| #!/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 = Common 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 | |
| # N - debugging 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'. | |
| # | |
| # Ignored prefixes: | |
| # $ - local symbols for ARM, MIPS, etc. | |
| # .L - local labels, .LBB,.Ltmpxxx,.L__unnamed_xx,.LASANPC, etc. | |
| # __crc_ - modversions | |
| # __kstrtab_ - EXPORT_SYMBOL (symbol name) | |
| # __kstrtabns_ - EXPORT_SYMBOL (namespace) | |
| # | |
| # Ignored symbols: | |
| # L0 - for LoongArch? | |
| $NM -n $1 | grep -v \ | |
| -e ' [aNUw] ' \ | |
| -e ' \$' \ | |
| -e ' \.L' \ | |
| -e ' __crc_' \ | |
| -e ' __kstrtab_' \ | |
| -e ' __kstrtabns_' \ | |
| -e ' L0$' \ | |
| > $2 |