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aa497d4352
The setjmp function should be declared as "returns_twice", or bad things can happen[1]. This does not actually change generated code in my testing. The longjmp function should be declared as "noreturn", so that the compiler can optimise calls to it better. This makes the generated code a little shorter. 1: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-returns_005ftwice-function-attribute Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/c02ce4a573f3bac907e2c70957a2d1275f910013.1567605586.git.segher@kernel.crashing.org
13 lines
352 B
C
13 lines
352 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright © 2008 Michael Neuling IBM Corporation
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*/
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#ifndef _ASM_POWERPC_SETJMP_H
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#define _ASM_POWERPC_SETJMP_H
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#define JMP_BUF_LEN 23
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extern long setjmp(long *) __attribute__((returns_twice));
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extern void longjmp(long *, long) __attribute__((noreturn));
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#endif /* _ASM_POWERPC_SETJMP_H */
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