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* sysdeps/mach/hurd/brk.c (DATA_SIZE): Bump to 128MB.
(_hurd_set_brk): Try to allocate more space when we run out. * sysdeps/generic/sbrk.c: If __curbrk is zero, call __brk with zero and examine it again. * sysdeps/unix/sysv/linux/i386/brk.c: New file. * sysdeps/unix/sysv/linux/i386/brk.S: File removed. * sysdeps/unix/sysv/linux/i386/sbrk.S: File removed. * sysdeps/unix/sysv/linux/dl-sysdep.c: New file.
This commit is contained in:
Roland McGrath
parent
0fe4e55291
commit
683158e0c4
@ -1,7 +1,14 @@
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Sat Dec 2 03:47:27 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
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* sysdeps/unix/sysv/linux/i386/sbrk.S: File removed.
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* sysdeps/mach/hurd/brk.c (DATA_SIZE): Bump to 128MB.
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(_hurd_set_brk): Try to allocate more space when we run out.
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* sysdeps/generic/sbrk.c: If __curbrk is zero, call __brk with
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zero and examine it again.
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* sysdeps/unix/sysv/linux/i386/brk.c: New file.
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* sysdeps/unix/sysv/linux/i386/brk.S: File removed.
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* sysdeps/unix/sysv/linux/i386/sbrk.S: File removed.
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* sysdeps/unix/sysv/linux/dl-sysdep.c: New file.
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* sysdeps/generic/dl-sysdep.c (_dl_sysdep_start) [DL_SYSDEP_INIT]:
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Invoke this macro before calling DL_MAIN.
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@ -15,26 +15,30 @@ You should have received a copy of the GNU General Public License
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along with the GNU C Library; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <unistd.h>
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#include <errno.h>
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/* Defined in brk.c. */
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extern PTR __curbrk;
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extern int EXFUN(__brk, (PTR addr));
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extern void *__curbrk;
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extern int __brk (void *addr);
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/* Extend the process's data space by INCREMENT.
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If INCREMENT is negative, shrink data space by - INCREMENT.
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Return start of new space allocated, or -1 for errors. */
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PTR
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DEFUN(__sbrk, (increment), int increment)
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void *
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__sbrk (int increment)
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{
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char *oldbrk;
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void *oldbrk;
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if (__curbrk == 0 && __brk (0) < 0)
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return (void *) -1;
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if (increment == 0)
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return __curbrk;
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oldbrk = __curbrk;
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if (__brk(oldbrk + increment) < 0)
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return (PTR) -1;
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if (__brk (oldbrk + increment) < 0)
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return (void *) -1;
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return oldbrk;
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}
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@ -23,8 +23,8 @@ Cambridge, MA 02139, USA. */
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#include <cthreads.h> /* For `struct mutex'. */
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/* Initial maximum size of the data segment (32MB, which is arbitrary). */
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#define DATA_SIZE (32 * 1024 * 1024)
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/* Initial maximum size of the data segment (this is arbitrary). */
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#define DATA_SIZE (128 * 1024 * 1024)
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/* Up to the page including this address is allocated from the kernel.
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@ -85,13 +85,20 @@ _hurd_set_brk (vm_address_t addr)
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return -1;
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}
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/* Make the memory accessible. */
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if (err = __vm_protect (__mach_task_self (), pagebrk, pagend - pagebrk,
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0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE))
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if (pagend > _hurd_data_end)
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{
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errno = err;
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return -1;
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/* We didn't allocate enough space! Hopefully we can get some more! */
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err = __vm_allocate (__mach_task_self (), &pagebrk, pagend - pagebrk, 0);
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if (! err)
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_hurd_data_end = pagend;
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}
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else
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/* Make the memory accessible. */
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err = __vm_protect (__mach_task_self (), pagebrk, pagend - pagebrk,
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0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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if (err)
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return __hurd_fail (err);
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_hurd_brk = addr;
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return 0;
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@ -112,7 +119,7 @@ init_brk (void)
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pagend = round_page (_hurd_brk);
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_hurd_data_end = (vm_address_t) &__data_start + DATA_SIZE;
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_hurd_data_end = round_page ((vm_address_t) &__data_start + DATA_SIZE);
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if (pagend < _hurd_data_end)
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{
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44
sysdeps/unix/sysv/linux/dl-sysdep.c
Normal file
44
sysdeps/unix/sysv/linux/dl-sysdep.c
Normal file
@ -0,0 +1,44 @@
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/* Dynamic linker system dependencies for Linux.
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Copyright (C) 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/* Linux needs some special initialization, but otherwise uses
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the generic dynamic linker system interface code. */
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#include <unistd.h>
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#define DL_SYSDEP_INIT frob_brk ()
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static inline void
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frob_brk (void)
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{
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extern void _end;
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__brk (0); /* Initialize the break. */
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if (__sbrk (0) == &_end)
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{
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/* The dynamic linker was run as a program, and so the initial break
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starts just after our bss, at &_end. The malloc in dl-minimal.c
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will consume the rest of this page, so tell the kernel to move the
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break up that far. When the user program examines its break, it
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will see this new value and not clobber our data. */
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size_t pg = __getpagesize ();
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__sbrk (pg - ((&_end - (void *) 0) & pg));
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}
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}
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#include <sysdeps/generic/dl-sysdep.c>
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49
sysdeps/unix/sysv/linux/i386/brk.c
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49
sysdeps/unix/sysv/linux/i386/brk.c
Normal file
@ -0,0 +1,49 @@
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/* brk system call for Linux/i386.
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Copyright (C) 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <errno.h>
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#include <unistd.h>
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#include <sysdep.h>
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void *__curbrk;
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int
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__brk (void *addr)
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{
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void *newbrk, *scratch;
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asm ("movl %%ebx, %1\n" /* Save %ebx in scratch register. */
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"movl %3, %%ebx\n" /* Put ADDR in %ebx to be syscall arg. */
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"int $0x80 # %2\n" /* Perform the system call. */
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"movl %1, %%ebx\n" /* Restore %ebx from scratch register. */
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: "=a" (newbrk), "=r" (scratch)
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: "0" (SYS_ify (brk)), "g" (addr));
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__curbrk = newbrk;
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if (newbrk < addr)
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{
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errno = ENOMEM;
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return -1;
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}
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return 0;
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}
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weak_alias (__brk, brk)
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