| imgact_linux.c (101308) | imgact_linux.c (101771) |
|---|---|
| 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 --- 14 unchanged lines hidden (view full) --- 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 --- 14 unchanged lines hidden (view full) --- 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 * $FreeBSD: head/sys/i386/linux/imgact_linux.c 101308 2002-08-04 10:29:36Z jeff $ | 31 * $FreeBSD: head/sys/i386/linux/imgact_linux.c 101771 2002-08-13 06:55:28Z jeff $ |
| 32 */ 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/exec.h> 37#include <sys/imgact.h> 38#include <sys/imgact_aout.h> 39#include <sys/kernel.h> --- 20 unchanged lines hidden (view full) --- 60 struct image_params *imgp; 61{ 62 const struct exec *a_out = (const struct exec *) imgp->image_header; 63 struct vmspace *vmspace; 64 vm_offset_t vmaddr; 65 unsigned long virtual_offset, file_offset; 66 vm_offset_t buffer; 67 unsigned long bss_size; | 32 */ 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/exec.h> 37#include <sys/imgact.h> 38#include <sys/imgact_aout.h> 39#include <sys/kernel.h> --- 20 unchanged lines hidden (view full) --- 60 struct image_params *imgp; 61{ 62 const struct exec *a_out = (const struct exec *) imgp->image_header; 63 struct vmspace *vmspace; 64 vm_offset_t vmaddr; 65 unsigned long virtual_offset, file_offset; 66 vm_offset_t buffer; 67 unsigned long bss_size; |
| 68 struct thread *td = curthread; |
|
| 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 */ --- 29 unchanged lines hidden (view full) --- 105 /* 106 * text/data/bss must not exceed limits 107 */ 108 mtx_assert(&Giant, MA_OWNED); 109 if (a_out->a_text > maxtsiz || 110 a_out->a_data + bss_size > imgp->proc->p_rlimit[RLIMIT_DATA].rlim_cur) 111 return (ENOMEM); 112 | 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 */ --- 29 unchanged lines hidden (view full) --- 106 /* 107 * text/data/bss must not exceed limits 108 */ 109 mtx_assert(&Giant, MA_OWNED); 110 if (a_out->a_text > maxtsiz || 111 a_out->a_data + bss_size > imgp->proc->p_rlimit[RLIMIT_DATA].rlim_cur) 112 return (ENOMEM); 113 |
| 114 VOP_UNLOCK(imgp->vp, 0, td); 115 |
|
| 113 /* copy in arguments and/or environment from old process */ 114 error = exec_extract_strings(imgp); 115 if (error) | 116 /* copy in arguments and/or environment from old process */ 117 error = exec_extract_strings(imgp); 118 if (error) |
| 116 return (error); | 119 goto fail; |
| 117 118 /* 119 * Destroy old process VM and create a new one (with a new stack) 120 */ 121 exec_new_vmspace(imgp, VM_MIN_ADDRESS, VM_MAXUSER_ADDRESS, USRSTACK); 122 vmspace = imgp->proc->p_vmspace; 123 124 /* --- 8 unchanged lines hidden (view full) --- 133 /* 134 * Map text+data+bss read/write/execute 135 */ 136 vmaddr = virtual_offset; 137 error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr, 138 a_out->a_text + a_out->a_data + bss_size, FALSE, 139 VM_PROT_ALL, VM_PROT_ALL, 0); 140 if (error) | 120 121 /* 122 * Destroy old process VM and create a new one (with a new stack) 123 */ 124 exec_new_vmspace(imgp, VM_MIN_ADDRESS, VM_MAXUSER_ADDRESS, USRSTACK); 125 vmspace = imgp->proc->p_vmspace; 126 127 /* --- 8 unchanged lines hidden (view full) --- 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) |
| 141 return error; | 144 goto fail; |
| 142 143 error = vm_mmap(kernel_map, &buffer, 144 round_page(a_out->a_text + a_out->a_data + file_offset), 145 VM_PROT_READ, VM_PROT_READ, 0, 146 (caddr_t) imgp->vp, trunc_page(file_offset)); 147 if (error) | 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 (caddr_t) imgp->vp, trunc_page(file_offset)); 150 if (error) |
| 148 return error; | 151 goto fail; |
| 149 150 error = copyout((caddr_t)(void *)(uintptr_t)(buffer + file_offset), 151 (caddr_t)vmaddr, a_out->a_text + a_out->a_data); 152 153 vm_map_remove(kernel_map, buffer, 154 buffer + round_page(a_out->a_text + a_out->a_data + file_offset)); 155 156 if (error) | 152 153 error = copyout((caddr_t)(void *)(uintptr_t)(buffer + file_offset), 154 (caddr_t)vmaddr, 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) |
| 157 return error; | 160 goto fail; |
| 158 159 /* 160 * remove write enable on the 'text' part 161 */ 162 error = vm_map_protect(&vmspace->vm_map, 163 vmaddr, 164 vmaddr + a_out->a_text, 165 VM_PROT_EXECUTE|VM_PROT_READ, 166 TRUE); 167 if (error) | 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) |
| 168 return error; | 171 goto fail; |
| 169 } 170 else { 171#ifdef DEBUG 172 printf("imgact: Page aligned binary %lu\n", file_offset); 173#endif 174 /* 175 * Map text+data read/execute 176 */ 177 vmaddr = virtual_offset; 178 error = vm_mmap(&vmspace->vm_map, &vmaddr, 179 a_out->a_text + a_out->a_data, 180 VM_PROT_READ | VM_PROT_EXECUTE, 181 VM_PROT_ALL, 182 MAP_PRIVATE | MAP_FIXED, 183 (caddr_t)imgp->vp, file_offset); 184 if (error) | 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 (caddr_t)imgp->vp, file_offset); 187 if (error) |
| 185 return (error); | 188 goto fail; |
| 186 187#ifdef DEBUG 188 printf("imgact: startaddr=%08lx, length=%08lx\n", 189 (u_long)vmaddr, a_out->a_text + a_out->a_data); 190#endif 191 /* 192 * allow read/write of data 193 */ 194 error = vm_map_protect(&vmspace->vm_map, 195 vmaddr + a_out->a_text, 196 vmaddr + a_out->a_text + a_out->a_data, 197 VM_PROT_ALL, 198 FALSE); 199 if (error) | 189 190#ifdef DEBUG 191 printf("imgact: startaddr=%08lx, length=%08lx\n", 192 (u_long)vmaddr, 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) |
| 200 return (error); | 203 goto fail; |
| 201 202 /* 203 * Allocate anon demand-zeroed area for uninitialized data 204 */ 205 if (bss_size != 0) { 206 vmaddr = virtual_offset + a_out->a_text + a_out->a_data; 207 error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr, 208 bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0); 209 if (error) | 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) |
| 210 return (error); | 213 goto fail; |
| 211#ifdef DEBUG 212 printf("imgact: bssaddr=%08lx, length=%08lx\n", 213 (u_long)vmaddr, bss_size); 214#endif 215 216 } 217 /* Indicate that this file should not be modified */ 218 mp_fixme("Unlocked v_flag access"); --- 6 unchanged lines hidden (view full) --- 225 vmspace->vm_daddr = (caddr_t)(void *)(uintptr_t) 226 (virtual_offset + a_out->a_text); 227 228 /* Fill in image_params */ 229 imgp->interpreted = 0; 230 imgp->entry_addr = a_out->a_entry; 231 232 imgp->proc->p_sysent = &linux_sysvec; | 214#ifdef DEBUG 215 printf("imgact: bssaddr=%08lx, length=%08lx\n", 216 (u_long)vmaddr, bss_size); 217#endif 218 219 } 220 /* Indicate that this file should not be modified */ 221 mp_fixme("Unlocked v_flag access"); --- 6 unchanged lines hidden (view full) --- 228 vmspace->vm_daddr = (caddr_t)(void *)(uintptr_t) 229 (virtual_offset + a_out->a_text); 230 231 /* Fill in image_params */ 232 imgp->interpreted = 0; 233 imgp->entry_addr = a_out->a_entry; 234 235 imgp->proc->p_sysent = &linux_sysvec; |
| 233 return (0); | 236 237fail: 238 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY, td); 239 return (error); |
| 234} 235 236/* 237 * Tell kern_execve.c about it, with a little help from the linker. 238 */ 239static struct execsw linux_execsw = { exec_linux_imgact, "linux a.out" }; 240EXEC_SET(linuxaout, linux_execsw); | 240} 241 242/* 243 * Tell kern_execve.c about it, with a little help from the linker. 244 */ 245static struct execsw linux_execsw = { exec_linux_imgact, "linux a.out" }; 246EXEC_SET(linuxaout, linux_execsw); |