733 lines
20 KiB
C
733 lines
20 KiB
C
/* Operating system support for run-time dynamic linker. Hurd version.
|
||
Copyright (C) 1995, 96, 97, 98, 99 Free Software Foundation, Inc.
|
||
This file is part of the GNU C Library.
|
||
|
||
The GNU C Library is free software; you can redistribute it and/or
|
||
modify it under the terms of the GNU Library General Public License as
|
||
published by the Free Software Foundation; either version 2 of the
|
||
License, or (at your option) any later version.
|
||
|
||
The GNU C Library is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
Library General Public License for more details.
|
||
|
||
You should have received a copy of the GNU Library General Public
|
||
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
||
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||
Boston, MA 02111-1307, USA. */
|
||
|
||
#include <hurd.h>
|
||
#include <link.h>
|
||
#include <unistd.h>
|
||
#include <fcntl.h>
|
||
#include <stdlib.h>
|
||
#include <sys/mman.h>
|
||
#include <elf/ldsodefs.h>
|
||
#include <sys/wait.h>
|
||
#include <assert.h>
|
||
#include <sysdep.h>
|
||
#include <mach/mig_support.h>
|
||
#include "hurdstartup.h"
|
||
#include <mach/host_info.h>
|
||
#include <stdio-common/_itoa.h>
|
||
#include <hurd/auth.h>
|
||
#include <hurd/term.h>
|
||
#include <stdarg.h>
|
||
#include <ctype.h>
|
||
#include <sys/stat.h>
|
||
|
||
#include <entry.h>
|
||
#include <dl-machine.h>
|
||
#include <dl-procinfo.h>
|
||
|
||
extern void __mach_init (void);
|
||
|
||
extern int _dl_argc;
|
||
extern char **_dl_argv;
|
||
extern char **_environ;
|
||
extern void ENTRY_POINT (void);
|
||
|
||
int __libc_enable_secure;
|
||
int __libc_multiple_libcs; /* Defining this here avoids the inclusion
|
||
of init-first. */
|
||
/* This variable containts the lowest stack address ever used. */
|
||
void *__libc_stack_end;
|
||
unsigned long int _dl_hwcap_mask = HWCAP_IMPORTANT;
|
||
|
||
|
||
struct hurd_startup_data *_dl_hurd_data;
|
||
|
||
/* Defining these variables here avoids the inclusion of hurdsig.c. */
|
||
unsigned long int __hurd_sigthread_stack_base;
|
||
unsigned long int __hurd_sigthread_stack_end;
|
||
unsigned long int *__hurd_sigthread_variables;
|
||
|
||
/* Defining these variables here avoids the inclusion of init-first.c.
|
||
We need to provide temporary storage for the per-thread variables
|
||
of the main user thread here, since it is used for storing the
|
||
`errno' variable. Note that this information is lost once we
|
||
relocate the dynamic linker. */
|
||
static unsigned long int threadvars[_HURD_THREADVAR_MAX];
|
||
unsigned long int __hurd_threadvar_stack_offset
|
||
= (unsigned long int) &threadvars;
|
||
unsigned long int __hurd_threadvar_stack_mask;
|
||
|
||
/* XXX loser kludge for vm_map kernel bug */
|
||
static vm_address_t fmha;
|
||
static vm_size_t fmhs;
|
||
static void unfmh(void){
|
||
__vm_deallocate(__mach_task_self(),fmha,fmhs);}
|
||
static void fmh(void) {
|
||
error_t err;int x;mach_port_t p;
|
||
vm_address_t a=0x08000000U,max=VM_MAX_ADDRESS;
|
||
while (!(err=__vm_region(__mach_task_self(),&a,&fmhs,&x,&x,&x,&x,&p,&x))){
|
||
__mach_port_deallocate(__mach_task_self(),p);
|
||
if (a+fmhs>=0x80000000U){
|
||
max=a; break;}
|
||
fmha=a+=fmhs;}
|
||
if (err) assert(err==KERN_NO_SPACE);
|
||
if (!fmha)fmhs=0;else{
|
||
fmhs=max-fmha;
|
||
err = __vm_map (__mach_task_self (),
|
||
&fmha, fmhs, 0, 0, MACH_PORT_NULL, 0, 1,
|
||
VM_PROT_NONE, VM_PROT_NONE, VM_INHERIT_COPY);
|
||
assert_perror(err);}
|
||
}
|
||
/* XXX loser kludge for vm_map kernel bug */
|
||
|
||
|
||
|
||
Elf32_Addr
|
||
_dl_sysdep_start (void **start_argptr,
|
||
void (*dl_main) (const Elf32_Phdr *phdr, Elf32_Word phent,
|
||
Elf32_Addr *user_entry))
|
||
{
|
||
void go (int *argdata)
|
||
{
|
||
extern unsigned int _dl_skip_args; /* rtld.c */
|
||
char **p;
|
||
|
||
/* Cache the information in various global variables. */
|
||
_dl_argc = *argdata;
|
||
_dl_argv = 1 + (char **) argdata;
|
||
_environ = &_dl_argv[_dl_argc + 1];
|
||
for (p = _environ; *p++;); /* Skip environ pointers and terminator. */
|
||
|
||
if ((void *) p == _dl_argv[0])
|
||
{
|
||
static struct hurd_startup_data nodata;
|
||
_dl_hurd_data = &nodata;
|
||
nodata.user_entry = (vm_address_t) &ENTRY_POINT;
|
||
}
|
||
else
|
||
_dl_hurd_data = (void *) p;
|
||
|
||
__libc_enable_secure = _dl_hurd_data->flags & EXEC_SECURE;
|
||
|
||
if (_dl_hurd_data->flags & EXEC_STACK_ARGS &&
|
||
_dl_hurd_data->user_entry == 0)
|
||
_dl_hurd_data->user_entry = (vm_address_t) &ENTRY_POINT;
|
||
|
||
unfmh(); /* XXX */
|
||
|
||
#if 0 /* XXX make this work for real someday... */
|
||
if (_dl_hurd_data->user_entry == (vm_address_t) &ENTRY_POINT)
|
||
/* We were invoked as a command, not as the program interpreter.
|
||
The generic ld.so code supports this: it will parse the args
|
||
as "ld.so PROGRAM [ARGS...]". For booting the Hurd, we
|
||
support an additional special syntax:
|
||
ld.so [-LIBS...] PROGRAM [ARGS...]
|
||
Each LIBS word consists of "FILENAME=MEMOBJ";
|
||
for example "-/lib/libc.so=123" says that the contents of
|
||
/lib/libc.so are found in a memory object whose port name
|
||
in our task is 123. */
|
||
while (_dl_argc > 2 && _dl_argv[1][0] == '-' && _dl_argv[1][1] != '-')
|
||
{
|
||
char *lastslash, *memobjname, *p;
|
||
struct link_map *l;
|
||
mach_port_t memobj;
|
||
error_t err;
|
||
|
||
++_dl_skip_args;
|
||
--_dl_argc;
|
||
p = _dl_argv++[1] + 1;
|
||
|
||
memobjname = strchr (p, '=');
|
||
if (! memobjname)
|
||
_dl_sysdep_fatal ("Bogus library spec: ", p, "\n", NULL);
|
||
*memobjname++ = '\0';
|
||
memobj = 0;
|
||
while (*memobjname != '\0')
|
||
memobj = (memobj * 10) + (*memobjname++ - '0');
|
||
|
||
/* Add a user reference on the memory object port, so we will
|
||
still have one after _dl_map_object_from_fd calls our
|
||
`close'. */
|
||
err = __mach_port_mod_refs (__mach_task_self (), memobj,
|
||
MACH_PORT_RIGHT_SEND, +1);
|
||
assert_perror (err);
|
||
|
||
lastslash = strrchr (p, '/');
|
||
l = _dl_map_object_from_fd (lastslash ? lastslash + 1 : p,
|
||
memobj, strdup (p));
|
||
|
||
/* Squirrel away the memory object port where it
|
||
can be retrieved by the program later. */
|
||
l->l_info[DT_NULL] = (void *) memobj;
|
||
}
|
||
#endif
|
||
|
||
/* Call elf/rtld.c's main program. It will set everything
|
||
up and leave us to transfer control to USER_ENTRY. */
|
||
(*dl_main) ((const Elf32_Phdr *) _dl_hurd_data->phdr,
|
||
_dl_hurd_data->phdrsz / sizeof (Elf32_Phdr),
|
||
&_dl_hurd_data->user_entry);
|
||
|
||
if (_dl_skip_args && _dl_argv[-_dl_skip_args] == (char *) p)
|
||
{
|
||
/* We are ignoring the first few arguments, but we have no Hurd
|
||
startup data. It is magical convention that ARGV[0] == P in
|
||
this case. The startup code in init-first.c will get confused
|
||
if this is not the case, so we must rearrange things to make
|
||
it so. Overwrite the original ARGV[0] at P with
|
||
ARGV[_dl_skip_args]. */
|
||
assert ((char *) p < _dl_argv[0]);
|
||
_dl_argv[0] = strcpy ((char *) p, _dl_argv[0]);
|
||
}
|
||
|
||
{
|
||
extern void _dl_start_user (void);
|
||
/* Unwind the stack to ARGDATA and simulate a return from _dl_start
|
||
to the RTLD_START code which will run the user's entry point. */
|
||
RETURN_TO (argdata, &_dl_start_user, _dl_hurd_data->user_entry);
|
||
}
|
||
}
|
||
|
||
/* Set up so we can do RPCs. */
|
||
__mach_init ();
|
||
|
||
/* Initialize frequently used global variable. */
|
||
_dl_pagesize = __getpagesize ();
|
||
|
||
fmh(); /* XXX */
|
||
|
||
/* See hurd/hurdstartup.c; this deals with getting information
|
||
from the exec server and slicing up the arguments.
|
||
Then it will call `go', above. */
|
||
_hurd_startup (start_argptr, &go);
|
||
|
||
LOSE;
|
||
abort ();
|
||
}
|
||
|
||
void
|
||
_dl_sysdep_start_cleanup (void)
|
||
{
|
||
/* Deallocate the reply port and task port rights acquired by
|
||
__mach_init. We are done with them now, and the user will
|
||
reacquire them for himself when he wants them. */
|
||
__mig_dealloc_reply_port (MACH_PORT_NULL);
|
||
__mach_port_deallocate (__mach_task_self (), __mach_task_self_);
|
||
}
|
||
|
||
/* Minimal open/close/mmap implementation sufficient for initial loading of
|
||
shared libraries. These are weak definitions so that when the
|
||
dynamic linker re-relocates itself to be user-visible (for -ldl),
|
||
it will get the user's definition (i.e. usually libc's). */
|
||
|
||
/* Open FILE_NAME and return a Hurd I/O for it in *PORT, or
|
||
return an error. If STAT is non-zero, stat the file into that stat buffer. */
|
||
static error_t
|
||
open_file (const char *file_name, int mode,
|
||
mach_port_t *port, struct stat *stat)
|
||
{
|
||
enum retry_type doretry;
|
||
char retryname[1024]; /* XXX string_t LOSES! */
|
||
file_t startdir, newpt, fileport;
|
||
int dealloc_dir;
|
||
int nloops;
|
||
error_t err;
|
||
|
||
assert (!(mode & ~O_READ));
|
||
|
||
startdir = _dl_hurd_data->portarray[file_name[0] == '/' ?
|
||
INIT_PORT_CRDIR : INIT_PORT_CWDIR];
|
||
|
||
while (file_name[0] == '/')
|
||
file_name++;
|
||
|
||
if (err = __dir_lookup (startdir, (char *)file_name, mode, 0,
|
||
&doretry, retryname, &fileport))
|
||
return err;
|
||
|
||
dealloc_dir = 0;
|
||
nloops = 0;
|
||
|
||
while (1)
|
||
{
|
||
if (dealloc_dir)
|
||
__mach_port_deallocate (__mach_task_self (), startdir);
|
||
if (err)
|
||
return err;
|
||
|
||
switch (doretry)
|
||
{
|
||
case FS_RETRY_REAUTH:
|
||
{
|
||
mach_port_t ref = __mach_reply_port ();
|
||
err = __io_reauthenticate (fileport, ref, MACH_MSG_TYPE_MAKE_SEND);
|
||
if (! err)
|
||
err = __auth_user_authenticate
|
||
(_dl_hurd_data->portarray[INIT_PORT_AUTH],
|
||
ref, MACH_MSG_TYPE_MAKE_SEND,
|
||
&newpt);
|
||
__mach_port_destroy (__mach_task_self (), ref);
|
||
}
|
||
__mach_port_deallocate (__mach_task_self (), fileport);
|
||
if (err)
|
||
return err;
|
||
fileport = newpt;
|
||
/* Fall through. */
|
||
|
||
case FS_RETRY_NORMAL:
|
||
#ifdef SYMLOOP_MAX
|
||
if (nloops++ >= SYMLOOP_MAX)
|
||
return ELOOP;
|
||
#endif
|
||
|
||
/* An empty RETRYNAME indicates we have the final port. */
|
||
if (retryname[0] == '\0')
|
||
{
|
||
dealloc_dir = 1;
|
||
opened:
|
||
/* We have the file open. Now map it. */
|
||
if (stat)
|
||
err = __io_stat (fileport, stat);
|
||
|
||
if (err)
|
||
{
|
||
if (dealloc_dir)
|
||
__mach_port_deallocate (__mach_task_self (), fileport);
|
||
}
|
||
else
|
||
{
|
||
if (!dealloc_dir)
|
||
__mach_port_mod_refs (__mach_task_self (), fileport,
|
||
MACH_PORT_RIGHT_SEND, 1);
|
||
*port = fileport;
|
||
}
|
||
|
||
return err;
|
||
}
|
||
|
||
startdir = fileport;
|
||
dealloc_dir = 1;
|
||
file_name = retryname;
|
||
break;
|
||
|
||
case FS_RETRY_MAGICAL:
|
||
switch (retryname[0])
|
||
{
|
||
case '/':
|
||
startdir = _dl_hurd_data->portarray[INIT_PORT_CRDIR];
|
||
dealloc_dir = 0;
|
||
if (fileport != MACH_PORT_NULL)
|
||
__mach_port_deallocate (__mach_task_self (), fileport);
|
||
file_name = &retryname[1];
|
||
break;
|
||
|
||
case 'f':
|
||
if (retryname[1] == 'd' && retryname[2] == '/' &&
|
||
isdigit (retryname[3]))
|
||
{
|
||
/* We can't use strtol for the decoding here
|
||
because it brings in hairy locale bloat. */
|
||
char *p;
|
||
int fd = 0;
|
||
for (p = &retryname[3]; isdigit (*p); ++p)
|
||
fd = (fd * 10) + (*p - '0');
|
||
/* Check for excess text after the number. A slash is
|
||
valid; it ends the component. Anything else does not
|
||
name a numeric file descriptor. */
|
||
if (*p != '/' && *p != '\0')
|
||
return ENOENT;
|
||
if (fd < 0 || fd >= _dl_hurd_data->dtablesize ||
|
||
_dl_hurd_data->dtable[fd] == MACH_PORT_NULL)
|
||
/* If the name was a proper number, but the file
|
||
descriptor does not exist, we return EBADF instead
|
||
of ENOENT. */
|
||
return EBADF;
|
||
fileport = _dl_hurd_data->dtable[fd];
|
||
if (*p == '\0')
|
||
{
|
||
/* This descriptor is the file port we want. */
|
||
dealloc_dir = 0;
|
||
goto opened;
|
||
}
|
||
else
|
||
{
|
||
/* Do a normal retry on the remaining components. */
|
||
startdir = fileport;
|
||
dealloc_dir = 1;
|
||
file_name = p + 1; /* Skip the slash. */
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
goto bad_magic;
|
||
break;
|
||
|
||
case 'm':
|
||
if (retryname[1] == 'a' && retryname[2] == 'c' &&
|
||
retryname[3] == 'h' && retryname[4] == 't' &&
|
||
retryname[5] == 'y' && retryname[6] == 'p' &&
|
||
retryname[7] == 'e')
|
||
{
|
||
error_t err;
|
||
struct host_basic_info hostinfo;
|
||
mach_msg_type_number_t hostinfocnt = HOST_BASIC_INFO_COUNT;
|
||
char *p;
|
||
if (err = __host_info (__mach_host_self (), HOST_BASIC_INFO,
|
||
(natural_t *) &hostinfo,
|
||
&hostinfocnt))
|
||
return err;
|
||
if (hostinfocnt != HOST_BASIC_INFO_COUNT)
|
||
return EGRATUITOUS;
|
||
p = _itoa (hostinfo.cpu_subtype, &retryname[8], 10, 0);
|
||
*--p = '/';
|
||
p = _itoa (hostinfo.cpu_type, &retryname[8], 10, 0);
|
||
if (p < retryname)
|
||
abort (); /* XXX write this right if this ever happens */
|
||
if (p > retryname)
|
||
strcpy (retryname, p);
|
||
startdir = fileport;
|
||
dealloc_dir = 1;
|
||
}
|
||
else
|
||
goto bad_magic;
|
||
break;
|
||
|
||
case 't':
|
||
if (retryname[1] == 't' && retryname[2] == 'y')
|
||
switch (retryname[3])
|
||
{
|
||
error_t opentty (file_t *result)
|
||
{
|
||
error_t err;
|
||
file_t unauth;
|
||
err = __termctty_open_terminal
|
||
(_dl_hurd_data->portarray[INIT_PORT_CTTYID],
|
||
mode, &unauth);
|
||
if (! err)
|
||
{
|
||
mach_port_t ref = __mach_reply_port ();
|
||
err = __io_reauthenticate
|
||
(unauth, ref, MACH_MSG_TYPE_MAKE_SEND);
|
||
if (! err)
|
||
err = __auth_user_authenticate
|
||
(_dl_hurd_data->portarray[INIT_PORT_AUTH],
|
||
ref, MACH_MSG_TYPE_MAKE_SEND,
|
||
result);
|
||
__mach_port_deallocate (__mach_task_self (),
|
||
unauth);
|
||
__mach_port_destroy (__mach_task_self (), ref);
|
||
}
|
||
return err;
|
||
}
|
||
|
||
case '\0':
|
||
if (err = opentty (&fileport))
|
||
return err;
|
||
dealloc_dir = 1;
|
||
goto opened;
|
||
case '/':
|
||
if (err = opentty (&startdir))
|
||
return err;
|
||
dealloc_dir = 1;
|
||
strcpy (retryname, &retryname[4]);
|
||
break;
|
||
default:
|
||
goto bad_magic;
|
||
}
|
||
else
|
||
goto bad_magic;
|
||
break;
|
||
|
||
default:
|
||
bad_magic:
|
||
return EGRATUITOUS;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
return EGRATUITOUS;
|
||
}
|
||
|
||
err = __dir_lookup (startdir, (char *)file_name, mode, 0,
|
||
&doretry, retryname, &fileport);
|
||
}
|
||
}
|
||
|
||
int weak_function
|
||
__open (const char *file_name, int mode, ...)
|
||
{
|
||
mach_port_t port;
|
||
error_t err = open_file (file_name, mode, &port, 0);
|
||
if (err)
|
||
return __hurd_fail (err);
|
||
else
|
||
return (int)port;
|
||
}
|
||
|
||
int weak_function
|
||
__close (int fd)
|
||
{
|
||
if (fd != (int) MACH_PORT_NULL)
|
||
__mach_port_deallocate (__mach_task_self (), (mach_port_t) fd);
|
||
return 0;
|
||
}
|
||
|
||
__ssize_t weak_function
|
||
__libc_read (int fd, void *buf, size_t nbytes)
|
||
{
|
||
error_t err;
|
||
char *data;
|
||
mach_msg_type_number_t nread;
|
||
|
||
data = buf;
|
||
err = __io_read ((mach_port_t) fd, &data, &nread, -1, nbytes);
|
||
if (err)
|
||
return __hurd_fail (err);
|
||
|
||
if (data != buf)
|
||
{
|
||
memcpy (buf, data, nread);
|
||
__vm_deallocate (__mach_task_self (), (vm_address_t) data, nread);
|
||
}
|
||
|
||
return nread;
|
||
}
|
||
|
||
__ssize_t weak_function
|
||
__libc_write (int fd, const void *buf, size_t nbytes)
|
||
{
|
||
error_t err;
|
||
mach_msg_type_number_t nwrote;
|
||
|
||
assert (fd < _hurd_init_dtablesize);
|
||
|
||
err = __io_write (_hurd_init_dtable[fd], buf, nbytes, -1, &nwrote);
|
||
if (err)
|
||
return __hurd_fail (err);
|
||
|
||
return nwrote;
|
||
}
|
||
|
||
off_t weak_function
|
||
__lseek (int fd, off_t offset, int whence)
|
||
{
|
||
error_t err;
|
||
|
||
err = __io_seek ((mach_port_t) fd, offset, whence, &offset);
|
||
if (err)
|
||
return __hurd_fail (err);
|
||
|
||
return offset;
|
||
}
|
||
|
||
__ptr_t weak_function
|
||
__mmap (__ptr_t addr, size_t len, int prot, int flags, int fd, off_t offset)
|
||
{
|
||
error_t err;
|
||
vm_prot_t vmprot;
|
||
vm_address_t mapaddr;
|
||
mach_port_t memobj_rd, memobj_wr;
|
||
|
||
vmprot = VM_PROT_NONE;
|
||
if (prot & PROT_READ)
|
||
vmprot |= VM_PROT_READ;
|
||
if (prot & PROT_WRITE)
|
||
vmprot |= VM_PROT_WRITE;
|
||
if (prot & PROT_EXEC)
|
||
vmprot |= VM_PROT_EXECUTE;
|
||
|
||
if (flags & MAP_ANON)
|
||
memobj_rd = MACH_PORT_NULL;
|
||
else
|
||
{
|
||
assert (!(flags & MAP_SHARED));
|
||
err = __io_map ((mach_port_t) fd, &memobj_rd, &memobj_wr);
|
||
if (err)
|
||
return (__ptr_t) __hurd_fail (err);
|
||
__mach_port_deallocate (__mach_task_self (), memobj_wr);
|
||
}
|
||
|
||
mapaddr = (vm_address_t) addr;
|
||
err = __vm_map (__mach_task_self (),
|
||
&mapaddr, (vm_size_t) len, 0 /*ELF_MACHINE_USER_ADDRESS_MASK*/,
|
||
!(flags & MAP_FIXED),
|
||
memobj_rd,
|
||
(vm_offset_t) offset,
|
||
flags & (MAP_COPY|MAP_PRIVATE),
|
||
vmprot, VM_PROT_ALL,
|
||
(flags & MAP_SHARED) ? VM_INHERIT_SHARE : VM_INHERIT_COPY);
|
||
if (err == KERN_NO_SPACE && (flags & MAP_FIXED))
|
||
{
|
||
/* XXX this is not atomic as it is in unix! */
|
||
/* The region is already allocated; deallocate it first. */
|
||
err = __vm_deallocate (__mach_task_self (), mapaddr, len);
|
||
if (! err)
|
||
err = __vm_map (__mach_task_self (),
|
||
&mapaddr, (vm_size_t) len, 0 /*ELF_MACHINE_USER_ADDRESS_MASK*/,
|
||
!(flags & MAP_FIXED),
|
||
memobj_rd, (vm_offset_t) offset,
|
||
flags & (MAP_COPY|MAP_PRIVATE),
|
||
vmprot, VM_PROT_ALL,
|
||
(flags & MAP_SHARED)
|
||
? VM_INHERIT_SHARE : VM_INHERIT_COPY);
|
||
}
|
||
|
||
if ((flags & MAP_ANON) == 0)
|
||
__mach_port_deallocate (__mach_task_self (), memobj_rd);
|
||
|
||
return err ? (__ptr_t) __hurd_fail (err) : (__ptr_t) mapaddr;
|
||
}
|
||
|
||
int weak_function
|
||
__fxstat (int vers, int fd, struct stat *buf)
|
||
{
|
||
error_t err;
|
||
|
||
assert (vers == _STAT_VER);
|
||
|
||
err = __io_stat ((mach_port_t) fd, buf);
|
||
if (err)
|
||
return __hurd_fail (err);
|
||
|
||
return 0;
|
||
}
|
||
|
||
int weak_function
|
||
__xstat (int vers, const char *file, struct stat *buf)
|
||
{
|
||
error_t err;
|
||
mach_port_t port;
|
||
|
||
assert (vers == _STAT_VER);
|
||
|
||
err = open_file (file, 0, &port, buf);
|
||
if (err)
|
||
return __hurd_fail (err);
|
||
|
||
__mach_port_deallocate (__mach_task_self (), port);
|
||
|
||
return 0;
|
||
}
|
||
|
||
pid_t weak_function
|
||
__getpid ()
|
||
{
|
||
pid_t pid, ppid;
|
||
int orphaned;
|
||
|
||
if (__proc_getpids (_dl_hurd_data->portarray[INIT_PORT_PROC],
|
||
&pid, &ppid, &orphaned))
|
||
return -1;
|
||
|
||
return pid;
|
||
}
|
||
|
||
/* This is called only in some strange cases trying to guess a value
|
||
for $ORIGIN for the executable. The dynamic linker copes with
|
||
getcwd failing (dl-object.c), and it's too much hassle to include
|
||
the functionality here. (We could, it just requires duplicating or
|
||
reusing getcwd.c's code but using our special lookup function as in
|
||
`open', above.) */
|
||
char *
|
||
weak_function
|
||
__getcwd (char *buf, size_t size)
|
||
{
|
||
errno = ENOSYS;
|
||
return NULL;
|
||
}
|
||
|
||
void weak_function
|
||
_exit (int status)
|
||
{
|
||
__proc_mark_exit (_dl_hurd_data->portarray[INIT_PORT_PROC],
|
||
W_EXITCODE (status, 0), 0);
|
||
while (__task_terminate (__mach_task_self ()))
|
||
__mach_task_self_ = (__mach_task_self) ();
|
||
}
|
||
|
||
/* Try to get a machine dependent instruction which will make the
|
||
program crash. This is used in case everything else fails. */
|
||
#include <abort-instr.h>
|
||
#ifndef ABORT_INSTRUCTION
|
||
/* No such instruction is available. */
|
||
# define ABORT_INSTRUCTION
|
||
#endif
|
||
|
||
void weak_function
|
||
abort (void)
|
||
{
|
||
/* Try to abort using the system specific command. */
|
||
ABORT_INSTRUCTION;
|
||
|
||
/* If the abort instruction failed, exit. */
|
||
_exit (127);
|
||
|
||
/* If even this fails, make sure we never return. */
|
||
while (1)
|
||
/* Try for ever and ever. */
|
||
ABORT_INSTRUCTION;
|
||
}
|
||
|
||
/* This function is called by interruptible RPC stubs. For initial
|
||
dynamic linking, just use the normal mach_msg. Since this defn is
|
||
weak, the real defn in libc.so will override it if we are linked into
|
||
the user program (-ldl). */
|
||
|
||
error_t weak_function
|
||
_hurd_intr_rpc_mach_msg (mach_msg_header_t *msg,
|
||
mach_msg_option_t option,
|
||
mach_msg_size_t send_size,
|
||
mach_msg_size_t rcv_size,
|
||
mach_port_t rcv_name,
|
||
mach_msg_timeout_t timeout,
|
||
mach_port_t notify)
|
||
{
|
||
return __mach_msg (msg, option, send_size, rcv_size, rcv_name,
|
||
timeout, notify);
|
||
}
|
||
|
||
|
||
void
|
||
internal_function
|
||
_dl_show_auxv (void)
|
||
{
|
||
/* There is nothing to print. Hurd has no auxiliary vector. */
|
||
}
|
||
|
||
|
||
/* Return an array of useful/necessary hardware capability names. */
|
||
const struct r_strlenpair *
|
||
internal_function
|
||
_dl_important_hwcaps (const char *platform, size_t platform_len, size_t *sz,
|
||
size_t *max_capstrlen)
|
||
{
|
||
struct r_strlenpair *result;
|
||
|
||
/* Return an empty array. Hurd has no hardware capabilities. */
|
||
result = (struct r_strlenpair *) malloc (sizeof (*result));
|
||
if (result == NULL)
|
||
_dl_signal_error (ENOMEM, NULL, "cannot create capability list");
|
||
|
||
result[0].str = (char *) result; /* Does not really matter. */
|
||
result[0].len = 0;
|
||
|
||
*sz = 1;
|
||
return result;
|
||
}
|