6ec52cf8be
other "system" header files. Also help the deprecation of lockmgr.h by making it a sub-include of sys/lock.h and removing sys/lockmgr.h form kernel .c files. Sort sys/*.h includes where possible in affected files. OK'ed by: bde (with reservations)
280 lines
7.2 KiB
C
280 lines
7.2 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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*
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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 AUTHOR 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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#include <sys/param.h>
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#include <sys/exec.h>
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#include <sys/fcntl.h>
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#include <sys/imgact.h>
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#include <sys/imgact_aout.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/namei.h>
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#include <sys/pioctl.h>
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#include <sys/proc.h>
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#include <sys/resourcevar.h>
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#include <sys/systm.h>
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#include <sys/signalvar.h>
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#include <sys/stat.h>
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#include <sys/sysent.h>
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#include <sys/syscall.h>
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#include <sys/vnode.h>
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#include <sys/user.h>
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#include <machine/md_var.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <vm/vm_object.h>
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static int exec_aout_imgact __P((struct image_params *imgp));
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struct sysentvec aout_sysvec = {
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SYS_MAXSYSCALL,
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sysent,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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sendsig,
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sigcode,
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&szsigcode,
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0,
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"FreeBSD a.out",
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aout_coredump,
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NULL,
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MINSIGSTKSZ
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};
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static int
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exec_aout_imgact(imgp)
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struct image_params *imgp;
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{
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const struct exec *a_out = (const struct exec *) imgp->image_header;
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struct vmspace *vmspace;
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struct vnode *vp;
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vm_map_t map;
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vm_object_t object;
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vm_offset_t text_end, data_end;
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unsigned long virtual_offset;
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unsigned long file_offset;
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unsigned long bss_size;
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int error;
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/*
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* Linux and *BSD binaries look very much alike,
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* only the machine id is different:
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* 0x64 for Linux, 0x86 for *BSD, 0x00 for BSDI.
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* NetBSD is in network byte order.. ugh.
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*/
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if (((a_out->a_magic >> 16) & 0xff) != 0x86 &&
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((a_out->a_magic >> 16) & 0xff) != 0 &&
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((((int)ntohl(a_out->a_magic)) >> 16) & 0xff) != 0x86)
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return -1;
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/*
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* Set file/virtual offset based on a.out variant.
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* We do two cases: host byte order and network byte order
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* (for NetBSD compatibility)
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*/
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switch ((int)(a_out->a_magic & 0xffff)) {
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case ZMAGIC:
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virtual_offset = 0;
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if (a_out->a_text) {
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file_offset = PAGE_SIZE;
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} else {
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/* Bill's "screwball mode" */
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file_offset = 0;
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}
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break;
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case QMAGIC:
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virtual_offset = PAGE_SIZE;
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file_offset = 0;
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/* Pass PS_STRINGS for BSD/OS binaries only. */
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if (N_GETMID(*a_out) == MID_ZERO)
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imgp->ps_strings = PS_STRINGS;
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break;
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default:
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/* NetBSD compatibility */
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switch ((int)(ntohl(a_out->a_magic) & 0xffff)) {
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case ZMAGIC:
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case QMAGIC:
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virtual_offset = PAGE_SIZE;
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file_offset = 0;
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break;
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default:
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return (-1);
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}
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}
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bss_size = roundup(a_out->a_bss, PAGE_SIZE);
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/*
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* Check various fields in header for validity/bounds.
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*/
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if (/* entry point must lay with text region */
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a_out->a_entry < virtual_offset ||
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a_out->a_entry >= virtual_offset + a_out->a_text ||
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/* text and data size must each be page rounded */
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a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK)
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return (-1);
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/* text + data can't exceed file size */
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if (a_out->a_data + a_out->a_text > imgp->attr->va_size)
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return (EFAULT);
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/*
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* text/data/bss must not exceed limits
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*/
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mtx_assert(&Giant, MA_OWNED);
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if (/* text can't exceed maximum text size */
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a_out->a_text > MAXTSIZ ||
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/* data + bss can't exceed rlimit */
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a_out->a_data + bss_size >
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imgp->proc->p_rlimit[RLIMIT_DATA].rlim_cur)
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return (ENOMEM);
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/* copy in arguments and/or environment from old process */
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error = exec_extract_strings(imgp);
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if (error)
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return (error);
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/*
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* Destroy old process VM and create a new one (with a new stack)
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*/
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exec_new_vmspace(imgp);
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/*
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* The vm space can be changed by exec_new_vmspace
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*/
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vmspace = imgp->proc->p_vmspace;
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vp = imgp->vp;
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map = &vmspace->vm_map;
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vm_map_lock(map);
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VOP_GETVOBJECT(vp, &object);
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vm_object_reference(object);
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text_end = virtual_offset + a_out->a_text;
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error = vm_map_insert(map, object,
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file_offset,
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virtual_offset, text_end,
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VM_PROT_READ | VM_PROT_EXECUTE, VM_PROT_ALL,
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MAP_COPY_ON_WRITE | MAP_PREFAULT);
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if (error) {
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vm_map_unlock(map);
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return (error);
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}
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data_end = text_end + a_out->a_data;
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if (a_out->a_data) {
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vm_object_reference(object);
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error = vm_map_insert(map, object,
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file_offset + a_out->a_text,
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text_end, data_end,
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VM_PROT_ALL, VM_PROT_ALL,
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MAP_COPY_ON_WRITE | MAP_PREFAULT);
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if (error) {
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vm_map_unlock(map);
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return (error);
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}
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}
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if (bss_size) {
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error = vm_map_insert(map, NULL, 0,
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data_end, data_end + bss_size,
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VM_PROT_ALL, VM_PROT_ALL, 0);
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if (error) {
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vm_map_unlock(map);
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return (error);
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}
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}
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vm_map_unlock(map);
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/* Fill in process VM information */
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vmspace->vm_tsize = a_out->a_text >> PAGE_SHIFT;
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vmspace->vm_dsize = (a_out->a_data + bss_size) >> PAGE_SHIFT;
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vmspace->vm_taddr = (caddr_t) (uintptr_t) virtual_offset;
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vmspace->vm_daddr = (caddr_t) (uintptr_t)
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(virtual_offset + a_out->a_text);
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/* Fill in image_params */
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imgp->interpreted = 0;
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imgp->entry_addr = a_out->a_entry;
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imgp->proc->p_sysent = &aout_sysvec;
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/* Indicate that this file should not be modified */
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imgp->vp->v_flag |= VTEXT;
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return (0);
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}
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/*
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* Dump core, into a file named as described in the comments for
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* expand_name(), unless the process was setuid/setgid.
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*/
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int
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aout_coredump(p, vp, limit)
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register struct proc *p;
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register struct vnode *vp;
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off_t limit;
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{
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register struct ucred *cred = p->p_ucred;
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register struct vmspace *vm = p->p_vmspace;
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int error;
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if (ctob(UPAGES + vm->vm_dsize + vm->vm_ssize) >= limit)
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return (EFAULT);
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fill_kinfo_proc(p, &p->p_addr->u_kproc);
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error = cpu_coredump(p, vp, cred);
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if (error == 0)
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error = vn_rdwr(UIO_WRITE, vp, vm->vm_daddr,
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(int)ctob(vm->vm_dsize), (off_t)ctob(UPAGES), UIO_USERSPACE,
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IO_NODELOCKED|IO_UNIT, cred, (int *) NULL, p);
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if (error == 0)
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error = vn_rdwr(UIO_WRITE, vp,
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(caddr_t) trunc_page(USRSTACK - ctob(vm->vm_ssize)),
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round_page(ctob(vm->vm_ssize)),
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(off_t)ctob(UPAGES) + ctob(vm->vm_dsize), UIO_USERSPACE,
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IO_NODELOCKED|IO_UNIT, cred, (int *) NULL, p);
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return (error);
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}
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/*
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* Tell kern_execve.c about it, with a little help from the linker.
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*/
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static struct execsw aout_execsw = { exec_aout_imgact, "a.out" };
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EXEC_SET(aout, aout_execsw);
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