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99 lines
2.0 KiB
99 lines
2.0 KiB
#!/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 <[email protected]> |
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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 "$1") |
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local nr name |
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cat <<EoFuncBegin |
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static const char *errno_to_name__$arch(int err) |
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{ |
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switch (err) { |
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EoFuncBegin |
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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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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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EoFuncEnd |
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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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