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Add load_sun() which does the guts of exec_sun() but lets

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the caller do the file open/close and control transfer.
This commit is contained in:
gwr 1998-06-29 20:02:49 +00:00
parent cc865e4609
commit 57a3ff9f72
1 changed files with 29 additions and 18 deletions
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47
sys/arch/sun3/stand/libsa/exec_sun.c
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@ -1,4 +1,4 @@
/* $NetBSD: exec_sun.c,v 1.8 1998/02/05 04:57:10 gwr Exp $ */
/* $NetBSD: exec_sun.c,v 1.9 1998/06/29 20:02:49 gwr Exp $ */
/*-
* Copyright (c) 1982, 1986, 1990, 1993
@ -44,17 +44,12 @@
int errno;
/*ARGSUSED*/
int
exec_sun(file, loadaddr)
int exec_sun(file, loadaddr)
char *file;
char *loadaddr;
{
register int io;
struct exec x;
int cc, magic;
void *entry;
register char *cp;
register int *ip;
char *entry;
int io, rv;
#ifdef DEBUG
printf("exec_sun: file=%s loadaddr=0x%x\n", file, loadaddr);
@ -63,6 +58,28 @@ exec_sun(file, loadaddr)
io = open(file, 0);
if (io < 0)
return(-1);
rv = load_sun(io, loadaddr, &entry);
close(io);
if (rv == 0) {
printf("Starting program at 0x%x\n", entry);
chain_to((void*)entry);
/* not reached */
}
return (rv);
}
/*ARGSUSED*/
int load_sun(io, loadaddr, entry)
int io;
char *loadaddr;
char **entry;
{
struct exec x;
int cc, magic;
register char *cp;
register int *ip;
/*
* Read in the exec header, and validate it.
@ -71,14 +88,14 @@ exec_sun(file, loadaddr)
goto shread;
if (N_BADMAG(x)) {
errno = EFTYPE;
goto closeout;
return (-1);
}
cp = loadaddr;
magic = N_GETMAGIC(x);
if (magic == ZMAGIC)
cp += sizeof(x);
entry = cp;
*entry = cp;
/*
* Leave a copy of the exec header before the text.
@ -161,16 +178,10 @@ exec_sun(file, loadaddr)
cp += cc;
}
printf("=0x%x\n", cp - loadaddr);
close(io);
printf("Starting program at 0x%x\n", (int)entry);
chain_to(entry);
/* not reached */
return (0);
shread:
printf("exec: short read\n");
errno = EIO;
closeout:
close(io);
return(-1);
}