File: [local] / sys / arch / alpha / stand / loadfile.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:04:49 2008 UTC (16 years, 4 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
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/* $OpenBSD: loadfile.c,v 1.17 2005/08/10 16:58:42 todd Exp $ */
/* $NetBSD: loadfile.c,v 1.3 1997/04/06 08:40:59 cgd 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. 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
*/
#define ELFSIZE 64
#include <lib/libkern/libkern.h>
#include <lib/libsa/stand.h>
#include <sys/param.h>
#include <sys/exec.h>
#include <sys/exec_ecoff.h>
#include <sys/exec_elf.h>
#include <machine/rpb.h>
#include <machine/prom.h>
#include <ddb/db_aout.h>
#define _KERNEL
#include "include/pte.h"
#ifdef ALPHA_BOOT_ELF
static int elf_exec(int, Elf64_Ehdr *, u_int64_t *);
#endif
int loadfile(char *, u_int64_t *);
paddr_t ffp_save, ptbr_save;
vaddr_t ssym, esym;
#define WARN(...)
/*
* Open 'filename', read in program and return the entry point or -1 if error.
*/
int
loadfile(fname, entryp)
char *fname;
u_int64_t *entryp;
{
struct devices *dp;
union {
#ifdef ALPHA_BOOT_ELF
Elf64_Ehdr elf;
#endif
} hdr;
int fd, rval;
(void)printf("Loading %s...\n", fname);
/* Open the file. */
rval = 1;
if ((fd = open(fname, 0)) < 0) {
WARN(("open %s: errno %d\n", fname, errno));
goto err;
}
/* Read the exec header. */
if (read(fd, &hdr, sizeof(hdr)) != sizeof(hdr)) {
WARN(("read header: %s\n", strerror(errno)));
goto err;
}
#ifdef ALPHA_BOOT_ELF
if (memcmp(ELFMAG, hdr.elf.e_ident, SELFMAG) == 0) {
rval = elf_exec(fd, &hdr.elf, entryp);
} else
#endif
{
(void)printf("%s: unknown executable format\n", fname);
}
err:
if (fd >= 0)
(void)close(fd);
return (rval);
}
#ifdef ALPHA_BOOT_ELF
static int
elf_exec(fd, elf, entryp)
int fd;
Elf64_Ehdr *elf;
u_int64_t *entryp;
{
int i;
int first = 1, havesyms;
Elf64_Shdr *shp;
Elf64_Off off;
size_t sz;
for (i = 0; i < elf->e_phnum; i++) {
Elf64_Phdr phdr;
(void)lseek(fd, elf->e_phoff + sizeof(phdr) * i, SEEK_SET);
if (read(fd, (void *)&phdr, sizeof(phdr)) != sizeof(phdr)) {
WARN(("read phdr: %s\n", strerror(errno)));
return (1);
}
if (phdr.p_type != PT_LOAD ||
(phdr.p_flags & (PF_W|PF_X)) == 0)
continue;
/* Read in segment. */
(void)printf("%s%lu", first ? "" : "+", phdr.p_filesz);
(void)lseek(fd, phdr.p_offset, SEEK_SET);
if (read(fd, (void *)phdr.p_vaddr, phdr.p_filesz) !=
phdr.p_filesz) {
WARN(("read text: %s\n", strerror(errno)));
return (1);
}
if (first || ffp_save < phdr.p_vaddr + phdr.p_memsz)
ffp_save = phdr.p_vaddr + phdr.p_memsz;
/* Zero out bss. */
if (phdr.p_filesz < phdr.p_memsz) {
(void)printf("+%lu", phdr.p_memsz - phdr.p_filesz);
bzero((caddr_t)phdr.p_vaddr + phdr.p_filesz,
phdr.p_memsz - phdr.p_filesz);
}
first = 0;
}
ffp_save = roundup(ffp_save, sizeof(long));
/*
* Retrieve symbols.
*/
ssym = ffp_save;
ffp_save += sizeof(Elf64_Ehdr);
if (lseek(fd, elf->e_shoff, SEEK_SET) == -1) {
WARN(("seek to section headers: %s\n", strerror(errno)));
return (1);
}
sz = elf->e_shnum * sizeof(Elf64_Shdr);
shp = (Elf64_Shdr *)ffp_save;
ffp_save += roundup(sz, sizeof(long));
if (read(fd, shp, sz) != sz) {
WARN(("read section headers: %d\n", strerror(errno)));
return (1);
}
/*
* Now load the symbol sections themselves. Make sure the
* sections are aligned. Don't bother with string tables if
* there are no symbol sections.
*/
off = roundup((sizeof(Elf64_Ehdr) + sz), sizeof(long));
for (havesyms = i = 0; i < elf->e_shnum; i++)
if (shp[i].sh_type == SHT_SYMTAB)
havesyms = 1;
if (!havesyms)
goto no_syms;
for (first = 1, i = 0; i < elf->e_shnum; i++) {
if (shp[i].sh_type == SHT_SYMTAB ||
shp[i].sh_type == SHT_STRTAB) {
printf("%s%ld", first ? " [" : "+",
(u_long)shp[i].sh_size);
if (lseek(fd, shp[i].sh_offset, SEEK_SET) == -1) {
WARN(("lseek symbols: %s\n", strerror(errno)));
return (1);
}
if (read(fd, (void *)ffp_save, shp[i].sh_size) !=
shp[i].sh_size) {
WARN(("read symbols: %s\n", strerror(errno)));
return (1);
}
ffp_save += roundup(shp[i].sh_size, sizeof(long));
shp[i].sh_offset = off;
off += roundup(shp[i].sh_size, sizeof(long));
first = 0;
}
}
if (havesyms && first == 0)
printf("]");
elf->e_phoff = 0;
elf->e_shoff = sizeof(Elf64_Ehdr);
elf->e_phentsize = 0;
elf->e_phnum = 0;
bcopy(elf, (void *)ssym, sizeof(*elf));
no_syms:
esym = ffp_save;
ffp_save = ALPHA_K0SEG_TO_PHYS((ffp_save + PGOFSET & ~PGOFSET)) >> PGSHIFT;
ffp_save += 2; /* XXX OSF/1 does this, no idea why. */
(void)printf("\n");
*entryp = elf->e_entry;
return (0);
}
#endif /* ALPHA_BOOT_ELF */