2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2018 The FreeBSD Foundation
6 * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
7 * under sponsorship from the FreeBSD Foundation.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 #ifdef SAN_NEEDS_INTERCEPTORS
36 #include <sys/param.h>
37 #include <sys/systm.h>
39 #include <machine/md_var.h>
40 #include <machine/specialreg.h>
41 #include <x86/ifunc.h>
43 int fubyte_nosmap(volatile const void *base);
44 int fubyte_smap(volatile const void *base);
45 DEFINE_IFUNC(, int, fubyte, (volatile const void *))
48 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
49 fubyte_smap : fubyte_nosmap);
52 int fuword16_nosmap(volatile const void *base);
53 int fuword16_smap(volatile const void *base);
54 DEFINE_IFUNC(, int, fuword16, (volatile const void *))
57 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
58 fuword16_smap : fuword16_nosmap);
61 int fueword_nosmap(volatile const void *base, long *val);
62 int fueword_smap(volatile const void *base, long *val);
63 DEFINE_IFUNC(, int, fueword, (volatile const void *, long *))
66 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
67 fueword_smap : fueword_nosmap);
69 DEFINE_IFUNC(, int, fueword64, (volatile const void *, int64_t *))
72 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
73 fueword_smap : fueword_nosmap);
76 int fueword32_nosmap(volatile const void *base, int32_t *val);
77 int fueword32_smap(volatile const void *base, int32_t *val);
78 DEFINE_IFUNC(, int, fueword32, (volatile const void *, int32_t *))
81 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
82 fueword32_smap : fueword32_nosmap);
85 int subyte_nosmap(volatile void *base, int byte);
86 int subyte_smap(volatile void *base, int byte);
87 DEFINE_IFUNC(, int, subyte, (volatile void *, int))
90 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
91 subyte_smap : subyte_nosmap);
94 int suword16_nosmap(volatile void *base, int word);
95 int suword16_smap(volatile void *base, int word);
96 DEFINE_IFUNC(, int, suword16, (volatile void *, int))
99 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
100 suword16_smap : suword16_nosmap);
103 int suword32_nosmap(volatile void *base, int32_t word);
104 int suword32_smap(volatile void *base, int32_t word);
105 DEFINE_IFUNC(, int, suword32, (volatile void *, int32_t))
108 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
109 suword32_smap : suword32_nosmap);
112 int suword_nosmap(volatile void *base, long word);
113 int suword_smap(volatile void *base, long word);
114 DEFINE_IFUNC(, int, suword, (volatile void *, long))
117 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
118 suword_smap : suword_nosmap);
120 DEFINE_IFUNC(, int, suword64, (volatile void *, int64_t))
123 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
124 suword_smap : suword_nosmap);
127 int casueword32_nosmap(volatile uint32_t *base, uint32_t oldval,
128 uint32_t *oldvalp, uint32_t newval);
129 int casueword32_smap(volatile uint32_t *base, uint32_t oldval,
130 uint32_t *oldvalp, uint32_t newval);
131 DEFINE_IFUNC(, int, casueword32, (volatile uint32_t *, uint32_t, uint32_t *,
135 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
136 casueword32_smap : casueword32_nosmap);
139 int casueword_nosmap(volatile u_long *p, u_long oldval, u_long *oldvalp,
141 int casueword_smap(volatile u_long *p, u_long oldval, u_long *oldvalp,
143 DEFINE_IFUNC(, int, casueword, (volatile u_long *, u_long, u_long *, u_long))
146 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
147 casueword_smap : casueword_nosmap);
150 int copyinstr_nosmap(const void *udaddr, void *kaddr, size_t len,
152 int copyinstr_smap(const void *udaddr, void *kaddr, size_t len,
154 DEFINE_IFUNC(, int, copyinstr, (const void *, void *, size_t, size_t *))
157 return ((cpu_stdext_feature & CPUID_STDEXT_SMAP) != 0 ?
158 copyinstr_smap : copyinstr_nosmap);
161 int copyin_nosmap_std(const void *udaddr, void *kaddr, size_t len);
162 int copyin_smap_std(const void *udaddr, void *kaddr, size_t len);
163 int copyin_nosmap_erms(const void *udaddr, void *kaddr, size_t len);
164 int copyin_smap_erms(const void *udaddr, void *kaddr, size_t len);
165 DEFINE_IFUNC(, int, copyin, (const void *, void *, size_t))
168 switch (cpu_stdext_feature & (CPUID_STDEXT_SMAP | CPUID_STDEXT_ERMS)) {
169 case CPUID_STDEXT_SMAP:
170 return (copyin_smap_std);
171 case CPUID_STDEXT_ERMS:
172 return (copyin_nosmap_erms);
173 case CPUID_STDEXT_SMAP | CPUID_STDEXT_ERMS:
174 return (copyin_smap_erms);
176 return (copyin_nosmap_std);
180 int copyout_nosmap_std(const void *kaddr, void *udaddr, size_t len);
181 int copyout_smap_std(const void *kaddr, void *udaddr, size_t len);
182 int copyout_nosmap_erms(const void *kaddr, void *udaddr, size_t len);
183 int copyout_smap_erms(const void *kaddr, void *udaddr, size_t len);
184 DEFINE_IFUNC(, int, copyout, (const void *, void *, size_t))
187 switch (cpu_stdext_feature & (CPUID_STDEXT_SMAP | CPUID_STDEXT_ERMS)) {
188 case CPUID_STDEXT_SMAP:
189 return (copyout_smap_std);
190 case CPUID_STDEXT_ERMS:
191 return (copyout_nosmap_erms);
192 case CPUID_STDEXT_SMAP | CPUID_STDEXT_ERMS:
193 return (copyout_smap_erms);
195 return (copyout_nosmap_std);