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_threadvar_stack_mask;
57 /* XXX loser kludge for vm_map kernel bug */
58 static vm_address_t fmha;
59 static vm_size_t fmhs;
60 static void unfmh(void){
61 __vm_deallocate(__mach_task_self(),fmha,fmhs);}
62 static void fmh(void) {
63 error_t err;int x;mach_port_t p;
64 vm_address_t a=0x08000000U,max=VM_MAX_ADDRESS;
65 while (!(err=__vm_region(__mach_task_self(),&a,&fmhs,&x,&x,&x,&x,&p,&x))){
66 __mach_port_deallocate(__mach_task_self(),p);
67 if (a+fmhs>=0x80000000U){
70 if (err) assert(err==KERN_NO_SPACE);
71 if (!fmha)fmhs=0;else{
73 err = __vm_map (__mach_task_self (),
74 &fmha, fmhs, 0, 0, MACH_PORT_NULL, 0, 1,
75 VM_PROT_NONE, VM_PROT_NONE, VM_INHERIT_COPY);
78 /* XXX loser kludge for vm_map kernel bug */
83 _dl_sysdep_start (void **start_argptr,
84 void (*dl_main) (const Elf32_Phdr *phdr, Elf32_Word phent,
85 Elf32_Addr *user_entry))
87 extern void _start ();
89 void go (int *argdata)
91 extern unsigned int _dl_skip_args; /* rtld.c */
94 /* Cache the information in various global variables. */
96 _dl_argv = 1 + (char **) argdata;
97 _environ = &_dl_argv[_dl_argc + 1];
98 for (p = _environ; *p++;); /* Skip environ pointers and terminator. */
100 if ((void *) p == _dl_argv[0])
102 static struct hurd_startup_data nodata;
103 _dl_hurd_data = &nodata;
104 nodata.user_entry = (vm_address_t) &_start;
107 _dl_hurd_data = (void *) p;
109 __libc_enable_secure = _dl_hurd_data->flags & EXEC_SECURE;
111 if (_dl_hurd_data->flags & EXEC_STACK_ARGS &&
112 _dl_hurd_data->user_entry == 0)
113 _dl_hurd_data->user_entry = (vm_address_t) &_start;
117 if (_dl_hurd_data->user_entry == (vm_address_t) &_start)
118 /* We were invoked as a command, not as the program interpreter.
119 The generic ld.so code supports this: it will parse the args
120 as "ld.so PROGRAM [ARGS...]". For booting the Hurd, we
121 support an additional special syntax:
122 ld.so [-LIBS...] PROGRAM [ARGS...]
123 Each LIBS word consists of "FILENAME=MEMOBJ";
124 for example "-/lib/libc.so=123" says that the contents of
125 /lib/libc.so are found in a memory object whose port name
126 in our task is 123. */
127 while (_dl_argc > 2 && _dl_argv[1][0] == '-' && _dl_argv[1][1] != '-')
129 char *lastslash, *memobjname, *p;
136 p = _dl_argv++[1] + 1;
138 memobjname = strchr (p, '=');
140 _dl_sysdep_fatal ("Bogus library spec: ", p, "\n", NULL);
141 *memobjname++ = '\0';
143 while (*memobjname != '\0')
144 memobj = (memobj * 10) + (*memobjname++ - '0');
146 /* Add a user reference on the memory object port, so we will
147 still have one after _dl_map_object_from_fd calls our
149 err = __mach_port_mod_refs (__mach_task_self (), memobj,
150 MACH_PORT_RIGHT_SEND, +1);
153 lastslash = strrchr (p, '/');
154 l = _dl_map_object_from_fd (lastslash ? lastslash + 1 : p,
157 /* Squirrel away the memory object port where it
158 can be retrieved by the program later. */
159 l->l_info[DT_NULL] = (void *) memobj;
162 /* Call elf/rtld.c's main program. It will set everything
163 up and leave us to transfer control to USER_ENTRY. */
164 (*dl_main) ((const Elf32_Phdr *) _dl_hurd_data->phdr,
165 _dl_hurd_data->phdrsz / sizeof (Elf32_Phdr),
166 &_dl_hurd_data->user_entry);
168 if (_dl_skip_args && _dl_argv[-_dl_skip_args] == (char *) p)
170 /* We are ignoring the first few arguments, but we have no Hurd
171 startup data. It is magical convention that ARGV[0] == P in
172 this case. The startup code in init-first.c will get confused
173 if this is not the case, so we must rearrange things to make
174 it so. Overwrite the original ARGV[0] at P with
175 ARGV[_dl_skip_args]. */
176 assert ((char *) p < _dl_argv[0]);
177 _dl_argv[0] = strcpy ((char *) p, _dl_argv[0]);
181 extern void _dl_start_user (void);
182 /* Unwind the stack to ARGDATA and simulate a return from _dl_start
183 to the RTLD_START code which will run the user's entry point. */
184 RETURN_TO (argdata, &_dl_start_user, _dl_hurd_data->user_entry);
188 /* Set up so we can do RPCs. */
193 /* See hurd/hurdstartup.c; this deals with getting information
194 from the exec server and slicing up the arguments.
195 Then it will call `go', above. */
196 _hurd_startup (start_argptr, &go);
203 _dl_sysdep_start_cleanup (void)
205 /* Deallocate the reply port and task port rights acquired by
206 __mach_init. We are done with them now, and the user will
207 reacquire them for himself when he wants them. */
208 __mig_dealloc_reply_port (MACH_PORT_NULL);
209 __mach_port_deallocate (__mach_task_self (), __mach_task_self_);
213 _dl_sysdep_fatal (const char *msg, ...)
220 size_t len = strlen (msg);
221 mach_msg_type_number_t nwrote;
224 if (__io_write (_hurd_init_dtable[2], msg, len, -1, &nwrote))
228 } while (nwrote > 0);
229 msg = va_arg (ap, const char *);
238 _dl_sysdep_error (const char *msg, ...)
245 size_t len = strlen (msg);
246 mach_msg_type_number_t nwrote;
249 if (__io_write (_hurd_init_dtable[2], msg, len, -1, &nwrote))
253 } while (nwrote > 0);
254 msg = va_arg (ap, const char *);
261 _dl_sysdep_message (const char *msg, ...)
268 size_t len = strlen (msg);
269 mach_msg_type_number_t nwrote;
272 if (__io_write (_hurd_init_dtable[1], msg, len, -1, &nwrote))
276 } while (nwrote > 0);
277 msg = va_arg (ap, const char *);
282 /* Minimal open/close/mmap implementation sufficient for initial loading of
283 shared libraries. These are weak definitions so that when the
284 dynamic linker re-relocates itself to be user-visible (for -ldl),
285 /* Minimal open/close/mmap implementation sufficient for initial loading of
286 shared libraries. These are weak definitions so that when the
287 dynamic linker re-relocates itself to be user-visible (for -ldl),
288 it will get the user's definition (i.e. usually libc's). */
290 /* Open FILE_NAME and return a read-mmappable port in MEMOBJ_RD for it, or
291 return an error. If STAT is non-zero, stat the file into that stat buffer. */
293 open_file (const char *file_name, int mode,
294 mach_port_t *memobj_rd, struct stat *stat)
296 enum retry_type doretry;
297 char retryname[1024]; /* XXX string_t LOSES! */
298 file_t startdir, newpt, fileport;
303 assert (mode == O_RDONLY);
305 startdir = _dl_hurd_data->portarray[file_name[0] == '/' ?
306 INIT_PORT_CRDIR : INIT_PORT_CWDIR];
308 while (file_name[0] == '/')
311 if (err = __dir_lookup (startdir, (char *)file_name, mode, 0,
312 &doretry, retryname, &fileport))
321 __mach_port_deallocate (__mach_task_self (), startdir);
327 case FS_RETRY_REAUTH:
329 mach_port_t ref = __mach_reply_port ();
330 err = __io_reauthenticate (fileport, ref, MACH_MSG_TYPE_MAKE_SEND);
332 err = __auth_user_authenticate
333 (_dl_hurd_data->portarray[INIT_PORT_AUTH],
334 ref, MACH_MSG_TYPE_MAKE_SEND,
336 __mach_port_destroy (__mach_task_self (), ref);
338 __mach_port_deallocate (__mach_task_self (), fileport);
344 case FS_RETRY_NORMAL:
346 if (nloops++ >= SYMLOOP_MAX)
350 /* An empty RETRYNAME indicates we have the final port. */
351 if (retryname[0] == '\0')
353 mach_port_t memobj_wr;
358 /* We have the file open. Now map it. */
361 err = __io_stat (fileport, stat);
363 err = __io_map (fileport, memobj_rd, &memobj_wr);
366 __mach_port_deallocate (__mach_task_self (), fileport);
370 if (memobj_wr != MACH_PORT_NULL)
371 __mach_port_deallocate (__mach_task_self (), memobj_wr);
378 file_name = retryname;
381 case FS_RETRY_MAGICAL:
382 switch (retryname[0])
385 startdir = _dl_hurd_data->portarray[INIT_PORT_CRDIR];
387 if (fileport != MACH_PORT_NULL)
388 __mach_port_deallocate (__mach_task_self (), fileport);
389 file_name = &retryname[1];
393 if (retryname[1] == 'd' && retryname[2] == '/' &&
394 isdigit (retryname[3]))
396 /* We can't use strtol for the decoding here
397 because it brings in hairy locale bloat. */
400 for (p = &retryname[3]; isdigit (*p); ++p)
401 fd = (fd * 10) + (*p - '0');
402 /* Check for excess text after the number. A slash is
403 valid; it ends the component. Anything else does not
404 name a numeric file descriptor. */
405 if (*p != '/' && *p != '\0')
407 if (fd < 0 || fd >= _dl_hurd_data->dtablesize ||
408 _dl_hurd_data->dtable[fd] == MACH_PORT_NULL)
409 /* If the name was a proper number, but the file
410 descriptor does not exist, we return EBADF instead
413 fileport = _dl_hurd_data->dtable[fd];
416 /* This descriptor is the file port we want. */
422 /* Do a normal retry on the remaining components. */
425 file_name = p + 1; /* Skip the slash. */
434 if (retryname[1] == 'a' && retryname[2] == 'c' &&
435 retryname[3] == 'h' && retryname[4] == 't' &&
436 retryname[5] == 'y' && retryname[6] == 'p' &&
440 struct host_basic_info hostinfo;
441 mach_msg_type_number_t hostinfocnt = HOST_BASIC_INFO_COUNT;
443 if (err = __host_info (__mach_host_self (), HOST_BASIC_INFO,
444 (natural_t *) &hostinfo,
447 if (hostinfocnt != HOST_BASIC_INFO_COUNT)
449 p = _itoa (hostinfo.cpu_subtype, &retryname[8], 10, 0);
451 p = _itoa (hostinfo.cpu_type, &retryname[8], 10, 0);
453 abort (); /* XXX write this right if this ever happens */
455 strcpy (retryname, p);
464 if (retryname[1] == 't' && retryname[2] == 'y')
465 switch (retryname[3])
467 error_t opentty (file_t *result)
471 err = __termctty_open_terminal
472 (_dl_hurd_data->portarray[INIT_PORT_CTTYID],
476 mach_port_t ref = __mach_reply_port ();
477 err = __io_reauthenticate
478 (unauth, ref, MACH_MSG_TYPE_MAKE_SEND);
480 err = __auth_user_authenticate
481 (_dl_hurd_data->portarray[INIT_PORT_AUTH],
482 ref, MACH_MSG_TYPE_MAKE_SEND,
484 __mach_port_deallocate (__mach_task_self (),
486 __mach_port_destroy (__mach_task_self (), ref);
492 if (err = opentty (&fileport))
497 if (err = opentty (&startdir))
500 strcpy (retryname, &retryname[4]);
519 err = __dir_lookup (startdir, (char *)file_name, mode, 0,
520 &doretry, retryname, &fileport);
525 __open (const char *file_name, int mode, ...)
527 mach_port_t memobj_rd;
528 error_t err = open_file (file_name, mode, &memobj_rd, 0);
530 return __hurd_fail (err);
532 return (int)memobj_rd;
538 if (fd != (int) MACH_PORT_NULL)
539 __mach_port_deallocate (__mach_task_self (), (mach_port_t) fd);
543 caddr_t weak_function
544 __mmap (caddr_t addr, size_t len, int prot, int flags, int fd, off_t offset)
548 vm_address_t mapaddr;
550 vmprot = VM_PROT_NONE;
551 if (prot & PROT_READ)
552 vmprot |= VM_PROT_READ;
553 if (prot & PROT_WRITE)
554 vmprot |= VM_PROT_WRITE;
555 if (prot & PROT_EXEC)
556 vmprot |= VM_PROT_EXECUTE;
558 mapaddr = (vm_address_t) addr;
559 err = __vm_map (__mach_task_self (),
560 &mapaddr, (vm_size_t) len, 0 /*ELF_MACHINE_USER_ADDRESS_MASK*/,
561 !(flags & MAP_FIXED),
562 (flags & MAP_ANON) ? MACH_PORT_NULL : (mach_port_t) fd,
563 (vm_offset_t) offset,
564 flags & (MAP_COPY|MAP_PRIVATE),
566 (flags & MAP_SHARED) ? VM_INHERIT_SHARE : VM_INHERIT_COPY);
567 if (err == KERN_NO_SPACE && (flags & MAP_FIXED))
571 _dl_sysdep_fatal (const char *msg, ...)
578 size_t len = strlen (msg);
579 mach_msg_type_number_t nwrote;
582 if (__io_write (_hurd_init_dtable[2], msg, len, -1, &nwrote))
586 } while (nwrote > 0);
587 msg = va_arg (ap, const char *);
596 _dl_sysdep_error (const char *msg, ...)
603 size_t len = strlen (msg);
604 mach_msg_type_number_t nwrote;
607 if (__io_write (_hurd_init_dtable[2], msg, len, -1, &nwrote))
611 } while (nwrote > 0);
612 msg = va_arg (ap, const char *);
619 _dl_sysdep_message (const char *msg, ...)
626 size_t len = strlen (msg);
627 mach_msg_type_number_t nwrote;
630 if (__io_write (_hurd_init_dtable[1], msg, len, -1, &nwrote))
634 } while (nwrote > 0);
635 msg = va_arg (ap, const char *);
639 /* XXX this is not atomic as it is in unix! */
640 /* The region is already allocated; deallocate it first. */
641 err = __vm_deallocate (__mach_task_self (), mapaddr, len);
643 err = __vm_map (__mach_task_self (),
644 &mapaddr, (vm_size_t) len, 0 /*ELF_MACHINE_USER_ADDRESS_MASK*/,
645 !(flags & MAP_FIXED),
646 (mach_port_t) fd, (vm_offset_t) offset,
647 flags & (MAP_COPY|MAP_PRIVATE),
650 ? VM_INHERIT_SHARE : VM_INHERIT_COPY);
653 return err ? (caddr_t) __hurd_fail (err) : (caddr_t) mapaddr;
659 __proc_mark_exit (_dl_hurd_data->portarray[INIT_PORT_PROC],
660 W_EXITCODE (status, 0), 0);
661 while (__task_terminate (__mach_task_self ()))
662 __mach_task_self_ = (__mach_task_self) ();
665 /* Read the whole contents of FILE into new mmap'd space with given
666 protections. The size of the file is returned in SIZE. */
669 _dl_sysdep_read_whole_file (const char *file, size_t *size, int prot)
672 mach_port_t memobj_rd;
674 error_t err = open_file (file, O_RDONLY, &memobj_rd, &stat);
678 /* Map a copy of the file contents. */
679 contents = __mmap (0, stat.st_size, prot, MAP_COPY, memobj_rd, 0);
680 if (contents == (void *)-1)
683 *size = stat.st_size;
685 __mach_port_deallocate (__mach_task_self (), memobj_rd);
696 /* This function is called by interruptible RPC stubs. For initial
697 dynamic linking, just use the normal mach_msg. Since this defn is
698 weak, the real defn in libc.so will override it if we are linked into
699 the user program (-ldl). */
701 error_t weak_function
702 _hurd_intr_rpc_mach_msg (mach_msg_header_t *msg,
703 mach_msg_option_t option,
704 mach_msg_size_t send_size,
705 mach_msg_size_t rcv_size,
706 mach_port_t rcv_name,
707 mach_msg_timeout_t timeout,
710 return __mach_msg (msg, option, send_size, rcv_size, rcv_name,