From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/powerpc/include/asm/extable.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 arch/powerpc/include/asm/extable.h (limited to 'arch/powerpc/include/asm/extable.h') diff --git a/arch/powerpc/include/asm/extable.h b/arch/powerpc/include/asm/extable.h new file mode 100644 index 000000000..eb91b2d29 --- /dev/null +++ b/arch/powerpc/include/asm/extable.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ARCH_POWERPC_EXTABLE_H +#define _ARCH_POWERPC_EXTABLE_H + +/* + * The exception table consists of pairs of relative addresses: the first is + * the address of an instruction that is allowed to fault, and the second is + * the address at which the program should continue. No registers are + * modified, so it is entirely up to the continuation code to figure out what + * to do. + * + * All the routines below use bits of fixup code that are out of line with the + * main instruction path. This means when everything is well, we don't even + * have to jump over them. Further, they do not intrude on our cache or tlb + * entries. + */ + +#define ARCH_HAS_RELATIVE_EXTABLE + +struct exception_table_entry { + int insn; + int fixup; +}; + +static inline unsigned long extable_fixup(const struct exception_table_entry *x) +{ + return (unsigned long)&x->fixup + x->fixup; +} + +#endif -- cgit v1.2.3