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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
| 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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
|
26 * $FreeBSD: head/sys/kern/imgact_aout.c 50477 1999-08-28 01:08:13Z peter $
| 26 * $FreeBSD: head/sys/kern/imgact_aout.c 50717 1999-09-01 00:29:56Z julian $
|
27 */
28
29#include <sys/param.h>
30#include <sys/acct.h>
31#include <sys/resourcevar.h>
32#include <sys/exec.h>
33#include <sys/fcntl.h>
34#include <sys/imgact.h>
35#include <sys/imgact_aout.h>
36#include <sys/kernel.h>
37#include <sys/malloc.h>
38#include <sys/namei.h>
39#include <sys/pioctl.h>
40#include <sys/proc.h>
41#include <sys/signalvar.h>
42#include <sys/stat.h>
43#include <sys/sysent.h>
44#include <sys/syscall.h>
45#include <sys/vnode.h>
46#include <sys/systm.h>
47#include <machine/md_var.h>
48
49#include <vm/vm.h>
50#include <vm/vm_param.h>
51#include <vm/vm_prot.h>
52#include <sys/lock.h>
53#include <vm/pmap.h>
54#include <vm/vm_map.h>
55#include <vm/vm_object.h>
56#include <sys/user.h>
57
58static int exec_aout_imgact __P((struct image_params *imgp));
59
60struct sysentvec aout_sysvec = {
61 SYS_MAXSYSCALL,
62 sysent,
63 0,
64 0,
65 0,
66 0,
67 0,
68 0,
69 0,
70 sendsig,
71 sigcode,
72 &szsigcode,
73 0,
74 "FreeBSD a.out",
75 aout_coredump
76};
77
| 27 */
28
29#include <sys/param.h>
30#include <sys/acct.h>
31#include <sys/resourcevar.h>
32#include <sys/exec.h>
33#include <sys/fcntl.h>
34#include <sys/imgact.h>
35#include <sys/imgact_aout.h>
36#include <sys/kernel.h>
37#include <sys/malloc.h>
38#include <sys/namei.h>
39#include <sys/pioctl.h>
40#include <sys/proc.h>
41#include <sys/signalvar.h>
42#include <sys/stat.h>
43#include <sys/sysent.h>
44#include <sys/syscall.h>
45#include <sys/vnode.h>
46#include <sys/systm.h>
47#include <machine/md_var.h>
48
49#include <vm/vm.h>
50#include <vm/vm_param.h>
51#include <vm/vm_prot.h>
52#include <sys/lock.h>
53#include <vm/pmap.h>
54#include <vm/vm_map.h>
55#include <vm/vm_object.h>
56#include <sys/user.h>
57
58static int exec_aout_imgact __P((struct image_params *imgp));
59
60struct sysentvec aout_sysvec = {
61 SYS_MAXSYSCALL,
62 sysent,
63 0,
64 0,
65 0,
66 0,
67 0,
68 0,
69 0,
70 sendsig,
71 sigcode,
72 &szsigcode,
73 0,
74 "FreeBSD a.out",
75 aout_coredump
76};
77
|
78static int
| 78int
|
79exec_aout_imgact(imgp)
80 struct image_params *imgp;
81{
82 const struct exec *a_out = (const struct exec *) imgp->image_header;
83 struct vmspace *vmspace;
84 struct vnode *vp;
85 vm_map_t map;
86 vm_object_t object;
87 vm_offset_t text_end, data_end;
88 unsigned long virtual_offset;
89 unsigned long file_offset;
90 unsigned long bss_size;
91 int error;
92
93 /*
94 * Linux and *BSD binaries look very much alike,
95 * only the machine id is different:
96 * 0x64 for Linux, 0x86 for *BSD, 0x00 for BSDI.
97 * NetBSD is in network byte order.. ugh.
98 */
99 if (((a_out->a_magic >> 16) & 0xff) != 0x86 &&
100 ((a_out->a_magic >> 16) & 0xff) != 0 &&
101 ((((int)ntohl(a_out->a_magic)) >> 16) & 0xff) != 0x86)
102 return -1;
103
104 /*
105 * Set file/virtual offset based on a.out variant.
106 * We do two cases: host byte order and network byte order
107 * (for NetBSD compatibility)
108 */
109 switch ((int)(a_out->a_magic & 0xffff)) {
110 case ZMAGIC:
111 virtual_offset = 0;
112 if (a_out->a_text) {
113 file_offset = PAGE_SIZE;
114 } else {
115 /* Bill's "screwball mode" */
116 file_offset = 0;
117 }
118 break;
119 case QMAGIC:
120 virtual_offset = PAGE_SIZE;
121 file_offset = 0;
122 /* Pass PS_STRINGS for BSD/OS binaries only. */
123 if (N_GETMID(*a_out) == MID_ZERO)
124 imgp->ps_strings = PS_STRINGS;
125 break;
126 default:
127 /* NetBSD compatibility */
128 switch ((int)(ntohl(a_out->a_magic) & 0xffff)) {
129 case ZMAGIC:
130 case QMAGIC:
131 virtual_offset = PAGE_SIZE;
132 file_offset = 0;
133 break;
134 default:
135 return (-1);
136 }
137 }
138
139 bss_size = roundup(a_out->a_bss, PAGE_SIZE);
140
141 /*
142 * Check various fields in header for validity/bounds.
143 */
144 if (/* entry point must lay with text region */
145 a_out->a_entry < virtual_offset ||
146 a_out->a_entry >= virtual_offset + a_out->a_text ||
147
148 /* text and data size must each be page rounded */
149 a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK)
150 return (-1);
151
152 /* text + data can't exceed file size */
153 if (a_out->a_data + a_out->a_text > imgp->attr->va_size)
154 return (EFAULT);
155
156 /*
157 * text/data/bss must not exceed limits
158 */
159 if (/* text can't exceed maximum text size */
160 a_out->a_text > MAXTSIZ ||
161
162 /* data + bss can't exceed rlimit */
163 a_out->a_data + bss_size >
164 imgp->proc->p_rlimit[RLIMIT_DATA].rlim_cur)
165 return (ENOMEM);
166
167 /* copy in arguments and/or environment from old process */
168 error = exec_extract_strings(imgp);
169 if (error)
170 return (error);
171
172 /*
173 * Destroy old process VM and create a new one (with a new stack)
174 */
175 exec_new_vmspace(imgp);
176
177 /*
178 * The vm space can be changed by exec_new_vmspace
179 */
180 vmspace = imgp->proc->p_vmspace;
181
182 vp = imgp->vp;
183 map = &vmspace->vm_map;
184 vm_map_lock(map);
185 object = vp->v_object;
186 vm_object_reference(object);
187
188 text_end = virtual_offset + a_out->a_text;
189 error = vm_map_insert(map, object,
190 file_offset,
191 virtual_offset, text_end,
192 VM_PROT_READ | VM_PROT_EXECUTE, VM_PROT_ALL,
193 MAP_COPY_ON_WRITE | MAP_PREFAULT);
194 if (error) {
195 vm_map_unlock(map);
196 return (error);
197 }
198 data_end = text_end + a_out->a_data;
199 if (a_out->a_data) {
200 vm_object_reference(object);
201 error = vm_map_insert(map, object,
202 file_offset + a_out->a_text,
203 text_end, data_end,
204 VM_PROT_ALL, VM_PROT_ALL,
205 MAP_COPY_ON_WRITE | MAP_PREFAULT);
206 if (error) {
207 vm_map_unlock(map);
208 return (error);
209 }
210 }
211
212 if (bss_size) {
213 error = vm_map_insert(map, NULL, 0,
214 data_end, data_end + bss_size,
215 VM_PROT_ALL, VM_PROT_ALL, 0);
216 if (error) {
217 vm_map_unlock(map);
218 return (error);
219 }
220 }
221 vm_map_unlock(map);
222
223 /* Fill in process VM information */
224 vmspace->vm_tsize = a_out->a_text >> PAGE_SHIFT;
225 vmspace->vm_dsize = (a_out->a_data + bss_size) >> PAGE_SHIFT;
226 vmspace->vm_taddr = (caddr_t) (uintptr_t) virtual_offset;
227 vmspace->vm_daddr = (caddr_t) (uintptr_t)
228 (virtual_offset + a_out->a_text);
229
230 /* Fill in image_params */
231 imgp->interpreted = 0;
232 imgp->entry_addr = a_out->a_entry;
233
234 imgp->proc->p_sysent = &aout_sysvec;
235
236 /* Indicate that this file should not be modified */
237 imgp->vp->v_flag |= VTEXT;
238
239 return (0);
240}
241
242/*
243 * Dump core, into a file named as described in the comments for
244 * expand_name(), unless the process was setuid/setgid.
245 */
246int
| 79exec_aout_imgact(imgp)
80 struct image_params *imgp;
81{
82 const struct exec *a_out = (const struct exec *) imgp->image_header;
83 struct vmspace *vmspace;
84 struct vnode *vp;
85 vm_map_t map;
86 vm_object_t object;
87 vm_offset_t text_end, data_end;
88 unsigned long virtual_offset;
89 unsigned long file_offset;
90 unsigned long bss_size;
91 int error;
92
93 /*
94 * Linux and *BSD binaries look very much alike,
95 * only the machine id is different:
96 * 0x64 for Linux, 0x86 for *BSD, 0x00 for BSDI.
97 * NetBSD is in network byte order.. ugh.
98 */
99 if (((a_out->a_magic >> 16) & 0xff) != 0x86 &&
100 ((a_out->a_magic >> 16) & 0xff) != 0 &&
101 ((((int)ntohl(a_out->a_magic)) >> 16) & 0xff) != 0x86)
102 return -1;
103
104 /*
105 * Set file/virtual offset based on a.out variant.
106 * We do two cases: host byte order and network byte order
107 * (for NetBSD compatibility)
108 */
109 switch ((int)(a_out->a_magic & 0xffff)) {
110 case ZMAGIC:
111 virtual_offset = 0;
112 if (a_out->a_text) {
113 file_offset = PAGE_SIZE;
114 } else {
115 /* Bill's "screwball mode" */
116 file_offset = 0;
117 }
118 break;
119 case QMAGIC:
120 virtual_offset = PAGE_SIZE;
121 file_offset = 0;
122 /* Pass PS_STRINGS for BSD/OS binaries only. */
123 if (N_GETMID(*a_out) == MID_ZERO)
124 imgp->ps_strings = PS_STRINGS;
125 break;
126 default:
127 /* NetBSD compatibility */
128 switch ((int)(ntohl(a_out->a_magic) & 0xffff)) {
129 case ZMAGIC:
130 case QMAGIC:
131 virtual_offset = PAGE_SIZE;
132 file_offset = 0;
133 break;
134 default:
135 return (-1);
136 }
137 }
138
139 bss_size = roundup(a_out->a_bss, PAGE_SIZE);
140
141 /*
142 * Check various fields in header for validity/bounds.
143 */
144 if (/* entry point must lay with text region */
145 a_out->a_entry < virtual_offset ||
146 a_out->a_entry >= virtual_offset + a_out->a_text ||
147
148 /* text and data size must each be page rounded */
149 a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK)
150 return (-1);
151
152 /* text + data can't exceed file size */
153 if (a_out->a_data + a_out->a_text > imgp->attr->va_size)
154 return (EFAULT);
155
156 /*
157 * text/data/bss must not exceed limits
158 */
159 if (/* text can't exceed maximum text size */
160 a_out->a_text > MAXTSIZ ||
161
162 /* data + bss can't exceed rlimit */
163 a_out->a_data + bss_size >
164 imgp->proc->p_rlimit[RLIMIT_DATA].rlim_cur)
165 return (ENOMEM);
166
167 /* copy in arguments and/or environment from old process */
168 error = exec_extract_strings(imgp);
169 if (error)
170 return (error);
171
172 /*
173 * Destroy old process VM and create a new one (with a new stack)
174 */
175 exec_new_vmspace(imgp);
176
177 /*
178 * The vm space can be changed by exec_new_vmspace
179 */
180 vmspace = imgp->proc->p_vmspace;
181
182 vp = imgp->vp;
183 map = &vmspace->vm_map;
184 vm_map_lock(map);
185 object = vp->v_object;
186 vm_object_reference(object);
187
188 text_end = virtual_offset + a_out->a_text;
189 error = vm_map_insert(map, object,
190 file_offset,
191 virtual_offset, text_end,
192 VM_PROT_READ | VM_PROT_EXECUTE, VM_PROT_ALL,
193 MAP_COPY_ON_WRITE | MAP_PREFAULT);
194 if (error) {
195 vm_map_unlock(map);
196 return (error);
197 }
198 data_end = text_end + a_out->a_data;
199 if (a_out->a_data) {
200 vm_object_reference(object);
201 error = vm_map_insert(map, object,
202 file_offset + a_out->a_text,
203 text_end, data_end,
204 VM_PROT_ALL, VM_PROT_ALL,
205 MAP_COPY_ON_WRITE | MAP_PREFAULT);
206 if (error) {
207 vm_map_unlock(map);
208 return (error);
209 }
210 }
211
212 if (bss_size) {
213 error = vm_map_insert(map, NULL, 0,
214 data_end, data_end + bss_size,
215 VM_PROT_ALL, VM_PROT_ALL, 0);
216 if (error) {
217 vm_map_unlock(map);
218 return (error);
219 }
220 }
221 vm_map_unlock(map);
222
223 /* Fill in process VM information */
224 vmspace->vm_tsize = a_out->a_text >> PAGE_SHIFT;
225 vmspace->vm_dsize = (a_out->a_data + bss_size) >> PAGE_SHIFT;
226 vmspace->vm_taddr = (caddr_t) (uintptr_t) virtual_offset;
227 vmspace->vm_daddr = (caddr_t) (uintptr_t)
228 (virtual_offset + a_out->a_text);
229
230 /* Fill in image_params */
231 imgp->interpreted = 0;
232 imgp->entry_addr = a_out->a_entry;
233
234 imgp->proc->p_sysent = &aout_sysvec;
235
236 /* Indicate that this file should not be modified */
237 imgp->vp->v_flag |= VTEXT;
238
239 return (0);
240}
241
242/*
243 * Dump core, into a file named as described in the comments for
244 * expand_name(), unless the process was setuid/setgid.
245 */
246int
|
247aout_coredump(p)
| 247aout_coredump(p, vp, limit)
|
248 register struct proc *p;
| 248 register struct proc *p;
|
249{
| |
250 register struct vnode *vp;
| 249 register struct vnode *vp;
|
| 250 off_t limit;
251{
|
251 register struct ucred *cred = p->p_cred->pc_ucred;
252 register struct vmspace *vm = p->p_vmspace;
| 252 register struct ucred *cred = p->p_cred->pc_ucred;
253 register struct vmspace *vm = p->p_vmspace;
|
253 struct nameidata nd;
254 struct vattr vattr;
255 int error, error1;
256 char *name; /* name of corefile */
| 254 int error = 0;
|
257
| 255
|
258 STOPEVENT(p, S_CORE, 0);
259 if (sugid_coredump == 0 && p->p_flag & P_SUGID)
260 return (EFAULT);
| |
261 if (ctob(UPAGES + vm->vm_dsize + vm->vm_ssize) >=
| 256 if (ctob(UPAGES + vm->vm_dsize + vm->vm_ssize) >=
|
262 p->p_rlimit[RLIMIT_CORE].rlim_cur)
| 257 limit)
|
263 return (EFAULT);
| 258 return (EFAULT);
|
264 name = expand_name(p->p_comm, p->p_ucred->cr_uid, p->p_pid);
265 if (name == NULL)
266 return (EFAULT); /* XXX -- not the best error */
267 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, name, p);
268 error = vn_open(&nd, O_CREAT | FWRITE | O_NOFOLLOW, S_IRUSR | S_IWUSR);
269 free(name, M_TEMP);
270 if (error)
271 return (error);
272 vp = nd.ni_vp;
| |
273
| 259
|
274 /* Don't dump to non-regular files or files with links. */
275 if (vp->v_type != VREG ||
276 VOP_GETATTR(vp, &vattr, cred, p) || vattr.va_nlink != 1) {
277 error = EFAULT;
278 goto out;
279 }
280 VATTR_NULL(&vattr);
281 vattr.va_size = 0;
282 VOP_LEASE(vp, p, cred, LEASE_WRITE);
283 VOP_SETATTR(vp, &vattr, cred, p);
284 p->p_acflag |= ACORE;
| |
285 bcopy(p, &p->p_addr->u_kproc.kp_proc, sizeof(struct proc));
286 fill_eproc(p, &p->p_addr->u_kproc.kp_eproc);
287 error = cpu_coredump(p, vp, cred);
288 if (error == 0)
289 error = vn_rdwr(UIO_WRITE, vp, vm->vm_daddr,
290 (int)ctob(vm->vm_dsize), (off_t)ctob(UPAGES), UIO_USERSPACE,
291 IO_NODELOCKED|IO_UNIT, cred, (int *) NULL, p);
292 if (error == 0)
293 error = vn_rdwr(UIO_WRITE, vp,
294 (caddr_t) trunc_page(USRSTACK - ctob(vm->vm_ssize)),
295 round_page(ctob(vm->vm_ssize)),
296 (off_t)ctob(UPAGES) + ctob(vm->vm_dsize), UIO_USERSPACE,
297 IO_NODELOCKED|IO_UNIT, cred, (int *) NULL, p);
| 260 bcopy(p, &p->p_addr->u_kproc.kp_proc, sizeof(struct proc));
261 fill_eproc(p, &p->p_addr->u_kproc.kp_eproc);
262 error = cpu_coredump(p, vp, cred);
263 if (error == 0)
264 error = vn_rdwr(UIO_WRITE, vp, vm->vm_daddr,
265 (int)ctob(vm->vm_dsize), (off_t)ctob(UPAGES), UIO_USERSPACE,
266 IO_NODELOCKED|IO_UNIT, cred, (int *) NULL, p);
267 if (error == 0)
268 error = vn_rdwr(UIO_WRITE, vp,
269 (caddr_t) trunc_page(USRSTACK - ctob(vm->vm_ssize)),
270 round_page(ctob(vm->vm_ssize)),
271 (off_t)ctob(UPAGES) + ctob(vm->vm_dsize), UIO_USERSPACE,
272 IO_NODELOCKED|IO_UNIT, cred, (int *) NULL, p);
|
298out:
299 VOP_UNLOCK(vp, 0, p);
300 error1 = vn_close(vp, FWRITE, cred, p);
301 if (error == 0)
302 error = error1;
303 return (error);
| 273 return error;
|
304}
305
306/*
307 * Tell kern_execve.c about it, with a little help from the linker.
308 */
309static struct execsw aout_execsw = { exec_aout_imgact, "a.out" };
310EXEC_SET(aout, aout_execsw);
| 274}
275
276/*
277 * Tell kern_execve.c about it, with a little help from the linker.
278 */
279static struct execsw aout_execsw = { exec_aout_imgact, "a.out" };
280EXEC_SET(aout, aout_execsw);
|