82 lines
2.9 KiB
C
82 lines
2.9 KiB
C
/*
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* Copyright (c) 2006, Swedish Institute of Computer Science.
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* All rights reserved.
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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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* 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 the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be 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 INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: level5.c,v 1.4 2008/11/20 16:22:28 fros4943 Exp $
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*/
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#include <jni.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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long ref_var; /* Placed somewhere in the BSS section */
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int initialized_counter=1; /* Variable in data section */
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int uninitialized_counter; /* Variable in BSS section */
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JNIEXPORT void JNICALL
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Java_Level5_setReferenceAddress(JNIEnv *env, jobject obj, jint addr)
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{
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/*printf("relative reference address is %p\n", addr);*/
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/*printf("absolute reference address is %p\n", &ref_var);*/
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ref_var = (((long)&ref_var) - ((long)addr));
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printf("Offset is 0x%p\n", ref_var);
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fflush(stdout);
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}
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JNIEXPORT void JNICALL
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Java_Level5_doCount(JNIEnv *env, jobject obj)
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{
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printf(">> DATA_counter=\t%i\tBSS_counter=\t%i\n", ++initialized_counter, ++uninitialized_counter);
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fflush(stdout);
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}
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JNIEXPORT void JNICALL
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Java_Level5_getMemory(JNIEnv *env, jobject obj, jint rel_addr, jint length, jbyteArray mem_arr)
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{
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(*env)->SetByteArrayRegion(
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env,
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mem_arr,
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0,
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(size_t) length,
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(jbyte *) (((long)rel_addr) + ref_var)
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);
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}
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JNIEXPORT void JNICALL
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Java_Level5_setMemory(JNIEnv *env, jobject obj, jint rel_addr, jint length, jbyteArray mem_arr)
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{
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jbyte *mem = (*env)->GetByteArrayElements(env, mem_arr, 0);
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memcpy(
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(char*) (((long)rel_addr) + ref_var),
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mem,
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length);
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(*env)->ReleaseByteArrayElements(env, mem_arr, mem, 0);
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}
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