1 files changed, 91 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/brk.c b/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/brk.c
new file mode 100644
index 0000000000..222c3b313a
--- /dev/null
+++ b/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/brk.c
@@ -0,0 +1,91 @@
+/* Copyright (C) 2008 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by David Bartley <dtbartle@csclub.uwaterloo.ca>, 2008.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <inline-syscall.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/gmon.h>
+#include <ldsodefs.h>
+#include <dlfcn.h>
+
+DECLARE_INLINE_SYSCALL (int, brk, __caddr_t *addr);
+
+/*
+  Solaris will round the break up to an 8 - 16 byte alignment. We don't take
+  this into account, which is safe; we will always just assume a slightly
+  smaller amount of core than we actually have available.
+
+  Solaris doesn't return the current break via brk, so we track it here.
+
+  For dynamic executables, the kernel does not set the initial break. It
+  expects libc to set the initial break to the tail of the executable being
+  loaded. For static executables we use &_end.
+
+  See uts/common/exec/elf/elf.c, line 800.
+*/
+
+#define BRK_ALIGN(addr) (void *)(((uintptr_t)addr + 0x7) & ~(uintptr_t)0x7)
+
+void *__curbrk = 0;
+extern int _end;
+
+int
+__brk (addr)
+     void *addr;
+{
+    int result = 0;
+
+  if (__curbrk == 0)
+    {
+#ifndef SHARED
+      /* If we are statically compiled we can use &_end.  */
+      addr = &_end;
+#else
+      if (GL(dl_ns)[LM_ID_BASE]._ns_loaded)
+        {
+          /* The dynamic executable has been mapped in.  */
+          addr = (void*)GL(dl_ns)[LM_ID_BASE]._ns_loaded->l_map_end;
+        }
+      else if (GL(dl_rtld_map).l_addr == 0)
+        {
+          /* This must be ld.so.1 being run directly.  */
+          addr = &_end;
+        }
+      else
+        {
+          /* The executable has not been mapped in.  */
+          return -1;
+        }
+#endif
+      }
+    else if (addr == 0)
+      {
+        /* We have multiple libc's.  */
+        return 0;
+    }
+
+    addr = BRK_ALIGN (addr);
+    result = INLINE_SYSCALL (brk, 1, addr);
+    if (result == 0)
+        __curbrk = addr;
+
+    return result;
+}
+
+weak_alias (__brk, brk)