218 lines
8.4 KiB
C
218 lines
8.4 KiB
C
/* $NetBSD: exec.h,v 1.65 1997/09/11 23:02:35 mycroft Exp $ */
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/*-
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* Copyright (c) 1994 Christopher G. Demetriou
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* Copyright (c) 1993 Theo de Raadt
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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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 University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)exec.h 8.3 (Berkeley) 1/21/94
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*/
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#ifndef _SYS_EXEC_H_
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#define _SYS_EXEC_H_
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/*
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* The following structure is found at the top of the user stack of each
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* user process. The ps program uses it to locate argv and environment
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* strings. Programs that wish ps to display other information may modify
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* it; normally ps_argvstr points to argv[0], and ps_nargvstr is the same
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* as the program's argc. The fields ps_envstr and ps_nenvstr are the
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* equivalent for the environment.
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*/
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struct ps_strings {
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char **ps_argvstr; /* first of 0 or more argument strings */
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int ps_nargvstr; /* the number of argument strings */
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char **ps_envstr; /* first of 0 or more environment strings */
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int ps_nenvstr; /* the number of environment strings */
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};
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/*
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* Address of ps_strings structure. We only use this as a default in user
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* space; normal access is done through __ps_strings.
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*/
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#define PS_STRINGS \
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((struct ps_strings *)(USRSTACK - sizeof(struct ps_strings)))
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/*
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* Below the PS_STRINGS and sigtramp, we may require a gap on the stack
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* (used to copyin/copyout various emulation data structures).
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*/
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#if defined(COMPAT_SUNOS) || defined(COMPAT_ULTRIX) || \
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defined(COMPAT_IBCS2) || defined(COMPAT_SVR4) || defined(COMPAT_OSF1) || \
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defined(COMPAT_LINUX) || defined(COMPAT_FREEBSD) || defined(COMPAT_HPUX)
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#define STACKGAPLEN 400 /* plenty enough for now */
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#else
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#define STACKGAPLEN 0
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#endif
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#define STACKGAPBASE_UNALIGNED \
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((caddr_t)PS_STRINGS - szsigcode - STACKGAPLEN)
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#define STACKGAPBASE \
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((caddr_t)(((unsigned long) STACKGAPBASE_UNALIGNED) & ~ALIGNBYTES))
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/*
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* the following structures allow execve() to put together processes
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* in a more extensible and cleaner way.
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*
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* the exec_package struct defines an executable being execve()'d.
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* it contains the header, the vmspace-building commands, the vnode
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* information, and the arguments associated with the newly-execve'd
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* process.
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*
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* the exec_vmcmd struct defines a command description to be used
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* in creating the new process's vmspace.
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*/
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struct proc;
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struct exec_package;
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typedef int (*exec_makecmds_fcn) __P((struct proc *, struct exec_package *));
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struct execsw {
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u_int es_hdrsz; /* size of header for this format */
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exec_makecmds_fcn es_check; /* function to check exec format */
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};
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/* exec vmspace-creation command set; see below */
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struct exec_vmcmd_set {
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u_int evs_cnt;
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u_int evs_used;
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struct exec_vmcmd *evs_cmds;
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};
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#define EXEC_DEFAULT_VMCMD_SETSIZE 5 /* # of cmds in set to start */
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struct exec_package {
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const char *ep_name; /* file's name */
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void *ep_hdr; /* file's exec header */
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u_int ep_hdrlen; /* length of ep_hdr */
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u_int ep_hdrvalid; /* bytes of ep_hdr that are valid */
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struct nameidata *ep_ndp; /* namei data pointer for lookups */
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struct exec_vmcmd_set ep_vmcmds; /* vmcmds used to build vmspace */
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struct vnode *ep_vp; /* executable's vnode */
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struct vattr *ep_vap; /* executable's attributes */
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u_long ep_taddr; /* process's text address */
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u_long ep_tsize; /* size of process's text */
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u_long ep_daddr; /* process's data(+bss) address */
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u_long ep_dsize; /* size of process's data(+bss) */
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u_long ep_maxsaddr; /* proc's max stack addr ("top") */
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u_long ep_minsaddr; /* proc's min stack addr ("bottom") */
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u_long ep_ssize; /* size of process's stack */
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u_long ep_entry; /* process's entry point */
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u_int ep_flags; /* flags; see below. */
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char **ep_fa; /* a fake args vector for scripts */
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int ep_fd; /* a file descriptor we're holding */
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struct emul *ep_emul; /* os emulation */
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void *ep_emul_arg; /* emulation argument */
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};
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#define EXEC_INDIR 0x0001 /* script handling already done */
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#define EXEC_HASFD 0x0002 /* holding a shell script */
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#define EXEC_HASARGL 0x0004 /* has fake args vector */
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#define EXEC_SKIPARG 0x0008 /* don't copy user-supplied argv[0] */
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#define EXEC_DESTR 0x0010 /* destructive ops performed */
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struct exec_vmcmd {
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int (*ev_proc) __P((struct proc *p, struct exec_vmcmd *cmd));
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/* procedure to run for region of vmspace */
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u_long ev_len; /* length of the segment to map */
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u_long ev_addr; /* address in the vmspace to place it at */
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struct vnode *ev_vp; /* vnode pointer for the file w/the data */
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u_long ev_offset; /* offset in the file for the data */
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u_int ev_prot; /* protections for segment */
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};
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#ifdef _KERNEL
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/*
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* funtions used either by execve() or the various cpu-dependent execve()
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* hooks.
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*/
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void kill_vmcmd __P((struct exec_vmcmd **));
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int exec_makecmds __P((struct proc *, struct exec_package *));
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int exec_runcmds __P((struct proc *, struct exec_package *));
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void vmcmdset_extend __P((struct exec_vmcmd_set *));
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void kill_vmcmds __P((struct exec_vmcmd_set *evsp));
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int vmcmd_map_pagedvn __P((struct proc *, struct exec_vmcmd *));
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int vmcmd_map_readvn __P((struct proc *, struct exec_vmcmd *));
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int vmcmd_map_zero __P((struct proc *, struct exec_vmcmd *));
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void *copyargs __P((struct exec_package *, struct ps_strings *,
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void *, void *));
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void setregs __P((struct proc *, struct exec_package *,
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u_long));
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int check_exec __P((struct proc *, struct exec_package *));
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#ifdef DEBUG
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void new_vmcmd __P((struct exec_vmcmd_set *evsp,
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int (*proc) __P((struct proc *p, struct exec_vmcmd *)),
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u_long len, u_long addr, struct vnode *vp, u_long offset,
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u_int prot));
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#define NEW_VMCMD(evsp,proc,len,addr,vp,offset,prot) \
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new_vmcmd(evsp,proc,len,addr,vp,offset,prot);
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#else /* DEBUG */
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#define NEW_VMCMD(evsp,proc,len,addr,vp,offset,prot) { \
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struct exec_vmcmd *vcp; \
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if ((evsp)->evs_used >= (evsp)->evs_cnt) \
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vmcmdset_extend(evsp); \
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vcp = &(evsp)->evs_cmds[(evsp)->evs_used++]; \
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vcp->ev_proc = (proc); \
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vcp->ev_len = (len); \
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vcp->ev_addr = (addr); \
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if ((vcp->ev_vp = (vp)) != NULLVP) \
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VREF(vp); \
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vcp->ev_offset = (offset); \
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vcp->ev_prot = (prot); \
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}
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#endif /* EXEC_DEBUG */
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/*
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* Exec function switch:
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*
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* Note that each makecmds function is responsible for loading the
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* exec package with the necessary functions for any exec-type-specific
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* handling.
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*
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* Functions for specific exec types should be defined in their own
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* header file.
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*/
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extern struct execsw execsw[];
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extern int nexecs;
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extern int exec_maxhdrsz;
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#endif /* _KERNEL */
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#include <sys/exec_aout.h>
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#endif /* !_SYS_EXEC_H_ */
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