From: Mart Lubbers <mart@martlubbers.net>
Date: Mon, 9 Mar 2015 14:48:48 +0000 (+0100)
Subject: ass5aexb
X-Git-Url: https://git.martlubbers.net/?a=commitdiff_plain;h=123c03586cc09674006c8217a7c8075bd3b2aa27;p=sws1-1415.git

ass5aexb
---

diff --git a/ass5a/sws1-assignment5-s4109503-s4202015/exercise2b b/ass5a/sws1-assignment5-s4109503-s4202015/exercise2b
new file mode 100644
index 0000000..0aa5bce
--- /dev/null
+++ b/ass5a/sws1-assignment5-s4109503-s4202015/exercise2b
@@ -0,0 +1,52 @@
+(gdb) break function_b
+(gdb) run
+(gdb) info stack
+(gdb) frame 0
+(gdb) info frame
+
+For knowing register values I did
+(gdb) i r REGISTERNAME
+
+For all values i did:
+(gdb) x 0xADDRESS
+
+Data			Question
+===============================================================================
+0			which frame it is
+function_b		which function the frame belongs to
+0x7fffffffe850		the location (address in memory) of the frame
+0x7fffffffe870		the location of the frame it was called by
+0x40050e		the value of the instruction pointer
+0x7fffffffe870		the location of the return address,
+0x400560		the value of the return address,
+0x7fffffffe840		the value of the base pointer
+0x7fffffffe840		the location of the saved base pointer,
+0x7fffffffe860		the value of the saved base pointer,
+0x400560		the value of the stack pointer
+0x7fffffffe840		the address of the local variable
+
+1			which frame it is
+function_a		which function the frame belongs to
+0x7fffffffe870		the location (address in memory) of the frame
+0x7fffffffe880		the location of the frame it was called by
+0xfe9ee80040060ebf	the value of the instruction pointer
+0x7fffffffe860		the location of the return address
+0x7fffffffe870		the value of the return address
+0x7fffffffe870		the value of the base pointer
+0x7fffffffe860		the location of the saved base pointer,
+0x7fffffffe870		the value of the saved base pointer
+0x7fffffffe870		the value of the stack pointer
+0x7fffffffe860		the address of the local variable
+
+2			which frame it is
+main			which function the frame belongs to
+0x7fffffffe880		the location (address in memory) of the frame
+0x7fffffffe870		the location of the frame it was called by
+0xfe89e800400622bf	the value of the instruction pointer
+0x7fffffffe870		the location of the return address
+0x7fffffffe870		the value of the return address
+0x400560		the value of the base pointer
+0x7fffffffe870		the location of the saved base pointer,
+0x400560		the value of the saved base pointer
+0x400560		the value of the stack pointer
+0x7fffffffe870		the address of the local variable
diff --git a/ass5a/sws1-assignment5-s4109503-s4202015/exercise2a.c b/ass5a/sws1-assignment5-s4109503-s4202015/exercise3.c
similarity index 73%
rename from ass5a/sws1-assignment5-s4109503-s4202015/exercise2a.c
rename to ass5a/sws1-assignment5-s4109503-s4202015/exercise3.c
index 66cdd55..bbceb78 100644
--- a/ass5a/sws1-assignment5-s4109503-s4202015/exercise2a.c
+++ b/ass5a/sws1-assignment5-s4109503-s4202015/exercise3.c
@@ -1,13 +1,9 @@
 #include <stdio.h>
-#include <string.h>
 
 void function_b(void)
 {
 	char buffer[4];
-	char *p = buffer;
-	while(*(int *)++p != (int)0xa0b1c2d3);
-	while(--p > buffer)
-		*p = 0;
+
 	printf("Executing function_b\n");
 }