gcc-3.3.1-hammer breaks mm/memory.c
Hi all...
After some binary search and a 'couple' kernel builds, I narrowed the problem to mm/memory.c. With that file built at -O1:
CFLAGS_memory.o = -O1
The kernel boots, starts /sbin/init and looks like working normally (2.4.22-pre5).
Anybody can see what is miscompiled with an assembler listing ? Any #pragma to switch optmizations on the half of a file or for a function ?
TIA
Signature · 4 lines
J.A. Magallon <[email protected]> \ Software is like sex: werewolf.able.es \ It's better when it's free Mandrake Linux release 9.2 (Cooker) for i586 Linux 2.4.22-pre5 (gcc 3.3.1 (Mandrake Linux 9.2 3.3.1-0.2mdk))
Quoted 5 lines · J.A. Magallon
Hi all...
After some binary search and a 'couple' kernel builds, I narrowed the problem to
mm/memory.c. With that file built at -O1:
Quoted 9 lines
CFLAGS_memory.o = -O1
The kernel boots, starts
/sbin/initand looks like working normally (2.4.22-pre5).Anybody can see what is miscompiled with an assembler listing ? Any #pragma to switch optmizations on the half of a file or for a function ?
I finally got this: -O2 fails but
CFLAGS_memory.o = -Os -falign-functions -falign-jumps -falign-loops -falign-labels -fprefetch-loop-arrays -freorder-blocks
works.
Those are specific options disabled by -Os, but -Os does more things... (assembler output is very different)
Any SuSE site (hammer comes from SuSE, isn't it ?) to submit a decent bug report ?
TIA
Signature · 4 lines
J.A. Magallon <[email protected]> \ Software is like sex: werewolf.able.es \ It's better when it's free Mandrake Linux release 9.2 (Cooker) for i586 Linux 2.4.22-pre5-jam1m (gcc 3.3.1 (Mandrake Linux 9.2 3.3.1-0.2mdk))
Quoted 21 lines · J.A. Magallon
Quoted 5 lines · J.A. Magallon
Hi all...
After some binary search and a 'couple' kernel builds, I narrowed the problem to
mm/memory.c. With that file built at -O1:Quoted 9 lines
CFLAGS_memory.o = -O1
The kernel boots, starts
/sbin/initand looks like working normally (2.4.22-pre5).Anybody can see what is miscompiled with an assembler listing ? Any #pragma to switch optmizations on the half of a file or for a function ?
I finally got this: -O2 fails but
CFLAGS_memory.o = -Os -falign-functions -falign-jumps -falign-loops -falign-labels -fprefetch-loop-arrays -freorder-blocks
Quoted 7 lines
works.
Those are specific options disabled by -Os, but -Os does more things... (assembler output is very different)
Any SuSE site (hammer comes from SuSE, isn't it ?) to submit a decent bug report ?
[email protected] should be appropriate.
Andrea