scripts/gensyscalls.sh

   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
   9 linux="$1"
  10 output="$2"
  11
  12 TMP=$(mktemp -d)
  13
  14 if [ "$linux" = "" ] ; then
  15     echo "Needs path to linux source tree" 1>&2
  16     exit 1
  17 fi
  18
  19 if [ "$output" = "" ] ; then
  20     output="$PWD"
  21 fi
  22
  23 upper()
  24 {
  25     echo "$1" | tr "[:lower:]" "[:upper:]" | tr "[:punct:]" "_"
  26 }
  27
  28 qemu_arch()
  29 {
  30     case "$1" in
  31     arm64)
  32         echo "aarch64"
  33         ;;
  34     *)
  35         echo "$1"
  36         ;;
  37     esac
  38 }
  39
  40 read_includes()
  41 {
  42     arch=$1
  43     bits=$2
  44
  45      cpp -P -nostdinc -fdirectives-only \
  46         -D_UAPI_ASM_$(upper ${arch})_BITSPERLONG_H \
  47         -D__BITS_PER_LONG=${bits} \
  48         -I${linux}/arch/${arch}/include/uapi/ \
  49         -I${linux}/include/uapi \
  50         -I${TMP} \
  51         "${linux}/arch/${arch}/include/uapi/asm/unistd.h"
  52 }
  53
  54 filter_defines()
  55 {
  56     grep -e "#define __NR_" -e "#define __NR3264"
  57 }
  58
  59 rename_defines()
  60 {
  61     sed "s/ __NR_/ TARGET_NR_/g;s/(__NR_/(TARGET_NR_/g"
  62 }
  63
  64 evaluate_values()
  65 {
  66     sed "s/#define TARGET_NR_/QEMU TARGET_NR_/" | \
  67     cpp -P -nostdinc | \
  68     sed "s/^QEMU /#define /"
  69 }
  70
  71 generate_syscall_nr()
  72 {
  73     arch=$1
  74     bits=$2
  75     file="$3"
  76     guard="$(upper LINUX_USER_$(qemu_arch $arch)_$(basename "$file"))"
  77
  78     (echo "/*"
  79     echo " * This file contains the system call numbers."
  80     echo " * Do not modify."
  81     echo " * This file is generated by scripts/gensyscalls.sh"
  82     echo " */"
  83     echo "#ifndef ${guard}"
  84     echo "#define ${guard}"
  85     echo
  86     read_includes $arch $bits | filter_defines | rename_defines | \
  87                                 evaluate_values | sort -n -k 3
  88     echo
  89     echo "#endif /* ${guard} */"
  90     echo) > "$file"
  91 }
  92
  93 mkdir "$TMP/asm"
  94 > "$TMP/asm/bitsperlong.h"
  95
  96 generate_syscall_nr arm64 64 "$output/linux-user/aarch64/syscall_nr.h"
  97 generate_syscall_nr nios2 32 "$output/linux-user/nios2/syscall_nr.h"
  98 generate_syscall_nr openrisc 32 "$output/linux-user/openrisc/syscall_nr.h"
  99
 100 generate_syscall_nr riscv 32 "$output/linux-user/riscv/syscall32_nr.h"
 101 generate_syscall_nr riscv 64 "$output/linux-user/riscv/syscall64_nr.h"
 102 rm -fr "$TMP"