1// SPDX-License-Identifier: GPL-2.0
2#include <elfutils/libdwfl.h>
3#include "perf_regs.h"
4#include "../../../util/unwind-libdw.h"
5#include "../../../util/perf_regs.h"
6#include "../../../util/sample.h"
7
8bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
9{
10	struct unwind_info *ui = arg;
11	struct regs_dump *user_regs = &ui->sample->user_regs;
12	Dwarf_Word dwarf_regs[PERF_REG_ARM64_MAX], dwarf_pc;
13
14#define REG(r) ({						\
15	Dwarf_Word val = 0;					\
16	perf_reg_value(&val, user_regs, PERF_REG_ARM64_##r);	\
17	val;							\
18})
19
20	dwarf_regs[0]  = REG(X0);
21	dwarf_regs[1]  = REG(X1);
22	dwarf_regs[2]  = REG(X2);
23	dwarf_regs[3]  = REG(X3);
24	dwarf_regs[4]  = REG(X4);
25	dwarf_regs[5]  = REG(X5);
26	dwarf_regs[6]  = REG(X6);
27	dwarf_regs[7]  = REG(X7);
28	dwarf_regs[8]  = REG(X8);
29	dwarf_regs[9]  = REG(X9);
30	dwarf_regs[10] = REG(X10);
31	dwarf_regs[11] = REG(X11);
32	dwarf_regs[12] = REG(X12);
33	dwarf_regs[13] = REG(X13);
34	dwarf_regs[14] = REG(X14);
35	dwarf_regs[15] = REG(X15);
36	dwarf_regs[16] = REG(X16);
37	dwarf_regs[17] = REG(X17);
38	dwarf_regs[18] = REG(X18);
39	dwarf_regs[19] = REG(X19);
40	dwarf_regs[20] = REG(X20);
41	dwarf_regs[21] = REG(X21);
42	dwarf_regs[22] = REG(X22);
43	dwarf_regs[23] = REG(X23);
44	dwarf_regs[24] = REG(X24);
45	dwarf_regs[25] = REG(X25);
46	dwarf_regs[26] = REG(X26);
47	dwarf_regs[27] = REG(X27);
48	dwarf_regs[28] = REG(X28);
49	dwarf_regs[29] = REG(X29);
50	dwarf_regs[30] = REG(LR);
51	dwarf_regs[31] = REG(SP);
52
53	if (!dwfl_thread_state_registers(thread, 0, PERF_REG_ARM64_MAX,
54					 dwarf_regs))
55		return false;
56
57	dwarf_pc = REG(PC);
58	dwfl_thread_state_register_pc(thread, dwarf_pc);
59
60	return true;
61}
62