9f628943a8
The toolchain headers included an abstraction for defining symbol names in assembly context in the situation where we're using a DOS-style assembler that automatically prepends an underscore to symbol names. We aren't. Zephyr is an ELF platform. None of our toolchains do this. Nothing sets the "TOOL_PREPENDS_UNDERSCORE" macro from within the project, and it surely isn't an industry standard. Yank it out. Now we can write assembler labels in natural syntax, and a few other things fall out to simplify too. (NOTE: these headers contain assembly code and will fail checkpatch. That is an expected false positive.) Change-Id: Ic89e74422b52fe50b3b7306a0347d7a560259581 Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/*
|
|
* Copyright (c) 2010-2014 Wind River Systems, Inc.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* @brief Common toolchain abstraction
|
|
*
|
|
* Macros to abstract compiler capabilities (common to all toolchains).
|
|
*/
|
|
|
|
/* Abstract use of extern keyword for compatibility between C and C++ */
|
|
#ifdef __cplusplus
|
|
#define EXTERN_C extern "C"
|
|
#else
|
|
#define EXTERN_C extern
|
|
#endif
|
|
|
|
/* Use TASK_ENTRY_CPP to tag task entry points defined in C++ files. */
|
|
|
|
#ifdef __cplusplus
|
|
#define TASK_ENTRY_CPP extern "C"
|
|
#endif
|
|
|
|
/*
|
|
* Generate a reference to an external symbol.
|
|
* The reference indicates to the linker that the symbol is required
|
|
* by the module containing the reference and should be included
|
|
* in the image if the module is in the image.
|
|
*
|
|
* The assembler directive ".set" is used to define a local symbol.
|
|
* No memory is allocated, and the local symbol does not appear in
|
|
* the symbol table.
|
|
*/
|
|
|
|
#ifdef _ASMLANGUAGE
|
|
#define REQUIRES(sym) .set sym ## _Requires, sym
|
|
#else
|
|
#define REQUIRES(sym) __asm__ (".set " # sym "_Requires, " # sym "\n\t");
|
|
#endif
|
|
|
|
#ifdef _ASMLANGUAGE
|
|
#define SECTION .section
|
|
#endif
|
|
|
|
/*
|
|
* If the project is being built for speed (i.e. not for minimum size) then
|
|
* align functions and branches in executable sections to improve performance.
|
|
*/
|
|
|
|
#ifdef _ASMLANGUAGE
|
|
|
|
#ifdef CONFIG_X86
|
|
|
|
#ifdef PERF_OPT
|
|
#define PERFOPT_ALIGN .balign 16
|
|
#else
|
|
#define PERFOPT_ALIGN .balign 1
|
|
#endif
|
|
|
|
#elif defined(CONFIG_ARM)
|
|
|
|
#ifdef CONFIG_ISA_THUMB
|
|
#define PERFOPT_ALIGN .balign 2
|
|
#else
|
|
#define PERFOPT_ALIGN .balign 4
|
|
#endif
|
|
|
|
#elif defined(CONFIG_ARC)
|
|
|
|
#define PERFOPT_ALIGN .balign 4
|
|
|
|
#elif defined(CONFIG_NIOS2)
|
|
|
|
#define PERFOPT_ALIGN .balign 4
|
|
|
|
#else
|
|
|
|
#error Architecture unsupported
|
|
|
|
#endif
|
|
|
|
#define GC_SECTION(sym) SECTION .text.##sym, "ax"
|
|
|
|
#endif /* _ASMLANGUAGE */
|
|
|
|
/* force inlining a function */
|
|
|
|
#if !defined(_ASMLANGUAGE)
|
|
#define ALWAYS_INLINE inline __attribute__((always_inline))
|
|
#endif
|
|
|
|
#define _STRINGIFY(x) #x
|
|
#define STRINGIFY(s) _STRINGIFY(s)
|
|
|
|
/* Indicate that an array will be used for stack space. */
|
|
|
|
#define __stack __aligned(STACK_ALIGN)
|
|
|
|
/* concatenate the values of the arguments into one */
|
|
#define _DO_CONCAT(x, y) x ## y
|
|
#define _CONCAT(x, y) _DO_CONCAT(x, y)
|