NetBSD/sys/lib/libsa/loadfile.c

641 lines
16 KiB
C

/* $NetBSD: loadfile.c,v 1.17 2001/07/31 22:11:57 bjh21 Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center and by Christos Zoulas.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* 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
*/
#ifdef _STANDALONE
#include <lib/libsa/stand.h>
#include <lib/libkern/libkern.h>
#else
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <err.h>
#endif
#include <sys/param.h>
#include <sys/exec.h>
#include "loadfile.h"
#ifdef BOOT_ECOFF
#include <sys/exec_ecoff.h>
static int coff_exec __P((int, struct ecoff_exechdr *, u_long *, int));
#endif
#ifdef BOOT_ELF
#include <sys/exec_elf.h>
static int elf_exec __P((int, Elf_Ehdr *, u_long *, int));
#endif
#ifdef BOOT_AOUT
#include <sys/exec_aout.h>
static int aout_exec __P((int, struct exec *, u_long *, int));
#endif
/*
* Open 'filename', read in program and and return 0 if ok 1 on error.
* Fill in marks
*/
int
loadfile(fname, marks, flags)
const char *fname;
u_long *marks;
int flags;
{
union {
#ifdef BOOT_ECOFF
struct ecoff_exechdr coff;
#endif
#ifdef BOOT_ELF
Elf_Ehdr elf;
#endif
#ifdef BOOT_AOUT
struct exec aout;
#endif
} hdr;
ssize_t nr;
int fd, rval;
/* Open the file. */
if ((fd = open(fname, 0)) < 0) {
WARN(("open %s", fname ? fname : "<default>"));
return -1;
}
/* Read the exec header. */
if ((nr = read(fd, &hdr, sizeof(hdr))) != sizeof(hdr)) {
WARN(("read header"));
goto err;
}
#ifdef BOOT_ECOFF
if (!ECOFF_BADMAG(&hdr.coff)) {
rval = coff_exec(fd, &hdr.coff, marks, flags);
} else
#endif
#ifdef BOOT_ELF
if (memcmp(hdr.elf.e_ident, ELFMAG, SELFMAG) == 0 &&
hdr.elf.e_ident[EI_CLASS] == ELFCLASS) {
rval = elf_exec(fd, &hdr.elf, marks, flags);
} else
#endif
#ifdef BOOT_AOUT
if (OKMAGIC(N_GETMAGIC(hdr.aout))
#ifndef NO_MID_CHECK
&& N_GETMID(hdr.aout) == MID_MACHINE
#endif
) {
rval = aout_exec(fd, &hdr.aout, marks, flags);
} else
#endif
{
rval = 1;
errno = EFTYPE;
WARN(("%s", fname ? fname : "<default>"));
}
if (rval == 0) {
PROGRESS(("=0x%lx\n", marks[MARK_END] - marks[MARK_START]));
return fd;
}
err:
(void)close(fd);
return -1;
}
#ifdef BOOT_ECOFF
static int
coff_exec(fd, coff, marks, flags)
int fd;
struct ecoff_exechdr *coff;
u_long *marks;
int flags;
{
paddr_t offset = marks[MARK_START];
paddr_t minp = ~0, maxp = 0, pos;
/* Read in text. */
if (lseek(fd, ECOFF_TXTOFF(coff), SEEK_SET) == -1) {
WARN(("lseek text"));
return 1;
}
if (coff->a.tsize != 0) {
if (flags & LOAD_TEXT) {
PROGRESS(("%lu", coff->a.tsize));
if (READ(fd, coff->a.text_start, coff->a.tsize) !=
coff->a.tsize) {
return 1;
}
}
else {
if (lseek(fd, coff->a.tsize, SEEK_CUR) == -1) {
WARN(("read text"));
return 1;
}
}
if (flags & (COUNT_TEXT|LOAD_TEXT)) {
pos = coff->a.text_start;
if (minp > pos)
minp = pos;
pos += coff->a.tsize;
if (maxp < pos)
maxp = pos;
}
}
/* Read in data. */
if (coff->a.dsize != 0) {
if (flags & LOAD_DATA) {
PROGRESS(("+%lu", coff->a.dsize));
if (READ(fd, coff->a.data_start, coff->a.dsize) !=
coff->a.dsize) {
WARN(("read data"));
return 1;
}
}
if (flags & (COUNT_DATA|LOAD_DATA)) {
pos = coff->a.data_start;
if (minp > pos)
minp = pos;
pos += coff->a.dsize;
if (maxp < pos)
maxp = pos;
}
}
/* Zero out bss. */
if (coff->a.bsize != 0) {
if (flags & LOAD_BSS) {
PROGRESS(("+%lu", coff->a.bsize));
BZERO(coff->a.bss_start, coff->a.bsize);
}
if (flags & (COUNT_BSS|LOAD_BSS)) {
pos = coff->a.bss_start;
if (minp > pos)
minp = pos;
pos = coff->a.bsize;
if (maxp < pos)
maxp = pos;
}
}
marks[MARK_START] = LOADADDR(minp);
marks[MARK_ENTRY] = LOADADDR(coff->a.entry);
marks[MARK_NSYM] = 1; /* XXX: Kernel needs >= 0 */
marks[MARK_SYM] = LOADADDR(maxp);
marks[MARK_END] = LOADADDR(maxp);
return 0;
}
#endif /* BOOT_ECOFF */
#ifdef BOOT_ELF
static int
elf_exec(fd, elf, marks, flags)
int fd;
Elf_Ehdr *elf;
u_long *marks;
int flags;
{
Elf_Shdr *shp;
int i, j;
size_t sz;
int first;
paddr_t minp = ~0, maxp = 0, pos = 0;
paddr_t offset = marks[MARK_START], shpp, elfp = NULL;
for (first = 1, i = 0; i < elf->e_phnum; i++) {
Elf_Phdr phdr;
if (lseek(fd, elf->e_phoff + sizeof(phdr) * i, SEEK_SET)
== -1) {
WARN(("lseek phdr"));
return 1;
}
if (read(fd, (void *)&phdr, sizeof(phdr)) != sizeof(phdr)) {
WARN(("read phdr"));
return 1;
}
if (phdr.p_type != PT_LOAD ||
(phdr.p_flags & (PF_W|PF_X)) == 0)
continue;
#define IS_TEXT(p) (p.p_flags & PF_X)
#define IS_DATA(p) (p.p_flags & PF_W)
#define IS_BSS(p) (p.p_filesz < p.p_memsz)
/*
* XXX: Assume first address is lowest
*/
if ((IS_TEXT(phdr) && (flags & LOAD_TEXT)) ||
(IS_DATA(phdr) && (flags & LOAD_DATA))) {
/* Read in segment. */
PROGRESS(("%s%lu", first ? "" : "+",
(u_long)phdr.p_filesz));
if (lseek(fd, phdr.p_offset, SEEK_SET) == -1) {
WARN(("lseek text"));
return 1;
}
if (READ(fd, phdr.p_vaddr, phdr.p_filesz) !=
phdr.p_filesz) {
WARN(("read text"));
return 1;
}
first = 0;
}
if ((IS_TEXT(phdr) && (flags & (LOAD_TEXT|COUNT_TEXT))) ||
(IS_DATA(phdr) && (flags & (LOAD_DATA|COUNT_TEXT)))) {
pos = phdr.p_vaddr;
if (minp > pos)
minp = pos;
pos += phdr.p_filesz;
if (maxp < pos)
maxp = pos;
}
/* Zero out bss. */
if (IS_BSS(phdr) && (flags & LOAD_BSS)) {
PROGRESS(("+%lu",
(u_long)(phdr.p_memsz - phdr.p_filesz)));
BZERO((phdr.p_vaddr + phdr.p_filesz),
phdr.p_memsz - phdr.p_filesz);
}
if (IS_BSS(phdr) && (flags & (LOAD_BSS|COUNT_BSS))) {
pos += phdr.p_memsz - phdr.p_filesz;
if (maxp < pos)
maxp = pos;
}
}
/*
* Copy the ELF and section headers.
*/
maxp = roundup(maxp, sizeof(long));
if (flags & (LOAD_HDR|COUNT_HDR)) {
elfp = maxp;
maxp += sizeof(Elf_Ehdr);
}
if (flags & (LOAD_SYM|COUNT_SYM)) {
if (lseek(fd, elf->e_shoff, SEEK_SET) == -1) {
WARN(("lseek section headers"));
return 1;
}
sz = elf->e_shnum * sizeof(Elf_Shdr);
shp = ALLOC(sz);
if (read(fd, shp, sz) != sz) {
WARN(("read section headers"));
return 1;
}
shpp = maxp;
maxp += roundup(sz, sizeof(long));
/*
* Now load the symbol sections themselves. Make sure
* the sections are aligned. Don't bother with any
* string table that isn't referenced by a symbol
* table.
*/
for (first = 1, i = 0; i < elf->e_shnum; i++) {
switch (shp[i].sh_type) {
case SHT_STRTAB:
for (j = 0; j < elf->e_shnum; j++)
if (shp[j].sh_type == SHT_SYMTAB &&
shp[j].sh_link == i)
goto havesym;
/* FALLTHROUGH */
default:
/* Not loading this, so zero out the offset. */
shp[i].sh_offset = 0;
break;
havesym:
case SHT_SYMTAB:
if (flags & LOAD_SYM) {
PROGRESS(("%s%ld", first ? " [" : "+",
(u_long)shp[i].sh_size));
if (lseek(fd, shp[i].sh_offset,
SEEK_SET) == -1) {
WARN(("lseek symbols"));
FREE(shp, sz);
return 1;
}
if (READ(fd, maxp, shp[i].sh_size) !=
shp[i].sh_size) {
WARN(("read symbols"));
FREE(shp, sz);
return 1;
}
}
shp[i].sh_offset = maxp - elfp;
maxp += roundup(shp[i].sh_size,
sizeof(long));
first = 0;
}
/* Since we don't load .shstrtab, zero the name. */
shp[i].sh_name = 0;
}
if (flags & LOAD_SYM) {
BCOPY(shp, shpp, sz);
if (first == 0)
PROGRESS(("]"));
}
FREE(shp, sz);
}
/*
* Frob the copied ELF header to give information relative
* to elfp.
*/
if (flags & LOAD_HDR) {
elf->e_phoff = 0;
elf->e_shoff = sizeof(Elf_Ehdr);
elf->e_phentsize = 0;
elf->e_phnum = 0;
elf->e_shstrndx = SHN_UNDEF;
BCOPY(elf, elfp, sizeof(*elf));
}
marks[MARK_START] = LOADADDR(minp);
marks[MARK_ENTRY] = LOADADDR(elf->e_entry);
/*
* Since there can be more than one symbol section in the code
* and we need to find strtab too in order to do anything
* useful with the symbols, we just pass the whole elf
* header back and we let the kernel debugger find the
* location and number of symbols by itself.
*/
marks[MARK_NSYM] = 1; /* XXX: Kernel needs >= 0 */
marks[MARK_SYM] = LOADADDR(elfp);
marks[MARK_END] = LOADADDR(maxp);
return 0;
}
#endif /* BOOT_ELF */
#ifdef BOOT_AOUT
static int
aout_exec(fd, x, marks, flags)
int fd;
struct exec *x;
u_long *marks;
int flags;
{
u_long entry = x->a_entry;
paddr_t aoutp = 0;
paddr_t minp, maxp;
int cc;
paddr_t offset = marks[MARK_START];
u_long magic = N_GETMAGIC(*x);
int sub;
/* In OMAGIC and NMAGIC, exec header isn't part of text segment */
if (magic == OMAGIC || magic == NMAGIC)
sub = 0;
else
sub = sizeof(*x);
minp = maxp = ALIGNENTRY(entry);
if (lseek(fd, sizeof(*x), SEEK_SET) == -1) {
WARN(("lseek text"));
return 1;
}
/*
* Leave a copy of the exec header before the text.
* The kernel may use this to verify that the
* symbols were loaded by this boot program.
*/
if (magic == OMAGIC || magic == NMAGIC) {
if (flags & LOAD_HDR && maxp >= sizeof(*x))
BCOPY(x, maxp - sizeof(*x), sizeof(*x));
}
else {
if (flags & LOAD_HDR)
BCOPY(x, maxp, sizeof(*x));
if (flags & (LOAD_HDR|COUNT_HDR))
maxp += sizeof(*x);
}
/*
* Read in the text segment.
*/
if (flags & LOAD_TEXT) {
PROGRESS(("%ld", x->a_text));
if (READ(fd, maxp, x->a_text - sub) != x->a_text - sub) {
WARN(("read text"));
return 1;
}
} else {
if (lseek(fd, x->a_text - sub, SEEK_CUR) == -1) {
WARN(("seek text"));
return 1;
}
}
if (flags & (LOAD_TEXT|COUNT_TEXT))
maxp += x->a_text - sub;
/*
* Provide alignment if required
*/
if (magic == ZMAGIC || magic == NMAGIC) {
int size = -(unsigned int)maxp & (__LDPGSZ - 1);
if (flags & LOAD_TEXTA) {
PROGRESS(("/%d", size));
BZERO(maxp, size);
}
if (flags & (LOAD_TEXTA|COUNT_TEXTA))
maxp += size;
}
/*
* Read in the data segment.
*/
if (flags & LOAD_DATA) {
PROGRESS(("+%ld", x->a_data));
if (READ(fd, maxp, x->a_data) != x->a_data) {
WARN(("read data"));
return 1;
}
}
else {
if (lseek(fd, x->a_data, SEEK_CUR) == -1) {
WARN(("seek data"));
return 1;
}
}
if (flags & (LOAD_DATA|COUNT_DATA))
maxp += x->a_data;
/*
* Zero out the BSS section.
* (Kernel doesn't care, but do it anyway.)
*/
if (flags & LOAD_BSS) {
PROGRESS(("+%ld", x->a_bss));
BZERO(maxp, x->a_bss);
}
if (flags & (LOAD_BSS|COUNT_BSS))
maxp += x->a_bss;
/*
* Read in the symbol table and strings.
* (Always set the symtab size word.)
*/
if (flags & LOAD_SYM)
BCOPY(&x->a_syms, maxp, sizeof(x->a_syms));
if (flags & (LOAD_SYM|COUNT_SYM)) {
maxp += sizeof(x->a_syms);
aoutp = maxp;
}
if (x->a_syms > 0) {
/* Symbol table and string table length word. */
if (flags & LOAD_SYM) {
PROGRESS(("+[%ld", x->a_syms));
if (READ(fd, maxp, x->a_syms) != x->a_syms) {
WARN(("read symbols"));
return 1;
}
} else {
if (lseek(fd, x->a_syms, SEEK_CUR) == -1) {
WARN(("seek symbols"));
return 1;
}
}
if (flags & (LOAD_SYM|COUNT_SYM))
maxp += x->a_syms;
if (read(fd, &cc, sizeof(cc)) != sizeof(cc)) {
WARN(("read string table"));
return 1;
}
if (flags & LOAD_SYM) {
BCOPY(&cc, maxp, sizeof(cc));
/* String table. Length word includes itself. */
PROGRESS(("+%d]", cc));
}
if (flags & (LOAD_SYM|COUNT_SYM))
maxp += sizeof(cc);
cc -= sizeof(int);
if (cc <= 0) {
WARN(("symbol table too short"));
return 1;
}
if (flags & LOAD_SYM) {
if (READ(fd, maxp, cc) != cc) {
WARN(("read strings"));
return 1;
}
} else {
if (lseek(fd, cc, SEEK_CUR) == -1) {
WARN(("seek strings"));
return 1;
}
}
if (flags & (LOAD_SYM|COUNT_SYM))
maxp += cc;
}
marks[MARK_START] = LOADADDR(minp);
marks[MARK_ENTRY] = LOADADDR(entry);
marks[MARK_NSYM] = x->a_syms;
marks[MARK_SYM] = LOADADDR(aoutp);
marks[MARK_END] = LOADADDR(maxp);
return 0;
}
#endif /* BOOT_AOUT */