1/*-
2 * Copyright (c) 1994-1996 S��ren Schmidt
3 * All rights reserved.
4 *
5 * Based heavily on /sys/kern/imgact_aout.c which is:
6 * Copyright (c) 1993, David Greenman
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer
13 * in this position and unchanged.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 1994-1996 S��ren Schmidt
3 * All rights reserved.
4 *
5 * Based heavily on /sys/kern/imgact_aout.c which is:
6 * Copyright (c) 1993, David Greenman
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer
13 * in this position and unchanged.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
|
33__FBSDID("$FreeBSD: head/sys/i386/linux/imgact_linux.c 230132 2012-01-15 13:23:18Z uqs $");
| 33__FBSDID("$FreeBSD: head/sys/i386/linux/imgact_linux.c 231885 2012-02-17 23:47:16Z kib $");
|
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/exec.h>
38#include <sys/imgact.h>
39#include <sys/imgact_aout.h>
40#include <sys/kernel.h>
41#include <sys/lock.h>
42#include <sys/mman.h>
43#include <sys/mutex.h>
44#include <sys/proc.h>
45#include <sys/racct.h>
46#include <sys/resourcevar.h>
47#include <sys/vnode.h>
48
49#include <vm/vm.h>
50#include <vm/vm_kern.h>
51#include <vm/vm_param.h>
52#include <vm/pmap.h>
53#include <vm/vm_map.h>
54#include <vm/vm_extern.h>
55
56#include <i386/linux/linux.h>
57
58static int exec_linux_imgact(struct image_params *iparams);
59
60static int
61exec_linux_imgact(struct image_params *imgp)
62{
63 const struct exec *a_out = (const struct exec *) imgp->image_header;
64 struct vmspace *vmspace;
65 vm_offset_t vmaddr;
66 unsigned long virtual_offset, file_offset;
| 34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/exec.h>
38#include <sys/imgact.h>
39#include <sys/imgact_aout.h>
40#include <sys/kernel.h>
41#include <sys/lock.h>
42#include <sys/mman.h>
43#include <sys/mutex.h>
44#include <sys/proc.h>
45#include <sys/racct.h>
46#include <sys/resourcevar.h>
47#include <sys/vnode.h>
48
49#include <vm/vm.h>
50#include <vm/vm_kern.h>
51#include <vm/vm_param.h>
52#include <vm/pmap.h>
53#include <vm/vm_map.h>
54#include <vm/vm_extern.h>
55
56#include <i386/linux/linux.h>
57
58static int exec_linux_imgact(struct image_params *iparams);
59
60static int
61exec_linux_imgact(struct image_params *imgp)
62{
63 const struct exec *a_out = (const struct exec *) imgp->image_header;
64 struct vmspace *vmspace;
65 vm_offset_t vmaddr;
66 unsigned long virtual_offset, file_offset;
|
67 vm_offset_t buffer;
| |
68 unsigned long bss_size;
| 67 unsigned long bss_size;
|
| 68 ssize_t aresid;
|
69 int error;
70
71 if (((a_out->a_magic >> 16) & 0xff) != 0x64)
72 return -1;
73
74 /*
75 * Set file/virtual offset based on a.out variant.
76 */
77 switch ((int)(a_out->a_magic & 0xffff)) {
78 case 0413:
79 virtual_offset = 0;
80 file_offset = 1024;
81 break;
82 case 0314:
83 virtual_offset = 4096;
84 file_offset = 0;
85 break;
86 default:
87 return (-1);
88 }
89 bss_size = round_page(a_out->a_bss);
90#ifdef DEBUG
91 printf("imgact: text: %08lx, data: %08lx, bss: %08lx\n",
92 (u_long)a_out->a_text, (u_long)a_out->a_data, bss_size);
93#endif
94
95 /*
96 * Check various fields in header for validity/bounds.
97 */
98 if (a_out->a_entry < virtual_offset ||
99 a_out->a_entry >= virtual_offset + a_out->a_text ||
100 a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK)
101 return (-1);
102
103 /* text + data can't exceed file size */
104 if (a_out->a_data + a_out->a_text > imgp->attr->va_size)
105 return (EFAULT);
106 /*
107 * text/data/bss must not exceed limits
108 */
109 PROC_LOCK(imgp->proc);
110 if (a_out->a_text > maxtsiz ||
111 a_out->a_data + bss_size > lim_cur(imgp->proc, RLIMIT_DATA) ||
112 racct_set(imgp->proc, RACCT_DATA, a_out->a_data + bss_size) != 0) {
113 PROC_UNLOCK(imgp->proc);
114 return (ENOMEM);
115 }
116 PROC_UNLOCK(imgp->proc);
117
118 VOP_UNLOCK(imgp->vp, 0);
119
120 /*
121 * Destroy old process VM and create a new one (with a new stack)
122 */
123 error = exec_new_vmspace(imgp, &linux_sysvec);
124 if (error)
125 goto fail;
126 vmspace = imgp->proc->p_vmspace;
127
128 /*
129 * Check if file_offset page aligned,.
130 * Currently we cannot handle misaligned file offsets,
131 * and so we read in the entire image (what a waste).
132 */
133 if (file_offset & PAGE_MASK) {
134#ifdef DEBUG
135 printf("imgact: Non page aligned binary %lu\n", file_offset);
136#endif
137 /*
138 * Map text+data+bss read/write/execute
139 */
140 vmaddr = virtual_offset;
141 error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr,
142 a_out->a_text + a_out->a_data + bss_size, FALSE,
143 VM_PROT_ALL, VM_PROT_ALL, 0);
144 if (error)
145 goto fail;
146
| 69 int error;
70
71 if (((a_out->a_magic >> 16) & 0xff) != 0x64)
72 return -1;
73
74 /*
75 * Set file/virtual offset based on a.out variant.
76 */
77 switch ((int)(a_out->a_magic & 0xffff)) {
78 case 0413:
79 virtual_offset = 0;
80 file_offset = 1024;
81 break;
82 case 0314:
83 virtual_offset = 4096;
84 file_offset = 0;
85 break;
86 default:
87 return (-1);
88 }
89 bss_size = round_page(a_out->a_bss);
90#ifdef DEBUG
91 printf("imgact: text: %08lx, data: %08lx, bss: %08lx\n",
92 (u_long)a_out->a_text, (u_long)a_out->a_data, bss_size);
93#endif
94
95 /*
96 * Check various fields in header for validity/bounds.
97 */
98 if (a_out->a_entry < virtual_offset ||
99 a_out->a_entry >= virtual_offset + a_out->a_text ||
100 a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK)
101 return (-1);
102
103 /* text + data can't exceed file size */
104 if (a_out->a_data + a_out->a_text > imgp->attr->va_size)
105 return (EFAULT);
106 /*
107 * text/data/bss must not exceed limits
108 */
109 PROC_LOCK(imgp->proc);
110 if (a_out->a_text > maxtsiz ||
111 a_out->a_data + bss_size > lim_cur(imgp->proc, RLIMIT_DATA) ||
112 racct_set(imgp->proc, RACCT_DATA, a_out->a_data + bss_size) != 0) {
113 PROC_UNLOCK(imgp->proc);
114 return (ENOMEM);
115 }
116 PROC_UNLOCK(imgp->proc);
117
118 VOP_UNLOCK(imgp->vp, 0);
119
120 /*
121 * Destroy old process VM and create a new one (with a new stack)
122 */
123 error = exec_new_vmspace(imgp, &linux_sysvec);
124 if (error)
125 goto fail;
126 vmspace = imgp->proc->p_vmspace;
127
128 /*
129 * Check if file_offset page aligned,.
130 * Currently we cannot handle misaligned file offsets,
131 * and so we read in the entire image (what a waste).
132 */
133 if (file_offset & PAGE_MASK) {
134#ifdef DEBUG
135 printf("imgact: Non page aligned binary %lu\n", file_offset);
136#endif
137 /*
138 * Map text+data+bss read/write/execute
139 */
140 vmaddr = virtual_offset;
141 error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr,
142 a_out->a_text + a_out->a_data + bss_size, FALSE,
143 VM_PROT_ALL, VM_PROT_ALL, 0);
144 if (error)
145 goto fail;
146
|
147 error = vm_mmap(kernel_map, &buffer,
148 round_page(a_out->a_text + a_out->a_data + file_offset),
149 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE,
150 imgp->vp, trunc_page(file_offset));
151 if (error)
152 goto fail;
| 147 error = vn_rdwr(UIO_READ, imgp->vp, (void *)vmaddr, file_offset,
148 a_out->a_text + a_out->a_data, UIO_USERSPACE, 0,
149 curthread->td_ucred, NOCRED, &aresid, curthread);
150 if (error != 0)
151 goto fail;
152 if (aresid != 0) {
153 error = ENOEXEC;
154 goto fail;
155 }
|
153
| 156
|
154 error = copyout((void *)(uintptr_t)(buffer + file_offset),
155 (void *)vmaddr, a_out->a_text + a_out->a_data);
156
157 vm_map_remove(kernel_map, buffer,
158 buffer + round_page(a_out->a_text + a_out->a_data + file_offset));
159
160 if (error)
161 goto fail;
162
| |
163 /*
164 * remove write enable on the 'text' part
165 */
166 error = vm_map_protect(&vmspace->vm_map,
167 vmaddr,
168 vmaddr + a_out->a_text,
169 VM_PROT_EXECUTE|VM_PROT_READ,
170 TRUE);
171 if (error)
172 goto fail;
173 }
174 else {
175#ifdef DEBUG
176 printf("imgact: Page aligned binary %lu\n", file_offset);
177#endif
178 /*
179 * Map text+data read/execute
180 */
181 vmaddr = virtual_offset;
182 error = vm_mmap(&vmspace->vm_map, &vmaddr,
183 a_out->a_text + a_out->a_data,
184 VM_PROT_READ | VM_PROT_EXECUTE,
185 VM_PROT_ALL,
186 MAP_PRIVATE | MAP_FIXED,
187 OBJT_VNODE,
188 imgp->vp, file_offset);
189 if (error)
190 goto fail;
191
192#ifdef DEBUG
193 printf("imgact: startaddr=%08lx, length=%08lx\n",
194 (u_long)vmaddr, (u_long)a_out->a_text + (u_long)a_out->a_data);
195#endif
196 /*
197 * allow read/write of data
198 */
199 error = vm_map_protect(&vmspace->vm_map,
200 vmaddr + a_out->a_text,
201 vmaddr + a_out->a_text + a_out->a_data,
202 VM_PROT_ALL,
203 FALSE);
204 if (error)
205 goto fail;
206
207 /*
208 * Allocate anon demand-zeroed area for uninitialized data
209 */
210 if (bss_size != 0) {
211 vmaddr = virtual_offset + a_out->a_text + a_out->a_data;
212 error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr,
213 bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
214 if (error)
215 goto fail;
216#ifdef DEBUG
217 printf("imgact: bssaddr=%08lx, length=%08lx\n",
218 (u_long)vmaddr, bss_size);
219#endif
220
221 }
222 }
223 /* Fill in process VM information */
224 vmspace->vm_tsize = round_page(a_out->a_text) >> PAGE_SHIFT;
225 vmspace->vm_dsize = round_page(a_out->a_data + bss_size) >> PAGE_SHIFT;
226 vmspace->vm_taddr = (caddr_t)(void *)(uintptr_t)virtual_offset;
227 vmspace->vm_daddr = (caddr_t)(void *)(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 = &linux_sysvec;
235
236fail:
237 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY);
238 return (error);
239}
240
241/*
242 * Tell kern_execve.c about it, with a little help from the linker.
243 */
244static struct execsw linux_execsw = { exec_linux_imgact, "linux a.out" };
245EXEC_SET(linuxaout, linux_execsw);
| 157 /*
158 * remove write enable on the 'text' part
159 */
160 error = vm_map_protect(&vmspace->vm_map,
161 vmaddr,
162 vmaddr + a_out->a_text,
163 VM_PROT_EXECUTE|VM_PROT_READ,
164 TRUE);
165 if (error)
166 goto fail;
167 }
168 else {
169#ifdef DEBUG
170 printf("imgact: Page aligned binary %lu\n", file_offset);
171#endif
172 /*
173 * Map text+data read/execute
174 */
175 vmaddr = virtual_offset;
176 error = vm_mmap(&vmspace->vm_map, &vmaddr,
177 a_out->a_text + a_out->a_data,
178 VM_PROT_READ | VM_PROT_EXECUTE,
179 VM_PROT_ALL,
180 MAP_PRIVATE | MAP_FIXED,
181 OBJT_VNODE,
182 imgp->vp, file_offset);
183 if (error)
184 goto fail;
185
186#ifdef DEBUG
187 printf("imgact: startaddr=%08lx, length=%08lx\n",
188 (u_long)vmaddr, (u_long)a_out->a_text + (u_long)a_out->a_data);
189#endif
190 /*
191 * allow read/write of data
192 */
193 error = vm_map_protect(&vmspace->vm_map,
194 vmaddr + a_out->a_text,
195 vmaddr + a_out->a_text + a_out->a_data,
196 VM_PROT_ALL,
197 FALSE);
198 if (error)
199 goto fail;
200
201 /*
202 * Allocate anon demand-zeroed area for uninitialized data
203 */
204 if (bss_size != 0) {
205 vmaddr = virtual_offset + a_out->a_text + a_out->a_data;
206 error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr,
207 bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
208 if (error)
209 goto fail;
210#ifdef DEBUG
211 printf("imgact: bssaddr=%08lx, length=%08lx\n",
212 (u_long)vmaddr, bss_size);
213#endif
214
215 }
216 }
217 /* Fill in process VM information */
218 vmspace->vm_tsize = round_page(a_out->a_text) >> PAGE_SHIFT;
219 vmspace->vm_dsize = round_page(a_out->a_data + bss_size) >> PAGE_SHIFT;
220 vmspace->vm_taddr = (caddr_t)(void *)(uintptr_t)virtual_offset;
221 vmspace->vm_daddr = (caddr_t)(void *)(uintptr_t)
222 (virtual_offset + a_out->a_text);
223
224 /* Fill in image_params */
225 imgp->interpreted = 0;
226 imgp->entry_addr = a_out->a_entry;
227
228 imgp->proc->p_sysent = &linux_sysvec;
229
230fail:
231 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY);
232 return (error);
233}
234
235/*
236 * Tell kern_execve.c about it, with a little help from the linker.
237 */
238static struct execsw linux_execsw = { exec_linux_imgact, "linux a.out" };
239EXEC_SET(linuxaout, linux_execsw);
|