1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3 4ATOMICDIR=$(dirname $0) 5 6. ${ATOMICDIR}/atomic-tbl.sh 7 8#gen_param_check(meta, arg) 9gen_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...) 34gen_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...) 53gen_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 "${meta}")" 70 71 gen_kerneldoc "" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "${atomic}" "${int}" "$@" 72 73cat <<EOF 74static __always_inline ${ret} 75${atomicname}(${params}) 76{ 77${checks} 78 ${retstmt}raw_${atomicname}(${args}); 79} 80EOF 81 82 printf "\n" 83} 84 85gen_xchg() 86{ 87 local xchg="$1"; shift 88 local order="$1"; shift 89 90 kcsan_barrier="" 91 if [ "${xchg%_local}" = "${xchg}" ]; then 92 case "$order" in 93 _release) kcsan_barrier="kcsan_release()" ;; 94 "") kcsan_barrier="kcsan_mb()" ;; 95 esac 96 fi 97 98 if [ "${xchg%${xchg#try_cmpxchg}}" = "try_cmpxchg" ] ; then 99 100cat <<EOF 101#define ${xchg}${order}(ptr, oldp, ...) \\ 102({ \\ 103 typeof(ptr) __ai_ptr = (ptr); \\ 104 typeof(oldp) __ai_oldp = (oldp); \\ 105EOF 106[ -n "$kcsan_barrier" ] && printf "\t${kcsan_barrier}; \\\\\n" 107cat <<EOF 108 instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \\ 109 instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \\ 110 raw_${xchg}${order}(__ai_ptr, __ai_oldp, __VA_ARGS__); \\ 111}) 112EOF 113 114 else 115 116cat <<EOF 117#define ${xchg}${order}(ptr, ...) \\ 118({ \\ 119 typeof(ptr) __ai_ptr = (ptr); \\ 120EOF 121[ -n "$kcsan_barrier" ] && printf "\t${kcsan_barrier}; \\\\\n" 122cat <<EOF 123 instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \\ 124 raw_${xchg}${order}(__ai_ptr, __VA_ARGS__); \\ 125}) 126EOF 127 128 fi 129} 130 131cat << EOF 132// SPDX-License-Identifier: GPL-2.0 133 134// Generated by $0 135// DO NOT MODIFY THIS FILE DIRECTLY 136 137/* 138 * This file provoides atomic operations with explicit instrumentation (e.g. 139 * KASAN, KCSAN), which should be used unless it is necessary to avoid 140 * instrumentation. Where it is necessary to aovid instrumenation, the 141 * raw_atomic*() operations should be used. 142 */ 143#ifndef _LINUX_ATOMIC_INSTRUMENTED_H 144#define _LINUX_ATOMIC_INSTRUMENTED_H 145 146#include <linux/build_bug.h> 147#include <linux/compiler.h> 148#include <linux/instrumented.h> 149 150EOF 151 152grep '^[a-z]' "$1" | while read name meta args; do 153 gen_proto "${meta}" "${name}" "atomic" "int" ${args} 154done 155 156grep '^[a-z]' "$1" | while read name meta args; do 157 gen_proto "${meta}" "${name}" "atomic64" "s64" ${args} 158done 159 160grep '^[a-z]' "$1" | while read name meta args; do 161 gen_proto "${meta}" "${name}" "atomic_long" "long" ${args} 162done 163 164 165for xchg in "xchg" "cmpxchg" "cmpxchg64" "cmpxchg128" "try_cmpxchg" "try_cmpxchg64" "try_cmpxchg128"; do 166 for order in "" "_acquire" "_release" "_relaxed"; do 167 gen_xchg "${xchg}" "${order}" 168 printf "\n" 169 done 170done 171 172for xchg in "cmpxchg_local" "cmpxchg64_local" "cmpxchg128_local" "sync_cmpxchg" "try_cmpxchg_local" "try_cmpxchg64_local" "try_cmpxchg128_local"; do 173 gen_xchg "${xchg}" "" 174 printf "\n" 175done 176 177cat <<EOF 178 179#endif /* _LINUX_ATOMIC_INSTRUMENTED_H */ 180EOF 181