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Commit | Line | Data |
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ca0e9bad MH |
1 | #!/bin/awk -f |
2 | # Usage: objdump -d a.out | awk -f distill.awk | ./test_get_len | |
3 | # Distills the disassembly as follows: | |
4 | # - Removes all lines except the disassembled instructions. | |
5 | # - For instructions that exceed 1 line (7 bytes), crams all the hex bytes | |
6 | # into a single line. | |
7 | # - Remove bad(or prefix only) instructions | |
8 | ||
9 | BEGIN { | |
10 | prev_addr = "" | |
11 | prev_hex = "" | |
12 | prev_mnemonic = "" | |
13 | bad_expr = "(\\(bad\\)|^rex|^.byte|^rep(z|nz)$|^lock$|^es$|^cs$|^ss$|^ds$|^fs$|^gs$|^data(16|32)$|^addr(16|32|64))" | |
14 | fwait_expr = "^9b " | |
15 | fwait_str="9b\tfwait" | |
16 | } | |
17 | ||
35039eb6 MH |
18 | /^ *[0-9a-f]+ <[^>]*>:/ { |
19 | # Symbol entry | |
20 | printf("%s%s\n", $2, $1) | |
21 | } | |
22 | ||
ca0e9bad MH |
23 | /^ *[0-9a-f]+:/ { |
24 | if (split($0, field, "\t") < 3) { | |
25 | # This is a continuation of the same insn. | |
26 | prev_hex = prev_hex field[2] | |
27 | } else { | |
28 | # Skip bad instructions | |
29 | if (match(prev_mnemonic, bad_expr)) | |
30 | prev_addr = "" | |
31 | # Split fwait from other f* instructions | |
32 | if (match(prev_hex, fwait_expr) && prev_mnemonic != "fwait") { | |
33 | printf "%s\t%s\n", prev_addr, fwait_str | |
34 | sub(fwait_expr, "", prev_hex) | |
35 | } | |
36 | if (prev_addr != "") | |
37 | printf "%s\t%s\t%s\n", prev_addr, prev_hex, prev_mnemonic | |
38 | prev_addr = field[1] | |
39 | prev_hex = field[2] | |
40 | prev_mnemonic = field[3] | |
41 | } | |
42 | } | |
43 | ||
44 | END { | |
45 | if (prev_addr != "") | |
46 | printf "%s\t%s\t%s\n", prev_addr, prev_hex, prev_mnemonic | |
47 | } |