From cae87e64dca14f50da7bbd99085c7f5e413ad0f8 Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Mon, 13 Nov 2017 17:55:12 +0100 Subject: support: Add Based on the implementation in resolv/tst-inet_pton.c. --- support/next_to_fault.h | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 support/next_to_fault.h (limited to 'support/next_to_fault.h') diff --git a/support/next_to_fault.h b/support/next_to_fault.h new file mode 100644 index 0000000000..dd71c28ac0 --- /dev/null +++ b/support/next_to_fault.h @@ -0,0 +1,48 @@ +/* Memory allocation next to an unmapped page. + Copyright (C) 2017 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 + . */ + +#ifndef SUPPORT_NEXT_TO_FAULT_H +#define SUPPORT_NEXT_TO_FAULT_H + +#include +#include + +__BEGIN_DECLS + +/* The memory region created by next_to_fault_allocate. */ +struct support_next_to_fault +{ + /* The user data. */ + char *buffer; + size_t length; + + /* The entire allocated region. */ + void *region_start; + size_t region_size; +}; + +/* Allocate a buffer of SIZE bytes just before a page which is mapped + with PROT_NONE (so that overrunning the buffer will cause a + fault). */ +struct support_next_to_fault support_next_to_fault_allocate (size_t size); + +/* Deallocate the memory region allocated by + next_to_fault_allocate. */ +void support_next_to_fault_free (struct support_next_to_fault *); + +#endif /* SUPPORT_NEXT_TO_FAULT_H */ -- cgit v1.2.3