134 lines
3.9 KiB
C
134 lines
3.9 KiB
C
/* toolchain/common.h - common toolchain abstraction */
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/*
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* Copyright (c) 2010-2014 Wind River Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Wind River Systems nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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DESCRIPTION
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Macros to abstract compiler capabilities (common to all toolchains).
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\NOMANUAL
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*/
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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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* The following definitions are used for symbol name compatibility.
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*
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* When #if 1, sources are assembled assuming the compiler
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* you are using does not generate global symbols prefixed by "_".
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* (e.g. elf/dwarf)
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*
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* When #if 0, sources are assembled assuming the compiler
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* you are using generates global symbols prefixed by "_".
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* (e.g. coff/stabs)
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*/
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#ifdef _ASMLANGUAGE
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#ifndef TOOL_PREPENDS_UNDERSCORE
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#define FUNC(sym) sym
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#else
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#define FUNC(sym) _##sym
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#endif
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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_32
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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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#endif
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#define GC_SECTION(sym) SECTION .text.FUNC(sym), "ax"
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#define BRANCH_LABEL(sym) FUNC(sym):
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#define VAR(sym) FUNC(sym)
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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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/* Indicate that an array will be used for stack space. */
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#define __stack __aligned(STACK_ALIGN)
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#ifdef CONFIG_UNALIGNED_WRITE_UNSUPPORTED
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extern void _Unaligned32Write(unsigned int *ptr, unsigned int val);
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extern unsigned _Unaligned32Read(unsigned int *ptr);
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#endif /* CONFIG_UNALIGNED_WRITE_UNSUPPORTED */
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