1 /*
2  * host-signal.h: signal info dependent on the host architecture
3  *
4  * Copyright (c) 2003-2005 Fabrice Bellard
5  * Copyright (c) 2021 Linaro Limited
6  *
7  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
8  * See the COPYING file in the top-level directory.
9  */
10 
11 #ifndef SPARC64_HOST_SIGNAL_H
12 #define SPARC64_HOST_SIGNAL_H
13 
14 /* The third argument to a SA_SIGINFO handler is struct sigcontext.  */
15 typedef struct sigcontext host_sigcontext;
16 
17 static inline uintptr_t host_signal_pc(host_sigcontext *sc)
18 {
19     return sc->sigc_regs.tpc;
20 }
21 
22 static inline void host_signal_set_pc(host_sigcontext *sc, uintptr_t pc)
23 {
24     sc->sigc_regs.tpc = pc;
25     sc->sigc_regs.tnpc = pc + 4;
26 }
27 
28 static inline void *host_signal_mask(host_sigcontext *sc)
29 {
30     return &sc->sigc_mask;
31 }
32 
33 static inline bool host_signal_write(siginfo_t *info, host_sigcontext *uc)
34 {
35     uint32_t insn = *(uint32_t *)host_signal_pc(uc);
36 
37     if ((insn >> 30) == 3) {
38         switch ((insn >> 19) & 0x3f) {
39         case 0x05: /* stb */
40         case 0x15: /* stba */
41         case 0x06: /* sth */
42         case 0x16: /* stha */
43         case 0x04: /* st */
44         case 0x14: /* sta */
45         case 0x07: /* std */
46         case 0x17: /* stda */
47         case 0x0e: /* stx */
48         case 0x1e: /* stxa */
49         case 0x24: /* stf */
50         case 0x34: /* stfa */
51         case 0x27: /* stdf */
52         case 0x37: /* stdfa */
53         case 0x26: /* stqf */
54         case 0x36: /* stqfa */
55         case 0x25: /* stfsr */
56         case 0x3c: /* casa */
57         case 0x3e: /* casxa */
58             return true;
59         }
60     }
61     return false;
62 }
63 
64 #endif
65