Bonjour Albert,
On Wed, Sep 22, 2010 at 9:57 AM, Albert Aribaud albert.aribaud@free.fr wrote:
Add -msingle-pic-base to the relocation flags, and compute the pic base in start.S twice and for all -- once before relocation to run board_init_f, and once after relocation to run board_init_r and the rest of u-boot. This further reduces code size by 2.5% compared to -fPIE alone.
Signed-off-by: Albert Aribaud albert.aribaud@free.fr
I tried tested this on da850evm -- the da850evm.h has "#undef CONFIG_SYS_ARM_WITHOUT_RELOC /* This board is tested with relocation support */".
I never got a boot-prompt. I tried mucking with the patch a little and found that if I did:
diff --git a/arch/arm/cpu/arm926ejs/config.mk b/arch/arm/cpu/arm926ejs/config.mk index aa84706..f8ef90f 100644 --- a/arch/arm/cpu/arm926ejs/config.mk +++ b/arch/arm/cpu/arm926ejs/config.mk @@ -23,11 +23,6 @@
PLATFORM_RELFLAGS += -fno-common -ffixed-r8 -msoft-float
-ifndef CONFIG_SYS_ARM_WITHOUT_RELOC -# needed for optimal relocation -PLATFORM_RELFLAGS += -msingle-pic-base -endif - PLATFORM_CPPFLAGS += -march=armv5te # ========================================================================= #
Then I do get a prompt.
The gcc version here is: $arm-none-linux-gnueabi-gcc --version arm-none-linux-gnueabi-gcc (Sourcery G++ Lite 2009q1-203) 4.3.3 Copyright (C) 2008 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
I have a JTAG debugger for this board. Please let me know if there are register dumps or the like that I can get you.
Best Regards, Ben Gardiner
--- Nanometrics Inc. http://www.nanometrics.ca