efi_selftest: provide initrddump test tool
Provide an UEFI application to save the initial RAM disk provided by U-Boot via the Load File2 protocol. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Heinrich Schuchardt
parent
8644af7dc4
commit
65ab48d69d
|
|
@ -14,6 +14,8 @@ CFLAGS_efi_selftest_miniapp_exit.o := $(CFLAGS_EFI) -Os -ffreestanding
|
|||
CFLAGS_REMOVE_efi_selftest_miniapp_exit.o := $(CFLAGS_NON_EFI)
|
||||
CFLAGS_efi_selftest_miniapp_return.o := $(CFLAGS_EFI) -Os -ffreestanding
|
||||
CFLAGS_REMOVE_efi_selftest_miniapp_return.o := $(CFLAGS_NON_EFI)
|
||||
CFLAGS_initrddump_exit.o := $(CFLAGS_EFI) -Os -ffreestanding
|
||||
CFLAGS_REMOVE_initrddump.o := $(CFLAGS_NON_EFI)
|
||||
|
||||
obj-y += \
|
||||
efi_selftest.o \
|
||||
|
|
@ -82,6 +84,10 @@ ifeq ($(CONFIG_GENERATE_ACPI_TABLE),)
|
|||
always += dtbdump.efi
|
||||
endif
|
||||
|
||||
ifdef CONFIG_EFI_LOAD_FILE2_INITRD
|
||||
always += initrddump.efi
|
||||
endif
|
||||
|
||||
$(obj)/efi_miniapp_file_image_exception.h: $(obj)/efi_selftest_miniapp_exception.efi
|
||||
$(obj)/../../tools/file2include $(obj)/efi_selftest_miniapp_exception.efi > \
|
||||
$(obj)/efi_miniapp_file_image_exception.h
|
||||
|
|
|
|||
|
|
@ -46,11 +46,10 @@ static void mac(void *pointer, u16 **buf)
|
|||
/*
|
||||
* printx() - print hexadecimal number to an u16 string
|
||||
*
|
||||
* @pointer: pointer
|
||||
* @p: value to print
|
||||
* @prec: minimum number of digits to print
|
||||
* @buf: pointer to buffer address,
|
||||
* on return position of terminating zero word
|
||||
* @size: size of value to be printed in bytes
|
||||
*/
|
||||
static void printx(u64 p, int prec, u16 **buf)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -0,0 +1,449 @@
|
|||
// SPDX-License-Identifier: GPL-2.0+
|
||||
/*
|
||||
* Copyright 2020, Heinrich Schuchardt <xypron.glpk@gmx.de>
|
||||
*
|
||||
* initrddump.efi saves the initial RAM disk provided via the
|
||||
* EFI_LOAD_FILE2_PROTOCOL.
|
||||
*/
|
||||
|
||||
#include <common.h>
|
||||
#include <efi_api.h>
|
||||
#include <efi_load_initrd.h>
|
||||
|
||||
#define BUFFER_SIZE 64
|
||||
#define ESC 0x17
|
||||
|
||||
#define efi_size_in_pages(size) (((size) + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT)
|
||||
|
||||
static struct efi_system_table *systable;
|
||||
static struct efi_boot_services *bs;
|
||||
static struct efi_simple_text_output_protocol *cerr;
|
||||
static struct efi_simple_text_output_protocol *cout;
|
||||
static struct efi_simple_text_input_protocol *cin;
|
||||
static const efi_guid_t loaded_image_guid = EFI_LOADED_IMAGE_PROTOCOL_GUID;
|
||||
static const efi_guid_t guid_simple_file_system_protocol =
|
||||
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID;
|
||||
static const efi_guid_t load_file2_guid = EFI_LOAD_FILE2_PROTOCOL_GUID;
|
||||
static efi_handle_t handle;
|
||||
|
||||
/*
|
||||
* Device path defined by Linux to identify the handle providing the
|
||||
* EFI_LOAD_FILE2_PROTOCOL used for loading the initial ramdisk.
|
||||
*/
|
||||
static const struct efi_initrd_dp initrd_dp = {
|
||||
.vendor = {
|
||||
{
|
||||
DEVICE_PATH_TYPE_MEDIA_DEVICE,
|
||||
DEVICE_PATH_SUB_TYPE_VENDOR_PATH,
|
||||
sizeof(initrd_dp.vendor),
|
||||
},
|
||||
EFI_INITRD_MEDIA_GUID,
|
||||
},
|
||||
.end = {
|
||||
DEVICE_PATH_TYPE_END,
|
||||
DEVICE_PATH_SUB_TYPE_END,
|
||||
sizeof(initrd_dp.end),
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* print() - print string
|
||||
*
|
||||
* @string: text
|
||||
*/
|
||||
static void print(u16 *string)
|
||||
{
|
||||
cout->output_string(cout, string);
|
||||
}
|
||||
|
||||
/**
|
||||
* error() - print error string
|
||||
*
|
||||
* @string: error text
|
||||
*/
|
||||
static void error(u16 *string)
|
||||
{
|
||||
cout->set_attribute(cout, EFI_LIGHTRED | EFI_BACKGROUND_BLACK);
|
||||
print(string);
|
||||
cout->set_attribute(cout, EFI_LIGHTBLUE | EFI_BACKGROUND_BLACK);
|
||||
}
|
||||
|
||||
/*
|
||||
* printx() - print hexadecimal number
|
||||
*
|
||||
* @val: value to print;
|
||||
* @prec: minimum number of digits to print
|
||||
*/
|
||||
static void printx(u64 val, u32 prec)
|
||||
{
|
||||
int i;
|
||||
u16 c;
|
||||
u16 buf[16];
|
||||
u16 *pos = buf;
|
||||
|
||||
for (i = 2 * sizeof(val) - 1; i >= 0; --i) {
|
||||
c = (val >> (4 * i)) & 0x0f;
|
||||
if (c || pos != buf || !i || i < prec) {
|
||||
c += '0';
|
||||
if (c > '9')
|
||||
c += 'a' - '9' - 1;
|
||||
*pos++ = c;
|
||||
}
|
||||
}
|
||||
*pos = 0;
|
||||
print(buf);
|
||||
}
|
||||
|
||||
/**
|
||||
* efi_input_yn() - get answer to yes/no question
|
||||
*
|
||||
* Return:
|
||||
* y or Y
|
||||
* EFI_SUCCESS
|
||||
* n or N
|
||||
* EFI_ACCESS_DENIED
|
||||
* ESC
|
||||
* EFI_ABORTED
|
||||
*/
|
||||
static efi_status_t efi_input_yn(void)
|
||||
{
|
||||
struct efi_input_key key = {0};
|
||||
efi_uintn_t index;
|
||||
efi_status_t ret;
|
||||
|
||||
/* Drain the console input */
|
||||
ret = cin->reset(cin, true);
|
||||
for (;;) {
|
||||
ret = bs->wait_for_event(1, &cin->wait_for_key, &index);
|
||||
if (ret != EFI_SUCCESS)
|
||||
continue;
|
||||
ret = cin->read_key_stroke(cin, &key);
|
||||
if (ret != EFI_SUCCESS)
|
||||
continue;
|
||||
switch (key.scan_code) {
|
||||
case 0x17: /* Escape */
|
||||
return EFI_ABORTED;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
/* Convert to lower case */
|
||||
switch (key.unicode_char | 0x20) {
|
||||
case 'y':
|
||||
return EFI_SUCCESS;
|
||||
case 'n':
|
||||
return EFI_ACCESS_DENIED;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* efi_input() - read string from console
|
||||
*
|
||||
* @buffer: input buffer
|
||||
* @buffer_size: buffer size
|
||||
* Return: status code
|
||||
*/
|
||||
static efi_status_t efi_input(u16 *buffer, efi_uintn_t buffer_size)
|
||||
{
|
||||
struct efi_input_key key = {0};
|
||||
efi_uintn_t index;
|
||||
efi_uintn_t pos = 0;
|
||||
u16 outbuf[2] = L" ";
|
||||
efi_status_t ret;
|
||||
|
||||
/* Drain the console input */
|
||||
ret = cin->reset(cin, true);
|
||||
*buffer = 0;
|
||||
for (;;) {
|
||||
ret = bs->wait_for_event(1, &cin->wait_for_key, &index);
|
||||
if (ret != EFI_SUCCESS)
|
||||
continue;
|
||||
ret = cin->read_key_stroke(cin, &key);
|
||||
if (ret != EFI_SUCCESS)
|
||||
continue;
|
||||
switch (key.scan_code) {
|
||||
case 0x17: /* Escape */
|
||||
print(L"\r\nAborted\r\n");
|
||||
return EFI_ABORTED;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
switch (key.unicode_char) {
|
||||
case 0x08: /* Backspace */
|
||||
if (pos) {
|
||||
buffer[pos--] = 0;
|
||||
print(L"\b \b");
|
||||
}
|
||||
break;
|
||||
case 0x0a: /* Linefeed */
|
||||
case 0x0d: /* Carriage return */
|
||||
print(L"\r\n");
|
||||
return EFI_SUCCESS;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
/* Ignore surrogate codes */
|
||||
if (key.unicode_char >= 0xD800 && key.unicode_char <= 0xDBFF)
|
||||
continue;
|
||||
if (key.unicode_char >= 0x20 &&
|
||||
pos < buffer_size - 1) {
|
||||
*outbuf = key.unicode_char;
|
||||
buffer[pos++] = key.unicode_char;
|
||||
buffer[pos] = 0;
|
||||
print(outbuf);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* skip_whitespace() - skip over leading whitespace
|
||||
*
|
||||
* @pos: UTF-16 string
|
||||
* Return: pointer to first non-whitespace
|
||||
*/
|
||||
static u16 *skip_whitespace(u16 *pos)
|
||||
{
|
||||
for (; *pos && *pos <= 0x20; ++pos)
|
||||
;
|
||||
return pos;
|
||||
}
|
||||
|
||||
/**
|
||||
* starts_with() - check if @string starts with @keyword
|
||||
*
|
||||
* @string: string to search for keyword
|
||||
* @keyword: keyword to be searched
|
||||
* Return: true fi @string starts with the keyword
|
||||
*/
|
||||
static bool starts_with(u16 *string, u16 *keyword)
|
||||
{
|
||||
for (; *keyword; ++string, ++keyword) {
|
||||
if (*string != *keyword)
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* do_help() - print help
|
||||
*/
|
||||
static void do_help(void)
|
||||
{
|
||||
error(L"load - show length and CRC32 of initial RAM disk\r\n");
|
||||
error(L"save <initrd> - save initial RAM disk to file\r\n");
|
||||
error(L"exit - exit the shell\r\n");
|
||||
}
|
||||
|
||||
/**
|
||||
* get_initrd() - read initial RAM disk via EFI_LOAD_FILE2_PROTOCOL
|
||||
*
|
||||
* @initrd: on return buffer with initial RAM disk
|
||||
* @initrd_size: size of initial RAM disk
|
||||
* Return: status code
|
||||
*/
|
||||
static efi_status_t get_initrd(void **initrd, efi_uintn_t *initrd_size)
|
||||
{
|
||||
struct efi_device_path *dp = (struct efi_device_path *)&initrd_dp;
|
||||
struct efi_load_file_protocol *load_file2_prot;
|
||||
u64 buffer;
|
||||
efi_handle_t handle;
|
||||
efi_status_t ret;
|
||||
|
||||
*initrd = NULL;
|
||||
*initrd_size = 0;
|
||||
ret = bs->locate_device_path(&load_file2_guid, &dp, &handle);
|
||||
if (ret != EFI_SUCCESS) {
|
||||
error(L"Load File2 protocol not found\r\n");
|
||||
return ret;
|
||||
}
|
||||
ret = bs->handle_protocol(handle, &load_file2_guid,
|
||||
(void **)&load_file2_prot);
|
||||
ret = load_file2_prot->load_file(load_file2_prot, dp, false,
|
||||
initrd_size, NULL);
|
||||
if (ret != EFI_BUFFER_TOO_SMALL) {
|
||||
error(L"Load File2 protocol does not provide file length\r\n");
|
||||
return EFI_LOAD_ERROR;
|
||||
}
|
||||
ret = bs->allocate_pages(EFI_ALLOCATE_ANY_PAGES, EFI_LOADER_DATA,
|
||||
efi_size_in_pages(*initrd_size), &buffer);
|
||||
if (ret != EFI_SUCCESS) {
|
||||
error(L"Out of memory\r\n");
|
||||
return ret;
|
||||
}
|
||||
*initrd = (void *)buffer;
|
||||
ret = load_file2_prot->load_file(load_file2_prot, dp, false,
|
||||
initrd_size, *initrd);
|
||||
if (ret != EFI_SUCCESS) {
|
||||
error(L"Load File2 protocol failed to provide file\r\n");
|
||||
bs->free_pages(buffer, efi_size_in_pages(*initrd_size));
|
||||
return EFI_LOAD_ERROR;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* do_load() - load initial RAM disk and display CRC32 and length
|
||||
*
|
||||
* @filename: file name
|
||||
* Return: status code
|
||||
*/
|
||||
static efi_status_t do_load(void)
|
||||
{
|
||||
void *initrd;
|
||||
efi_uintn_t initrd_size;
|
||||
u32 crc32;
|
||||
efi_uintn_t ret;
|
||||
|
||||
ret = get_initrd(&initrd, &initrd_size);
|
||||
if (ret != EFI_SUCCESS)
|
||||
return ret;
|
||||
print(L"length: 0x");
|
||||
printx(initrd_size, 1);
|
||||
print(L"\r\n");
|
||||
|
||||
ret = bs->calculate_crc32(initrd, initrd_size, &crc32);
|
||||
if (ret != EFI_SUCCESS) {
|
||||
error(L"Calculating CRC32 failed\r\n");
|
||||
return EFI_LOAD_ERROR;
|
||||
}
|
||||
print(L"crc32: 0x");
|
||||
printx(crc32, 8);
|
||||
print(L"\r\n");
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
* do_save() - save initial RAM disk
|
||||
*
|
||||
* @filename: file name
|
||||
* Return: status code
|
||||
*/
|
||||
static efi_status_t do_save(u16 *filename)
|
||||
{
|
||||
struct efi_loaded_image *loaded_image;
|
||||
struct efi_simple_file_system_protocol *file_system;
|
||||
struct efi_file_handle *root, *file;
|
||||
void *initrd;
|
||||
efi_uintn_t initrd_size;
|
||||
efi_uintn_t ret;
|
||||
|
||||
ret = get_initrd(&initrd, &initrd_size);
|
||||
if (ret != EFI_SUCCESS)
|
||||
return ret;
|
||||
|
||||
filename = skip_whitespace(filename);
|
||||
|
||||
ret = bs->open_protocol(handle, &loaded_image_guid,
|
||||
(void **)&loaded_image, NULL, NULL,
|
||||
EFI_OPEN_PROTOCOL_GET_PROTOCOL);
|
||||
if (ret != EFI_SUCCESS) {
|
||||
error(L"Loaded image protocol not found\r\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Open the simple file system protocol */
|
||||
ret = bs->open_protocol(loaded_image->device_handle,
|
||||
&guid_simple_file_system_protocol,
|
||||
(void **)&file_system, NULL, NULL,
|
||||
EFI_OPEN_PROTOCOL_GET_PROTOCOL);
|
||||
if (ret != EFI_SUCCESS) {
|
||||
error(L"Failed to open simple file system protocol\r\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Open volume */
|
||||
ret = file_system->open_volume(file_system, &root);
|
||||
if (ret != EFI_SUCCESS) {
|
||||
error(L"Failed to open volume\r\n");
|
||||
goto out;
|
||||
}
|
||||
/* Check if file already exists */
|
||||
ret = root->open(root, &file, filename, EFI_FILE_MODE_READ, 0);
|
||||
if (ret == EFI_SUCCESS) {
|
||||
file->close(file);
|
||||
print(L"Overwrite existing file (y/n)? ");
|
||||
ret = efi_input_yn();
|
||||
print(L"\r\n");
|
||||
if (ret != EFI_SUCCESS) {
|
||||
root->close(root);
|
||||
error(L"Aborted by user\r\n");
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
/* Create file */
|
||||
ret = root->open(root, &file, filename,
|
||||
EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE |
|
||||
EFI_FILE_MODE_CREATE, EFI_FILE_ARCHIVE);
|
||||
if (ret == EFI_SUCCESS) {
|
||||
/* Write file */
|
||||
ret = file->write(file, &initrd_size, initrd);
|
||||
if (ret != EFI_SUCCESS) {
|
||||
error(L"Failed to write file\r\n");
|
||||
} else {
|
||||
print(filename);
|
||||
print(L" written\r\n");
|
||||
}
|
||||
file->close(file);
|
||||
} else {
|
||||
error(L"Failed to open file\r\n");
|
||||
}
|
||||
root->close(root);
|
||||
|
||||
out:
|
||||
if (initrd)
|
||||
bs->free_pages((uintptr_t)initrd,
|
||||
efi_size_in_pages(initrd_size));
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* efi_main() - entry point of the EFI application.
|
||||
*
|
||||
* @handle: handle of the loaded image
|
||||
* @systab: system table
|
||||
* @return: status code
|
||||
*/
|
||||
efi_status_t EFIAPI efi_main(efi_handle_t image_handle,
|
||||
struct efi_system_table *systab)
|
||||
{
|
||||
handle = image_handle;
|
||||
systable = systab;
|
||||
cerr = systable->std_err;
|
||||
cout = systable->con_out;
|
||||
cin = systable->con_in;
|
||||
bs = systable->boottime;
|
||||
|
||||
cout->set_attribute(cout, EFI_LIGHTBLUE | EFI_BACKGROUND_BLACK);
|
||||
cout->clear_screen(cout);
|
||||
cout->set_attribute(cout, EFI_WHITE | EFI_BACKGROUND_BLACK);
|
||||
print(L"INITRD Dump\r\n========\r\n\r\n");
|
||||
cout->set_attribute(cout, EFI_LIGHTBLUE | EFI_BACKGROUND_BLACK);
|
||||
|
||||
for (;;) {
|
||||
u16 command[BUFFER_SIZE];
|
||||
u16 *pos;
|
||||
efi_uintn_t ret;
|
||||
|
||||
print(L"=> ");
|
||||
ret = efi_input(command, sizeof(command));
|
||||
if (ret == EFI_ABORTED)
|
||||
break;
|
||||
pos = skip_whitespace(command);
|
||||
if (starts_with(pos, L"exit"))
|
||||
break;
|
||||
else if (starts_with(pos, L"load"))
|
||||
do_load();
|
||||
else if (starts_with(pos, L"save "))
|
||||
do_save(pos + 5);
|
||||
else
|
||||
do_help();
|
||||
}
|
||||
|
||||
cout->set_attribute(cout, EFI_LIGHTGRAY | EFI_BACKGROUND_BLACK);
|
||||
cout->clear_screen(cout);
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
Loading…
Reference in New Issue