X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fmmap-sbrk.c;h=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391;hb=51b80b0072e928c9163087e1fcbc71e52301f524;hp=fe9c07283ea47b147e500d59af039f5441482d87;hpb=1ab3bf1b148d31aad66735f52f9ff72af8769cd0;p=deliverable%2Fbinutils-gdb.git

diff --git a/gdb/mmap-sbrk.c b/gdb/mmap-sbrk.c
index fe9c07283e..e69de29bb2 100755
--- a/gdb/mmap-sbrk.c
+++ b/gdb/mmap-sbrk.c
@@ -1,145 +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 <stdio.h>
-#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 */