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[32];
14 
15 #define REG(r) ({						\
16 	Dwarf_Word val = 0;					\
17 	perf_reg_value(&val, user_regs, PERF_REG_RISCV_##r);	\
18 	val;							\
19 })
20 
21 	dwarf_regs[0]  = 0;
22 	dwarf_regs[1]  = REG(RA);
23 	dwarf_regs[2]  = REG(SP);
24 	dwarf_regs[3]  = REG(GP);
25 	dwarf_regs[4]  = REG(TP);
26 	dwarf_regs[5]  = REG(T0);
27 	dwarf_regs[6]  = REG(T1);
28 	dwarf_regs[7]  = REG(T2);
29 	dwarf_regs[8]  = REG(S0);
30 	dwarf_regs[9]  = REG(S1);
31 	dwarf_regs[10] = REG(A0);
32 	dwarf_regs[11] = REG(A1);
33 	dwarf_regs[12] = REG(A2);
34 	dwarf_regs[13] = REG(A3);
35 	dwarf_regs[14] = REG(A4);
36 	dwarf_regs[15] = REG(A5);
37 	dwarf_regs[16] = REG(A6);
38 	dwarf_regs[17] = REG(A7);
39 	dwarf_regs[18] = REG(S2);
40 	dwarf_regs[19] = REG(S3);
41 	dwarf_regs[20] = REG(S4);
42 	dwarf_regs[21] = REG(S5);
43 	dwarf_regs[22] = REG(S6);
44 	dwarf_regs[23] = REG(S7);
45 	dwarf_regs[24] = REG(S8);
46 	dwarf_regs[25] = REG(S9);
47 	dwarf_regs[26] = REG(S10);
48 	dwarf_regs[27] = REG(S11);
49 	dwarf_regs[28] = REG(T3);
50 	dwarf_regs[29] = REG(T4);
51 	dwarf_regs[30] = REG(T5);
52 	dwarf_regs[31] = REG(T6);
53 	dwfl_thread_state_register_pc(thread, REG(PC));
54 
55 	return dwfl_thread_state_registers(thread, 0, PERF_REG_RISCV_MAX,
56 					   dwarf_regs);
57 }
58