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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 | 28 | |
1da177e4 LT |
29 | #include <asm/uaccess.h> |
30 | #include <asm/pgalloc.h> | |
31 | #include <asm/cacheflush.h> | |
32 | #include <asm/user32.h> | |
33 | #include <asm/ia32.h> | |
34 | ||
35 | #undef WARN_OLD | |
0eead9ab | 36 | #undef CORE_DUMP /* definitely broken */ |
1da177e4 | 37 | |
8edf8bee TG |
38 | static int load_aout_binary(struct linux_binprm *, struct pt_regs *regs); |
39 | static int load_aout_library(struct file *); | |
1da177e4 | 40 | |
44456d37 | 41 | #ifdef CORE_DUMP |
8edf8bee TG |
42 | static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file, |
43 | unsigned long limit); | |
1da177e4 LT |
44 | |
45 | /* | |
46 | * fill in the user structure for a core dump.. | |
47 | */ | |
8edf8bee | 48 | static void dump_thread32(struct pt_regs *regs, struct user32 *dump) |
1da177e4 | 49 | { |
8edf8bee | 50 | u32 fs, gs; |
1da177e4 LT |
51 | |
52 | /* changed the size calculations - should hopefully work better. lbt */ | |
53 | dump->magic = CMAGIC; | |
54 | dump->start_code = 0; | |
65ea5b03 | 55 | dump->start_stack = regs->sp & ~(PAGE_SIZE - 1); |
1da177e4 | 56 | dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT; |
8edf8bee TG |
57 | dump->u_dsize = ((unsigned long) |
58 | (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT; | |
1da177e4 LT |
59 | dump->u_dsize -= dump->u_tsize; |
60 | dump->u_ssize = 0; | |
8edf8bee TG |
61 | dump->u_debugreg[0] = current->thread.debugreg0; |
62 | dump->u_debugreg[1] = current->thread.debugreg1; | |
63 | dump->u_debugreg[2] = current->thread.debugreg2; | |
64 | dump->u_debugreg[3] = current->thread.debugreg3; | |
65 | dump->u_debugreg[4] = 0; | |
66 | dump->u_debugreg[5] = 0; | |
67 | dump->u_debugreg[6] = current->thread.debugreg6; | |
68 | dump->u_debugreg[7] = current->thread.debugreg7; | |
69 | ||
70 | if (dump->start_stack < 0xc0000000) { | |
71 | unsigned long tmp; | |
72 | ||
73 | tmp = (unsigned long) (0xc0000000 - dump->start_stack); | |
74 | dump->u_ssize = tmp >> PAGE_SHIFT; | |
75 | } | |
1da177e4 | 76 | |
65ea5b03 PA |
77 | dump->regs.bx = regs->bx; |
78 | dump->regs.cx = regs->cx; | |
79 | dump->regs.dx = regs->dx; | |
80 | dump->regs.si = regs->si; | |
81 | dump->regs.di = regs->di; | |
82 | dump->regs.bp = regs->bp; | |
83 | dump->regs.ax = regs->ax; | |
1da177e4 LT |
84 | dump->regs.ds = current->thread.ds; |
85 | dump->regs.es = current->thread.es; | |
b6edbb1e JF |
86 | savesegment(fs, fs); |
87 | dump->regs.fs = fs; | |
88 | savesegment(gs, gs); | |
89 | dump->regs.gs = gs; | |
65ea5b03 PA |
90 | dump->regs.orig_ax = regs->orig_ax; |
91 | dump->regs.ip = regs->ip; | |
1da177e4 | 92 | dump->regs.cs = regs->cs; |
65ea5b03 PA |
93 | dump->regs.flags = regs->flags; |
94 | dump->regs.sp = regs->sp; | |
1da177e4 LT |
95 | dump->regs.ss = regs->ss; |
96 | ||
97 | #if 1 /* FIXME */ | |
98 | dump->u_fpvalid = 0; | |
99 | #else | |
8edf8bee | 100 | dump->u_fpvalid = dump_fpu(regs, &dump->i387); |
1da177e4 LT |
101 | #endif |
102 | } | |
103 | ||
104 | #endif | |
105 | ||
106 | static struct linux_binfmt aout_format = { | |
107 | .module = THIS_MODULE, | |
108 | .load_binary = load_aout_binary, | |
109 | .load_shlib = load_aout_library, | |
44456d37 | 110 | #ifdef CORE_DUMP |
1da177e4 LT |
111 | .core_dump = aout_core_dump, |
112 | #endif | |
113 | .min_coredump = PAGE_SIZE | |
114 | }; | |
115 | ||
116 | static void set_brk(unsigned long start, unsigned long end) | |
117 | { | |
118 | start = PAGE_ALIGN(start); | |
119 | end = PAGE_ALIGN(end); | |
120 | if (end <= start) | |
121 | return; | |
122 | down_write(¤t->mm->mmap_sem); | |
123 | do_brk(start, end - start); | |
124 | up_write(¤t->mm->mmap_sem); | |
125 | } | |
126 | ||
44456d37 | 127 | #ifdef CORE_DUMP |
1da177e4 LT |
128 | /* |
129 | * These are the only things you should do on a core-file: use only these | |
130 | * macros to write out all the necessary info. | |
131 | */ | |
132 | ||
0eead9ab | 133 | #include <linux/coredump.h> |
1da177e4 | 134 | |
8edf8bee | 135 | #define DUMP_WRITE(addr, nr) \ |
1da177e4 LT |
136 | if (!dump_write(file, (void *)(addr), (nr))) \ |
137 | goto end_coredump; | |
138 | ||
0eead9ab LT |
139 | #define DUMP_SEEK(offset) \ |
140 | if (!dump_seek(file, offset)) \ | |
141 | goto end_coredump; | |
8edf8bee TG |
142 | |
143 | #define START_DATA() (u.u_tsize << PAGE_SHIFT) | |
144 | #define START_STACK(u) (u.start_stack) | |
1da177e4 LT |
145 | |
146 | /* | |
147 | * Routine writes a core dump image in the current directory. | |
148 | * Currently only a stub-function. | |
149 | * | |
150 | * Note that setuid/setgid files won't make a core-dump if the uid/gid | |
151 | * changed due to the set[u|g]id. It's enforced by the "current->mm->dumpable" | |
152 | * field, which also makes sure the core-dumps won't be recursive if the | |
153 | * dumping of the process results in another error.. | |
154 | */ | |
155 | ||
8edf8bee TG |
156 | static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file, |
157 | unsigned long limit) | |
1da177e4 LT |
158 | { |
159 | mm_segment_t fs; | |
160 | int has_dumped = 0; | |
161 | unsigned long dump_start, dump_size; | |
162 | struct user32 dump; | |
1da177e4 LT |
163 | |
164 | fs = get_fs(); | |
165 | set_fs(KERNEL_DS); | |
166 | has_dumped = 1; | |
167 | current->flags |= PF_DUMPCORE; | |
8edf8bee | 168 | strncpy(dump.u_comm, current->comm, sizeof(current->comm)); |
6e16d89b | 169 | dump.u_ar0 = offsetof(struct user32, regs); |
1da177e4 LT |
170 | dump.signal = signr; |
171 | dump_thread32(regs, &dump); | |
172 | ||
8edf8bee TG |
173 | /* |
174 | * If the size of the dump file exceeds the rlimit, then see | |
175 | * what would happen if we wrote the stack, but not the data | |
176 | * area. | |
177 | */ | |
7dc0b22e | 178 | if ((dump.u_dsize + dump.u_ssize + 1) * PAGE_SIZE > limit) |
1da177e4 LT |
179 | dump.u_dsize = 0; |
180 | ||
8edf8bee | 181 | /* Make sure we have enough room to write the stack and data areas. */ |
7dc0b22e | 182 | if ((dump.u_ssize + 1) * PAGE_SIZE > limit) |
1da177e4 LT |
183 | dump.u_ssize = 0; |
184 | ||
8edf8bee | 185 | /* make sure we actually have a data and stack area to dump */ |
1da177e4 | 186 | set_fs(USER_DS); |
8edf8bee TG |
187 | if (!access_ok(VERIFY_READ, (void *) (unsigned long)START_DATA(dump), |
188 | dump.u_dsize << PAGE_SHIFT)) | |
1da177e4 | 189 | dump.u_dsize = 0; |
8edf8bee TG |
190 | if (!access_ok(VERIFY_READ, (void *) (unsigned long)START_STACK(dump), |
191 | dump.u_ssize << PAGE_SHIFT)) | |
1da177e4 LT |
192 | dump.u_ssize = 0; |
193 | ||
194 | set_fs(KERNEL_DS); | |
8edf8bee TG |
195 | /* struct user */ |
196 | DUMP_WRITE(&dump, sizeof(dump)); | |
197 | /* Now dump all of the user data. Include malloced stuff as well */ | |
1da177e4 | 198 | DUMP_SEEK(PAGE_SIZE); |
8edf8bee | 199 | /* now we start writing out the user space info */ |
1da177e4 | 200 | set_fs(USER_DS); |
8edf8bee | 201 | /* Dump the data area */ |
1da177e4 LT |
202 | if (dump.u_dsize != 0) { |
203 | dump_start = START_DATA(dump); | |
204 | dump_size = dump.u_dsize << PAGE_SHIFT; | |
8edf8bee | 205 | DUMP_WRITE(dump_start, dump_size); |
1da177e4 | 206 | } |
8edf8bee | 207 | /* Now prepare to dump the stack area */ |
1da177e4 LT |
208 | if (dump.u_ssize != 0) { |
209 | dump_start = START_STACK(dump); | |
210 | dump_size = dump.u_ssize << PAGE_SHIFT; | |
8edf8bee | 211 | DUMP_WRITE(dump_start, dump_size); |
1da177e4 | 212 | } |
1da177e4 LT |
213 | end_coredump: |
214 | set_fs(fs); | |
215 | return has_dumped; | |
216 | } | |
217 | #endif | |
218 | ||
219 | /* | |
220 | * create_aout_tables() parses the env- and arg-strings in new user | |
221 | * memory and creates the pointer tables from them, and puts their | |
222 | * addresses on the "stack", returning the new stack pointer value. | |
223 | */ | |
224 | static u32 __user *create_aout_tables(char __user *p, struct linux_binprm *bprm) | |
225 | { | |
8edf8bee TG |
226 | u32 __user *argv, *envp, *sp; |
227 | int argc = bprm->argc, envc = bprm->envc; | |
1da177e4 LT |
228 | |
229 | sp = (u32 __user *) ((-(unsigned long)sizeof(u32)) & (unsigned long) p); | |
230 | sp -= envc+1; | |
231 | envp = sp; | |
232 | sp -= argc+1; | |
233 | argv = sp; | |
8edf8bee TG |
234 | put_user((unsigned long) envp, --sp); |
235 | put_user((unsigned long) argv, --sp); | |
236 | put_user(argc, --sp); | |
1da177e4 | 237 | current->mm->arg_start = (unsigned long) p; |
8edf8bee | 238 | while (argc-- > 0) { |
1da177e4 | 239 | char c; |
8edf8bee TG |
240 | |
241 | put_user((u32)(unsigned long)p, argv++); | |
1da177e4 | 242 | do { |
8edf8bee | 243 | get_user(c, p++); |
1da177e4 LT |
244 | } while (c); |
245 | } | |
74019699 | 246 | put_user(0, argv); |
1da177e4 | 247 | current->mm->arg_end = current->mm->env_start = (unsigned long) p; |
8edf8bee | 248 | while (envc-- > 0) { |
1da177e4 | 249 | char c; |
8edf8bee TG |
250 | |
251 | put_user((u32)(unsigned long)p, envp++); | |
1da177e4 | 252 | do { |
8edf8bee | 253 | get_user(c, p++); |
1da177e4 LT |
254 | } while (c); |
255 | } | |
74019699 | 256 | put_user(0, envp); |
1da177e4 LT |
257 | current->mm->env_end = (unsigned long) p; |
258 | return sp; | |
259 | } | |
260 | ||
261 | /* | |
262 | * These are the functions used to load a.out style executables and shared | |
263 | * libraries. There is no binary dependent code anywhere else. | |
264 | */ | |
8edf8bee | 265 | static int load_aout_binary(struct linux_binprm *bprm, struct pt_regs *regs) |
1da177e4 | 266 | { |
8edf8bee | 267 | unsigned long error, fd_offset, rlim; |
1da177e4 | 268 | struct exec ex; |
1da177e4 LT |
269 | int retval; |
270 | ||
271 | ex = *((struct exec *) bprm->buf); /* exec-header */ | |
272 | if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != OMAGIC && | |
273 | N_MAGIC(ex) != QMAGIC && N_MAGIC(ex) != NMAGIC) || | |
274 | N_TRSIZE(ex) || N_DRSIZE(ex) || | |
8edf8bee TG |
275 | i_size_read(bprm->file->f_path.dentry->d_inode) < |
276 | ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) { | |
1da177e4 LT |
277 | return -ENOEXEC; |
278 | } | |
279 | ||
280 | fd_offset = N_TXTOFF(ex); | |
281 | ||
282 | /* Check initial limits. This avoids letting people circumvent | |
283 | * size limits imposed on them by creating programs with large | |
284 | * arrays in the data or bss. | |
285 | */ | |
2854e72b | 286 | rlim = rlimit(RLIMIT_DATA); |
1da177e4 LT |
287 | if (rlim >= RLIM_INFINITY) |
288 | rlim = ~0; | |
289 | if (ex.a_data + ex.a_bss > rlim) | |
290 | return -ENOMEM; | |
291 | ||
292 | /* Flush all traces of the currently running executable */ | |
293 | retval = flush_old_exec(bprm); | |
294 | if (retval) | |
295 | return retval; | |
296 | ||
1da177e4 LT |
297 | /* OK, This is the point of no return */ |
298 | set_personality(PER_LINUX); | |
8edf8bee | 299 | set_thread_flag(TIF_IA32); |
375906f8 | 300 | current->mm->context.ia32_compat = 1; |
1da177e4 | 301 | |
221af7f8 LT |
302 | setup_new_exec(bprm); |
303 | ||
304 | regs->cs = __USER32_CS; | |
305 | regs->r8 = regs->r9 = regs->r10 = regs->r11 = regs->r12 = | |
306 | regs->r13 = regs->r14 = regs->r15 = 0; | |
307 | ||
1da177e4 LT |
308 | current->mm->end_code = ex.a_text + |
309 | (current->mm->start_code = N_TXTADDR(ex)); | |
310 | current->mm->end_data = ex.a_data + | |
311 | (current->mm->start_data = N_DATADDR(ex)); | |
312 | current->mm->brk = ex.a_bss + | |
313 | (current->mm->start_brk = N_BSSADDR(ex)); | |
314 | current->mm->free_area_cache = TASK_UNMAPPED_BASE; | |
1363c3cd | 315 | current->mm->cached_hole_size = 0; |
1da177e4 | 316 | |
6414fa6a AV |
317 | retval = setup_arg_pages(bprm, IA32_STACK_TOP, EXSTACK_DEFAULT); |
318 | if (retval < 0) { | |
319 | /* Someone check-me: is this error path enough? */ | |
320 | send_sig(SIGKILL, current, 0); | |
321 | return retval; | |
322 | } | |
323 | ||
a6f76f23 | 324 | install_exec_creds(bprm); |
1da177e4 LT |
325 | |
326 | if (N_MAGIC(ex) == OMAGIC) { | |
327 | unsigned long text_addr, map_size; | |
328 | loff_t pos; | |
329 | ||
330 | text_addr = N_TXTADDR(ex); | |
331 | ||
332 | pos = 32; | |
333 | map_size = ex.a_text+ex.a_data; | |
334 | ||
335 | down_write(¤t->mm->mmap_sem); | |
336 | error = do_brk(text_addr & PAGE_MASK, map_size); | |
337 | up_write(¤t->mm->mmap_sem); | |
338 | ||
339 | if (error != (text_addr & PAGE_MASK)) { | |
340 | send_sig(SIGKILL, current, 0); | |
341 | return error; | |
342 | } | |
343 | ||
52d522f5 AK |
344 | error = bprm->file->f_op->read(bprm->file, |
345 | (char __user *)text_addr, | |
1da177e4 LT |
346 | ex.a_text+ex.a_data, &pos); |
347 | if ((signed long)error < 0) { | |
348 | send_sig(SIGKILL, current, 0); | |
349 | return error; | |
350 | } | |
8edf8bee | 351 | |
1da177e4 LT |
352 | flush_icache_range(text_addr, text_addr+ex.a_text+ex.a_data); |
353 | } else { | |
354 | #ifdef WARN_OLD | |
355 | static unsigned long error_time, error_time2; | |
356 | if ((ex.a_text & 0xfff || ex.a_data & 0xfff) && | |
e5fc3161 JL |
357 | (N_MAGIC(ex) != NMAGIC) && |
358 | time_after(jiffies, error_time2 + 5*HZ)) { | |
1da177e4 LT |
359 | printk(KERN_NOTICE "executable not page aligned\n"); |
360 | error_time2 = jiffies; | |
361 | } | |
362 | ||
363 | if ((fd_offset & ~PAGE_MASK) != 0 && | |
e5fc3161 | 364 | time_after(jiffies, error_time + 5*HZ)) { |
8edf8bee TG |
365 | printk(KERN_WARNING |
366 | "fd_offset is not page aligned. Please convert " | |
367 | "program: %s\n", | |
c941192a | 368 | bprm->file->f_path.dentry->d_name.name); |
1da177e4 LT |
369 | error_time = jiffies; |
370 | } | |
371 | #endif | |
372 | ||
8edf8bee | 373 | if (!bprm->file->f_op->mmap || (fd_offset & ~PAGE_MASK) != 0) { |
1da177e4 | 374 | loff_t pos = fd_offset; |
8edf8bee | 375 | |
1da177e4 LT |
376 | down_write(¤t->mm->mmap_sem); |
377 | do_brk(N_TXTADDR(ex), ex.a_text+ex.a_data); | |
378 | up_write(¤t->mm->mmap_sem); | |
52d522f5 AK |
379 | bprm->file->f_op->read(bprm->file, |
380 | (char __user *)N_TXTADDR(ex), | |
1da177e4 LT |
381 | ex.a_text+ex.a_data, &pos); |
382 | flush_icache_range((unsigned long) N_TXTADDR(ex), | |
383 | (unsigned long) N_TXTADDR(ex) + | |
384 | ex.a_text+ex.a_data); | |
385 | goto beyond_if; | |
386 | } | |
387 | ||
388 | down_write(¤t->mm->mmap_sem); | |
389 | error = do_mmap(bprm->file, N_TXTADDR(ex), ex.a_text, | |
8edf8bee TG |
390 | PROT_READ | PROT_EXEC, |
391 | MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | | |
392 | MAP_EXECUTABLE | MAP_32BIT, | |
393 | fd_offset); | |
1da177e4 LT |
394 | up_write(¤t->mm->mmap_sem); |
395 | ||
396 | if (error != N_TXTADDR(ex)) { | |
397 | send_sig(SIGKILL, current, 0); | |
398 | return error; | |
399 | } | |
400 | ||
401 | down_write(¤t->mm->mmap_sem); | |
8edf8bee | 402 | error = do_mmap(bprm->file, N_DATADDR(ex), ex.a_data, |
1da177e4 | 403 | PROT_READ | PROT_WRITE | PROT_EXEC, |
8edf8bee TG |
404 | MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | |
405 | MAP_EXECUTABLE | MAP_32BIT, | |
1da177e4 LT |
406 | fd_offset + ex.a_text); |
407 | up_write(¤t->mm->mmap_sem); | |
408 | if (error != N_DATADDR(ex)) { | |
409 | send_sig(SIGKILL, current, 0); | |
410 | return error; | |
411 | } | |
412 | } | |
413 | beyond_if: | |
414 | set_binfmt(&aout_format); | |
415 | ||
416 | set_brk(current->mm->start_brk, current->mm->brk); | |
417 | ||
1da177e4 LT |
418 | current->mm->start_stack = |
419 | (unsigned long)create_aout_tables((char __user *)bprm->p, bprm); | |
420 | /* start thread */ | |
b6edbb1e JF |
421 | loadsegment(fs, 0); |
422 | loadsegment(ds, __USER32_DS); | |
423 | loadsegment(es, __USER32_DS); | |
8edf8bee | 424 | load_gs_index(0); |
65ea5b03 PA |
425 | (regs)->ip = ex.a_entry; |
426 | (regs)->sp = current->mm->start_stack; | |
427 | (regs)->flags = 0x200; | |
1da177e4 LT |
428 | (regs)->cs = __USER32_CS; |
429 | (regs)->ss = __USER32_DS; | |
f891dd18 AK |
430 | regs->r8 = regs->r9 = regs->r10 = regs->r11 = |
431 | regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0; | |
1da177e4 | 432 | set_fs(USER_DS); |
1da177e4 LT |
433 | return 0; |
434 | } | |
435 | ||
436 | static int load_aout_library(struct file *file) | |
437 | { | |
8edf8bee TG |
438 | struct inode *inode; |
439 | unsigned long bss, start_addr, len, error; | |
1da177e4 LT |
440 | int retval; |
441 | struct exec ex; | |
442 | ||
c941192a | 443 | inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
444 | |
445 | retval = -ENOEXEC; | |
446 | error = kernel_read(file, 0, (char *) &ex, sizeof(ex)); | |
447 | if (error != sizeof(ex)) | |
448 | goto out; | |
449 | ||
450 | /* We come in here for the regular a.out style of shared libraries */ | |
451 | if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != QMAGIC) || N_TRSIZE(ex) || | |
452 | N_DRSIZE(ex) || ((ex.a_entry & 0xfff) && N_MAGIC(ex) == ZMAGIC) || | |
8edf8bee TG |
453 | i_size_read(inode) < |
454 | ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) { | |
1da177e4 LT |
455 | goto out; |
456 | } | |
457 | ||
458 | if (N_FLAGS(ex)) | |
459 | goto out; | |
460 | ||
461 | /* For QMAGIC, the starting address is 0x20 into the page. We mask | |
462 | this off to get the starting address for the page */ | |
463 | ||
464 | start_addr = ex.a_entry & 0xfffff000; | |
465 | ||
466 | if ((N_TXTOFF(ex) & ~PAGE_MASK) != 0) { | |
467 | loff_t pos = N_TXTOFF(ex); | |
468 | ||
469 | #ifdef WARN_OLD | |
470 | static unsigned long error_time; | |
e5fc3161 | 471 | if (time_after(jiffies, error_time + 5*HZ)) { |
8edf8bee TG |
472 | printk(KERN_WARNING |
473 | "N_TXTOFF is not page aligned. Please convert " | |
474 | "library: %s\n", | |
c941192a | 475 | file->f_path.dentry->d_name.name); |
1da177e4 LT |
476 | error_time = jiffies; |
477 | } | |
478 | #endif | |
479 | down_write(¤t->mm->mmap_sem); | |
480 | do_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss); | |
481 | up_write(¤t->mm->mmap_sem); | |
8edf8bee | 482 | |
52d522f5 | 483 | file->f_op->read(file, (char __user *)start_addr, |
1da177e4 LT |
484 | ex.a_text + ex.a_data, &pos); |
485 | flush_icache_range((unsigned long) start_addr, | |
8edf8bee TG |
486 | (unsigned long) start_addr + ex.a_text + |
487 | ex.a_data); | |
1da177e4 LT |
488 | |
489 | retval = 0; | |
490 | goto out; | |
491 | } | |
492 | /* Now use mmap to map the library into memory. */ | |
493 | down_write(¤t->mm->mmap_sem); | |
494 | error = do_mmap(file, start_addr, ex.a_text + ex.a_data, | |
495 | PROT_READ | PROT_WRITE | PROT_EXEC, | |
496 | MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_32BIT, | |
497 | N_TXTOFF(ex)); | |
498 | up_write(¤t->mm->mmap_sem); | |
499 | retval = error; | |
500 | if (error != start_addr) | |
501 | goto out; | |
502 | ||
503 | len = PAGE_ALIGN(ex.a_text + ex.a_data); | |
504 | bss = ex.a_text + ex.a_data + ex.a_bss; | |
505 | if (bss > len) { | |
506 | down_write(¤t->mm->mmap_sem); | |
507 | error = do_brk(start_addr + len, bss - len); | |
508 | up_write(¤t->mm->mmap_sem); | |
509 | retval = error; | |
510 | if (error != start_addr + len) | |
511 | goto out; | |
512 | } | |
513 | retval = 0; | |
514 | out: | |
515 | return retval; | |
516 | } | |
517 | ||
518 | static int __init init_aout_binfmt(void) | |
519 | { | |
8fc3dc5a AV |
520 | register_binfmt(&aout_format); |
521 | return 0; | |
1da177e4 LT |
522 | } |
523 | ||
524 | static void __exit exit_aout_binfmt(void) | |
525 | { | |
526 | unregister_binfmt(&aout_format); | |
527 | } | |
528 | ||
529 | module_init(init_aout_binfmt); | |
530 | module_exit(exit_aout_binfmt); | |
531 | MODULE_LICENSE("GPL"); |