[mirror_ubuntu-bionic-kernel.git] / scripts / mksysmap

#!/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'. __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 '\( [aNUw] \)\|\(__crc_\)\|\( \$[adt]\)\|\( .L\)' > $2
Commit	Line	Data
1da177e4 LT	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
943ffb58	4	# tools to retrieve the actual addresses of symbols in the kernel.
1da177e4 LT	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)
4fec5420	19	# C = Common symbol
1da177e4 LT	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
aab34ac8	35	# N - debugging symbols
1da177e4 LT	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',
2ea03891 SR	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).
	43
00902e98	44	$NM -n $1 \| grep -v '\( [aNUw] \)\\|\(__crc_\)\\|\( \$[adt]\)\\|\( .L\)' > $2