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Linux/scripts/mksysmap

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  1 #!/bin/sed -f
  2 # SPDX-License-Identifier: GPL-2.0-only
  3 #
  4 # sed script to filter out symbols that are not needed for System.map,
  5 # or not suitable for kallsyms. The input should be 'nm -n <file>'.
  6 #
  7 # System.map is used by module-init tools and some debugging
  8 # tools to retrieve the actual addresses of symbols in the kernel.
  9 #
 10 # readprofile starts reading symbols when _stext is found, and
 11 # continue until it finds a symbol which is not either of 'T', 't',
 12 # 'W' or 'w'.
 13 #
 14 # ---------------------------------------------------------------------------
 15 # Ignored symbol types
 16 #
 17 
 18 # a: local absolute symbols
 19 # N: debugging symbols
 20 # U: undefined global symbols
 21 # w: local weak symbols
 22 / [aNUw] /d
 23 
 24 # ---------------------------------------------------------------------------
 25 # Ignored prefixes
 26 #  (do not forget a space before each pattern)
 27 
 28 # local symbols for ARM, MIPS, etc.
 29 / \\$/d
 30 
 31 # local labels, .LBB, .Ltmpxxx, .L__unnamed_xx, .LASANPC, etc.
 32 / \.L/d
 33 
 34 # arm64 EFI stub namespace
 35 / __efistub_/d
 36 
 37 # arm64 local symbols in PIE namespace
 38 / __pi_\\$/d
 39 / __pi_\.L/d
 40 
 41 # arm64 local symbols in non-VHE KVM namespace
 42 / __kvm_nvhe_\\$/d
 43 / __kvm_nvhe_\.L/d
 44 
 45 # lld arm/aarch64/mips thunks
 46 / __[[:alnum:]]*Thunk_/d
 47 
 48 # CFI type identifiers
 49 / __kcfi_typeid_/d
 50 / __kvm_nvhe___kcfi_typeid_/d
 51 / __pi___kcfi_typeid_/d
 52 
 53 # CRC from modversions
 54 / __crc_/d
 55 
 56 # EXPORT_SYMBOL (symbol name)
 57 / __kstrtab_/d
 58 
 59 # EXPORT_SYMBOL (namespace)
 60 / __kstrtabns_/d
 61 
 62 # ---------------------------------------------------------------------------
 63 # Ignored suffixes
 64 #  (do not forget '$' after each pattern)
 65 
 66 # arm
 67 /_from_arm$/d
 68 /_from_thumb$/d
 69 /_veneer$/d
 70 
 71 # ---------------------------------------------------------------------------
 72 # Ignored symbols (exact match)
 73 #  (do not forget a space before and '$' after each pattern)
 74 
 75 # for LoongArch?
 76 / L0$/d
 77 
 78 # ppc
 79 / _SDA_BASE_$/d
 80 / _SDA2_BASE_$/d
 81 
 82 # ---------------------------------------------------------------------------
 83 # Ignored patterns
 84 #  (symbols that contain the pattern are ignored)
 85 
 86 # ppc stub
 87 /\.long_branch\./d
 88 /\.plt_branch\./d

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