scripts/modinfo-generate.py

   1 #!/usr/bin/env python3
   2 # -*- coding: utf-8 -*-
   3
   4 import os
   5 import sys
   6
   7 def print_array(name, values):
   8     if len(values) == 0:
   9         return
  10     list = ", ".join(values)
  11     print("    .%s = ((const char*[]){ %s, NULL })," % (name, list))
  12
  13 def parse_line(line):
  14     kind = ""
  15     data = ""
  16     get_kind = False
  17     get_data = False
  18     for item in line.split():
  19         if item == "MODINFO_START":
  20             get_kind = True
  21             continue
  22         if item.startswith("MODINFO_END"):
  23             get_data = False
  24             continue
  25         if get_kind:
  26             kind = item
  27             get_kind = False
  28             get_data = True
  29             continue
  30         if get_data:
  31             data += " " + item
  32             continue
  33     return (kind, data)
  34
  35 def generate(name, lines, enabled):
  36     arch = ""
  37     objs = []
  38     deps = []
  39     opts = []
  40     for line in lines:
  41         if line.find("MODINFO_START") != -1:
  42             (kind, data) = parse_line(line)
  43             if kind == 'obj':
  44                 objs.append(data)
  45             elif kind == 'dep':
  46                 deps.append(data)
  47             elif kind == 'opts':
  48                 opts.append(data)
  49             elif kind == 'arch':
  50                 arch = data;
  51             elif kind == 'kconfig':
  52                 # don't add a module which dependency is not enabled
  53                 # in kconfig
  54                 if data.strip() not in enabled:
  55                     print("    /* module {} isn't enabled in Kconfig. */"
  56                           .format(data.strip()))
  57                     print("/* },{ */")
  58                     return None
  59             else:
  60                 print("unknown:", kind)
  61                 exit(1)
  62
  63     print("    .name = \"%s\"," % name)
  64     if arch != "":
  65         print("    .arch = %s," % arch)
  66     print_array("objs", objs)
  67     print_array("deps", deps)
  68     print_array("opts", opts)
  69     print("},{")
  70     return {dep.strip('" ') for dep in deps}
  71
  72 def print_pre():
  73     print("/* generated by scripts/modinfo-generate.py */")
  74     print("#include \"qemu/osdep.h\"")
  75     print("#include \"qemu/module.h\"")
  76     print("const QemuModinfo qemu_modinfo[] = {{")
  77
  78 def print_post():
  79     print("    /* end of list */")
  80     print("}};")
  81
  82 def main(args):
  83     if len(args) < 3 or args[0] != '--devices':
  84         print('Expected: modinfo-generate.py --devices '
  85               'config-device.mak [modinfo files]', file=sys.stderr)
  86         exit(1)
  87
  88     # get all devices enabled in kconfig, from *-config-device.mak
  89     enabled = set()
  90     with open(args[1]) as file:
  91         for line in file.readlines():
  92             config = line.split('=')
  93             if config[1].rstrip() == 'y':
  94                 enabled.add(config[0][7:]) # remove CONFIG_
  95
  96     deps = set()
  97     modules = set()
  98     print_pre()
  99     for modinfo in args[2:]:
 100         with open(modinfo) as f:
 101             lines = f.readlines()
 102         print("    /* %s */" % modinfo)
 103         (basename, _) = os.path.splitext(modinfo)
 104         moddeps = generate(basename, lines, enabled)
 105         if moddeps is not None:
 106             modules.add(basename)
 107             deps.update(moddeps)
 108     print_post()
 109
 110     error = False
 111     for dep in deps.difference(modules):
 112         print("Dependency {} cannot be satisfied".format(dep),
 113               file=sys.stderr)
 114         error = True
 115
 116     if error:
 117         exit(1)
 118
 119 if __name__ == "__main__":
 120     main(sys.argv[1:])