330 lines
10 KiB
C
330 lines
10 KiB
C
/* $NetBSD: linux_exec_aout.c,v 1.55 2003/08/08 18:57:06 christos Exp $ */
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/*-
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* Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas, Frank van der Linden and Eric Haszlakiewicz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* based on exec_aout.c, sunos_exec.c and svr4_exec.c
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: linux_exec_aout.c,v 1.55 2003/08/08 18:57:06 christos Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <sys/namei.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/exec.h>
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#include <sys/exec_elf.h>
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#include <sys/mman.h>
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#include <sys/sa.h>
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#include <sys/syscallargs.h>
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#include <machine/cpu.h>
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#include <machine/reg.h>
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#include <compat/linux/common/linux_types.h>
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#include <compat/linux/common/linux_signal.h>
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#include <compat/linux/common/linux_util.h>
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#include <compat/linux/common/linux_exec.h>
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#include <compat/linux/common/linux_machdep.h>
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#include <compat/linux/linux_syscallargs.h>
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#include <compat/linux/linux_syscall.h>
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int linux_aout_copyargs __P((struct proc *, struct exec_package *,
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struct ps_strings *, char **, void *));
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static int exec_linux_aout_prep_zmagic __P((struct proc *,
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struct exec_package *));
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static int exec_linux_aout_prep_nmagic __P((struct proc *,
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struct exec_package *));
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static int exec_linux_aout_prep_omagic __P((struct proc *,
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struct exec_package *));
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static int exec_linux_aout_prep_qmagic __P((struct proc *,
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struct exec_package *));
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int
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linux_aout_copyargs(p, pack, arginfo, stackp, argp)
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struct proc *p;
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struct exec_package *pack;
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struct ps_strings *arginfo;
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char **stackp;
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void *argp;
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{
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char **cpp = (char **)*stackp;
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char **stk = (char **)*stackp;
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char *dp, *sp;
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size_t len;
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void *nullp = NULL;
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int argc = arginfo->ps_nargvstr;
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int envc = arginfo->ps_nenvstr;
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int error;
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if ((error = copyout(&argc, cpp++, sizeof(argc))) != 0)
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return error;
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/* leave room for envp and argv */
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cpp += 2;
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if ((error = copyout(&cpp, &stk[1], sizeof (cpp))) != 0)
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return error;
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dp = (char *) (cpp + argc + envc + 2);
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sp = argp;
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/* XXX don't copy them out, remap them! */
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arginfo->ps_argvstr = cpp; /* remember location of argv for later */
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for (; --argc >= 0; sp += len, dp += len)
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if ((error = copyout(&dp, cpp++, sizeof(dp))) != 0 ||
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(error = copyoutstr(sp, dp, ARG_MAX, &len)) != 0)
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return error;
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if ((error = copyout(&nullp, cpp++, sizeof(nullp))) != 0)
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return error;
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if ((error = copyout(&cpp, &stk[2], sizeof (cpp))) != 0)
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return error;
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arginfo->ps_envstr = cpp; /* remember location of envp for later */
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for (; --envc >= 0; sp += len, dp += len)
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if ((error = copyout(&dp, cpp++, sizeof(dp))) != 0 ||
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(error = copyoutstr(sp, dp, ARG_MAX, &len)) != 0)
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return error;
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if ((error = copyout(&nullp, cpp++, sizeof(nullp))) != 0)
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return error;
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*stackp = (char *)cpp;
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return 0;
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}
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int
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exec_linux_aout_makecmds(p, epp)
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struct proc *p;
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struct exec_package *epp;
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{
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struct exec *linux_ep = epp->ep_hdr;
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int machtype, magic;
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int error = ENOEXEC;
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magic = LINUX_N_MAGIC(linux_ep);
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machtype = LINUX_N_MACHTYPE(linux_ep);
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if (machtype != LINUX_MID_MACHINE)
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return (ENOEXEC);
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switch (magic) {
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case QMAGIC:
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error = exec_linux_aout_prep_qmagic(p, epp);
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break;
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case ZMAGIC:
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error = exec_linux_aout_prep_zmagic(p, epp);
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break;
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case NMAGIC:
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error = exec_linux_aout_prep_nmagic(p, epp);
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break;
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case OMAGIC:
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error = exec_linux_aout_prep_omagic(p, epp);
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break;
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}
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return error;
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}
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/*
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* Since text starts at 0x400 in Linux ZMAGIC executables, and 0x400
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* is very likely not page aligned on most architectures, it is treated
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* as an NMAGIC here. XXX
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*/
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static int
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exec_linux_aout_prep_zmagic(p, epp)
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struct proc *p;
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struct exec_package *epp;
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{
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struct exec *execp = epp->ep_hdr;
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epp->ep_taddr = LINUX_N_TXTADDR(*execp, ZMAGIC);
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epp->ep_tsize = execp->a_text;
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epp->ep_daddr = LINUX_N_DATADDR(*execp, ZMAGIC);
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epp->ep_dsize = execp->a_data + execp->a_bss;
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epp->ep_entry = execp->a_entry;
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/* set up command for text segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text,
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epp->ep_taddr, epp->ep_vp, LINUX_N_TXTOFF(*execp, ZMAGIC),
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VM_PROT_READ|VM_PROT_EXECUTE);
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/* set up command for data segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data,
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epp->ep_daddr, epp->ep_vp, LINUX_N_DATOFF(*execp, ZMAGIC),
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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/* set up command for bss segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss,
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epp->ep_daddr + execp->a_data, NULLVP, 0,
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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return (*epp->ep_esch->es_setup_stack)(p, epp);
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}
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/*
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* exec_aout_prep_nmagic(): Prepare Linux NMAGIC package.
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* Not different from the normal stuff.
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*/
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static int
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exec_linux_aout_prep_nmagic(p, epp)
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struct proc *p;
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struct exec_package *epp;
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{
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struct exec *execp = epp->ep_hdr;
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long bsize, baddr;
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epp->ep_taddr = LINUX_N_TXTADDR(*execp, NMAGIC);
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epp->ep_tsize = execp->a_text;
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epp->ep_daddr = LINUX_N_DATADDR(*execp, NMAGIC);
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epp->ep_dsize = execp->a_data + execp->a_bss;
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epp->ep_entry = execp->a_entry;
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/* set up command for text segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text,
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epp->ep_taddr, epp->ep_vp, LINUX_N_TXTOFF(*execp, NMAGIC),
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VM_PROT_READ|VM_PROT_EXECUTE);
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/* set up command for data segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data,
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epp->ep_daddr, epp->ep_vp, LINUX_N_DATOFF(*execp, NMAGIC),
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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/* set up command for bss segment */
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baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE);
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bsize = epp->ep_daddr + epp->ep_dsize - baddr;
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if (bsize > 0)
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
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NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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return (*epp->ep_esch->es_setup_stack)(p, epp);
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}
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/*
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* exec_aout_prep_omagic(): Prepare Linux OMAGIC package.
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* Business as usual.
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*/
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static int
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exec_linux_aout_prep_omagic(p, epp)
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struct proc *p;
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struct exec_package *epp;
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{
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struct exec *execp = epp->ep_hdr;
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long dsize, bsize, baddr;
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epp->ep_taddr = LINUX_N_TXTADDR(*execp, OMAGIC);
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epp->ep_tsize = execp->a_text;
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epp->ep_daddr = LINUX_N_DATADDR(*execp, OMAGIC);
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epp->ep_dsize = execp->a_data + execp->a_bss;
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epp->ep_entry = execp->a_entry;
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/* set up command for text and data segments */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
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execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp,
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LINUX_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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/* set up command for bss segment */
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baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE);
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bsize = epp->ep_daddr + epp->ep_dsize - baddr;
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if (bsize > 0)
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
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NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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/*
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* Make sure (# of pages) mapped above equals (vm_tsize + vm_dsize);
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* obreak(2) relies on this fact. Both `vm_tsize' and `vm_dsize' are
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* computed (in execve(2)) by rounding *up* `ep_tsize' and `ep_dsize'
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* respectively to page boundaries.
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* Compensate `ep_dsize' for the amount of data covered by the last
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* text page.
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*/
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dsize = epp->ep_dsize + execp->a_text - roundup(execp->a_text,
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PAGE_SIZE);
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epp->ep_dsize = (dsize > 0) ? dsize : 0;
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return (*epp->ep_esch->es_setup_stack)(p, epp);
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}
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static int
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exec_linux_aout_prep_qmagic(p, epp)
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struct proc *p;
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struct exec_package *epp;
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{
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struct exec *execp = epp->ep_hdr;
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int error;
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epp->ep_taddr = LINUX_N_TXTADDR(*execp, QMAGIC);
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epp->ep_tsize = execp->a_text;
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epp->ep_daddr = LINUX_N_DATADDR(*execp, QMAGIC);
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epp->ep_dsize = execp->a_data + execp->a_bss;
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epp->ep_entry = execp->a_entry;
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error = vn_marktext(epp->ep_vp);
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if (error)
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return (error);
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/* set up command for text segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text,
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epp->ep_taddr, epp->ep_vp, LINUX_N_TXTOFF(*execp, QMAGIC),
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VM_PROT_READ|VM_PROT_EXECUTE);
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/* set up command for data segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data,
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epp->ep_daddr, epp->ep_vp, LINUX_N_DATOFF(*execp, QMAGIC),
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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/* set up command for bss segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss,
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epp->ep_daddr + execp->a_data, NULLVP, 0,
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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return (*epp->ep_esch->es_setup_stack)(p, epp);
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}
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