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Appease gcc48 -Werror=strict-aliasing warning by filling cksum via union.

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Discussed in source-changes-d@ thread and tested on TT030.
Should be pulled up to netbsd-7 (if NetBSD/m68k 7.0 will switch to gcc48).
This commit is contained in:
tsutsui 2014-11-16 13:47:52 +00:00
parent bdfce4082b
commit 5663afc984
1 changed files with 8 additions and 3 deletions
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11
sys/arch/atari/stand/installboot/installboot.c
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@ -1,4 +1,4 @@
/* $NetBSD: installboot.c,v 1.31 2014/11/16 13:38:39 tsutsui Exp $ */
/* $NetBSD: installboot.c,v 1.32 2014/11/16 13:47:52 tsutsui Exp $ */
/*
* Copyright (c) 1995 Waldi Ravens
@ -467,6 +467,10 @@ mkbootblock(struct bootblock *bb, char *xxb, char *bxx,
struct disklabel *label, u_int magic)
{
int fd;
union {
struct bootblock *bbp;
uint16_t *word; /* to fill cksum word */
} bbsec;
memset(bb, 0, sizeof(*bb));
@ -498,8 +502,9 @@ mkbootblock(struct bootblock *bb, char *xxb, char *bxx,
setIDEpar(bb->bb_xxboot, sizeof(bb->bb_xxboot));
/* set AHDI checksum */
*((u_int16_t *)bb->bb_xxboot + 255) = 0;
*((u_int16_t *)bb->bb_xxboot + 255) = 0x1234 - abcksum(bb->bb_xxboot);
bbsec.bbp = bb;
bbsec.word[255] = 0;
bbsec.word[255] = 0x1234 - abcksum(bb->bb_xxboot);
if (verbose) {
printf("Primary boot loader: %s\n", xxb);