tools/perf/arch/s390/util/unwind-libdw.c

   1 #include <linux/kernel.h>
   2 #include <elfutils/libdwfl.h>
   3 #include "../../util/unwind-libdw.h"
   4 #include "../../util/perf_regs.h"
   5 #include "../../util/event.h"
   6 #include "dwarf-regs-table.h"
   7
   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[ARRAY_SIZE(s390_dwarf_regs)];
  14
  15 #define REG(r) ({                                               \
  16         Dwarf_Word val = 0;                                     \
  17         perf_reg_value(&val, user_regs, PERF_REG_S390_##r);     \
  18         val;                                                    \
  19 })
  20         /*
  21          * For DWARF register mapping details,
  22          * see also perf/arch/s390/include/dwarf-regs-table.h
  23          */
  24         dwarf_regs[0]  = REG(R0);
  25         dwarf_regs[1]  = REG(R1);
  26         dwarf_regs[2]  = REG(R2);
  27         dwarf_regs[3]  = REG(R3);
  28         dwarf_regs[4]  = REG(R4);
  29         dwarf_regs[5]  = REG(R5);
  30         dwarf_regs[6]  = REG(R6);
  31         dwarf_regs[7]  = REG(R7);
  32         dwarf_regs[8]  = REG(R8);
  33         dwarf_regs[9]  = REG(R9);
  34         dwarf_regs[10] = REG(R10);
  35         dwarf_regs[11] = REG(R11);
  36         dwarf_regs[12] = REG(R12);
  37         dwarf_regs[13] = REG(R13);
  38         dwarf_regs[14] = REG(R14);
  39         dwarf_regs[15] = REG(R15);
  40
  41         dwarf_regs[16] = REG(FP0);
  42         dwarf_regs[17] = REG(FP2);
  43         dwarf_regs[18] = REG(FP4);
  44         dwarf_regs[19] = REG(FP6);
  45         dwarf_regs[20] = REG(FP1);
  46         dwarf_regs[21] = REG(FP3);
  47         dwarf_regs[22] = REG(FP5);
  48         dwarf_regs[23] = REG(FP7);
  49         dwarf_regs[24] = REG(FP8);
  50         dwarf_regs[25] = REG(FP10);
  51         dwarf_regs[26] = REG(FP12);
  52         dwarf_regs[27] = REG(FP14);
  53         dwarf_regs[28] = REG(FP9);
  54         dwarf_regs[29] = REG(FP11);
  55         dwarf_regs[30] = REG(FP13);
  56         dwarf_regs[31] = REG(FP15);
  57
  58         dwarf_regs[64] = REG(MASK);
  59         dwarf_regs[65] = REG(PC);
  60
  61         dwfl_thread_state_register_pc(thread, dwarf_regs[65]);
  62         return dwfl_thread_state_registers(thread, 0, 32, dwarf_regs);
  63 }