1 /* Operating system support for run-time dynamic linker. Hurd version.
2 Copyright (C) 1995, 1996, 1997 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 not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, 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>
39 #include "dl-machine.h"
41 extern void __mach_init (void);
44 extern char **_dl_argv
;
45 extern char **_environ
;
47 int __libc_enable_secure
;
49 struct hurd_startup_data
*_dl_hurd_data
;
51 unsigned int __hurd_threadvar_max
= _HURD_THREADVAR_MAX
;
52 static unsigned long int threadvars
[_HURD_THREADVAR_MAX
];
53 unsigned long int __hurd_threadvar_stack_offset
54 = (unsigned long int) &threadvars
;
55 unsigned long int __hurd_sigthread_stack_base
;
56 unsigned long int __hurd_sigthread_stack_end
;
57 unsigned long int *__hurd_sigthread_variables
;
58 unsigned long int __hurd_threadvar_stack_mask
;
61 /* XXX loser kludge for vm_map kernel bug */
62 static vm_address_t fmha
;
63 static vm_size_t fmhs
;
64 static void unfmh(void){
65 __vm_deallocate(__mach_task_self(),fmha
,fmhs
);}
66 static void fmh(void) {
67 error_t err
;int x
;mach_port_t p
;
68 vm_address_t a
=0x08000000U
,max
=VM_MAX_ADDRESS
;
69 while (!(err
=__vm_region(__mach_task_self(),&a
,&fmhs
,&x
,&x
,&x
,&x
,&p
,&x
))){
70 __mach_port_deallocate(__mach_task_self(),p
);
71 if (a
+fmhs
>=0x80000000U
){
74 if (err
) assert(err
==KERN_NO_SPACE
);
75 if (!fmha
)fmhs
=0;else{
77 err
= __vm_map (__mach_task_self (),
78 &fmha
, fmhs
, 0, 0, MACH_PORT_NULL
, 0, 1,
79 VM_PROT_NONE
, VM_PROT_NONE
, VM_INHERIT_COPY
);
82 /* XXX loser kludge for vm_map kernel bug */
87 _dl_sysdep_start (void **start_argptr
,
88 void (*dl_main
) (const Elf32_Phdr
*phdr
, Elf32_Word phent
,
89 Elf32_Addr
*user_entry
))
91 extern void _start ();
93 void go (int *argdata
)
95 extern unsigned int _dl_skip_args
; /* rtld.c */
98 /* Cache the information in various global variables. */
100 _dl_argv
= 1 + (char **) argdata
;
101 _environ
= &_dl_argv
[_dl_argc
+ 1];
102 for (p
= _environ
; *p
++;); /* Skip environ pointers and terminator. */
104 if ((void *) p
== _dl_argv
[0])
106 static struct hurd_startup_data nodata
;
107 _dl_hurd_data
= &nodata
;
108 nodata
.user_entry
= (vm_address_t
) &_start
;
111 _dl_hurd_data
= (void *) p
;
113 __libc_enable_secure
= _dl_hurd_data
->flags
& EXEC_SECURE
;
115 if (_dl_hurd_data
->flags
& EXEC_STACK_ARGS
&&
116 _dl_hurd_data
->user_entry
== 0)
117 _dl_hurd_data
->user_entry
= (vm_address_t
) &_start
;
121 if (_dl_hurd_data
->user_entry
== (vm_address_t
) &_start
)
122 /* We were invoked as a command, not as the program interpreter.
123 The generic ld.so code supports this: it will parse the args
124 as "ld.so PROGRAM [ARGS...]". For booting the Hurd, we
125 support an additional special syntax:
126 ld.so [-LIBS...] PROGRAM [ARGS...]
127 Each LIBS word consists of "FILENAME=MEMOBJ";
128 for example "-/lib/libc.so=123" says that the contents of
129 /lib/libc.so are found in a memory object whose port name
130 in our task is 123. */
131 while (_dl_argc
> 2 && _dl_argv
[1][0] == '-' && _dl_argv
[1][1] != '-')
133 char *lastslash
, *memobjname
, *p
;
140 p
= _dl_argv
++[1] + 1;
142 memobjname
= strchr (p
, '=');
144 _dl_sysdep_fatal ("Bogus library spec: ", p
, "\n", NULL
);
145 *memobjname
++ = '\0';
147 while (*memobjname
!= '\0')
148 memobj
= (memobj
* 10) + (*memobjname
++ - '0');
150 /* Add a user reference on the memory object port, so we will
151 still have one after _dl_map_object_from_fd calls our
153 err
= __mach_port_mod_refs (__mach_task_self (), memobj
,
154 MACH_PORT_RIGHT_SEND
, +1);
157 lastslash
= strrchr (p
, '/');
158 l
= _dl_map_object_from_fd (lastslash
? lastslash
+ 1 : p
,
161 /* Squirrel away the memory object port where it
162 can be retrieved by the program later. */
163 l
->l_info
[DT_NULL
] = (void *) memobj
;
166 /* Call elf/rtld.c's main program. It will set everything
167 up and leave us to transfer control to USER_ENTRY. */
168 (*dl_main
) ((const Elf32_Phdr
*) _dl_hurd_data
->phdr
,
169 _dl_hurd_data
->phdrsz
/ sizeof (Elf32_Phdr
),
170 &_dl_hurd_data
->user_entry
);
172 if (_dl_skip_args
&& _dl_argv
[-_dl_skip_args
] == (char *) p
)
174 /* We are ignoring the first few arguments, but we have no Hurd
175 startup data. It is magical convention that ARGV[0] == P in
176 this case. The startup code in init-first.c will get confused
177 if this is not the case, so we must rearrange things to make
178 it so. Overwrite the original ARGV[0] at P with
179 ARGV[_dl_skip_args]. */
180 assert ((char *) p
< _dl_argv
[0]);
181 _dl_argv
[0] = strcpy ((char *) p
, _dl_argv
[0]);
185 extern void _dl_start_user (void);
186 /* Unwind the stack to ARGDATA and simulate a return from _dl_start
187 to the RTLD_START code which will run the user's entry point. */
188 RETURN_TO (argdata
, &_dl_start_user
, _dl_hurd_data
->user_entry
);
192 /* Set up so we can do RPCs. */
197 /* See hurd/hurdstartup.c; this deals with getting information
198 from the exec server and slicing up the arguments.
199 Then it will call `go', above. */
200 _hurd_startup (start_argptr
, &go
);
207 _dl_sysdep_start_cleanup (void)
209 /* Deallocate the reply port and task port rights acquired by
210 __mach_init. We are done with them now, and the user will
211 reacquire them for himself when he wants them. */
212 __mig_dealloc_reply_port (MACH_PORT_NULL
);
213 __mach_port_deallocate (__mach_task_self (), __mach_task_self_
);
217 _dl_sysdep_fatal (const char *msg
, ...)
224 size_t len
= strlen (msg
);
225 mach_msg_type_number_t nwrote
;
228 if (__io_write (_hurd_init_dtable
[2], msg
, len
, -1, &nwrote
))
232 } while (nwrote
> 0);
233 msg
= va_arg (ap
, const char *);
242 _dl_sysdep_error (const char *msg
, ...)
249 size_t len
= strlen (msg
);
250 mach_msg_type_number_t nwrote
;
253 if (__io_write (_hurd_init_dtable
[2], msg
, len
, -1, &nwrote
))
257 } while (nwrote
> 0);
258 msg
= va_arg (ap
, const char *);
265 _dl_sysdep_message (const char *msg
, ...)
272 size_t len
= strlen (msg
);
273 mach_msg_type_number_t nwrote
;
276 if (__io_write (_hurd_init_dtable
[1], msg
, len
, -1, &nwrote
))
280 } while (nwrote
> 0);
281 msg
= va_arg (ap
, const char *);
286 /* Minimal open/close/mmap implementation sufficient for initial loading of
287 shared libraries. These are weak definitions so that when the
288 dynamic linker re-relocates itself to be user-visible (for -ldl),
289 it will get the user's definition (i.e. usually libc's). */
291 /* Open FILE_NAME and return a read-mmappable port in MEMOBJ_RD for it, or
292 return an error. If STAT is non-zero, stat the file into that stat buffer. */
294 open_file (const char *file_name
, int mode
,
295 mach_port_t
*memobj_rd
, struct stat
*stat
)
297 enum retry_type doretry
;
298 char retryname
[1024]; /* XXX string_t LOSES! */
299 file_t startdir
, newpt
, fileport
;
304 assert (mode
== O_RDONLY
);
306 startdir
= _dl_hurd_data
->portarray
[file_name
[0] == '/' ?
307 INIT_PORT_CRDIR
: INIT_PORT_CWDIR
];
309 while (file_name
[0] == '/')
312 if (err
= __dir_lookup (startdir
, (char *)file_name
, mode
, 0,
313 &doretry
, retryname
, &fileport
))
322 __mach_port_deallocate (__mach_task_self (), startdir
);
328 case FS_RETRY_REAUTH
:
330 mach_port_t ref
= __mach_reply_port ();
331 err
= __io_reauthenticate (fileport
, ref
, MACH_MSG_TYPE_MAKE_SEND
);
333 err
= __auth_user_authenticate
334 (_dl_hurd_data
->portarray
[INIT_PORT_AUTH
],
335 ref
, MACH_MSG_TYPE_MAKE_SEND
,
337 __mach_port_destroy (__mach_task_self (), ref
);
339 __mach_port_deallocate (__mach_task_self (), fileport
);
345 case FS_RETRY_NORMAL
:
347 if (nloops
++ >= SYMLOOP_MAX
)
351 /* An empty RETRYNAME indicates we have the final port. */
352 if (retryname
[0] == '\0')
354 mach_port_t memobj_wr
;
359 /* We have the file open. Now map it. */
362 err
= __io_stat (fileport
, stat
);
364 err
= __io_map (fileport
, memobj_rd
, &memobj_wr
);
367 __mach_port_deallocate (__mach_task_self (), fileport
);
371 if (memobj_wr
!= MACH_PORT_NULL
)
372 __mach_port_deallocate (__mach_task_self (), memobj_wr
);
379 file_name
= retryname
;
382 case FS_RETRY_MAGICAL
:
383 switch (retryname
[0])
386 startdir
= _dl_hurd_data
->portarray
[INIT_PORT_CRDIR
];
388 if (fileport
!= MACH_PORT_NULL
)
389 __mach_port_deallocate (__mach_task_self (), fileport
);
390 file_name
= &retryname
[1];
394 if (retryname
[1] == 'd' && retryname
[2] == '/' &&
395 isdigit (retryname
[3]))
397 /* We can't use strtol for the decoding here
398 because it brings in hairy locale bloat. */
401 for (p
= &retryname
[3]; isdigit (*p
); ++p
)
402 fd
= (fd
* 10) + (*p
- '0');
403 /* Check for excess text after the number. A slash is
404 valid; it ends the component. Anything else does not
405 name a numeric file descriptor. */
406 if (*p
!= '/' && *p
!= '\0')
408 if (fd
< 0 || fd
>= _dl_hurd_data
->dtablesize
||
409 _dl_hurd_data
->dtable
[fd
] == MACH_PORT_NULL
)
410 /* If the name was a proper number, but the file
411 descriptor does not exist, we return EBADF instead
414 fileport
= _dl_hurd_data
->dtable
[fd
];
417 /* This descriptor is the file port we want. */
423 /* Do a normal retry on the remaining components. */
426 file_name
= p
+ 1; /* Skip the slash. */
435 if (retryname
[1] == 'a' && retryname
[2] == 'c' &&
436 retryname
[3] == 'h' && retryname
[4] == 't' &&
437 retryname
[5] == 'y' && retryname
[6] == 'p' &&
441 struct host_basic_info hostinfo
;
442 mach_msg_type_number_t hostinfocnt
= HOST_BASIC_INFO_COUNT
;
444 if (err
= __host_info (__mach_host_self (), HOST_BASIC_INFO
,
445 (natural_t
*) &hostinfo
,
448 if (hostinfocnt
!= HOST_BASIC_INFO_COUNT
)
450 p
= _itoa (hostinfo
.cpu_subtype
, &retryname
[8], 10, 0);
452 p
= _itoa (hostinfo
.cpu_type
, &retryname
[8], 10, 0);
454 abort (); /* XXX write this right if this ever happens */
456 strcpy (retryname
, p
);
465 if (retryname
[1] == 't' && retryname
[2] == 'y')
466 switch (retryname
[3])
468 error_t
opentty (file_t
*result
)
472 err
= __termctty_open_terminal
473 (_dl_hurd_data
->portarray
[INIT_PORT_CTTYID
],
477 mach_port_t ref
= __mach_reply_port ();
478 err
= __io_reauthenticate
479 (unauth
, ref
, MACH_MSG_TYPE_MAKE_SEND
);
481 err
= __auth_user_authenticate
482 (_dl_hurd_data
->portarray
[INIT_PORT_AUTH
],
483 ref
, MACH_MSG_TYPE_MAKE_SEND
,
485 __mach_port_deallocate (__mach_task_self (),
487 __mach_port_destroy (__mach_task_self (), ref
);
493 if (err
= opentty (&fileport
))
498 if (err
= opentty (&startdir
))
501 strcpy (retryname
, &retryname
[4]);
520 err
= __dir_lookup (startdir
, (char *)file_name
, mode
, 0,
521 &doretry
, retryname
, &fileport
);
526 __open (const char *file_name
, int mode
, ...)
528 mach_port_t memobj_rd
;
529 error_t err
= open_file (file_name
, mode
, &memobj_rd
, 0);
531 return __hurd_fail (err
);
533 return (int)memobj_rd
;
539 if (fd
!= (int) MACH_PORT_NULL
)
540 __mach_port_deallocate (__mach_task_self (), (mach_port_t
) fd
);
544 caddr_t weak_function
545 __mmap (caddr_t addr
, size_t len
, int prot
, int flags
, int fd
, off_t offset
)
549 vm_address_t mapaddr
;
551 vmprot
= VM_PROT_NONE
;
552 if (prot
& PROT_READ
)
553 vmprot
|= VM_PROT_READ
;
554 if (prot
& PROT_WRITE
)
555 vmprot
|= VM_PROT_WRITE
;
556 if (prot
& PROT_EXEC
)
557 vmprot
|= VM_PROT_EXECUTE
;
559 mapaddr
= (vm_address_t
) addr
;
560 err
= __vm_map (__mach_task_self (),
561 &mapaddr
, (vm_size_t
) len
, 0 /*ELF_MACHINE_USER_ADDRESS_MASK*/,
562 !(flags
& MAP_FIXED
),
563 (flags
& MAP_ANON
) ? MACH_PORT_NULL
: (mach_port_t
) fd
,
564 (vm_offset_t
) offset
,
565 flags
& (MAP_COPY
|MAP_PRIVATE
),
567 (flags
& MAP_SHARED
) ? VM_INHERIT_SHARE
: VM_INHERIT_COPY
);
568 if (err
== KERN_NO_SPACE
&& (flags
& MAP_FIXED
))
570 /* XXX this is not atomic as it is in unix! */
571 /* The region is already allocated; deallocate it first. */
572 err
= __vm_deallocate (__mach_task_self (), mapaddr
, len
);
574 err
= __vm_map (__mach_task_self (),
575 &mapaddr
, (vm_size_t
) len
, 0 /*ELF_MACHINE_USER_ADDRESS_MASK*/,
576 !(flags
& MAP_FIXED
),
577 (mach_port_t
) fd
, (vm_offset_t
) offset
,
578 flags
& (MAP_COPY
|MAP_PRIVATE
),
581 ? VM_INHERIT_SHARE
: VM_INHERIT_COPY
);
584 return err
? (caddr_t
) __hurd_fail (err
) : (caddr_t
) mapaddr
;
590 __proc_mark_exit (_dl_hurd_data
->portarray
[INIT_PORT_PROC
],
591 W_EXITCODE (status
, 0), 0);
592 while (__task_terminate (__mach_task_self ()))
593 __mach_task_self_
= (__mach_task_self
) ();
596 /* Read the whole contents of FILE into new mmap'd space with given
597 protections. The size of the file is returned in SIZE. */
599 _dl_sysdep_read_whole_file (const char *file
, size_t *size
, int prot
)
602 mach_port_t memobj_rd
;
604 error_t err
= open_file (file
, O_RDONLY
, &memobj_rd
, &stat
);
608 /* Map a copy of the file contents. */
609 contents
= __mmap (0, stat
.st_size
, prot
, MAP_COPY
, memobj_rd
, 0);
610 if (contents
== (void *)-1)
613 *size
= stat
.st_size
;
615 __mach_port_deallocate (__mach_task_self (), memobj_rd
);
626 /* This function is called by interruptible RPC stubs. For initial
627 dynamic linking, just use the normal mach_msg. Since this defn is
628 weak, the real defn in libc.so will override it if we are linked into
629 the user program (-ldl). */
631 error_t weak_function
632 _hurd_intr_rpc_mach_msg (mach_msg_header_t
*msg
,
633 mach_msg_option_t option
,
634 mach_msg_size_t send_size
,
635 mach_msg_size_t rcv_size
,
636 mach_port_t rcv_name
,
637 mach_msg_timeout_t timeout
,
640 return __mach_msg (msg
, option
, send_size
, rcv_size
, rcv_name
,