colorized go-objdump

go-objdump.sh

#!/bin/bash
# go-objdump colorizes and reformats output of `go tool objdump`
# - it inserts an empty line after unconditional control-flow modifying instructions (JMP, RET, UD2)
# - it colors calls/returns in green
# - it colors traps (UD2) in red
# - it colors jumps (both conditional and unconditional) in blue
# - it colors padding/nops in violet
# - it colors the function name in yellow
# - it unindent the function body

go tool objdump -S "$@" |
   gsed -E 's/^  ([^\t]+)(.*)/\1  \2/' |
   sed -E "s,^(TEXT )([^ ]+)(.*),$(tput setaf 3)\\1$(tput bold)\\2$(tput sgr0)$(tput setaf 3)\\3$(tput sgr0)," |
   gsed -E 's/((JMP|RET|UD2).*)$/\1\n/' |
   sed -E "s,.*(CALL |RET).*,$(tput setaf 2)&$(tput sgr0)," |
   sed -E "s,.*UD2.*,$(tput setaf 1)&$(tput sgr0)," |
   sed -E "s,.*J[A-Z]+.*,$(tput setaf 4)&$(tput sgr0)," |
   sed -E "s,.*(INT \\\$0x3|NOP).*,$(tput setaf 5)&$(tput sgr0),"