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         arch="$1"
  21
  22         header="$toolsdir/arch/$arch/include/uapi/asm/errno.h"
  23         if test -r "$header"; then
  24                 echo "$header"
  25         else
  26                 echo "$toolsdir/include/uapi/asm-generic/errno.h"
  27         fi
  28 }
  29
  30 create_errno_lookup_func()
  31 {
  32         arch=$(arch_string "$1")
  33
  34         printf "static const char *errno_to_name__%s(int err)\n{\n\tswitch (err) {\n" $arch
  35
  36         while read name nr; do
  37                 printf '\tcase %d: return "%s";\n' $nr $name
  38         done
  39
  40         printf '\tdefault: return "(unknown)";\n\t}\n}\n'
  41 }
  42
  43 process_arch()
  44 {
  45         arch="$1"
  46         asm_errno=$(asm_errno_file "$arch")
  47
  48         $gcc $CFLAGS $include_path -E -dM -x c $asm_errno \
  49                 |grep -hE '^#define[[:blank:]]+(E[^[:blank:]]+)[[:blank:]]+([[:digit:]]+).*' \
  50                 |awk '{ print $2","$3; }' \
  51                 |sort -t, -k2 -nu \
  52                 |IFS=, create_errno_lookup_func "$arch"
  53 }
  54
  55 create_arch_errno_table_func()
  56 {
  57         archlist="$1"
  58         default="$2"
  59
  60         printf 'arch_syscalls__strerrno_t *arch_syscalls__strerrno_function(const char *arch)\n'
  61         printf '{\n'
  62         for arch in $archlist; do
  63                 arch_str=$(arch_string "$arch")
  64                 printf '\tif (!strcmp(arch, "%s"))\n' "$arch_str"
  65                 printf '\t\treturn errno_to_name__%s;\n' "$arch_str"
  66         done
  67         arch_str=$(arch_string "$default")
  68         printf '\treturn errno_to_name__%s;\n' "$arch_str"
  69         printf '}\n'
  70 }
  71
  72 cat <<EoHEADER
  73 /* SPDX-License-Identifier: GPL-2.0 */
  74
  75 #include <string.h>
  76
  77 EoHEADER
  78
  79 # Create list of architectures that have a specific errno.h.
  80 archlist=""
  81 for f in $toolsdir/arch/*/include/uapi/asm/errno.h; do
  82         d=${f%/include/uapi/asm/errno.h}
  83         arch="${d##*/}"
  84         test -f $toolsdir/arch/$arch/include/uapi/asm/errno.h && archlist="$archlist $arch"
  85 done
  86
  87 for arch in generic $archlist; do
  88         process_arch "$arch"
  89 done
  90 create_arch_errno_table_func "$archlist" "generic"