// Copyright 2017 syzkaller project authors. All rights reserved.
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// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
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// XedDecode is required for tests, but it requires Intel XED library installed, so it is disabled by default.
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// To run full tests, check out and build github.com/intelxed/xed, then run:
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// INTELXED=/path/to/intelxed CGO_CFLAGS="-I $INTELXED/xed/include/public \
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// -I $INTELXED/build/obj" CGO_LDFLAGS="$INTELXED/build/obj/libxed.a" \
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// go test -v -tags xed
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// +build xed
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package ifuzz
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/*
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#include "xed-interface.h"
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int xedDecode(int mode, int addrsize, void* text, int size, const char** error) {
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xed_decoded_inst_t xedd;
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xed_decoded_inst_zero(&xedd);
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xed_decoded_inst_set_mode(&xedd, mode, addrsize);
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xed_error_enum_t err = xed_decode(&xedd, text, size);
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if (err != XED_ERROR_NONE) {
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if (error)
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*error = xed_error_enum_t2str(err);
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return 0;
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}
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return xed_decoded_inst_get_length(&xedd);
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}
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*/
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import "C"
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import (
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"errors"
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"unsafe"
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)
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func init() {
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C.xed_tables_init()
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XedDecode = xedDecode
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}
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func xedDecode(mode int, text []byte) (int, error) {
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xedMode := 0
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xedAddr := 0
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switch mode {
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case ModeLong64:
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xedMode = C.XED_MACHINE_MODE_LONG_64
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xedAddr = C.XED_ADDRESS_WIDTH_64b
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case ModeProt32:
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xedMode = C.XED_MACHINE_MODE_LONG_COMPAT_32
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xedAddr = C.XED_ADDRESS_WIDTH_32b
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case ModeProt16:
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xedMode = C.XED_MACHINE_MODE_LONG_COMPAT_16
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xedAddr = C.XED_ADDRESS_WIDTH_16b
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case ModeReal16:
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xedMode = C.XED_MACHINE_MODE_REAL_16
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xedAddr = C.XED_ADDRESS_WIDTH_16b
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default:
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panic("bad mode")
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}
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var errorStr *C.char
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res := C.xedDecode(C.int(xedMode), C.int(xedAddr), unsafe.Pointer(&text[0]), C.int(len(text)), &errorStr)
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if res == 0 {
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return 0, errors.New(C.GoString(errorStr))
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}
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return int(res), nil
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}
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