Dreg gdb setup intel syntax, break start, print stack one value per column etc

cheatsheet & tricks gdb

Dreg gdb setup intel syntax, break start, print stack one value per column etc

r `perl -e 'print "A" x 300'`

gdb --args /bin/ls `perl -e 'print "A" x 300'`

gdb --args /bin/ls $(python -c "print 'A' * 64 + '\xef\xbe\xad\xde'")

set args $(python -c "print 'A' * 64 + '\xef\xbe\xad\xde'")
 
run <<< $(python -c "print 'A' * 64 + '\xef\xbe\xad\xde'")

set args $(python -c "print 'A' * 64 + '\xef\xbe\xad\xde'")
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https://github.com/cyrus-and/gdb-dashboard
dashboard -layout registers assembly memory stack
dashboard registers -style column-major True
dashboard memory watch 0x00007fffffffe6a0 40
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https://github.com/scwuaptx/Pwngdb
https://github.com/stmerry/gdb-peda-cheatsheet/blob/master/gdb-peda%20cheatsheet.pdf
git clone https://github.com/longld/peda.git ~/peda
git clone https://github.com/scwuaptx/Pwngdb.git 
cp ~/Pwngdb/.gdbinit ~/
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https://github.com/hugsy/gef
-

set breakpoint pending on

set confirm off

set disassembly-flavor intel

set disassemble-next-line on

disas /r

i r

tui enable

layout asm

layout regs

starti

stepi

nexti

break* main

define dregstack
set $pos = 0
while ($pos < $arg0)
x/gx $rsp+$pos
set $pos = $pos + 8
end
end

Stack from rsp:
set $pos = 0
set $limit = 0x20
while ($pos < $limit)
x/gx $rsp+$pos
set $pos = $pos + 8
end

Stack from rbp to rsp:
set $pos = 0
while ($pos < ($rbp-$rsp))
x/gx $rbp-$pos
set $pos = $pos + 8
end


0x7fffffffe690: 0x0000000000000000
0x7fffffffe688: 0x0000000000000000
0x7fffffffe680: 0x0000000000000000
0x7fffffffe678: 0x0000000000000000
0x7fffffffe670: 0x0000000000000000
0x7fffffffe668: 0x0000000000000000
0x7fffffffe660: 0x0000000000000000
0x7fffffffe658: 0x0000000000000000
0x7fffffffe650: 0x0000000000000000
0x7fffffffe648: 0x0000000000000000
0x7fffffffe640: 0x0000000000000000
0x7fffffffe638: 0x0000000000000000


define xxd
dump binary memory dump.bin $arg0 $arg0+$arg1
shell xxd -g 1 -e dump.bin
end

xxd $esp 10

xxd 0xff89f433 10
00000000: 2f 68 6f 6d 65 2f 6b 61 6c 69                    /home/kali


Stack from ebp to esp:
set $pos = 0
while ($pos < ($ebp-$esp))
x/wx $ebp-$pos
set $pos = $pos + 4
end

Stack from esp:
set $pos = 0
set $limit = 0x20
while ($pos < $limit)
x/wx $esp+$pos
set $pos = $pos + 4
end

0xff89d6f0:     0x00000001
0xff89d6f4:     0xff89d7c4
0xff89d6f8:     0xff89d7cc
0xff89d6fc:     0x0804939d
0xff89d700:     0xff89d720
0xff89d704:     0x00000000
0xff89d708:     0x00000000
0xff89d70c:     0xf7d99df6


x/s **((char ***) ($esp + 0x4))
0xff89f433:     "/home/kali/stackb0f2/stackb0f2"

x/s 0xff89f433
0xff89f433:     "/home/kali/stackb0f2/stackb0f2"

define dregstack
set $pos = 0
while ($pos < $arg0)
x/wx $esp+$pos
set $pos = $pos + 4
end
end

dregstack 0x9
0xff89d6f0:     0x00000001
0xff89d6f4:     0xff89d7c4
0xff89d6f8:     0xff89d7cc