This function returns the offset between the address barebox is linked at and the address barebox is currently running at. Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> --- arch/arm/include/asm/barebox-arm.h | 1 + arch/arm/lib/Makefile | 2 ++ arch/arm/lib/runtime-offset.S | 16 ++++++++++++++++ 3 files changed, 19 insertions(+) create mode 100644 arch/arm/lib/runtime-offset.S diff --git a/arch/arm/include/asm/barebox-arm.h b/arch/arm/include/asm/barebox-arm.h index b880dd4..3639365 100644 --- a/arch/arm/include/asm/barebox-arm.h +++ b/arch/arm/include/asm/barebox-arm.h @@ -42,5 +42,6 @@ extern char __ll_return[]; void board_init_lowlevel(void); void board_init_lowlevel_return(void); void arch_init_lowlevel(void); +uint32_t get_runtime_offset(void); #endif /* _BAREBOX_ARM_H_ */ diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index 9d0ff7a..2e624cd 100644 --- a/arch/arm/lib/Makefile +++ b/arch/arm/lib/Makefile @@ -16,6 +16,8 @@ obj-y += lib1funcs.o obj-y += ashrdi3.o obj-y += ashldi3.o obj-y += lshrdi3.o +obj-y += runtime-offset.o +pbl-y += runtime-offset.o obj-$(CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS) += memcpy.o obj-$(CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS) += memset.o obj-$(CONFIG_ARM_UNWIND) += unwind.o diff --git a/arch/arm/lib/runtime-offset.S b/arch/arm/lib/runtime-offset.S new file mode 100644 index 0000000..00d756d --- /dev/null +++ b/arch/arm/lib/runtime-offset.S @@ -0,0 +1,16 @@ +#include <linux/linkage.h> +#include <asm/assembler.h> + +/* + * Get the offset between the link address and the address + * we are currently running at. + */ +ENTRY(get_runtime_offset) +1: adr r0, 1b + ldr r1, linkadr + subs r0, r1, r0 + mov pc, lr + +linkadr: +.word get_runtime_offset +ENDPROC(get_runtime_offset) -- 1.7.10.4 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
