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@@ -0,0 +1,100 @@
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+#!/bin/sh
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+# SPDX-License-Identifier: GPL-2.0
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+#
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+# Generate C file mapping errno codes to errno names.
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+#
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+# Copyright IBM Corp. 2018
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+# Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
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+
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+gcc="$1"
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+toolsdir="$2"
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+include_path="-I$toolsdir/include/uapi"
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+
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+arch_string()
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+{
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+ echo "$1" |sed -e 'y/- /__/' |tr '[[:upper:]]' '[[:lower:]]'
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+}
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+
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+asm_errno_file()
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+{
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+ local arch="$1"
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+ local header
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+
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+ header="$toolsdir/arch/$arch/include/uapi/asm/errno.h"
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+ if test -r "$header"; then
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+ echo "$header"
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+ else
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+ echo "$toolsdir/include/uapi/asm-generic/errno.h"
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+ fi
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+}
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+
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+create_errno_lookup_func()
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+{
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+ local arch=$(arch_string "$1")
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+ local nr name
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+
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+ cat <<EoFuncBegin
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+static const char *errno_to_name__$arch(int err)
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+{
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+ switch (err) {
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+EoFuncBegin
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+
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+ while read name nr; do
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+ printf '\tcase %d: return "%s";\n' $nr $name
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+ done
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+
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+ cat <<EoFuncEnd
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+ default:
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+ return "(unknown)";
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+ }
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+}
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+
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+EoFuncEnd
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+}
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+
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+process_arch()
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+{
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+ local arch="$1"
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+ local asm_errno=$(asm_errno_file "$arch")
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+
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+ $gcc $include_path -E -dM -x c $asm_errno \
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+ |grep -hE '^#define[[:blank:]]+(E[^[:blank:]]+)[[:blank:]]+([[:digit:]]+).*' \
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+ |awk '{ print $2","$3; }' \
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+ |sort -t, -k2 -nu \
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+ |IFS=, create_errno_lookup_func "$arch"
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+}
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+
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+create_arch_errno_table_func()
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+{
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+ local archlist="$1"
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+ local default="$2"
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+ local arch
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+
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+ printf 'const char *arch_syscalls__strerrno(const char *arch, int err)\n'
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+ printf '{\n'
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+ for arch in $archlist; do
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+ printf '\tif (!strcmp(arch, "%s"))\n' $(arch_string "$arch")
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+ printf '\t\treturn errno_to_name__%s(err);\n' $(arch_string "$arch")
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+ done
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+ printf '\treturn errno_to_name__%s(err);\n' $(arch_string "$default")
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+ printf '}\n'
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+}
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+
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+cat <<EoHEADER
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+/* SPDX-License-Identifier: GPL-2.0 */
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+
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+#include <string.h>
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+
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+EoHEADER
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+
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+# Create list of architectures and ignore those that do not appear
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+# in tools/perf/arch
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+archlist=""
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+for arch in $(find $toolsdir/arch -maxdepth 1 -mindepth 1 -type d -printf "%f\n" | grep -v x86 | sort); do
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+ test -d arch/$arch && archlist="$archlist $arch"
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+done
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+
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+for arch in x86 $archlist generic; do
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+ process_arch "$arch"
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+done
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+create_arch_errno_table_func "x86 $archlist" "generic"
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Hendrik Brueckner