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    Subject[PATCH v10 09/11] x86/power/64: Adapt assembly for PIE support
    Date
    Change the assembly code to use only relative references of symbols for the
    kernel to be PIE compatible.

    Position Independent Executable (PIE) support will allow to extend the
    KASLR randomization range below 0xffffffff80000000.

    Signed-off-by: Thomas Garnier <thgarnie@chromium.org>
    Acked-by: Pavel Machek <pavel@ucw.cz>
    Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
    Reviewed-by: Kees Cook <keescook@chromium.org>
    ---
    arch/x86/power/hibernate_asm_64.S | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    diff --git a/arch/x86/power/hibernate_asm_64.S b/arch/x86/power/hibernate_asm_64.S
    index 7918b8415f13..977b8ae85045 100644
    --- a/arch/x86/power/hibernate_asm_64.S
    +++ b/arch/x86/power/hibernate_asm_64.S
    @@ -23,7 +23,7 @@
    #include <asm/frame.h>

    SYM_FUNC_START(swsusp_arch_suspend)
    - movq $saved_context, %rax
    + leaq saved_context(%rip), %rax
    movq %rsp, pt_regs_sp(%rax)
    movq %rbp, pt_regs_bp(%rax)
    movq %rsi, pt_regs_si(%rax)
    @@ -116,7 +116,7 @@ SYM_FUNC_START(restore_registers)
    movq %rax, %cr4; # turn PGE back on

    /* We don't restore %rax, it must be 0 anyway */
    - movq $saved_context, %rax
    + leaq saved_context(%rip), %rax
    movq pt_regs_sp(%rax), %rsp
    movq pt_regs_bp(%rax), %rbp
    movq pt_regs_si(%rax), %rsi
    --
    2.24.0.393.g34dc348eaf-goog
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