| 1 | #!/usr/bin/env python
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| 2 | #
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| 3 | # Copyright (c) 2014 Jakub Jermar
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| 4 | # All rights reserved.
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| 5 | #
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| 6 | # Redistribution and use in source and binary forms, with or without
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| 7 | # modification, are permitted provided that the following conditions
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| 8 | # are met:
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| 9 | #
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| 10 | # - Redistributions of source code must retain the above copyright
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| 11 | # notice, this list of conditions and the following disclaimer.
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| 12 | # - Redistributions in binary form must reproduce the above copyright
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| 13 | # notice, this list of conditions and the following disclaimer in the
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| 14 | # documentation and/or other materials provided with the distribution.
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| 15 | # - The name of the author may not be used to endorse or promote products
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| 16 | # derived from this software without specific prior written permission.
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| 17 | #
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| 18 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 19 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 20 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 21 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 22 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 23 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 24 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 25 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 26 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 27 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | #
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| 29 |
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| 30 | import sys
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| 31 | import yaml
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| 32 | import re
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| 33 |
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| 34 | def usage():
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| 35 | print("%s - Automated structure and offsets generator" % sys.argv[0])
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| 36 | print("%s file.ag depend|probe|generate struct.ag" % sys.argv[0])
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| 37 | sys.exit()
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| 38 |
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| 39 | def depend(struct):
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| 40 | deps = ""
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| 41 | for include in struct['includes']:
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| 42 | if 'depends' in include.keys():
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| 43 | deps = deps + include['depends'] + "\n"
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| 44 | return deps.strip()
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| 45 |
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| 46 | def generate_includes(struct):
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| 47 | code = ""
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| 48 | for include in struct['includes']:
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| 49 | if 'guard' in include.keys():
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| 50 | code = code + "#ifdef %s\n" % include['guard']
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| 51 | if 'negative-guard' in include.keys():
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| 52 | code = code + "#ifndef %s\n" % include['negative-guard']
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| 53 | code = code + "#include %s\n" % include['include']
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| 54 | if 'guard' in include.keys():
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| 55 | code = code + "#endif\n"
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| 56 | if 'negative-guard' in include.keys():
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| 57 | code = code + "#endif\n"
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| 58 | return code.strip()
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| 59 |
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| 60 | def generate_struct(struct):
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| 61 | packed = ""
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| 62 | if ('packed' in struct.keys() and struct['packed']):
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| 63 | packed = "__attribute__ ((packed)) "
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| 64 | code = "typedef struct %s {\n" % struct['name']
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| 65 | for i in range(len(struct['members'])):
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| 66 | member = struct['members'][i]
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| 67 | if 'elements' in member.keys():
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| 68 | code = code + "\t%s %s[%d];\n" % (member['type'], member['name'], member['elements'])
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| 69 | else:
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| 70 | code = code + "\t%s %s;\n" % (member['type'], member['name'])
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| 71 | code = code + "} %s%s_t;" % (packed, struct['name'])
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| 72 | return code
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| 73 |
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| 74 | def generate_probes(struct):
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| 75 | code = ""
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| 76 | for i in range(len(struct['members'])):
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| 77 | member = struct['members'][i]
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| 78 | code = code + ("\temit_constant(%s_OFFSET_%s, offsetof(%s_t, %s));\n" %
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| 79 | (struct['name'].upper(), member['name'].upper(), struct['name'],
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| 80 | member['name']))
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| 81 | code = code + ("\temit_constant(%s_SIZE_%s, sizeof(((%s_t *) 0)->%s));\n" %
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| 82 | (struct['name'].upper(), member['name'].upper(), struct['name'],
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| 83 | member['name']))
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| 84 | if 'elements' in member.keys():
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| 85 | code = code + ("\temit_constant(%s_%s_ITEM_SIZE, sizeof(%s));\n" %
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| 86 | (struct['name'].upper(), member['name'].upper(), member['type']))
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| 87 |
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| 88 | return code
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| 89 |
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| 90 | def probe(struct):
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| 91 | name = struct['name']
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| 92 | typename = struct['name'] + "_t"
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| 93 |
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| 94 | code = """
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| 95 | %s
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| 96 |
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| 97 | #define str(s) #s
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| 98 | #define emit_constant(n, v) \
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| 99 | asm volatile ("EMITTED_CONSTANT " str(n) \" = %%0\" :: \"i\" (v))
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| 100 | #define offsetof(t, m) ((size_t) &(((t *) 0)->m))
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| 101 |
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| 102 | %s
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| 103 |
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| 104 | extern int main(int, char *[]);
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| 105 |
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| 106 | int main(int argc, char *argv[])
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| 107 | {
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| 108 | %s
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| 109 | emit_constant(%s_SIZE, sizeof(%s));
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| 110 | return 0;
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| 111 | }
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| 112 | """ % (generate_includes(struct), generate_struct(struct),
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| 113 | generate_probes(struct), name.upper(), typename)
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| 114 |
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| 115 | return code
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| 116 |
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| 117 | def generate_defines(pairs):
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| 118 | code = ""
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| 119 | for pair in pairs:
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| 120 | code = code + "#define %s %s\n" % (pair[0], pair[1])
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| 121 | return code.strip()
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| 122 |
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| 123 | def generate(struct, lines):
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| 124 | code = """
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| 125 | /*****************************************************************************
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| 126 | * AUTO-GENERATED FILE, DO NOT EDIT!!!
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| 127 | * Generated by: tools/autogen.py
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| 128 | * Generated from: %s
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| 129 | *****************************************************************************/
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| 130 |
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| 131 | #ifndef AUTOGEN_%s_H
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| 132 | #define AUTOGEN_%s_H
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| 133 |
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| 134 | #ifndef __ASM__
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| 135 | %s
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| 136 | #endif
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| 137 |
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| 138 | %s
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| 139 |
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| 140 | #ifndef __ASM__
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| 141 | %s
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| 142 | #endif
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| 143 |
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| 144 | #endif
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| 145 | """ % (sys.argv[2], struct['name'].upper(), struct['name'].upper(),
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| 146 | generate_includes(struct), generate_defines(lines),
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| 147 | generate_struct(struct))
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| 148 |
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| 149 | return code
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| 150 |
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| 151 | def filter_pairs(lines):
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| 152 | pattern = re.compile("^\tEMITTED_CONSTANT ([A-Z_][A-Z0-9_]*) = (\$|#)?([0-9]+)$");
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| 153 | pairs = []
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| 154 | for line in lines:
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| 155 | res = pattern.match(line)
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| 156 | if res == None:
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| 157 | continue
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| 158 | pairs = pairs + [res.group(1, 3)]
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| 159 | return pairs
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| 160 |
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| 161 |
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| 162 | def run():
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| 163 | if len(sys.argv) != 3:
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| 164 | usage()
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| 165 |
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| 166 | with open(sys.argv[2], "rb") as fp:
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| 167 | struct = yaml.load(fp)
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| 168 |
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| 169 | if sys.argv[1] == "depend":
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| 170 | deps = depend(struct)
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| 171 | print(deps)
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| 172 | elif sys.argv[1] == "probe":
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| 173 | code = probe(struct)
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| 174 | print(code)
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| 175 | elif sys.argv[1] == "generate":
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| 176 | lines = sys.stdin.readlines()
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| 177 | pairs = filter_pairs(lines)
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| 178 | code = generate(struct, pairs)
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| 179 | print(code)
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| 180 | else:
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| 181 | usage()
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| 182 |
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| 183 | run()
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