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x86/entry: Make some entry symbols global

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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>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220915111147.265598113@infradead.org
This commit is contained in:
Thomas Gleixner 2022-09-15 13:11:21 +02:00 committed by Peter Zijlstra
parent fe54d07937
commit c22cf380c7
1 changed files with 6 additions and 3 deletions
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9
arch/x86/entry/entry_64.S
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@ -327,7 +327,8 @@ 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
@ -906,7 +907,8 @@ 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
@ -1041,7 +1043,8 @@ 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