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alpha/boot/tools/objstrip: fix the check for ELF header

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[ Upstream commit 1878787797cbb019eeefe6f905514dcd557302b6 ]

Just memcmp() with ELFMAG - that's the normal way to do it in userland
code, which that thing is.  Besides, that has the benefit of actually
building - str_has_prefix() is *NOT* present in <string.h>.

Fixes: 5f14596e55 "alpha: Replace strncmp with str_has_prefix"
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Al Viro 2023-01-09 00:14:02 -05:00 committed by Greg Kroah-Hartman
parent 4cab7debf3
commit b0b84fd32c
1 changed files with 1 additions and 1 deletions
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arch/alpha/boot/tools/objstrip.c
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@ -148,7 +148,7 @@ main (int argc, char *argv[])
#ifdef __ELF__
elf = (struct elfhdr *) buf;
if (elf->e_ident[0] == 0x7f && str_has_prefix((char *)elf->e_ident + 1, "ELF")) {
if (memcmp(&elf->e_ident[EI_MAG0], ELFMAG, SELFMAG) == 0) {
if (elf->e_type != ET_EXEC) {
fprintf(stderr, "%s: %s is not an ELF executable\n",
prog_name, inname);