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SubjectRe: [PATCH] blackfin: Makefile: Skip reloc overflow issue when COMPILE_TEST enabled
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Hi,

On Thu, Apr 9, 2015 at 5:03 AM, Chen Gang <xili_gchen_5257@hotmail.com> wrote:
> l1_text is at L1_CODE_START (e.g. for bf533, 0xff800000). If the kernel
> is too big, it may be overwritten, the related issue:
>
> LD init/built-in.o
> init/built-in.o: In function `do_early_param':
> init/main.c:(.init.text+0xe0): relocation truncated to fit: R_BFIN_PCREL24 against symbol `strcmp' defined in .l1.text section in arch/blackfin/lib/lib.a(strcmp.o)
> init/main.c:(.init.text+0x10e): relocation truncated to fit: R_BFIN_PCREL24 against symbol `strcmp' defined in .l1.text section in arch/blackfin/lib/lib.a(strcmp.o)
blackfin toolchain generate 24 bit pc-relative calls by default, with
a range of –16,777,216 through 16,777,214 (0xFF00 0000 to 0x00FF FFFE)
is available.
So call to l1_text should be ok. What do you mean the kernel is too big?
http://docs.blackfin.uclinux.org/doku.php?id=ism:call


> init/built-in.o: In function `unknown_bootoption':
>
> blackfin is for embedded system, the size limitition is acceptable, so
> it is not the real world issue, which should be skipped if COMPILE_TEST
> enabled.
>
>
> Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
> ---
> arch/blackfin/Makefile | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/arch/blackfin/Makefile b/arch/blackfin/Makefile
> index 2ece4e3..e5195b4 100644
> --- a/arch/blackfin/Makefile
> +++ b/arch/blackfin/Makefile
> @@ -20,6 +20,9 @@ endif
> KBUILD_AFLAGS += $(call cc-option,-mno-fdpic)
> KBUILD_CFLAGS_MODULE += -mlong-calls
> LDFLAGS += -m elf32bfin
> +ifeq ($(CONFIG_COMPILE_TEST),y)
> +LDFLAGS += --noinhibit-exec
> +endif
>
> KBUILD_DEFCONFIG := BF537-STAMP_defconfig
>
> --
> 1.9.3


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