\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{oddcoder}
\pdfinfo{
  /Title (gdb.pdf)
  /Creator (Cheatography)
  /Author (oddcoder)
  /Subject (GDB Cheat Sheet)
}

% Lengths and widths
\addtolength{\textwidth}{6cm}
\addtolength{\textheight}{-1cm}
\addtolength{\hoffset}{-3cm}
\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{000630}
\definecolor{LightBackground}{HTML}{F7F7F8}
\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{GDB Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{oddcoder} via \textcolor{DarkBackground}{\uline{cheatography.com/33871/cs/10577/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}oddcoder \\
  \uline{cheatography.com/oddcoder} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 18th January, 2017.\\
   Updated 26th September, 2018.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{x{3.84 cm} x{4.16 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{{\bf{Run GDB}}}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\emph{gdb \textless{}program\_path\textgreater{}}} & Load program into gdb \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\emph{gdb \textless{}program\_path\textgreater{} \textless{}core\_path\textgreater{}}} & Load program and core dump into gdb \tn 
% Row Count 4 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.92 cm} x{4.08 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{{\bf{Breakpoints}}}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\emph{break}} & Set break point at the current location \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\emph{break if \textless{}condition\textgreater{}}} & Set break point here that triggers if certain condition is met \tn 
% Row Count 6 (+ 4)
% Row 2
\SetRowColor{LightBackground}
{\emph{break \textless{}code\_location\textgreater{}}} & Set break point at given code location \tn 
% Row Count 8 (+ 2)
% Row 3
\SetRowColor{white}
{\emph{break \textless{}code\_location\textgreater{} if \textless{}condition\textgreater{}}} & Set break point at given code location that triggers if given condition is met \tn 
% Row Count 12 (+ 4)
% Row 4
\SetRowColor{LightBackground}
hbreak & works exactly like break but it is hardware assisted breakpoints \tn 
% Row Count 16 (+ 4)
% Row 5
\SetRowColor{white}
{\emph{info breakpoints}} & List all breakpoints and their associated num \tn 
% Row Count 19 (+ 3)
% Row 6
\SetRowColor{LightBackground}
{\emph{clear}} & Delete all break points \tn 
% Row Count 21 (+ 2)
% Row 7
\SetRowColor{white}
{\emph{delete \textless{}breakpoint\_num\textgreater{}}} & Delete breakpoint given its number \tn 
% Row Count 23 (+ 2)
% Row 8
\SetRowColor{LightBackground}
{\emph{enable \textless{}breakpoint\_num\textgreater{}}} & Enable breakpoint given its number \tn 
% Row Count 25 (+ 2)
% Row 9
\SetRowColor{white}
{\emph{disable \textless{}breakpoint\_num\textgreater{}}} & Disable breakpoint given its number \tn 
% Row Count 27 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.12 cm} x{4.88 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{{\bf{code\_location}}}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\emph{function\_name}} & self-explanatory \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
{\emph{*function\_name + offset}} & move {\emph{offset}} bytes from {\emph{function\_name}} \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\emph{*math\_expr}} & pointer evaluated from the math expression \tn 
% Row Count 5 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.4 cm} x{5.6 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Stepping}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\emph{run}} & Run the loaded program \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
{\emph{run \textless{}arguments\textgreater{}}} & Run loaded program with given arguments \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\emph{attach \textless{}pid\textgreater{}}} & Attach debugger to given process \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
{\emph{next}} & Next line of source code \tn 
% Row Count 6 (+ 1)
% Row 4
\SetRowColor{LightBackground}
{\emph{step}} & Same as {\emph{next}} but will dive into calls \tn 
% Row Count 8 (+ 2)
% Row 5
\SetRowColor{white}
{\emph{nexti}} & Next assembly instruction \tn 
% Row Count 9 (+ 1)
% Row 6
\SetRowColor{LightBackground}
{\emph{stepi}} & same as {\emph{nexti}} but will dive into calls \tn 
% Row Count 11 (+ 2)
% Row 7
\SetRowColor{white}
{\emph{finish}} & Continue till first ret instruction \tn 
% Row Count 13 (+ 2)
% Row 8
\SetRowColor{LightBackground}
{\emph{continue}} & Continue till next breakpoint \tn 
% Row Count 15 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4.24 cm} x{3.76 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Examining code}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\emph{backtrace}} & Print current backtrace \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\emph{disassemble \textless{}function\_name\textgreater{}}} & Disassemble given function \tn 
% Row Count 4 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.52 cm} x{4.48 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Memory}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\emph{print/\textless{}format\textgreater{} \textless{}expression\textgreater{}}} & Evaluate expression and print it in given format \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
{\emph{display/\textless{}format\textgreater{} \textless{}expression\textgreater{}}} & Same as {\emph{print}} however it keeps executing after each {\bf{step}} instruction \tn 
% Row Count 7 (+ 4)
% Row 2
\SetRowColor{LightBackground}
{\emph{info display}} & List all auto-display expressions and their numbers \tn 
% Row Count 10 (+ 3)
% Row 3
\SetRowColor{white}
{\emph{enable display \textless{}num\textgreater{}}} & Enable display given its number \tn 
% Row Count 12 (+ 2)
% Row 4
\SetRowColor{LightBackground}
{\emph{disable display \textless{}num\textgreater{}}} & Disable display given its number \tn 
% Row Count 14 (+ 2)
% Row 5
\SetRowColor{white}
{\emph{x/nuf \textless{}address\textgreater{}}} & Examine memory.\{\{nl\}\}n: How many units to print (default 1).\{\{nl\}\}f: Format character (like "print").\{\{nl\}\}u: Unit. Unit is one of:\{\{nl\}\}~~b: Byte\{\{nl\}\}~~h: Half-word (two bytes)\{\{nl\}\}~~w: Word (four bytes)\{\{nl\}\}~~g: Giant word (eight bytes). \tn 
% Row Count 27 (+ 13)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{0.8 cm} x{7.2 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{{\bf{Format}}}}  \tn
% Row 0
\SetRowColor{LightBackground}
a & Pointer \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
c & Character \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
d & Signed integer \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
f & Floating point number \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
i & instruction \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
o & octal \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
s & C-type strings \tn 
% Row Count 7 (+ 1)
% Row 7
\SetRowColor{white}
t & Binary \tn 
% Row Count 8 (+ 1)
% Row 8
\SetRowColor{LightBackground}
u & Unsigned integer \tn 
% Row Count 9 (+ 1)
% Row 9
\SetRowColor{white}
x & Hexadecimal \tn 
% Row Count 10 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.04 cm} x{4.96 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{General information}}  \tn
% Row 0
\SetRowColor{LightBackground}
info sharedlibrary & List loaded shared libraries \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
info proc mappings & list of mapped memory regions. \tn 
% Row Count 4 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}