forked from mirrors/linux
a660deb0f1
Endianness is currently detected on compile-time, but we can defer this until run-time. This change avoids re-executing scripts/mod/mk_elfconfig even if modpost in the linux-headers package needs to be rebuilt for a foreign architecture. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
32 lines
604 B
C
32 lines
604 B
C
// 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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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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return 0;
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}
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