xref: /openbmc/qemu/scripts/gensyscalls.sh (revision 4921d0a7) 
1#!/bin/sh
2#
3# Update syscall_nr.h files from linux headers asm-generic/unistd.h
4#
5# This code is licensed under the GPL version 2 or later.  See
6# the COPYING file in the top-level directory.
7#
8
9linux="$1"
10output="$2"
11
12TMP=$(mktemp -d)
13
14if [ "$linux" = "" ] ; then
15    echo "Needs path to linux source tree" 1>&2
16    exit 1
17fi
18
19if [ "$output" = "" ] ; then
20    output="$PWD"
21fi
22
23upper()
24{
25    echo "$1" | tr "[:lower:]" "[:upper:]" | tr "[:punct:]" "_"
26}
27
28qemu_arch()
29{
30    case "$1" in
31    arm64)
32        echo "aarch64"
33        ;;
34    *)
35        echo "$1"
36        ;;
37    esac
38}
39
40read_includes()
41{
42    arch=$1
43    bits=$2
44
45     cpp -P -nostdinc -fdirectives-only \
46        -D_UAPI_ASM_$(upper ${arch})_BITSPERLONG_H \
47        -D__ASM_$(upper ${arch})_BITSPERLONG_H \
48        -D__BITS_PER_LONG=${bits} \
49        -I${linux}/arch/${arch}/include/uapi/ \
50        -I${linux}/include/uapi \
51        -I${TMP} \
52        "${linux}/arch/${arch}/include/uapi/asm/unistd.h"
53}
54
55filter_defines()
56{
57    grep -e "#define __NR_" -e "#define __NR3264"
58}
59
60rename_defines()
61{
62    sed "s/ __NR_/ TARGET_NR_/g;s/(__NR_/(TARGET_NR_/g"
63}
64
65evaluate_values()
66{
67    sed "s/#define TARGET_NR_/QEMU TARGET_NR_/" | \
68    cpp -P -nostdinc | \
69    sed "s/^QEMU /#define /"
70}
71
72generate_syscall_nr()
73{
74    arch=$1
75    bits=$2
76    file="$3"
77    guard="$(upper LINUX_USER_$(qemu_arch $arch)_$(basename "$file"))"
78
79    (echo "/*"
80    echo " * This file contains the system call numbers."
81    echo " * Do not modify."
82    echo " * This file is generated by scripts/gensyscalls.sh"
83    echo " */"
84    echo "#ifndef ${guard}"
85    echo "#define ${guard}"
86    echo
87    read_includes $arch $bits | filter_defines | rename_defines | \
88                                evaluate_values | sort -n -k 3
89    echo
90    echo "#endif /* ${guard} */") > "$file"
91}
92
93mkdir "$TMP/asm"
94> "$TMP/asm/bitsperlong.h"
95
96generate_syscall_nr arm64 64 "$output/linux-user/aarch64/syscall_nr.h"
97generate_syscall_nr openrisc 32 "$output/linux-user/openrisc/syscall_nr.h"
98
99generate_syscall_nr riscv 32 "$output/linux-user/riscv/syscall32_nr.h"
100generate_syscall_nr riscv 64 "$output/linux-user/riscv/syscall64_nr.h"
101generate_syscall_nr hexagon 32 "$output/linux-user/hexagon/syscall_nr.h"
102generate_syscall_nr loongarch 64 "$output/linux-user/loongarch64/syscall_nr.h"
103rm -fr "$TMP"
104