QoL

x86_64/1_stdio.asm

@@ -20,6 +20,7 @@ section .bss
 section .text
 _start:
   ; x64 has the syscall function, in contrast to int in x86 and ARM
+  ; See /usr/include/asm/unistd_64.h for the numbers
 
   ; Write to stdout
   mov rax, 1
@@ -44,7 +45,6 @@ _start:
 	mov rsi, strBuffer
 	syscall
 
-
   ; Exit routine
   mov rax, 60 ; 60 is the exit routine
   xor rdi, rdi ; our return code (0)

x86_64/README.md

@@ -15,3 +15,5 @@ gcc <object-files> -o <executable-name> # When using C library functions
 ```
 
 Based upon the work of [Carmo M de F Barbosa](https://gitlab.com/mcmfb/intro_x86-64)
+
+The Linux system call table and useful links can be found [here](http://blog.rchapman.org/posts/Linux_System_Call_Table_for_x86_64/).

x86_64/debug.sh

@@ -10,13 +10,5 @@ if [ ! -x "$1" ]; then
 	exit 1
 fi
 
-echo "I will launch gdbtui soon. Use \"break *<entry-address>\" to debug the program."
-echo "Use \"layout asm\" to use a more assembly friendly layout"
-echo "Use \"si\" to single step each instruction"
-echo ""
-
-echo "$(readelf -h $1 | egrep "Entry point")"
-read -p "Copy the above address and press any key to continue..."
-
-gdbtui -q $1
-
+breakPoint="$(readelf -h $1 | egrep -i "entry" | egrep -o "0x[a-f0-9]+")"
+gdbtui -q -ex "layout asm" -ex "break *$breakPoint" $1