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

DEFINITIONS

1. libdw__arch_set_initial_registers

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <elfutils/libdwfl.h>
   3 #include "../../util/unwind-libdw.h"
   4 #include "../../util/perf_regs.h"
   5 #include "../../util/event.h"
   6 
   7 bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
   8 {
   9         struct unwind_info *ui = arg;
  10         struct regs_dump *user_regs = &ui->sample->user_regs;
  11         Dwarf_Word dwarf_regs[PERF_REG_ARM_MAX];
  12 
  13 #define REG(r) ({                                               \
  14         Dwarf_Word val = 0;                                     \
  15         perf_reg_value(&val, user_regs, PERF_REG_ARM_##r);      \
  16         val;                                                    \
  17 })
  18 
  19         dwarf_regs[0]  = REG(R0);
  20         dwarf_regs[1]  = REG(R1);
  21         dwarf_regs[2]  = REG(R2);
  22         dwarf_regs[3]  = REG(R3);
  23         dwarf_regs[4]  = REG(R4);
  24         dwarf_regs[5]  = REG(R5);
  25         dwarf_regs[6]  = REG(R6);
  26         dwarf_regs[7]  = REG(R7);
  27         dwarf_regs[8]  = REG(R8);
  28         dwarf_regs[9]  = REG(R9);
  29         dwarf_regs[10] = REG(R10);
  30         dwarf_regs[11] = REG(FP);
  31         dwarf_regs[12] = REG(IP);
  32         dwarf_regs[13] = REG(SP);
  33         dwarf_regs[14] = REG(LR);
  34         dwarf_regs[15] = REG(PC);
  35 
  36         return dwfl_thread_state_registers(thread, 0, PERF_REG_ARM_MAX,
  37                                            dwarf_regs);
  38 }