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Add an example for testing the ELF loader
git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5260 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
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############################################################################
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# examples/elf/tests/longjmp/Makefile
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#
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# Copyright (C) 2012 Gregory Nutt. All rights reserved.
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# Author: Gregory Nutt <gnutt@nuttx.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# 3. Neither the name NuttX nor the names of its contributors may be
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# used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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############################################################################
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-include $(TOPDIR)/.config
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-include $(TOPDIR)/Make.defs
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BIN = longjmp
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SRCS = $(BIN).c
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OBJS = $(BIN:.c=.o)
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all: $(BIN)
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$(OBJS): %.o: %.c
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@echo "CC: $<"
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@$(CC) -c $(CFLAGS) $< -o $@
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$(BIN): $(OBJS)
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@echo "LD: $<"
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@$(LD) $(LDELFFLAGS) -o $@ $^
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clean:
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@rm -f $(BIN) *.o *~ .*.swp core
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install:
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@install -D $(BIN) $(ROMFS_DIR)/$(BIN)
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@@ -0,0 +1,128 @@
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/****************************************************************************
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* examples/elf/tests/longjmp/longjmp.c
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdio.h>
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#include <setjmp.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define MAIN_VAL 47
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#define FUNC_VAL 92
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#define LEAF_VAL 163
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#define FUNCTION_ARG MAIN_VAL
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#define LEAF_ARG (FUNCTION_ARG + FUNC_VAL)
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#define SETJMP_RETURN (LEAF_ARG + LEAF_VAL)
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static jmp_buf env;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static int leaf(int *some_arg)
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{
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int some_local_variable = *some_arg + LEAF_VAL;
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printf("leaf: received %d\n", *some_arg);
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if (*some_arg != LEAF_ARG)
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printf("leaf: ERROR: expected %d\n", LEAF_ARG);
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printf("leaf: Calling longjmp() with %d\n", some_local_variable);
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longjmp(env, some_local_variable);
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}
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static int function(int some_arg)
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{
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int some_local_variable = some_arg + FUNC_VAL;
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int retval;
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printf("function: received %d\n", some_arg);
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if (some_arg != FUNCTION_ARG)
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printf("function: ERROR: expected %d\n", FUNCTION_ARG);
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printf("function: Calling leaf() with %d\n", some_local_variable);
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retval = leaf(&some_local_variable);
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printf("function: ERROR -- leaf returned!\n");
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return retval;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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int main(int argc, char **argv)
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{
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int value;
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printf("main: Calling setjmp\n");
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value = setjmp(env);
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printf("main: setjmp returned %d\n", value);
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if (value == 0)
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{
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printf("main: Normal setjmp return\n");
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printf("main: Calling function with %d\n", MAIN_VAL);
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function(MAIN_VAL);
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printf("main: ERROR -- function returned!\n");
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return 1;
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}
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else if (value != SETJMP_RETURN)
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{
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printf("main: ERROR: Expected %d\n", SETJMP_RETURN);
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return 1;
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}
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else
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{
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printf("main: SUCCESS: setjmp return from longjmp call\n");
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return 0;
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}
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}
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