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Change from loading an a.out kernel to an ELF /boot.

This commit is contained in:
simonb 1999-03-25 05:16:06 +00:00
parent 0e44e536a0
commit c80fb4ccb8
1 changed files with 50 additions and 62 deletions
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108
sys/arch/pmax/stand/scsiboot/bootxx.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: bootxx.c,v 1.12 1999/03/14 00:57:07 simonb Exp $ */
/* $NetBSD: bootxx.c,v 1.13 1999/03/25 05:16:06 simonb Exp $ */
/*
* Copyright (c) 1992, 1993
@ -47,6 +47,9 @@
int errno;
int loadfile __P((char *name));
extern int clear_cache __P((char *addr, int len));
/*
* This gets arguments from the PROM, calls other routines to open
* and load the program to boot, and then transfers execution to that
@ -56,7 +59,7 @@ int errno;
* The argument "-a" means vmunix should do an automatic reboot.
*/
int
_main(argc, argv)
main(argc, argv)
int argc;
char **argv;
{
@ -69,95 +72,80 @@ _main(argc, argv)
argv++;
}
cp = *argv;
printf("Boot: %s\n", cp);
#ifdef notused
printf(">> NetBSD/pmax Primary Boot\n");
#endif
entry = loadfile(cp);
if (entry == -1)
return 0;
return (1);
printf("Starting at 0x%x\n\n", entry);
clear_cache((char *)RELOC, 1024 * 1024);
if (callv == &callvec)
((void (*)())entry)(argc, argv, 0, 0);
else
((void (*)())entry)(argc, argv, DEC_PROM_MAGIC, callv);
return (1);
}
/*
* Open 'filename', read in program and return the entry point or -1 if error.
*/
int
loadfile(fname)
register char *fname;
{
register struct devices *dp;
register int fd, i, n;
struct exec aout;
char *buf;
Elf32_Ehdr ehdr;
Elf32_Phdr phdr;
char bootfname[64];
if ((fd = open(fname, 0)) < 0) {
printf("open(%s) failed: %d\n", fname, errno);
strcpy(bootfname, fname);
buf = bootfname;
while ((n = *buf++) != '\0') {
if (n == ')')
break;
if (n != '/')
continue;
while ((n = *buf++) != '\0')
if (n == '/')
break;
break;
}
strcpy(buf, "boot");
if ((fd = open(bootfname, 0)) < 0) {
printf("open %s: %d\n", bootfname, errno);
goto err;
}
/* read the exec header */
i = read(fd, (char *)&aout, sizeof(aout));
if (i != sizeof(aout)) {
printf("no aout header\n");
goto cerr;
} else if ((N_GETMAGIC(aout) != OMAGIC)
&& (aout.a_midmag & 0xfff) != OMAGIC) {
printf("%s: bad magic %x\n", fname, aout.a_midmag);
i = read(fd, (char *)&ehdr, sizeof(ehdr));
if ((i != sizeof(ehdr)) ||
(bcmp(ehdr.e_ident, Elf32_e_ident, Elf32_e_siz) != 0)) {
printf("%s: No ELF header\n", bootfname);
goto cerr;
}
/* read the code ... */
printf("Size: %d", aout.a_text);
#if 0
/* In an OMAGIC file, we're already there. */
if (lseek(fd, (off_t)N_TXTOFF(aout), 0) < 0) {
for (i = 0; i < ehdr.e_phnum; i++) {
if (lseek(fd, (off_t) ehdr.e_phoff + i * sizeof(phdr), 0) < 0)
goto cerr;
if (read(fd, &phdr, sizeof(phdr)) != sizeof(phdr))
goto cerr;
if (phdr.p_type != Elf_pt_load)
continue;
if (lseek(fd, (off_t)phdr.p_offset, 0) < 0)
goto cerr;
if (read(fd, (char *)phdr.p_paddr, phdr.p_filesz) != phdr.p_filesz)
goto cerr;
}
#endif
n = read(fd, buf = (char *)aout.a_entry, aout.a_text);
/* ... and initialized data */
printf("+%d", aout.a_data);
n += read(fd, buf + aout.a_text, aout.a_data);
i = aout.a_text + aout.a_data;
if (aout.a_syms) {
/*
* Copy exec header to start of bss.
* Load symbols into end + sizeof(int).
*/
memcpy(buf += i, (char *)&aout, sizeof(aout));
printf("+[%d]", aout.a_syms + 4);
n += read(fd, buf += aout.a_bss + 4, aout.a_syms + 4);
i += aout.a_syms + 4;
buf += aout.a_syms;
n += read(fd, buf + 4, *(long *)buf);
i += *(long *)buf;
}
#ifndef SMALL
(void) close(fd);
#endif
if (n < 0) {
printf("read error %d\n", errno);
goto err;
} else if (n != i) {
printf("read() short %d bytes\n", i - n);
goto err;
}
/* kernel will zero out its own bss */
n = aout.a_bss;
printf("+%d\n", n);
return ((int)aout.a_entry);
return (ehdr.e_entry);
cerr:
#ifndef SMALL
#ifndef UFS_NOCLOSE
(void) close(fd);
#endif
err:
printf("Can't boot '%s'\n", fname);
printf("Can't load '%s'\n", bootfname);
return (-1);
}