297 lines
8.4 KiB
Python
Executable File
297 lines
8.4 KiB
Python
Executable File
#!/usr/bin/env python3
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from argparse import ArgumentParser
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import json
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def needs_arg_ptr_stub(decl):
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res = (decl['ret']['tag'] == 'S')
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for arg in decl['args']:
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if arg['type']['tag'] == 'S':
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res = True
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return(res)
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def printError(str):
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# This prints a string with a red foreground color.
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# See this link for an explanation of console escape codes: https://stackabuse.com/how-to-print-colored-text-in-python/
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print("\x1b[38;5;196m" + "error: " + str + "\033[0;0m")
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def bindgen(apiName, spec, **kwargs):
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guest_stubs_path = kwargs.get("guest_stubs")
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guest_include = kwargs.get("guest_include")
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wasm3_bindings_path = kwargs.get("wasm3_bindings")
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if guest_stubs_path == None:
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guest_stubs_path = 'bindgen_' + apiName + '_guest_stubs.c'
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if wasm3_bindings_path == None:
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wasm3_bindings_path = 'bindgen_' + apiName + '_wasm3_bindings.c'
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host_bindings = open(wasm3_bindings_path, 'w')
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guest_bindings = None
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specFile = open(spec, 'r')
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data = json.load(specFile)
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for decl in data:
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if needs_arg_ptr_stub(decl):
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guest_bindings = open(guest_stubs_path, 'w')
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if guest_include != None:
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s = '#include"' + guest_include + '"\n\n'
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print(s, file=guest_bindings)
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break
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for decl in data:
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name = decl['name']
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cname = decl.get('cname', name)
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if needs_arg_ptr_stub(decl):
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argPtrStubName = name + '_argptr_stub'
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# pointer arg stub declaration
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s = ''
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if decl['ret']['tag'] == 'S':
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s += 'void'
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else:
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s += decl['ret']['name']
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s += ' ORCA_IMPORT(' + argPtrStubName + ') ('
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if decl['ret']['tag'] == 'S':
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s += decl['ret']['name'] + '* __retArg'
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if len(decl['args']) > 0:
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s += ', '
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for i, arg in enumerate(decl['args']):
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s += arg['type']['name']
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if arg['type']['tag'] == 'S':
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s += '*'
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s += ' ' + arg['name']
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if i+1 < len(decl['args']):
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s += ', '
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s += ');\n\n'
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# forward function to pointer arg stub declaration
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s += decl['ret']['name'] + ' ' + name + '('
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for i, arg in enumerate(decl['args']):
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s += arg['type']['name'] + ' ' + arg['name']
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if i+1 < len(decl['args']):
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s += ', '
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s += ')\n'
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s += '{\n'
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s += '\t'
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if decl['ret']['tag'] == 'S':
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s += decl['ret']['name'] + ' __ret;\n\t'
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elif decl['ret']['tag'] != 'v':
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s += decl['ret']['name']
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s += ' __ret = '
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s += argPtrStubName + '('
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if decl['ret']['tag'] == 'S':
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s += '&__ret'
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if len(decl['args']) > 0:
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s += ', '
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for i, arg in enumerate(decl['args']):
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if arg['type']['tag'] == 'S':
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s += '&'
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s += arg['name']
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if i+1 < len(decl['args']):
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s += ', '
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s += ');\n'
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if decl['ret']['tag'] != 'v':
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s += '\treturn(__ret);\n'
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s += '}\n\n'
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print(s, file=guest_bindings)
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# host-side stub
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s = 'const void* ' + cname + '_stub(IM3Runtime runtime, IM3ImportContext _ctx, uint64_t* _sp, void* _mem)'
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gen_stub = decl.get('gen_stub', True)
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if gen_stub == False:
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s += ';\n\n'
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else:
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s += '\n{\n'
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# NOTE: check and cast arguments
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retTag = decl['ret']['tag']
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firstArgIndex = 0
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if retTag != 'v':
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firstArgIndex = 1
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if retTag == 'S':
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retTypeName = decl['ret']['name']
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retTypeCName = decl['ret'].get('cname', retTypeName)
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s += retTypeCName + '* __retPtr = (' + retTypeCName + '*)((char*)_mem + *(i32*)&_sp[0]);\n'
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s += '\t{\n'
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s += '\t\tOC_ASSERT(((char*)__retPtr >= (char*)_mem) && (((char*)__retPtr - (char*)_mem) < m3_GetMemorySize(runtime)), "return pointer is out of bounds");\n'
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s += '\t\tOC_ASSERT((char*)__retPtr + sizeof(' + retTypeCName + ') <= ((char*)_mem + m3_GetMemorySize(runtime)), "return pointer is out of bounds");\n'
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s += '\t}\n'
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for argIndex, arg in enumerate(decl['args']):
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argName = arg['name']
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typeName = arg['type']['name']
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typeCName = arg['type'].get('cname', typeName)
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argTag = arg['type']['tag']
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s += '\t'
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if argTag == 'i':
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s += typeCName + ' ' + argName + ' = ('+typeCName+')*(i32*)&_sp[' + str(firstArgIndex + argIndex) + '];\n'
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elif argTag == 'I':
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s += typeCName + ' ' + argName + ' = ('+typeCName+')*(i64*)&_sp[' + str(firstArgIndex + argIndex) + '];\n'
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elif argTag == 'f':
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s += typeCName + ' ' + argName + ' = ('+typeCName+')*(f32*)&_sp[' + str(firstArgIndex + argIndex) + '];\n'
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elif argTag == 'F':
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s += typeCName + ' ' + argName + ' = ('+typeCName+')*(f64*)&_sp[' + str(firstArgIndex + argIndex) + '];\n'
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elif argTag == 'p':
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s += typeCName + ' ' + argName + ' = ('+ typeCName +')((char*)_mem + *(u32*)&_sp[' + str(firstArgIndex + argIndex) + ']);\n'
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elif argTag == 'S':
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s += typeCName + ' ' + argName + ' = *('+ typeCName +'*)((char*)_mem + *(u32*)&_sp[' + str(firstArgIndex + argIndex) + ']);\n'
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else:
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print('unrecognized type ' + c + ' in procedure signature\n')
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break
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# check pointer arg length
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for arg in decl['args']:
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argName = arg['name']
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typeName = arg['type']['name']
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typeCName = arg['type'].get('cname', typeName)
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argTag = arg['type']['tag']
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argLen = arg.get('len')
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if argTag == 'p':
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if argLen == None:
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printError("binding '" + name + "' missing pointer length decoration for param '" + argName + "'")
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else:
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s += '\t{\n'
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s += '\t\tOC_ASSERT(((char*)'+ argName + ' >= (char*)_mem) && (((char*)'+ argName +' - (char*)_mem) < m3_GetMemorySize(runtime)), "parameter \''+argName+'\' is out of bounds");\n'
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s += '\t\tOC_ASSERT((char*)' + argName + ' + '
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proc = argLen.get('proc')
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if proc != None:
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s += proc + '(runtime, '
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lenProcArgs = argLen['args']
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for i, lenProcArg in enumerate(lenProcArgs):
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s += lenProcArg
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if i < len(lenProcArgs)-1:
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s += ', '
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s += ')'
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else:
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components = argLen.get('components')
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countArg = argLen.get('count')
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if components != None:
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s += str(components)
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if countArg != None:
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s += '*'
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if countArg != None:
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s += countArg
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if typeCName.endswith('**') or (typeCName.startswith('void') == False and typeCName.startswith('const void') == False):
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s += '*sizeof('+typeCName[:-1]+')'
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s += ' <= ((char*)_mem + m3_GetMemorySize(runtime)), "parameter \''+argName+'\' is out of bounds");\n'
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s += '\t}\n'
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s += '\t'
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if retTag == 'i':
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s += '*((i32*)&_sp[0]) = (i32)'
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elif retTag == 'I':
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s += '*((i64*)&_sp[0]) = (i64)'
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elif retTag == 'f':
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s += '*((f32*)&_sp[0]) = (f32)'
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elif retTag == 'F':
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s += '*((f64*)&_sp[0]) = (f64)'
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elif retTag == 'S':
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s += '*__retPtr = '
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elif retTag == 'p':
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print("Warning: " + name + ": pointer return type not supported yet")
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s += cname + '('
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for i, arg in enumerate(decl['args']):
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s += arg['name']
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if i+1 < len(decl['args']):
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s += ', '
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s += ');\n\treturn(0);\n}\n\n'
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print(s, file=host_bindings)
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# link function
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s = 'int bindgen_link_' + apiName + '_api(IM3Module module)\n{\n'
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s += ' M3Result res;\n'
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s += ' int ret = 0;\n'
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for decl in data:
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name = decl['name']
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cname = decl.get('cname', name)
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if needs_arg_ptr_stub(decl):
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name = name + '_argptr_stub'
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m3Sig = ''
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if decl['ret']['tag'] == 'S':
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m3Sig += 'v'
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else:
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m3Sig += decl['ret']['tag']
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m3Sig += '('
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if decl['ret']['tag'] == 'S':
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m3Sig += 'i'
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for arg in decl['args']:
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tag = arg['type']['tag']
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if tag == 'p' or tag == 'S':
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tag = 'i'
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m3Sig += tag
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m3Sig += ')'
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s += ' res = m3_LinkRawFunction(module, "*", "' + name + '", "' + m3Sig + '", ' + cname + '_stub);\n'
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s += ' if(res != m3Err_none && res != m3Err_functionLookupFailed)\n'
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s += ' {\n'
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s += ' oc_log_error("Couldn\'t link function ' + name + ' (%s)\\n", res);\n'
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s += ' ret = -1;\n'
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s += ' }\n\n'
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s += '\treturn(ret);\n}\n'
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print(s, file=host_bindings)
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if __name__ == "__main__":
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parser = ArgumentParser(prog='bindgen.py')
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parser.add_argument('api')
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parser.add_argument('spec')
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parser.add_argument('-g', '--guest-stubs')
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parser.add_argument('--guest-include')
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parser.add_argument('--wasm3-bindings')
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args = parser.parse_args()
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apiName = args.api
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spec = args.spec
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guest_stubs_path = args.guest_stubs
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if guest_stubs_path == None:
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guest_stubs_path = 'bindgen_' + apiName + '_guest_stubs.c'
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wasm3_bindings_path = args.wasm3_bindings
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if wasm3_bindings_path == None:
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wasm3_bindings_path = 'bindgen_' + apiName + '_wasm3_bindings.c'
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bindgen(apiName, spec,
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guest_stubs=guest_stubs_path,
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guest_include=args.guest_include,
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wasm3_bindings=wasm3_bindings_path,
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)
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