tools/perf/trace/beauty/arch_errno_names.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # Generate C file mapping errno codes to errno names.
   5 #
   6 # Copyright IBM Corp. 2018
   7 # Author(s):  Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
   8
   9 gcc="$1"
  10 toolsdir="$2"
  11 include_path="-I$toolsdir/include/uapi"
  12
  13 arch_string()
  14 {
  15         echo "$1" |sed -e 'y/- /__/' |tr '[[:upper:]]' '[[:lower:]]'
  16 }
  17
  18 asm_errno_file()
  19 {
  20         local arch="$1"
  21         local header
  22
  23         header="$toolsdir/arch/$arch/include/uapi/asm/errno.h"
  24         if test -r "$header"; then
  25                 echo "$header"
  26         else
  27                 echo "$toolsdir/include/uapi/asm-generic/errno.h"
  28         fi
  29 }
  30
  31 create_errno_lookup_func()
  32 {
  33         local arch=$(arch_string "$1")
  34         local nr name
  35
  36         cat <<EoFuncBegin
  37 static const char *errno_to_name__$arch(int err)
  38 {
  39         switch (err) {
  40 EoFuncBegin
  41
  42         while read name nr; do
  43                 printf '\tcase %d: return "%s";\n' $nr $name
  44         done
  45
  46         cat <<EoFuncEnd
  47         default:
  48                 return "(unknown)";
  49         }
  50 }
  51
  52 EoFuncEnd
  53 }
  54
  55 process_arch()
  56 {
  57         local arch="$1"
  58         local asm_errno=$(asm_errno_file "$arch")
  59
  60         $gcc $CFLAGS $include_path -E -dM -x c $asm_errno \
  61                 |grep -hE '^#define[[:blank:]]+(E[^[:blank:]]+)[[:blank:]]+([[:digit:]]+).*' \
  62                 |awk '{ print $2","$3; }' \
  63                 |sort -t, -k2 -nu \
  64                 |IFS=, create_errno_lookup_func "$arch"
  65 }
  66
  67 create_arch_errno_table_func()
  68 {
  69         local archlist="$1"
  70         local default="$2"
  71         local arch
  72
  73         printf 'const char *arch_syscalls__strerrno(const char *arch, int err)\n'
  74         printf '{\n'
  75         for arch in $archlist; do
  76                 printf '\tif (!strcmp(arch, "%s"))\n' $(arch_string "$arch")
  77                 printf '\t\treturn errno_to_name__%s(err);\n' $(arch_string "$arch")
  78         done
  79         printf '\treturn errno_to_name__%s(err);\n' $(arch_string "$default")
  80         printf '}\n'
  81 }
  82
  83 cat <<EoHEADER
  84 /* SPDX-License-Identifier: GPL-2.0 */
  85
  86 #include <string.h>
  87
  88 EoHEADER
  89
  90 # Create list of architectures and ignore those that do not appear
  91 # in tools/perf/arch
  92 archlist=""
  93 for arch in $(find $toolsdir/arch -maxdepth 1 -mindepth 1 -type d -printf "%f\n" | grep -v x86 | sort); do
  94         test -d $toolsdir/perf/arch/$arch && archlist="$archlist $arch"
  95 done
  96
  97 for arch in x86 $archlist generic; do
  98         process_arch "$arch"
  99 done
 100 create_arch_errno_table_func "x86 $archlist" "generic"