90 lines
2.0 KiB
Bash
90 lines
2.0 KiB
Bash
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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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gcc="$1"
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toolsdir="$2"
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include_path="-I$toolsdir/include/uapi"
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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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asm_errno_file()
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{
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local arch="$1"
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local header
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header="$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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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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printf "static const char *errno_to_name__%s(int err)\n{\n\tswitch (err) {\n" $arch
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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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printf '\tdefault: return "(unknown)";\n\t}\n}\n'
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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 "$arch")
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$gcc $CFLAGS $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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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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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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cat <<EoHEADER
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/* SPDX-License-Identifier: GPL-2.0 */
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#include <string.h>
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EoHEADER
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# Create list of architectures that have a specific errno.h.
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archlist=""
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for arch in $(find $toolsdir/arch -maxdepth 1 -mindepth 1 -type d -printf "%f\n" | sort -r); do
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test -f $toolsdir/arch/$arch/include/uapi/asm/errno.h && archlist="$archlist $arch"
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done
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for arch in generic $archlist; do
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process_arch "$arch"
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done
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create_arch_errno_table_func "$archlist" "generic"
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