Merge tag 'sound-5.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
[platform/kernel/linux-starfive.git] / scripts / atomic / gen-atomic-instrumented.sh
1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0
3
4 ATOMICDIR=$(dirname $0)
5
6 . ${ATOMICDIR}/atomic-tbl.sh
7
8 #gen_param_check(meta, arg)
9 gen_param_check()
10 {
11         local meta="$1"; shift
12         local arg="$1"; shift
13         local type="${arg%%:*}"
14         local name="$(gen_param_name "${arg}")"
15         local rw="write"
16
17         case "${type#c}" in
18         i) return;;
19         esac
20
21         if [ ${type#c} != ${type} ]; then
22                 # We don't write to constant parameters.
23                 rw="read"
24         elif [ "${meta}" != "s" ]; then
25                 # An atomic RMW: if this parameter is not a constant, and this atomic is
26                 # not just a 's'tore, this parameter is both read from and written to.
27                 rw="read_write"
28         fi
29
30         printf "\tinstrument_atomic_${rw}(${name}, sizeof(*${name}));\n"
31 }
32
33 #gen_params_checks(meta, arg...)
34 gen_params_checks()
35 {
36         local meta="$1"; shift
37         local order="$1"; shift
38
39         if [ "${order}" = "_release" ]; then
40                 printf "\tkcsan_release();\n"
41         elif [ -z "${order}" ] && ! meta_in "$meta" "slv"; then
42                 # RMW with return value is fully ordered
43                 printf "\tkcsan_mb();\n"
44         fi
45
46         while [ "$#" -gt 0 ]; do
47                 gen_param_check "$meta" "$1"
48                 shift;
49         done
50 }
51
52 #gen_proto_order_variant(meta, pfx, name, sfx, order, atomic, int, arg...)
53 gen_proto_order_variant()
54 {
55         local meta="$1"; shift
56         local pfx="$1"; shift
57         local name="$1"; shift
58         local sfx="$1"; shift
59         local order="$1"; shift
60         local atomic="$1"; shift
61         local int="$1"; shift
62
63         local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
64
65         local ret="$(gen_ret_type "${meta}" "${int}")"
66         local params="$(gen_params "${int}" "${atomic}" "$@")"
67         local checks="$(gen_params_checks "${meta}" "${order}" "$@")"
68         local args="$(gen_args "$@")"
69         local retstmt="$(gen_ret_stmt "${meta}")"
70
71 cat <<EOF
72 static __always_inline ${ret}
73 ${atomicname}(${params})
74 {
75 ${checks}
76         ${retstmt}arch_${atomicname}(${args});
77 }
78 EOF
79
80         printf "\n"
81 }
82
83 gen_xchg()
84 {
85         local xchg="$1"; shift
86         local order="$1"; shift
87         local mult="$1"; shift
88
89         kcsan_barrier=""
90         if [ "${xchg%_local}" = "${xchg}" ]; then
91                 case "$order" in
92                 _release)       kcsan_barrier="kcsan_release()" ;;
93                 "")                     kcsan_barrier="kcsan_mb()" ;;
94                 esac
95         fi
96
97         if [ "${xchg%${xchg#try_cmpxchg}}" = "try_cmpxchg" ] ; then
98
99 cat <<EOF
100 #define ${xchg}${order}(ptr, oldp, ...) \\
101 ({ \\
102         typeof(ptr) __ai_ptr = (ptr); \\
103         typeof(oldp) __ai_oldp = (oldp); \\
104 EOF
105 [ -n "$kcsan_barrier" ] && printf "\t${kcsan_barrier}; \\\\\n"
106 cat <<EOF
107         instrument_atomic_write(__ai_ptr, ${mult}sizeof(*__ai_ptr)); \\
108         instrument_atomic_write(__ai_oldp, ${mult}sizeof(*__ai_oldp)); \\
109         arch_${xchg}${order}(__ai_ptr, __ai_oldp, __VA_ARGS__); \\
110 })
111 EOF
112
113         else
114
115 cat <<EOF
116 #define ${xchg}${order}(ptr, ...) \\
117 ({ \\
118         typeof(ptr) __ai_ptr = (ptr); \\
119 EOF
120 [ -n "$kcsan_barrier" ] && printf "\t${kcsan_barrier}; \\\\\n"
121 cat <<EOF
122         instrument_atomic_write(__ai_ptr, ${mult}sizeof(*__ai_ptr)); \\
123         arch_${xchg}${order}(__ai_ptr, __VA_ARGS__); \\
124 })
125 EOF
126
127         fi
128 }
129
130 cat << EOF
131 // SPDX-License-Identifier: GPL-2.0
132
133 // Generated by $0
134 // DO NOT MODIFY THIS FILE DIRECTLY
135
136 /*
137  * This file provides wrappers with KASAN instrumentation for atomic operations.
138  * To use this functionality an arch's atomic.h file needs to define all
139  * atomic operations with arch_ prefix (e.g. arch_atomic_read()) and include
140  * this file at the end. This file provides atomic_read() that forwards to
141  * arch_atomic_read() for actual atomic operation.
142  * Note: if an arch atomic operation is implemented by means of other atomic
143  * operations (e.g. atomic_read()/atomic_cmpxchg() loop), then it needs to use
144  * arch_ variants (i.e. arch_atomic_read()/arch_atomic_cmpxchg()) to avoid
145  * double instrumentation.
146  */
147 #ifndef _LINUX_ATOMIC_INSTRUMENTED_H
148 #define _LINUX_ATOMIC_INSTRUMENTED_H
149
150 #include <linux/build_bug.h>
151 #include <linux/compiler.h>
152 #include <linux/instrumented.h>
153
154 EOF
155
156 grep '^[a-z]' "$1" | while read name meta args; do
157         gen_proto "${meta}" "${name}" "atomic" "int" ${args}
158 done
159
160 grep '^[a-z]' "$1" | while read name meta args; do
161         gen_proto "${meta}" "${name}" "atomic64" "s64" ${args}
162 done
163
164 grep '^[a-z]' "$1" | while read name meta args; do
165         gen_proto "${meta}" "${name}" "atomic_long" "long" ${args}
166 done
167
168
169 for xchg in "xchg" "cmpxchg" "cmpxchg64" "try_cmpxchg" "try_cmpxchg64"; do
170         for order in "" "_acquire" "_release" "_relaxed"; do
171                 gen_xchg "${xchg}" "${order}" ""
172                 printf "\n"
173         done
174 done
175
176 for xchg in "cmpxchg_local" "cmpxchg64_local" "sync_cmpxchg"; do
177         gen_xchg "${xchg}" "" ""
178         printf "\n"
179 done
180
181 gen_xchg "cmpxchg_double" "" "2 * "
182
183 printf "\n\n"
184
185 gen_xchg "cmpxchg_double_local" "" "2 * "
186
187 cat <<EOF
188
189 #endif /* _LINUX_ATOMIC_INSTRUMENTED_H */
190 EOF