blob: db3881f14c2d911d7bbf5d2b98d67a30e771b2fe [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <stdio.h>
2#include <stdlib.h>
3#include <string.h>
4#include <elf.h>
5
6int
7main(int argc, char **argv)
8{
Sam Ravnborg62070fa2006-03-03 16:46:04 +01009 unsigned char ei[EI_NIDENT];
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 union { short s; char c[2]; } endian_test;
11
12 if (argc != 2) {
13 fprintf(stderr, "Error: no arch\n");
14 }
15 if (fread(ei, 1, EI_NIDENT, stdin) != EI_NIDENT) {
16 fprintf(stderr, "Error: input truncated\n");
17 return 1;
18 }
19 if (memcmp(ei, ELFMAG, SELFMAG) != 0) {
20 fprintf(stderr, "Error: not ELF\n");
21 return 1;
22 }
23 switch (ei[EI_CLASS]) {
24 case ELFCLASS32:
25 printf("#define KERNEL_ELFCLASS ELFCLASS32\n");
26 break;
27 case ELFCLASS64:
28 printf("#define KERNEL_ELFCLASS ELFCLASS64\n");
29 break;
30 default:
Sam Ravnborg6803dc02006-06-24 23:46:54 +020031 exit(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 }
33 switch (ei[EI_DATA]) {
34 case ELFDATA2LSB:
35 printf("#define KERNEL_ELFDATA ELFDATA2LSB\n");
36 break;
37 case ELFDATA2MSB:
38 printf("#define KERNEL_ELFDATA ELFDATA2MSB\n");
39 break;
40 default:
Sam Ravnborg6803dc02006-06-24 23:46:54 +020041 exit(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 }
43
44 if (sizeof(unsigned long) == 4) {
45 printf("#define HOST_ELFCLASS ELFCLASS32\n");
46 } else if (sizeof(unsigned long) == 8) {
47 printf("#define HOST_ELFCLASS ELFCLASS64\n");
48 }
49
50 endian_test.s = 0x0102;
51 if (memcmp(endian_test.c, "\x01\x02", 2) == 0)
52 printf("#define HOST_ELFDATA ELFDATA2MSB\n");
53 else if (memcmp(endian_test.c, "\x02\x01", 2) == 0)
54 printf("#define HOST_ELFDATA ELFDATA2LSB\n");
55 else
Sam Ravnborg6803dc02006-06-24 23:46:54 +020056 exit(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Bryan Wu1394f032007-05-06 14:50:22 -070058 if ((strcmp(argv[1], "v850") == 0) || (strcmp(argv[1], "h8300") == 0)
59 || (strcmp(argv[1], "blackfin") == 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 printf("#define MODULE_SYMBOL_PREFIX \"_\"\n");
Sam Ravnborg62070fa2006-03-03 16:46:04 +010061 else
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 printf("#define MODULE_SYMBOL_PREFIX \"\"\n");
63
64 return 0;
65}
66