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30 lines
904 B
30 lines
904 B
/* 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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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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