@@ -1,8 +1,5 @@
libc {
GLIBC_2.0 {
- # necessary for the Hurd brk implementation
- _end;
-
# variables used in macros & inline functions
__hurd_threadvar_stack_mask; __hurd_threadvar_stack_offset;
@@ -19,6 +19,7 @@
#include <hurd.h>
#include <hurd/resource.h>
#include <cthreads.h> /* For `struct mutex'. */
+#include <vm_param.h>
/* Initial maximum size of the data segment (this is arbitrary). */
@@ -39,9 +40,7 @@ weak_alias (_hurd_brk, ___brk_addr)
struct mutex _hurd_brk_lock;
-extern int __data_start, _end;
-weak_extern (__data_start)
-static vm_address_t static_data_start;
+static vm_address_t brk_start;
/* Set the end of the process's data space to INADDR.
@@ -91,7 +90,7 @@ _hurd_set_brk (vm_address_t addr)
rlimit = _hurd_rlimits[RLIMIT_DATA].rlim_cur;
__mutex_unlock (&_hurd_rlimit_lock);
- if (addr - static_data_start > rlimit)
+ if (addr - brk_start > rlimit)
{
/* Need to increase the resource limit. */
errno = ENOMEM;
@@ -138,17 +137,18 @@ init_brk (void)
__mutex_init (&_hurd_brk_lock);
- static_data_start = (vm_address_t) (&__data_start ?: &_end);
+ brk_start = (vm_address_t) BRK_START;
/* If _hurd_brk is already set, don't change it. The assumption is that
it was set in a previous run before something like Emacs's unexec was
called and dumped all the data up to the break at that point. */
- if (_hurd_brk == 0)
- _hurd_brk = (vm_address_t) &_end;
+ if (_hurd_brk == 0) {
+ _hurd_brk = (vm_address_t) BRK_START;
+ }
pagend = round_page (_hurd_brk);
- _hurd_data_end = round_page (static_data_start + DATA_SIZE);
+ _hurd_data_end = round_page (brk_start + DATA_SIZE);
if (pagend < _hurd_data_end)
{
@@ -554,7 +554,6 @@ GLIBC_2.2.6 __xstat64 F
GLIBC_2.2.6 _authenticate F
GLIBC_2.2.6 _dl_mcount_wrapper F
GLIBC_2.2.6 _dl_mcount_wrapper_check F
-GLIBC_2.2.6 _end D 0x0
GLIBC_2.2.6 _environ D 0x4
GLIBC_2.2.6 _exit F
GLIBC_2.2.6 _flushlbf F
new file mode 100644
@@ -0,0 +1,24 @@
+/* Copyright (C) 2020 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _I386_VM_PARAM_H
+#define _I386_VM_PARAM_H
+
+/* Arbitrary start of the brk. This is after usual binary and library mappings. */
+#define BRK_START 0x10000000
+
+#endif /* i386/vm_param.h */