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