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/* $NetBSD: boot.c,v 1.6 1995/06/28 10:22:32 jonathan Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)boot.c 8.1 (Berkeley) 6/10/93
*/
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/exec.h>
#include <sys/exec_elf.h>
#include <stand.h>
#include <errno.h>
char line[1024];
void gets __P((char *));
ssize_t read __P((int, void *, size_t));
int close __P((int));
void prom_write __P((int, char *, int));
int main __P((int, char **));
int loadfile __P((char *));
/*
* This gets arguments from the PROM, calls other routines to open
* and load the program to boot, and then transfers execution to that
* new program.
* Argv[0] should be something like "rz(0,0,0)vmunix" on a DECstation 3100.
* Argv[0,1] should be something like "boot 5/rz0/vmunix" on a DECstation 5000.
* The argument "-a" means vmunix should do an automatic reboot.
*/
int
main(argc, argv)
int argc;
char **argv;
{
char *cp = 0;
int ask, entry;
ask = 1;
if(strcmp(argv[0], "man") != 0) {
cp = argv[0];
ask = 0;
}
while(1) {
do {
printf("Boot: ");
if (ask) {
gets(line);
cp = line;
argv[0] = cp;
argc = 1;
} else
printf("%s\n", cp);
} while(ask && line[0] == '\0');
entry = loadfile(cp);
if (entry != -1) {
printf("Starting at 0x%x\n\n", entry);
((void (*)())entry)(argc, argv, 0, 0);
}
}
return(0);
}
/*
* Open 'filename', read in program and return the entry point or -1 if error.
*/
int
loadfile(fname)
register char *fname;
{
int fd, i;
Elf32_Ehdr eh;
Elf32_Phdr *ph;
u_long phsize;
if ((fd = oopen(fname, 0)) < 0) {
printf("open(%s) failed: %d\n", fname, errno);
goto err;
}
/* read the elf header */
if(oread(fd, (char *)&eh, sizeof(eh)) != sizeof(eh)) {
goto serr;
}
phsize = eh.e_phnum * sizeof(Elf32_Phdr);
ph = (Elf32_Phdr *) alloc(phsize);
olseek(fd, eh.e_phoff, 0);
if(oread(fd, (char *)ph, phsize) != phsize) {
goto serr;
}
for(i = 0; i < eh.e_phnum; i++) {
switch (ph[i].p_type) {
case PT_LOAD:
olseek(fd, ph[i].p_offset, 0);
if(oread(fd, (char *)ph[i].p_paddr, ph[i].p_filesz) != ph[i].p_filesz) {
goto serr;
}
break;
default:
break;
}
}
(void) oclose(fd);
return(eh.e_entry);
serr:
printf("Read size error\n");
err:
printf("Can't boot '%s'\n", fname);
(void) oclose(fd);
return (-1);
}
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