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
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
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