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    arm64: move non-entry code out of .entry.text · ed84b4e9
    Mark Rutland 提交于
    Currently, cpu_switch_to and ret_from_fork both live in .entry.text,
    though neither form the critical path for an exception entry.
    
    In subsequent patches, we will require that code in .entry.text is part
    of the critical path for exception entry, for which we can assume
    certain properties (e.g. the presence of exception regs on the stack).
    
    Neither cpu_switch_to nor ret_from_fork will meet these requirements, so
    we must move them out of .entry.text. To ensure that neither are kprobed
    after being moved out of .entry.text, we must explicitly blacklist them,
    requiring a new NOKPROBE() asm helper.
    Signed-off-by: NMark Rutland <mark.rutland@arm.com>
    Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: James Morse <james.morse@arm.com>
    Cc: Will Deacon <will.deacon@arm.com>
    ed84b4e9
assembler.h 10.8 KB