183 lines
4.3 KiB
Bash
Executable File
183 lines
4.3 KiB
Bash
Executable File
#!/bin/sh
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
ATOMICDIR=$(dirname $0)
|
|
|
|
. ${ATOMICDIR}/atomic-tbl.sh
|
|
|
|
#gen_param_check(arg)
|
|
gen_param_check()
|
|
{
|
|
local arg="$1"; shift
|
|
local type="${arg%%:*}"
|
|
local name="$(gen_param_name "${arg}")"
|
|
local rw="write"
|
|
|
|
case "${type#c}" in
|
|
i) return;;
|
|
esac
|
|
|
|
# We don't write to constant parameters
|
|
[ ${type#c} != ${type} ] && rw="read"
|
|
|
|
printf "\tkasan_check_${rw}(${name}, sizeof(*${name}));\n"
|
|
}
|
|
|
|
#gen_param_check(arg...)
|
|
gen_params_checks()
|
|
{
|
|
while [ "$#" -gt 0 ]; do
|
|
gen_param_check "$1"
|
|
shift;
|
|
done
|
|
}
|
|
|
|
# gen_guard(meta, atomic, pfx, name, sfx, order)
|
|
gen_guard()
|
|
{
|
|
local meta="$1"; shift
|
|
local atomic="$1"; shift
|
|
local pfx="$1"; shift
|
|
local name="$1"; shift
|
|
local sfx="$1"; shift
|
|
local order="$1"; shift
|
|
|
|
local atomicname="arch_${atomic}_${pfx}${name}${sfx}${order}"
|
|
|
|
local template="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"
|
|
|
|
# We definitely need a preprocessor symbol for this atomic if it is an
|
|
# ordering variant, or if there's a generic fallback.
|
|
if [ ! -z "${order}" ] || [ ! -z "${template}" ]; then
|
|
printf "defined(${atomicname})"
|
|
return
|
|
fi
|
|
|
|
# If this is a base variant, but a relaxed variant *may* exist, then we
|
|
# only have a preprocessor symbol if the relaxed variant isn't defined
|
|
if meta_has_relaxed "${meta}"; then
|
|
printf "!defined(${atomicname}_relaxed) || defined(${atomicname})"
|
|
fi
|
|
}
|
|
|
|
#gen_proto_order_variant(meta, pfx, name, sfx, order, atomic, int, arg...)
|
|
gen_proto_order_variant()
|
|
{
|
|
local meta="$1"; shift
|
|
local pfx="$1"; shift
|
|
local name="$1"; shift
|
|
local sfx="$1"; shift
|
|
local order="$1"; shift
|
|
local atomic="$1"; shift
|
|
local int="$1"; shift
|
|
|
|
local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
|
|
|
|
local guard="$(gen_guard "${meta}" "${atomic}" "${pfx}" "${name}" "${sfx}" "${order}")"
|
|
|
|
local ret="$(gen_ret_type "${meta}" "${int}")"
|
|
local params="$(gen_params "${int}" "${atomic}" "$@")"
|
|
local checks="$(gen_params_checks "$@")"
|
|
local args="$(gen_args "$@")"
|
|
local retstmt="$(gen_ret_stmt "${meta}")"
|
|
|
|
[ ! -z "${guard}" ] && printf "#if ${guard}\n"
|
|
|
|
cat <<EOF
|
|
static inline ${ret}
|
|
${atomicname}(${params})
|
|
{
|
|
${checks}
|
|
${retstmt}arch_${atomicname}(${args});
|
|
}
|
|
#define ${atomicname} ${atomicname}
|
|
EOF
|
|
|
|
[ ! -z "${guard}" ] && printf "#endif\n"
|
|
|
|
printf "\n"
|
|
}
|
|
|
|
gen_xchg()
|
|
{
|
|
local xchg="$1"; shift
|
|
local mult="$1"; shift
|
|
|
|
cat <<EOF
|
|
#define ${xchg}(ptr, ...) \\
|
|
({ \\
|
|
typeof(ptr) __ai_ptr = (ptr); \\
|
|
kasan_check_write(__ai_ptr, ${mult}sizeof(*__ai_ptr)); \\
|
|
arch_${xchg}(__ai_ptr, __VA_ARGS__); \\
|
|
})
|
|
EOF
|
|
}
|
|
|
|
gen_optional_xchg()
|
|
{
|
|
local name="$1"; shift
|
|
local sfx="$1"; shift
|
|
local guard="defined(arch_${name}${sfx})"
|
|
|
|
[ -z "${sfx}" ] && guard="!defined(arch_${name}_relaxed) || defined(arch_${name})"
|
|
|
|
printf "#if ${guard}\n"
|
|
gen_xchg "${name}${sfx}" ""
|
|
printf "#endif\n\n"
|
|
}
|
|
|
|
cat << EOF
|
|
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
// Generated by $0
|
|
// DO NOT MODIFY THIS FILE DIRECTLY
|
|
|
|
/*
|
|
* This file provides wrappers with KASAN instrumentation for atomic operations.
|
|
* To use this functionality an arch's atomic.h file needs to define all
|
|
* atomic operations with arch_ prefix (e.g. arch_atomic_read()) and include
|
|
* this file at the end. This file provides atomic_read() that forwards to
|
|
* arch_atomic_read() for actual atomic operation.
|
|
* Note: if an arch atomic operation is implemented by means of other atomic
|
|
* operations (e.g. atomic_read()/atomic_cmpxchg() loop), then it needs to use
|
|
* arch_ variants (i.e. arch_atomic_read()/arch_atomic_cmpxchg()) to avoid
|
|
* double instrumentation.
|
|
*/
|
|
#ifndef _ASM_GENERIC_ATOMIC_INSTRUMENTED_H
|
|
#define _ASM_GENERIC_ATOMIC_INSTRUMENTED_H
|
|
|
|
#include <linux/build_bug.h>
|
|
#include <linux/kasan-checks.h>
|
|
|
|
EOF
|
|
|
|
grep '^[a-z]' "$1" | while read name meta args; do
|
|
gen_proto "${meta}" "${name}" "atomic" "int" ${args}
|
|
done
|
|
|
|
grep '^[a-z]' "$1" | while read name meta args; do
|
|
gen_proto "${meta}" "${name}" "atomic64" "s64" ${args}
|
|
done
|
|
|
|
for xchg in "xchg" "cmpxchg" "cmpxchg64"; do
|
|
for order in "" "_acquire" "_release" "_relaxed"; do
|
|
gen_optional_xchg "${xchg}" "${order}"
|
|
done
|
|
done
|
|
|
|
for xchg in "cmpxchg_local" "cmpxchg64_local" "sync_cmpxchg"; do
|
|
gen_xchg "${xchg}" ""
|
|
printf "\n"
|
|
done
|
|
|
|
gen_xchg "cmpxchg_double" "2 * "
|
|
|
|
printf "\n\n"
|
|
|
|
gen_xchg "cmpxchg_double_local" "2 * "
|
|
|
|
cat <<EOF
|
|
|
|
#endif /* _ASM_GENERIC_ATOMIC_INSTRUMENTED_H */
|
|
EOF
|