mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-28 15:41:40 +00:00
3ff4675d73
In file included from include/linux/bitops.h:22,
from include/log.h:15,
from include/linux/printk.h:4,
from include/common.h:20,
from lib/lz4_wrapper.c:6:
lib/lz4_wrapper.c: In function ‘ulz4fn’:
include/linux/kernel.h:184:17: warning: comparison of distinct pointer types lacks a cast
(void) (&_min1 == &_min2); \
^~
lib/lz4_wrapper.c:104:18: note: in expansion of macro ‘min’
size_t size = min((ptrdiff_t)block_size, end - out);
^~~
Signed-off-by: Pali Rohár <pali@kernel.org>
109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL 2.0+ OR BSD-3-Clause
|
|
/*
|
|
* Copyright 2015 Google Inc.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <compiler.h>
|
|
#include <image.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <asm/unaligned.h>
|
|
#include <u-boot/lz4.h>
|
|
|
|
/* lz4.c is unaltered (except removing unrelated code) from github.com/Cyan4973/lz4. */
|
|
#include "lz4.c" /* #include for inlining, do not link! */
|
|
|
|
#define LZ4F_BLOCKUNCOMPRESSED_FLAG 0x80000000U
|
|
|
|
int ulz4fn(const void *src, size_t srcn, void *dst, size_t *dstn)
|
|
{
|
|
const void *end = dst + *dstn;
|
|
const void *in = src;
|
|
void *out = dst;
|
|
int has_block_checksum;
|
|
int ret;
|
|
*dstn = 0;
|
|
|
|
{ /* With in-place decompression the header may become invalid later. */
|
|
u32 magic;
|
|
u8 flags, version, independent_blocks, has_content_size;
|
|
u8 block_desc;
|
|
|
|
if (srcn < sizeof(u32) + 3*sizeof(u8))
|
|
return -EINVAL; /* input overrun */
|
|
|
|
magic = get_unaligned_le32(in);
|
|
in += sizeof(u32);
|
|
flags = *(u8 *)in;
|
|
in += sizeof(u8);
|
|
block_desc = *(u8 *)in;
|
|
in += sizeof(u8);
|
|
|
|
version = (flags >> 6) & 0x3;
|
|
independent_blocks = (flags >> 5) & 0x1;
|
|
has_block_checksum = (flags >> 4) & 0x1;
|
|
has_content_size = (flags >> 3) & 0x1;
|
|
|
|
/* We assume there's always only a single, standard frame. */
|
|
if (magic != LZ4F_MAGIC || version != 1)
|
|
return -EPROTONOSUPPORT; /* unknown format */
|
|
if ((flags & 0x03) || (block_desc & 0x8f))
|
|
return -EINVAL; /* reserved bits must be zero */
|
|
if (!independent_blocks)
|
|
return -EPROTONOSUPPORT; /* we can't support this yet */
|
|
|
|
if (has_content_size) {
|
|
if (srcn < sizeof(u32) + 3*sizeof(u8) + sizeof(u64))
|
|
return -EINVAL; /* input overrun */
|
|
in += sizeof(u64);
|
|
}
|
|
/* Header checksum byte */
|
|
in += sizeof(u8);
|
|
}
|
|
|
|
while (1) {
|
|
u32 block_header, block_size;
|
|
|
|
block_header = get_unaligned_le32(in);
|
|
in += sizeof(u32);
|
|
block_size = block_header & ~LZ4F_BLOCKUNCOMPRESSED_FLAG;
|
|
|
|
if (in - src + block_size > srcn) {
|
|
ret = -EINVAL; /* input overrun */
|
|
break;
|
|
}
|
|
|
|
if (!block_size) {
|
|
ret = 0; /* decompression successful */
|
|
break;
|
|
}
|
|
|
|
if (block_header & LZ4F_BLOCKUNCOMPRESSED_FLAG) {
|
|
size_t size = min((ptrdiff_t)block_size, (ptrdiff_t)(end - out));
|
|
memcpy(out, in, size);
|
|
out += size;
|
|
if (size < block_size) {
|
|
ret = -ENOBUFS; /* output overrun */
|
|
break;
|
|
}
|
|
} else {
|
|
/* constant folding essential, do not touch params! */
|
|
ret = LZ4_decompress_generic(in, out, block_size,
|
|
end - out, endOnInputSize,
|
|
decode_full_block, noDict, out, NULL, 0);
|
|
if (ret < 0) {
|
|
ret = -EPROTO; /* decompression error */
|
|
break;
|
|
}
|
|
out += ret;
|
|
}
|
|
|
|
in += block_size;
|
|
if (has_block_checksum)
|
|
in += sizeof(u32);
|
|
}
|
|
|
|
*dstn = out - dst;
|
|
return ret;
|
|
}
|