/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1993, David Greenman * All rights reserved. * * 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 AUTHOR 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. */ #ifndef _SYS_IMGACT_H_ #define _SYS_IMGACT_H_ #include <sys/_uio.h> #include <vm/vm.h> #define MAXSHELLCMDLEN PAGE_SIZE struct ucred; struct image_args { char *buf; /* pointer to string buffer */ void *bufkva; /* cookie for string buffer KVA */ char *begin_argv; /* beginning of argv in buf */ char *begin_envv; /* (interal use only) beginning of envv in buf, * access with exec_args_get_begin_envv(). */ char *endp; /* current `end' pointer of arg & env strings */ char *fname; /* pointer to filename of executable (system space) */ char *fname_buf; /* pointer to optional malloc(M_TEMP) buffer */ int stringspace; /* space left in arg & env buffer */ int argc; /* count of argument strings */ int envc; /* count of environment strings */ int fd; /* file descriptor of the executable */ }; struct image_params { struct proc *proc; /* our process */ struct thread *td; struct label *execlabel; /* optional exec label */ struct vnode *vp; /* pointer to vnode of file to exec */ struct vm_object *object; /* The vm object for this vp */ struct vattr *attr; /* attributes of file */ const char *image_header; /* header of file to exec */ unsigned long entry_addr; /* entry address of target executable */ unsigned long reloc_base; /* load address of image */ unsigned long et_dyn_addr; /* PIE load base */ char *interpreter_name; /* name of the interpreter */ void *auxargs; /* ELF Auxinfo structure pointer */ struct sf_buf *firstpage; /* first page that we mapped */ void *ps_strings; /* pointer to ps_string (user space) */ struct image_args *args; /* system call arguments */ struct sysentvec *sysent; /* system entry vector */ void *argv; /* pointer to argv (user space) */ void *envv; /* pointer to envv (user space) */ char *execpath; void *execpathp; char *freepath; void *canary; int canarylen; void *pagesizes; int pagesizeslen; vm_prot_t stack_prot; u_long stack_sz; struct ucred *newcred; /* new credentials if changing */ #define IMGACT_SHELL 0x1 #define IMGACT_BINMISC 0x2 #define IMGACT_INTERP_ELF 0x4 /* only used within the ELF activator */ unsigned char interpreted; /* mask of interpreters that have run */ bool credential_setid; /* true if becoming setid */ bool vmspace_destroyed; /* we've blown away original vm space */ bool opened; /* we have opened executable vnode */ bool textset; u_int map_flags; #define IMGP_ASLR_SHARED_PAGE 0x1 uint32_t imgp_flags; struct vnode *interpreter_vp; /* vnode of the interpreter */ }; #ifdef _KERNEL struct sysentvec; struct thread; struct vmspace; int exec_alloc_args(struct image_args *); int exec_args_add_arg(struct image_args *args, const char *argp, enum uio_seg segflg); int exec_args_add_env(struct image_args *args, const char *envp, enum uio_seg segflg); int exec_args_add_fname(struct image_args *args, const char *fname, enum uio_seg segflg); int exec_args_adjust_args(struct image_args *args, size_t consume, ssize_t extend); char *exec_args_get_begin_envv(struct image_args *args); int exec_check_permissions(struct image_params *); void exec_cleanup(struct thread *td, struct vmspace *); int exec_copyout_strings(struct image_params *, uintptr_t *); void exec_free_args(struct image_args *); int exec_map_stack(struct image_params *); int exec_new_vmspace(struct image_params *, struct sysentvec *); void exec_setregs(struct thread *, struct image_params *, uintptr_t); int exec_shell_imgact(struct image_params *); int exec_copyin_args(struct image_args *, const char *, char **, char **); int pre_execve(struct thread *td, struct vmspace **oldvmspace); void post_execve(struct thread *td, int error, struct vmspace *oldvmspace); bool execve_block(struct thread *td, struct proc *p); void execve_block_wait(struct thread *td, struct proc *p); void execve_unblock(struct thread *td, struct proc *p); void execve_block_pass(struct thread *td); #endif #endif /* !_SYS_IMGACT_H_ */
