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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * a.out loader for x86-64 | |
3 | * | |
4 | * Copyright (C) 1991, 1992, 1996 Linus Torvalds | |
5 | * Hacked together by Andi Kleen | |
6 | */ | |
7 | ||
8 | #include <linux/module.h> | |
9 | ||
10 | #include <linux/time.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/mm.h> | |
13 | #include <linux/mman.h> | |
14 | #include <linux/a.out.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/signal.h> | |
17 | #include <linux/string.h> | |
18 | #include <linux/fs.h> | |
19 | #include <linux/file.h> | |
20 | #include <linux/stat.h> | |
21 | #include <linux/fcntl.h> | |
22 | #include <linux/ptrace.h> | |
23 | #include <linux/user.h> | |
1da177e4 LT |
24 | #include <linux/binfmts.h> |
25 | #include <linux/personality.h> | |
26 | #include <linux/init.h> | |
e5fc3161 | 27 | #include <linux/jiffies.h> |
1da177e4 LT |
28 | |
29 | #include <asm/system.h> | |
30 | #include <asm/uaccess.h> | |
31 | #include <asm/pgalloc.h> | |
32 | #include <asm/cacheflush.h> | |
33 | #include <asm/user32.h> | |
34 | #include <asm/ia32.h> | |
35 | ||
36 | #undef WARN_OLD | |
37 | #undef CORE_DUMP /* probably broken */ | |
38 | ||
8edf8bee TG |
39 | static int load_aout_binary(struct linux_binprm *, struct pt_regs *regs); |
40 | static int load_aout_library(struct file *); | |
1da177e4 | 41 | |
44456d37 | 42 | #ifdef CORE_DUMP |
8edf8bee TG |
43 | static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file, |
44 | unsigned long limit); | |
1da177e4 LT |
45 | |
46 | /* | |
47 | * fill in the user structure for a core dump.. | |
48 | */ | |
8edf8bee | 49 | static void dump_thread32(struct pt_regs *regs, struct user32 *dump) |
1da177e4 | 50 | { |
8edf8bee | 51 | u32 fs, gs; |
1da177e4 LT |
52 | |
53 | /* changed the size calculations - should hopefully work better. lbt */ | |
54 | dump->magic = CMAGIC; | |
55 | dump->start_code = 0; | |
65ea5b03 | 56 | dump->start_stack = regs->sp & ~(PAGE_SIZE - 1); |
1da177e4 | 57 | dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT; |
8edf8bee TG |
58 | dump->u_dsize = ((unsigned long) |
59 | (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT; | |
1da177e4 LT |
60 | dump->u_dsize -= dump->u_tsize; |
61 | dump->u_ssize = 0; | |
8edf8bee TG |
62 | dump->u_debugreg[0] = current->thread.debugreg0; |
63 | dump->u_debugreg[1] = current->thread.debugreg1; | |
64 | dump->u_debugreg[2] = current->thread.debugreg2; | |
65 | dump->u_debugreg[3] = current->thread.debugreg3; | |
66 | dump->u_debugreg[4] = 0; | |
67 | dump->u_debugreg[5] = 0; | |
68 | dump->u_debugreg[6] = current->thread.debugreg6; | |
69 | dump->u_debugreg[7] = current->thread.debugreg7; | |
70 | ||
71 | if (dump->start_stack < 0xc0000000) { | |
72 | unsigned long tmp; | |
73 | ||
74 | tmp = (unsigned long) (0xc0000000 - dump->start_stack); | |
75 | dump->u_ssize = tmp >> PAGE_SHIFT; | |
76 | } | |
1da177e4 | 77 | |
65ea5b03 PA |
78 | dump->regs.bx = regs->bx; |
79 | dump->regs.cx = regs->cx; | |
80 | dump->regs.dx = regs->dx; | |
81 | dump->regs.si = regs->si; | |
82 | dump->regs.di = regs->di; | |
83 | dump->regs.bp = regs->bp; | |
84 | dump->regs.ax = regs->ax; | |
1da177e4 LT |
85 | dump->regs.ds = current->thread.ds; |
86 | dump->regs.es = current->thread.es; | |
b6edbb1e JF |
87 | savesegment(fs, fs); |
88 | dump->regs.fs = fs; | |
89 | savesegment(gs, gs); | |
90 | dump->regs.gs = gs; | |
65ea5b03 PA |
91 | dump->regs.orig_ax = regs->orig_ax; |
92 | dump->regs.ip = regs->ip; | |
1da177e4 | 93 | dump->regs.cs = regs->cs; |
65ea5b03 PA |
94 | dump->regs.flags = regs->flags; |
95 | dump->regs.sp = regs->sp; | |
1da177e4 LT |
96 | dump->regs.ss = regs->ss; |
97 | ||
98 | #if 1 /* FIXME */ | |
99 | dump->u_fpvalid = 0; | |
100 | #else | |
8edf8bee | 101 | dump->u_fpvalid = dump_fpu(regs, &dump->i387); |
1da177e4 LT |
102 | #endif |
103 | } | |
104 | ||
105 | #endif | |
106 | ||
107 | static struct linux_binfmt aout_format = { | |
108 | .module = THIS_MODULE, | |
109 | .load_binary = load_aout_binary, | |
110 | .load_shlib = load_aout_library, | |
44456d37 | 111 | #ifdef CORE_DUMP |
1da177e4 LT |
112 | .core_dump = aout_core_dump, |
113 | #endif | |
114 | .min_coredump = PAGE_SIZE | |
115 | }; | |
116 | ||
117 | static void set_brk(unsigned long start, unsigned long end) | |
118 | { | |
119 | start = PAGE_ALIGN(start); | |
120 | end = PAGE_ALIGN(end); | |
121 | if (end <= start) | |
122 | return; | |
123 | down_write(¤t->mm->mmap_sem); | |
124 | do_brk(start, end - start); | |
125 | up_write(¤t->mm->mmap_sem); | |
126 | } | |
127 | ||
44456d37 | 128 | #ifdef CORE_DUMP |
1da177e4 LT |
129 | /* |
130 | * These are the only things you should do on a core-file: use only these | |
131 | * macros to write out all the necessary info. | |
132 | */ | |
133 | ||
134 | static int dump_write(struct file *file, const void *addr, int nr) | |
135 | { | |
136 | return file->f_op->write(file, addr, nr, &file->f_pos) == nr; | |
137 | } | |
138 | ||
8edf8bee | 139 | #define DUMP_WRITE(addr, nr) \ |
1da177e4 LT |
140 | if (!dump_write(file, (void *)(addr), (nr))) \ |
141 | goto end_coredump; | |
142 | ||
8edf8bee TG |
143 | #define DUMP_SEEK(offset) \ |
144 | if (file->f_op->llseek) { \ | |
145 | if (file->f_op->llseek(file, (offset), 0) != (offset)) \ | |
146 | goto end_coredump; \ | |
147 | } else \ | |
148 | file->f_pos = (offset) | |
149 | ||
150 | #define START_DATA() (u.u_tsize << PAGE_SHIFT) | |
151 | #define START_STACK(u) (u.start_stack) | |
1da177e4 LT |
152 | |
153 | /* | |
154 | * Routine writes a core dump image in the current directory. | |
155 | * Currently only a stub-function. | |
156 | * | |
157 | * Note that setuid/setgid files won't make a core-dump if the uid/gid | |
158 | * changed due to the set[u|g]id. It's enforced by the "current->mm->dumpable" | |
159 | * field, which also makes sure the core-dumps won't be recursive if the | |
160 | * dumping of the process results in another error.. | |
161 | */ | |
162 | ||
8edf8bee TG |
163 | static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file, |
164 | unsigned long limit) | |
1da177e4 LT |
165 | { |
166 | mm_segment_t fs; | |
167 | int has_dumped = 0; | |
168 | unsigned long dump_start, dump_size; | |
169 | struct user32 dump; | |
1da177e4 LT |
170 | |
171 | fs = get_fs(); | |
172 | set_fs(KERNEL_DS); | |
173 | has_dumped = 1; | |
174 | current->flags |= PF_DUMPCORE; | |
8edf8bee | 175 | strncpy(dump.u_comm, current->comm, sizeof(current->comm)); |
6e16d89b | 176 | dump.u_ar0 = offsetof(struct user32, regs); |
1da177e4 LT |
177 | dump.signal = signr; |
178 | dump_thread32(regs, &dump); | |
179 | ||
8edf8bee TG |
180 | /* |
181 | * If the size of the dump file exceeds the rlimit, then see | |
182 | * what would happen if we wrote the stack, but not the data | |
183 | * area. | |
184 | */ | |
7dc0b22e | 185 | if ((dump.u_dsize + dump.u_ssize + 1) * PAGE_SIZE > limit) |
1da177e4 LT |
186 | dump.u_dsize = 0; |
187 | ||
8edf8bee | 188 | /* Make sure we have enough room to write the stack and data areas. */ |
7dc0b22e | 189 | if ((dump.u_ssize + 1) * PAGE_SIZE > limit) |
1da177e4 LT |
190 | dump.u_ssize = 0; |
191 | ||
8edf8bee | 192 | /* make sure we actually have a data and stack area to dump */ |
1da177e4 | 193 | set_fs(USER_DS); |
8edf8bee TG |
194 | if (!access_ok(VERIFY_READ, (void *) (unsigned long)START_DATA(dump), |
195 | dump.u_dsize << PAGE_SHIFT)) | |
1da177e4 | 196 | dump.u_dsize = 0; |
8edf8bee TG |
197 | if (!access_ok(VERIFY_READ, (void *) (unsigned long)START_STACK(dump), |
198 | dump.u_ssize << PAGE_SHIFT)) | |
1da177e4 LT |
199 | dump.u_ssize = 0; |
200 | ||
201 | set_fs(KERNEL_DS); | |
8edf8bee TG |
202 | /* struct user */ |
203 | DUMP_WRITE(&dump, sizeof(dump)); | |
204 | /* Now dump all of the user data. Include malloced stuff as well */ | |
1da177e4 | 205 | DUMP_SEEK(PAGE_SIZE); |
8edf8bee | 206 | /* now we start writing out the user space info */ |
1da177e4 | 207 | set_fs(USER_DS); |
8edf8bee | 208 | /* Dump the data area */ |
1da177e4 LT |
209 | if (dump.u_dsize != 0) { |
210 | dump_start = START_DATA(dump); | |
211 | dump_size = dump.u_dsize << PAGE_SHIFT; | |
8edf8bee | 212 | DUMP_WRITE(dump_start, dump_size); |
1da177e4 | 213 | } |
8edf8bee | 214 | /* Now prepare to dump the stack area */ |
1da177e4 LT |
215 | if (dump.u_ssize != 0) { |
216 | dump_start = START_STACK(dump); | |
217 | dump_size = dump.u_ssize << PAGE_SHIFT; | |
8edf8bee | 218 | DUMP_WRITE(dump_start, dump_size); |
1da177e4 | 219 | } |
8edf8bee TG |
220 | /* |
221 | * Finally dump the task struct. Not be used by gdb, but | |
222 | * could be useful | |
223 | */ | |
1da177e4 | 224 | set_fs(KERNEL_DS); |
8edf8bee | 225 | DUMP_WRITE(current, sizeof(*current)); |
1da177e4 LT |
226 | end_coredump: |
227 | set_fs(fs); | |
228 | return has_dumped; | |
229 | } | |
230 | #endif | |
231 | ||
232 | /* | |
233 | * create_aout_tables() parses the env- and arg-strings in new user | |
234 | * memory and creates the pointer tables from them, and puts their | |
235 | * addresses on the "stack", returning the new stack pointer value. | |
236 | */ | |
237 | static u32 __user *create_aout_tables(char __user *p, struct linux_binprm *bprm) | |
238 | { | |
8edf8bee TG |
239 | u32 __user *argv, *envp, *sp; |
240 | int argc = bprm->argc, envc = bprm->envc; | |
1da177e4 LT |
241 | |
242 | sp = (u32 __user *) ((-(unsigned long)sizeof(u32)) & (unsigned long) p); | |
243 | sp -= envc+1; | |
244 | envp = sp; | |
245 | sp -= argc+1; | |
246 | argv = sp; | |
8edf8bee TG |
247 | put_user((unsigned long) envp, --sp); |
248 | put_user((unsigned long) argv, --sp); | |
249 | put_user(argc, --sp); | |
1da177e4 | 250 | current->mm->arg_start = (unsigned long) p; |
8edf8bee | 251 | while (argc-- > 0) { |
1da177e4 | 252 | char c; |
8edf8bee TG |
253 | |
254 | put_user((u32)(unsigned long)p, argv++); | |
1da177e4 | 255 | do { |
8edf8bee | 256 | get_user(c, p++); |
1da177e4 LT |
257 | } while (c); |
258 | } | |
74019699 | 259 | put_user(0, argv); |
1da177e4 | 260 | current->mm->arg_end = current->mm->env_start = (unsigned long) p; |
8edf8bee | 261 | while (envc-- > 0) { |
1da177e4 | 262 | char c; |
8edf8bee TG |
263 | |
264 | put_user((u32)(unsigned long)p, envp++); | |
1da177e4 | 265 | do { |
8edf8bee | 266 | get_user(c, p++); |
1da177e4 LT |
267 | } while (c); |
268 | } | |
74019699 | 269 | put_user(0, envp); |
1da177e4 LT |
270 | current->mm->env_end = (unsigned long) p; |
271 | return sp; | |
272 | } | |
273 | ||
274 | /* | |
275 | * These are the functions used to load a.out style executables and shared | |
276 | * libraries. There is no binary dependent code anywhere else. | |
277 | */ | |
8edf8bee | 278 | static int load_aout_binary(struct linux_binprm *bprm, struct pt_regs *regs) |
1da177e4 | 279 | { |
8edf8bee | 280 | unsigned long error, fd_offset, rlim; |
1da177e4 | 281 | struct exec ex; |
1da177e4 LT |
282 | int retval; |
283 | ||
284 | ex = *((struct exec *) bprm->buf); /* exec-header */ | |
285 | if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != OMAGIC && | |
286 | N_MAGIC(ex) != QMAGIC && N_MAGIC(ex) != NMAGIC) || | |
287 | N_TRSIZE(ex) || N_DRSIZE(ex) || | |
8edf8bee TG |
288 | i_size_read(bprm->file->f_path.dentry->d_inode) < |
289 | ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) { | |
1da177e4 LT |
290 | return -ENOEXEC; |
291 | } | |
292 | ||
293 | fd_offset = N_TXTOFF(ex); | |
294 | ||
295 | /* Check initial limits. This avoids letting people circumvent | |
296 | * size limits imposed on them by creating programs with large | |
297 | * arrays in the data or bss. | |
298 | */ | |
2854e72b | 299 | rlim = rlimit(RLIMIT_DATA); |
1da177e4 LT |
300 | if (rlim >= RLIM_INFINITY) |
301 | rlim = ~0; | |
302 | if (ex.a_data + ex.a_bss > rlim) | |
303 | return -ENOMEM; | |
304 | ||
305 | /* Flush all traces of the currently running executable */ | |
306 | retval = flush_old_exec(bprm); | |
307 | if (retval) | |
308 | return retval; | |
309 | ||
1da177e4 LT |
310 | /* OK, This is the point of no return */ |
311 | set_personality(PER_LINUX); | |
8edf8bee | 312 | set_thread_flag(TIF_IA32); |
1da177e4 | 313 | |
221af7f8 LT |
314 | setup_new_exec(bprm); |
315 | ||
316 | regs->cs = __USER32_CS; | |
317 | regs->r8 = regs->r9 = regs->r10 = regs->r11 = regs->r12 = | |
318 | regs->r13 = regs->r14 = regs->r15 = 0; | |
319 | ||
1da177e4 LT |
320 | current->mm->end_code = ex.a_text + |
321 | (current->mm->start_code = N_TXTADDR(ex)); | |
322 | current->mm->end_data = ex.a_data + | |
323 | (current->mm->start_data = N_DATADDR(ex)); | |
324 | current->mm->brk = ex.a_bss + | |
325 | (current->mm->start_brk = N_BSSADDR(ex)); | |
326 | current->mm->free_area_cache = TASK_UNMAPPED_BASE; | |
1363c3cd | 327 | current->mm->cached_hole_size = 0; |
1da177e4 | 328 | |
a6f76f23 | 329 | install_exec_creds(bprm); |
8edf8bee | 330 | current->flags &= ~PF_FORKNOEXEC; |
1da177e4 LT |
331 | |
332 | if (N_MAGIC(ex) == OMAGIC) { | |
333 | unsigned long text_addr, map_size; | |
334 | loff_t pos; | |
335 | ||
336 | text_addr = N_TXTADDR(ex); | |
337 | ||
338 | pos = 32; | |
339 | map_size = ex.a_text+ex.a_data; | |
340 | ||
341 | down_write(¤t->mm->mmap_sem); | |
342 | error = do_brk(text_addr & PAGE_MASK, map_size); | |
343 | up_write(¤t->mm->mmap_sem); | |
344 | ||
345 | if (error != (text_addr & PAGE_MASK)) { | |
346 | send_sig(SIGKILL, current, 0); | |
347 | return error; | |
348 | } | |
349 | ||
52d522f5 AK |
350 | error = bprm->file->f_op->read(bprm->file, |
351 | (char __user *)text_addr, | |
1da177e4 LT |
352 | ex.a_text+ex.a_data, &pos); |
353 | if ((signed long)error < 0) { | |
354 | send_sig(SIGKILL, current, 0); | |
355 | return error; | |
356 | } | |
8edf8bee | 357 | |
1da177e4 LT |
358 | flush_icache_range(text_addr, text_addr+ex.a_text+ex.a_data); |
359 | } else { | |
360 | #ifdef WARN_OLD | |
361 | static unsigned long error_time, error_time2; | |
362 | if ((ex.a_text & 0xfff || ex.a_data & 0xfff) && | |
e5fc3161 JL |
363 | (N_MAGIC(ex) != NMAGIC) && |
364 | time_after(jiffies, error_time2 + 5*HZ)) { | |
1da177e4 LT |
365 | printk(KERN_NOTICE "executable not page aligned\n"); |
366 | error_time2 = jiffies; | |
367 | } | |
368 | ||
369 | if ((fd_offset & ~PAGE_MASK) != 0 && | |
e5fc3161 | 370 | time_after(jiffies, error_time + 5*HZ)) { |
8edf8bee TG |
371 | printk(KERN_WARNING |
372 | "fd_offset is not page aligned. Please convert " | |
373 | "program: %s\n", | |
c941192a | 374 | bprm->file->f_path.dentry->d_name.name); |
1da177e4 LT |
375 | error_time = jiffies; |
376 | } | |
377 | #endif | |
378 | ||
8edf8bee | 379 | if (!bprm->file->f_op->mmap || (fd_offset & ~PAGE_MASK) != 0) { |
1da177e4 | 380 | loff_t pos = fd_offset; |
8edf8bee | 381 | |
1da177e4 LT |
382 | down_write(¤t->mm->mmap_sem); |
383 | do_brk(N_TXTADDR(ex), ex.a_text+ex.a_data); | |
384 | up_write(¤t->mm->mmap_sem); | |
52d522f5 AK |
385 | bprm->file->f_op->read(bprm->file, |
386 | (char __user *)N_TXTADDR(ex), | |
1da177e4 LT |
387 | ex.a_text+ex.a_data, &pos); |
388 | flush_icache_range((unsigned long) N_TXTADDR(ex), | |
389 | (unsigned long) N_TXTADDR(ex) + | |
390 | ex.a_text+ex.a_data); | |
391 | goto beyond_if; | |
392 | } | |
393 | ||
394 | down_write(¤t->mm->mmap_sem); | |
395 | error = do_mmap(bprm->file, N_TXTADDR(ex), ex.a_text, | |
8edf8bee TG |
396 | PROT_READ | PROT_EXEC, |
397 | MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | | |
398 | MAP_EXECUTABLE | MAP_32BIT, | |
399 | fd_offset); | |
1da177e4 LT |
400 | up_write(¤t->mm->mmap_sem); |
401 | ||
402 | if (error != N_TXTADDR(ex)) { | |
403 | send_sig(SIGKILL, current, 0); | |
404 | return error; | |
405 | } | |
406 | ||
407 | down_write(¤t->mm->mmap_sem); | |
8edf8bee | 408 | error = do_mmap(bprm->file, N_DATADDR(ex), ex.a_data, |
1da177e4 | 409 | PROT_READ | PROT_WRITE | PROT_EXEC, |
8edf8bee TG |
410 | MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | |
411 | MAP_EXECUTABLE | MAP_32BIT, | |
1da177e4 LT |
412 | fd_offset + ex.a_text); |
413 | up_write(¤t->mm->mmap_sem); | |
414 | if (error != N_DATADDR(ex)) { | |
415 | send_sig(SIGKILL, current, 0); | |
416 | return error; | |
417 | } | |
418 | } | |
419 | beyond_if: | |
420 | set_binfmt(&aout_format); | |
421 | ||
422 | set_brk(current->mm->start_brk, current->mm->brk); | |
423 | ||
b6a2fea3 | 424 | retval = setup_arg_pages(bprm, IA32_STACK_TOP, EXSTACK_DEFAULT); |
8edf8bee TG |
425 | if (retval < 0) { |
426 | /* Someone check-me: is this error path enough? */ | |
427 | send_sig(SIGKILL, current, 0); | |
1da177e4 LT |
428 | return retval; |
429 | } | |
430 | ||
431 | current->mm->start_stack = | |
432 | (unsigned long)create_aout_tables((char __user *)bprm->p, bprm); | |
433 | /* start thread */ | |
b6edbb1e JF |
434 | loadsegment(fs, 0); |
435 | loadsegment(ds, __USER32_DS); | |
436 | loadsegment(es, __USER32_DS); | |
8edf8bee | 437 | load_gs_index(0); |
65ea5b03 PA |
438 | (regs)->ip = ex.a_entry; |
439 | (regs)->sp = current->mm->start_stack; | |
440 | (regs)->flags = 0x200; | |
1da177e4 LT |
441 | (regs)->cs = __USER32_CS; |
442 | (regs)->ss = __USER32_DS; | |
f891dd18 AK |
443 | regs->r8 = regs->r9 = regs->r10 = regs->r11 = |
444 | regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0; | |
1da177e4 | 445 | set_fs(USER_DS); |
1da177e4 LT |
446 | return 0; |
447 | } | |
448 | ||
449 | static int load_aout_library(struct file *file) | |
450 | { | |
8edf8bee TG |
451 | struct inode *inode; |
452 | unsigned long bss, start_addr, len, error; | |
1da177e4 LT |
453 | int retval; |
454 | struct exec ex; | |
455 | ||
c941192a | 456 | inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
457 | |
458 | retval = -ENOEXEC; | |
459 | error = kernel_read(file, 0, (char *) &ex, sizeof(ex)); | |
460 | if (error != sizeof(ex)) | |
461 | goto out; | |
462 | ||
463 | /* We come in here for the regular a.out style of shared libraries */ | |
464 | if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != QMAGIC) || N_TRSIZE(ex) || | |
465 | N_DRSIZE(ex) || ((ex.a_entry & 0xfff) && N_MAGIC(ex) == ZMAGIC) || | |
8edf8bee TG |
466 | i_size_read(inode) < |
467 | ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) { | |
1da177e4 LT |
468 | goto out; |
469 | } | |
470 | ||
471 | if (N_FLAGS(ex)) | |
472 | goto out; | |
473 | ||
474 | /* For QMAGIC, the starting address is 0x20 into the page. We mask | |
475 | this off to get the starting address for the page */ | |
476 | ||
477 | start_addr = ex.a_entry & 0xfffff000; | |
478 | ||
479 | if ((N_TXTOFF(ex) & ~PAGE_MASK) != 0) { | |
480 | loff_t pos = N_TXTOFF(ex); | |
481 | ||
482 | #ifdef WARN_OLD | |
483 | static unsigned long error_time; | |
e5fc3161 | 484 | if (time_after(jiffies, error_time + 5*HZ)) { |
8edf8bee TG |
485 | printk(KERN_WARNING |
486 | "N_TXTOFF is not page aligned. Please convert " | |
487 | "library: %s\n", | |
c941192a | 488 | file->f_path.dentry->d_name.name); |
1da177e4 LT |
489 | error_time = jiffies; |
490 | } | |
491 | #endif | |
492 | down_write(¤t->mm->mmap_sem); | |
493 | do_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss); | |
494 | up_write(¤t->mm->mmap_sem); | |
8edf8bee | 495 | |
52d522f5 | 496 | file->f_op->read(file, (char __user *)start_addr, |
1da177e4 LT |
497 | ex.a_text + ex.a_data, &pos); |
498 | flush_icache_range((unsigned long) start_addr, | |
8edf8bee TG |
499 | (unsigned long) start_addr + ex.a_text + |
500 | ex.a_data); | |
1da177e4 LT |
501 | |
502 | retval = 0; | |
503 | goto out; | |
504 | } | |
505 | /* Now use mmap to map the library into memory. */ | |
506 | down_write(¤t->mm->mmap_sem); | |
507 | error = do_mmap(file, start_addr, ex.a_text + ex.a_data, | |
508 | PROT_READ | PROT_WRITE | PROT_EXEC, | |
509 | MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_32BIT, | |
510 | N_TXTOFF(ex)); | |
511 | up_write(¤t->mm->mmap_sem); | |
512 | retval = error; | |
513 | if (error != start_addr) | |
514 | goto out; | |
515 | ||
516 | len = PAGE_ALIGN(ex.a_text + ex.a_data); | |
517 | bss = ex.a_text + ex.a_data + ex.a_bss; | |
518 | if (bss > len) { | |
519 | down_write(¤t->mm->mmap_sem); | |
520 | error = do_brk(start_addr + len, bss - len); | |
521 | up_write(¤t->mm->mmap_sem); | |
522 | retval = error; | |
523 | if (error != start_addr + len) | |
524 | goto out; | |
525 | } | |
526 | retval = 0; | |
527 | out: | |
528 | return retval; | |
529 | } | |
530 | ||
531 | static int __init init_aout_binfmt(void) | |
532 | { | |
533 | return register_binfmt(&aout_format); | |
534 | } | |
535 | ||
536 | static void __exit exit_aout_binfmt(void) | |
537 | { | |
538 | unregister_binfmt(&aout_format); | |
539 | } | |
540 | ||
541 | module_init(init_aout_binfmt); | |
542 | module_exit(exit_aout_binfmt); | |
543 | MODULE_LICENSE("GPL"); |