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/* $OpenBSD: loadfile.c,v 1.2 1996/11/27 19:54:48 niklas Exp $ */
/* $NetBSD: loadfile.c,v 1.3 1996/09/23 04:32:44 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. 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
*/
#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>
#define _KERNEL
#include "include/pte.h"
#ifdef ALPHA_BOOT_ECOFF
static int coff_exec __P((int, struct ecoff_exechdr *, u_int64_t *));
#endif
#ifdef ALPHA_BOOT_ELF
static int elf_exec __P((int, Elf_Ehdr *, u_int64_t *));
#endif
int loadfile __P((char *, u_int64_t *));
vm_offset_t ffp_save, ptbr_save;
/*
* 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_ECOFF
struct ecoff_exechdr coff;
#endif
#ifdef ALPHA_BOOT_ELF
Elf_Ehdr elf;
#endif
} hdr;
ssize_t nr;
int fd, rval;
/* Open the file. */
rval = 1;
if ((fd = open(fname, 0)) < 0) {
(void)printf("open %s: error %d\n", fname, errno);
goto err;
}
/* Read the exec header. */
if ((nr = read(fd, &hdr, sizeof(hdr))) != sizeof(hdr)) {
(void)printf("read header: error %d\n", errno);
goto err;
}
#ifdef ALPHA_BOOT_ECOFF
if (!ECOFF_BADMAG(&hdr.coff)) {
rval = coff_exec(fd, &hdr.coff, entryp);
} else
#endif
#ifdef ALPHA_BOOT_ELF
if (memcmp(Elf_e_ident, hdr.elf.e_ident, Elf_e_siz) == 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_ECOFF
static int
coff_exec(fd, coff, entryp)
int fd;
struct ecoff_exechdr *coff;
u_int64_t *entryp;
{
/* Read in text. */
(void)printf("%lu", coff->a.tsize);
(void)lseek(fd, ECOFF_TXTOFF(coff), 0);
if (read(fd, (void *)coff->a.text_start, coff->a.tsize) !=
coff->a.tsize) {
(void)printf("read text: %d\n", errno);
return (1);
}
/* Read in data. */
if (coff->a.dsize != 0) {
(void)printf("+%lu", coff->a.dsize);
if (read(fd, (void *)coff->a.data_start, coff->a.dsize) !=
coff->a.dsize) {
(void)printf("read data: %d\n", errno);
return (1);
}
}
/* Zero out bss. */
if (coff->a.bsize != 0) {
(void)printf("+%lu", coff->a.bsize);
bzero((void *)coff->a.bss_start, coff->a.bsize);
}
ffp_save = coff->a.text_start + coff->a.tsize;
if (ffp_save < coff->a.data_start + coff->a.dsize)
ffp_save = coff->a.data_start + coff->a.dsize;
if (ffp_save < coff->a.bss_start + coff->a.bsize)
ffp_save = coff->a.bss_start + coff->a.bsize;
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 = coff->a.entry;
return (0);
}
#endif /* ALPHA_BOOT_ECOFF */
#ifdef ALPHA_BOOT_ELF
static int
elf_exec(fd, elf, entryp)
int fd;
Elf_Ehdr *elf;
u_int64_t *entryp;
{
int i;
int first = 1;
for (i = 0; i < elf->e_phnum; i++) {
Elf_Phdr phdr;
(void)lseek(fd, elf->e_phoff + sizeof(phdr) * i, 0);
if (read(fd, (void *)&phdr, sizeof(phdr)) != sizeof(phdr)) {
(void)printf("read phdr: %d\n", errno);
return (1);
}
if (phdr.p_type != Elf_pt_load ||
(phdr.p_flags & (Elf_pf_w|Elf_pf_x)) == 0)
continue;
/* Read in segment. */
(void)printf("%s%lu", first ? "" : "+", phdr.p_filesz);
(void)lseek(fd, phdr.p_offset, 0);
if (read(fd, (void *)phdr.p_vaddr, phdr.p_filesz) !=
phdr.p_filesz) {
(void)printf("read text: %d\n", 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(phdr.p_vaddr + phdr.p_filesz,
phdr.p_memsz - phdr.p_filesz);
}
first = 0;
}
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 */
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