2008-05-07 22:34:02 +02:00
|
|
|
/*
|
|
|
|
* This file is part of the libpayload project.
|
|
|
|
*
|
|
|
|
* Copyright (C) 2008 Advanced Micro Devices, 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.h>
|
|
|
|
#include <arch/endian.h>
|
|
|
|
|
|
|
|
#define ROM_RESET_VECTOR 0xFFFFFFF0
|
|
|
|
|
|
|
|
static void * next_header(void * cur)
|
|
|
|
{
|
|
|
|
struct lar_header *header = (struct lar_header *) cur;
|
|
|
|
int offset = ((ntohl(header->offset) + ntohl(header->len)) + 15) &
|
|
|
|
0xFFFFFFF0;
|
|
|
|
|
|
|
|
return (void *) (cur + offset);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct lar_header *lar_get_header(struct LAR *lar, int index)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (index < lar->count)
|
|
|
|
return (struct lar_header *) lar->headers[index];
|
|
|
|
|
|
|
|
if (lar->eof && index >= lar->eof)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
for(i = lar->count; i <= index; i++) {
|
|
|
|
void *next = (i == 0) ?
|
|
|
|
lar->start : next_header(lar->headers[i - 1]);
|
|
|
|
|
|
|
|
if (strncmp((const char *) next, LAR_MAGIC, 8)) {
|
|
|
|
lar->eof = lar->count;
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (lar->count == lar->alloc) {
|
|
|
|
void *tmp = realloc(lar->headers,
|
|
|
|
(lar->alloc + 16) * sizeof(void *));
|
|
|
|
|
|
|
|
if (tmp == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
lar->headers = tmp;
|
|
|
|
lar->alloc += 16;
|
|
|
|
}
|
|
|
|
|
|
|
|
lar->headers[lar->count++] = next;
|
|
|
|
}
|
|
|
|
|
|
|
|
return (struct lar_header *) lar->headers[index];
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Open a LAR stream
|
|
|
|
*
|
|
|
|
* @param addr The address in memory where the LAR is located.
|
|
|
|
* Use NULL to specify the boot LAR
|
|
|
|
* @return a pointer to the LAR stream
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct LAR *openlar(void *addr)
|
|
|
|
{
|
|
|
|
struct LAR *lar;
|
|
|
|
|
|
|
|
/* If the address is null, then figure out the start of the
|
|
|
|
boot LAR */
|
|
|
|
|
|
|
|
if (addr == NULL) {
|
|
|
|
u32 size = *((u32 *) (ROM_RESET_VECTOR + 4));
|
|
|
|
addr = (void *) ((ROM_RESET_VECTOR + 16) - size);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Check the magic to make sure this is a LAR */
|
|
|
|
if (strncmp((const char *) addr, LAR_MAGIC, strlen(LAR_MAGIC)))
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
lar = calloc(sizeof(struct LAR), 1);
|
|
|
|
|
|
|
|
if (!lar)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
lar->start = addr;
|
|
|
|
|
|
|
|
/* Preallocate 16 slots in the cache - this saves wear and
|
|
|
|
* tear on the heap */
|
|
|
|
|
|
|
|
lar->headers = malloc(16 * sizeof(void *));
|
2009-07-31 13:39:55 +02:00
|
|
|
|
|
|
|
if (!lar->headers)
|
|
|
|
return NULL;
|
|
|
|
|
2008-05-07 22:34:02 +02:00
|
|
|
lar->alloc = 16;
|
|
|
|
lar->count = lar->eof = 0;
|
|
|
|
lar->cindex = 0;
|
|
|
|
|
|
|
|
return lar;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Close a LAR stream
|
|
|
|
*
|
|
|
|
* @param lar A pointer to the LAR stream
|
|
|
|
* @return Return 0 on success, -1 on error
|
|
|
|
*/
|
|
|
|
|
|
|
|
int closelar(struct LAR *lar)
|
|
|
|
{
|
|
|
|
if (!lar)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (lar->headers)
|
|
|
|
free(lar->headers);
|
|
|
|
|
|
|
|
free(lar);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Read an entry from the LAR
|
|
|
|
*
|
|
|
|
* @param lar A pointer to the LAR stream
|
|
|
|
* @return A pointer to a larent structure
|
|
|
|
representing the next file in the LAR
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct larent *readlar(struct LAR *lar)
|
|
|
|
{
|
|
|
|
static struct larent _larent;
|
|
|
|
struct lar_header *header;
|
|
|
|
int nlen;
|
|
|
|
|
|
|
|
if (!lar)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
header = lar_get_header(lar, lar->cindex);
|
|
|
|
|
|
|
|
if (header == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
nlen = ntohl(header->offset) - sizeof(*header);
|
|
|
|
|
|
|
|
if (nlen > LAR_MAX_PATHLEN - 1)
|
|
|
|
nlen = LAR_MAX_PATHLEN - 1;
|
|
|
|
|
|
|
|
memcpy((void *) _larent.name, ((char *) header + sizeof(*header)),
|
|
|
|
nlen);
|
|
|
|
|
|
|
|
_larent.name[nlen] = 0;
|
|
|
|
|
|
|
|
lar->cindex++;
|
|
|
|
|
|
|
|
return (struct larent *) &_larent;
|
|
|
|
}
|
|
|
|
|
|
|
|
void rewindlar(struct LAR *lar)
|
|
|
|
{
|
|
|
|
if (lar != NULL)
|
|
|
|
lar->cindex = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct lar_header *get_header_by_name(struct LAR *lar, const char *name)
|
|
|
|
{
|
|
|
|
struct lar_header *header;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for(i = 0; ; i++) {
|
|
|
|
header = lar_get_header(lar, i);
|
|
|
|
|
|
|
|
if (header == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
if (!strcmp(name, ((char *) header + sizeof(*header))))
|
|
|
|
return header;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int larstat(struct LAR *lar, const char *path, struct larstat *buf)
|
|
|
|
{
|
|
|
|
struct lar_header *header = get_header_by_name(lar, path);
|
|
|
|
|
|
|
|
if (header == NULL || buf == NULL)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
buf->len = ntohl(header->len);
|
|
|
|
buf->reallen = ntohl(header->reallen);
|
|
|
|
buf->checksum = ntohl(header->checksum);
|
|
|
|
buf->compchecksum = ntohl(header->compchecksum);
|
|
|
|
buf->compression = ntohl(header->compression);
|
|
|
|
buf->entry = ntohll(header->entry);
|
|
|
|
buf->loadaddress = ntohll(header->loadaddress);
|
|
|
|
buf->offset = ((u32) header - (u32) lar->start) + ntohl(header->offset);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-05-20 22:09:42 +02:00
|
|
|
void * larfptr(struct LAR *lar, const char *filename)
|
|
|
|
{
|
|
|
|
struct lar_header *header = get_header_by_name(lar, filename);
|
|
|
|
|
|
|
|
if (header == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
return (void *) ((u8 *) header + ntohl(header->offset));
|
|
|
|
}
|
|
|
|
|
2008-05-27 21:57:53 +02:00
|
|
|
/**
|
|
|
|
* Verify the checksum on a particular LAR entry
|
|
|
|
*
|
|
|
|
* @param lar A pointer to the LAR stream
|
|
|
|
* @param filename The lar entry to verify
|
|
|
|
* @return Return 1 if the entry is valid, 0 if it is not, or -1
|
|
|
|
* on error
|
|
|
|
*/
|
|
|
|
|
|
|
|
int lfverify(struct LAR *lar, const char *filename)
|
|
|
|
{
|
|
|
|
struct lar_header *header = get_header_by_name(lar, filename);
|
|
|
|
|
|
|
|
u8 *ptr = (u8 *) header;
|
|
|
|
int len = ntohl(header->len) + ntohl(header->offset);
|
|
|
|
int offset;
|
|
|
|
u32 csum = 0;
|
|
|
|
|
|
|
|
if (header == NULL)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
/* The checksum needs to be calulated on entire data section,
|
|
|
|
* including any padding for the 16 byte alignment (which should
|
|
|
|
* be zeros
|
|
|
|
*/
|
|
|
|
|
|
|
|
len = (len + 15) & 0xFFFFFFF0;
|
|
|
|
|
|
|
|
for(offset = 0; offset < len; offset += 4) {
|
|
|
|
csum += *((u32 *) (ptr + offset));
|
|
|
|
}
|
|
|
|
|
|
|
|
return (csum == 0xFFFFFFFF) ? 1 : 0;
|
|
|
|
}
|
|
|
|
|
2008-05-07 22:34:02 +02:00
|
|
|
struct LFILE * lfopen(struct LAR *lar, const char *filename)
|
|
|
|
{
|
|
|
|
struct LFILE *file;
|
|
|
|
struct lar_header *header = get_header_by_name(lar, filename);
|
|
|
|
|
|
|
|
if (header == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
/* FIXME: What other validations do we want to do on the file here? */
|
|
|
|
|
|
|
|
file = malloc(sizeof(struct LFILE));
|
|
|
|
|
|
|
|
if (file == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
file->lar = lar;
|
|
|
|
file->header = header;
|
|
|
|
file->size = ntohl(header->len);
|
|
|
|
file->start = ((u8 *) header + ntohl(header->offset));
|
|
|
|
file->offset = 0;
|
|
|
|
|
|
|
|
return file;
|
|
|
|
}
|
|
|
|
|
|
|
|
void *lfmap(struct LFILE *file, int offset)
|
|
|
|
{
|
|
|
|
if (file == NULL)
|
|
|
|
return (void *) -1;
|
|
|
|
|
|
|
|
if (offset > file->size)
|
|
|
|
return (void *) -1;
|
|
|
|
|
|
|
|
return (void *) (file->start + offset);
|
|
|
|
};
|
|
|
|
|
|
|
|
int lfread(void *ptr, size_t size, size_t nmemb, struct LFILE *stream)
|
|
|
|
{
|
|
|
|
size_t tsize, actual;
|
|
|
|
size_t remain = stream->size - stream->offset;
|
|
|
|
|
|
|
|
if (!stream || !remain)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
tsize = (size * nmemb);
|
|
|
|
actual = (tsize > remain) ? remain : tsize;
|
|
|
|
|
|
|
|
memcpy(ptr, (void *) (stream->start + stream->offset), actual);
|
|
|
|
stream->offset += actual;
|
|
|
|
|
|
|
|
return actual;
|
|
|
|
}
|
|
|
|
|
|
|
|
int lfseek(struct LFILE *file, long offset, int whence)
|
|
|
|
{
|
|
|
|
int o = file->offset;
|
|
|
|
|
|
|
|
switch(whence) {
|
|
|
|
case SEEK_SET:
|
|
|
|
o = offset;
|
|
|
|
break;
|
|
|
|
case SEEK_CUR:
|
|
|
|
o += offset;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case SEEK_END:
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (o < 0 || o > file->size)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
file->offset = o;
|
|
|
|
return file->offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
int lfclose(struct LFILE *file)
|
|
|
|
{
|
|
|
|
if (file)
|
|
|
|
free(file);
|
|
|
|
return 0;
|
|
|
|
}
|