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Sam Ravnborg 2ea038917b Revert "kbuild: strip generated symbols from *.ko"

This reverts commit ad7a953c52.

And commit: ("allow stripping of generated symbols under CONFIG_KALLSYMS_ALL")
            9bb482476c

These stripping patches has caused a set of issues:

1) People have reported compatibility issues with binutils due to
   lack of support for `--strip-unneeded-symbols' with objcopy 2.15.92.0.2
   Reported by: Wenji
2) ccache and distcc no longer works as expeced
   Reported by: Ted, Roland, + others
3) The installed modules increased a lot in size
   Reported by: Ted, Davej + others

Reported-by: Wenji Huang <wenji.huang@oracle.com>
Reported-by: "Theodore Ts'o" <tytso@mit.edu>
Reported-by: Dave Jones <davej@redhat.com>
Reported-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

2009-01-14 21:38:20 +01:00

1.3 KiB

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#!/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

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])' > $2

1.3 KiB Raw Blame History

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

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).

1.3 KiB

Raw Blame History