1#include <linux/kernel.h>
 2#include <elfutils/libdwfl.h>
 3#include "../../util/unwind-libdw.h"
 4#include "../../util/perf_regs.h"
 5#include "../../util/event.h"
 6#include "../../util/sample.h"
 7#include "dwarf-regs-table.h"
 8#include "perf_regs.h"
 9
10
11bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
12{
13	struct unwind_info *ui = arg;
14	struct regs_dump *user_regs = &ui->sample->user_regs;
15	Dwarf_Word dwarf_regs[ARRAY_SIZE(s390_dwarf_regs)];
16
17#define REG(r) ({						\
18	Dwarf_Word val = 0;					\
19	perf_reg_value(&val, user_regs, PERF_REG_S390_##r);	\
20	val;							\
21})
22	/*
23	 * For DWARF register mapping details,
24	 * see also perf/arch/s390/include/dwarf-regs-table.h
25	 */
26	dwarf_regs[0]  = REG(R0);
27	dwarf_regs[1]  = REG(R1);
28	dwarf_regs[2]  = REG(R2);
29	dwarf_regs[3]  = REG(R3);
30	dwarf_regs[4]  = REG(R4);
31	dwarf_regs[5]  = REG(R5);
32	dwarf_regs[6]  = REG(R6);
33	dwarf_regs[7]  = REG(R7);
34	dwarf_regs[8]  = REG(R8);
35	dwarf_regs[9]  = REG(R9);
36	dwarf_regs[10] = REG(R10);
37	dwarf_regs[11] = REG(R11);
38	dwarf_regs[12] = REG(R12);
39	dwarf_regs[13] = REG(R13);
40	dwarf_regs[14] = REG(R14);
41	dwarf_regs[15] = REG(R15);
42
43	dwarf_regs[16] = REG(FP0);
44	dwarf_regs[17] = REG(FP2);
45	dwarf_regs[18] = REG(FP4);
46	dwarf_regs[19] = REG(FP6);
47	dwarf_regs[20] = REG(FP1);
48	dwarf_regs[21] = REG(FP3);
49	dwarf_regs[22] = REG(FP5);
50	dwarf_regs[23] = REG(FP7);
51	dwarf_regs[24] = REG(FP8);
52	dwarf_regs[25] = REG(FP10);
53	dwarf_regs[26] = REG(FP12);
54	dwarf_regs[27] = REG(FP14);
55	dwarf_regs[28] = REG(FP9);
56	dwarf_regs[29] = REG(FP11);
57	dwarf_regs[30] = REG(FP13);
58	dwarf_regs[31] = REG(FP15);
59
60	dwarf_regs[64] = REG(MASK);
61	dwarf_regs[65] = REG(PC);
62
63	dwfl_thread_state_register_pc(thread, dwarf_regs[65]);
64	return dwfl_thread_state_registers(thread, 0, 32, dwarf_regs);
65}