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x86/boot: Fix minor fd leakage in tools/relocs.c
[~shefty/rdma-dev.git] / arch / x86 / tools / distill.awk
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
18 /^ *[0-9a-f]+ <[^>]*>:/ {
19         # Symbol entry
20         printf("%s%s\n", $2, $1)
21 }
22
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 }