115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/*
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* Copyright (c) 2010-2014 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file
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* @brief Common toolchain abstraction
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*
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* Macros to abstract compiler capabilities (common to all toolchains).
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*/
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/* Abstract use of extern keyword for compatibility between C and C++ */
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#ifdef __cplusplus
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#define EXTERN_C extern "C"
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#else
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#define EXTERN_C extern
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#endif
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/* Use TASK_ENTRY_CPP to tag task entry points defined in C++ files. */
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#ifdef __cplusplus
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#define TASK_ENTRY_CPP extern "C"
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#endif
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/*
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* Generate a reference to an external symbol.
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* The reference indicates to the linker that the symbol is required
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* by the module containing the reference and should be included
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* in the image if the module is in the image.
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*
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* The assembler directive ".set" is used to define a local symbol.
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* No memory is allocated, and the local symbol does not appear in
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* the symbol table.
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*/
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#ifdef _ASMLANGUAGE
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#define REQUIRES(sym) .set sym ## _Requires, sym
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#else
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#define REQUIRES(sym) __asm__ (".set " # sym "_Requires, " # sym "\n\t");
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#endif
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#ifdef _ASMLANGUAGE
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#define SECTION .section
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#endif
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/*
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* If the project is being built for speed (i.e. not for minimum size) then
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* align functions and branches in executable sections to improve performance.
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*/
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#ifdef _ASMLANGUAGE
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#ifdef CONFIG_X86
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#ifdef PERF_OPT
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#define PERFOPT_ALIGN .balign 16
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#else
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#define PERFOPT_ALIGN .balign 1
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#endif
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#elif defined(CONFIG_ARM)
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#ifdef CONFIG_ISA_THUMB
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#define PERFOPT_ALIGN .balign 2
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#else
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#define PERFOPT_ALIGN .balign 4
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#endif
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#elif defined(CONFIG_ARC)
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#define PERFOPT_ALIGN .balign 4
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#elif defined(CONFIG_NIOS2)
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#define PERFOPT_ALIGN .balign 4
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#else
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#error Architecture unsupported
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#endif
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#define GC_SECTION(sym) SECTION .text.##sym, "ax"
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#endif /* _ASMLANGUAGE */
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/* force inlining a function */
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#if !defined(_ASMLANGUAGE)
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#define ALWAYS_INLINE inline __attribute__((always_inline))
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#endif
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#define _STRINGIFY(x) #x
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#define STRINGIFY(s) _STRINGIFY(s)
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/* Indicate that an array will be used for stack space. */
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#define __stack __aligned(STACK_ALIGN)
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/* concatenate the values of the arguments into one */
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#define _DO_CONCAT(x, y) x ## y
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#define _CONCAT(x, y) _DO_CONCAT(x, y)
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