105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
/* ----------------------------------------------------------------------- *
|
|
*
|
|
* Copyright (C) 2009 Intel Corporation. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License version
|
|
* 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
* 02110-1301, USA.
|
|
*
|
|
* H. Peter Anvin <hpa@linux.intel.com>
|
|
*
|
|
* ----------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Compute the desired load offset from a compressed program; outputs
|
|
* a small assembly wrapper with the appropriate symbols defined.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <inttypes.h>
|
|
#include <tools/le_byteshift.h>
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
uint32_t olen;
|
|
long ilen;
|
|
unsigned long offs;
|
|
unsigned long run_size;
|
|
FILE *f = NULL;
|
|
int retval = 1;
|
|
|
|
if (argc < 3) {
|
|
fprintf(stderr, "Usage: %s compressed_file run_size\n",
|
|
argv[0]);
|
|
goto bail;
|
|
}
|
|
|
|
/* Get the information for the compressed kernel image first */
|
|
|
|
f = fopen(argv[1], "r");
|
|
if (!f) {
|
|
perror(argv[1]);
|
|
goto bail;
|
|
}
|
|
|
|
|
|
if (fseek(f, -4L, SEEK_END)) {
|
|
perror(argv[1]);
|
|
}
|
|
|
|
if (fread(&olen, sizeof(olen), 1, f) != 1) {
|
|
perror(argv[1]);
|
|
goto bail;
|
|
}
|
|
|
|
ilen = ftell(f);
|
|
olen = get_unaligned_le32(&olen);
|
|
|
|
/*
|
|
* Now we have the input (compressed) and output (uncompressed)
|
|
* sizes, compute the necessary decompression offset...
|
|
*/
|
|
|
|
offs = (olen > ilen) ? olen - ilen : 0;
|
|
offs += olen >> 12; /* Add 8 bytes for each 32K block */
|
|
offs += 64*1024 + 128; /* Add 64K + 128 bytes slack */
|
|
offs = (offs+4095) & ~4095; /* Round to a 4K boundary */
|
|
run_size = atoi(argv[2]);
|
|
|
|
printf(".section \".rodata..compressed\",\"a\",@progbits\n");
|
|
printf(".globl z_input_len\n");
|
|
printf("z_input_len = %lu\n", ilen);
|
|
printf(".globl z_output_len\n");
|
|
printf("z_output_len = %lu\n", (unsigned long)olen);
|
|
printf(".globl z_extract_offset\n");
|
|
printf("z_extract_offset = 0x%lx\n", offs);
|
|
/* z_extract_offset_negative allows simplification of head_32.S */
|
|
printf(".globl z_extract_offset_negative\n");
|
|
printf("z_extract_offset_negative = -0x%lx\n", offs);
|
|
printf(".globl z_run_size\n");
|
|
printf("z_run_size = %lu\n", run_size);
|
|
|
|
printf(".globl input_data, input_data_end\n");
|
|
printf("input_data:\n");
|
|
printf(".incbin \"%s\"\n", argv[1]);
|
|
printf("input_data_end:\n");
|
|
|
|
retval = 0;
|
|
bail:
|
|
if (f)
|
|
fclose(f);
|
|
return retval;
|
|
}
|