1#include <elfutils/libdwfl.h>
2#include "../../util/unwind-libdw.h"
3#include "../../util/perf_regs.h"
4
5bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
6{
7	struct unwind_info *ui = arg;
8	struct regs_dump *user_regs = &ui->sample->user_regs;
9	Dwarf_Word dwarf_regs[17];
10	unsigned nregs;
11
12#define REG(r) ({						\
13	Dwarf_Word val = 0;					\
14	perf_reg_value(&val, user_regs, PERF_REG_X86_##r);	\
15	val;							\
16})
17
18	if (user_regs->abi == PERF_SAMPLE_REGS_ABI_32) {
19		dwarf_regs[0] = REG(AX);
20		dwarf_regs[1] = REG(CX);
21		dwarf_regs[2] = REG(DX);
22		dwarf_regs[3] = REG(BX);
23		dwarf_regs[4] = REG(SP);
24		dwarf_regs[5] = REG(BP);
25		dwarf_regs[6] = REG(SI);
26		dwarf_regs[7] = REG(DI);
27		dwarf_regs[8] = REG(IP);
28		nregs = 9;
29	} else {
30		dwarf_regs[0]  = REG(AX);
31		dwarf_regs[1]  = REG(DX);
32		dwarf_regs[2]  = REG(CX);
33		dwarf_regs[3]  = REG(BX);
34		dwarf_regs[4]  = REG(SI);
35		dwarf_regs[5]  = REG(DI);
36		dwarf_regs[6]  = REG(BP);
37		dwarf_regs[7]  = REG(SP);
38		dwarf_regs[8]  = REG(R8);
39		dwarf_regs[9]  = REG(R9);
40		dwarf_regs[10] = REG(R10);
41		dwarf_regs[11] = REG(R11);
42		dwarf_regs[12] = REG(R12);
43		dwarf_regs[13] = REG(R13);
44		dwarf_regs[14] = REG(R14);
45		dwarf_regs[15] = REG(R15);
46		dwarf_regs[16] = REG(IP);
47		nregs = 17;
48	}
49
50	return dwfl_thread_state_registers(thread, 0, nregs, dwarf_regs);
51}
52