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