root/tools/perf/arch/riscv/util/unwind-libdw.c

DEFINITIONS

1. libdw__arch_set_initial_registers

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd. */
   3 
   4 #include <elfutils/libdwfl.h>
   5 #include "../../util/unwind-libdw.h"
   6 #include "../../util/perf_regs.h"
   7 #include "../../util/event.h"
   8 
   9 bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
  10 {
  11         struct unwind_info *ui = arg;
  12         struct regs_dump *user_regs = &ui->sample->user_regs;
  13         Dwarf_Word dwarf_regs[32];
  14 
  15 #define REG(r) ({                                               \
  16         Dwarf_Word val = 0;                                     \
  17         perf_reg_value(&val, user_regs, PERF_REG_RISCV_##r);    \
  18         val;                                                    \
  19 })
  20 
  21         dwarf_regs[0]  = 0;
  22         dwarf_regs[1]  = REG(RA);
  23         dwarf_regs[2]  = REG(SP);
  24         dwarf_regs[3]  = REG(GP);
  25         dwarf_regs[4]  = REG(TP);
  26         dwarf_regs[5]  = REG(T0);
  27         dwarf_regs[6]  = REG(T1);
  28         dwarf_regs[7]  = REG(T2);
  29         dwarf_regs[8]  = REG(S0);
  30         dwarf_regs[9]  = REG(S1);
  31         dwarf_regs[10] = REG(A0);
  32         dwarf_regs[11] = REG(A1);
  33         dwarf_regs[12] = REG(A2);
  34         dwarf_regs[13] = REG(A3);
  35         dwarf_regs[14] = REG(A4);
  36         dwarf_regs[15] = REG(A5);
  37         dwarf_regs[16] = REG(A6);
  38         dwarf_regs[17] = REG(A7);
  39         dwarf_regs[18] = REG(S2);
  40         dwarf_regs[19] = REG(S3);
  41         dwarf_regs[20] = REG(S4);
  42         dwarf_regs[21] = REG(S5);
  43         dwarf_regs[22] = REG(S6);
  44         dwarf_regs[23] = REG(S7);
  45         dwarf_regs[24] = REG(S8);
  46         dwarf_regs[25] = REG(S9);
  47         dwarf_regs[26] = REG(S10);
  48         dwarf_regs[27] = REG(S11);
  49         dwarf_regs[28] = REG(T3);
  50         dwarf_regs[29] = REG(T4);
  51         dwarf_regs[30] = REG(T5);
  52         dwarf_regs[31] = REG(T6);
  53         dwfl_thread_state_register_pc(thread, REG(PC));
  54 
  55         return dwfl_thread_state_registers(thread, 0, PERF_REG_RISCV_MAX,
  56                                            dwarf_regs);
  57 }