diff options
Diffstat (limited to 'sysdeps/mach')
| -rw-r--r-- | sysdeps/mach/hurd/dup2.c | 40 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/getdtsz.c | 6 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/start.c | 314 |
3 files changed, 33 insertions, 327 deletions
diff --git a/sysdeps/mach/hurd/dup2.c b/sysdeps/mach/hurd/dup2.c index f4ec623b05..c4b16698b8 100644 --- a/sysdeps/mach/hurd/dup2.c +++ b/sysdeps/mach/hurd/dup2.c @@ -58,8 +58,7 @@ DEFUN(__dup2, (fd, fd2), int fd AND int fd2) io_t ctty = _hurd_port_get (&d->ctty, &ctty_ulink); io_t port = _hurd_port_locked_get (&d->port, &ulink); /* Unlocks D. */ - __mutex_lock (&_hurd_dtable_lock); - if (fd2 < 0 || fd2 >= _hurd_dtablesize) + if (fd2 < 0) { errno = EBADF; fd2 = -1; @@ -67,16 +66,37 @@ DEFUN(__dup2, (fd, fd2), int fd AND int fd2) else { /* Get a hold of the destination descriptor. */ - struct hurd_fd *d2 = _hurd_dtable[fd2]; - if (d2 == NULL) + struct hurd_fd *d2; + + if (fd2 >= _hurd_dtablesize) + { + /* The table is not large enough to hold the destination + descriptor. Enlarge it as necessary to allocate this + descriptor. */ + __mutex_unlock (&_hurd_dtable_lock); + /* We still hold FD1's lock, but this is safe because + _hurd_alloc_fd will only examine the cells starting + at FD2. */ + d2 = _hurd_alloc_fd (NULL, fd2); + if (d2) + __spin_unlock (&d2->port.lock); + __mutex_lock (&_hurd_dtable_lock); + } + else { - /* Must allocate a new one. We don't initialize the port cells - with this call so that if it fails (out of memory), we will - not have already added user references for the ports, which we - would then have to deallocate. */ - d2 = _hurd_dtable[fd2] = _hurd_new_fd (MACH_PORT_NULL, - MACH_PORT_NULL); + d2 = _hurd_dtable[fd2]; + if (d2 == NULL) + { + /* Must allocate a new one. We don't initialize the port + cells with this call so that if it fails (out of + memory), we will not have already added user + references for the ports, which we would then have to + deallocate. */ + d2 = _hurd_dtable[fd2] = _hurd_new_fd (MACH_PORT_NULL, + MACH_PORT_NULL); + } } + if (d2 == NULL) { fd2 = -1; diff --git a/sysdeps/mach/hurd/getdtsz.c b/sysdeps/mach/hurd/getdtsz.c index e506963ac3..3e6385f64e 100644 --- a/sysdeps/mach/hurd/getdtsz.c +++ b/sysdeps/mach/hurd/getdtsz.c @@ -29,9 +29,9 @@ DEFUN_VOID(__getdtablesize) { int size; HURD_CRITICAL_BEGIN; - __mutex_lock (&_hurd_dtable_lock); - size = _hurd_dtablesize; - __mutex_unlock (&_hurd_dtable_lock); + __mutex_lock (&_hurd_rlimits_lock); + size = _hurd_rlimits[RLIM_NOFILE].rlim_cur; /* XXX RLIM_INFINITY?? */ + __mutex_unlock (&_hurd_rlimits_lock); HURD_CRITICAL_END; return size; } diff --git a/sysdeps/mach/hurd/start.c b/sysdeps/mach/hurd/start.c deleted file mode 100644 index 9a70e0ddd4..0000000000 --- a/sysdeps/mach/hurd/start.c +++ /dev/null @@ -1,314 +0,0 @@ -/* Copyright (C) 1991, 1992, 1993, 1994, 1995 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., 675 Mass Ave, -Cambridge, MA 02139, USA. */ - -#include <errno.h> -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <hurd.h> -#include <hurd/exec.h> -#include <sysdep.h> -#include <hurd/threadvar.h> -#include <unistd.h> -#include "set-hooks.h" -#include "hurdmalloc.h" /* XXX */ - -/* The first piece of initialized data. */ -int __data_start = 0; -weak_alias (__data_start, data_start) - -mach_port_t *_hurd_init_dtable; -mach_msg_type_number_t _hurd_init_dtablesize; - -unsigned int __hurd_threadvar_max; -unsigned long int __hurd_threadvar_stack_mask; -unsigned long int __hurd_threadvar_stack_offset; - -/* These are set up by _hurdsig_init. */ -unsigned long int __hurd_sigthread_stack_base; -unsigned long int __hurd_sigthread_stack_end; -unsigned long int *__hurd_sigthread_variables; - -vm_address_t _hurd_stack_base; -vm_size_t _hurd_stack_size; - -/* Things that want to be run before _hurd_init or much anything else. - Importantly, these are called before anything tries to use malloc. */ -DEFINE_HOOK (_hurd_preinit_hook, (void)); - -extern void __mach_init (void); -extern void __libc_init (int argc, char **argv, char **envp); -extern int main (int argc, char **argv, char **envp); - -void *(*_cthread_init_routine) (void); /* Returns new SP to use. */ -void (*_cthread_exit_routine) (int status) __attribute__ ((__noreturn__)); - -int _hurd_split_args (char *, size_t, char **); - -/* These communicate values from _start to start1, - where we cannot use the stack for anything. */ -static char *args, *env; -static mach_port_t *portarray; -static int *intarray; -static mach_msg_type_number_t argslen, envlen, portarraysize, intarraysize; -static int flags; -static char **argv, **envp; -static int argc; - - -static void start1 (void) __attribute__ ((__noreturn__)); - - -/* Entry point. This is the first thing in the text segment. - - The exec server started the initial thread in our task with this spot the - PC, and a stack that is presumably big enough. We do basic Mach - initialization so mig-generated stubs work, and then do an exec_startup - RPC on our bootstrap port, to which the exec server responds with the - information passed in the exec call, as well as our original bootstrap - port, and the base address and size of the preallocated stack. - - If using cthreads, we are given a new stack by cthreads initialization and - deallocate the stack set up by the exec server. On the new stack we call - `start1' (above) to do the rest of the startup work. Since the stack may - disappear out from under us in a machine-dependent way, we use a pile of - static variables to communicate the information from exec_startup to start1. - This is unfortunate but preferable to machine-dependent frobnication to copy - the state from the old stack to the new one. */ - -#ifndef START_ARGS -#define START_ARGS void -#endif -#ifdef START_MACHDEP -START_MACHDEP -#define _start _start0 -#endif - -void -_start (START_ARGS) -{ - error_t err; - mach_port_t in_bootstrap; - - /* Basic Mach initialization, must be done before RPCs can be done. */ - __mach_init (); - - /* Run things that want to do initialization as soon as possible. We do - this before exec_startup so that no out of line data arrives and - clutters up the address space before brk initialization. */ - - RUN_HOOK (_hurd_preinit_hook, ()); - - if (err = __task_get_special_port (__mach_task_self (), TASK_BOOTSTRAP_PORT, - &in_bootstrap)) - LOSE; - - if (in_bootstrap != MACH_PORT_NULL) - { - /* Call the exec server on our bootstrap port and - get all our standard information from it. */ - - argslen = envlen = 0; - _hurd_init_dtablesize = portarraysize = intarraysize = 0; - - err = __exec_startup (in_bootstrap, - &_hurd_stack_base, &_hurd_stack_size, - &flags, - &args, &argslen, &env, &envlen, - &_hurd_init_dtable, &_hurd_init_dtablesize, - &portarray, &portarraysize, - &intarray, &intarraysize); - __mach_port_deallocate (__mach_task_self (), in_bootstrap); - } - - if (err || in_bootstrap == MACH_PORT_NULL) - { - /* Either we have no bootstrap port, or the RPC to the exec server - failed. Try to snarf the args in the canonical Mach way. - Hopefully either they will be on the stack as expected, or the - stack will be zeros so we don't crash. Set all our other - variables to have empty information. */ - - /* SNARF_ARGS (ARGC, ARGV, ENVP) snarfs the arguments and environment - from the stack, assuming they were put there by the microkernel. */ - SNARF_ARGS (argc, argv, envp); - - flags = 0; - args = env = NULL; - argslen = envlen = 0; - _hurd_init_dtable = NULL; - _hurd_init_dtablesize = 0; - portarray = NULL; - portarraysize = 0; - intarray = NULL; - intarraysize = 0; - } - else - argv = envp = NULL; - - - /* The user might have defined a value for this, to get more variables. - Otherwise it will be zero on startup. We must make sure it is set - properly before before cthreads initialization, so cthreads can know - how much space to leave for thread variables. */ - if (__hurd_threadvar_max < _HURD_THREADVAR_MAX) - __hurd_threadvar_max = _HURD_THREADVAR_MAX; - - /* Do cthreads initialization and switch to the cthread stack. */ - - if (_cthread_init_routine != NULL) - CALL_WITH_SP (start1, (*_cthread_init_routine) ()); - else - start1 (); - - /* Should never get here. */ - LOSE; -} - - -static void -start1 (void) -{ - register int envc = 0; - - { - /* Check if the stack we are now on is different from - the one described by _hurd_stack_{base,size}. */ - - char dummy; - const vm_address_t newsp = (vm_address_t) &dummy; - - if (_hurd_stack_size != 0 && (newsp < _hurd_stack_base || - newsp - _hurd_stack_base > _hurd_stack_size)) - /* The new stack pointer does not intersect with the - stack the exec server set up for us, so free that stack. */ - __vm_deallocate (__mach_task_self (), - _hurd_stack_base, _hurd_stack_size); - } - - if (__hurd_threadvar_stack_mask == 0) - { - /* We are not using cthreads, so we will have just a single allocated - area for the per-thread variables of the main user thread. */ - unsigned long int i; - __hurd_threadvar_stack_offset - = (unsigned long int) malloc (__hurd_threadvar_max * - sizeof (unsigned long int)); - if (__hurd_threadvar_stack_offset == 0) - __libc_fatal ("Can't allocate single-threaded per-thread variables."); - for (i = 0; i < __hurd_threadvar_max; ++i) - ((unsigned long int *) __hurd_threadvar_stack_offset)[i] = 0; - } - - - /* Turn the block of null-separated strings we were passed for the - arguments and environment into vectors of pointers to strings. */ - - if (! argv) - { - if (args) - /* Count up the arguments so we can allocate ARGV. */ - argc = _hurd_split_args (args, argslen, NULL); - if (! args || argc == 0) - { - /* No arguments passed; set argv to { NULL }. */ - argc = 0; - args = NULL; - argv = (char **) &args; - } - } - - if (! envp) - { - if (env) - /* Count up the environment variables so we can allocate ENVP. */ - envc = _hurd_split_args (env, envlen, NULL); - if (! env || envc == 0) - { - /* No environment passed; set __environ to { NULL }. */ - env = NULL; - envp = (char **) &env; - } - } - - if (! argv) - { - /* There were some arguments. - Allocate space for the vectors of pointers and fill them in. */ - argv = __alloca ((argc + 1) * sizeof (char *)); - _hurd_split_args (args, argslen, argv); - } - - if (! envp) - { - /* There was some environment. - Allocate space for the vectors of pointers and fill them in. */ - envp = __alloca ((envc + 1) * sizeof (char *)); - _hurd_split_args (env, envlen, envp); - } - - __environ = envp; - - if (portarray || intarray) - /* Initialize library data structures, start signal processing, etc. */ - _hurd_init (flags, argv, portarray, portarraysize, intarray, intarraysize); - - /* Random library initialization. These functions may assume that - _hurd_init has already run (if it is going to), and POSIX.1 facilities - are initialized and available. */ - __libc_init (argc, argv, __environ); - - /* Finally, run the user program. */ - (_cthread_exit_routine != NULL ? *_cthread_exit_routine : exit) - (main (argc, argv, __environ)); - - /* Should never get here. */ - LOSE; -} - -/* Split ARGSLEN bytes at ARGS into words, breaking at NUL characters. If - ARGV is not a null pointer, store a pointer to the start of each word in - ARGV[n], and null-terminate ARGV. Return the number of words split. */ - -int -_hurd_split_args (char *args, size_t argslen, char **argv) -{ - char *p = args; - size_t n = argslen; - int argc = 0; - - while (n > 0) - { - char *end = memchr (p, '\0', n); - - if (argv) - argv[argc] = p; - ++argc; - - if (end == NULL) - /* The last argument is unterminated. */ - break; - - n -= end + 1 - p; - p = end + 1; - } - - if (argv) - argv[argc] = NULL; - return argc; -} |