6297a3d843
setting SV_SHP flag and providing pointer to the vm object and mapping address. Provide simple allocator to carve space in the page, tailored to put the code with alignment restrictions. Enable shared page use for amd64, both native and 32bit FreeBSD binaries. Page is private mapped at the top of the user address space, moving a start of the stack one page down. Move signal trampoline code from the top of the stack to the shared page. Reviewed by: alc
101 lines
3.9 KiB
C
101 lines
3.9 KiB
C
/*-
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* Copyright (c) 1993, David Greenman
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* All rights reserved.
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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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* 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 AUTHOR 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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* $FreeBSD$
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*/
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#ifndef _SYS_IMGACT_H_
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#define _SYS_IMGACT_H_
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#include <sys/uio.h>
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#include <vm/vm.h>
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#define MAXSHELLCMDLEN PAGE_SIZE
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struct image_args {
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char *buf; /* pointer to string buffer */
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char *begin_argv; /* beginning of argv in buf */
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char *begin_envv; /* beginning of envv in buf */
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char *endp; /* current `end' pointer of arg & env strings */
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char *fname; /* pointer to filename of executable (system space) */
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char *fname_buf; /* pointer to optional malloc(M_TEMP) buffer */
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int stringspace; /* space left in arg & env buffer */
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int argc; /* count of argument strings */
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int envc; /* count of environment strings */
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int fd; /* file descriptor of the executable */
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};
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struct image_params {
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struct proc *proc; /* our process struct */
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struct label *execlabel; /* optional exec label */
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struct vnode *vp; /* pointer to vnode of file to exec */
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struct vm_object *object; /* The vm object for this vp */
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struct vattr *attr; /* attributes of file */
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const char *image_header; /* head of file to exec */
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unsigned long entry_addr; /* entry address of target executable */
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unsigned long reloc_base; /* load address of image */
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char vmspace_destroyed; /* flag - we've blown away original vm space */
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char interpreted; /* flag - this executable is interpreted */
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char opened; /* flag - we have opened executable vnode */
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char *interpreter_name; /* name of the interpreter */
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void *auxargs; /* ELF Auxinfo structure pointer */
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struct sf_buf *firstpage; /* first page that we mapped */
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unsigned long ps_strings; /* PS_STRINGS for BSD/OS binaries */
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size_t auxarg_size;
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struct image_args *args; /* system call arguments */
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struct sysentvec *sysent; /* system entry vector */
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char *execpath;
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unsigned long execpathp;
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char *freepath;
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unsigned long canary;
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int canarylen;
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unsigned long pagesizes;
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int pagesizeslen;
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vm_prot_t stack_prot;
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};
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#ifdef _KERNEL
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struct sysentvec;
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struct thread;
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#define IMGACT_CORE_COMPRESS 0x01
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int exec_alloc_args(struct image_args *);
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int exec_check_permissions(struct image_params *);
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register_t *exec_copyout_strings(struct image_params *);
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void exec_free_args(struct image_args *);
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int exec_new_vmspace(struct image_params *, struct sysentvec *);
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void exec_setregs(struct thread *, struct image_params *, u_long);
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int exec_shell_imgact(struct image_params *);
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int exec_copyin_args(struct image_args *, char *, enum uio_seg,
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char **, char **);
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#endif
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#endif /* !_SYS_IMGACT_H_ */
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