Subversion Repositories openrisc

//===========================================================================
//
//      longjmp.cxx
//
//      ISO C standard longjmp() function
//
//===========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####                                            
// -------------------------------------------                              
// This file is part of eCos, the Embedded Configurable Operating System.   
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under    
// the terms of the GNU General Public License as published by the Free     
// Software Foundation; either version 2 or (at your option) any later      
// version.                                                                 
//
// eCos is distributed in the hope that it will be useful, but WITHOUT      
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or    
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    
// for more details.                                                        
//
// You should have received a copy of the GNU General Public License        
// along with eCos; if not, write to the Free Software Foundation, Inc.,    
// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.            
//
// As a special exception, if other files instantiate templates or use      
// macros or inline functions from this file, or you compile this file      
// and link it with other works to produce a work based on this file,       
// this file does not by itself cause the resulting work to be covered by   
// the GNU General Public License. However the source code for this file    
// must still be made available in accordance with section (3) of the GNU   
// General Public License v2.                                               
//
// This exception does not invalidate any other reasons why a work based    
// on this file might be covered by the GNU General Public License.         
// -------------------------------------------                              
// ####ECOSGPLCOPYRIGHTEND####                                              
//===========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    jlarmour
// Contributors: 
// Date:         2000-04-30
// Purpose:     
// Description:  Implements ISO standard non-local jump function longjmp()
//               per ISO C para 7.6.2.1. This is the "real" alternative to
//               the inline version of longjmp()
//             
// Usage:       
//
//####DESCRIPTIONEND####
//
//===========================================================================
 
// CONFIGURATION
 
#include <pkgconf/libc_setjmp.h>   // Configuration header
 
// INCLUDES
 
#include <cyg/infra/cyg_type.h>    // Common type definitions and support
#include <cyg/infra/cyg_trac.h>    // Common tracing code
#include <cyg/infra/cyg_ass.h>     // Common assertion code
#include <cyg/hal/hal_arch.h>      // HAL architecture specific implementation
 
// We don't want the inline version of longjmp() defined here
#ifdef CYGIMP_LIBC_SETJMP_INLINES
# undef CYGIMP_LIBC_SETJMP_INLINES
#endif
 
#include <setjmp.h>                // Header for setjmp/longjmp
 
 
// FUNCTIONS
 
void
longjmp( jmp_buf cyg_buf, int cyg_val)
{
    CYG_REPORT_FUNCNAME( "longjmp" );
    CYG_REPORT_FUNCARG2( "&cyg_buf=%08x, cyg_val=%d", &cyg_buf, cyg_val );
 
    // ANSI says that if we are passed cyg_val==0, then we change it to 1
    if (cyg_val == 0)
        ++cyg_val;
 
    // we let the HAL do the work
 
    HAL_REORDER_BARRIER(); // prevent any chance of optimisation re-ordering
    hal_longjmp( cyg_buf, cyg_val );
    HAL_REORDER_BARRIER(); // prevent any chance of optimisation re-ordering
 
#ifdef CYGDBG_USE_ASSERTS
    CYG_ASSERT( 0, "longjmp should not have reached this point!" );
#else
    for (;;)
        CYG_EMPTY_STATEMENT;
#endif
} // longjmp()
 
// EOF longjmp.cxx