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 
libdw__arch_set_initial_registers(Dwfl_Thread * thread,void * arg)8 bool 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