Hello Peng,
On Wed, 21 Oct 2015 17:42:20 +0800, Peng Fan b51431@freescale.com wrote:
Hello Albert,
I do not know how to generate non-relocatable code only for the secure text. Since -mword-relocations and -pie are global flags, I do not know how to disable mword-relocations when compiling PSCI and other secure text.
Actually, I haven't even found a compiler or gcc option to entirely remove relocations altogether.
Is this ok for you?
diff --git a/arch/arm/cpu/u-boot.lds b/arch/arm/cpu/u-boot.lds index 65986e8..fb2128a 100644 --- a/arch/arm/cpu/u-boot.lds +++ b/arch/arm/cpu/u-boot.lds @@ -14,6 +14,7 @@ OUTPUT_ARCH(arm) ENTRY(_start) SECTIONS {
/DISCARD/ : { *(.rel._secure*) } . = 0x00000000; . = ALIGN(4);
Functionally, it works -- I've just checked it by comparing u-boot.map files of a mx7dsabresd build with and without the DISCARD. Not a single symbol from the text and data section gets changed.
The only missing thing left is a comment before the DISCARD line, explaining both why .rel._secure* input sections have to be discarded, and also explaining why this is done it right at the start of the output sections.
Thanks for your patience. :)
Regards, Peng.
Amicalement,