x86/32: Remove schedule_tail_wrapper()

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The unwinder expects a return address at the very top of the kernel
stack just below pt_regs and before any stack frame is created.  Instead
of calling a wrapper, set up a return address as if ret_from_fork()
was called from the syscall entry code.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Link: https://lkml.kernel.org/r/20230623225529.34590-2-brgerst@gmail.com

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Brian Gerst 2023-06-23 18:55:28 -04:00 • committed by Peter Zijlstra

parent 9831c6253a

commit 81f755d561

1 changed files with 10 additions and 23 deletions

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33

arch/x86/entry/entry_32.S

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