scripts/mksysmap

   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
   4 # tools to retrieve the actual addresses of symbols in the kernel.
   5 #
   6 # Usage
   7 # mksysmap vmlinux System.map [exclude]
   8
   9
  10 #####
  11 # Generate System.map (actual filename passed as second argument)
  12 # The following refers to the symbol type as per nm(1).
  13
  14 # readprofile starts reading symbols when _stext is found, and
  15 # continue until it finds a symbol which is not either of 'T', 't',
  16 # 'W' or 'w'.
  17 #
  18
  19 ${NM} -n ${1} | sed >${2} -e "
  20 # ---------------------------------------------------------------------------
  21 # Ignored symbol types
  22 #
  23
  24 # a: local absolute symbols
  25 # N: debugging symbols
  26 # U: undefined global symbols
  27 # w: local weak symbols
  28 / [aNUw] /d
  29
  30 # ---------------------------------------------------------------------------
  31 # Ignored prefixes
  32 #  (do not forget a space before each pattern)
  33
  34 # local symbols for ARM, MIPS, etc.
  35 / \\$/d
  36
  37 # local labels, .LBB, .Ltmpxxx, .L__unnamed_xx, .LASANPC, etc.
  38 / \.L/d
  39
  40 # arm64 EFI stub namespace
  41 / __efistub_/d
  42
  43 # arm64 local symbols in PIE namespace
  44 / __pi_\\$/d
  45 / __pi_\.L/d
  46
  47 # arm64 local symbols in non-VHE KVM namespace
  48 / __kvm_nvhe_\\$/d
  49 / __kvm_nvhe_\.L/d
  50
  51 # lld arm/aarch64/mips thunks
  52 / __[[:alnum:]]*Thunk_/d
  53
  54 # CFI type identifiers
  55 / __kcfi_typeid_/d
  56 / __kvm_nvhe___kcfi_typeid_/d
  57 / __pi___kcfi_typeid_/d
  58
  59 # CRC from modversions
  60 / __crc_/d
  61
  62 # EXPORT_SYMBOL (symbol name)
  63 / __kstrtab_/d
  64
  65 # EXPORT_SYMBOL (namespace)
  66 / __kstrtabns_/d
  67
  68 # ---------------------------------------------------------------------------
  69 # Ignored suffixes
  70 #  (do not forget '$' after each pattern)
  71
  72 # arm
  73 /_from_arm$/d
  74 /_from_thumb$/d
  75 /_veneer$/d
  76
  77 # ---------------------------------------------------------------------------
  78 # Ignored symbols (exact match)
  79 #  (do not forget a space before and '$' after each pattern)
  80
  81 # for LoongArch?
  82 / L0$/d
  83
  84 # ppc
  85 / _SDA_BASE_$/d
  86 / _SDA2_BASE_$/d
  87
  88 # ---------------------------------------------------------------------------
  89 # Ignored patterns
  90 #  (symbols that contain the pattern are ignored)
  91
  92 # ppc stub
  93 /\.long_branch\./d
  94 /\.plt_branch\./d
  95
  96 # ---------------------------------------------------------------------------
  97 # Ignored kallsyms symbols
  98 #
  99 # If the 3rd parameter exists, symbols from it will be omitted from the output.
 100 # This makes kallsyms have the identical symbol lists in the step 1 and 2.
 101 # Without this, the step2 would get new symbols generated by scripts/kallsyms.c
 102 # when CONFIG_KALLSYMS_ALL is enabled. That might require one more pass.
 103 $(if [ $# -ge 3 ]; then ${NM} ${3} | sed -n '/ U /!s:.* \([^ ]*\)$:/ \1$/d:p'; fi)
 104 "