1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include <stdio.h>
3*4882a593Smuzhiyun #include <stdlib.h>
4*4882a593Smuzhiyun #include <string.h>
5*4882a593Smuzhiyun #include <elf.h>
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun int
main(int argc,char ** argv)8*4882a593Smuzhiyun main(int argc, char **argv)
9*4882a593Smuzhiyun {
10*4882a593Smuzhiyun unsigned char ei[EI_NIDENT];
11*4882a593Smuzhiyun union { short s; char c[2]; } endian_test;
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun if (fread(ei, 1, EI_NIDENT, stdin) != EI_NIDENT) {
14*4882a593Smuzhiyun fprintf(stderr, "Error: input truncated\n");
15*4882a593Smuzhiyun return 1;
16*4882a593Smuzhiyun }
17*4882a593Smuzhiyun if (memcmp(ei, ELFMAG, SELFMAG) != 0) {
18*4882a593Smuzhiyun fprintf(stderr, "Error: not ELF\n");
19*4882a593Smuzhiyun return 1;
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun switch (ei[EI_CLASS]) {
22*4882a593Smuzhiyun case ELFCLASS32:
23*4882a593Smuzhiyun printf("#define KERNEL_ELFCLASS ELFCLASS32\n");
24*4882a593Smuzhiyun break;
25*4882a593Smuzhiyun case ELFCLASS64:
26*4882a593Smuzhiyun printf("#define KERNEL_ELFCLASS ELFCLASS64\n");
27*4882a593Smuzhiyun break;
28*4882a593Smuzhiyun default:
29*4882a593Smuzhiyun exit(1);
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun switch (ei[EI_DATA]) {
32*4882a593Smuzhiyun case ELFDATA2LSB:
33*4882a593Smuzhiyun printf("#define KERNEL_ELFDATA ELFDATA2LSB\n");
34*4882a593Smuzhiyun break;
35*4882a593Smuzhiyun case ELFDATA2MSB:
36*4882a593Smuzhiyun printf("#define KERNEL_ELFDATA ELFDATA2MSB\n");
37*4882a593Smuzhiyun break;
38*4882a593Smuzhiyun default:
39*4882a593Smuzhiyun exit(1);
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun if (sizeof(unsigned long) == 4) {
43*4882a593Smuzhiyun printf("#define HOST_ELFCLASS ELFCLASS32\n");
44*4882a593Smuzhiyun } else if (sizeof(unsigned long) == 8) {
45*4882a593Smuzhiyun printf("#define HOST_ELFCLASS ELFCLASS64\n");
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun endian_test.s = 0x0102;
49*4882a593Smuzhiyun if (memcmp(endian_test.c, "\x01\x02", 2) == 0)
50*4882a593Smuzhiyun printf("#define HOST_ELFDATA ELFDATA2MSB\n");
51*4882a593Smuzhiyun else if (memcmp(endian_test.c, "\x02\x01", 2) == 0)
52*4882a593Smuzhiyun printf("#define HOST_ELFDATA ELFDATA2LSB\n");
53*4882a593Smuzhiyun else
54*4882a593Smuzhiyun exit(1);
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun return 0;
57*4882a593Smuzhiyun }
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