From c8e14a3d5c8ca3aea06c9035308a1475cc70aa30 Mon Sep 17 00:00:00 2001
From: johannst <johannes.stoelp@gmail.com>
Date: Sat, 14 Mar 2020 16:04:32 +0100
Subject: migrate binary.txt + explore-elf.txt

---
 binary.txt | 75 --------------------------------------------------------------
 1 file changed, 75 deletions(-)
 delete mode 100644 binary.txt

(limited to 'binary.txt')

diff --git a/binary.txt b/binary.txt
deleted file mode 100644
index 37bcc06..0000000
--- a/binary.txt
+++ /dev/null
@@ -1,75 +0,0 @@
-# binary
---------------------------------------------------------------------------------
-
-# toc
-------
-  |od|
-  |xxd|
-
-# od(1)                                                                     *od*
-========
-  args:
-    -An         don't print addr info
-    -tx4        print hex in 4 byte chunks
-    -ta         print as named character
-    -tc         printable chars or backslash escape
-    -w4         print 4 bytes per line
-    -j <n>      skip <n> bytes from file, (hex if start with 0x)
-    -N <n>      dump <n> bytes (hex of start with 0x)
-
-  ## ascii chars to hex string
-  echo -n AAAABBBB | od -An -w4 -tx4
-    >> 41414141
-    >> 42424242
-
-  echo -n '\x7fELF\n' | od -tx1 -ta -tc
-    >> 0000000  7f  45  4c  46  0a
-    >>         del   E   L   F  nl
-    >>         177   E   L   F  \n
-
-  ## extract part of file (eg .rodata section form ELF)
-  readelf -W -S foo
-    >> Section Headers:
-    >> [Nr] Name              Type            Address          Off    Size   ES Flg Lk Inf Al
-    >> ...
-    >> [15] .rodata           PROGBITS        00000000004009c0 0009c0 000030 00   A  0   0 16
-  od -j 0x0009c0 -N 0x30 -tx4 -w4 foo
-    >> 0004700 00020001
-    >> 0004704 00000000
-    >> *
-    >> 0004740 00000001
-    >> 0004744 00000002
-    >> 0004750 00000003
-    >> 0004754 00000004
-
-# xxd(1)                                                                   *xxd*
-=========
-  args:
-    -p          dump continuous hexdump
-    -r          convert hexdump into binary ('revert')
-    -e          dump as little endian mode
-    -i          output as C array
-
-  ## from ascii to hex stream
-  echo -n 'aabb' | xxd -p
-    >> 61616262
-
-  ## from hex to binary stream
-  echo -n '61616262' | xxd -p -r
-    >> aabb
-
-  ## ascii to binary
-  echo -n '\x7fELF' | xxd -p | xxd -r -p | file -p -
-    >> ELF
-
-  ## ascii to C array (hex encoded)
-  xxd -i <(echo -n '\x7fELF')
-    >> unsigned char _proc_self_fd_11[] = {
-    >>   0x7f, 0x45, 0x4c, 0x46
-    >> };
-    >> unsigned int _proc_self_fd_11_len = 4;
-
-
---------------------------------------------------------------------------------
-vim:ft=help:sts=2:et:tw=80:cc=80:fo+=t
-
-- 
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