2012/11/24 Zhi-zhou Zhang zhizhou.zh@gmail.com:
If bal is 8 bytes aligned, the _gp will not be 8 bytes aligned. then the following ld insntrustion generates a Adel exception. So here make _gp be always aligned in 8 bytes.
which toolchain do you use? Actually _gp is aligned to 16 bytes in the linker script. Thus the instruction "ld gp, 0(ra)" and the address loaded into gp is always aligned to 8 bytes. This works at least with ELDK-5.2.1 and a self-built gcc-4.7.2.
Signed-off-by: Zhi-zhou Zhang zhizhou.zh@gmail.com
arch/mips/cpu/mips64/start.S | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/mips/cpu/mips64/start.S b/arch/mips/cpu/mips64/start.S index 4112de7..8e8cc33 100644 --- a/arch/mips/cpu/mips64/start.S +++ b/arch/mips/cpu/mips64/start.S @@ -108,7 +108,10 @@ reset: mtc0 t0, CP0_CONFIG #endif
/* Initialize $gp */
/* Initialize $gp, _gp must be 8 bytes algined. */.align 3nopnop bal 1f nop .dword _gp-- 1.7.9.5