NetBSD/sys/compat/irix/irix_exec_elf32.c

336 lines
8.4 KiB
C

/* $NetBSD: irix_exec_elf32.c,v 1.8 2003/08/06 01:04:44 manu Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Emmanuel Dreyfus.
*
* 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: irix_exec_elf32.c,v 1.8 2003/08/06 01:04:44 manu Exp $");
#ifndef ELFSIZE
#define ELFSIZE 32 /* XXX should die */
#endif
#include <sys/param.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/null.h>
#include <sys/malloc.h>
#include <sys/syslimits.h>
#include <sys/exec.h>
#include <sys/exec_elf.h>
#include <sys/errno.h>
#include <sys/namei.h> /* Used for irix_load_addr */
#include <sys/vnode.h> /* Used for irix_load_addr */
#include <machine/vmparam.h>
#include <uvm/uvm_extern.h>
#include <compat/common/compat_util.h>
#include <compat/irix/irix_exec.h>
static int irix_load_addr(struct proc *, char *, vaddr_t *);
/*
* IRIX o32 ABI probe function
*/
int
ELFNAME2(irix,probe_o32)(p, epp, eh, itp, pos)
struct proc *p;
struct exec_package *epp;
void *eh;
char *itp;
vaddr_t *pos;
{
int error;
#ifdef DEBUG_IRIX
printf("irix_probe_o32()\n");
#endif
if ((((Elf_Ehdr *)epp->ep_hdr)->e_flags & IRIX_EF_IRIX_ABI_MASK) !=
IRIX_EF_IRIX_ABIO32)
return error;
if (itp[0]) {
/* o32 binaries use /lib/libc.so.1 */
if (strncmp(itp, "/lib/libc.so", 12) &&
strncmp(itp, "/usr/lib/libc.so", 16))
return ENOEXEC;
if ((error = emul_find_interp(p, epp->ep_esch->es_emul->e_path,
itp)))
return error;
if ((error = irix_load_addr(p, itp, pos)) != 0)
return error;
} else {
*pos = ELF_NO_ADDR;
}
#ifdef DEBUG_IRIX
printf("irix_probe_o32: returning 0\n");
printf("epp->ep_vm_minaddr = 0x%lx\n", epp->ep_vm_minaddr);
#endif
epp->ep_vm_minaddr = epp->ep_vm_minaddr & ~0xfUL;
return 0;
}
/*
* IRIX n32 ABI probe function
*/
int
ELFNAME2(irix,probe_n32)(p, epp, eh, itp, pos)
struct proc *p;
struct exec_package *epp;
void *eh;
char *itp;
vaddr_t *pos;
{
int error;
#ifdef DEBUG_IRIX
printf("irix_probe_n32()\n");
#endif
if ((((Elf_Ehdr *)epp->ep_hdr)->e_flags & IRIX_EF_IRIX_ABI_MASK) !=
IRIX_EF_IRIX_ABIN32)
return error;
if (itp[0]) {
/* n32 binaries use /lib32/libc.so.1 */
if (strncmp(itp, "/lib32/libc.so", 14) &&
strncmp(itp, "/usr/lib32/libc.so", 18))
return ENOEXEC;
if ((error = emul_find_interp(p, epp->ep_esch->es_emul->e_path,
itp)))
return error;
}
*pos = ELF_NO_ADDR;
#ifdef DEBUG_IRIX
printf("irix_probe_n32: returning 0\n");
printf("epp->ep_vm_minaddr = 0x%lx\n", epp->ep_vm_minaddr);
#endif
epp->ep_vm_minaddr = epp->ep_vm_minaddr & ~0xfUL;
return 0;
}
int
ELFNAME2(irix,copyargs)(p, pack, arginfo, stackp, argp)
struct proc *p;
struct exec_package *pack;
struct ps_strings *arginfo;
char **stackp;
void *argp;
{
char **cpp, *dp, *sp;
size_t len;
void *nullp;
long argc, envc;
AuxInfo ai[IRIX_ELF_AUX_ENTRIES], *a;
struct elf_args *ap;
int error;
/*
* IRIX seems to expect argc and **argv to be aligned on a
* 16 bytes boundary. It seems there is no other way of
* getting **argv aligned than duplicating and customizing
* the code that sets up the stack in copyargs():
*/
#ifdef DEBUG_IRIX
printf("irix_elf32_copyargs(): *stackp = %p\n", *stackp);
#endif
/*
* This is borrowed from sys/kern/kern_exec.c:copyargs()
*/
cpp = (char **)*stackp;
nullp = NULL;
argc = arginfo->ps_nargvstr;
envc = arginfo->ps_nenvstr;
if ((error = copyout(&argc, cpp++, sizeof(argc))) != 0)
return error;
dp = (char *) (cpp + argc + envc + 2 + pack->ep_es->es_arglen);
/* Align **argv on a 16 bytes boundary */
dp = (char *)(((unsigned long)dp + 0xf) & ~0xfUL);
sp = argp;
arginfo->ps_argvstr = cpp; /* remember location of argv for later */
for (; --argc >= 0; sp += len, dp += len) {
#ifdef DEBUG_IRIX
printf("irix_elf32_copyargs(): argc = %d, cpp = %p, dp = %p\n", (int)argc, cpp, dp);
#endif
if ((error = copyout(&dp, cpp++, sizeof(dp))) != 0 ||
(error = copyoutstr(sp, dp, ARG_MAX, &len)) != 0)
return error;
}
if ((error = copyout(&nullp, cpp++, sizeof(nullp))) != 0)
return error;
arginfo->ps_envstr = cpp; /* remember location of envp for later */
for (; --envc >= 0; sp += len, dp += len)
if ((error = copyout(&dp, cpp++, sizeof(dp))) != 0 ||
(error = copyoutstr(sp, dp, ARG_MAX, &len)) != 0)
return error;
if ((error = copyout(&nullp, cpp++, sizeof(nullp))) != 0)
return error;
*stackp = (char *)cpp;
/*
* This is borrowed from sys/kern/exec_elf32.c:elf32_copyargs
*/
a = ai;
/*
* Push extra arguments on the stack needed by dynamically
* linked binaries
*/
if ((ap = (struct elf_args *)pack->ep_emul_arg)) {
a->a_type = AT_PHDR;
a->a_v = ap->arg_phaddr;
a++;
a->a_type = AT_PHENT;
a->a_v = ap->arg_phentsize;
a++;
a->a_type = AT_PHNUM;
a->a_v = ap->arg_phnum;
a++;
a->a_type = AT_ENTRY;
a->a_v = ap->arg_entry;
a++;
a->a_type = AT_BASE;
a->a_v = ap->arg_interp;
a++;
a->a_type = AT_PAGESZ;
a->a_v = PAGE_SIZE;
a++;
free((char *)ap, M_TEMP);
pack->ep_emul_arg = NULL;
}
a->a_type = AT_NULL;
a->a_v = 0;
a++;
len = (a - ai) * sizeof(AuxInfo);
if ((error = copyout(ai, *stackp, len)) != 0)
return error;
/* *stackp += len; */
#ifdef DEBUG_IRIX
printf("*stackp = %p\n", *stackp);
#endif
return 0;
}
/*
* Find the load address of the intepreter. Most of the code is
* borrowed from sys/kern/exec_elf32.c:load_file().
* There is nothing specific to IRIX here, it may move to
* sys/compat/compat_util.c if another emulation needs it.
*/
#define MAXPHNUM 50
static int
irix_load_addr(p, itp, pos)
struct proc *p;
char *itp;
vaddr_t *pos;
{
int error = 0;
int i;
struct nameidata nd;
struct vnode *vp;
Elf_Ehdr eh;
Elf_Phdr *ph = NULL;
u_long phsize;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, itp, p);
if ((error = namei(&nd)) != 0)
return ELFDEFNNAME(NO_ADDR);
vp = nd.ni_vp;
/* Check this is a regular file */
if (vp->v_type != VREG) {
VOP_UNLOCK(vp, 0);
error = EACCES;
goto bad;
}
VOP_UNLOCK(vp, 0);
if ((error = exec_read_from(p, vp, 0, &eh, sizeof(eh))) != 0)
goto bad;
if ((error = ELFNAME(check_header)(&eh, ET_DYN)) != 0)
goto bad;
if (eh.e_phnum > MAXPHNUM)
goto bad;
phsize = eh.e_phnum * sizeof(Elf_Phdr);
ph = (Elf_Phdr *)malloc(phsize, M_TEMP, M_WAITOK);
if ((error = exec_read_from(p, vp, eh.e_phoff, ph, phsize)) != 0)
goto bad;
/* Look for the first loadable section */
for (i = 0; i < eh.e_phnum; i++)
if (ph[i].p_type == PT_LOAD)
break;
if (i == eh.e_phnum) {
error = ENOEXEC;
goto bad;
}
*pos = ph[i].p_vaddr;
#ifdef DEBUG_IRIX
printf("irix_load_addr: file %s, addr %p\n", itp, (void *)*pos);
#endif
bad:
if (ph != NULL)
free(ph, M_TEMP);
vrele(vp);
return error;
}