78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
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/*
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* Copyright (c) 2011 Aeroflex Gaisler
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*
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* BSD license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef _SYS_STACK_H_
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#define _SYS_STACK_H_
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#if !defined(_ASM)
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#include <sys/types.h>
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#endif
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/*
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* A stack frame looks like:
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*
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* %fp->| |
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* |-------------------------------|
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* | Locals, temps, saved floats |
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* |-------------------------------|
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* | outgoing parameters past 6 |
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* |-------------------------------|-\
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* | 6 words for callee to dump | |
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* | register arguments | |
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* |-------------------------------| > minimum stack frame
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* | One word struct-ret address | |
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* |-------------------------------| |
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* | 16 words to save IN and | |
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* %sp->| LOCAL register on overflow | |
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* |-------------------------------|-/
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*/
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/*
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* Constants defining a 32-bit stack frame.
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*/
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#define WINDOWSIZE (16*4) /* size of window save area */
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#define ARGPUSHSIZE (6*4) /* size of arg dump area */
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#define ARGPUSH (WINDOWSIZE + 4) /* arg dump area offset */
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#define MINFRAME (WINDOWSIZE + ARGPUSHSIZE + 4) /* min frame */
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#define STACK_GROWTH_DOWN /* stacks grow from high to low addresses */
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/*
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* Stack alignment macros.
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*/
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#define STACK_ALIGN 8
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#define SA(X) (((X)+(STACK_ALIGN-1)) & ~(STACK_ALIGN-1))
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_STACK_H */
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