objdump_reformat.awk (1324B)
1#!/bin/awk -f 2# SPDX-License-Identifier: GPL-2.0 3# Usage: objdump -d a.out | awk -f objdump_reformat.awk | ./insn_decoder_test 4# Reformats the disassembly as follows: 5# - Removes all lines except the disassembled instructions. 6# - For instructions that exceed 1 line (7 bytes), crams all the hex bytes 7# into a single line. 8# - Remove bad(or prefix only) instructions 9 10BEGIN { 11 prev_addr = "" 12 prev_hex = "" 13 prev_mnemonic = "" 14 bad_expr = "(\\(bad\\)|^rex|^.byte|^rep(z|nz)$|^lock$|^es$|^cs$|^ss$|^ds$|^fs$|^gs$|^data(16|32)$|^addr(16|32|64))" 15 fwait_expr = "^9b " 16 fwait_str="9b\tfwait" 17} 18 19/^ *[0-9a-f]+ <[^>]*>:/ { 20 # Symbol entry 21 printf("%s%s\n", $2, $1) 22} 23 24/^ *[0-9a-f]+:/ { 25 if (split($0, field, "\t") < 3) { 26 # This is a continuation of the same insn. 27 prev_hex = prev_hex field[2] 28 } else { 29 # Skip bad instructions 30 if (match(prev_mnemonic, bad_expr)) 31 prev_addr = "" 32 # Split fwait from other f* instructions 33 if (match(prev_hex, fwait_expr) && prev_mnemonic != "fwait") { 34 printf "%s\t%s\n", prev_addr, fwait_str 35 sub(fwait_expr, "", prev_hex) 36 } 37 if (prev_addr != "") 38 printf "%s\t%s\t%s\n", prev_addr, prev_hex, prev_mnemonic 39 prev_addr = field[1] 40 prev_hex = field[2] 41 prev_mnemonic = field[3] 42 } 43} 44 45END { 46 if (prev_addr != "") 47 printf "%s\t%s\t%s\n", prev_addr, prev_hex, prev_mnemonic 48}