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x86, build: Fix portability issues when cross-building

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It would appear that we never actually generated a correct CRC when
building on a bigendian machine.  Depending on the word size, we would
either generate an all-zero CRC (64-bit machine) or a byte-swapped
CRC (32-bit machine.)  Fix the types used so we don't arbitrarily use
a 64-bit word to hold 32-bit numbers, and pass the CRC through
put_unaligned_le32() like all the other numbers.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Matt Fleming <matt@console-pimps.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Nick Bowler <nbowler@elliptictech.com>
Link: http://lkml.kernel.org/r/20120229111322.9eb4b23ff1672e8853ad3b3b@canb.auug.org.au
This commit is contained in:
H. Peter Anvin 2012-02-28 23:36:21 -08:00
parent b8d43cb504
commit a51f404775
1 changed files with 4 additions and 3 deletions
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7
arch/x86/boot/tools/build.c
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@ -36,7 +36,7 @@
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned long u32;
typedef unsigned int u32;
#define DEFAULT_MAJOR_ROOT 0
#define DEFAULT_MINOR_ROOT 0
@ -247,8 +247,9 @@ int main(int argc, char ** argv)
}
/* Write the CRC */
fprintf(stderr, "CRC %lx\n", crc);
if (fwrite(&crc, 1, 4, stdout) != 4)
fprintf(stderr, "CRC %x\n", crc);
put_unaligned_le32(crc, buf);
if (fwrite(buf, 1, 4, stdout) != 4)
die("Writing CRC failed");
close(fd);