| 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 json
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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 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 generate_includes(struct):
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| 40 | code = ""
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| 41 | for i in range(len(struct['includes'])):
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| 42 | code = code + "#include %s\n" % struct['includes'][i]
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| 43 | return code.strip()
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| 44 |
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| 45 | def generate_struct(struct):
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| 46 | code = "typedef struct %s {\n" % struct['name']
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| 47 | for i in range(len(struct['members'])):
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| 48 | member = struct['members'][i]
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| 49 | code = code + "\t%s %s;\n" % (member['type'], member['name'])
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| 50 | code = code + "} %s_t;" % struct['name']
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| 51 | return code
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| 52 |
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| 53 | def generate_probes(struct):
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| 54 | code = ""
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| 55 | for i in range(len(struct['members'])):
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| 56 | member = struct['members'][i]
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| 57 | code = code + ("\temit_constant(OFFSET_%s, offsetof(%s_t, %s));\n" %
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| 58 | (member['name'].upper(), struct['name'], member['name']))
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| 59 | return code
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| 60 |
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| 61 | def probe(struct):
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| 62 | name = struct['name']
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| 63 | typename = struct['name'] + "_t"
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| 64 |
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| 65 | code = """
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| 66 | %s
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| 67 |
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| 68 | #define str(s) #s
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| 69 | #define emit_constant(n, v) \
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| 70 | asm volatile ("EMITTED_CONSTANT " str(n) \" = %%0\" :: \"i\" (v))
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| 71 | #define offsetof(t, m) ((size_t) &(((t *) 0)->m))
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| 72 |
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| 73 | %s
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| 74 |
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| 75 | int main()
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| 76 | {
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| 77 | %s
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| 78 | emit_constant(%s_SIZE, sizeof(%s));
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| 79 | return 0;
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| 80 | }
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| 81 | """ % (generate_includes(struct), generate_struct(struct),
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| 82 | generate_probes(struct), name.upper(), typename)
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| 83 |
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| 84 | return code
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| 85 |
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| 86 | def generate_defines(pairs):
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| 87 | code = ""
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| 88 | for pair in pairs:
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| 89 | code = code + "#define %s %s\n" % (pair[0], pair[1])
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| 90 | return code.strip()
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| 91 |
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| 92 | def generate(struct, lines):
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| 93 | code = """
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| 94 | /*****************************************************************************
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| 95 | * AUTO-GENERATED FILE, DO NOT EDIT!!!
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| 96 | * Generated by: tools/autogen.py
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| 97 | * Generated from: %s
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| 98 | *****************************************************************************/
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| 99 |
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| 100 | #ifndef AUTOGEN_%s_H
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| 101 | #define AUTOGEN_%s_H
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| 102 |
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| 103 | #ifndef __ASM__
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| 104 | %s
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| 105 | #endif
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| 106 |
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| 107 | %s
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| 108 |
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| 109 | #ifndef __ASM__
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| 110 | %s
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| 111 | #endif
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| 112 |
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| 113 | #endif
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| 114 | """ % (sys.argv[2], struct['name'].upper(), struct['name'].upper(),
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| 115 | generate_includes(struct), generate_defines(lines),
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| 116 | generate_struct(struct))
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| 117 |
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| 118 | return code
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| 119 |
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| 120 | def filter_pairs(lines):
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| 121 | pattern = re.compile("^\tEMITTED_CONSTANT ([A-Z_]*) = \$([0-9]*)$");
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| 122 | pairs = []
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| 123 | for line in lines:
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| 124 | res = pattern.match(line)
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| 125 | if res == None:
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| 126 | continue
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| 127 | pairs = pairs + [res.group(1, 2)]
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| 128 | return pairs
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| 129 |
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| 130 |
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| 131 | def run():
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| 132 | if len(sys.argv) != 3:
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| 133 | usage()
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| 134 |
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| 135 | with open(sys.argv[2], "rb") as fp:
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| 136 | struct = json.load(fp)
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| 137 |
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| 138 | if sys.argv[1] == "probe":
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| 139 | code = probe(struct)
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| 140 | print(code)
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| 141 | elif sys.argv[1] == "generate":
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| 142 | lines = sys.stdin.readlines()
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| 143 | pairs = filter_pairs(lines)
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| 144 | code = generate(struct, pairs)
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| 145 | print(code)
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| 146 | else:
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| 147 | usage()
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| 148 |
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| 149 | run()
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| 150 |
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