1 /* Operating system support for run-time dynamic linker. Hurd version.
2 Copyright (C) 1995, 1996 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If
17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
18 Cambridge, MA 02139, USA. */
29 #include <mach/mig_support.h>
30 #include "hurdstartup.h"
31 #include <mach/host_info.h>
32 #include "../stdio-common/_itoa.h"
33 #include <hurd/auth.h>
34 #include <hurd/term.h>
38 #include "dl-machine.h"
40 extern void __mach_init (void);
43 extern char **_dl_argv;
44 extern char **_environ;
46 struct hurd_startup_data *_dl_hurd_data;
48 unsigned int __hurd_threadvar_max = _HURD_THREADVAR_MAX;
49 static unsigned long int threadvars[_HURD_THREADVAR_MAX];
50 unsigned long int __hurd_threadvar_stack_offset
51 = (unsigned long int) &threadvars;
52 unsigned long int __hurd_sigthread_stack_base;
53 unsigned long int __hurd_sigthread_stack_end;
54 unsigned long int *__hurd_sigthread_variables;
55 unsigned long int __hurd_threadvar_stack_mask;
58 /* XXX loser kludge for vm_map kernel bug */
59 static vm_address_t fmha;
60 static vm_size_t fmhs;
61 static void unfmh(void){
62 __vm_deallocate(__mach_task_self(),fmha,fmhs);}
63 static void fmh(void) {
64 error_t err;int x;mach_port_t p;
65 vm_address_t a=0x08000000U,max=VM_MAX_ADDRESS;
66 while (!(err=__vm_region(__mach_task_self(),&a,&fmhs,&x,&x,&x,&x,&p,&x))){
67 __mach_port_deallocate(__mach_task_self(),p);
68 if (a+fmhs>=0x80000000U){
71 if (err) assert(err==KERN_NO_SPACE);
72 if (!fmha)fmhs=0;else{
74 err = __vm_map (__mach_task_self (),
75 &fmha, fmhs, 0, 0, MACH_PORT_NULL, 0, 1,
76 VM_PROT_NONE, VM_PROT_NONE, VM_INHERIT_COPY);
79 /* XXX loser kludge for vm_map kernel bug */
84 _dl_sysdep_start (void **start_argptr,
85 void (*dl_main) (const Elf32_Phdr *phdr, Elf32_Word phent,
86 Elf32_Addr *user_entry))
88 extern void _start ();
90 void go (int *argdata)
92 extern unsigned int _dl_skip_args; /* rtld.c */
95 /* Cache the information in various global variables. */
97 _dl_argv = 1 + (char **) argdata;
98 _environ = &_dl_argv[_dl_argc + 1];
99 for (p = _environ; *p++;); /* Skip environ pointers and terminator. */
101 if ((void *) p == _dl_argv[0])
103 static struct hurd_startup_data nodata;
104 _dl_hurd_data = &nodata;
105 nodata.user_entry = (vm_address_t) &_start;
108 _dl_hurd_data = (void *) p;
110 __libc_enable_secure = _dl_hurd_data->flags & EXEC_SECURE;
112 if (_dl_hurd_data->flags & EXEC_STACK_ARGS &&
113 _dl_hurd_data->user_entry == 0)
114 _dl_hurd_data->user_entry = (vm_address_t) &_start;
118 if (_dl_hurd_data->user_entry == (vm_address_t) &_start)
119 /* We were invoked as a command, not as the program interpreter.
120 The generic ld.so code supports this: it will parse the args
121 as "ld.so PROGRAM [ARGS...]". For booting the Hurd, we
122 support an additional special syntax:
123 ld.so [-LIBS...] PROGRAM [ARGS...]
124 Each LIBS word consists of "FILENAME=MEMOBJ";
125 for example "-/lib/libc.so=123" says that the contents of
126 /lib/libc.so are found in a memory object whose port name
127 in our task is 123. */
128 while (_dl_argc > 2 && _dl_argv[1][0] == '-' && _dl_argv[1][1] != '-')
130 char *lastslash, *memobjname, *p;
137 p = _dl_argv++[1] + 1;
139 memobjname = strchr (p, '=');
141 _dl_sysdep_fatal ("Bogus library spec: ", p, "\n", NULL);
142 *memobjname++ = '\0';
144 while (*memobjname != '\0')
145 memobj = (memobj * 10) + (*memobjname++ - '0');
147 /* Add a user reference on the memory object port, so we will
148 still have one after _dl_map_object_from_fd calls our
150 err = __mach_port_mod_refs (__mach_task_self (), memobj,
151 MACH_PORT_RIGHT_SEND, +1);
154 lastslash = strrchr (p, '/');
155 l = _dl_map_object_from_fd (lastslash ? lastslash + 1 : p,
158 /* Squirrel away the memory object port where it
159 can be retrieved by the program later. */
160 l->l_info[DT_NULL] = (void *) memobj;
163 /* Call elf/rtld.c's main program. It will set everything
164 up and leave us to transfer control to USER_ENTRY. */
165 (*dl_main) ((const Elf32_Phdr *) _dl_hurd_data->phdr,
166 _dl_hurd_data->phdrsz / sizeof (Elf32_Phdr),
167 &_dl_hurd_data->user_entry);
169 if (_dl_skip_args && _dl_argv[-_dl_skip_args] == (char *) p)
171 /* We are ignoring the first few arguments, but we have no Hurd
172 startup data. It is magical convention that ARGV[0] == P in
173 this case. The startup code in init-first.c will get confused
174 if this is not the case, so we must rearrange things to make
175 it so. Overwrite the original ARGV[0] at P with
176 ARGV[_dl_skip_args]. */
177 assert ((char *) p < _dl_argv[0]);
178 _dl_argv[0] = strcpy ((char *) p, _dl_argv[0]);
182 extern void _dl_start_user (void);
183 /* Unwind the stack to ARGDATA and simulate a return from _dl_start
184 to the RTLD_START code which will run the user's entry point. */
185 RETURN_TO (argdata, &_dl_start_user, _dl_hurd_data->user_entry);
189 /* Set up so we can do RPCs. */
194 /* See hurd/hurdstartup.c; this deals with getting information
195 from the exec server and slicing up the arguments.
196 Then it will call `go', above. */
197 _hurd_startup (start_argptr, &go);
204 _dl_sysdep_start_cleanup (void)
206 /* Deallocate the reply port and task port rights acquired by
207 __mach_init. We are done with them now, and the user will
208 reacquire them for himself when he wants them. */
209 __mig_dealloc_reply_port (MACH_PORT_NULL);
210 __mach_port_deallocate (__mach_task_self (), __mach_task_self_);
214 _dl_sysdep_fatal (const char *msg, ...)
221 size_t len = strlen (msg);
222 mach_msg_type_number_t nwrote;
225 if (__io_write (_hurd_init_dtable[2], msg, len, -1, &nwrote))
229 } while (nwrote > 0);
230 msg = va_arg (ap, const char *);
239 _dl_sysdep_message (const char *msg, ...)
246 size_t len = strlen (msg);
247 mach_msg_type_number_t nwrote;
250 if (__io_write (_hurd_init_dtable[1], msg, len, -1, &nwrote))
254 } while (nwrote > 0);
255 msg = va_arg (ap, const char *);
260 /* Minimal open/close/mmap implementation sufficient for initial loading of
261 shared libraries. These are weak definitions so that when the
262 dynamic linker re-relocates itself to be user-visible (for -ldl),
263 it will get the user's definition (i.e. usually libc's). */
266 __open (const char *file_name, int mode, ...)
268 enum retry_type doretry;
269 char retryname[1024]; /* XXX string_t LOSES! */
270 file_t startdir, newpt, fileport;
275 assert (mode == O_RDONLY);
277 startdir = _dl_hurd_data->portarray[file_name[0] == '/' ?
278 INIT_PORT_CRDIR : INIT_PORT_CWDIR];
280 while (file_name[0] == '/')
283 if (err = __dir_lookup (startdir, file_name, mode, 0,
284 &doretry, retryname, &fileport))
285 return __hurd_fail (err);
293 __mach_port_deallocate (__mach_task_self (), startdir);
295 return __hurd_fail (err);
299 case FS_RETRY_REAUTH:
301 mach_port_t ref = __mach_reply_port ();
302 err = __io_reauthenticate (fileport, ref, MACH_MSG_TYPE_MAKE_SEND);
304 err = __auth_user_authenticate
305 (_dl_hurd_data->portarray[INIT_PORT_AUTH],
306 ref, MACH_MSG_TYPE_MAKE_SEND,
308 __mach_port_destroy (__mach_task_self (), ref);
310 __mach_port_deallocate (__mach_task_self (), fileport);
312 return __hurd_fail (err);
316 case FS_RETRY_NORMAL:
318 if (nloops++ >= SYMLOOP_MAX)
319 return __hurd_fail (ELOOP);
322 /* An empty RETRYNAME indicates we have the final port. */
323 if (retryname[0] == '\0')
325 mach_port_t memobj_rd, memobj_wr;
330 /* We have the file open. Now map it. */
331 err = __io_map (fileport, &memobj_rd, &memobj_wr);
333 __mach_port_deallocate (__mach_task_self (), fileport);
335 return __hurd_fail (err);
336 if (memobj_wr != MACH_PORT_NULL)
337 __mach_port_deallocate (__mach_task_self (), memobj_wr);
339 return (int) memobj_rd;
344 file_name = retryname;
347 case FS_RETRY_MAGICAL:
348 switch (retryname[0])
351 startdir = _dl_hurd_data->portarray[INIT_PORT_CRDIR];
353 if (fileport != MACH_PORT_NULL)
354 __mach_port_deallocate (__mach_task_self (), fileport);
355 file_name = &retryname[1];
359 if (retryname[1] == 'd' && retryname[2] == '/' &&
360 isdigit (retryname[3]))
362 /* We can't use strtol for the decoding here
363 because it brings in hairy locale bloat. */
366 for (p = &retryname[3]; isdigit (*p); ++p)
367 fd = (fd * 10) + (*p - '0');
368 /* Check for excess text after the number. A slash is
369 valid; it ends the component. Anything else does not
370 name a numeric file descriptor. */
371 if (*p != '/' && *p != '\0')
372 return __hurd_fail (ENOENT);
373 if (fd < 0 || fd >= _dl_hurd_data->dtablesize ||
374 _dl_hurd_data->dtable[fd] == MACH_PORT_NULL)
375 /* If the name was a proper number, but the file
376 descriptor does not exist, we return EBADF instead
378 return __hurd_fail (EBADF);
379 fileport = _dl_hurd_data->dtable[fd];
382 /* This descriptor is the file port we want. */
388 /* Do a normal retry on the remaining components. */
391 file_name = p + 1; /* Skip the slash. */
400 if (retryname[1] == 'a' && retryname[2] == 'c' &&
401 retryname[3] == 'h' && retryname[4] == 't' &&
402 retryname[5] == 'y' && retryname[6] == 'p' &&
406 struct host_basic_info hostinfo;
407 mach_msg_type_number_t hostinfocnt = HOST_BASIC_INFO_COUNT;
409 if (err = __host_info (__mach_host_self (), HOST_BASIC_INFO,
410 (natural_t *) &hostinfo,
413 if (hostinfocnt != HOST_BASIC_INFO_COUNT)
415 p = _itoa (hostinfo.cpu_subtype, &retryname[8], 10, 0);
417 p = _itoa (hostinfo.cpu_type, &retryname[8], 10, 0);
419 abort (); /* XXX write this right if this ever happens */
421 strcpy (retryname, p);
430 if (retryname[1] == 't' && retryname[2] == 'y')
431 switch (retryname[3])
433 error_t opentty (file_t *result)
437 err = __termctty_open_terminal
438 (_dl_hurd_data->portarray[INIT_PORT_CTTYID],
442 mach_port_t ref = __mach_reply_port ();
443 err = __io_reauthenticate
444 (unauth, ref, MACH_MSG_TYPE_MAKE_SEND);
446 err = __auth_user_authenticate
447 (_dl_hurd_data->portarray[INIT_PORT_AUTH],
448 ref, MACH_MSG_TYPE_MAKE_SEND,
450 __mach_port_deallocate (__mach_task_self (),
452 __mach_port_destroy (__mach_task_self (), ref);
458 if (err = opentty (&fileport))
459 return __hurd_fail (err);
463 if (err = opentty (&startdir))
464 return __hurd_fail (err);
466 strcpy (retryname, &retryname[4]);
477 return __hurd_fail (EGRATUITOUS);
482 return __hurd_fail (EGRATUITOUS);
485 err = __dir_lookup (startdir, file_name, mode, 0,
486 &doretry, retryname, &fileport);
493 if (fd != (int) MACH_PORT_NULL)
494 __mach_port_deallocate (__mach_task_self (), (mach_port_t) fd);
498 caddr_t weak_function
499 __mmap (caddr_t addr, size_t len, int prot, int flags, int fd, off_t offset)
503 vm_address_t mapaddr;
505 vmprot = VM_PROT_NONE;
506 if (prot & PROT_READ)
507 vmprot |= VM_PROT_READ;
508 if (prot & PROT_WRITE)
509 vmprot |= VM_PROT_WRITE;
510 if (prot & PROT_EXEC)
511 vmprot |= VM_PROT_EXECUTE;
513 mapaddr = (vm_address_t) addr;
514 err = __vm_map (__mach_task_self (),
515 &mapaddr, (vm_size_t) len, 0 /*ELF_MACHINE_USER_ADDRESS_MASK*/,
516 !(flags & MAP_FIXED),
517 (flags & MAP_ANON) ? MACH_PORT_NULL : (mach_port_t) fd,
518 (vm_offset_t) offset,
519 flags & (MAP_COPY|MAP_PRIVATE),
521 (flags & MAP_SHARED) ? VM_INHERIT_SHARE : VM_INHERIT_COPY);
522 if (err == KERN_NO_SPACE && (flags & MAP_FIXED))
524 /* XXX this is not atomic as it is in unix! */
525 /* The region is already allocated; deallocate it first. */
526 err = __vm_deallocate (__mach_task_self (), mapaddr, len);
528 err = __vm_map (__mach_task_self (),
529 &mapaddr, (vm_size_t) len, 0 /*ELF_MACHINE_USER_ADDRESS_MASK*/,
530 !(flags & MAP_FIXED),
531 (mach_port_t) fd, (vm_offset_t) offset,
532 flags & (MAP_COPY|MAP_PRIVATE),
535 ? VM_INHERIT_SHARE : VM_INHERIT_COPY);
538 return err ? (caddr_t) __hurd_fail (err) : (caddr_t) mapaddr;
544 __proc_mark_exit (_dl_hurd_data->portarray[INIT_PORT_PROC],
545 W_EXITCODE (status, 0), 0);
546 while (__task_terminate (__mach_task_self ()))
547 __mach_task_self_ = (__mach_task_self) ();
551 /* This function is called by interruptible RPC stubs. For initial
552 dynamic linking, just use the normal mach_msg. Since this defn is
553 weak, the real defn in libc.so will override it if we are linked into
554 the user program (-ldl). */
556 error_t weak_function
557 _hurd_intr_rpc_mach_msg (mach_msg_header_t *msg,
558 mach_msg_option_t option,
559 mach_msg_size_t send_size,
560 mach_msg_size_t rcv_size,
561 mach_port_t rcv_name,
562 mach_msg_timeout_t timeout,
565 return __mach_msg (msg, option, send_size, rcv_size, rcv_name,