gdb/riscv-ravenscar-thread.c

   1 /* Ravenscar RISC-V target support.
   2
   3    Copyright (C) 2019-2022 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "gdbarch.h"
  22 #include "gdbcore.h"
  23 #include "regcache.h"
  24 #include "riscv-tdep.h"
  25 #include "inferior.h"
  26 #include "ravenscar-thread.h"
  27 #include "riscv-ravenscar-thread.h"
  28
  29 #define LAST_REGISTER (RISCV_FIRST_FP_REGNUM + 14)
  30
  31 struct riscv_ravenscar_ops : public ravenscar_arch_ops
  32 {
  33   int reg_offsets[LAST_REGISTER + 1];
  34
  35   riscv_ravenscar_ops (struct gdbarch *arch);
  36 };
  37
  38 riscv_ravenscar_ops::riscv_ravenscar_ops (struct gdbarch *arch)
  39   : ravenscar_arch_ops (gdb::make_array_view (reg_offsets, LAST_REGISTER + 1))
  40 {
  41   int reg_size = riscv_isa_xlen (arch);
  42
  43   for (int regnum = 0; regnum <= LAST_REGISTER; ++regnum)
  44     {
  45       int offset;
  46       if (regnum == RISCV_RA_REGNUM || regnum == RISCV_PC_REGNUM)
  47         offset = 0;
  48       else if (regnum == RISCV_SP_REGNUM)
  49         offset = 1;
  50       else if (regnum == RISCV_ZERO_REGNUM + 8) /* S0 */
  51         offset = 2;
  52       else if (regnum == RISCV_ZERO_REGNUM + 9) /* S1 */
  53         offset = 3;
  54       else if (regnum >= RISCV_ZERO_REGNUM + 19
  55                && regnum <= RISCV_ZERO_REGNUM + 27) /* S2..S11 */
  56         offset = regnum - (RISCV_ZERO_REGNUM + 19) + 4;
  57       else if (regnum >= RISCV_FIRST_FP_REGNUM
  58                && regnum <= RISCV_FIRST_FP_REGNUM + 11)
  59         offset = regnum - RISCV_FIRST_FP_REGNUM + 14; /* FS0..FS11 */
  60       else
  61         offset = -1;
  62
  63       if (offset != -1)
  64         offset *= reg_size;
  65
  66       reg_offsets[regnum] = offset;
  67     }
  68 }
  69
  70 /* Register riscv_ravenscar_ops in GDBARCH.  */
  71
  72 void
  73 register_riscv_ravenscar_ops (struct gdbarch *gdbarch)
  74 {
  75   set_gdbarch_ravenscar_ops (gdbarch, new riscv_ravenscar_ops (gdbarch));
  76 }