* command.c (shell_escape, make_command, _initialze_command):

[deliverable/binutils-gdb.git] / gdb / mmap-sbrk.c

diff --git a/gdb/mmap-sbrk.c b/gdb/mmap-sbrk.c
index 262284553d8c5f639d9e3c778245ca17b21ba7a7..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 100755 (executable)
--- a/gdb/mmap-sbrk.c
+++ b/gdb/mmap-sbrk.c
@@ -1,144 +0,0 @@
-/* GDB support for an sbrk-like function that uses mmap.
-   Copyright 1992 Free Software Foundation, Inc.
-   Contributed by Cygnus Support, using pieces from other GDB modules.
-
-This file is part of GDB.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program 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 General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
-
-#include "defs.h"
-
-#ifdef HAVE_MMAP
-
-#include <fcntl.h>
-#include <sys/mman.h>
-
-#ifdef i386
-#define MMAP_BASE ((caddr_t) 0x81000000)
-#define MMAP_PGSZ 0x00002000  /* Must be multiple of real page size */
-#else
-#define MMAP_BASE ((caddr_t) 0xC2000000)
-#define MMAP_PGSZ 0x00002000  /* Must be multiple of real page size */
-#endif
-
-#define PAGE_ALIGN(addr) (caddr_t) (((long)(addr) + MMAP_PGSZ - 1) & \
-                                   ~(MMAP_PGSZ - 1))
-
-static caddr_t mbase = MMAP_BASE;      /* Current base of mmap'd region */
-static caddr_t mbreak = MMAP_BASE;     /* Current "break" address */
-static caddr_t mtop = MMAP_BASE;       /* Current top of mmap'd region */
-
-static int fd = -1;                    /* Open fd for /dev/zero */
-
-
-/*  Provide a utility routine for other modules to obtain compatible
-    page alignment. */
-
-PTR
-mmap_page_align (addr)
-     PTR addr;
-{
-  return (PAGE_ALIGN (addr));
-}
-
-/*  Return the base address of the start of the mmap'd region.  Note that
-    we can find the end of the region at anytime by calling mmap_sbrk(0) */
-
-PTR
-mmap_base ()
-{
-  return (mbase);
-}
-
-/*  Works like sbrk(), but uses mmap to add to or subtract from a
-    memory region. */
-
-PTR
-mmap_sbrk (size)
-     int size;
-{
-  PTR result = NULL;
-  int minc;
-  caddr_t moveto;
-
-  if (size == 0)
-    {
-      /* Just return the current "break" value. */
-      result = mbreak;
-    }
-  else if (size < 0)
-    {
-      /* We are deallocating memory.  If the amount requested would cause
-        us to try to deallocate back past the base of the mmap'd region
-        then do nothing, and return NULL.  Otherwise, deallocate the
-        memory and return the old break value. */
-      if (mbreak + size >= mbase)
-       {
-         result = (PTR) mbreak;
-         mbreak += size;
-         moveto = PAGE_ALIGN (mbreak);
-         munmap (moveto, (size_t) (mtop - moveto));
-         mtop = moveto;
-       }
-    }
-  else
-    {
-      /* We are allocating memory.  Make sure we have an open file
-        descriptor and then go on to get the memory. */
-      if ((fd == -1) && (fd = open ("/dev/zero", O_RDONLY)) < 0)
-       {
-         result = NULL;
-       }
-      else if (mbreak + size > mtop)
-       {
-         /* The request would move us past the end of the currently
-            mapped memory, so map in enough more memory to satisfy
-            the request. */
-         moveto = PAGE_ALIGN (mbreak + size);
-         if (mmap (mtop, moveto - mtop, PROT_READ | PROT_WRITE,
-                   MAP_PRIVATE | MAP_FIXED, fd, 0) == mtop)
-           {
-             mtop = moveto;
-             result = (PTR) mbreak;
-             mbreak += size;
-           }
-       }
-      else
-       {
-         result = (PTR) mbreak;
-         mbreak += size;
-       }
-    }
-  return (result);
-}
-
-PTR
-mmap_remap (base, mapsize, fd, foffset)
-     PTR base;
-     long mapsize;
-     int fd;
-     long foffset;
-{
-  /* FIXME:  Quick hack, needs error checking and other attention. */
-  munmap (mbase, (size_t) (mtop - mbase));
-  mbase = base;
-  mtop = mbase + mapsize;
-  base = mmap (base, mapsize, PROT_READ | PROT_WRITE,
-              MAP_PRIVATE | MAP_FIXED, dup (fd), foffset);
-  return (base);
-}
-
-
-#endif /* HAVE_MMAP */