The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/imgact.h

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    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: releng/11.1/sys/sys/imgact.h 300792 2016-05-26 23:18:54Z 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         struct filedesc *fdp;   /* new file descriptor table */
   55 };
   56 
   57 struct image_params {
   58         struct proc *proc;      /* our process struct */
   59         struct label *execlabel;        /* optional exec label */
   60         struct vnode *vp;       /* pointer to vnode of file to exec */
   61         struct vm_object *object;       /* The vm object for this vp */
   62         struct vattr *attr;     /* attributes of file */
   63         const char *image_header; /* head of file to exec */
   64         unsigned long entry_addr; /* entry address of target executable */
   65         unsigned long reloc_base; /* load address of image */
   66         char vmspace_destroyed; /* flag - we've blown away original vm space */
   67 #define IMGACT_SHELL    0x1
   68 #define IMGACT_BINMISC  0x2
   69         unsigned char interpreted;      /* mask of interpreters that have run */
   70         char opened;            /* flag - we have opened executable vnode */
   71         char *interpreter_name; /* name of the interpreter */
   72         void *auxargs;          /* ELF Auxinfo structure pointer */
   73         struct sf_buf *firstpage;       /* first page that we mapped */
   74         unsigned long ps_strings; /* PS_STRINGS for BSD/OS binaries */
   75         size_t auxarg_size;
   76         struct image_args *args;        /* system call arguments */
   77         struct sysentvec *sysent;       /* system entry vector */
   78         char *execpath;
   79         unsigned long execpathp;
   80         char *freepath;
   81         unsigned long canary;
   82         int canarylen;
   83         unsigned long pagesizes;
   84         int pagesizeslen;
   85         vm_prot_t stack_prot;
   86         u_long stack_sz;
   87         struct ucred *newcred;          /* new credentials if changing */
   88         bool credential_setid;          /* true if becoming setid */
   89 };
   90 
   91 #ifdef _KERNEL
   92 struct sysentvec;
   93 struct thread;
   94 struct vmspace;
   95 
   96 #define IMGACT_CORE_COMPRESS    0x01
   97 
   98 int     exec_alloc_args(struct image_args *);
   99 int     exec_check_permissions(struct image_params *);
  100 register_t *exec_copyout_strings(struct image_params *);
  101 void    exec_free_args(struct image_args *);
  102 int     exec_new_vmspace(struct image_params *, struct sysentvec *);
  103 void    exec_setregs(struct thread *, struct image_params *, u_long);
  104 int     exec_shell_imgact(struct image_params *);
  105 int     exec_copyin_args(struct image_args *, char *, enum uio_seg,
  106         char **, char **);
  107 int     exec_copyin_data_fds(struct thread *, struct image_args *, const void *,
  108         size_t, const int *, size_t);
  109 int     pre_execve(struct thread *td, struct vmspace **oldvmspace);
  110 void    post_execve(struct thread *td, int error, struct vmspace *oldvmspace);
  111 #endif
  112 
  113 #endif /* !_SYS_IMGACT_H_ */

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