1 // Copyright 2017 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
4
5 #include "textflag.h"
6
7 // These functions are no-ops, but you can search for their implementations
8 // to find out whether they are linked into a particular binary.
9 //
10 // Each function consists of a two-byte jump over the next 29-bytes,
11 // then a 5-byte indicator sequence unlikely to occur in real x86 instructions,
12 // then a randomly-chosen 24-byte sequence, and finally a return instruction
13 // (the target of the jump).
14 //
15 // These sequences are known to rsc.io/goversion.
16
17 #define START \
18 BYTE $0xEB; BYTE $0x1D; BYTE $0xF4; BYTE $0x48; BYTE $0xF4; BYTE $0x4B; BYTE $0xF4
19
20 #define END \
21 BYTE $0xC3
22
23 // BoringCrypto indicates that BoringCrypto (in particular, its func init) is present.
24 TEXT ·BoringCrypto(SB),NOSPLIT,$0
25 START
26 BYTE $0xB3; BYTE $0x32; BYTE $0xF5; BYTE $0x28;
27 BYTE $0x13; BYTE $0xA3; BYTE $0xB4; BYTE $0x50;
28 BYTE $0xD4; BYTE $0x41; BYTE $0xCC; BYTE $0x24;
29 BYTE $0x85; BYTE $0xF0; BYTE $0x01; BYTE $0x45;
30 BYTE $0x4E; BYTE $0x92; BYTE $0x10; BYTE $0x1B;
31 BYTE $0x1D; BYTE $0x2F; BYTE $0x19; BYTE $0x50;
32 END
33
34 // StandardCrypto indicates that standard Go crypto is present.
35 TEXT ·StandardCrypto(SB),NOSPLIT,$0
36 START
37 BYTE $0xba; BYTE $0xee; BYTE $0x4d; BYTE $0xfa;
38 BYTE $0x98; BYTE $0x51; BYTE $0xca; BYTE $0x56;
39 BYTE $0xa9; BYTE $0x11; BYTE $0x45; BYTE $0xe8;
40 BYTE $0x3e; BYTE $0x99; BYTE $0xc5; BYTE $0x9c;
41 BYTE $0xf9; BYTE $0x11; BYTE $0xcb; BYTE $0x8e;
42 BYTE $0x80; BYTE $0xda; BYTE $0xf1; BYTE $0x2f;
43 END
44
45 // FIPSOnly indicates that crypto/tls/fipsonly is present.
46 TEXT ·FIPSOnly(SB),NOSPLIT,$0
47 START
48 BYTE $0x36; BYTE $0x3C; BYTE $0xB9; BYTE $0xCE;
49 BYTE $0x9D; BYTE $0x68; BYTE $0x04; BYTE $0x7D;
50 BYTE $0x31; BYTE $0xF2; BYTE $0x8D; BYTE $0x32;
51 BYTE $0x5D; BYTE $0x5C; BYTE $0xA5; BYTE $0x87;
52 BYTE $0x3F; BYTE $0x5D; BYTE $0x80; BYTE $0xCA;
53 BYTE $0xF6; BYTE $0xD6; BYTE $0x15; BYTE $0x1B;
54 END
55
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