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57 lines
1.2 KiB
57 lines
1.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <elf.h> |
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int |
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main(int argc, char **argv) |
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{ |
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unsigned char ei[EI_NIDENT]; |
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union { short s; char c[2]; } endian_test; |
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if (fread(ei, 1, EI_NIDENT, stdin) != EI_NIDENT) { |
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fprintf(stderr, "Error: input truncated\n"); |
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return 1; |
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} |
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if (memcmp(ei, ELFMAG, SELFMAG) != 0) { |
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fprintf(stderr, "Error: not ELF\n"); |
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return 1; |
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} |
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switch (ei[EI_CLASS]) { |
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case ELFCLASS32: |
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printf("#define KERNEL_ELFCLASS ELFCLASS32\n"); |
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break; |
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case ELFCLASS64: |
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printf("#define KERNEL_ELFCLASS ELFCLASS64\n"); |
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break; |
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default: |
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exit(1); |
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} |
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switch (ei[EI_DATA]) { |
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case ELFDATA2LSB: |
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printf("#define KERNEL_ELFDATA ELFDATA2LSB\n"); |
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break; |
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case ELFDATA2MSB: |
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printf("#define KERNEL_ELFDATA ELFDATA2MSB\n"); |
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break; |
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default: |
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exit(1); |
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} |
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if (sizeof(unsigned long) == 4) { |
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printf("#define HOST_ELFCLASS ELFCLASS32\n"); |
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} else if (sizeof(unsigned long) == 8) { |
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printf("#define HOST_ELFCLASS ELFCLASS64\n"); |
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} |
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endian_test.s = 0x0102; |
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if (memcmp(endian_test.c, "\x01\x02", 2) == 0) |
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printf("#define HOST_ELFDATA ELFDATA2MSB\n"); |
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else if (memcmp(endian_test.c, "\x02\x01", 2) == 0) |
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printf("#define HOST_ELFDATA ELFDATA2LSB\n"); |
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else |
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exit(1); |
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return 0; |
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}
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