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

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