
/**
* Set recovery request
* Set recovery request (called from vboot_api_kernel.c functions only)
*/
static void VbSetRecoveryRequest(uint32_t recovery_request)
{
@@ -125,17 +125,7 @@ uint32_t VbTryLoadKernel(VbCommonParams *cparams, LoadKernelParams *p,
#define CONFIRM_KEY_DELAY 20 /* Check confirm screen keys every 20ms */
/**
* Ask the user to confirm something.
*
* We should display whatever the question is first, then call this. ESC is
* always "no", ENTER is always "yes", and we'll specify what SPACE means. We
* don't return until one of those keys is pressed, or until asked to shut
* down.
*
* Returns: 1=yes, 0=no, -1 = shutdown.
*/
static int VbUserConfirms(VbCommonParams *cparams, int space_means_no)
int VbUserConfirms(VbCommonParams *cparams, int space_means_no)
{
uint32_t key;
@@ -171,9 +161,6 @@ static int VbUserConfirms(VbCommonParams *cparams, int space_means_no)
return -1;
}
/**
* Handle a normal boot.
*/
VbError_t VbBootNormal(VbCommonParams *cparams, LoadKernelParams *p)
{
/* Boot from fixed disk only */
@@ -181,9 +168,6 @@ VbError_t VbBootNormal(VbCommonParams *cparams, LoadKernelParams *p)
return VbTryLoadKernel(cparams, p, VB_DISK_FLAG_FIXED);
}
/**
* Handle a developer-mode boot.
*/
VbError_t VbBootDeveloper(VbCommonParams *cparams, LoadKernelParams *p)
{
GoogleBinaryBlockHeader *gbb =
@@ -320,11 +304,11 @@ VbError_t VbBootDeveloper(VbCommonParams *cparams, LoadKernelParams *p)
VbExBeep(120, 400);
break;
case VB_KEY_CTRL_ENTER:
/*
* The Ctrl-Enter is special for Lumpy test purpose; fall through
* to Ctrl+U handler.
*/
case VB_KEY_CTRL_ENTER:
/*
* The Ctrl-Enter is special for Lumpy test purpose;
* fall through to Ctrl+U handler.
*/
case 0x15:
/* Ctrl+U = try USB boot, or beep if failure */
VBDEBUG(("VbBootDeveloper() - "
@@ -393,9 +377,6 @@ VbError_t VbBootDeveloper(VbCommonParams *cparams, LoadKernelParams *p)
#define REC_DISK_DELAY 1000 /* Check disks every 1s */
#define REC_KEY_DELAY 20 /* Check keys every 20ms */
/**
* Handle a recovery-mode boot.
*/
VbError_t VbBootRecovery(VbCommonParams *cparams, LoadKernelParams *p)
{
VbSharedDataHeader *shared =

554
tests/vboot_api_kernel2_tests.c Normal file
View File

@@ -0,0 +1,554 @@
/* Copyright (c) 2013 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.
*
* Tests for vboot_api_kernel, part 2
*/
#include <stdio.h>
#include <stdlib.h>
#include "gbb_header.h"
#include "host_common.h"
#include "load_kernel_fw.h"
#include "rollback_index.h"
#include "test_common.h"
#include "vboot_audio.h"
#include "vboot_common.h"
#include "vboot_kernel.h"
#include "vboot_nvstorage.h"
#include "vboot_struct.h"
/* Mock data */
static VbCommonParams cparams;
static uint8_t shared_data[VB_SHARED_DATA_MIN_SIZE];
static VbSharedDataHeader *shared = (VbSharedDataHeader *)shared_data;
static GoogleBinaryBlockHeader gbb;
static LoadKernelParams lkp;
static int shutdown_request_calls_left;
static int audio_looping_calls_left;
static uint32_t vbtlk_retval;
static int vbexlegacy_called;
static int trust_ec;
static int virtdev_set;
static uint32_t virtdev_retval;
static uint32_t mock_keypress[8];
static uint32_t mock_keypress_count;
static uint32_t screens_displayed[8];
static uint32_t screens_count = 0;
static uint32_t mock_num_disks[8];
static uint32_t mock_num_disks_count;
/* Reset mock data (for use before each test) */
static void ResetMocks(void)
{
Memset(&cparams, 0, sizeof(cparams));
cparams.shared_data_size = sizeof(shared_data);
cparams.shared_data_blob = shared_data;
cparams.gbb_data = &gbb;
Memset(&gbb, 0, sizeof(gbb));
gbb.major_version = GBB_MAJOR_VER;
gbb.minor_version = GBB_MINOR_VER;
gbb.flags = 0;
/*
* Only the outermost vboot_api_kernel call sets vboot_api_kernel's
* vnc. So clear it here too.
*/
Memset(VbApiKernelGetVnc(), 0, sizeof(VbNvContext));
VbNvSetup(VbApiKernelGetVnc());
VbNvTeardown(VbApiKernelGetVnc()); /* So CRC gets generated */
Memset(&shared_data, 0, sizeof(shared_data));
VbSharedDataInit(shared, sizeof(shared_data));
Memset(&lkp, 0, sizeof(lkp));
shutdown_request_calls_left = -1;
audio_looping_calls_left = 30;
vbtlk_retval = 1000;
vbexlegacy_called = 0;
trust_ec = 0;
virtdev_set = 0;
virtdev_retval = 0;
Memset(screens_displayed, 0, sizeof(screens_displayed));
screens_count = 0;
Memset(mock_keypress, 0, sizeof(mock_keypress));
mock_keypress_count = 0;
Memset(mock_num_disks, 0, sizeof(mock_num_disks));
mock_num_disks_count = 0;
}
/* Mock functions */
uint32_t VbExIsShutdownRequested(void)
{
if (shutdown_request_calls_left == 0)
return 1;
else if (shutdown_request_calls_left > 0)
shutdown_request_calls_left--;
return 0;
}
uint32_t VbExKeyboardRead(void)
{
if (mock_keypress_count < ARRAY_SIZE(mock_keypress))
return mock_keypress[mock_keypress_count++];
else
return 0;
}
int VbExLegacy(void)
{
vbexlegacy_called++;
return 0;
}
VbError_t VbExDiskGetInfo(VbDiskInfo **infos_ptr, uint32_t *count,
uint32_t disk_flags)
{
if (mock_num_disks_count < ARRAY_SIZE(mock_num_disks)) {
if (mock_num_disks[mock_num_disks_count] == -1)
return VBERROR_SIMULATED;
else
*count = mock_num_disks[mock_num_disks_count++];
} else {
*count = 0;
}
return VBERROR_SUCCESS;
}
VbError_t VbExDiskFreeInfo(VbDiskInfo *infos,
VbExDiskHandle_t preserve_handle)
{
return VBERROR_SUCCESS;
}
int VbExTrustEC(void)
{
return trust_ec;
}
int VbAudioLooping(VbAudioContext *audio)
{
if (audio_looping_calls_left == 0)
return 0;
else if (audio_looping_calls_left > 0)
audio_looping_calls_left--;
return 1;
}
uint32_t VbTryLoadKernel(VbCommonParams *cparams, LoadKernelParams *p,
uint32_t get_info_flags)
{
return vbtlk_retval + get_info_flags;
}
VbError_t VbDisplayScreen(VbCommonParams *cparams, uint32_t screen, int force,
VbNvContext *vncptr)
{
if (screens_count < ARRAY_SIZE(screens_displayed))
screens_displayed[screens_count++] = screen;
return VBERROR_SUCCESS;
}
uint32_t SetVirtualDevMode(int val)
{
virtdev_set = val;
return virtdev_retval;
}
/* Tests */
static void VbUserConfirmsTest(void)
{
printf("Testing VbUserConfirms()...\n");
ResetMocks();
shutdown_request_calls_left = 1;
TEST_EQ(VbUserConfirms(&cparams, 0), -1, "Shutdown requested");
ResetMocks();
mock_keypress[0] = '\r';
TEST_EQ(VbUserConfirms(&cparams, 0), 1, "Enter");
ResetMocks();
mock_keypress[0] = 0x1b;
TEST_EQ(VbUserConfirms(&cparams, 0), 0, "Esc");
ResetMocks();
mock_keypress[0] = ' ';
shutdown_request_calls_left = 1;
TEST_EQ(VbUserConfirms(&cparams, 1), 0, "Space means no");
ResetMocks();
mock_keypress[0] = ' ';
shutdown_request_calls_left = 1;
TEST_EQ(VbUserConfirms(&cparams, 0), -1, "Space ignored");
printf("...done.\n");
}
static void VbBootTest(void)
{
ResetMocks();
TEST_EQ(VbBootNormal(&cparams, &lkp), 1002, "VbBootNormal()");
}
static void VbBootDevTest(void)
{
uint32_t u;
printf("Testing VbBootDeveloper()...\n");
/* Proceed after timeout */
ResetMocks();
TEST_EQ(VbBootDeveloper(&cparams, &lkp), 1002, "Timeout");
TEST_EQ(screens_displayed[0], VB_SCREEN_DEVELOPER_WARNING,
" warning screen");
VbNvGet(VbApiKernelGetVnc(), VBNV_RECOVERY_REQUEST, &u);
TEST_EQ(u, 0, " recovery reason");
TEST_EQ(audio_looping_calls_left, 0, " used up audio");
/* Up arrow is uninteresting / passed to VbCheckDisplayKey() */
ResetMocks();
mock_keypress[0] = VB_KEY_UP;
TEST_EQ(VbBootDeveloper(&cparams, &lkp), 1002, "Up arrow");
/* Shutdown requested in loop */
ResetMocks();
shutdown_request_calls_left = 2;
TEST_EQ(VbBootDeveloper(&cparams, &lkp), VBERROR_SHUTDOWN_REQUESTED,
"Shutdown requested");
TEST_NEQ(audio_looping_calls_left, 0, " aborts audio");
/* Space goes straight to recovery if no virtual dev switch */
ResetMocks();
mock_keypress[0] = ' ';
TEST_EQ(VbBootDeveloper(&cparams, &lkp), VBERROR_LOAD_KERNEL_RECOVERY,
"Space = recovery");
VbNvGet(VbApiKernelGetVnc(), VBNV_RECOVERY_REQUEST, &u);
TEST_EQ(u, VBNV_RECOVERY_RW_DEV_SCREEN, " recovery reason");
/* Space asks to disable virtual dev switch */
ResetMocks();
shared->flags = VBSD_HONOR_VIRT_DEV_SWITCH | VBSD_BOOT_DEV_SWITCH_ON;
mock_keypress[0] = ' ';
mock_keypress[1] = '\r';
TEST_EQ(VbBootDeveloper(&cparams, &lkp), VBERROR_TPM_REBOOT_REQUIRED,
"Space = tonorm");
TEST_EQ(screens_displayed[0], VB_SCREEN_DEVELOPER_WARNING,
" warning screen");
TEST_EQ(screens_displayed[1], VB_SCREEN_DEVELOPER_TO_NORM,
" tonorm screen");
TEST_EQ(screens_displayed[2], VB_SCREEN_TO_NORM_CONFIRMED,
" confirm screen");
VbNvGet(VbApiKernelGetVnc(), VBNV_DISABLE_DEV_REQUEST, &u);
TEST_EQ(u, 1, " disable dev request");
/* Space-space doesn't disable it */
ResetMocks();
shared->flags = VBSD_HONOR_VIRT_DEV_SWITCH | VBSD_BOOT_DEV_SWITCH_ON;
mock_keypress[0] = ' ';
mock_keypress[1] = ' ';
mock_keypress[2] = 0x1b;
TEST_EQ(VbBootDeveloper(&cparams, &lkp), 1002, "Space-space");
TEST_EQ(screens_displayed[0], VB_SCREEN_DEVELOPER_WARNING,
" warning screen");
TEST_EQ(screens_displayed[1], VB_SCREEN_DEVELOPER_TO_NORM,
" tonorm screen");
TEST_EQ(screens_displayed[2], VB_SCREEN_DEVELOPER_WARNING,
" warning screen");
/* Enter doesn't by default */
ResetMocks();
shared->flags = VBSD_HONOR_VIRT_DEV_SWITCH | VBSD_BOOT_DEV_SWITCH_ON;
mock_keypress[0] = '\r';
mock_keypress[1] = '\r';
TEST_EQ(VbBootDeveloper(&cparams, &lkp), 1002, "Enter ignored");
/* Enter does if GBB flag set */
ResetMocks();
shared->flags = VBSD_HONOR_VIRT_DEV_SWITCH | VBSD_BOOT_DEV_SWITCH_ON;
gbb.flags |= GBB_FLAG_ENTER_TRIGGERS_TONORM;
mock_keypress[0] = '\r';
mock_keypress[1] = '\r';
TEST_EQ(VbBootDeveloper(&cparams, &lkp), VBERROR_TPM_REBOOT_REQUIRED,
"Enter = tonorm");
/* Tonorm ignored if GBB forces dev switch on */
ResetMocks();
shared->flags = VBSD_HONOR_VIRT_DEV_SWITCH | VBSD_BOOT_DEV_SWITCH_ON;
gbb.flags |= GBB_FLAG_FORCE_DEV_SWITCH_ON;
mock_keypress[0] = ' ';
mock_keypress[1] = '\r';
TEST_EQ(VbBootDeveloper(&cparams, &lkp), 1002, "Can't tonorm gbb-dev");
/* Shutdown requested at tonorm screen */
ResetMocks();
shared->flags = VBSD_HONOR_VIRT_DEV_SWITCH | VBSD_BOOT_DEV_SWITCH_ON;
mock_keypress[0] = ' ';
shutdown_request_calls_left = 2;
TEST_EQ(VbBootDeveloper(&cparams, &lkp), VBERROR_SHUTDOWN_REQUESTED,
"Shutdown requested at tonorm");
TEST_EQ(screens_displayed[0], VB_SCREEN_DEVELOPER_WARNING,
" warning screen");
TEST_EQ(screens_displayed[1], VB_SCREEN_DEVELOPER_TO_NORM,
" tonorm screen");
/* Ctrl+D dismisses warning */
ResetMocks();
mock_keypress[0] = 0x04;
TEST_EQ(VbBootDeveloper(&cparams, &lkp), 1002, "Ctrl+D");
VbNvGet(VbApiKernelGetVnc(), VBNV_RECOVERY_REQUEST, &u);
TEST_EQ(u, 0, " recovery reason");
TEST_NEQ(audio_looping_calls_left, 0, " aborts audio");
/* Ctrl+L tries legacy boot mode only if enabled */
ResetMocks();
mock_keypress[0] = 0x0c;
TEST_EQ(VbBootDeveloper(&cparams, &lkp), 1002, "Ctrl+L normal");
TEST_EQ(vbexlegacy_called, 0, " not legacy");
ResetMocks();
gbb.flags |= GBB_FLAG_FORCE_DEV_BOOT_LEGACY;
mock_keypress[0] = 0x0c;
TEST_EQ(VbBootDeveloper(&cparams, &lkp), 1002, "Ctrl+L force legacy");
TEST_EQ(vbexlegacy_called, 1, " try legacy");
ResetMocks();
VbNvSet(VbApiKernelGetVnc(), VBNV_DEV_BOOT_LEGACY, 1);
mock_keypress[0] = 0x0c;
TEST_EQ(VbBootDeveloper(&cparams, &lkp), 1002, "Ctrl+L nv legacy");
TEST_EQ(vbexlegacy_called, 1, " try legacy");
/* Ctrl+U boots USB only if enabled */
ResetMocks();
mock_keypress[0] = 0x15;
TEST_EQ(VbBootDeveloper(&cparams, &lkp), 1002, "Ctrl+U normal");
/* Ctrl+U enabled, with good USB boot */
ResetMocks();
VbNvSet(VbApiKernelGetVnc(), VBNV_DEV_BOOT_USB, 1);
mock_keypress[0] = 0x15;
vbtlk_retval = VBERROR_SUCCESS - VB_DISK_FLAG_REMOVABLE;
TEST_EQ(VbBootDeveloper(&cparams, &lkp), 0, "Ctrl+U USB");
/* Ctrl+U enabled via GBB */
ResetMocks();
gbb.flags |= GBB_FLAG_FORCE_DEV_BOOT_USB;
mock_keypress[0] = 0x15;
vbtlk_retval = VBERROR_SUCCESS - VB_DISK_FLAG_REMOVABLE;
TEST_EQ(VbBootDeveloper(&cparams, &lkp), 0, "Ctrl+U force USB");
/* If no USB, eventually times out and tries fixed disk */
ResetMocks();
VbNvSet(VbApiKernelGetVnc(), VBNV_DEV_BOOT_USB, 1);
mock_keypress[0] = 0x15;
TEST_EQ(VbBootDeveloper(&cparams, &lkp), 1002, "Ctrl+U enabled");
TEST_EQ(vbexlegacy_called, 0, " not legacy");
VbNvGet(VbApiKernelGetVnc(), VBNV_RECOVERY_REQUEST, &u);
TEST_EQ(u, 0, " recovery reason");
TEST_EQ(audio_looping_calls_left, 0, " used up audio");
printf("...done.\n");
}
static void VbBootRecTest(void)
{
uint32_t u;
printf("Testing VbBootRecovery()...\n");
/* Shutdown requested in loop */
ResetMocks();
shutdown_request_calls_left = 10;
TEST_EQ(VbBootRecovery(&cparams, &lkp), VBERROR_SHUTDOWN_REQUESTED,
"Shutdown requested");
VbNvGet(VbApiKernelGetVnc(), VBNV_RECOVERY_REQUEST, &u);
TEST_EQ(u, 0, " recovery reason");
TEST_EQ(screens_displayed[0], VB_SCREEN_BLANK,
" blank screen");
TEST_EQ(screens_displayed[1], VB_SCREEN_RECOVERY_NO_GOOD,
" no good screen");
/* Disk inserted after start */
ResetMocks();
vbtlk_retval = VBERROR_SUCCESS - VB_DISK_FLAG_REMOVABLE;
TEST_EQ(VbBootRecovery(&cparams, &lkp), 0, "Good");
/* No disk inserted */
ResetMocks();
vbtlk_retval = VBERROR_NO_DISK_FOUND - VB_DISK_FLAG_REMOVABLE;
shutdown_request_calls_left = 10;
TEST_EQ(VbBootRecovery(&cparams, &lkp), VBERROR_SHUTDOWN_REQUESTED,
"Bad disk");
TEST_EQ(screens_displayed[0], VB_SCREEN_BLANK,
" blank screen");
TEST_EQ(screens_displayed[1], VB_SCREEN_RECOVERY_INSERT,
" insert screen");
/* Remove disks */
ResetMocks();
shutdown_request_calls_left = 100;
mock_num_disks[0] = 1;
mock_num_disks[1] = 1;
vbtlk_retval = VBERROR_NO_DISK_FOUND - VB_DISK_FLAG_REMOVABLE;
TEST_EQ(VbBootRecovery(&cparams, &lkp), VBERROR_SHUTDOWN_REQUESTED,
"Remove");
TEST_EQ(screens_displayed[0], VB_SCREEN_RECOVERY_REMOVE,
" remove screen");
TEST_EQ(screens_displayed[1], VB_SCREEN_RECOVERY_REMOVE,
" remove screen");
TEST_EQ(screens_displayed[2], VB_SCREEN_BLANK,
" blank screen");
TEST_EQ(screens_displayed[3], VB_SCREEN_RECOVERY_INSERT,
" insert screen");
/* No removal if dev switch is on */
ResetMocks();
shutdown_request_calls_left = 100;
mock_num_disks[0] = 1;
mock_num_disks[1] = 1;
shared->flags |= VBSD_BOOT_DEV_SWITCH_ON;
vbtlk_retval = VBERROR_NO_DISK_FOUND - VB_DISK_FLAG_REMOVABLE;
TEST_EQ(VbBootRecovery(&cparams, &lkp), VBERROR_SHUTDOWN_REQUESTED,
"No remove in dev");
TEST_EQ(screens_displayed[0], VB_SCREEN_RECOVERY_INSERT,
" insert screen");
/* No removal if recovery button physically pressed */
ResetMocks();
shutdown_request_calls_left = 100;
mock_num_disks[0] = 1;
mock_num_disks[1] = 1;
shared->flags |= VBSD_BOOT_REC_SWITCH_ON;
vbtlk_retval = VBERROR_NO_DISK_FOUND - VB_DISK_FLAG_REMOVABLE;
TEST_EQ(VbBootRecovery(&cparams, &lkp), VBERROR_SHUTDOWN_REQUESTED,
"No remove in rec");
TEST_EQ(screens_displayed[0], VB_SCREEN_RECOVERY_INSERT,
" insert screen");
/* Bad disk count doesn't require removal */
ResetMocks();
mock_num_disks[0] = -1;
vbtlk_retval = VBERROR_NO_DISK_FOUND - VB_DISK_FLAG_REMOVABLE;
shutdown_request_calls_left = 10;
TEST_EQ(VbBootRecovery(&cparams, &lkp), VBERROR_SHUTDOWN_REQUESTED,
"Bad disk count");
TEST_EQ(screens_displayed[0], VB_SCREEN_BLANK,
" blank screen");
TEST_EQ(screens_displayed[1], VB_SCREEN_RECOVERY_INSERT,
" insert screen");
/* Ctrl+D ignored for many reasons... */
ResetMocks();
shared->flags = VBSD_HONOR_VIRT_DEV_SWITCH | VBSD_BOOT_REC_SWITCH_ON;
shutdown_request_calls_left = 100;
mock_keypress[0] = 0x04;
trust_ec = 0;
TEST_EQ(VbBootRecovery(&cparams, &lkp), VBERROR_SHUTDOWN_REQUESTED,
"Ctrl+D ignored if EC not trusted");
TEST_EQ(virtdev_set, 0, " virtual dev mode off");
TEST_NEQ(screens_displayed[1], VB_SCREEN_RECOVERY_TO_DEV,
" todev screen");
ResetMocks();
shared->flags = VBSD_HONOR_VIRT_DEV_SWITCH | VBSD_BOOT_REC_SWITCH_ON |
VBSD_BOOT_DEV_SWITCH_ON;
trust_ec = 1;
shutdown_request_calls_left = 100;
mock_keypress[0] = 0x04;
TEST_EQ(VbBootRecovery(&cparams, &lkp), VBERROR_SHUTDOWN_REQUESTED,
"Ctrl+D ignored if already in dev mode");
TEST_EQ(virtdev_set, 0, " virtual dev mode off");
TEST_NEQ(screens_displayed[1], VB_SCREEN_RECOVERY_TO_DEV,
" todev screen");
ResetMocks();
shared->flags = VBSD_HONOR_VIRT_DEV_SWITCH;
trust_ec = 1;
shutdown_request_calls_left = 100;
mock_keypress[0] = 0x04;
TEST_EQ(VbBootRecovery(&cparams, &lkp), VBERROR_SHUTDOWN_REQUESTED,
"Ctrl+D ignored if recovery not manually triggered");
TEST_EQ(virtdev_set, 0, " virtual dev mode off");
TEST_NEQ(screens_displayed[1], VB_SCREEN_RECOVERY_TO_DEV,
" todev screen");
ResetMocks();
shared->flags = VBSD_BOOT_REC_SWITCH_ON;
trust_ec = 1;
shutdown_request_calls_left = 100;
mock_keypress[0] = 0x04;
TEST_EQ(VbBootRecovery(&cparams, &lkp), VBERROR_SHUTDOWN_REQUESTED,
"Ctrl+D ignored if no virtual dev switch");
TEST_EQ(virtdev_set, 0, " virtual dev mode off");
TEST_NEQ(screens_displayed[1], VB_SCREEN_RECOVERY_TO_DEV,
" todev screen");
/* Ctrl+D then space means don't enable */
ResetMocks();
shared->flags = VBSD_HONOR_VIRT_DEV_SWITCH | VBSD_BOOT_REC_SWITCH_ON;
shutdown_request_calls_left = 100;
vbtlk_retval = VBERROR_NO_DISK_FOUND - VB_DISK_FLAG_REMOVABLE;
trust_ec = 1;
mock_keypress[0] = 0x04;
mock_keypress[1] = ' ';
TEST_EQ(VbBootRecovery(&cparams, &lkp), VBERROR_SHUTDOWN_REQUESTED,
"Ctrl+D todev abort");
TEST_EQ(screens_displayed[0], VB_SCREEN_RECOVERY_INSERT,
" insert screen");
TEST_EQ(screens_displayed[1], VB_SCREEN_RECOVERY_TO_DEV,
" todev screen");
TEST_EQ(screens_displayed[2], VB_SCREEN_RECOVERY_INSERT,
" insert screen");
TEST_EQ(virtdev_set, 0, " virtual dev mode off");
/* Ctrl+D then enter means enable */
ResetMocks();
shared->flags = VBSD_HONOR_VIRT_DEV_SWITCH | VBSD_BOOT_REC_SWITCH_ON;
shutdown_request_calls_left = 100;
vbtlk_retval = VBERROR_NO_DISK_FOUND - VB_DISK_FLAG_REMOVABLE;
trust_ec = 1;
mock_keypress[0] = 0x04;
mock_keypress[1] = '\r';
TEST_EQ(VbBootRecovery(&cparams, &lkp), VBERROR_TPM_REBOOT_REQUIRED,
"Ctrl+D todev confirm");
TEST_EQ(virtdev_set, 1, " virtual dev mode on");
/* Handle TPM error in enabling dev mode */
ResetMocks();
shared->flags = VBSD_HONOR_VIRT_DEV_SWITCH | VBSD_BOOT_REC_SWITCH_ON;
shutdown_request_calls_left = 100;
vbtlk_retval = VBERROR_NO_DISK_FOUND - VB_DISK_FLAG_REMOVABLE;
trust_ec = 1;
mock_keypress[0] = 0x04;
mock_keypress[1] = '\r';
virtdev_retval = VBERROR_SIMULATED;
TEST_EQ(VbBootRecovery(&cparams, &lkp), VBERROR_TPM_SET_BOOT_MODE_STATE,
"Ctrl+D todev failure");
printf("...done.\n");
}
int main(void)
{
VbUserConfirmsTest();
VbBootTest();
VbBootDevTest();
VbBootRecTest();
return gTestSuccess ? 0 : 255;
}

335
tests/vboot_api_kernel3_tests.c Normal file
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@@ -0,0 +1,335 @@
/* Copyright (c) 2013 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.
*
* Tests for vboot_api_kernel, part 3 - software sync
*/
#include <stdio.h>
#include <stdlib.h>
#include "gbb_header.h"
#include "host_common.h"
#include "load_kernel_fw.h"
#include "rollback_index.h"
#include "test_common.h"
#include "vboot_audio.h"
#include "vboot_common.h"
#include "vboot_kernel.h"
#include "vboot_nvstorage.h"
#include "vboot_struct.h"
/* Mock data */
static VbCommonParams cparams;
static uint8_t shared_data[VB_SHARED_DATA_MIN_SIZE];
static VbSharedDataHeader *shared = (VbSharedDataHeader *)shared_data;
static GoogleBinaryBlockHeader gbb;
static int trust_ec;
static int mock_in_rw;
static VbError_t in_rw_retval;
static int protect_retval;
static int ec_protected;
static int run_retval;
static int ec_run_image;
static int update_retval;
static int ec_updated;
static int get_expected_retval;
static uint8_t mock_ec_hash[32];
static int mock_ec_hash_size;
static uint8_t want_ec_hash[32];
static int want_ec_hash_size;
static uint8_t mock_sha[32];
static uint32_t screens_displayed[8];
static uint32_t screens_count = 0;
/* Reset mock data (for use before each test) */
static void ResetMocks(void)
{
Memset(&cparams, 0, sizeof(cparams));
cparams.shared_data_size = sizeof(shared_data);
cparams.shared_data_blob = shared_data;
cparams.gbb_data = &gbb;
Memset(&gbb, 0, sizeof(gbb));
gbb.major_version = GBB_MAJOR_VER;
gbb.minor_version = GBB_MINOR_VER;
gbb.flags = 0;
/*
* Only the outermost vboot_api_kernel call sets vboot_api_kernel's
* vnc. So clear it here too.
*/
Memset(VbApiKernelGetVnc(), 0, sizeof(VbNvContext));
VbNvSetup(VbApiKernelGetVnc());
VbNvTeardown(VbApiKernelGetVnc()); /* So CRC gets generated */
Memset(&shared_data, 0, sizeof(shared_data));
VbSharedDataInit(shared, sizeof(shared_data));
trust_ec = 0;
mock_in_rw = 0;
ec_protected = 0;
ec_run_image = -1; /* 0 = RO, 1 = RW */
ec_updated = 0;
in_rw_retval = VBERROR_SUCCESS;
protect_retval = VBERROR_SUCCESS;
update_retval = VBERROR_SUCCESS;
run_retval = VBERROR_SUCCESS;
get_expected_retval = VBERROR_SUCCESS;
Memset(mock_ec_hash, 0, sizeof(mock_ec_hash));
mock_ec_hash[0] = 42;
mock_ec_hash_size = sizeof(mock_ec_hash);
Memset(want_ec_hash, 0, sizeof(want_ec_hash));
want_ec_hash[0] = 42;
want_ec_hash_size = sizeof(want_ec_hash);
Memset(mock_sha, 0, sizeof(want_ec_hash));
mock_sha[0] = 42;
// TODO: ensure these are actually needed
Memset(screens_displayed, 0, sizeof(screens_displayed));
screens_count = 0;
}
/* Mock functions */
int VbExTrustEC(void)
{
return trust_ec;
}
VbError_t VbExEcRunningRW(int *in_rw)
{
*in_rw = mock_in_rw;
return in_rw_retval;
}
VbError_t VbExEcProtectRW(void)
{
ec_protected = 1;
return protect_retval;
}
VbError_t VbExEcStayInRO(void)
{
ec_run_image = 0;
return run_retval;
}
VbError_t VbExEcJumpToRW(void)
{
ec_run_image = 1;
return run_retval;
}
VbError_t VbExEcHashRW(const uint8_t **hash, int *hash_size)
{
*hash = mock_ec_hash;
*hash_size = mock_ec_hash_size;
return mock_ec_hash_size ? VBERROR_SUCCESS : VBERROR_SIMULATED;
}
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 get_expected_retval;
}
VbError_t VbExEcGetExpectedRWHash(enum VbSelectFirmware_t select,
const uint8_t **hash, int *hash_size)
{
*hash = want_ec_hash;
*hash_size = want_ec_hash_size;
if (want_ec_hash_size == -1)
return VBERROR_EC_GET_EXPECTED_HASH_FROM_IMAGE;
else
return want_ec_hash_size ? VBERROR_SUCCESS : VBERROR_SIMULATED;
}
uint8_t *internal_SHA256(const uint8_t *data, uint64_t len, uint8_t *digest)
{
Memcpy(digest, mock_sha, sizeof(mock_sha));
return digest;
}
VbError_t VbExEcUpdateRW(const uint8_t *image, int image_size)
{
ec_updated = 1;
return update_retval;
}
VbError_t VbDisplayScreen(VbCommonParams *cparams, uint32_t screen, int force,
VbNvContext *vncptr)
{
if (screens_count < ARRAY_SIZE(screens_displayed))
screens_displayed[screens_count++] = screen;
return VBERROR_SUCCESS;
}
static void test_ssync(VbError_t retval, int recovery_reason, const char *desc)
{
uint32_t u;
TEST_EQ(VbEcSoftwareSync(&cparams), retval, desc);
VbNvGet(VbApiKernelGetVnc(), VBNV_RECOVERY_REQUEST, &u);
TEST_EQ(u, recovery_reason, " recovery reason");
}
/* Tests */
static void VbSoftwareSyncTest(void)
{
/* Recovery cases */
ResetMocks();
shared->recovery_reason = 123;
test_ssync(0, 0, "In recovery, EC-RO");
TEST_EQ(ec_protected, 0, " ec protected");
ResetMocks();
shared->recovery_reason = 123;
mock_in_rw = 1;
test_ssync(VBERROR_EC_REBOOT_TO_RO_REQUIRED,
123, "Recovery needs EC-RO");
/* AP-RO cases */
ResetMocks();
in_rw_retval = VBERROR_SIMULATED;
test_ssync(VBERROR_EC_REBOOT_TO_RO_REQUIRED,
VBNV_RECOVERY_EC_UNKNOWN_IMAGE, "Unknown EC image");
ResetMocks();
shared->flags |= VBSD_LF_USE_RO_NORMAL;
mock_in_rw = 1;
test_ssync(VBERROR_EC_REBOOT_TO_RO_REQUIRED,
0, "AP-RO needs EC-RO");
ResetMocks();
shared->flags |= VBSD_LF_USE_RO_NORMAL;
test_ssync(0, 0, "AP-RO, EC-RO");
TEST_EQ(ec_protected, 1, " ec protected");
TEST_EQ(ec_run_image, 0, " ec run image");
ResetMocks();
shared->flags |= VBSD_LF_USE_RO_NORMAL;
run_retval = VBERROR_SIMULATED;
test_ssync(VBERROR_EC_REBOOT_TO_RO_REQUIRED,
VBNV_RECOVERY_EC_SOFTWARE_SYNC, "Stay in RO fail");
ResetMocks();
shared->flags |= VBSD_LF_USE_RO_NORMAL;
protect_retval = VBERROR_SIMULATED;
test_ssync(VBERROR_SIMULATED,
VBNV_RECOVERY_EC_PROTECT, "Protect error");
/* Calculate hashes */
ResetMocks();
mock_ec_hash_size = 0;
test_ssync(VBERROR_EC_REBOOT_TO_RO_REQUIRED,
VBNV_RECOVERY_EC_HASH_FAILED, "Bad EC hash");
ResetMocks();
mock_ec_hash_size = 16;
test_ssync(VBERROR_EC_REBOOT_TO_RO_REQUIRED,
VBNV_RECOVERY_EC_HASH_SIZE, "Bad EC hash size");
ResetMocks();
want_ec_hash_size = 0;
test_ssync(VBERROR_EC_REBOOT_TO_RO_REQUIRED,
VBNV_RECOVERY_EC_EXPECTED_HASH, "Bad precalculated hash");
ResetMocks();
want_ec_hash_size = 16;
test_ssync(VBERROR_EC_REBOOT_TO_RO_REQUIRED,
VBNV_RECOVERY_EC_EXPECTED_HASH,
"Bad precalculated hash size");
ResetMocks();
mock_in_rw = 1;
want_ec_hash_size = -1;
test_ssync(0, 0, "No precomputed hash");
ResetMocks();
want_ec_hash_size = -1;
get_expected_retval = VBERROR_SIMULATED;
test_ssync(VBERROR_EC_REBOOT_TO_RO_REQUIRED,
VBNV_RECOVERY_EC_EXPECTED_IMAGE, "Can't fetch image");
/* Updates required */
ResetMocks();
mock_in_rw = 1;
want_ec_hash[0]++;
test_ssync(VBERROR_EC_REBOOT_TO_RO_REQUIRED,
VBNV_RECOVERY_EC_HASH_MISMATCH,
"Precalculated hash mismatch");
ResetMocks();
mock_in_rw = 1;
mock_ec_hash[0]++;
test_ssync(VBERROR_EC_REBOOT_TO_RO_REQUIRED,
0, "Pending update needs reboot");
ResetMocks();
mock_ec_hash[0]++;
test_ssync(0, 0, "Update without reboot");
TEST_EQ(ec_protected, 1, " ec protected");
TEST_EQ(ec_run_image, 1, " ec run image");
TEST_EQ(ec_updated, 1, " ec updated");
ResetMocks();
mock_ec_hash[0]++;
update_retval = VBERROR_EC_REBOOT_TO_RO_REQUIRED;
test_ssync(VBERROR_EC_REBOOT_TO_RO_REQUIRED,
0, "Reboot after update");
TEST_EQ(ec_updated, 1, " ec updated");
ResetMocks();
mock_ec_hash[0]++;
update_retval = VBERROR_SIMULATED;
test_ssync(VBERROR_EC_REBOOT_TO_RO_REQUIRED,
VBNV_RECOVERY_EC_UPDATE, "Update failed");
ResetMocks();
mock_ec_hash[0]++;
shared->flags |= VBSD_EC_SLOW_UPDATE;
test_ssync(0, 0, "Slow update");
TEST_EQ(screens_displayed[0], VB_SCREEN_WAIT, " wait screen");
/* RW cases, no update */
ResetMocks();
mock_in_rw = 1;
test_ssync(0, 0, "AP-RW, EC-RW");
ResetMocks();
test_ssync(0, 0, "AP-RW, EC-RO -> EC-RW");
TEST_EQ(ec_protected, 1, " ec protected");
TEST_EQ(ec_run_image, 1, " ec run image");
TEST_EQ(ec_updated, 0, " ec updated");
ResetMocks();
run_retval = VBERROR_SIMULATED;
test_ssync(VBERROR_EC_REBOOT_TO_RO_REQUIRED,
VBNV_RECOVERY_EC_JUMP_RW, "Jump to RW fail");
ResetMocks();
protect_retval = VBERROR_SIMULATED;
test_ssync(VBERROR_SIMULATED,
VBNV_RECOVERY_EC_PROTECT, "Protect error");
}
int main(void)
{
VbSoftwareSyncTest();
return gTestSuccess ? 0 : 255;
}

241
tests/vboot_api_kernel4_tests.c Normal file
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@@ -0,0 +1,241 @@
/* Copyright (c) 2013 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.
*
* Tests for vboot_api_kernel, part 4 - select and load kernel
*/
#include <stdio.h>
#include <stdlib.h>
#include "gbb_header.h"
#include "host_common.h"
#include "load_kernel_fw.h"
#include "rollback_index.h"
#include "test_common.h"
#include "vboot_audio.h"
#include "vboot_common.h"
#include "vboot_kernel.h"
#include "vboot_nvstorage.h"
#include "vboot_struct.h"
/* Mock data */
static VbCommonParams cparams;
static VbSelectAndLoadKernelParams kparams;
static VbNvContext vnc;
static uint8_t shared_data[VB_SHARED_DATA_MIN_SIZE];
static VbSharedDataHeader *shared = (VbSharedDataHeader *)shared_data;
static GoogleBinaryBlockHeader gbb;
static int ecsync_retval;
static uint32_t rkr_version;
static uint32_t new_version;
static int rkr_retval, rkw_retval, rkl_retval;
static VbError_t vbboot_retval;
/* Reset mock data (for use before each test) */
static void ResetMocks(void)
{
Memset(&cparams, 0, sizeof(cparams));
cparams.shared_data_size = sizeof(shared_data);
cparams.shared_data_blob = shared_data;
cparams.gbb_data = &gbb;
Memset(&kparams, 0, sizeof(kparams));
Memset(&gbb, 0, sizeof(gbb));
gbb.major_version = GBB_MAJOR_VER;
gbb.minor_version = GBB_MINOR_VER;
gbb.flags = 0;
Memset(&vnc, 0, sizeof(vnc));
VbNvSetup(&vnc);
VbNvTeardown(&vnc); /* So CRC gets generated */
Memset(&shared_data, 0, sizeof(shared_data));
VbSharedDataInit(shared, sizeof(shared_data));
ecsync_retval = VBERROR_SUCCESS;
rkr_version = new_version = 0x10002;
rkr_retval = rkw_retval = rkl_retval = VBERROR_SUCCESS;
vbboot_retval = VBERROR_SUCCESS;
}
/* Mock functions */
VbError_t VbExNvStorageRead(uint8_t *buf)
{
Memcpy(buf, vnc.raw, sizeof(vnc.raw));
return VBERROR_SUCCESS;
}
VbError_t VbExNvStorageWrite(const uint8_t *buf)
{
Memcpy(vnc.raw, buf, sizeof(vnc.raw));
return VBERROR_SUCCESS;
}
VbError_t VbEcSoftwareSync(VbCommonParams *cparams)
{
return ecsync_retval;
}
uint32_t RollbackKernelRead(uint32_t *version)
{
*version = rkr_version;
return rkr_retval;
}
uint32_t RollbackKernelWrite(uint32_t version)
{
TEST_EQ(version, new_version, "RollbackKernelWrite new version");
rkr_version = version;
return rkw_retval;
}
uint32_t RollbackKernelLock(void)
{
return rkl_retval;
}
VbError_t VbBootNormal(VbCommonParams *cparams, LoadKernelParams *p)
{
shared->kernel_version_tpm = new_version;
if (vbboot_retval == -1)
return VBERROR_SIMULATED;
return vbboot_retval;
}
VbError_t VbBootDeveloper(VbCommonParams *cparams, LoadKernelParams *p)
{
shared->kernel_version_tpm = new_version;
if (vbboot_retval == -2)
return VBERROR_SIMULATED;
return vbboot_retval;
}
VbError_t VbBootRecovery(VbCommonParams *cparams, LoadKernelParams *p)
{
shared->kernel_version_tpm = new_version;
if (vbboot_retval == -3)
return VBERROR_SIMULATED;
return vbboot_retval;
}
static void test_slk(VbError_t retval, int recovery_reason, const char *desc)
{
uint32_t u;
TEST_EQ(VbSelectAndLoadKernel(&cparams, &kparams), retval, desc);
VbNvGet(&vnc, VBNV_RECOVERY_REQUEST, &u);
TEST_EQ(u, recovery_reason, " recovery reason");
}
/* Tests */
static void VbSlkTest(void)
{
ResetMocks();
test_slk(0, 0, "Normal");
/* Software sync */
ResetMocks();
shared->flags |= VBSD_EC_SOFTWARE_SYNC;
ecsync_retval = VBERROR_SIMULATED;
test_slk(VBERROR_SIMULATED, 0, "EC sync bad");
ResetMocks();
ecsync_retval = VBERROR_SIMULATED;
test_slk(0, 0, "EC sync not done");
/* Rollback kernel version */
ResetMocks();
rkr_retval = 123;
test_slk(VBERROR_TPM_READ_KERNEL,
VBNV_RECOVERY_RW_TPM_R_ERROR, "Read kernel rollback");
ResetMocks();
new_version = 0x20003;
test_slk(0, 0, "Roll forward");
TEST_EQ(rkr_version, 0x20003, " version");
ResetMocks();
new_version = 0x20003;
shared->flags |= VBSD_FWB_TRIED;
shared->firmware_index = 1;
test_slk(0, 0, "Don't roll forward during try B");
TEST_EQ(rkr_version, 0x10002, " version");
ResetMocks();
vbboot_retval = VBERROR_INVALID_KERNEL_FOUND;
VbNvSet(&vnc, VBNV_RECOVERY_REQUEST, 123);
VbNvTeardown(&vnc);
shared->flags |= VBSD_FWB_TRIED;
shared->firmware_index = 1;
test_slk(VBERROR_INVALID_KERNEL_FOUND,
0, "Don't go to recovery if try b fails to find a kernel");
ResetMocks();
new_version = 0x20003;
rkw_retval = 123;
test_slk(VBERROR_TPM_WRITE_KERNEL,
VBNV_RECOVERY_RW_TPM_W_ERROR, "Write kernel rollback");
ResetMocks();
rkl_retval = 123;
test_slk(VBERROR_TPM_LOCK_KERNEL,
VBNV_RECOVERY_RW_TPM_L_ERROR, "Lock kernel rollback");
/* Boot normal */
ResetMocks();
vbboot_retval = -1;
test_slk(VBERROR_SIMULATED, 0, "Normal boot bad");
/* Boot dev */
ResetMocks();
shared->flags |= VBSD_BOOT_DEV_SWITCH_ON;
vbboot_retval = -2;
test_slk(VBERROR_SIMULATED, 0, "Dev boot bad");
ResetMocks();
shared->flags |= VBSD_BOOT_DEV_SWITCH_ON;
new_version = 0x20003;
test_slk(0, 0, "Dev doesn't roll forward");
TEST_EQ(rkr_version, 0x10002, " version");
/* Boot recovery */
ResetMocks();
shared->recovery_reason = 123;
vbboot_retval = -3;
test_slk(VBERROR_SIMULATED, 0, "Recovery boot bad");
ResetMocks();
shared->recovery_reason = 123;
new_version = 0x20003;
test_slk(0, 0, "Recovery doesn't roll forward");
TEST_EQ(rkr_version, 0x10002, " version");
ResetMocks();
shared->recovery_reason = 123;
rkr_retval = rkw_retval = rkl_retval = VBERROR_SIMULATED;
test_slk(0, 0, "Recovery ignore TPM errors");
// todo: rkr/w/l fail ignored if recovery
}
int main(void)
{
VbSlkTest();
return gTestSuccess ? 0 : 255;
}

6
tests/vboot_api_kernel_tests.c
View File

@@ -15,7 +15,7 @@
#include "test_common.h"
#include "utility.h"
#include "vboot_api.h"
#include "vboot_kernel.h"
#define MAX_TEST_DISKS 10
#define DEFAULT_COUNT -1
@@ -286,10 +286,6 @@ int VbNvSet(VbNvContext *context, VbNvParam param, uint32_t value)
/****************************************************************************/
/* This is not declared in any headers, so declare it here. */
uint32_t VbTryLoadKernel(VbCommonParams *cparams, LoadKernelParams *p,
uint32_t get_info_flags);
static void VbTryLoadKernelTest(void)
{
int i;