csky: Add support for perf unwind-libdw
[sfrench/cifs-2.6.git] / tools / perf / arch / csky / util / unwind-libdw.c
1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
3
4 #include <elfutils/libdwfl.h>
5 #include "../../util/unwind-libdw.h"
6 #include "../../util/perf_regs.h"
7 #include "../../util/event.h"
8
9 bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
10 {
11         struct unwind_info *ui = arg;
12         struct regs_dump *user_regs = &ui->sample->user_regs;
13         Dwarf_Word dwarf_regs[PERF_REG_CSKY_MAX];
14
15 #define REG(r) ({                                               \
16         Dwarf_Word val = 0;                                     \
17         perf_reg_value(&val, user_regs, PERF_REG_CSKY_##r);     \
18         val;                                                    \
19 })
20
21 #if defined(__CSKYABIV2__)
22         dwarf_regs[0]  = REG(A0);
23         dwarf_regs[1]  = REG(A1);
24         dwarf_regs[2]  = REG(A2);
25         dwarf_regs[3]  = REG(A3);
26         dwarf_regs[4]  = REG(REGS0);
27         dwarf_regs[5]  = REG(REGS1);
28         dwarf_regs[6]  = REG(REGS2);
29         dwarf_regs[7]  = REG(REGS3);
30         dwarf_regs[8]  = REG(REGS4);
31         dwarf_regs[9]  = REG(REGS5);
32         dwarf_regs[10] = REG(REGS6);
33         dwarf_regs[11] = REG(REGS7);
34         dwarf_regs[12] = REG(REGS8);
35         dwarf_regs[13] = REG(REGS9);
36         dwarf_regs[14] = REG(SP);
37         dwarf_regs[15] = REG(LR);
38         dwarf_regs[16] = REG(EXREGS0);
39         dwarf_regs[17] = REG(EXREGS1);
40         dwarf_regs[18] = REG(EXREGS2);
41         dwarf_regs[19] = REG(EXREGS3);
42         dwarf_regs[20] = REG(EXREGS4);
43         dwarf_regs[21] = REG(EXREGS5);
44         dwarf_regs[22] = REG(EXREGS6);
45         dwarf_regs[23] = REG(EXREGS7);
46         dwarf_regs[24] = REG(EXREGS8);
47         dwarf_regs[25] = REG(EXREGS9);
48         dwarf_regs[26] = REG(EXREGS10);
49         dwarf_regs[27] = REG(EXREGS11);
50         dwarf_regs[28] = REG(EXREGS12);
51         dwarf_regs[29] = REG(EXREGS13);
52         dwarf_regs[30] = REG(EXREGS14);
53         dwarf_regs[31] = REG(TLS);
54         dwarf_regs[32] = REG(PC);
55 #else
56         dwarf_regs[0]  = REG(SP);
57         dwarf_regs[1]  = REG(REGS9);
58         dwarf_regs[2]  = REG(A0);
59         dwarf_regs[3]  = REG(A1);
60         dwarf_regs[4]  = REG(A2);
61         dwarf_regs[5]  = REG(A3);
62         dwarf_regs[6]  = REG(REGS0);
63         dwarf_regs[7]  = REG(REGS1);
64         dwarf_regs[8]  = REG(REGS2);
65         dwarf_regs[9]  = REG(REGS3);
66         dwarf_regs[10] = REG(REGS4);
67         dwarf_regs[11] = REG(REGS5);
68         dwarf_regs[12] = REG(REGS6);
69         dwarf_regs[13] = REG(REGS7);
70         dwarf_regs[14] = REG(REGS8);
71         dwarf_regs[15] = REG(LR);
72 #endif
73         dwfl_thread_state_register_pc(thread, REG(PC));
74
75         return dwfl_thread_state_registers(thread, 0, PERF_REG_CSKY_MAX,
76                                            dwarf_regs);
77 }