1 /* Operating system support for run-time dynamic linker. Hurd version.
2 Copyright (C) 1995 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/_itoa.h"
33 #include <hurd/auth.h>
34 #include <hurd/term.h>
37 #include "dl-machine.h"
39 extern void __mach_init (void);
42 extern char **_dl_argv
;
43 extern char **_environ
;
45 struct hurd_startup_data
*_dl_hurd_data
;
47 unsigned int __hurd_threadvar_max
= _HURD_THREADVAR_MAX
;
48 static unsigned long int threadvars
[_HURD_THREADVAR_MAX
];
49 unsigned long int __hurd_threadvar_stack_offset
50 = (unsigned long int) &threadvars
;
53 /* XXX loser kludge for vm_map kernel bug */
54 static vm_address_t fmha
;
55 static vm_size_t fmhs
;
57 __vm_deallocate(__mach_task_self(),fmha
,fmhs
);}
59 error_t err
;int x
;mach_port_t p
;
60 vm_address_t a
=0x08000000U
,max
=VM_MAX_ADDRESS
;
61 while (!(err
=__vm_region(__mach_task_self(),&a
,&fmhs
,&x
,&x
,&x
,&x
,&p
,&x
))){
62 __mach_port_deallocate(__mach_task_self(),p
);
63 if (a
+fmhs
>=0x80000000U
){
66 if (err
) assert(err
==KERN_NO_SPACE
);
67 if (!fmha
)fmhs
=0;else{
69 err
= __vm_map (__mach_task_self (),
70 &fmha
, fmhs
, 0, 0, MACH_PORT_NULL
, 0, 1,
71 VM_PROT_NONE
, VM_PROT_NONE
, VM_INHERIT_COPY
);
74 /* XXX loser kludge for vm_map kernel bug */
79 _dl_sysdep_start (void **start_argptr
,
80 void (*dl_main
) (const Elf32_Phdr
*phdr
, Elf32_Word phent
,
81 Elf32_Addr
*user_entry
))
83 extern void _start ();
85 void go (int *argdata
)
87 extern unsigned int _dl_skip_args
; /* rtld.c */
90 /* Cache the information in various global variables. */
92 _dl_argv
= 1 + (char **) argdata
;
93 _environ
= &_dl_argv
[_dl_argc
+ 1];
94 for (p
= _environ
; *p
++;); /* Skip environ pointers and terminator. */
96 if ((void *) p
== _dl_argv
[0])
98 static struct hurd_startup_data nodata
;
99 _dl_hurd_data
= &nodata
;
100 nodata
.user_entry
= (vm_address_t
) &_start
;
103 _dl_hurd_data
= (void *) p
;
105 _dl_secure
= _dl_hurd_data
->flags
& EXEC_SECURE
;
109 if (_dl_hurd_data
->user_entry
== (vm_address_t
) &_start
)
110 /* We were invoked as a command, not as the program interpreter.
111 The generic ld.so code supports this: it will parse the args
112 as "ld.so PROGRAM [ARGS...]". For booting the Hurd, we
113 support an additional special syntax:
114 ld.so [-LIBS...] PROGRAM [ARGS...]
115 Each LIBS word consists of "FILENAME=MEMOBJ";
116 for example "-/lib/libc.so=123" says that the contents of
117 /lib/libc.so are found in a memory object whose port name
118 in our task is 123. */
119 while (_dl_argc
> 2 && _dl_argv
[1][0] == '-' && _dl_argv
[1][1] != '-')
121 char *lastslash
, *memobjname
, *p
;
128 p
= _dl_argv
++[1] + 1;
130 memobjname
= strchr (p
, '=');
132 _dl_sysdep_fatal ("Bogus library spec: ", p
, "\n", NULL
);
133 *memobjname
++ = '\0';
134 memobj
= (mach_port_t
) atoi (memobjname
);
136 /* Add a user reference on the memory object port, so we will
137 still have one after _dl_map_object_from_fd calls our
139 err
= __mach_port_mod_refs (__mach_task_self (), memobj
,
140 MACH_PORT_RIGHT_SEND
, +1);
143 lastslash
= strrchr (p
, '/');
144 l
= _dl_map_object_from_fd (lastslash
? lastslash
+ 1 : p
,
147 /* Squirrel away the memory object port where it
148 can be retrieved by the program later. */
149 l
->l_info
[DT_NULL
] = (void *) memobj
;
152 /* Call elf/rtld.c's main program. It will set everything
153 up and leave us to transfer control to USER_ENTRY. */
154 (*dl_main
) ((const Elf32_Phdr
*) _dl_hurd_data
->phdr
,
155 _dl_hurd_data
->phdrsz
/ sizeof (Elf32_Phdr
),
156 &_dl_hurd_data
->user_entry
);
158 /* Deallocate the reply port and task port rights acquired by
159 __mach_init. We are done with them now, and the user will
160 reacquire them for himself when he wants them. */
161 __mig_dealloc_reply_port (MACH_PORT_NULL
);
162 __mach_port_deallocate (__mach_task_self (), __mach_task_self_
);
164 if (_dl_skip_args
&& _dl_argv
[-_dl_skip_args
] == (char *) p
)
166 /* We are ignoring the first few arguments, but we have no Hurd
167 startup data. It is magical convention that ARGV[0] == P in
168 this case. The startup code in init-first.c will get confused
169 if this is not the case, so we must rearrange things to make
170 it so. Overwrite the original ARGV[0] at P with
171 ARGV[_dl_skip_args]. */
172 assert ((char *) p
< _dl_argv
[0]);
173 _dl_argv
[0] = strcpy ((char *) p
, _dl_argv
[0]);
177 extern void _dl_start_user (void);
178 /* Unwind the stack to ARGDATA and simulate a return from _dl_start
179 to the RTLD_START code which will run the user's entry point. */
180 RETURN_TO (argdata
, &_dl_start_user
, _dl_hurd_data
->user_entry
);
184 /* Set up so we can do RPCs. */
189 /* See hurd/hurdstartup.c; this deals with getting information
190 from the exec server and slicing up the arguments.
191 Then it will call `go', above. */
192 _hurd_startup (start_argptr
, &go
);
199 _dl_sysdep_open_zero_fill (void)
201 return (int) MACH_PORT_NULL
;
206 _dl_sysdep_fatal (const char *msg
, ...)
213 size_t len
= strlen (msg
);
214 mach_msg_type_number_t nwrote
;
217 if (__io_write (_hurd_init_dtable
[2], msg
, len
, -1, &nwrote
))
221 } while (nwrote
> 0);
222 msg
= va_arg (ap
, const char *);
231 _dl_sysdep_message (const char *msg
, ...)
238 size_t len
= strlen (msg
);
239 mach_msg_type_number_t nwrote
;
242 if (__io_write (_hurd_init_dtable
[1], msg
, len
, -1, &nwrote
))
246 } while (nwrote
> 0);
247 msg
= va_arg (ap
, const char *);
252 /* Minimal open/close/mmap implementation sufficient for initial loading of
253 shared libraries. These are weak definitions so that when the
254 dynamic linker re-relocates itself to be user-visible (for -ldl),
255 it will get the user's definition (i.e. usually libc's). */
258 open (const char *file_name
, int mode
, ...)
260 enum retry_type doretry
;
261 char retryname
[1024]; /* XXX string_t LOSES! */
262 file_t startdir
, newpt
, fileport
;
267 assert (mode
== O_RDONLY
);
269 startdir
= _dl_hurd_data
->portarray
[file_name
[0] == '/' ?
270 INIT_PORT_CRDIR
: INIT_PORT_CWDIR
];
272 while (file_name
[0] == '/')
275 if (err
= __dir_lookup (startdir
, file_name
, mode
, 0,
276 &doretry
, retryname
, &fileport
))
277 return __hurd_fail (err
);
285 __mach_port_deallocate (__mach_task_self (), startdir
);
287 return __hurd_fail (err
);
291 case FS_RETRY_REAUTH
:
293 mach_port_t ref
= __mach_reply_port ();
294 err
= __io_reauthenticate (fileport
, ref
, MACH_MSG_TYPE_MAKE_SEND
);
296 err
= __auth_user_authenticate
297 (_dl_hurd_data
->portarray
[INIT_PORT_AUTH
],
299 ref
, MACH_MSG_TYPE_MAKE_SEND
,
301 __mach_port_destroy (__mach_task_self (), ref
);
303 __mach_port_deallocate (__mach_task_self (), fileport
);
305 return __hurd_fail (err
);
309 case FS_RETRY_NORMAL
:
311 if (nloops
++ >= SYMLOOP_MAX
)
312 return __hurd_fail (ELOOP
);
315 /* An empty RETRYNAME indicates we have the final port. */
316 if (retryname
[0] == '\0')
318 mach_port_t memobj_rd
, memobj_wr
;
323 /* We have the file open. Now map it. */
324 err
= __io_map (fileport
, &memobj_rd
, &memobj_wr
);
326 __mach_port_deallocate (__mach_task_self (), fileport
);
328 return __hurd_fail (err
);
329 if (memobj_wr
!= MACH_PORT_NULL
)
330 __mach_port_deallocate (__mach_task_self (), memobj_wr
);
332 return (int) memobj_rd
;
337 file_name
= retryname
;
340 case FS_RETRY_MAGICAL
:
341 switch (retryname
[0])
344 startdir
= _dl_hurd_data
->portarray
[INIT_PORT_CRDIR
];
346 if (fileport
!= MACH_PORT_NULL
)
347 __mach_port_deallocate (__mach_task_self (), fileport
);
348 file_name
= &retryname
[1];
352 if (retryname
[1] == 'd' && retryname
[2] == '/')
357 fd
= (int) strtol (retryname
, &end
, 10);
358 if (end
== NULL
|| err
|| /* Malformed number. */
359 /* Check for excess text after the number. A slash
360 is valid; it ends the component. Anything else
361 does not name a numeric file descriptor. */
362 (*end
!= '/' && *end
!= '\0'))
363 return __hurd_fail (ENOENT
);
364 if (fd
< 0 || fd
>= _dl_hurd_data
->dtablesize
||
365 _dl_hurd_data
->dtable
[fd
] == MACH_PORT_NULL
)
366 /* If the name was a proper number, but the file
367 descriptor does not exist, we return EBADF instead
369 return __hurd_fail (EBADF
);
370 fileport
= _dl_hurd_data
->dtable
[fd
];
373 /* This descriptor is the file port we want. */
379 /* Do a normal retry on the remaining components. */
382 file_name
= end
+ 1; /* Skip the slash. */
391 if (retryname
[1] == 'a' && retryname
[2] == 'c' &&
392 retryname
[3] == 'h' && retryname
[4] == 't' &&
393 retryname
[5] == 'y' && retryname
[6] == 'p' &&
397 struct host_basic_info hostinfo
;
398 mach_msg_type_number_t hostinfocnt
= HOST_BASIC_INFO_COUNT
;
400 if (err
= __host_info (__mach_host_self (), HOST_BASIC_INFO
,
401 (natural_t
*) &hostinfo
,
404 if (hostinfocnt
!= HOST_BASIC_INFO_COUNT
)
406 p
= _itoa (hostinfo
.cpu_subtype
, &retryname
[8], 10, 0);
408 p
= _itoa (hostinfo
.cpu_type
, &retryname
[8], 10, 0);
410 abort (); /* XXX write this right if this ever happens */
412 strcpy (retryname
, p
);
421 if (retryname
[1] == 't' && retryname
[2] == 'y')
422 switch (retryname
[3])
424 error_t
opentty (file_t
*result
)
428 err
= __termctty_open_terminal
429 (_dl_hurd_data
->portarray
[INIT_PORT_CTTYID
],
433 mach_port_t ref
= __mach_reply_port ();
434 err
= __io_reauthenticate
435 (unauth
, ref
, MACH_MSG_TYPE_MAKE_SEND
);
437 err
= __auth_user_authenticate
438 (_dl_hurd_data
->portarray
[INIT_PORT_AUTH
],
440 ref
, MACH_MSG_TYPE_MAKE_SEND
,
442 __mach_port_deallocate (__mach_task_self (),
444 __mach_port_destroy (__mach_task_self (), ref
);
450 if (err
= opentty (&fileport
))
451 return __hurd_fail (err
);
455 if (err
= opentty (&startdir
))
456 return __hurd_fail (err
);
458 strcpy (retryname
, &retryname
[4]);
469 return __hurd_fail (EGRATUITOUS
);
474 return __hurd_fail (EGRATUITOUS
);
477 err
= __dir_lookup (startdir
, file_name
, mode
, 0,
478 &doretry
, retryname
, &fileport
);
485 if (fd
!= (int) MACH_PORT_NULL
)
486 __mach_port_deallocate (__mach_task_self (), (mach_port_t
) fd
);
491 mmap (caddr_t addr
, size_t len
, int prot
, int flags
, int fd
, off_t offset
)
495 vm_address_t mapaddr
;
497 vmprot
= VM_PROT_NONE
;
498 if (prot
& PROT_READ
)
499 vmprot
|= VM_PROT_READ
;
500 if (prot
& PROT_WRITE
)
501 vmprot
|= VM_PROT_WRITE
;
502 if (prot
& PROT_EXEC
)
503 vmprot
|= VM_PROT_EXECUTE
;
505 mapaddr
= (vm_address_t
) addr
;
506 err
= __vm_map (__mach_task_self (),
507 &mapaddr
, (vm_size_t
) len
, 0 /*ELF_MACHINE_USER_ADDRESS_MASK*/,
508 !(flags
& MAP_FIXED
),
509 (mach_port_t
) fd
, (vm_offset_t
) offset
,
510 flags
& (MAP_COPY
|MAP_PRIVATE
),
512 (flags
& MAP_INHERIT
) ? VM_INHERIT_COPY
: VM_INHERIT_NONE
);
513 return err
? (caddr_t
) __hurd_fail (err
) : (caddr_t
) mapaddr
;
519 __proc_mark_exit (_dl_hurd_data
->portarray
[INIT_PORT_PROC
],
520 W_EXITCODE (status
, 0));
521 while (__task_terminate (__mach_task_self ()))
522 __mach_task_self_
= (__mach_task_self
) ();
530 /* Minimal `malloc' allocator for use while loading shared libraries.
531 Only small blocks are allocated, and none are ever freed. */
536 static vm_address_t ptr
, end
;
541 /* Consume any unused space in the last page of our data segment. */
543 ptr
= (vm_address_t
) &_end
;
544 end
= round_page (ptr
);
547 /* Make sure the allocation pointer is ideally aligned. */
548 ptr
+= sizeof (double) - 1;
549 ptr
&= ~(sizeof (double) - 1);
553 /* Insufficient space left; allocate another page. */
555 assert (n
<= __vm_page_size
);
556 __vm_allocate (__mach_task_self (), &page
, __vm_page_size
, 1);
559 end
= page
+ __vm_page_size
;
562 block
= (void *) ptr
;
569 /* These should never be called. */
570 void *realloc (void *ptr
, size_t n
) { ptr
+= n
; abort (); }
571 void free (void *ptr
) { ptr
= ptr
; abort (); }
572 weak_symbol (realloc
)
575 /* Avoid signal frobnication in setjmp/longjmp. */
577 int __sigjmp_save (sigjmp_buf env
, int savemask
)
578 { env
[0].__mask_was_saved
= savemask
; return 0; }
579 weak_symbol (__sigjmp_save
)
582 longjmp (jmp_buf env
, int val
) { __longjmp (env
[0].__jmpbuf
, val
); }
583 weak_symbol (longjmp
)
586 /* This function is called by interruptible RPC stubs. For initial
587 dynamic linking, just use the normal mach_msg. Since this defn is
588 weak, the real defn in libc.so will override it if we are linked into
589 the user program (-ldl). */
592 _hurd_intr_rpc_mach_msg (mach_msg_header_t
*msg
,
593 mach_msg_option_t option
,
594 mach_msg_size_t send_size
,
595 mach_msg_size_t rcv_size
,
596 mach_port_t rcv_name
,
597 mach_msg_timeout_t timeout
,
600 return __mach_msg (msg
, option
, send_size
, rcv_size
, rcv_name
,
603 weak_symbol (_hurd_intr_rpc_mach_msg
)