/* $OpenBSD: exec.h,v 1.57 2025/05/24 06:49:16 deraadt Exp $ */ /* $NetBSD: exec.h,v 1.59 1996/02/09 18:25:09 christos Exp $ */ /*- * Copyright (c) 1994 Christopher G. Demetriou * Copyright (c) 1993 Theo de Raadt * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * 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. 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. * * @(#)exec.h 8.3 (Berkeley) 1/21/94 */ #ifndef _SYS_EXEC_H_ #define _SYS_EXEC_H_ /* * The following structure is found at the top of the user stack of each * user process. The ps program uses it to locate argv and environment * strings. Programs that wish ps to display other information may modify * it; normally ps_argvstr points to argv[0], and ps_nargvstr is the same * as the program's argc. The fields ps_envstr and ps_nenvstr are the * equivalent for the environment. */ struct ps_strings { char **ps_argvstr; /* first of 0 or more argument strings */ int ps_nargvstr; /* the number of argument strings */ char **ps_envstr; /* first of 0 or more environment strings */ int ps_nenvstr; /* the number of environment strings */ }; /* * the following structures allow execve() to put together processes * in a more extensible and cleaner way. * * the exec_package struct defines an executable being execve()'d. * it contains the header, the vmspace-building commands, the vnode * information, and the arguments associated with the newly-execve'd * process. * * the exec_vmcmd struct defines a command description to be used * in creating the new process's vmspace. */ struct proc; struct exec_package; typedef int (*exec_makecmds_fcn)(struct proc *, struct exec_package *); struct execsw { u_int es_hdrsz; /* size of header for this format */ exec_makecmds_fcn es_check; /* function to check exec format */ }; struct exec_vmcmd { int (*ev_proc)(struct proc *p, struct exec_vmcmd *cmd); /* procedure to run for region of vmspace */ u_long ev_len; /* length of the segment to map */ u_long ev_addr; /* address in the vmspace to place it at */ struct vnode *ev_vp; /* vnode pointer for the file w/the data */ u_long ev_offset; /* offset in the file for the data */ u_int ev_prot; /* protections for segment */ int ev_flags; #define VMCMD_RELATIVE 0x0001 /* ev_addr is relative to base entry */ #define VMCMD_BASE 0x0002 /* marks a base entry */ #define VMCMD_STACK 0x0004 /* create with UVM_FLAG_STACK */ #define VMCMD_IMMUTABLE 0x0010 /* create with UVM_ET_IMMUTABLE */ #define VMCMD_TEXTREL 0x0020 /* terrible binary contains terrible textrel */ }; #define EXEC_DEFAULT_VMCMD_SETSIZE 12 /* # of cmds in set to start */ /* exec vmspace-creation command set; see below */ struct exec_vmcmd_set { u_int evs_cnt; u_int evs_used; struct exec_vmcmd *evs_cmds; struct exec_vmcmd evs_start[EXEC_DEFAULT_VMCMD_SETSIZE]; }; struct elf_args; struct exec_package { char *ep_name; /* file's name */ void *ep_hdr; /* file's exec header */ u_int ep_hdrlen; /* length of ep_hdr */ u_int ep_hdrvalid; /* bytes of ep_hdr that are valid */ struct nameidata *ep_ndp; /* namei data pointer for lookups */ struct exec_vmcmd_set ep_vmcmds; /* vmcmds used to build vmspace */ struct vnode *ep_vp; /* executable's vnode */ struct vattr *ep_vap; /* executable's attributes */ u_long ep_taddr; /* process's text address */ u_long ep_tsize; /* size of process's text */ u_long ep_daddr; /* process's data(+bss) address */ u_long ep_dsize; /* size of process's data(+bss) */ u_long ep_maxsaddr; /* proc's max stack addr ("top") */ u_long ep_minsaddr; /* proc's min stack addr ("bottom") */ u_long ep_ssize; /* size of process's stack */ u_long ep_entry; /* process's entry point */ u_int ep_flags; /* flags; see below. */ char **ep_fa; /* a fake args vector for scripts */ int ep_fd; /* a file descriptor we're holding */ struct elf_args *ep_args; /* ELF info */ void *ep_auxinfo; /* userspace auxinfo address */ char *ep_interp; /* name of interpreter if any */ vaddr_t ep_pinstart, ep_pinend; /* executable region */ u_int *ep_pins; /* array of system call offsets */ int ep_npins; /* entries in array */ }; #define EXEC_INDIR 0x0001 /* script handling already done */ #define EXEC_HASFD 0x0002 /* holding a shell script */ #define EXEC_HASARGL 0x0004 /* has fake args vector */ #define EXEC_SKIPARG 0x0008 /* don't copy user-supplied argv[0] */ #define EXEC_DESTR 0x0010 /* destructive ops performed */ #define EXEC_WXNEEDED 0x0020 /* executable will violate W^X */ #define EXEC_NOBTCFI 0x0040 /* no branch target CFI */ #define EXEC_PROFILE 0x0080 /* profiled binary */ #ifdef _KERNEL /* * functions used either by execve() or the various cpu-dependent execve() * hooks. */ void vmcmdset_extend(struct exec_vmcmd_set *); void kill_vmcmds(struct exec_vmcmd_set *evsp); int vmcmd_map_pagedvn(struct proc *, struct exec_vmcmd *); int vmcmd_map_readvn(struct proc *, struct exec_vmcmd *); int vmcmd_map_zero(struct proc *, struct exec_vmcmd *); int vmcmd_mutable(struct proc *, struct exec_vmcmd *); int vmcmd_randomize(struct proc *, struct exec_vmcmd *); int copyargs(struct exec_package *, struct ps_strings *, void *, void *); void setregs(struct proc *, struct exec_package *, u_long, struct ps_strings *); int check_exec(struct proc *, struct exec_package *); int exec_setup_stack(struct proc *, struct exec_package *); int exec_process_vmcmds(struct proc *, struct exec_package *); void new_vmcmd(struct exec_vmcmd_set *evsp, int (*proc)(struct proc *p, struct exec_vmcmd *), u_long len, u_long addr, struct vnode *vp, u_long offset, u_int prot, int flags); #define NEW_VMCMD(evsp,proc,len,addr,vp,offset,prot) \ new_vmcmd(evsp,proc,len,addr,vp,offset,prot, 0); #define NEW_VMCMD2(evsp,proc,len,addr,vp,offset,prot,flags) \ new_vmcmd(evsp,proc,len,addr,vp,offset,prot,flags) /* Initialize an empty vmcmd set */ #define VMCMDSET_INIT(vmc) do { \ (vmc)->evs_cnt = EXEC_DEFAULT_VMCMD_SETSIZE; \ (vmc)->evs_cmds = (vmc)->evs_start; \ (vmc)->evs_used = 0; \ } while (0) /* * Exec function switch: * * Note that each makecmds function is responsible for loading the * exec package with the necessary functions for any exec-type-specific * handling. * * Functions for specific exec types should be defined in their own * header file. */ extern const struct execsw execsw[]; extern int nexecs; extern int exec_maxhdrsz; /* * If non-zero, stackgap_random specifies the upper limit of the random gap size * added to the fixed stack position. Must be n^2. */ extern int stackgap_random; /* Limit on total PT_OPENBSD_RANDOMIZE bytes. */ #define ELF_RANDOMIZE_LIMIT 1024*1024 #endif /* _KERNEL */ /* * a_mid - keep sorted in numerical order for sanity's sake * ensure that: 0 < mid < 0x3ff */ #define MID_ZERO 0 /* unknown - implementation dependent */ #define MID_SUN010 1 /* sun 68010/68020 binary */ #define MID_SUN020 2 /* sun 68020-only binary */ #define MID_PC386 100 /* 386 PC binary. (so quoth BFD) */ #define MID_ROMPAOS 104 /* old IBM RT */ #define MID_I386 134 /* i386 BSD binary */ #define MID_M68K 135 /* m68k BSD binary with 8K page sizes */ #define MID_M68K4K 136 /* DO NOT USE: m68k BSD binary with 4K page sizes */ #define MID_NS32532 137 /* ns32532 */ #define MID_SPARC 138 /* sparc */ #define MID_PMAX 139 /* pmax */ #define MID_VAX1K 140 /* vax 1k page size */ #define MID_ALPHA 141 /* Alpha BSD binary */ #define MID_MIPS 142 /* big-endian MIPS */ #define MID_ARM6 143 /* ARM6 */ #define MID_SH3 145 /* SH3 */ #define MID_POWERPC 149 /* big-endian PowerPC */ #define MID_VAX 150 /* vax */ #define MID_SPARC64 151 /* LP64 sparc */ #define MID_MIPS2 152 /* MIPS2 */ #define MID_M88K 153 /* m88k BSD binary */ #define MID_HPPA 154 /* hppa */ #define MID_AMD64 157 /* AMD64 */ #define MID_MIPS64 158 /* big-endian MIPS64 */ #define MID_ARM64 159 /* ARM64 */ #define MID_POWERPC64 160 /* big-endian 64-bit PowerPC */ #define MID_RISCV64 161 /* Little-endian 64-bit RISC-V */ #define MID_HP200 200 /* hp200 (68010) BSD binary */ #define MID_HP300 300 /* hp300 (68020+68881) BSD binary */ #define MID_HPUX 0x20C /* hp200/300 HP-UX binary */ #define MID_HPUX800 0x20B /* hp800 HP-UX binary pa1.0 */ #define MID_HPPA11 0x210 /* hp700 HP-UX binary pa1.1 */ #define MID_HPPA20 0x214 /* hp700 HP-UX binary pa2.0 */ #include <machine/exec.h> #endif /* !_SYS_EXEC_H_ */
