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