tools/perf/arch/riscv/util/dwarf-regs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
   4  * Mapping of DWARF debug register numbers into register names.
   5  */
   6
   7 #include <stddef.h>
   8 #include <errno.h> /* for EINVAL */
   9 #include <string.h> /* for strcmp */
  10 #include <dwarf-regs.h>
  11
  12 struct pt_regs_dwarfnum {
  13         const char *name;
  14         unsigned int dwarfnum;
  15 };
  16
  17 #define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
  18 #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
  19
  20 struct pt_regs_dwarfnum riscv_dwarf_regs_table[] = {
  21         REG_DWARFNUM_NAME("%zero", 0),
  22         REG_DWARFNUM_NAME("%ra", 1),
  23         REG_DWARFNUM_NAME("%sp", 2),
  24         REG_DWARFNUM_NAME("%gp", 3),
  25         REG_DWARFNUM_NAME("%tp", 4),
  26         REG_DWARFNUM_NAME("%t0", 5),
  27         REG_DWARFNUM_NAME("%t1", 6),
  28         REG_DWARFNUM_NAME("%t2", 7),
  29         REG_DWARFNUM_NAME("%s0", 8),
  30         REG_DWARFNUM_NAME("%s1", 9),
  31         REG_DWARFNUM_NAME("%a0", 10),
  32         REG_DWARFNUM_NAME("%a1", 11),
  33         REG_DWARFNUM_NAME("%a2", 12),
  34         REG_DWARFNUM_NAME("%a3", 13),
  35         REG_DWARFNUM_NAME("%a4", 14),
  36         REG_DWARFNUM_NAME("%a5", 15),
  37         REG_DWARFNUM_NAME("%a6", 16),
  38         REG_DWARFNUM_NAME("%a7", 17),
  39         REG_DWARFNUM_NAME("%s2", 18),
  40         REG_DWARFNUM_NAME("%s3", 19),
  41         REG_DWARFNUM_NAME("%s4", 20),
  42         REG_DWARFNUM_NAME("%s5", 21),
  43         REG_DWARFNUM_NAME("%s6", 22),
  44         REG_DWARFNUM_NAME("%s7", 23),
  45         REG_DWARFNUM_NAME("%s8", 24),
  46         REG_DWARFNUM_NAME("%s9", 25),
  47         REG_DWARFNUM_NAME("%s10", 26),
  48         REG_DWARFNUM_NAME("%s11", 27),
  49         REG_DWARFNUM_NAME("%t3", 28),
  50         REG_DWARFNUM_NAME("%t4", 29),
  51         REG_DWARFNUM_NAME("%t5", 30),
  52         REG_DWARFNUM_NAME("%t6", 31),
  53         REG_DWARFNUM_END,
  54 };
  55
  56 #define RISCV_MAX_REGS ((sizeof(riscv_dwarf_regs_table) / \
  57                  sizeof(riscv_dwarf_regs_table[0])) - 1)
  58
  59 const char *get_arch_regstr(unsigned int n)
  60 {
  61         return (n < RISCV_MAX_REGS) ? riscv_dwarf_regs_table[n].name : NULL;
  62 }
  63
  64 int regs_query_register_offset(const char *name)
  65 {
  66         const struct pt_regs_dwarfnum *roff;
  67
  68         for (roff = riscv_dwarf_regs_table; roff->name; roff++)
  69                 if (!strcmp(roff->name, name))
  70                         return roff->dwarfnum;
  71         return -EINVAL;
  72 }