diff options
Diffstat (limited to 'sys/arch/wgrisc/stand/boot/boot.c')
| -rw-r--r-- | sys/arch/wgrisc/stand/boot/boot.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/sys/arch/wgrisc/stand/boot/boot.c b/sys/arch/wgrisc/stand/boot/boot.c new file mode 100644 index 00000000000..6892d6a6a23 --- /dev/null +++ b/sys/arch/wgrisc/stand/boot/boot.c @@ -0,0 +1,149 @@ +/* $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); +} |