增加复习资料
This commit is contained in:
parent
3aeb42d256
commit
7b369b1217
8 changed files with 1509 additions and 0 deletions
48
复习资料/.vscode/settings.json
vendored
Normal file
48
复习资料/.vscode/settings.json
vendored
Normal file
|
|
@ -0,0 +1,48 @@
|
||||||
|
{
|
||||||
|
"latex-workshop.latex.tools": [
|
||||||
|
{
|
||||||
|
"name": "latexmk",
|
||||||
|
"command": "xelatex",
|
||||||
|
"args": [
|
||||||
|
"-synctex=1",
|
||||||
|
"-interaction=nonstopmode",
|
||||||
|
"-file-line-error",
|
||||||
|
"-pdf",
|
||||||
|
"-outdir=%OUTDIR%",
|
||||||
|
"%DOC%"
|
||||||
|
],
|
||||||
|
"env": {}
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"name": "xelatex",
|
||||||
|
"command": "xelatex",
|
||||||
|
"args": [
|
||||||
|
"-synctex=1",
|
||||||
|
"-interaction=nonstopmode",
|
||||||
|
"-file-line-error",
|
||||||
|
"%DOC%"
|
||||||
|
],
|
||||||
|
"env": {}
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"name": "pdflatex",
|
||||||
|
"command": "pdflatex",
|
||||||
|
"args": [
|
||||||
|
"-synctex=1",
|
||||||
|
"-interaction=nonstopmode",
|
||||||
|
"-file-line-error",
|
||||||
|
"%DOC%"
|
||||||
|
],
|
||||||
|
"env": {}
|
||||||
|
},
|
||||||
|
{
|
||||||
|
"name": "bibtex",
|
||||||
|
"command": "bibtex",
|
||||||
|
"args": [
|
||||||
|
"%DOCFILE%"
|
||||||
|
],
|
||||||
|
"env": {}
|
||||||
|
}
|
||||||
|
],
|
||||||
|
|
||||||
|
}
|
||||||
22
复习资料/A.aux
Normal file
22
复习资料/A.aux
Normal file
|
|
@ -0,0 +1,22 @@
|
||||||
|
\relax
|
||||||
|
\providecommand\hyper@newdestlabel[2]{}
|
||||||
|
\providecommand*\HyPL@Entry[1]{}
|
||||||
|
\HyPL@Entry{0<</S/D>>}
|
||||||
|
\@writefile{toc}{\contentsline {section}{\numberline {1}数据表示与存储}{1}{section.1}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {subsection}{\numberline {1.1}数据的类型及大小}{1}{subsection.1.1}\protected@file@percent }
|
||||||
|
\@writefile{lot}{\contentsline {table}{\numberline {1}{\ignorespaces 数据的类型及大小}}{1}{table.1}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {subsection}{\numberline {1.2}计算值域}{1}{subsection.1.2}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {subsection}{\numberline {1.3}补码}{1}{subsection.1.3}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {subsection}{\numberline {1.4}GDB查看数据}{1}{subsection.1.4}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {subsection}{\numberline {1.5}浮点数}{2}{subsection.1.5}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {subsubsection}{\numberline {1.5.1}规格化数 $ \text {exp} \ne 0$ 且 $\text {exp} \ne 11 \dots 1$}{2}{subsubsection.1.5.1}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {subsubsection}{\numberline {1.5.2}非规格化数 $\text {exp} = 0 $}{2}{subsubsection.1.5.2}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {subsubsection}{\numberline {1.5.3}舍入(到偶数)}{2}{subsubsection.1.5.3}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {section}{\numberline {2}程序的机器级表示}{3}{section.2}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {subsection}{\numberline {2.1}计算数组元素的地址}{3}{subsection.2.1}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {subsection}{\numberline {2.2}其他内容}{3}{subsection.2.2}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {section}{\numberline {3}链接}{3}{section.3}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {subsection}{\numberline {3.1}符号表 (.symtab)}{3}{subsection.3.1}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {subsection}{\numberline {3.2}链接顺序}{3}{subsection.3.2}\protected@file@percent }
|
||||||
|
\@writefile{toc}{\contentsline {subsection}{\numberline {3.3}重定位}{3}{subsection.3.3}\protected@file@percent }
|
||||||
|
\gdef \@abspage@last{3}
|
||||||
1126
复习资料/A.log
Normal file
1126
复习资料/A.log
Normal file
File diff suppressed because it is too large
Load diff
16
复习资料/A.out
Normal file
16
复习资料/A.out
Normal file
|
|
@ -0,0 +1,16 @@
|
||||||
|
\BOOKMARK [1][-]{section.1}{\376\377\145\160\143\156\210\150\171\072\116\016\133\130\120\250}{}% 1
|
||||||
|
\BOOKMARK [2][-]{subsection.1.1}{\376\377\145\160\143\156\166\204\174\173\127\213\123\312\131\047\134\017}{section.1}% 2
|
||||||
|
\BOOKMARK [2][-]{subsection.1.2}{\376\377\213\241\173\227\120\074\127\337}{section.1}% 3
|
||||||
|
\BOOKMARK [2][-]{subsection.1.3}{\376\377\210\145\170\001}{section.1}% 4
|
||||||
|
\BOOKMARK [2][-]{subsection.1.4}{\376\377\000G\000D\000B\147\345\167\013\145\160\143\156}{section.1}% 5
|
||||||
|
\BOOKMARK [2][-]{subsection.1.5}{\376\377\155\156\160\271\145\160}{section.1}% 6
|
||||||
|
\BOOKMARK [3][-]{subsubsection.1.5.1}{\376\377\211\304\150\074\123\026\145\160\000\040\000\040\000e\000x\000p\000\040\000=\0000\000\040\116\024\000\040\000e\000x\000p\000\040\000=\0001\0001\000\040\040\046\0001}{subsection.1.5}% 7
|
||||||
|
\BOOKMARK [3][-]{subsubsection.1.5.2}{\376\377\227\136\211\304\150\074\123\026\145\160\000\040\000e\000x\000p\000\040\000=\000\040\0000\000\040}{subsection.1.5}% 8
|
||||||
|
\BOOKMARK [3][-]{subsubsection.1.5.3}{\376\377\202\015\121\145\000\050\122\060\120\166\145\160\000\051}{subsection.1.5}% 9
|
||||||
|
\BOOKMARK [1][-]{section.2}{\376\377\172\013\136\217\166\204\147\072\126\150\176\247\210\150\171\072}{}% 10
|
||||||
|
\BOOKMARK [2][-]{subsection.2.1}{\376\377\213\241\173\227\145\160\176\304\121\103\175\040\166\204\127\060\127\100}{section.2}% 11
|
||||||
|
\BOOKMARK [2][-]{subsection.2.2}{\376\377\121\166\116\326\121\205\133\271}{section.2}% 12
|
||||||
|
\BOOKMARK [1][-]{section.3}{\376\377\224\376\143\245}{}% 13
|
||||||
|
\BOOKMARK [2][-]{subsection.3.1}{\376\377\173\046\123\367\210\150\000\040\000\050\000.\000s\000y\000m\000t\000a\000b\000\051}{section.3}% 14
|
||||||
|
\BOOKMARK [2][-]{subsection.3.2}{\376\377\224\376\143\245\230\172\136\217}{section.3}% 15
|
||||||
|
\BOOKMARK [2][-]{subsection.3.3}{\376\377\221\315\133\232\117\115}{section.3}% 16
|
||||||
BIN
复习资料/A.pdf
Normal file
BIN
复习资料/A.pdf
Normal file
Binary file not shown.
BIN
复习资料/A.synctex.gz
Normal file
BIN
复习资料/A.synctex.gz
Normal file
Binary file not shown.
282
复习资料/A.tex
Normal file
282
复习资料/A.tex
Normal file
|
|
@ -0,0 +1,282 @@
|
||||||
|
\documentclass[UTF8,punct=kaiming]{ctexart}
|
||||||
|
\usepackage{amsmath}
|
||||||
|
\usepackage[a4paper,left=2cm,right=2cm,top=2.5cm,bottom=2.5cm]{geometry}
|
||||||
|
\usepackage{multicol}
|
||||||
|
\usepackage{makecell}
|
||||||
|
\usepackage{fancyhdr}
|
||||||
|
\usepackage{hyperref}
|
||||||
|
\usepackage[type={CC},modifier={by-sa},version={4.0},lang={chinese-utf8}]{doclicense}
|
||||||
|
\usepackage{amssymb}
|
||||||
|
\usepackage{amsthm}
|
||||||
|
\usepackage[many]{tcolorbox}
|
||||||
|
\usepackage{multirow}
|
||||||
|
\usepackage{listings}
|
||||||
|
\input{insbox}
|
||||||
|
|
||||||
|
\setlength{\parindent}{0pt}
|
||||||
|
|
||||||
|
\hypersetup{hidelinks,
|
||||||
|
colorlinks=false,
|
||||||
|
allcolors=black,
|
||||||
|
pdfstartview=Fit,
|
||||||
|
breaklinks=true}
|
||||||
|
|
||||||
|
\pagestyle{fancy}
|
||||||
|
\fancypagestyle{myfancypagestyle}{
|
||||||
|
\fancyhf{}
|
||||||
|
\fancyhead[L]{计算机系统基础\uppercase\expandafter{\romannumeral1\relax} 考试用资料}
|
||||||
|
\fancyhead[R]{Made with $\heartsuit$ by \href{https://kagurach.uk/}{kagura} and \href{https://nkid00.name/}{nkid00} \& licensed under \doclicenseNameRef}
|
||||||
|
\fancyfoot[C]{\thepage}
|
||||||
|
\renewcommand{\headrulewidth}{0.4pt}
|
||||||
|
\renewcommand{\footrulewidth}{0pt}
|
||||||
|
}
|
||||||
|
\pagestyle{myfancypagestyle}
|
||||||
|
|
||||||
|
\tcbuselibrary{listings}
|
||||||
|
\tcbset{colback=white,boxrule=0.3mm,enhanced}
|
||||||
|
|
||||||
|
\lstset{basicstyle=\ttfamily,columns=fullflexible}
|
||||||
|
|
||||||
|
\columnseprule=0.4pt
|
||||||
|
|
||||||
|
\begin{document}
|
||||||
|
|
||||||
|
\section{数据表示与存储}
|
||||||
|
\subsection{数据的类型及大小}
|
||||||
|
\begin{table}[h]
|
||||||
|
\caption{数据的类型及大小}
|
||||||
|
\begin{tabular}{|c|c|c|c|c|}
|
||||||
|
\hline
|
||||||
|
类型 & 字节数 & 最小值 & 最大值(signed) & 最大值(unsigned) \\ \hline
|
||||||
|
\texttt{char} & 1 & -128 & 127 & 255\\ \hline
|
||||||
|
\texttt{short} & 2 & -32768 & 32767 & 65535\\ \hline
|
||||||
|
\texttt{int} & 4 & -2147483648 & 2147483647 & 4294967295 \\ \hline
|
||||||
|
\texttt{long} & \multirow{2}{*}{8} & \multirow{2}{*}{-9223372036854775808} & \multirow{2}{*}{9223372036854775807} & \multirow{2}{*}{18446744073709551615} \\
|
||||||
|
\cline{1-1} \texttt{void*} & & & & \\ \hline
|
||||||
|
\texttt{float} & 4 & 1.17549$\times10^{-38}$ & 3.40282$\times10^{38}$& \\ \hline
|
||||||
|
\texttt{double} & 8 & 2.22507$\times10^{-308}$ & 1.79769$\times10^{308}$ & \\ \hline
|
||||||
|
\end{tabular}
|
||||||
|
\end{table}
|
||||||
|
|
||||||
|
\subsection{计算值域}
|
||||||
|
T: 用 $n$ 位表示数字
|
||||||
|
\begin{align*}
|
||||||
|
\text{(signed) T} \quad & \text{可表示} \quad -2^{n-1} \sim ~ 2^{n-1}-1 \\
|
||||||
|
\text{(unsigned) T} \quad & \text{可表示} \quad 0 \sim 2^{n}-1
|
||||||
|
\end{align*}
|
||||||
|
|
||||||
|
\subsection{补码}
|
||||||
|
|
||||||
|
\begin{multicols}{2}
|
||||||
|
\qquad 对应正数补码的“各位取反、末位加1”
|
||||||
|
\begin{align*}
|
||||||
|
+23 & = 00010111 \\
|
||||||
|
\text{按位取反} & = 11101000 \\
|
||||||
|
& + \hspace{1.8cm} 1 \\
|
||||||
|
-23_{\text{补码}} & = 11101001
|
||||||
|
\end{align*}
|
||||||
|
|
||||||
|
\columnbreak
|
||||||
|
|
||||||
|
\qquad 模($2^n$)减去该负数的绝对值
|
||||||
|
\begin{align*}
|
||||||
|
100000000 & \\
|
||||||
|
-00010111 & \\
|
||||||
|
\rule{2.5cm}{0.02em} \\
|
||||||
|
11101001
|
||||||
|
\end{align*}
|
||||||
|
|
||||||
|
\end{multicols}
|
||||||
|
|
||||||
|
\subsection{GDB查看数据}
|
||||||
|
\begin{multicols}{2}
|
||||||
|
\texttt{>(gdb) x/4xb} \\
|
||||||
|
b - byte (8-bit value)\\
|
||||||
|
h - halfword (16-bit value) \\
|
||||||
|
w - word (32-bit value) \\
|
||||||
|
g - giant word (64-bit value)
|
||||||
|
|
||||||
|
\columnbreak
|
||||||
|
|
||||||
|
o - octal \\
|
||||||
|
x - hexadecimal \\
|
||||||
|
d - decimal \\
|
||||||
|
u - unsigned decimal \\
|
||||||
|
t - binary \\
|
||||||
|
f - floating point \\
|
||||||
|
a - address \\
|
||||||
|
c - char \\
|
||||||
|
s - string \\
|
||||||
|
i - instruction
|
||||||
|
\end{multicols}
|
||||||
|
|
||||||
|
\newpage
|
||||||
|
|
||||||
|
\subsection{浮点数}
|
||||||
|
|
||||||
|
\vspace{-1cm}
|
||||||
|
|
||||||
|
\InsertBoxR{0}{\tcbox[blank]{\begin{tabular}{|c|c|c|c|c|}
|
||||||
|
\hline 二进制位数 & s 符号位 & exp 指数 & frac 尾数 & 总计 \\
|
||||||
|
\hline \texttt{float} & 1 & 8 & 23 & 32 \\
|
||||||
|
\hline \texttt{double} & 1 & 11 & 52 & 64 \\
|
||||||
|
\hline
|
||||||
|
\end{tabular}}}
|
||||||
|
|
||||||
|
\vspace{1cm}
|
||||||
|
|
||||||
|
浮点数表示为 $(-1)^s \cdot M \cdot 2^E$
|
||||||
|
|
||||||
|
\InsertBoxR{1}{\tcboxmath{\begin{matrix}
|
||||||
|
\multicolumn{2}{c}{\text{偏置值 Bias}} \\
|
||||||
|
\texttt{float} & 127 \\
|
||||||
|
\texttt{double} & 1023 \\
|
||||||
|
\end{matrix}}\hspace{3cm}}
|
||||||
|
|
||||||
|
\subsubsection{规格化数 $ \text{exp} \ne 0$ 且 $\text{exp} \ne 11 \dots 1$}
|
||||||
|
|
||||||
|
$\text{(unsigned)} \ \text{exp} \ = \ E \ + \text{Bias}$
|
||||||
|
|
||||||
|
$\text{Bias (偏置值)} = 2^{k-1}-1$ , k 为 $exp$ 的二进制位数
|
||||||
|
|
||||||
|
\begin{multicols}{2}
|
||||||
|
例1:十进制整数$\rightarrow$二进制浮点数
|
||||||
|
\begin{align*}
|
||||||
|
\text{float} \ F &= 15213.0 \\
|
||||||
|
\text{化为二进制数:} \\
|
||||||
|
15213_{10} &= 11101101101101_{2} \\
|
||||||
|
&= 1.1101101101101_{2} \ \times \ 2^{13} \\
|
||||||
|
\text{计算 frac:} \\
|
||||||
|
M &= 1.\underbar{1101101101101}_{2} \\
|
||||||
|
\text{frac} &= \underbar{1101101101101}0000000000_{2}\\
|
||||||
|
\text{计算 exp:} \\
|
||||||
|
E &= 13 \qquad \text{来自化为二进制时的指数} \\
|
||||||
|
\text{Bias} &= 127 \\
|
||||||
|
\text{exp} &= 140 = 10001100_{2}
|
||||||
|
\end{align*}
|
||||||
|
结果：\\
|
||||||
|
\(\begin{matrix}
|
||||||
|
0 & 10001100 & 11011011011010000000000 \\
|
||||||
|
\text{s} & \text{exp} & \text{frac}
|
||||||
|
\end{matrix}\)
|
||||||
|
|
||||||
|
\columnbreak
|
||||||
|
例2:二进制浮点数$\rightarrow$十进制数\\
|
||||||
|
无符号数，4位阶码(Bias=7)，3个小数位
|
||||||
|
\begin{align*}
|
||||||
|
1001 \quad 111 \\
|
||||||
|
exp \quad frac \\
|
||||||
|
\text{计算E:} \\
|
||||||
|
E &= exp - Bias \\
|
||||||
|
&= 1001_2 - 7_{10} \\
|
||||||
|
&= 2_{10} \\
|
||||||
|
\text{计算M:} \\
|
||||||
|
M = 1.\underbar{frac} &= 1.\underbar{111} \\
|
||||||
|
\text{化为十进制:} \\
|
||||||
|
1.111 \times 2^2 &= 111.1_2 \quad \text{小数点右移2位} \\
|
||||||
|
&= 7\frac{1}{2} = \frac{15}{2}
|
||||||
|
\end{align*}
|
||||||
|
\end{multicols}
|
||||||
|
|
||||||
|
\InsertBoxR{1}{\tcboxmath{\begin{matrix}
|
||||||
|
\text{非规格化数} \ E = 1 - \text{Bias} \\
|
||||||
|
\begin{matrix}
|
||||||
|
\texttt{float} & -126 \\
|
||||||
|
\texttt{double} & -1022 \\
|
||||||
|
\end{matrix}
|
||||||
|
\end{matrix}}\hspace{2cm}}
|
||||||
|
|
||||||
|
\subsubsection{非规格化数 $\text{exp} = 0 $}
|
||||||
|
|
||||||
|
frac \(= 00\dots0\) 表示 0
|
||||||
|
|
||||||
|
frac \(\ne 00\dots0\) 表示接近 0 的小数 $(-1)^s \cdot M \cdot 2^{E}$
|
||||||
|
|
||||||
|
\subsubsection{舍入(到偶数)}
|
||||||
|
|
||||||
|
\begin{table}[h]
|
||||||
|
\begin{tabular}{|ccc|}
|
||||||
|
\hline
|
||||||
|
末两位 & 动作 & 例子（保留一位小数） \\ \hline
|
||||||
|
01 & 舍 & $11.0\underbar{01}_2 \to 11.0_2$ \\ \hline
|
||||||
|
11 & 入 & $10.0\underbar{11}_2 \to 10.1_2$ \\ \hline
|
||||||
|
10 & \makecell[c]{强迫结果为偶数(末尾为0)\\010舍 , 110入} &\makecell[c]{$10.0\underbar{10}_2 \to 10.0_2$ \\ $10.1\underbar{10}_2 \to 11.0_2$} \\ \hline
|
||||||
|
\end{tabular}
|
||||||
|
\end{table}
|
||||||
|
|
||||||
|
\pagebreak
|
||||||
|
\section{程序的机器级表示}
|
||||||
|
|
||||||
|
\subsection{计算数组元素的地址}
|
||||||
|
|
||||||
|
\begin{multicols}{2}
|
||||||
|
计算 \texttt{T* D[R][C]} 元素 \texttt{D[i][j]}的地址： \\
|
||||||
|
\(\texttt{\&D[i][j]} = \texttt{\&D[0][0]} + \texttt{sizeof(T)} \times \left(C \cdot i + j\right)\) \\
|
||||||
|
假设 \texttt{sizeof(T) = k}, 将 \texttt{D[i][j]} 复制到 \%eax 中 \\
|
||||||
|
\texttt{asm: D in \%rdi , i in \%rsi , j in \%rdx }
|
||||||
|
|
||||||
|
\columnbreak
|
||||||
|
\texttt{1 \ leaq (\%rsi,\%rsi,\$C-1), \%rax \\
|
||||||
|
2 \ leaq (\%rdi,\%rax,\$k), \%rax \\
|
||||||
|
3 \ movl (\%rax,\%rdx,\$k), \%rax \\
|
||||||
|
}
|
||||||
|
结果为 \texttt{D+ k $\cdot$ C $\cdot$ i + k $\cdot$ j} \\
|
||||||
|
即 \texttt{D + sizeof(T) $\times$ (C $\cdot$ i + j)}
|
||||||
|
\end{multicols}
|
||||||
|
|
||||||
|
\vspace{-1cm}
|
||||||
|
|
||||||
|
\subsection{其他内容}
|
||||||
|
\vspace{-2mm}
|
||||||
|
\begin{table}[h]
|
||||||
|
\begin{tabular}{c|c|c|c} \hline
|
||||||
|
内容 & 操作数计算方式& 栈&gdb常用操作\\ \hline
|
||||||
|
页码 & P121&P164&P194 \\
|
||||||
|
|
||||||
|
\hline
|
||||||
|
\end{tabular}
|
||||||
|
\end{table}
|
||||||
|
|
||||||
|
\vspace{-5mm}
|
||||||
|
|
||||||
|
\section{链接}
|
||||||
|
\subsection{符号表 (.symtab)}
|
||||||
|
|
||||||
|
\begin{table}[h]
|
||||||
|
\begin{tabular}{l|c|c|c|c}
|
||||||
|
\hline
|
||||||
|
C语言表示 & 类型 & 符号强度 & 节 & 说明\\ \hline
|
||||||
|
\texttt{void swap();} & 全局 & 强 & \texttt{.text} & 函数在.text \\ \hline
|
||||||
|
\texttt{extern int buf[];} & 外部 & --- & 实际定义所在位置 & 默认\texttt{UND}（未解析的引用符号） \\ \hline
|
||||||
|
\texttt{int *bufp0 = \&buf[0]} & 全局 & 强 & \texttt{.data} & 初始化的全局变量\\ \hline
|
||||||
|
\texttt{int *bufp1;} & 全局 & 弱 & \texttt{COMMON} & 未初始化的全局变量 \\ \hline
|
||||||
|
\begin{lstlisting}[language=C,gobble=8]
|
||||||
|
void p() {
|
||||||
|
static int i = 1; }
|
||||||
|
\end{lstlisting}
|
||||||
|
& 局部 & \makecell[c]{强\ ，不同\\函数可重} & \texttt{.data} 或 \texttt{.bss} & \makecell[l]{未初始化或初始化为0在 \ \texttt{.bss}\\初始化为其他在 \ \texttt{.data}} \\ \hline
|
||||||
|
\begin{lstlisting}[language=C,gobble=8]
|
||||||
|
void q() {
|
||||||
|
int j = 2; }
|
||||||
|
\end{lstlisting}
|
||||||
|
& 都不是 & --- & 节里没有，在栈里 & 链接器不看局部\underbar{变量} \\ \hline
|
||||||
|
\end{tabular}
|
||||||
|
\end{table}
|
||||||
|
|
||||||
|
\subsection{链接顺序}
|
||||||
|
\texttt{\$ gcc -static -o prog2c main2.o ./libvector.a} \\
|
||||||
|
E 将被合并以组成可执行文件的所有目标文件集合\\
|
||||||
|
U 当前所有未解析的引用符号的集合\\
|
||||||
|
D 当前所有定义符号的集合\\
|
||||||
|
开始 E、U、D为空，首先扫描 \texttt{main2.o}，将其加入 E，将未找到的符号加入 U, 定义的符号加入 D。 \\
|
||||||
|
再扫描 \texttt{./libvector.a}，将匹配到的 U 中的符号转移到 D 并加入到 E， 同时将未找到的符号加入 U。 \\
|
||||||
|
最后搜索标准库 \texttt{libc.a}，处理完\texttt{libc.a}时，U一定是空的，D中符号唯一，否则错误。
|
||||||
|
|
||||||
|
\subsection{重定位}
|
||||||
|
PC相对地址下重定位值计算公式：\\
|
||||||
|
\texttt{ADDR(r.symble)-((ADDR(.text)+r.offset)-r.addend)}\\
|
||||||
|
在asm中表示为 \texttt{4004de: e8 \underbar{05 00 00 00} \quad callq 4004e8 <sum>}
|
||||||
|
|
||||||
|
\pagebreak
|
||||||
|
|
||||||
|
\end{document}
|
||||||
15
复习资料/missfont.log
Normal file
15
复习资料/missfont.log
Normal file
|
|
@ -0,0 +1,15 @@
|
||||||
|
mktextfm font
|
||||||
|
mktextfm font
|
||||||
|
mktextfm font
|
||||||
|
mktextfm font/BI
|
||||||
|
mktextfm font
|
||||||
|
mktextfm font/B
|
||||||
|
mktextfm font
|
||||||
|
mktextfm font/I
|
||||||
|
mktextfm font
|
||||||
|
mktextfm font
|
||||||
|
mktextfm font
|
||||||
|
mktextfm
|
||||||
|
mktextfm
|
||||||
|
mktextfm
|
||||||
|
mktextfm
|
||||||
Loading…
Reference in a new issue