1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2020-2023 Loongson Technology Corporation Limited */
3 
4 #include <elfutils/libdwfl.h>
5 #include "../../util/unwind-libdw.h"
6 #include "../../util/perf_regs.h"
7 #include "../../util/sample.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_LOONGARCH_MAX];
14 
15 #define REG(r) ({							\
16 	Dwarf_Word val = 0;						\
17 	perf_reg_value(&val, user_regs, PERF_REG_LOONGARCH_##r);	\
18 	val;								\
19 })
20 
21 	dwarf_regs[0]  = 0;
22 	dwarf_regs[1]  = REG(R1);
23 	dwarf_regs[2]  = REG(R2);
24 	dwarf_regs[3]  = REG(R3);
25 	dwarf_regs[4]  = REG(R4);
26 	dwarf_regs[5]  = REG(R5);
27 	dwarf_regs[6]  = REG(R6);
28 	dwarf_regs[7]  = REG(R7);
29 	dwarf_regs[8]  = REG(R8);
30 	dwarf_regs[9]  = REG(R9);
31 	dwarf_regs[10] = REG(R10);
32 	dwarf_regs[11] = REG(R11);
33 	dwarf_regs[12] = REG(R12);
34 	dwarf_regs[13] = REG(R13);
35 	dwarf_regs[14] = REG(R14);
36 	dwarf_regs[15] = REG(R15);
37 	dwarf_regs[16] = REG(R16);
38 	dwarf_regs[17] = REG(R17);
39 	dwarf_regs[18] = REG(R18);
40 	dwarf_regs[19] = REG(R19);
41 	dwarf_regs[20] = REG(R20);
42 	dwarf_regs[21] = REG(R21);
43 	dwarf_regs[22] = REG(R22);
44 	dwarf_regs[23] = REG(R23);
45 	dwarf_regs[24] = REG(R24);
46 	dwarf_regs[25] = REG(R25);
47 	dwarf_regs[26] = REG(R26);
48 	dwarf_regs[27] = REG(R27);
49 	dwarf_regs[28] = REG(R28);
50 	dwarf_regs[29] = REG(R29);
51 	dwarf_regs[30] = REG(R30);
52 	dwarf_regs[31] = REG(R31);
53 	dwfl_thread_state_register_pc(thread, REG(PC));
54 
55 	return dwfl_thread_state_registers(thread, 0, PERF_REG_LOONGARCH_MAX, dwarf_regs);
56 }
57