1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /* ----------------------------------------------------------------------- *
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (C) 2009 Intel Corporation. All rights reserved.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * H. Peter Anvin <hpa@linux.intel.com>
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * -----------------------------------------------------------------------
9*4882a593Smuzhiyun *
10*4882a593Smuzhiyun * Outputs a small assembly wrapper with the appropriate symbols defined.
11*4882a593Smuzhiyun */
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include <stdlib.h>
14*4882a593Smuzhiyun #include <stdio.h>
15*4882a593Smuzhiyun #include <string.h>
16*4882a593Smuzhiyun #include <inttypes.h>
17*4882a593Smuzhiyun #include <tools/le_byteshift.h>
18*4882a593Smuzhiyun
main(int argc,char * argv[])19*4882a593Smuzhiyun int main(int argc, char *argv[])
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun uint32_t olen;
22*4882a593Smuzhiyun long ilen;
23*4882a593Smuzhiyun FILE *f = NULL;
24*4882a593Smuzhiyun int retval = 1;
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun if (argc < 2) {
27*4882a593Smuzhiyun fprintf(stderr, "Usage: %s compressed_file\n", argv[0]);
28*4882a593Smuzhiyun goto bail;
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun /* Get the information for the compressed kernel image first */
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun f = fopen(argv[1], "r");
34*4882a593Smuzhiyun if (!f) {
35*4882a593Smuzhiyun perror(argv[1]);
36*4882a593Smuzhiyun goto bail;
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun if (fseek(f, -4L, SEEK_END)) {
41*4882a593Smuzhiyun perror(argv[1]);
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun if (fread(&olen, sizeof(olen), 1, f) != 1) {
45*4882a593Smuzhiyun perror(argv[1]);
46*4882a593Smuzhiyun goto bail;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun ilen = ftell(f);
50*4882a593Smuzhiyun olen = get_unaligned_le32(&olen);
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun printf(".section \".rodata..compressed\",\"a\",@progbits\n");
53*4882a593Smuzhiyun printf(".globl z_input_len\n");
54*4882a593Smuzhiyun printf("z_input_len = %lu\n", ilen);
55*4882a593Smuzhiyun printf(".globl z_output_len\n");
56*4882a593Smuzhiyun printf("z_output_len = %lu\n", (unsigned long)olen);
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun printf(".globl input_data, input_data_end\n");
59*4882a593Smuzhiyun printf("input_data:\n");
60*4882a593Smuzhiyun printf(".incbin \"%s\"\n", argv[1]);
61*4882a593Smuzhiyun printf("input_data_end:\n");
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun printf(".section \".rodata\",\"a\",@progbits\n");
64*4882a593Smuzhiyun printf(".globl input_len\n");
65*4882a593Smuzhiyun printf("input_len:\n\t.long %lu\n", ilen);
66*4882a593Smuzhiyun printf(".globl output_len\n");
67*4882a593Smuzhiyun printf("output_len:\n\t.long %lu\n", (unsigned long)olen);
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun retval = 0;
70*4882a593Smuzhiyun bail:
71*4882a593Smuzhiyun if (f)
72*4882a593Smuzhiyun fclose(f);
73*4882a593Smuzhiyun return retval;
74*4882a593Smuzhiyun }
75