Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #!/bin/sh -x |
| 2 | # Based on the vmlinux file create the System.map file |
| 3 | # System.map is used by module-init tools and some debugging |
Adrian Bunk | 943ffb5 | 2006-01-10 00:10:13 +0100 | [diff] [blame] | 4 | # tools to retrieve the actual addresses of symbols in the kernel. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | # |
| 6 | # Usage |
| 7 | # mksysmap vmlinux System.map |
| 8 | |
| 9 | |
| 10 | ##### |
| 11 | # Generate System.map (actual filename passed as second argument) |
| 12 | |
| 13 | # $NM produces the following output: |
| 14 | # f0081e80 T alloc_vfsmnt |
| 15 | |
| 16 | # The second row specify the type of the symbol: |
| 17 | # A = Absolute |
| 18 | # B = Uninitialised data (.bss) |
Masatake YAMATO | 4fec542 | 2012-07-14 01:38:57 +0900 | [diff] [blame^] | 19 | # C = Common symbol |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | # D = Initialised data |
| 21 | # G = Initialised data for small objects |
| 22 | # I = Indirect reference to another symbol |
| 23 | # N = Debugging symbol |
| 24 | # R = Read only |
| 25 | # S = Uninitialised data for small objects |
| 26 | # T = Text code symbol |
| 27 | # U = Undefined symbol |
| 28 | # V = Weak symbol |
| 29 | # W = Weak symbol |
| 30 | # Corresponding small letters are local symbols |
| 31 | |
| 32 | # For System.map filter away: |
| 33 | # a - local absolute symbols |
| 34 | # U - undefined global symbols |
Sam Ravnborg | aab34ac | 2008-05-19 20:07:58 +0200 | [diff] [blame] | 35 | # N - debugging symbols |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | # w - local weak symbols |
| 37 | |
| 38 | # readprofile starts reading symbols when _stext is found, and |
| 39 | # continue until it finds a symbol which is not either of 'T', 't', |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 40 | # 'W' or 'w'. __crc_ are 'A' and placed in the middle |
| 41 | # so we just ignore them to let readprofile continue to work. |
| 42 | # (At least sparc64 has __crc_ in the middle). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Sam Ravnborg | 2ea0389 | 2009-01-14 21:38:20 +0100 | [diff] [blame] | 44 | $NM -n $1 | grep -v '\( [aNUw] \)\|\(__crc_\)\|\( \$[adt]\)' > $2 |
| 45 | |