• Stefan Agner's avatar
    arm: build arch memset/memcpy in Thumb2 mode · 75d7a0d7
    Stefan Agner authored
    Resynchronize memcpy/memset with kernel 3.17 and build them in
    Thumb2 mode (unified syntax). Those assembler files can be built
    and linked in ARM mode too, however when calling them from Thumb2
    built code, the stack got corrupted and the copy did not succeed
    (the exact details have not been traced back). However, the Linux
    kernel builds those files in Thumb2 mode. Hence U-Boot should
    build them in Thumb2 mode too when CONFIG_SYS_THUMB_BUILD is set.
    To build the files without warning, some assembler instructions
    had to be replaced with their UAL compliant variant (thanks
    Jeroen for this input).
    To build the file in Thumb2 mode the implicit-it=always option need
    to be set to generate Thumb2 compliant IT instructions where needed.
    We add this option to the general AFLAGS when building for Thumb2.
    Reviewed-by: default avatarSimon Glass <sjg@chromium.org>
    Tested-by: default avatarSimon Glass <sjg@chromium.org>
    Signed-off-by: default avatarStefan Agner <stefan@agner.ch>
assembler.h 2.01 KB