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s390: add type checking to CALL_ON_STACK_NORETURN() macro

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Make sure the to be called function takes no arguments (and returns void).
Otherwise usage of CALL_ON_STACK_NORETURN() would generate broken code.

Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2021-07-05 17:53:42 +02:00 committed by Vasily Gorbik
parent 60a4813c47
commit a9b660849f
1 changed files with 3 additions and 1 deletions
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4
arch/s390/include/asm/stacktrace.h
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@ -191,12 +191,14 @@ struct stack_frame {
#define CALL_ON_STACK_NORETURN(fn, stack) \
({ \
void (*__fn)(void) = fn; \
\
asm volatile( \
" la 15,0(%[_stack])\n" \
" xc %[_bc](8,15),%[_bc](15)\n" \
" brasl 14,%[_fn]\n" \
::[_bc] "i" (offsetof(struct stack_frame, back_chain)), \
[_stack] "a" (stack), [_fn] "X" (fn)); \
[_stack] "a" (stack), [_fn] "X" (__fn)); \
BUG(); \
})