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//=================================================================
//
// except1.cxx
//
// Exception test 1
//
//=================================================================
// ####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): dsm
// Contributors: dsm, jlarmour
// Date: 1999-02-16
// Description: Test basic exception functionality
//####DESCRIPTIONEND####
#include <pkgconf/kernel.h>
#include <cyg/infra/testcase.h>
#ifdef CYGPKG_KERNEL_EXCEPTIONS
#include <cyg/kernel/sched.hxx> // Cyg_Scheduler::start()
#include <cyg/kernel/thread.hxx> // Cyg_Thread
#include <cyg/kernel/intr.hxx> // cyg_VSR
#include <cyg/hal/hal_intr.h> // exception ranges
#include <cyg/kernel/sched.inl>
#include <cyg/kernel/thread.inl>
#define NTHREADS 1
#include "testaux.hxx"
#ifndef CYGPKG_HAL_ARM_PID
#define EXCEPTION_DATA_ACCESS
#endif
static int d0;
#ifdef EXCEPTION_DATA_ACCESS
static cyg_exception_handler handler0;
static void handler0(CYG_ADDRWORD data, cyg_code number, CYG_ADDRWORD info)
{
CYG_TEST_INFO("handler 0 called");
CYG_TEST_CHECK((CYG_ADDRWORD)123 == data, "handler given wrong data");
// ignore machine specific stuff
CYG_UNUSED_PARAM(cyg_code, number);
CYG_UNUSED_PARAM(CYG_ADDRWORD, info);
CYG_TEST_PASS_FINISH("Except 1 OK");
}
#endif
static void handler1(CYG_ADDRWORD data, cyg_code number, CYG_ADDRWORD info)
{
CYG_TEST_INFO("handler 1 called");
CYG_TEST_CHECK((CYG_ADDRWORD)&d0 == data, "handler given wrong data");
#ifdef CYGSEM_KERNEL_EXCEPTIONS_DECODE
CYG_TEST_CHECK(number == CYGNUM_HAL_EXCEPTION_MAX, "handler given wrong number");
#else
CYG_UNUSED_PARAM(cyg_code, number);
#endif
CYG_TEST_CHECK((CYG_ADDRWORD)99 == info, "handler given wrong info");
}
#ifdef EXCEPTION_DATA_ACCESS
// The following function attempts to cause an exception in various
// hacky ways. It is machine dependent what exception is generated.
// It does reads rather than writes hoping not to corrupt anything
// important.
static int
cause_fpe(int num)
{
double a;
a = 1.0/num; // Depending on FPU emulation and/or
// the FPU architecture, this may
// cause an exception.
// (float division by zero)
return ((int)a)/num; // This may cause an exception if
// the architecture supports it.
// (integer division by zero).
} // cause_fpe()
void cause_exception(void)
{
int x CYGBLD_ATTRIB_UNUSED;
unsigned int p=0;
// First try for an address exception (unaligned access exception
// or SEGV/BUS exceptions)
do {
x=*(volatile int *)(p-1);
p+=0x100000;
} while(p != 0);
// Next try an integer or floating point divide-by-zero exception.
cause_fpe(0);
}
#endif
static void entry0( CYG_ADDRWORD data )
{
#ifdef EXCEPTION_DATA_ACCESS
cyg_code n;
#endif
cyg_exception_handler *old_handler, *old_handler1;
CYG_ADDRWORD old_data, old_data1;
Cyg_Thread *p=Cyg_Thread::self();
CYG_UNUSED_PARAM(CYG_ADDRESS, data);
p->register_exception(
CYGNUM_HAL_EXCEPTION_MAX,
&handler1,
(CYG_ADDRWORD)&d0,
&old_handler,
&old_data);
p->register_exception(
CYGNUM_HAL_EXCEPTION_MAX,
&handler1,
(CYG_ADDRWORD)&d0,
&old_handler1,
&old_data1);
CYG_TEST_CHECK(old_handler1 == &handler1,
"register exception: old_handler not the one previously registered");
CYG_TEST_CHECK(old_data1 == (CYG_ADDRWORD)&d0,
"register exception: old_data not those previously registered");
p->deliver_exception(CYGNUM_HAL_EXCEPTION_MAX, (CYG_ADDRWORD)99);
CYG_TEST_INFO("handler 1 returned");
p->deregister_exception(CYGNUM_HAL_EXCEPTION_MAX);
p->deregister_exception(CYGNUM_HAL_EXCEPTION_MAX);
#ifdef EXCEPTION_DATA_ACCESS
#if 0
#elif defined(CYGPKG_HAL_POWERPC_SIM)
// The exception generated by the SIM is not recognized by GDB.
// PR 19945 workaround.
CYG_TEST_NA("Not applicable to PowerPC SIM");
#endif
for(n = CYGNUM_HAL_EXCEPTION_MIN; n <= CYGNUM_HAL_EXCEPTION_MAX; n++) {
p->register_exception(
n,
handler0,
(CYG_ADDRWORD)123,
&old_handler1,
&old_data1);
}
CYG_TEST_PASS("Attempting to provoke exception");
cause_exception();
CYG_TEST_FAIL_FINISH("Couldn't cause exception");
#else // EXCEPTION_DATA_ACCESS
CYG_TEST_NA("Platform does not support data exceptions");
#endif
}
#ifdef CYG_HAL_MIPS_TX39_JMR3904
externC cyg_VSR __default_exception_vsr;
cyg_VSR *old_vsr;
#endif
void except0_main( void )
{
// Use CYG_TEST_GDBCMD _before_ CYG_TEST_INIT()
CYG_TEST_GDBCMD("handle SIGBUS nostop");
CYG_TEST_GDBCMD("handle SIGSEGV nostop");
CYG_TEST_GDBCMD("handle SIGFPE nostop");
CYG_TEST_INIT();
#ifdef HAL_VSR_SET_TO_ECOS_HANDLER
// Reclaim the VSR off CygMon possibly
#ifdef CYGNUM_HAL_EXCEPTION_DATA_ACCESS
HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_ACCESS, NULL );
#endif
#ifdef CYGNUM_HAL_EXCEPTION_DATA_TLBMISS_ACCESS
HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_TLBMISS_ACCESS, NULL );
#endif
#ifdef CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_ACCESS
HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DATA_UNALIGNED_ACCESS, NULL );
#endif
#ifdef CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION
HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_ILLEGAL_INSTRUCTION, NULL );
#endif
#ifdef CYGNUM_HAL_EXCEPTION_DIV_BY_ZERO
HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_DIV_BY_ZERO, NULL );
#endif
#ifdef CYGNUM_HAL_EXCEPTION_FPU
HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_FPU, NULL );
#endif
#ifdef CYGNUM_HAL_EXCEPTION_FPU_DIV_BY_ZERO
HAL_VSR_SET_TO_ECOS_HANDLER( CYGNUM_HAL_EXCEPTION_FPU_DIV_BY_ZERO, NULL );
#endif
#endif
new_thread(entry0, 0);
Cyg_Scheduler::start();
CYG_TEST_FAIL_FINISH("Not reached");
}
externC void
cyg_start( void )
{
#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
cyg_hal_invoke_constructors();
#endif
except0_main();
}
#else // def CYGPKG_KERNEL_EXCEPTIONS
externC void
cyg_start( void )
{
CYG_TEST_INIT();
CYG_TEST_NA("Exceptions disabled");
}
#endif // def CYGPKG_KERNEL_EXCEPTIONS
// EOF except1.cxx
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