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libpayload: Implement new CBFS access API

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This commit adds new CBFS API, which is based on the one available in
the main coreboot source tree. Libpayload implementation supports RO/RW
file lookups and file contents verification.

Change-Id: I00da0658dbac0cddf92ad55611def947932d23c7
Signed-off-by: Jakub Czapiga <jacz@semihalf.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59497
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
Jakub Czapiga
2021-11-15 08:36:07 +00:00
committed by Felix Held
parent 1fa3da4d9b
commit 63e54275f6
18 changed files with 1815 additions and 437 deletions
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223
payloads/libpayload/libcbfs/cbfs_legacy.c Normal file
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/*
*
* Copyright (C) 2011 secunet Security Networks AG
* Copyright (C) 2013 Google, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <libpayload-config.h>
#if CONFIG(LP_LZMA)
# include <lzma.h>
# define CB_CBFS_CORE_WITH_LZMA
#endif
#if CONFIG(LP_LZ4)
# include <lz4.h>
# define CB_CBFS_CORE_WITH_LZ4
#endif
#include <cbfs_legacy.h>
#include <stdio.h>
#define DEBUG(x...)
#define LOG(x...)
#define ERROR(x...) printf(x)
#ifndef __SMM__
#include "cbfs_core.c"
static inline int tohex4(unsigned int c)
{
return (c <= 9) ? (c + '0') : (c - 10 + 'a');
}
static void tohex16(unsigned int val, char *dest)
{
dest[0] = tohex4(val>>12);
dest[1] = tohex4((val>>8) & 0xf);
dest[2] = tohex4((val>>4) & 0xf);
dest[3] = tohex4(val & 0xf);
}
void *cbfs_load_optionrom(struct cbfs_media *media, uint16_t vendor,
uint16_t device)
{
char name[17] = "pciXXXX,XXXX.rom";
tohex16(vendor, name+3);
tohex16(device, name+8);
return cbfs_get_file_content(media, name, CBFS_TYPE_OPTIONROM, NULL);
}
void *cbfs_load_stage(struct cbfs_media *media, const char *name)
{
struct cbfs_stage *stage = (struct cbfs_stage *)
cbfs_get_file_content(media, name, CBFS_TYPE_STAGE, NULL);
/* this is a mess. There is no ntohll. */
/* for now, assume compatible byte order until we solve this. */
uintptr_t entry;
uint32_t final_size;
if (stage == NULL)
return (void *) -1;
LOG("loading stage %s @ %p (%d bytes), entry @ 0x%llx\n", name,
(void *)(uintptr_t)stage->load, stage->memlen, stage->entry);
final_size = cbfs_decompress(stage->compression,
((unsigned char *) stage) +
sizeof(struct cbfs_stage),
stage->len,
(void *) (uintptr_t) stage->load,
stage->memlen);
if (!final_size) {
entry = -1;
goto out;
}
memset((void *)((uintptr_t)stage->load + final_size), 0,
stage->memlen - final_size);
DEBUG("stage loaded.\n");
entry = stage->entry;
// entry = ntohll(stage->entry);
out:
free(stage);
return (void *) entry;
}
int cbfs_execute_stage(struct cbfs_media *media, const char *name)
{
struct cbfs_stage *stage = (struct cbfs_stage *)
cbfs_get_file_content(media, name, CBFS_TYPE_STAGE, NULL);
if (stage == NULL)
return 1;
if (ntohl(stage->compression) != CBFS_COMPRESS_NONE) {
LOG("Unable to run %s: Compressed file"
"Not supported for in-place execution\n", name);
free(stage);
return 1;
}
LOG("run @ %p\n", (void *) (uintptr_t)ntohll(stage->entry));
int result = run_address((void *)(uintptr_t)ntohll(stage->entry));
free(stage);
return result;
}
void *cbfs_load_payload(struct cbfs_media *media, const char *name)
{
return (struct cbfs_payload *)cbfs_get_file_content(
media, name, CBFS_TYPE_SELF, NULL);
}
struct cbfs_file *cbfs_find(const char *name)
{
struct cbfs_handle *handle = cbfs_get_handle(CBFS_DEFAULT_MEDIA, name);
struct cbfs_media *m = &handle->media;
void *ret;
if (!handle)
return NULL;
ret = m->map(m, handle->media_offset,
handle->content_offset + handle->content_size);
if (ret == CBFS_MEDIA_INVALID_MAP_ADDRESS) {
free(handle);
return NULL;
}
free(handle);
return ret;
}
void *cbfs_find_file(const char *name, int type)
{
return cbfs_get_file_content(CBFS_DEFAULT_MEDIA, name, type, NULL);
}
const struct cbfs_header *get_cbfs_header(void)
{
return cbfs_get_header(CBFS_DEFAULT_MEDIA);
}
/* Simple buffer */
void *cbfs_simple_buffer_map(struct cbfs_simple_buffer *buffer, struct cbfs_media *media,
size_t offset, size_t count)
{
void *address = buffer->buffer + buffer->allocated;
DEBUG("simple_buffer_map(offset=%zu, count=%zu): "
"allocated=%zu, size=%zu, last_allocate=%zu\n",
offset, count, buffer->allocated, buffer->size,
buffer->last_allocate);
if (buffer->allocated + count >= buffer->size)
return CBFS_MEDIA_INVALID_MAP_ADDRESS;
if (media->read(media, address, offset, count) != count) {
ERROR("simple_buffer: fail to read %zd bytes from 0x%zx\n",
count, offset);
return CBFS_MEDIA_INVALID_MAP_ADDRESS;
}
buffer->allocated += count;
buffer->last_allocate = count;
return address;
}
void *cbfs_simple_buffer_unmap(struct cbfs_simple_buffer *buffer, const void *address)
{
// TODO Add simple buffer management so we can free more than last
// allocated one.
DEBUG("simple_buffer_unmap(address=%p): "
"allocated=%zu, size=%zu, last_allocate=%zu\n",
address, buffer->allocated, buffer->size,
buffer->last_allocate);
if ((buffer->buffer + buffer->allocated - buffer->last_allocate) ==
address) {
buffer->allocated -= buffer->last_allocate;
buffer->last_allocate = 0;
}
return NULL;
}
/**
* run_address is passed the address of a function taking no parameters and
* jumps to it, returning the result.
* @param f the address to call as a function.
* @return value returned by the function.
*/
int run_address(void *f)
{
int (*v)(void);
v = f;
return v();
}
#endif /* __SMM__ */