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1/* ----------------------------------------------------------------------- *
2 *
3 * Copyright (C) 2009 Intel Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License version
7 * 2 as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 *
19 * H. Peter Anvin <hpa@linux.intel.com>
20 *
21 * ----------------------------------------------------------------------- */
22
23/*
24 * Compute the desired load offset from a compressed program; outputs
25 * a small assembly wrapper with the appropriate symbols defined.
26 */
27
28#include <stdlib.h>
29#include <stdio.h>
30#include <string.h>
31#include <inttypes.h>
32#include <tools/le_byteshift.h>
33
34int main(int argc, char *argv[])
35{
36 uint32_t olen;
37 long ilen;
38 unsigned long offs;
39 FILE *f = NULL;
40 int retval = 1;
41
42 if (argc < 2) {
43 fprintf(stderr, "Usage: %s compressed_file\n", argv[0]);
44 goto bail;
45 }
46
47 /* Get the information for the compressed kernel image first */
48
49 f = fopen(argv[1], "r");
50 if (!f) {
51 perror(argv[1]);
52 goto bail;
53 }
54
55
56 if (fseek(f, -4L, SEEK_END)) {
57 perror(argv[1]);
58 }
59
60 if (fread(&olen, sizeof(olen), 1, f) != 1) {
61 perror(argv[1]);
62 goto bail;
63 }
64
65 ilen = ftell(f);
66 olen = get_unaligned_le32(&olen);
67
68 /*
69 * Now we have the input (compressed) and output (uncompressed)
70 * sizes, compute the necessary decompression offset...
71 */
72
73 offs = (olen > ilen) ? olen - ilen : 0;
74 offs += olen >> 12; /* Add 8 bytes for each 32K block */
75 offs += 64*1024 + 128; /* Add 64K + 128 bytes slack */
76 offs = (offs+4095) & ~4095; /* Round to a 4K boundary */
77
78 printf(".section \".rodata..compressed\",\"a\",@progbits\n");
79 printf(".globl z_input_len\n");
80 printf("z_input_len = %lu\n", ilen);
81 printf(".globl z_output_len\n");
82 printf("z_output_len = %lu\n", (unsigned long)olen);
83 printf(".globl z_extract_offset\n");
84 printf("z_extract_offset = 0x%lx\n", offs);
85 /* z_extract_offset_negative allows simplification of head_32.S */
86 printf(".globl z_extract_offset_negative\n");
87 printf("z_extract_offset_negative = -0x%lx\n", offs);
88
89 printf(".globl input_data, input_data_end\n");
90 printf("input_data:\n");
91 printf(".incbin \"%s\"\n", argv[1]);
92 printf("input_data_end:\n");
93
94 retval = 0;
95bail:
96 if (f)
97 fclose(f);
98 return retval;
99}
1/* ----------------------------------------------------------------------- *
2 *
3 * Copyright (C) 2009 Intel Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License version
7 * 2 as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 *
19 * H. Peter Anvin <hpa@linux.intel.com>
20 *
21 * ----------------------------------------------------------------------- */
22
23/*
24 * Compute the desired load offset from a compressed program; outputs
25 * a small assembly wrapper with the appropriate symbols defined.
26 */
27
28#include <stdlib.h>
29#include <stdio.h>
30#include <string.h>
31#include <inttypes.h>
32#include <tools/le_byteshift.h>
33
34int main(int argc, char *argv[])
35{
36 uint32_t olen;
37 long ilen;
38 unsigned long offs;
39 unsigned long run_size;
40 FILE *f = NULL;
41 int retval = 1;
42
43 if (argc < 3) {
44 fprintf(stderr, "Usage: %s compressed_file run_size\n",
45 argv[0]);
46 goto bail;
47 }
48
49 /* Get the information for the compressed kernel image first */
50
51 f = fopen(argv[1], "r");
52 if (!f) {
53 perror(argv[1]);
54 goto bail;
55 }
56
57
58 if (fseek(f, -4L, SEEK_END)) {
59 perror(argv[1]);
60 }
61
62 if (fread(&olen, sizeof(olen), 1, f) != 1) {
63 perror(argv[1]);
64 goto bail;
65 }
66
67 ilen = ftell(f);
68 olen = get_unaligned_le32(&olen);
69
70 /*
71 * Now we have the input (compressed) and output (uncompressed)
72 * sizes, compute the necessary decompression offset...
73 */
74
75 offs = (olen > ilen) ? olen - ilen : 0;
76 offs += olen >> 12; /* Add 8 bytes for each 32K block */
77 offs += 64*1024 + 128; /* Add 64K + 128 bytes slack */
78 offs = (offs+4095) & ~4095; /* Round to a 4K boundary */
79 run_size = atoi(argv[2]);
80
81 printf(".section \".rodata..compressed\",\"a\",@progbits\n");
82 printf(".globl z_input_len\n");
83 printf("z_input_len = %lu\n", ilen);
84 printf(".globl z_output_len\n");
85 printf("z_output_len = %lu\n", (unsigned long)olen);
86 printf(".globl z_extract_offset\n");
87 printf("z_extract_offset = 0x%lx\n", offs);
88 /* z_extract_offset_negative allows simplification of head_32.S */
89 printf(".globl z_extract_offset_negative\n");
90 printf("z_extract_offset_negative = -0x%lx\n", offs);
91 printf(".globl z_run_size\n");
92 printf("z_run_size = %lu\n", run_size);
93
94 printf(".globl input_data, input_data_end\n");
95 printf("input_data:\n");
96 printf(".incbin \"%s\"\n", argv[1]);
97 printf("input_data_end:\n");
98
99 retval = 0;
100bail:
101 if (f)
102 fclose(f);
103 return retval;
104}