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
27#include <sys/cdefs.h>
| 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
27#include <sys/cdefs.h>
|
29
30#include <sys/param.h>
31#include <sys/exec.h>
32#include <sys/imgact.h>
33#include <sys/imgact_aout.h>
34#include <sys/kernel.h>
35#include <sys/limits.h>
36#include <sys/lock.h>
37#include <sys/malloc.h>
38#include <sys/mutex.h>
39#include <sys/proc.h>
40#include <sys/racct.h>
41#include <sys/resourcevar.h>
42#include <sys/signalvar.h>
43#include <sys/syscall.h>
44#include <sys/sysent.h>
45#include <sys/systm.h>
46#include <sys/vnode.h>
47
48#include <machine/frame.h>
49#include <machine/md_var.h>
50
51#include <vm/vm.h>
52#include <vm/pmap.h>
53#include <vm/vm_map.h>
54#include <vm/vm_object.h>
55#include <vm/vm_param.h>
56
57#ifdef __amd64__
58#include <compat/freebsd32/freebsd32_signal.h>
59#include <compat/freebsd32/freebsd32_util.h>
60#include <compat/freebsd32/freebsd32_proto.h>
61#include <compat/freebsd32/freebsd32_syscall.h>
62#include <compat/ia32/ia32_signal.h>
63#endif
64
65static int exec_aout_imgact(struct image_params *imgp);
66static int aout_fixup(register_t **stack_base, struct image_params *imgp);
67
68#if defined(__i386__)
69struct sysentvec aout_sysvec = {
70 .sv_size = SYS_MAXSYSCALL,
71 .sv_table = sysent,
72 .sv_mask = 0,
73 .sv_sigsize = 0,
74 .sv_sigtbl = NULL,
75 .sv_errsize = 0,
76 .sv_errtbl = NULL,
77 .sv_transtrap = NULL,
78 .sv_fixup = aout_fixup,
79 .sv_sendsig = sendsig,
80 .sv_sigcode = sigcode,
81 .sv_szsigcode = &szsigcode,
82 .sv_prepsyscall = NULL,
83 .sv_name = "FreeBSD a.out",
84 .sv_coredump = NULL,
85 .sv_imgact_try = NULL,
86 .sv_minsigstksz = MINSIGSTKSZ,
87 .sv_pagesize = PAGE_SIZE,
88 .sv_minuser = VM_MIN_ADDRESS,
89 .sv_maxuser = VM_MAXUSER_ADDRESS,
90 .sv_usrstack = USRSTACK,
91 .sv_psstrings = PS_STRINGS,
92 .sv_stackprot = VM_PROT_ALL,
93 .sv_copyout_strings = exec_copyout_strings,
94 .sv_setregs = exec_setregs,
95 .sv_fixlimit = NULL,
96 .sv_maxssiz = NULL,
97 .sv_flags = SV_ABI_FREEBSD | SV_AOUT | SV_IA32 | SV_ILP32,
98 .sv_set_syscall_retval = cpu_set_syscall_retval,
99 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
100 .sv_syscallnames = syscallnames,
101 .sv_schedtail = NULL,
102};
103
104#elif defined(__amd64__)
105
| 29
30#include <sys/param.h>
31#include <sys/exec.h>
32#include <sys/imgact.h>
33#include <sys/imgact_aout.h>
34#include <sys/kernel.h>
35#include <sys/limits.h>
36#include <sys/lock.h>
37#include <sys/malloc.h>
38#include <sys/mutex.h>
39#include <sys/proc.h>
40#include <sys/racct.h>
41#include <sys/resourcevar.h>
42#include <sys/signalvar.h>
43#include <sys/syscall.h>
44#include <sys/sysent.h>
45#include <sys/systm.h>
46#include <sys/vnode.h>
47
48#include <machine/frame.h>
49#include <machine/md_var.h>
50
51#include <vm/vm.h>
52#include <vm/pmap.h>
53#include <vm/vm_map.h>
54#include <vm/vm_object.h>
55#include <vm/vm_param.h>
56
57#ifdef __amd64__
58#include <compat/freebsd32/freebsd32_signal.h>
59#include <compat/freebsd32/freebsd32_util.h>
60#include <compat/freebsd32/freebsd32_proto.h>
61#include <compat/freebsd32/freebsd32_syscall.h>
62#include <compat/ia32/ia32_signal.h>
63#endif
64
65static int exec_aout_imgact(struct image_params *imgp);
66static int aout_fixup(register_t **stack_base, struct image_params *imgp);
67
68#if defined(__i386__)
69struct sysentvec aout_sysvec = {
70 .sv_size = SYS_MAXSYSCALL,
71 .sv_table = sysent,
72 .sv_mask = 0,
73 .sv_sigsize = 0,
74 .sv_sigtbl = NULL,
75 .sv_errsize = 0,
76 .sv_errtbl = NULL,
77 .sv_transtrap = NULL,
78 .sv_fixup = aout_fixup,
79 .sv_sendsig = sendsig,
80 .sv_sigcode = sigcode,
81 .sv_szsigcode = &szsigcode,
82 .sv_prepsyscall = NULL,
83 .sv_name = "FreeBSD a.out",
84 .sv_coredump = NULL,
85 .sv_imgact_try = NULL,
86 .sv_minsigstksz = MINSIGSTKSZ,
87 .sv_pagesize = PAGE_SIZE,
88 .sv_minuser = VM_MIN_ADDRESS,
89 .sv_maxuser = VM_MAXUSER_ADDRESS,
90 .sv_usrstack = USRSTACK,
91 .sv_psstrings = PS_STRINGS,
92 .sv_stackprot = VM_PROT_ALL,
93 .sv_copyout_strings = exec_copyout_strings,
94 .sv_setregs = exec_setregs,
95 .sv_fixlimit = NULL,
96 .sv_maxssiz = NULL,
97 .sv_flags = SV_ABI_FREEBSD | SV_AOUT | SV_IA32 | SV_ILP32,
98 .sv_set_syscall_retval = cpu_set_syscall_retval,
99 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
100 .sv_syscallnames = syscallnames,
101 .sv_schedtail = NULL,
102};
103
104#elif defined(__amd64__)
105
|
107#define AOUT32_PS_STRINGS \
108 (AOUT32_USRSTACK - sizeof(struct freebsd32_ps_strings))
109
110extern const char *freebsd32_syscallnames[];
111extern u_long ia32_maxssiz;
112
113struct sysentvec aout_sysvec = {
114 .sv_size = FREEBSD32_SYS_MAXSYSCALL,
115 .sv_table = freebsd32_sysent,
116 .sv_mask = 0,
117 .sv_sigsize = 0,
118 .sv_sigtbl = NULL,
119 .sv_errsize = 0,
120 .sv_errtbl = NULL,
121 .sv_transtrap = NULL,
122 .sv_fixup = aout_fixup,
123 .sv_sendsig = ia32_sendsig,
124 .sv_sigcode = ia32_sigcode,
125 .sv_szsigcode = &sz_ia32_sigcode,
126 .sv_prepsyscall = NULL,
127 .sv_name = "FreeBSD a.out",
128 .sv_coredump = NULL,
129 .sv_imgact_try = NULL,
130 .sv_minsigstksz = MINSIGSTKSZ,
131 .sv_pagesize = IA32_PAGE_SIZE,
132 .sv_minuser = 0,
133 .sv_maxuser = AOUT32_USRSTACK,
134 .sv_usrstack = AOUT32_USRSTACK,
135 .sv_psstrings = AOUT32_PS_STRINGS,
136 .sv_stackprot = VM_PROT_ALL,
137 .sv_copyout_strings = freebsd32_copyout_strings,
138 .sv_setregs = ia32_setregs,
139 .sv_fixlimit = ia32_fixlimit,
140 .sv_maxssiz = &ia32_maxssiz,
141 .sv_flags = SV_ABI_FREEBSD | SV_AOUT | SV_IA32 | SV_ILP32,
142 .sv_set_syscall_retval = ia32_set_syscall_retval,
143 .sv_fetch_syscall_args = ia32_fetch_syscall_args,
144 .sv_syscallnames = freebsd32_syscallnames,
145};
146#else
147#error "Port me"
148#endif
149
150static int
151aout_fixup(register_t **stack_base, struct image_params *imgp)
152{
153
154 *(char **)stack_base -= sizeof(uint32_t);
155 return (suword(*stack_base, imgp->args->argc));
156}
157
158static int
159exec_aout_imgact(struct image_params *imgp)
160{
161 const struct exec *a_out = (const struct exec *) imgp->image_header;
162 struct vmspace *vmspace;
163 vm_map_t map;
164 vm_object_t object;
165 vm_offset_t text_end, data_end;
166 unsigned long virtual_offset;
167 unsigned long file_offset;
168 unsigned long bss_size;
169 int error;
170
171 /*
172 * Linux and *BSD binaries look very much alike,
173 * only the machine id is different:
174 * 0x64 for Linux, 0x86 for *BSD, 0x00 for BSDI.
175 * NetBSD is in network byte order.. ugh.
176 */
177 if (((a_out->a_magic >> 16) & 0xff) != 0x86 &&
178 ((a_out->a_magic >> 16) & 0xff) != 0 &&
179 ((((int)ntohl(a_out->a_magic)) >> 16) & 0xff) != 0x86)
180 return -1;
181
182 /*
183 * Set file/virtual offset based on a.out variant.
184 * We do two cases: host byte order and network byte order
185 * (for NetBSD compatibility)
186 */
187 switch ((int)(a_out->a_magic & 0xffff)) {
188 case ZMAGIC:
189 virtual_offset = 0;
190 if (a_out->a_text) {
191 file_offset = PAGE_SIZE;
192 } else {
193 /* Bill's "screwball mode" */
194 file_offset = 0;
195 }
196 break;
197 case QMAGIC:
198 virtual_offset = PAGE_SIZE;
199 file_offset = 0;
200 /* Pass PS_STRINGS for BSD/OS binaries only. */
201 if (N_GETMID(*a_out) == MID_ZERO)
202 imgp->ps_strings = aout_sysvec.sv_psstrings;
203 break;
204 default:
205 /* NetBSD compatibility */
206 switch ((int)(ntohl(a_out->a_magic) & 0xffff)) {
207 case ZMAGIC:
208 case QMAGIC:
209 virtual_offset = PAGE_SIZE;
210 file_offset = 0;
211 break;
212 default:
213 return (-1);
214 }
215 }
216
217 bss_size = roundup(a_out->a_bss, PAGE_SIZE);
218
219 /*
220 * Check various fields in header for validity/bounds.
221 */
222 if (/* entry point must lay with text region */
223 a_out->a_entry < virtual_offset ||
224 a_out->a_entry >= virtual_offset + a_out->a_text ||
225
226 /* text and data size must each be page rounded */
227 a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK
228
229#ifdef __amd64__
230 ||
231 /* overflows */
232 virtual_offset + a_out->a_text + a_out->a_data + bss_size > UINT_MAX
233#endif
234 )
235 return (-1);
236
237 /* text + data can't exceed file size */
238 if (a_out->a_data + a_out->a_text > imgp->attr->va_size)
239 return (EFAULT);
240
241 /*
242 * text/data/bss must not exceed limits
243 */
244 PROC_LOCK(imgp->proc);
245 if (/* text can't exceed maximum text size */
246 a_out->a_text > maxtsiz ||
247
248 /* data + bss can't exceed rlimit */
249 a_out->a_data + bss_size > lim_cur(imgp->proc, RLIMIT_DATA) ||
250 racct_set(imgp->proc, RACCT_DATA, a_out->a_data + bss_size) != 0) {
251 PROC_UNLOCK(imgp->proc);
252 return (ENOMEM);
253 }
254 PROC_UNLOCK(imgp->proc);
255
256 /*
257 * Avoid a possible deadlock if the current address space is destroyed
258 * and that address space maps the locked vnode. In the common case,
259 * the locked vnode's v_usecount is decremented but remains greater
260 * than zero. Consequently, the vnode lock is not needed by vrele().
261 * However, in cases where the vnode lock is external, such as nullfs,
262 * v_usecount may become zero.
263 */
264 VOP_UNLOCK(imgp->vp, 0);
265
266 /*
267 * Destroy old process VM and create a new one (with a new stack)
268 */
269 error = exec_new_vmspace(imgp, &aout_sysvec);
270
271 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY);
272 if (error)
273 return (error);
274
275 /*
276 * The vm space can be changed by exec_new_vmspace
277 */
278 vmspace = imgp->proc->p_vmspace;
279
280 object = imgp->object;
281 map = &vmspace->vm_map;
282 vm_map_lock(map);
283 vm_object_reference(object);
284
285 text_end = virtual_offset + a_out->a_text;
286 error = vm_map_insert(map, object,
287 file_offset,
288 virtual_offset, text_end,
289 VM_PROT_READ | VM_PROT_EXECUTE, VM_PROT_ALL,
290 MAP_COPY_ON_WRITE | MAP_PREFAULT);
291 if (error) {
292 vm_map_unlock(map);
293 vm_object_deallocate(object);
294 return (error);
295 }
296 data_end = text_end + a_out->a_data;
297 if (a_out->a_data) {
298 vm_object_reference(object);
299 error = vm_map_insert(map, object,
300 file_offset + a_out->a_text,
301 text_end, data_end,
302 VM_PROT_ALL, VM_PROT_ALL,
303 MAP_COPY_ON_WRITE | MAP_PREFAULT);
304 if (error) {
305 vm_map_unlock(map);
306 vm_object_deallocate(object);
307 return (error);
308 }
309 }
310
311 if (bss_size) {
312 error = vm_map_insert(map, NULL, 0,
313 data_end, data_end + bss_size,
314 VM_PROT_ALL, VM_PROT_ALL, 0);
315 if (error) {
316 vm_map_unlock(map);
317 return (error);
318 }
319 }
320 vm_map_unlock(map);
321
322 /* Fill in process VM information */
323 vmspace->vm_tsize = a_out->a_text >> PAGE_SHIFT;
324 vmspace->vm_dsize = (a_out->a_data + bss_size) >> PAGE_SHIFT;
325 vmspace->vm_taddr = (caddr_t) (uintptr_t) virtual_offset;
326 vmspace->vm_daddr = (caddr_t) (uintptr_t)
327 (virtual_offset + a_out->a_text);
328
329 /* Fill in image_params */
330 imgp->interpreted = 0;
331 imgp->entry_addr = a_out->a_entry;
332
333 imgp->proc->p_sysent = &aout_sysvec;
334
335 return (0);
336}
337
338/*
339 * Tell kern_execve.c about it, with a little help from the linker.
340 */
341static struct execsw aout_execsw = { exec_aout_imgact, "a.out" };
342EXEC_SET(aout, aout_execsw);
| 107#define AOUT32_PS_STRINGS \
108 (AOUT32_USRSTACK - sizeof(struct freebsd32_ps_strings))
109
110extern const char *freebsd32_syscallnames[];
111extern u_long ia32_maxssiz;
112
113struct sysentvec aout_sysvec = {
114 .sv_size = FREEBSD32_SYS_MAXSYSCALL,
115 .sv_table = freebsd32_sysent,
116 .sv_mask = 0,
117 .sv_sigsize = 0,
118 .sv_sigtbl = NULL,
119 .sv_errsize = 0,
120 .sv_errtbl = NULL,
121 .sv_transtrap = NULL,
122 .sv_fixup = aout_fixup,
123 .sv_sendsig = ia32_sendsig,
124 .sv_sigcode = ia32_sigcode,
125 .sv_szsigcode = &sz_ia32_sigcode,
126 .sv_prepsyscall = NULL,
127 .sv_name = "FreeBSD a.out",
128 .sv_coredump = NULL,
129 .sv_imgact_try = NULL,
130 .sv_minsigstksz = MINSIGSTKSZ,
131 .sv_pagesize = IA32_PAGE_SIZE,
132 .sv_minuser = 0,
133 .sv_maxuser = AOUT32_USRSTACK,
134 .sv_usrstack = AOUT32_USRSTACK,
135 .sv_psstrings = AOUT32_PS_STRINGS,
136 .sv_stackprot = VM_PROT_ALL,
137 .sv_copyout_strings = freebsd32_copyout_strings,
138 .sv_setregs = ia32_setregs,
139 .sv_fixlimit = ia32_fixlimit,
140 .sv_maxssiz = &ia32_maxssiz,
141 .sv_flags = SV_ABI_FREEBSD | SV_AOUT | SV_IA32 | SV_ILP32,
142 .sv_set_syscall_retval = ia32_set_syscall_retval,
143 .sv_fetch_syscall_args = ia32_fetch_syscall_args,
144 .sv_syscallnames = freebsd32_syscallnames,
145};
146#else
147#error "Port me"
148#endif
149
150static int
151aout_fixup(register_t **stack_base, struct image_params *imgp)
152{
153
154 *(char **)stack_base -= sizeof(uint32_t);
155 return (suword(*stack_base, imgp->args->argc));
156}
157
158static int
159exec_aout_imgact(struct image_params *imgp)
160{
161 const struct exec *a_out = (const struct exec *) imgp->image_header;
162 struct vmspace *vmspace;
163 vm_map_t map;
164 vm_object_t object;
165 vm_offset_t text_end, data_end;
166 unsigned long virtual_offset;
167 unsigned long file_offset;
168 unsigned long bss_size;
169 int error;
170
171 /*
172 * Linux and *BSD binaries look very much alike,
173 * only the machine id is different:
174 * 0x64 for Linux, 0x86 for *BSD, 0x00 for BSDI.
175 * NetBSD is in network byte order.. ugh.
176 */
177 if (((a_out->a_magic >> 16) & 0xff) != 0x86 &&
178 ((a_out->a_magic >> 16) & 0xff) != 0 &&
179 ((((int)ntohl(a_out->a_magic)) >> 16) & 0xff) != 0x86)
180 return -1;
181
182 /*
183 * Set file/virtual offset based on a.out variant.
184 * We do two cases: host byte order and network byte order
185 * (for NetBSD compatibility)
186 */
187 switch ((int)(a_out->a_magic & 0xffff)) {
188 case ZMAGIC:
189 virtual_offset = 0;
190 if (a_out->a_text) {
191 file_offset = PAGE_SIZE;
192 } else {
193 /* Bill's "screwball mode" */
194 file_offset = 0;
195 }
196 break;
197 case QMAGIC:
198 virtual_offset = PAGE_SIZE;
199 file_offset = 0;
200 /* Pass PS_STRINGS for BSD/OS binaries only. */
201 if (N_GETMID(*a_out) == MID_ZERO)
202 imgp->ps_strings = aout_sysvec.sv_psstrings;
203 break;
204 default:
205 /* NetBSD compatibility */
206 switch ((int)(ntohl(a_out->a_magic) & 0xffff)) {
207 case ZMAGIC:
208 case QMAGIC:
209 virtual_offset = PAGE_SIZE;
210 file_offset = 0;
211 break;
212 default:
213 return (-1);
214 }
215 }
216
217 bss_size = roundup(a_out->a_bss, PAGE_SIZE);
218
219 /*
220 * Check various fields in header for validity/bounds.
221 */
222 if (/* entry point must lay with text region */
223 a_out->a_entry < virtual_offset ||
224 a_out->a_entry >= virtual_offset + a_out->a_text ||
225
226 /* text and data size must each be page rounded */
227 a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK
228
229#ifdef __amd64__
230 ||
231 /* overflows */
232 virtual_offset + a_out->a_text + a_out->a_data + bss_size > UINT_MAX
233#endif
234 )
235 return (-1);
236
237 /* text + data can't exceed file size */
238 if (a_out->a_data + a_out->a_text > imgp->attr->va_size)
239 return (EFAULT);
240
241 /*
242 * text/data/bss must not exceed limits
243 */
244 PROC_LOCK(imgp->proc);
245 if (/* text can't exceed maximum text size */
246 a_out->a_text > maxtsiz ||
247
248 /* data + bss can't exceed rlimit */
249 a_out->a_data + bss_size > lim_cur(imgp->proc, RLIMIT_DATA) ||
250 racct_set(imgp->proc, RACCT_DATA, a_out->a_data + bss_size) != 0) {
251 PROC_UNLOCK(imgp->proc);
252 return (ENOMEM);
253 }
254 PROC_UNLOCK(imgp->proc);
255
256 /*
257 * Avoid a possible deadlock if the current address space is destroyed
258 * and that address space maps the locked vnode. In the common case,
259 * the locked vnode's v_usecount is decremented but remains greater
260 * than zero. Consequently, the vnode lock is not needed by vrele().
261 * However, in cases where the vnode lock is external, such as nullfs,
262 * v_usecount may become zero.
263 */
264 VOP_UNLOCK(imgp->vp, 0);
265
266 /*
267 * Destroy old process VM and create a new one (with a new stack)
268 */
269 error = exec_new_vmspace(imgp, &aout_sysvec);
270
271 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY);
272 if (error)
273 return (error);
274
275 /*
276 * The vm space can be changed by exec_new_vmspace
277 */
278 vmspace = imgp->proc->p_vmspace;
279
280 object = imgp->object;
281 map = &vmspace->vm_map;
282 vm_map_lock(map);
283 vm_object_reference(object);
284
285 text_end = virtual_offset + a_out->a_text;
286 error = vm_map_insert(map, object,
287 file_offset,
288 virtual_offset, text_end,
289 VM_PROT_READ | VM_PROT_EXECUTE, VM_PROT_ALL,
290 MAP_COPY_ON_WRITE | MAP_PREFAULT);
291 if (error) {
292 vm_map_unlock(map);
293 vm_object_deallocate(object);
294 return (error);
295 }
296 data_end = text_end + a_out->a_data;
297 if (a_out->a_data) {
298 vm_object_reference(object);
299 error = vm_map_insert(map, object,
300 file_offset + a_out->a_text,
301 text_end, data_end,
302 VM_PROT_ALL, VM_PROT_ALL,
303 MAP_COPY_ON_WRITE | MAP_PREFAULT);
304 if (error) {
305 vm_map_unlock(map);
306 vm_object_deallocate(object);
307 return (error);
308 }
309 }
310
311 if (bss_size) {
312 error = vm_map_insert(map, NULL, 0,
313 data_end, data_end + bss_size,
314 VM_PROT_ALL, VM_PROT_ALL, 0);
315 if (error) {
316 vm_map_unlock(map);
317 return (error);
318 }
319 }
320 vm_map_unlock(map);
321
322 /* Fill in process VM information */
323 vmspace->vm_tsize = a_out->a_text >> PAGE_SHIFT;
324 vmspace->vm_dsize = (a_out->a_data + bss_size) >> PAGE_SHIFT;
325 vmspace->vm_taddr = (caddr_t) (uintptr_t) virtual_offset;
326 vmspace->vm_daddr = (caddr_t) (uintptr_t)
327 (virtual_offset + a_out->a_text);
328
329 /* Fill in image_params */
330 imgp->interpreted = 0;
331 imgp->entry_addr = a_out->a_entry;
332
333 imgp->proc->p_sysent = &aout_sysvec;
334
335 return (0);
336}
337
338/*
339 * Tell kern_execve.c about it, with a little help from the linker.
340 */
341static struct execsw aout_execsw = { exec_aout_imgact, "a.out" };
342EXEC_SET(aout, aout_execsw);
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