mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-14 15:54:15 +08:00
57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <elf.h>
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
unsigned char ei[EI_NIDENT];
|
|
union { short s; char c[2]; } endian_test;
|
|
|
|
if (fread(ei, 1, EI_NIDENT, stdin) != EI_NIDENT) {
|
|
fprintf(stderr, "Error: input truncated\n");
|
|
return 1;
|
|
}
|
|
if (memcmp(ei, ELFMAG, SELFMAG) != 0) {
|
|
fprintf(stderr, "Error: not ELF\n");
|
|
return 1;
|
|
}
|
|
switch (ei[EI_CLASS]) {
|
|
case ELFCLASS32:
|
|
printf("#define KERNEL_ELFCLASS ELFCLASS32\n");
|
|
break;
|
|
case ELFCLASS64:
|
|
printf("#define KERNEL_ELFCLASS ELFCLASS64\n");
|
|
break;
|
|
default:
|
|
exit(1);
|
|
}
|
|
switch (ei[EI_DATA]) {
|
|
case ELFDATA2LSB:
|
|
printf("#define KERNEL_ELFDATA ELFDATA2LSB\n");
|
|
break;
|
|
case ELFDATA2MSB:
|
|
printf("#define KERNEL_ELFDATA ELFDATA2MSB\n");
|
|
break;
|
|
default:
|
|
exit(1);
|
|
}
|
|
|
|
if (sizeof(unsigned long) == 4) {
|
|
printf("#define HOST_ELFCLASS ELFCLASS32\n");
|
|
} else if (sizeof(unsigned long) == 8) {
|
|
printf("#define HOST_ELFCLASS ELFCLASS64\n");
|
|
}
|
|
|
|
endian_test.s = 0x0102;
|
|
if (memcmp(endian_test.c, "\x01\x02", 2) == 0)
|
|
printf("#define HOST_ELFDATA ELFDATA2MSB\n");
|
|
else if (memcmp(endian_test.c, "\x02\x01", 2) == 0)
|
|
printf("#define HOST_ELFDATA ELFDATA2LSB\n");
|
|
else
|
|
exit(1);
|
|
|
|
return 0;
|
|
}
|