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48 lines
1.3 KiB
48 lines
1.3 KiB
#!/bin/awk -f |
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# SPDX-License-Identifier: GPL-2.0 |
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# Usage: objdump -d a.out | awk -f objdump_reformat.awk | ./insn_decoder_test |
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# Reformats 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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}
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