LXR linux/tools/perf/arch/arm/util/unwind-libdw.c

   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
   7bool 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}
  39