[PATCH v3 1/4] arm64: add macros for common adrp usages

[Ard Biesheuvel]

On 4 March 2015 at 20:11, Ard Biesheuvel <ard.biesheuvel at linaro.org> wrote:
> The adrp instruction is mostly used in combination with either
> an add, a ldr or a str instruction with the low bits of the
> referenced symbol in the 12-bit immediate of the followup
> instruction.
>
> Introduce the macros adr_l, ldr_l and str_l that encapsulate
> these common patterns.
>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>
> ---
>  arch/arm64/include/asm/assembler.h | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
>
> diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
> index 750bac4e637e..14c30c58d101 100644
> --- a/arch/arm64/include/asm/assembler.h
> +++ b/arch/arm64/include/asm/assembler.h
> @@ -159,4 +159,24 @@ lr .req    x30             // link register
>         orr     \rd, \lbits, \hbits, lsl #32
>         .endm
>
> +       .macro  adr_l, dst, sym, tmp=
> +       .ifb    \tmp
> +       adrp    \dst, \sym
> +       add     \dst, \dst, :lo12:\sym
> +       .else
> +       adrp    \tmp, \sym
> +       add     \dst, \tmp, :lo12:\sym
> +       .endif
> +       .endm
> +
> +       .macro  ldr_l, dst, sym, tmp
> +       adrp    \tmp, \sym
> +       ldr     \dst, [\sym, :lo12:\sym]

Whoops ^^^

> +       .endm
> +
> +       .macro  str_l, src, sym, tmp
> +       adrp    \tmp, \sym
> +       str     \src, [\tmp, :lo12:\sym]
> +       .endm
> +
>  #endif /* __ASM_ASSEMBLER_H */
> --
> 1.8.3.2
>