http://www.lambda.ee/w/index.php?action=history&feed=atom&title=Stack_Exploration_%28ITI8510%29 2026-11-07T00:49:22Z Selle lehekülje redigeerimiste ajalugu MediaWiki 1.43.11 http://www.lambda.ee/w/index.php?title=Stack_Exploration_(ITI8510)&diff=12639&oldid=prev 2015-09-16T09:42:21Z

<p><span class="autocomment">Task</span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 16. september 2015, kell 11:42</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l17">17. rida:</td> <td colspan="2" class="diff-lineno">17. rida:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you print the string from main()? Is it located in the stack?</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you print the string from main()? Is it located in the stack?</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>   // note that there is a difference between the lines:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>   // note that there is a difference between the lines:</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>   char s[] = "foo:asdasdasd"; // <del style="font-weight: bold; text-decoration: none;">foo </del>is allocated on the stack</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>   char s[] = "foo:asdasdasd"; // is allocated on the stack</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>   char *s = "bar:dsadsadas";  // <del style="font-weight: bold; text-decoration: none;">foo </del>is not allocated on the stack</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>   char *s = "bar:dsadsadas";  // is not allocated on the stack</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Comment some of the lines which print the addresses of variables in main() (from task 1), check that your program does not use them -- can you still print them by using an address from foo()?</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Comment some of the lines which print the addresses of variables in main() (from task 1), check that your program does not use them -- can you still print them by using an address from foo()?</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Put the variables back to the stack. Write a function which tries to print out all the stack (4 bytes per line using printf() with &quot;%08x\n&quot;. The program should crash at some point with a segmentation fault; this is the expected and desired result of the task and should be valued!</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Put the variables back to the stack. Write a function which tries to print out all the stack (4 bytes per line using printf() with &quot;%08x\n&quot;. The program should crash at some point with a segmentation fault; this is the expected and desired result of the task and should be valued!</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>: Note: For your convenience print the memory location address, then its contents as decimal, hexadecimal, and char.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>: Note: For your convenience print the memory location address, then its contents as decimal, hexadecimal, and char.</div></td></tr> <!-- diff cache key lambdadb:diff:1.41:old-12638:rev-12639:php=table --> </table>

Irve http://www.lambda.ee/w/index.php?title=Stack_Exploration_(ITI8510)&diff=12638&oldid=prev 2015-09-16T09:41:52Z

<p><span class="autocomment">Task</span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 16. september 2015, kell 11:41</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l17">17. rida:</td> <td colspan="2" class="diff-lineno">17. rida:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you print the string from main()? Is it located in the stack?</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you print the string from main()? Is it located in the stack?</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>   // note that there is a difference between the lines:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>   // note that there is a difference between the lines:</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>   char s[] = "foo"; // foo is allocated on the stack</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>   char s[] = "foo<ins style="font-weight: bold; text-decoration: none;">:asdasdasd</ins>"; // foo is allocated on the stack</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>   char *s = "<del style="font-weight: bold; text-decoration: none;">foo</del>";  // foo is not allocated on the stack</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>   char *s = "<ins style="font-weight: bold; text-decoration: none;">bar:dsadsadas</ins>";  // foo is not allocated on the stack</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Comment some of the lines which print the addresses of variables in main() (from task 1), check that your program does not use them -- can you still print them by using an address from foo()?</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Comment some of the lines which print the addresses of variables in main() (from task 1), check that your program does not use them -- can you still print them by using an address from foo()?</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Put the variables back to the stack. Write a function which tries to print out all the stack (4 bytes per line using printf() with &quot;%08x\n&quot;. The program should crash at some point with a segmentation fault; this is the expected and desired result of the task and should be valued!</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Put the variables back to the stack. Write a function which tries to print out all the stack (4 bytes per line using printf() with &quot;%08x\n&quot;. The program should crash at some point with a segmentation fault; this is the expected and desired result of the task and should be valued!</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>: Note: For your convenience print the memory location address, then its contents as decimal, hexadecimal, and char.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>: Note: For your convenience print the memory location address, then its contents as decimal, hexadecimal, and char.</div></td></tr> <!-- diff cache key lambdadb:diff:1.41:old-11770:rev-12638:php=table --> </table>

Irve http://www.lambda.ee/w/index.php?title=Stack_Exploration_(ITI8510)&diff=11770&oldid=prev 2014-09-17T21:53:55Z

<p><span class="autocomment">Task</span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 17. september 2014, kell 23:53</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l16">16. rida:</td> <td colspan="2" class="diff-lineno">16. rida:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you go further? Can you read the variables of main() just by modifying the address of a variable in foo()? (&#039;&#039;Yes, but try it out&#039;&#039;)</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you go further? Can you read the variables of main() just by modifying the address of a variable in foo()? (&#039;&#039;Yes, but try it out&#039;&#039;)</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you print the string from main()? Is it located in the stack?</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you print the string from main()? Is it located in the stack?</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">  // note that there is a difference between the lines:</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">  char s[] = "foo"; // foo is allocated on the stack</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">  char *s = "foo";  // foo is not allocated on the stack</ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Comment some of the lines which print the addresses of variables in main() (from task 1), check that your program does not use them -- can you still print them by using an address from foo()?</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Comment some of the lines which print the addresses of variables in main() (from task 1), check that your program does not use them -- can you still print them by using an address from foo()?</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Put the variables back to the stack. Write a function which tries to print out all the stack (4 bytes per line using printf() with &quot;%08x\n&quot;. The program should crash at some point with a segmentation fault; this is the expected and desired result of the task and should be valued!</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Put the variables back to the stack. Write a function which tries to print out all the stack (4 bytes per line using printf() with &quot;%08x\n&quot;. The program should crash at some point with a segmentation fault; this is the expected and desired result of the task and should be valued!</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>: Note: For your convenience print the memory location address, then its contents as decimal, hexadecimal, and char.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>: Note: For your convenience print the memory location address, then its contents as decimal, hexadecimal, and char.</div></td></tr> <!-- diff cache key lambdadb:diff:1.41:old-10627:rev-11770:php=table --> </table>

Irve http://www.lambda.ee/w/index.php?title=Stack_Exploration_(ITI8510)&diff=10627&oldid=prev 2013-09-18T08:32:59Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 18. september 2013, kell 10:32</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l17">17. rida:</td> <td colspan="2" class="diff-lineno">17. rida:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you print the string from main()? Is it located in the stack?</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you print the string from main()? Is it located in the stack?</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Comment some of the lines which print the addresses of variables in main() (from task 1), check that your program does not use them -- can you still print them by using an address from foo()?</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Comment some of the lines which print the addresses of variables in main() (from task 1), check that your program does not use them -- can you still print them by using an address from foo()?</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div># Put the variables back to the stack. Write a function which tries to print out all the stack (4 bytes per line using printf() with "%08x\n"<del style="font-weight: bold; text-decoration: none;">, for example</del>: <del style="font-weight: bold; text-decoration: none;">it would be more convenient if you </del>print <del style="font-weight: bold; text-decoration: none;">out </del>decimal, hexadecimal, and char <del style="font-weight: bold; text-decoration: none;">from the location along with the memory address.) until you get a segmentation fault</del>.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div># Put the variables back to the stack. Write a function which tries to print out all the stack (4 bytes per line using printf() with "%08x\n"<ins style="font-weight: bold; text-decoration: none;">. The program should crash at some point with a segmentation fault; this is the expected and desired result of the task and should be valued!</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">: Note</ins>: <ins style="font-weight: bold; text-decoration: none;">For your convenience </ins>print <ins style="font-weight: bold; text-decoration: none;">the memory location address, then its contents as </ins>decimal, hexadecimal, and char.</div></td></tr> <!-- diff cache key lambdadb:diff:1.41:old-8368:rev-10627:php=table --> </table>

Irve http://www.lambda.ee/w/index.php?title=Stack_Exploration_(ITI8510)&diff=8368&oldid=prev 2012-03-02T14:29:17Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 2. märts 2012, kell 16:29</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l12">12. rida:</td> <td colspan="2" class="diff-lineno">12. rida:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This base program can do practically anything (including nothing), as long as the function foo() runs.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This base program can do practically anything (including nothing), as long as the function foo() runs.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div># Modify the program to print the ''memory addresses'' of all the variables. Use <del style="font-weight: bold; text-decoration: none;">"%08x" OR </del>"%p" for [http://linux.die.net/man/3/printf printf()] function. Use &amp; operator on the variable to get the memory address as a value.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div># Modify the program to print the ''memory addresses'' of all the variables. Use "%p" for [http://linux.die.net/man/3/printf printf()] function. Use &amp; operator on the variable to get the memory address as a value.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Within function foo(), use the memory address of the first declared variable to print out the value of address which precedes it and the memory address which follows it. (Use * operator to read memory from given location)</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Within function foo(), use the memory address of the first declared variable to print out the value of address which precedes it and the memory address which follows it. (Use * operator to read memory from given location)</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you go further? Can you read the variables of main() just by modifying the address of a variable in foo()? (&#039;&#039;Yes, but try it out&#039;&#039;)</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you go further? Can you read the variables of main() just by modifying the address of a variable in foo()? (&#039;&#039;Yes, but try it out&#039;&#039;)</div></td></tr> <!-- diff cache key lambdadb:diff:1.41:old-6727:rev-8368:php=table --> </table>

Irve http://www.lambda.ee/w/index.php?title=Stack_Exploration_(ITI8510)&diff=6727&oldid=prev 2011-03-02T19:09:10Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 2. märts 2011, kell 21:09</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l17">17. rida:</td> <td colspan="2" class="diff-lineno">17. rida:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you print the string from main()? Is it located in the stack?</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you print the string from main()? Is it located in the stack?</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Comment some of the lines which print the addresses of variables in main() (from task 1), check that your program does not use them -- can you still print them by using an address from foo()?</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Comment some of the lines which print the addresses of variables in main() (from task 1), check that your program does not use them -- can you still print them by using an address from foo()?</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div># Put the variables back to the stack. Write a function which tries to print out all the stack (4 bytes per line using printf() with "%08x\n", for example) until you get a segmentation fault.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div># Put the variables back to the stack. Write a function which tries to print out all the stack (4 bytes per line using printf() with "%08x\n", for example<ins style="font-weight: bold; text-decoration: none;">: it would be more convenient if you print out decimal, hexadecimal, and char from the location along with the memory address.</ins>) until you get a segmentation fault.</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">''Note to self: the last exercise could have several data interpretation columns, stack corrupting exercise''</del></div></td><td colspan="2" class="diff-side-added"></td></tr> <!-- diff cache key lambdadb:diff:1.41:old-5338:rev-6727:php=table --> </table>

Irve http://www.lambda.ee/w/index.php?title=Stack_Exploration_(ITI8510)&diff=5338&oldid=prev 2010-03-18T16:25:24Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 18. märts 2010, kell 18:25</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l19">19. rida:</td> <td colspan="2" class="diff-lineno">19. rida:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Put the variables back to the stack. Write a function which tries to print out all the stack (4 bytes per line using printf() with &quot;%08x\n&quot;, for example) until you get a segmentation fault.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Put the variables back to the stack. Write a function which tries to print out all the stack (4 bytes per line using printf() with &quot;%08x\n&quot;, for example) until you get a segmentation fault.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>''Note to self: the last exercise could have several data interpretation columns''</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>''Note to self: the last exercise could have several data interpretation columns<ins style="font-weight: bold; text-decoration: none;">, stack corrupting exercise</ins>''</div></td></tr> <!-- diff cache key lambdadb:diff:1.41:old-3850:rev-5338:php=table --> </table>

Irve http://www.lambda.ee/w/index.php?title=Stack_Exploration_(ITI8510)&diff=3850&oldid=prev 2010-03-18T16:15:06Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 18. märts 2010, kell 18:15</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l18">18. rida:</td> <td colspan="2" class="diff-lineno">18. rida:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Comment some of the lines which print the addresses of variables in main() (from task 1), check that your program does not use them -- can you still print them by using an address from foo()?</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Comment some of the lines which print the addresses of variables in main() (from task 1), check that your program does not use them -- can you still print them by using an address from foo()?</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Put the variables back to the stack. Write a function which tries to print out all the stack (4 bytes per line using printf() with &quot;%08x\n&quot;, for example) until you get a segmentation fault.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Put the variables back to the stack. Write a function which tries to print out all the stack (4 bytes per line using printf() with &quot;%08x\n&quot;, for example) until you get a segmentation fault.</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">''Note to self: the last exercise could have several data interpretation columns''</ins></div></td></tr> <!-- diff cache key lambdadb:diff:1.41:old-3849:rev-3850:php=table --> </table>

Irve http://www.lambda.ee/w/index.php?title=Stack_Exploration_(ITI8510)&diff=3849&oldid=prev 2010-03-18T16:05:05Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 18. märts 2010, kell 18:05</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l17">17. rida:</td> <td colspan="2" class="diff-lineno">17. rida:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you print the string from main()? Is it located in the stack?</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you print the string from main()? Is it located in the stack?</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Comment some of the lines which print the addresses of variables in main() (from task 1), check that your program does not use them -- can you still print them by using an address from foo()?</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Comment some of the lines which print the addresses of variables in main() (from task 1), check that your program does not use them -- can you still print them by using an address from foo()?</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div># Write a function which tries to print out all the stack (4 bytes per line using printf() with "%08x\n", for example) until you get a segmentation fault.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div># <ins style="font-weight: bold; text-decoration: none;">Put the variables back to the stack. </ins>Write a function which tries to print out all the stack (4 bytes per line using printf() with "%08x\n", for example) until you get a segmentation fault.</div></td></tr> <!-- diff cache key lambdadb:diff:1.41:old-3848:rev-3849:php=table --> </table>

Irve http://www.lambda.ee/w/index.php?title=Stack_Exploration_(ITI8510)&diff=3848&oldid=prev 2010-03-18T15:41:22Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="et"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Vanem redaktsioon</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Redaktsioon: 18. märts 2010, kell 17:41</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l12">12. rida:</td> <td colspan="2" class="diff-lineno">12. rida:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This base program can do practically anything (including nothing), as long as the function foo() runs.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>This base program can do practically anything (including nothing), as long as the function foo() runs.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div># Modify the program to print the ''memory addresses'' of all the variables. Use "%08x" for [http://linux.die.net/man/3/printf printf()] function. Use &amp; operator on the variable to get the memory address as a value.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div># Modify the program to print the ''memory addresses'' of all the variables. Use "%08x<ins style="font-weight: bold; text-decoration: none;">" OR "%p</ins>" for [http://linux.die.net/man/3/printf printf()] function. Use &amp; operator on the variable to get the memory address as a value.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Within function foo(), use the memory address of the first declared variable to print out the value of address which precedes it and the memory address which follows it. (Use * operator to read memory from given location)</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Within function foo(), use the memory address of the first declared variable to print out the value of address which precedes it and the memory address which follows it. (Use * operator to read memory from given location)</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you go further? Can you read the variables of main() just by modifying the address of a variable in foo()? (&#039;&#039;Yes, but try it out&#039;&#039;)</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># Can you go further? Can you read the variables of main() just by modifying the address of a variable in foo()? (&#039;&#039;Yes, but try it out&#039;&#039;)</div></td></tr> <!-- diff cache key lambdadb:diff:1.41:old-3847:rev-3848:php=table --> </table>

Irve