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 withough 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 *
| 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 withough 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 *
|
43
44#include <vm/vm.h>
45#include <vm/vm_kern.h>
46#include <vm/vm_param.h>
47#include <vm/pmap.h>
48#include <vm/lock.h>
49#include <vm/vm_map.h>
50#include <vm/vm_prot.h>
51#include <vm/vm_extern.h>
52
53#include <i386/linux/linux.h>
54#include <i386/linux/linux_proto.h>
55
56extern int exec_linux_imgact __P((struct image_params *iparams));
57
58int
59exec_linux_imgact(imgp)
60 struct image_params *imgp;
61{
62 struct exec *a_out = (struct exec *) imgp->image_header;
63 struct vmspace *vmspace = imgp->proc->p_vmspace;
64 vm_offset_t vmaddr;
65 unsigned long virtual_offset, file_offset;
66 vm_offset_t buffer;
67 unsigned long bss_size;
68 int error;
69
70 if (((a_out->a_magic >> 16) & 0xff) != 0x64)
71 return -1;
72
73 /*
74 * Set file/virtual offset based on a.out variant.
75 */
76 switch ((int)(a_out->a_magic & 0xffff)) {
77 case 0413:
78 virtual_offset = 0;
79 file_offset = 1024;
80 break;
81 case 0314:
82 virtual_offset = 4096;
83 file_offset = 0;
84 break;
85 default:
86 return (-1);
87 }
88 bss_size = round_page(a_out->a_bss);
89#ifdef DEBUG
90 printf("imgact: text: %08x, data: %08x, bss: %08x\n", a_out->a_text, a_out->a_data, bss_size);
91#endif
92
93 /*
94 * Check various fields in header for validity/bounds.
95 */
96 if (a_out->a_entry < virtual_offset ||
97 a_out->a_entry >= virtual_offset + a_out->a_text ||
98 a_out->a_text % NBPG || a_out->a_data % NBPG)
99 return (-1);
100
101 /* text + data can't exceed file size */
102 if (a_out->a_data + a_out->a_text > imgp->attr->va_size)
103 return (EFAULT);
104 /*
105 * text/data/bss must not exceed limits
106 */
107 if (a_out->a_text > MAXTSIZ || a_out->a_data + bss_size > MAXDSIZ ||
108 a_out->a_data+bss_size > imgp->proc->p_rlimit[RLIMIT_DATA].rlim_cur)
109 return (ENOMEM);
110
111 /* copy in arguments and/or environment from old process */
112 error = exec_extract_strings(imgp);
113 if (error)
114 return (error);
115
116 /*
117 * Destroy old process VM and create a new one (with a new stack)
118 */
119 exec_new_vmspace(imgp);
120
121 /*
122 * Check if file_offset page aligned,.
123 * Currently we cannot handle misalinged file offsets,
124 * and so we read in the entire image (what a waste).
125 */
126 if (file_offset & PGOFSET) {
127#ifdef DEBUG
128 printf("imgact: Non page aligned binary %d\n", file_offset);
129#endif
130 /*
131 * Map text+data+bss read/write/execute
132 */
133 vmaddr = virtual_offset;
134 error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr,
135 a_out->a_text + a_out->a_data + bss_size, FALSE,
136 VM_PROT_ALL, VM_PROT_ALL, 0);
137 if (error)
138 return error;
139
140 error = vm_mmap(kernel_map, &buffer,
141 round_page(a_out->a_text + a_out->a_data + file_offset),
142 VM_PROT_READ, VM_PROT_READ, 0,
143 (caddr_t) imgp->vp, trunc_page(file_offset));
144 if (error)
145 return error;
146
147 error = copyout((caddr_t)(buffer + file_offset), (caddr_t)vmaddr,
148 a_out->a_text + a_out->a_data);
149
150 vm_map_remove(kernel_map, buffer,
151 buffer + round_page(a_out->a_text + a_out->a_data + file_offset));
152
153 if (error)
154 return error;
155
156 /*
157 * remove write enable on the 'text' part
158 */
159 error = vm_map_protect(&vmspace->vm_map,
160 vmaddr,
161 vmaddr + a_out->a_text,
162 VM_PROT_EXECUTE|VM_PROT_READ,
163 TRUE);
164 if (error)
165 return error;
166 }
167 else {
168#ifdef DEBUG
169 printf("imgact: Page aligned binary %d\n", file_offset);
170#endif
171 /*
172 * Map text+data read/execute
173 */
174 vmaddr = virtual_offset;
175 error = vm_mmap(&vmspace->vm_map, &vmaddr,
176 a_out->a_text + a_out->a_data,
177 VM_PROT_READ | VM_PROT_EXECUTE,
178 VM_PROT_ALL,
179 MAP_PRIVATE | MAP_FIXED,
180 (caddr_t)imgp->vp, file_offset);
181 if (error)
182 return (error);
183
184#ifdef DEBUG
185 printf("imgact: startaddr=%08x, length=%08x\n", vmaddr, a_out->a_text + a_out->a_data);
186#endif
187 /*
188 * allow read/write of data
189 */
190 error = vm_map_protect(&vmspace->vm_map,
191 vmaddr + a_out->a_text,
192 vmaddr + a_out->a_text + a_out->a_data,
193 VM_PROT_ALL,
194 FALSE);
195 if (error)
196 return (error);
197
198 /*
199 * Allocate anon demand-zeroed area for uninitialized data
200 */
201 if (bss_size != 0) {
202 vmaddr = virtual_offset + a_out->a_text + a_out->a_data;
203 error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr,
204 bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
205 if (error)
206 return (error);
207#ifdef DEBUG
208 printf("imgact: bssaddr=%08x, length=%08x\n", vmaddr, bss_size);
209#endif
210
211 }
212 /* Indicate that this file should not be modified */
213 imgp->vp->v_flag |= VTEXT;
214 }
215 /* Fill in process VM information */
216 vmspace->vm_tsize = round_page(a_out->a_text) >> PAGE_SHIFT;
217 vmspace->vm_dsize = round_page(a_out->a_data + bss_size) >> PAGE_SHIFT;
218 vmspace->vm_taddr = (caddr_t)virtual_offset;
219 vmspace->vm_daddr = (caddr_t)virtual_offset + a_out->a_text;
220
221 /* Fill in image_params */
222 imgp->interpreted = 0;
223 imgp->entry_addr = a_out->a_entry;
224
225 imgp->proc->p_sysent = &linux_sysvec;
226 return (0);
227}
228
229/*
230 * Tell kern_execve.c about it, with a little help from the linker.
231 * Since `const' objects end up in the text segment, TEXT_SET is the
232 * correct directive to use.
233 */
234const struct execsw linux_execsw = { exec_linux_imgact, "linux a.out" };
235TEXT_SET(execsw_set, linux_execsw);
236
| 45
46#include <vm/vm.h>
47#include <vm/vm_kern.h>
48#include <vm/vm_param.h>
49#include <vm/pmap.h>
50#include <vm/lock.h>
51#include <vm/vm_map.h>
52#include <vm/vm_prot.h>
53#include <vm/vm_extern.h>
54
55#include <i386/linux/linux.h>
56#include <i386/linux/linux_proto.h>
57
58extern int exec_linux_imgact __P((struct image_params *iparams));
59
60int
61exec_linux_imgact(imgp)
62 struct image_params *imgp;
63{
64 struct exec *a_out = (struct exec *) imgp->image_header;
65 struct vmspace *vmspace = imgp->proc->p_vmspace;
66 vm_offset_t vmaddr;
67 unsigned long virtual_offset, file_offset;
68 vm_offset_t buffer;
69 unsigned long bss_size;
70 int error;
71
72 if (((a_out->a_magic >> 16) & 0xff) != 0x64)
73 return -1;
74
75 /*
76 * Set file/virtual offset based on a.out variant.
77 */
78 switch ((int)(a_out->a_magic & 0xffff)) {
79 case 0413:
80 virtual_offset = 0;
81 file_offset = 1024;
82 break;
83 case 0314:
84 virtual_offset = 4096;
85 file_offset = 0;
86 break;
87 default:
88 return (-1);
89 }
90 bss_size = round_page(a_out->a_bss);
91#ifdef DEBUG
92 printf("imgact: text: %08x, data: %08x, bss: %08x\n", a_out->a_text, 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 % NBPG || a_out->a_data % NBPG)
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 if (a_out->a_text > MAXTSIZ || a_out->a_data + bss_size > MAXDSIZ ||
110 a_out->a_data+bss_size > imgp->proc->p_rlimit[RLIMIT_DATA].rlim_cur)
111 return (ENOMEM);
112
113 /* copy in arguments and/or environment from old process */
114 error = exec_extract_strings(imgp);
115 if (error)
116 return (error);
117
118 /*
119 * Destroy old process VM and create a new one (with a new stack)
120 */
121 exec_new_vmspace(imgp);
122
123 /*
124 * Check if file_offset page aligned,.
125 * Currently we cannot handle misalinged file offsets,
126 * and so we read in the entire image (what a waste).
127 */
128 if (file_offset & PGOFSET) {
129#ifdef DEBUG
130 printf("imgact: Non page aligned binary %d\n", file_offset);
131#endif
132 /*
133 * Map text+data+bss read/write/execute
134 */
135 vmaddr = virtual_offset;
136 error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr,
137 a_out->a_text + a_out->a_data + bss_size, FALSE,
138 VM_PROT_ALL, VM_PROT_ALL, 0);
139 if (error)
140 return error;
141
142 error = vm_mmap(kernel_map, &buffer,
143 round_page(a_out->a_text + a_out->a_data + file_offset),
144 VM_PROT_READ, VM_PROT_READ, 0,
145 (caddr_t) imgp->vp, trunc_page(file_offset));
146 if (error)
147 return error;
148
149 error = copyout((caddr_t)(buffer + file_offset), (caddr_t)vmaddr,
150 a_out->a_text + a_out->a_data);
151
152 vm_map_remove(kernel_map, buffer,
153 buffer + round_page(a_out->a_text + a_out->a_data + file_offset));
154
155 if (error)
156 return error;
157
158 /*
159 * remove write enable on the 'text' part
160 */
161 error = vm_map_protect(&vmspace->vm_map,
162 vmaddr,
163 vmaddr + a_out->a_text,
164 VM_PROT_EXECUTE|VM_PROT_READ,
165 TRUE);
166 if (error)
167 return error;
168 }
169 else {
170#ifdef DEBUG
171 printf("imgact: Page aligned binary %d\n", file_offset);
172#endif
173 /*
174 * Map text+data read/execute
175 */
176 vmaddr = virtual_offset;
177 error = vm_mmap(&vmspace->vm_map, &vmaddr,
178 a_out->a_text + a_out->a_data,
179 VM_PROT_READ | VM_PROT_EXECUTE,
180 VM_PROT_ALL,
181 MAP_PRIVATE | MAP_FIXED,
182 (caddr_t)imgp->vp, file_offset);
183 if (error)
184 return (error);
185
186#ifdef DEBUG
187 printf("imgact: startaddr=%08x, length=%08x\n", vmaddr, a_out->a_text + a_out->a_data);
188#endif
189 /*
190 * allow read/write of data
191 */
192 error = vm_map_protect(&vmspace->vm_map,
193 vmaddr + a_out->a_text,
194 vmaddr + a_out->a_text + a_out->a_data,
195 VM_PROT_ALL,
196 FALSE);
197 if (error)
198 return (error);
199
200 /*
201 * Allocate anon demand-zeroed area for uninitialized data
202 */
203 if (bss_size != 0) {
204 vmaddr = virtual_offset + a_out->a_text + a_out->a_data;
205 error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr,
206 bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
207 if (error)
208 return (error);
209#ifdef DEBUG
210 printf("imgact: bssaddr=%08x, length=%08x\n", vmaddr, bss_size);
211#endif
212
213 }
214 /* Indicate that this file should not be modified */
215 imgp->vp->v_flag |= VTEXT;
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)virtual_offset;
221 vmspace->vm_daddr = (caddr_t)virtual_offset + a_out->a_text;
222
223 /* Fill in image_params */
224 imgp->interpreted = 0;
225 imgp->entry_addr = a_out->a_entry;
226
227 imgp->proc->p_sysent = &linux_sysvec;
228 return (0);
229}
230
231/*
232 * Tell kern_execve.c about it, with a little help from the linker.
233 * Since `const' objects end up in the text segment, TEXT_SET is the
234 * correct directive to use.
235 */
236const struct execsw linux_execsw = { exec_linux_imgact, "linux a.out" };
237TEXT_SET(execsw_set, linux_execsw);
238
|