Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ARCH_POWERPC_EXTABLE_H
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#define _ARCH_POWERPC_EXTABLE_H
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/*
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* The exception table consists of pairs of relative addresses: the first is
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* the address of an instruction that is allowed to fault, and the second is
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* the address at which the program should continue. No registers are
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* modified, so it is entirely up to the continuation code to figure out what
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* to do.
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*
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* All the routines below use bits of fixup code that are out of line with the
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* main instruction path. This means when everything is well, we don't even
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* have to jump over them. Further, they do not intrude on our cache or tlb
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* entries.
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*/
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#define ARCH_HAS_RELATIVE_EXTABLE
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#ifndef __ASSEMBLER__
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struct exception_table_entry {
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int insn;
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int fixup;
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};
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static inline unsigned long extable_fixup(const struct exception_table_entry *x)
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{
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return (unsigned long)&x->fixup + x->fixup;
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}
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#endif
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/*
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* Helper macro for exception table entries
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*/
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#define EX_TABLE(_fault, _target) \
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stringify_in_c(.section __ex_table,"a";)\
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stringify_in_c(.balign 4;) \
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stringify_in_c(.long (_fault) - . ;) \
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stringify_in_c(.long (_target) - . ;) \
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stringify_in_c(.previous)
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#endif
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