diff options
Diffstat (limited to 'docs/posts/2023-10-04-bomb-lab.html')
| -rw-r--r-- | docs/posts/2023-10-04-bomb-lab.html | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/docs/posts/2023-10-04-bomb-lab.html b/docs/posts/2023-10-04-bomb-lab.html index aae2d2d..4414f04 100644 --- a/docs/posts/2023-10-04-bomb-lab.html +++ b/docs/posts/2023-10-04-bomb-lab.html @@ -176,7 +176,7 @@ End<span class="w"> </span>of<span class="w"> </span>assembler<span class="w"> < <p>By executing <code>mov %rsp,%rbp</code> we are setting the base pointer (<code>%rbp</code>) to point to this address.</p> -<p>Now, for the second instruction <code>mov $0x1,%ebx</code>, we are initalising the <code>%ebx</code> register with the value 1. Based on the assembly code, you can see that this is being used as a counter/index for the loop.</p> +<p>Now, for the second instruction <code>mov $0x1,%ebx</code>, we are initialising the <code>%ebx</code> register with the value 1. Based on the assembly code, you can see that this is being used as a counter/index for the loop.</p> <div class="codehilite"> <pre><span></span><code><span class="w"> </span>0x000055555555560b<span class="w"> </span><+32>:<span class="w"> </span>jmp<span class="w"> </span>0x555555555620<span class="w"> </span><phase_2+53> @@ -213,7 +213,7 @@ End<span class="w"> </span>of<span class="w"> </span>assembler<span class="w"> < </code></pre> </div> -<p>Here, we can see that the program increments <code>%ebx</code> by 1, adds a 4 byte offset to <code>%rbp</code> (the number we will be matching now), and checks if <code>%ebx</code> is equal to 6. If it is, it breaks the loop and jumps to <code><phase_2+70></code> succesfully finishing this stage.</p> +<p>Here, we can see that the program increments <code>%ebx</code> by 1, adds a 4 byte offset to <code>%rbp</code> (the number we will be matching now), and checks if <code>%ebx</code> is equal to 6. If it is, it breaks the loop and jumps to <code><phase_2+70></code> successfully finishing this stage.</p> <p>Now, given that we know the first two numbers in the sequence are <code>0 1</code>, we can calculate the other numbers by following the pattern of adding the counter and the value of the previous number.</p> @@ -423,7 +423,7 @@ Dump<span class="w"> </span>of<span class="w"> </span>assembler<span class="w"> <p>The program checks whether <code>scanf</code> returns a value <= 2, if it does then it calls the <code>explode_bomb</code> function. </p> -<p><em>Note: <code>scanf</code> returns the number of fields that were succesfully converted and assigned</em></p> +<p><em>Note: <code>scanf</code> returns the number of fields that were successfully converted and assigned</em></p> <div class="codehilite"> <pre><span></span><code><span class="w"> </span>0x0000555555555665<span class="w"> </span><+45>:<span class="w"> </span>cmpl<span class="w"> </span><span class="nv">$0</span>x7,0xc<span class="o">(</span>%rsp<span class="o">)</span> |