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xfa.h
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/*
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* Copyright (C) 2016 Kaspar Schleiser <kaspar@schleiser.de>
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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#ifndef XFA_H
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#define XFA_H
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#include <
inttypes.h
>
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#include "
compiler_hints.h
"
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/*
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* Unfortunately, current gcc trips over accessing XFA's because of their
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* zero-size start/end array that are used of symbol markers, with an "array
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* index out of bounds" warning. So until a solution for that is found, we
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* need to disable array bounds checks for files using XFAs.
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*/
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#ifndef DOXYGEN
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_Pragma(
"GCC diagnostic ignored \"-Warray-bounds\""
)
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#endif
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#define _XFA(type, name, prio) \
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NO_SANITIZE_ARRAY \
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__attribute__((used, section(".xfa." #name "." #prio))) _Alignas(type) type
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#define _XFA_CONST(type, name, prio) \
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NO_SANITIZE_ARRAY \
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__attribute__((used, section(".roxfa." #name "." #prio))) _Alignas(type) type
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#define XFA_INIT_CONST(type, name) \
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_Pragma("GCC diagnostic push") \
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_Pragma("GCC diagnostic ignored \"-Wpedantic\"") \
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_XFA_CONST(type, name, 0_) name [0] = {}; \
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_XFA_CONST(type, name, 9_) name ## _end [0] = {}; \
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_Pragma("GCC diagnostic pop") \
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extern const unsigned __xfa_dummy
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#define XFA_INIT(type, name) \
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_Pragma("GCC diagnostic push") \
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_Pragma("GCC diagnostic ignored \"-Wpedantic\"") \
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_XFA(type, name, 0_) name [0] = {}; \
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_XFA(type, name, 9_) name ## _end [0] = {}; \
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_Pragma("GCC diagnostic pop") \
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extern const unsigned __xfa_dummy
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#define XFA_USE_CONST(type, name) \
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XFA_USE(type, name)
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#define XFA_USE(type, name) \
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extern type name []; \
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extern type name ## _end []
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#define XFA(type, xfa_name, prio) _XFA(type, xfa_name, 5_ ## prio)
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#define XFA_CONST(type, xfa_name, prio) _XFA_CONST(type, xfa_name, 5_ ## prio)
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#define XFA_ADD_PTR(xfa_name, prio, name, entry) \
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_XFA_CONST(__typeof__(entry), xfa_name, 5_ ## prio) \
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xfa_name ## _ ## prio ## _ ## name = entry
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#define XFA_LEN(type, \
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name) (((uintptr_t)name ## _end - (uintptr_t)name) / \
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sizeof(type))
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#ifdef __cplusplus
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extern
"C"
{
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#endif
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/* making externc happy */
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#ifdef __cplusplus
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}
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#endif
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#endif
/* XFA_H */
compiler_hints.h
Common macros and compiler attributes/pragmas configuration.
inttypes.h
Adds include for missing inttype definitions.
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