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/*================================================================= // // kexcept1.cxx // // Kernel C API Exception test 1 // //================================================================= //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, 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., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 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. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //================================================================= //#####DESCRIPTIONBEGIN#### // // Author(s): dsm // Contributors: dsm, jlarmour // Date: 1999-02-16 // Description: Test basic exception functionality //####DESCRIPTIONEND#### */ #include <cyg/hal/hal_arch.h> // CYGNUM_HAL_STACK_SIZE_TYPICAL #include <cyg/kernel/kapi.h> #include <cyg/infra/testcase.h> #ifdef CYGPKG_KERNEL_EXCEPTIONS #ifdef CYGFUN_KERNEL_API_C #include <cyg/hal/hal_intr.h> // exception ranges #include "testaux.h" #ifndef CYGPKG_HAL_ARM_PID #define EXCEPTION_DATA_ACCESS #endif #define NTHREADS 1 #define STACKSIZE CYGNUM_HAL_STACK_SIZE_TYPICAL static cyg_handle_t thread[NTHREADS]; static cyg_thread thread_obj[NTHREADS]; static char stack[NTHREADS][STACKSIZE]; #ifdef EXCEPTION_DATA_ACCESS static cyg_exception_handler_t handler0; static void handler0(cyg_addrword_t data, cyg_code_t number, cyg_addrword_t info) { CYG_TEST_INFO("handler 0 called"); CYG_TEST_CHECK((cyg_addrword_t)123 == data, "handler given wrong data"); // ignore machine specific stuff CYG_UNUSED_PARAM(cyg_code_t, number); CYG_UNUSED_PARAM(cyg_addrword_t, info); CYG_TEST_PASS_FINISH("Except 1 OK"); } #endif static int d0; static void handler1(cyg_addrword_t data, cyg_code_t number, cyg_addrword_t info) { CYG_TEST_INFO("handler 1 called"); CYG_TEST_CHECK((cyg_addrword_t)&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_t, number); #endif CYG_TEST_CHECK((cyg_addrword_t)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; 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_t n; #endif cyg_exception_handler_t *old_handler, *old_handler1; cyg_addrword_t old_data, old_data1; CYG_UNUSED_PARAM(CYG_ADDRESS, data); cyg_exception_set_handler( CYGNUM_HAL_EXCEPTION_MAX, &handler1, (cyg_addrword_t)&d0, &old_handler, &old_data); cyg_exception_set_handler( CYGNUM_HAL_EXCEPTION_MAX, &handler1, (cyg_addrword_t)&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_t)&d0, "register exception: old_data not those previously registered"); cyg_exception_call_handler( cyg_thread_self(), CYGNUM_HAL_EXCEPTION_MAX, (cyg_addrword_t)99); CYG_TEST_INFO("handler 1 returned"); cyg_exception_clear_handler(CYGNUM_HAL_EXCEPTION_MAX); cyg_exception_clear_handler(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++) { cyg_exception_set_handler( n, handler0, (cyg_addrword_t)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 extern void __default_exception_vsr(void); #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 cyg_thread_create(4, entry0 , (cyg_addrword_t)0, "kexcept1", (void *)stack[0], STACKSIZE, &thread[0], &thread_obj[0]); cyg_thread_resume(thread[0]); cyg_scheduler_start(); CYG_TEST_FAIL_FINISH("Not reached"); } externC void cyg_start( void ) { except0_main(); } #else // def CYGFUN_KERNEL_API_C #define N_A_MSG "Kernel C API layer disabled" #endif // def CYGFUN_KERNEL_API_C #else // def CYGPKG_KERNEL_EXCEPTIONS #define N_A_MSG "Exceptions disabled" #endif // def CYGPKG_KERNEL_EXCEPTIONS #ifdef N_A_MSG externC void cyg_start( void ) { CYG_TEST_INIT(); CYG_TEST_NA( N_A_MSG); } #endif // N_A_MSG /* EOF kexcept1.c */
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