1 /*- 2 * Copyright (c) 1993, David Greenman 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: stable/10/sys/sys/imgact.h 302238 2016-06-27 22:12:11Z bdrewery $ 30 */ 31 32 #ifndef _SYS_IMGACT_H_ 33 #define _SYS_IMGACT_H_ 34 35 #include <sys/uio.h> 36 37 #include <vm/vm.h> 38 39 #define MAXSHELLCMDLEN PAGE_SIZE 40 41 struct ucred; 42 43 struct image_args { 44 char *buf; /* pointer to string buffer */ 45 char *begin_argv; /* beginning of argv in buf */ 46 char *begin_envv; /* beginning of envv in buf */ 47 char *endp; /* current `end' pointer of arg & env strings */ 48 char *fname; /* pointer to filename of executable (system space) */ 49 char *fname_buf; /* pointer to optional malloc(M_TEMP) buffer */ 50 int stringspace; /* space left in arg & env buffer */ 51 int argc; /* count of argument strings */ 52 int envc; /* count of environment strings */ 53 int fd; /* file descriptor of the executable */ 54 }; 55 56 struct image_params { 57 struct proc *proc; /* our process struct */ 58 struct label *execlabel; /* optional exec label */ 59 struct vnode *vp; /* pointer to vnode of file to exec */ 60 struct vm_object *object; /* The vm object for this vp */ 61 struct vattr *attr; /* attributes of file */ 62 const char *image_header; /* head of file to exec */ 63 unsigned long entry_addr; /* entry address of target executable */ 64 unsigned long reloc_base; /* load address of image */ 65 char vmspace_destroyed; /* flag - we've blown away original vm space */ 66 #define IMGACT_SHELL 0x1 67 #define IMGACT_BINMISC 0x2 68 unsigned char interpreted; /* mask of interpreters that have run */ 69 char opened; /* flag - we have opened executable vnode */ 70 char *interpreter_name; /* name of the interpreter */ 71 void *auxargs; /* ELF Auxinfo structure pointer */ 72 struct sf_buf *firstpage; /* first page that we mapped */ 73 unsigned long ps_strings; /* PS_STRINGS for BSD/OS binaries */ 74 size_t auxarg_size; 75 struct image_args *args; /* system call arguments */ 76 struct sysentvec *sysent; /* system entry vector */ 77 char *execpath; 78 unsigned long execpathp; 79 char *freepath; 80 unsigned long canary; 81 int canarylen; 82 unsigned long pagesizes; 83 int pagesizeslen; 84 vm_prot_t stack_prot; 85 u_long stack_sz; 86 struct ucred *newcred; /* new credentials if changing */ 87 bool credential_setid; /* true if becoming setid */ 88 }; 89 90 #ifdef _KERNEL 91 struct sysentvec; 92 struct thread; 93 struct vmspace; 94 95 #define IMGACT_CORE_COMPRESS 0x01 96 97 int exec_alloc_args(struct image_args *); 98 int exec_check_permissions(struct image_params *); 99 register_t *exec_copyout_strings(struct image_params *); 100 void exec_free_args(struct image_args *); 101 int exec_new_vmspace(struct image_params *, struct sysentvec *); 102 void exec_setregs(struct thread *, struct image_params *, u_long); 103 int exec_shell_imgact(struct image_params *); 104 int exec_copyin_args(struct image_args *, char *, enum uio_seg, 105 char **, char **); 106 int pre_execve(struct thread *td, struct vmspace **oldvmspace); 107 void post_execve(struct thread *td, int error, struct vmspace *oldvmspace); 108 #endif 109 110 #endif /* !_SYS_IMGACT_H_ */ 111