------- Comment #3 from jan dot kratochvil at redhat dot com 2010-07-23 11:11
-------
(In reply to comment #1)
> const int i; -fno-zero-initialized-in-bss -> .bss = FAIL
> You need -fno-common also to get it out of the BSS.
-fno-common now at least correctly reports:
echo 'const int i;'|gcc -fno-common -c -o k.o -x c -;echo 'const int
i;main(){}'|gcc -fno-common -c -o l.o -x c -;gcc -fno-common -o k k.o l.o
l.o:(.bss+0x0): multiple definition of `i'
k.o:(.bss+0x0): first defined here
So it is no longer SHN_COMMON, thanks.
But reopening the Bug as it is still in .bss, not in .rodata.
echo 'const int i;int main(){return *(int *)&i = 0;}'|gcc -fno-common -Wall -o
1 -x c -;./1;echo $?
0
[25] .bss NOBITS 0000000000600818 00000814
0000000000000018 0000000000000000 WA 0 0 8
Num: Value Size Type Bind Vis Ndx Name
55: 0000000000600828 4 OBJECT GLOBAL DEFAULT 25 i
It should SEGV but it does not.
-f{,no-}zero-initialized-in-bss has no effect on it.
--
jan dot kratochvil at redhat dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
Resolution|INVALID |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44690
