Messages in this thread | | | Date | Thu, 1 Oct 2015 21:15:03 +0200 | From | Jesper Nilsson <> | Subject | Re: [PATCH v3] cris: arch-v10: kgdb: Add '__used' for static variable is_dyn_brkp |
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On Thu, Aug 06, 2015 at 12:34:53AM +0200, Chen Gang wrote: > Within one C file, current gcc can optimize the global static variables > according to the C code, but it will skip assembly code -- it will pass > them to gas directly. > > if the static variable is used between C code and assembly code in one C > file (e.g. is_dyn_brkp in kgdb.c), it needs '__used' to let gcc know it > should be still used, or gcc may remove it for optimization. > > The related error in this case: > > LD init/built-in.o > arch/cris/arch-v10/kernel/built-in.o: In function `kgdb_handle_breakpoint': > (.text+0x2aca): undefined reference to `is_dyn_brkp' > arch/cris/arch-v10/kernel/built-in.o: In function `is_static': > kgdb.c:(.text+0x2ada): undefined reference to `is_dyn_brkp' > > Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Added to the cris tree, thanks!
/^JN - Jesper Nilsson -- Jesper Nilsson -- jesper.nilsson@axis.com
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