1/*- 2 * Copyright (c) 1998 Mark Newton 3 * Copyright (c) 1994-1996 S�ren Schmidt 4 * All rights reserved. 5 * 6 * Based heavily on /sys/kern/imgact_aout.c which is: 7 * Copyright (c) 1993, David Greenman 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer 14 * in this position and unchanged. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h>
| 1/*- 2 * Copyright (c) 1998 Mark Newton 3 * Copyright (c) 1994-1996 S�ren Schmidt 4 * All rights reserved. 5 * 6 * Based heavily on /sys/kern/imgact_aout.c which is: 7 * Copyright (c) 1993, David Greenman 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer 14 * in this position and unchanged. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h>
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112 PROC_UNLOCK(imgp->proc); 113 return (ENOMEM); 114 } 115 PROC_UNLOCK(imgp->proc); 116 117 VOP_UNLOCK(imgp->vp, 0); 118 119 /* 120 * Destroy old process VM and create a new one (with a new stack) 121 */ 122 error = exec_new_vmspace(imgp, &svr4_sysvec); 123 if (error) 124 goto fail; 125 vmspace = imgp->proc->p_vmspace; 126 127 /* 128 * Check if file_offset page aligned,. 129 * Currently we cannot handle misalinged file offsets, 130 * and so we read in the entire image (what a waste). 131 */ 132 if (file_offset & PAGE_MASK) { 133#ifdef DEBUG 134 printf("imgact: Non page aligned binary %lu\n", file_offset); 135#endif 136 /* 137 * Map text+data+bss read/write/execute 138 */ 139 vmaddr = virtual_offset; 140 error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr, 141 a_out->a_text + a_out->a_data + bss_size, FALSE, 142 VM_PROT_ALL, VM_PROT_ALL, 0); 143 if (error) 144 goto fail; 145 146 error = vm_mmap(kernel_map, &buffer, 147 round_page(a_out->a_text + a_out->a_data + file_offset), 148 VM_PROT_READ, VM_PROT_READ, 0, 149 OBJT_VNODE, imgp->vp, trunc_page(file_offset)); 150 if (error) 151 goto fail; 152 153 error = copyout((caddr_t)(buffer + file_offset), (caddr_t)vmaddr, 154 a_out->a_text + a_out->a_data); 155 156 vm_map_remove(kernel_map, buffer, 157 buffer + round_page(a_out->a_text + a_out->a_data + file_offset)); 158 159 if (error) 160 goto fail; 161 162 /* 163 * remove write enable on the 'text' part 164 */ 165 error = vm_map_protect(&vmspace->vm_map, 166 vmaddr, 167 vmaddr + a_out->a_text, 168 VM_PROT_EXECUTE|VM_PROT_READ, 169 TRUE); 170 if (error) 171 goto fail; 172 } 173 else { 174#ifdef DEBUG 175 printf("imgact: Page aligned binary %lu\n", file_offset); 176#endif 177 /* 178 * Map text+data read/execute 179 */ 180 vmaddr = virtual_offset; 181 error = vm_mmap(&vmspace->vm_map, &vmaddr, 182 a_out->a_text + a_out->a_data, 183 VM_PROT_READ | VM_PROT_EXECUTE, 184 VM_PROT_ALL, 185 MAP_PRIVATE | MAP_FIXED, 186 OBJT_VNODE, imgp->vp, file_offset); 187 if (error) 188 goto fail; 189 190#ifdef DEBUG 191 printf("imgact: startaddr=%08lx, length=%08lx\n", (u_long)vmaddr, 192 (u_long)a_out->a_text + a_out->a_data); 193#endif 194 /* 195 * allow read/write of data 196 */ 197 error = vm_map_protect(&vmspace->vm_map, 198 vmaddr + a_out->a_text, 199 vmaddr + a_out->a_text + a_out->a_data, 200 VM_PROT_ALL, 201 FALSE); 202 if (error) 203 goto fail; 204 205 /* 206 * Allocate anon demand-zeroed area for uninitialized data 207 */ 208 if (bss_size != 0) { 209 vmaddr = virtual_offset + a_out->a_text + a_out->a_data; 210 error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr, 211 bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0); 212 if (error) 213 goto fail; 214#ifdef DEBUG 215 printf("imgact: bssaddr=%08lx, length=%08lx\n", 216 (u_long)vmaddr, bss_size); 217#endif 218 219 } 220 } 221 /* Fill in process VM information */ 222 vmspace->vm_tsize = round_page(a_out->a_text) >> PAGE_SHIFT; 223 vmspace->vm_dsize = round_page(a_out->a_data + bss_size) >> PAGE_SHIFT; 224 vmspace->vm_taddr = (caddr_t)virtual_offset; 225 vmspace->vm_daddr = (caddr_t)virtual_offset + a_out->a_text; 226 227 /* Fill in image_params */ 228 imgp->interpreted = 0; 229 imgp->entry_addr = a_out->a_entry; 230 231 imgp->proc->p_sysent = &svr4_sysvec; 232fail: 233 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY); 234 return (error); 235} 236 237/* 238 * Tell kern_execve.c about it, with a little help from the linker. 239 */ 240struct execsw svr4_execsw = { exec_svr4_imgact, "svr4 ELF" }; 241EXEC_SET(execsw_set, svr4_execsw); 242
| 114 PROC_UNLOCK(imgp->proc); 115 return (ENOMEM); 116 } 117 PROC_UNLOCK(imgp->proc); 118 119 VOP_UNLOCK(imgp->vp, 0); 120 121 /* 122 * Destroy old process VM and create a new one (with a new stack) 123 */ 124 error = exec_new_vmspace(imgp, &svr4_sysvec); 125 if (error) 126 goto fail; 127 vmspace = imgp->proc->p_vmspace; 128 129 /* 130 * Check if file_offset page aligned,. 131 * Currently we cannot handle misalinged file offsets, 132 * and so we read in the entire image (what a waste). 133 */ 134 if (file_offset & PAGE_MASK) { 135#ifdef DEBUG 136 printf("imgact: Non page aligned binary %lu\n", file_offset); 137#endif 138 /* 139 * Map text+data+bss read/write/execute 140 */ 141 vmaddr = virtual_offset; 142 error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr, 143 a_out->a_text + a_out->a_data + bss_size, FALSE, 144 VM_PROT_ALL, VM_PROT_ALL, 0); 145 if (error) 146 goto fail; 147 148 error = vm_mmap(kernel_map, &buffer, 149 round_page(a_out->a_text + a_out->a_data + file_offset), 150 VM_PROT_READ, VM_PROT_READ, 0, 151 OBJT_VNODE, imgp->vp, trunc_page(file_offset)); 152 if (error) 153 goto fail; 154 155 error = copyout((caddr_t)(buffer + file_offset), (caddr_t)vmaddr, 156 a_out->a_text + a_out->a_data); 157 158 vm_map_remove(kernel_map, buffer, 159 buffer + round_page(a_out->a_text + a_out->a_data + file_offset)); 160 161 if (error) 162 goto fail; 163 164 /* 165 * remove write enable on the 'text' part 166 */ 167 error = vm_map_protect(&vmspace->vm_map, 168 vmaddr, 169 vmaddr + a_out->a_text, 170 VM_PROT_EXECUTE|VM_PROT_READ, 171 TRUE); 172 if (error) 173 goto fail; 174 } 175 else { 176#ifdef DEBUG 177 printf("imgact: Page aligned binary %lu\n", file_offset); 178#endif 179 /* 180 * Map text+data read/execute 181 */ 182 vmaddr = virtual_offset; 183 error = vm_mmap(&vmspace->vm_map, &vmaddr, 184 a_out->a_text + a_out->a_data, 185 VM_PROT_READ | VM_PROT_EXECUTE, 186 VM_PROT_ALL, 187 MAP_PRIVATE | MAP_FIXED, 188 OBJT_VNODE, imgp->vp, file_offset); 189 if (error) 190 goto fail; 191 192#ifdef DEBUG 193 printf("imgact: startaddr=%08lx, length=%08lx\n", (u_long)vmaddr, 194 (u_long)a_out->a_text + 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)virtual_offset; 227 vmspace->vm_daddr = (caddr_t)virtual_offset + a_out->a_text; 228 229 /* Fill in image_params */ 230 imgp->interpreted = 0; 231 imgp->entry_addr = a_out->a_entry; 232 233 imgp->proc->p_sysent = &svr4_sysvec; 234fail: 235 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY); 236 return (error); 237} 238 239/* 240 * Tell kern_execve.c about it, with a little help from the linker. 241 */ 242struct execsw svr4_execsw = { exec_svr4_imgact, "svr4 ELF" }; 243EXEC_SET(execsw_set, svr4_execsw); 244
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