lkml.org 
[lkml]   [2022]   [Jul]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[patch 21/38] x86/entry: Make some entry symbols global
    Date
    paranoid_entry(), error_entry() and xen_error_entry() have to be
    exempted from call accounting by thunk patching because they are
    before UNTRAIN_RET.

    Expose them so they are available in the alternative code.

    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    ---
    arch/x86/entry/entry_64.S | 9 ++++++---
    1 file changed, 6 insertions(+), 3 deletions(-)

    --- a/arch/x86/entry/entry_64.S
    +++ b/arch/x86/entry/entry_64.S
    @@ -326,7 +326,8 @@ SYM_CODE_END(ret_from_fork)
    #endif
    .endm

    -SYM_CODE_START_LOCAL(xen_error_entry)
    +SYM_CODE_START(xen_error_entry)
    + ANNOTATE_NOENDBR
    UNWIND_HINT_FUNC
    PUSH_AND_CLEAR_REGS save_ret=1
    ENCODE_FRAME_POINTER 8
    @@ -904,7 +905,8 @@ SYM_CODE_END(xen_failsafe_callback)
    * R14 - old CR3
    * R15 - old SPEC_CTRL
    */
    -SYM_CODE_START_LOCAL(paranoid_entry)
    +SYM_CODE_START(paranoid_entry)
    + ANNOTATE_NOENDBR
    UNWIND_HINT_FUNC
    PUSH_AND_CLEAR_REGS save_ret=1
    ENCODE_FRAME_POINTER 8
    @@ -1039,7 +1041,8 @@ SYM_CODE_END(paranoid_exit)
    /*
    * Switch GS and CR3 if needed.
    */
    -SYM_CODE_START_LOCAL(error_entry)
    +SYM_CODE_START(error_entry)
    + ANNOTATE_NOENDBR
    UNWIND_HINT_FUNC

    PUSH_AND_CLEAR_REGS save_ret=1
    \
     
     \ /
      Last update: 2022-07-17 01:19    [W:10.610 / U:0.004 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site