Alpha Linux kernel fails with inconsistent kallsyms data

The build of the Alpha Linux kernel currently fails[1] with inconsistent
kallsyms data.  As I never saw that before, I thought about hardware
problems.  But in fact it is a bug in the Linux kernel.

The end of the rodata section is marked with the "__end_rodata" symbol.
This symbol have different aligning constraints than the inittext parts
and therefor the start marked "_sinittext".  Because of that the
__end_rodata symbol shifts between < _sinittext and == _sinittext.  The
later variant is seen as a code symbol and recorded in the kallsyms data.

On fix would be to move the exception table a little bit and get some
space between that two areas.

[1]: http://buildd.debian.org/fetch.cgi?pkg=linux-2.6&arch=alpha&ver=2.6.25-5&stamp=1213919009&file=log&as=raw

Cc: maximilian attems <max@stro.at>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Bastian Blank 2008-07-04 10:00:00 -07:00 коммит произвёл Linus Torvalds
Родитель 1209726ce9
Коммит 51597acfd3
1 изменённых файлов: 7 добавлений и 7 удалений

Просмотреть файл

@ -25,6 +25,13 @@ SECTIONS
} :kernel
_etext = .; /* End of text section */
NOTES :kernel :note
.dummy : {
*(.dummy)
} :kernel
RODATA
/* Exception table */
. = ALIGN(16);
__ex_table : {
@ -33,13 +40,6 @@ SECTIONS
__stop___ex_table = .;
}
NOTES :kernel :note
.dummy : {
*(.dummy)
} :kernel
RODATA
/* Will be freed after init */
. = ALIGN(PAGE_SIZE);
/* Init code and data */