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Update x86/ifunc.h.

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Remove ifunc emulation.
Add helper for usermode ifunc resolver definition.
Update copyright years.

Sponsored by:	The FreeBSD Foundation
Approved by:	re (rgrimes)
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2018-09-30 16:57:30 +00:00
parent 8184648425
commit 632227a739
1 changed files with 12 additions and 20 deletions
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32
sys/x86/include/ifunc.h
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@ -1,5 +1,5 @@
/*-
* Copyright (c) 2015, 2017 The FreeBSD Foundation
* Copyright (c) 2015-2018 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
@ -32,27 +32,19 @@
#ifndef __X86_IFUNC_H
#define __X86_IFUNC_H
#define DECLARE_LIFUNC(ret_type, name, args) \
ret_type name args
#define DEFINE_LIFUNC(scope, selector_qual, ret_type, name, args) \
__asm__ (scope "\t" #name "\n" \
"\t.type\t" #name ",@function\n" \
#name ":\n" \
"\tjmp *" #name "_selector\n" \
"\t.size\t" #name ",\t. - "#name); \
selector_qual ret_type (*name##_selector)args __used; \
DECLARE_LIFUNC(ret_type, name, args)
#define DEFINE_STATIC_LIFUNC(ret_type, name, args) \
DEFINE_LIFUNC(".local", static, ret_type, name, args)
#define DEFINE_GLOBAL_LIFUNC(ret_type, name, args) \
DEFINE_LIFUNC(".globl", , ret_type, name, args)
#define DEFINE_IFUNC(qual, ret_type, name, args, resolver_qual) \
#define DEFINE_IFUNC(qual, ret_type, name, args, resolver_qual) \
resolver_qual ret_type (*name##_resolver(void))args __used; \
qual ret_type name args __attribute__((ifunc(#name "_resolver"))); \
resolver_qual ret_type (*name##_resolver(void))args
#define DEFINE_UIFUNC(qual, ret_type, name, args, resolver_qual) \
resolver_qual ret_type (*name##_resolver(uint32_t, uint32_t, \
uint32_t, uint32_t))args __used; \
qual ret_type name args __attribute__((ifunc(#name "_resolver"))); \
resolver_qual ret_type (*name##_resolver( \
uint32_t cpu_feature __unused, \
uint32_t cpu_feature2 __unused, \
uint32_t cpu_stdext_feature __unused, \
uint32_t cpu_stdext_feature2 __unused))args
#endif