cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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arch_errno_names.sh (2049B)

      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
      9gcc="$1"
     10toolsdir="$2"
     11include_path="-I$toolsdir/include/uapi"
     12
     13arch_string()
     14{
     15	echo "$1" |sed -e 'y/- /__/' |tr '[[:upper:]]' '[[:lower:]]'
     16}
     17
     18asm_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
     31create_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
     45process_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
     57create_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
     73cat <<EoHEADER
     74/* SPDX-License-Identifier: GPL-2.0 */
     75
     76#include <string.h>
     77
     78EoHEADER
     79
     80# Create list of architectures that have a specific errno.h.
     81archlist=""
     82for 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"
     84done
     85
     86for arch in generic $archlist; do
     87	process_arch "$arch"
     88done
     89create_arch_errno_table_func "$archlist" "generic"