Intel MPX support for mmap and mremap wrappers of syscalls for x86_32 and x86_64.

Create bounds.
Use C wrapper of syscall instead of assembler wrapper for x86_64.

diff --git a/sysdeps/unix/sysv/linux/i386/Makefile b/sysdeps/unix/sysv/linux/i386/Makefile
index acc30219e8dc965f61fadfa6fa1bae349b91724e..f38f4b2866232f87b6525439fdba5dd93eca588e 100644 (file)
--- a/sysdeps/unix/sysv/linux/i386/Makefile
+++ b/sysdeps/unix/sysv/linux/i386/Makefile
@@ -2,7 +2,7 @@
 default-abi := 32
 
 ifeq ($(subdir),misc)
-sysdep_routines += ioperm iopl vm86 call_pselect6 call_fallocate
+sysdep_routines += ioperm iopl vm86 call_pselect6 call_fallocate mremap
 endif
 
 ifeq ($(subdir),elf)

diff --git a/sysdeps/unix/sysv/linux/i386/mmap.S b/sysdeps/unix/sysv/linux/i386/mmap.S
index 0addf65e444ae2ed3e251ff6706f90ad533b0f2f..6877641a1cfadf565b1d955403a1382a40af5fb9 100644 (file)
--- a/sysdeps/unix/sysv/linux/i386/mmap.S
+++ b/sysdeps/unix/sysv/linux/i386/mmap.S
@@ -74,6 +74,11 @@ L(skip):
        ja SYSCALL_ERROR_LABEL
 
        /* Successful; return the syscall's value.  */
+       mov 8(%esp), %ecx
+#if defined  __CHKP__ || defined __CHKWR__
+       bndmk -1(%eax, %ecx), %bnd0
+#endif
+
        ret
 
 PSEUDO_END (__mmap)

diff --git a/sysdeps/unix/sysv/linux/i386/mmap64.S b/sysdeps/unix/sysv/linux/i386/mmap64.S
index 31a0f67827daf7aadf02ee44c5b697a098cf4b82..fd3b9ec925cf3255b1b25030d52044f17df2caa8 100644 (file)
--- a/sysdeps/unix/sysv/linux/i386/mmap64.S
+++ b/sysdeps/unix/sysv/linux/i386/mmap64.S
@@ -89,6 +89,10 @@ L(do_syscall):
        ja SYSCALL_ERROR_LABEL
 
        /* Successful; return the syscall's value.  */
+       mov 8(%esp), %ecx
+#if defined  __CHKP__ || defined __CHKWR__
+       bndmk -1(%eax, %ecx), %bnd0
+#endif
        ret
 
        cfi_adjust_cfa_offset (16)

diff --git a/sysdeps/unix/sysv/linux/i386/mremap.c b/sysdeps/unix/sysv/linux/i386/mremap.c
new file mode 100644 (file)
index 0000000..ad55d9d
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/i386/mremap.c
@@ -0,0 +1,36 @@
+/* Copyright (C) 2013 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
+   <http://www.gnu.org/licenses/>.  */
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sysdeps/unix/sysv/linux/i386/sysdep.h>
+
+void *
+__mremap (void *old_address, size_t old_size, size_t new_size, int flags, ...)
+{
+  void *p = INLINE_SYSCALL (mremap, 4, old_address, old_size, new_size, flags);
+  if ((long) p == -1) return MAP_FAILED;
+#ifdef __CHKP__
+  return __bnd_set_ptr_bounds (p, new_size);
+#else
+  return p;
+#endif
+}
+
+weak_alias (__mremap, mremap)

diff --git a/sysdeps/unix/sysv/linux/x86_64/mmap.c b/sysdeps/unix/sysv/linux/x86_64/mmap.c
new file mode 100644 (file)
index 0000000..1ee6f96
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/x86_64/mmap.c
@@ -0,0 +1,52 @@
+/* Copyright (C) 2012 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
+   <http://www.gnu.org/licenses/>.  */
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sysdeps/unix/sysv/linux/x86_64/sysdep.h>
+
+void *
+__mmap (void *addr, size_t len, int prot, int flags, int fd, off_t offset)
+{
+  void *p = INLINE_SYSCALL (mmap, 6, addr, len, prot, flags, fd, offset);
+  if ((long) p == -1) return MAP_FAILED;
+#ifdef __CHKP__
+  return __bnd_set_ptr_bounds (p, len);
+#else
+  return p;
+#endif
+}
+
+weak_alias (__mmap, mmap64)
+weak_alias (__mmap, __mmap64)
+weak_alias (__mmap, mmap)
+
+void *
+__mremap (void *old_address, size_t old_size, size_t new_size, int flags, ...)
+{
+  void *p = INLINE_SYSCALL (mremap, 4, old_address, old_size, new_size, flags);
+  if ((long) p  == -1) return MAP_FAILED;
+#ifdef __CHKP__
+  return __bnd_set_ptr_bounds (p, new_size);
+#else
+  return p;
+#endif
+}
+
+weak_alias (__mremap, mremap)

diff --git a/sysdeps/unix/sysv/linux/x86_64/mmap64.c b/sysdeps/unix/sysv/linux/x86_64/mmap64.c
new file mode 100644 (file)
index 0000000..e69de29

diff --git a/sysdeps/unix/sysv/linux/x86_64/mremap.c b/sysdeps/unix/sysv/linux/x86_64/mremap.c
new file mode 100644 (file)
index 0000000..e69de29