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Viewing changes to arch/x86/tools/distill.awk

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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arch/x86/tools/distill.awk
 
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#!/bin/awk -f
 
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# Usage: objdump -d a.out | awk -f distill.awk | ./test_get_len
 
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# Distills the disassembly as follows:
 
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# - Removes all lines except the disassembled instructions.
 
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# - For instructions that exceed 1 line (7 bytes), crams all the hex bytes
 
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# into a single line.
 
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# - Remove bad(or prefix only) instructions
 
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BEGIN {
 
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        prev_addr = ""
 
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        prev_hex = ""
 
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        prev_mnemonic = ""
 
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        bad_expr = "(\\(bad\\)|^rex|^.byte|^rep(z|nz)$|^lock$|^es$|^cs$|^ss$|^ds$|^fs$|^gs$|^data(16|32)$|^addr(16|32|64))"
 
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        fwait_expr = "^9b "
 
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        fwait_str="9b\tfwait"
 
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}
 
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/^ *[0-9a-f]+ <[^>]*>:/ {
 
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        # Symbol entry
 
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        printf("%s%s\n", $2, $1)
 
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}
 
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/^ *[0-9a-f]+:/ {
 
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        if (split($0, field, "\t") < 3) {
 
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                # This is a continuation of the same insn.
 
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                prev_hex = prev_hex field[2]
 
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        } else {
 
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                # Skip bad instructions
 
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                if (match(prev_mnemonic, bad_expr))
 
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                        prev_addr = ""
 
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                # Split fwait from other f* instructions
 
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                if (match(prev_hex, fwait_expr) && prev_mnemonic != "fwait") {
 
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                        printf "%s\t%s\n", prev_addr, fwait_str
 
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                        sub(fwait_expr, "", prev_hex)
 
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                }
 
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                if (prev_addr != "")
 
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                        printf "%s\t%s\t%s\n", prev_addr, prev_hex, prev_mnemonic
 
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                prev_addr = field[1]
 
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                prev_hex = field[2]
 
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                prev_mnemonic = field[3]
 
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        }
 
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}
 
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END {
 
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        if (prev_addr != "")
 
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                printf "%s\t%s\t%s\n", prev_addr, prev_hex, prev_mnemonic
 
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}