Quelle  objdump_reformat.awk   Sprache: unbekannt

#!/bin/awk -f
# SPDX-License-Identifier: GPL-2.0
# Usage: objdump -d a.out | awk -f objdump_reformat.awk | ./insn_decoder_test
# Reformats the disassembly as follows:
# - Removes all lines except the disassembled instructions.
# - For instructions that exceed 1 line (7 bytes), crams all the hex bytes
# into a single line.
# - Remove bad(or prefix only) instructions

BEGIN {
 prev_addr = ""
 prev_hex = ""
 prev_mnemonic = ""
 bad_expr = "(\\(bad\\)|<unknown>|^rex|^.byte|^rep(z|nz)$|^lock$|^es$|^cs$|^ss$|^ds$|^fs$|^gs$|^data(16|32)$|^addr(16|32|64))"
 fwait_expr = "^9b[ \t]*fwait"
 fwait_str="9b\tfwait"
}

/^ *[0-9a-f]+ <[^>]*>:/ {
 # Symbol entry
 printf("%s%s\n", $2, $1)
}

/^ *[0-9a-f]+:/ {
 if (split($0, field, /: |\t/) < 3) {
  # This is a continuation of the same insn.
  prev_hex = prev_hex field[2]
 } else {
  # Skip bad instructions
  if (match(prev_mnemonic, bad_expr))
   prev_addr = ""
  # Split fwait from other f* instructions
  if (match(prev_hex, fwait_expr) && prev_mnemonic != "fwait") {
   printf "%s\t%s\n", prev_addr, fwait_str
   sub(fwait_expr, "", prev_hex)
  }
  if (prev_addr != "")
   printf "%s\t%s\t%s\n", prev_addr, prev_hex, prev_mnemonic
  prev_addr = field[1]
  prev_hex = field[2]
  prev_mnemonic = field[3]
 }
}

END {
 if (prev_addr != "")
  printf "%s\t%s\t%s\n", prev_addr, prev_hex, prev_mnemonic
}