mirror of
https://github.com/marqs85/ossc
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127 lines
4.1 KiB
C
127 lines
4.1 KiB
C
/******************************************************************************
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* *
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* License Agreement *
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* *
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* Copyright (c) 2004 Altera Corporation, San Jose, California, USA. *
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* All rights reserved. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the "Software"), *
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* to deal in the Software without restriction, including without limitation *
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
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* and/or sell copies of the Software, and to permit persons to whom the *
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* Software is 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 THE *
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* 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 *
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
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* DEALINGS IN THE SOFTWARE. *
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* *
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* This agreement shall be governed in all respects by the laws of the State *
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* of California and by the laws of the United States of America. *
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* *
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******************************************************************************/
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#ifndef __ALT_STACK_H__
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#define __ALT_STACK_H__
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/*
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* alt_stack.h is the nios2 specific implementation of functions used by the
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* stack overflow code.
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*/
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#include "nios2.h"
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#include "alt_types.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif /* __cplusplus */
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extern char * alt_stack_limit_value;
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#ifdef ALT_EXCEPTION_STACK
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extern char __alt_exception_stack_pointer[]; /* set by the linker */
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#endif /* ALT_EXCEPTION_STACK */
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/*
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* alt_stack_limit can be called to determine the current value of the stack
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* limit register.
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*/
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static ALT_INLINE char * ALT_ALWAYS_INLINE alt_stack_limit (void)
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{
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char * limit;
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NIOS2_READ_ET(limit);
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return limit;
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}
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/*
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* alt_stack_pointer can be called to determine the current value of the stack
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* pointer register.
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*/
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static ALT_INLINE char * ALT_ALWAYS_INLINE alt_stack_pointer (void)
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{
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char * pointer;
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NIOS2_READ_SP(pointer);
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return pointer;
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}
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#ifdef ALT_EXCEPTION_STACK
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/*
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* alt_exception_stack_pointer returns the normal stack pointer from
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* where it is stored on the exception stack (uppermost 4 bytes). This
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* is really only useful during exception processing, and is only
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* available if a separate exception stack has been configured.
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*/
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static ALT_INLINE char * ALT_ALWAYS_INLINE alt_exception_stack_pointer (void)
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{
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return (char *) *(alt_u32 *)(__alt_exception_stack_pointer - sizeof(alt_u32));
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}
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#endif /* ALT_EXCEPTION_STACK */
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/*
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* alt_set_stack_limit can be called to update the current value of the stack
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* limit register.
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*/
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static ALT_INLINE void ALT_ALWAYS_INLINE alt_set_stack_limit (char * limit)
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{
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alt_stack_limit_value = limit;
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NIOS2_WRITE_ET(limit);
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}
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/*
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* alt_report_stack_overflow reports that a stack overflow happened.
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*/
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static ALT_INLINE void ALT_ALWAYS_INLINE alt_report_stack_overflow (void)
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{
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NIOS2_REPORT_STACK_OVERFLOW();
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}
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __ALT_STACK_H__ */
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