| #!/bin/sh -x |
| # Based on the vmlinux file create the System.map file |
| # System.map is used by module-init tools and some debugging |
| # tools to retrieve the actual addresses of symbols in the kernel. |
| # |
| # Usage |
| # mksysmap vmlinux System.map |
| |
| |
| ##### |
| # Generate System.map (actual filename passed as second argument) |
| |
| # $NM produces the following output: |
| # f0081e80 T alloc_vfsmnt |
| |
| # The second row specify the type of the symbol: |
| # A = Absolute |
| # B = Uninitialised data (.bss) |
| # C = Comon symbol |
| # D = Initialised data |
| # G = Initialised data for small objects |
| # I = Indirect reference to another symbol |
| # N = Debugging symbol |
| # R = Read only |
| # S = Uninitialised data for small objects |
| # T = Text code symbol |
| # U = Undefined symbol |
| # V = Weak symbol |
| # W = Weak symbol |
| # Corresponding small letters are local symbols |
| |
| # For System.map filter away: |
| # a - local absolute symbols |
| # U - undefined global symbols |
| # w - local weak symbols |
| |
| # readprofile starts reading symbols when _stext is found, and |
| # continue until it finds a symbol which is not either of 'T', 't', |
| # 'W' or 'w'. __crc_ are 'A' and placed in the middle |
| # so we just ignore them to let readprofile continue to work. |
| # (At least sparc64 has __crc_ in the middle). |
| |
| $NM -n $1 | grep -v '\( [aUw] \)\|\(__crc_\)\|\( \$[adt]\)' > $2 |
| |