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wcopy/wzero belong here

This commit is contained in:
deraadt 1994-11-25 23:10:26 +00:00
parent e7728e3080
commit fc5e9a48e2
1 changed files with 73 additions and 3 deletions
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76
sys/arch/sparc/sparc/machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: machdep.c,v 1.35 1994/11/23 07:00:10 deraadt Exp $ */
/* $NetBSD: machdep.c,v 1.36 1994/11/25 23:10:26 deraadt Exp $ */
/*
* Copyright (c) 1992, 1993
@ -531,8 +531,8 @@ sigreturn(p, uap, retval)
sigexit(p, SIGILL);
#ifdef DEBUG
if (sigdebug & SDB_FOLLOW)
printf("sigreturn: %s[%d], scp %x\n",
p->p_comm, p->p_pid, SCARG(uap, scp));
printf("sigreturn: %s[%d], sigcntxp %x\n",
p->p_comm, p->p_pid, SCARG(uap, sigcntxp));
#endif
scp = SCARG(uap, sigcntxp);
if ((int)scp & 3 || useracc((caddr_t)scp, sizeof *scp, B_WRITE) == 0)
@ -1037,3 +1037,73 @@ caddr_t addr;
splx(s);
return (res);
}
void
wzero(vb, l)
void *vb;
u_int l;
{
u_char *b = vb;
u_char *be = b + l;
u_short *sp;
if (l == 0)
return;
/* front, */
if ((u_long)b & 1)
*b++ = 0;
/* back, */
if (b != be && ((u_long)be & 1) != 0) {
be--;
*be = 0;
}
/* and middle. */
sp = (u_short *)b;
while (sp != (u_short *)be)
*sp++ = 0;
}
void
wcopy(vb1, vb2, l)
const void *vb1;
void *vb2;
u_int l;
{
const u_char *b1e, *b1 = vb1;
u_char *b2 = vb2;
u_short *sp;
int bstore = 0;
if (l == 0)
return;
/* front, */
if ((u_long)b1 & 1) {
*b2++ = *b1++;
l--;
}
/* middle, */
sp = (u_short *)b1;
b1e = b1 + l;
if (l & 1)
b1e--;
bstore = (u_long)b2 & 1;
while (sp < (u_short *)b1e) {
if (bstore) {
b2[1] = *sp & 0xff;
b2[0] = *sp >> 8;
} else
*((short *)b2) = *sp;
sp++;
b2 += 2;
}
/* and back. */
if (l & 1)
*b2 = *b1e;
}