| /* Native-dependent code for GNU/Linux TILE-Gx. |
| |
| Copyright (C) 2012-2021 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include "inferior.h" |
| #include "gdbcore.h" |
| #include "regcache.h" |
| #include "linux-nat.h" |
| #include "inf-ptrace.h" |
| |
| #include "nat/gdb_ptrace.h" |
| |
| #include <sys/procfs.h> |
| |
| /* Defines ps_err_e, struct ps_prochandle. */ |
| #include "gdb_proc_service.h" |
| |
| /* Prototypes for supply_gregset etc. */ |
| #include "gregset.h" |
| |
| class tilegx_linux_nat_target final : public linux_nat_target |
| { |
| public: |
| /* Add our register access methods. */ |
| void fetch_registers (struct regcache *, int) override; |
| void store_registers (struct regcache *, int) override; |
| }; |
| |
| static tilegx_linux_nat_target the_tilegx_linux_nat_target; |
| |
| /* The register sets used in GNU/Linux ELF core-dumps are identical to |
| the register sets in `struct user' that is used for a.out |
| core-dumps, and is also used by `ptrace'. The corresponding types |
| are `elf_gregset_t' for the general-purpose registers (with |
| `elf_greg_t' the type of a single GP register) and `elf_fpregset_t' |
| for the floating-point registers. |
| |
| Those types used to be available under the names `gregset_t' and |
| `fpregset_t' too, and this file used those names in the past. But |
| those names are now used for the register sets used in the |
| `mcontext_t' type, and have a different size and layout. */ |
| |
| /* Mapping between the general-purpose registers in `struct user' |
| format and GDB's register array layout. Note that we map the |
| first 56 registers (0 thru 55) one-to-one. GDB maps the pc to |
| slot 64, but ptrace returns it in slot 56. */ |
| static const int regmap[] = |
| { |
| 0, 1, 2, 3, 4, 5, 6, 7, |
| 8, 9, 10, 11, 12, 13, 14, 15, |
| 16, 17, 18, 19, 20, 21, 22, 23, |
| 24, 25, 26, 27, 28, 29, 30, 31, |
| 32, 33, 34, 35, 36, 37, 38, 39, |
| 40, 41, 42, 43, 44, 45, 46, 47, |
| 48, 49, 50, 51, 52, 53, 54, 55, |
| -1, -1, -1, -1, -1, -1, -1, -1, |
| 56, 58 |
| }; |
| |
| /* Transfering the general-purpose registers between GDB, inferiors |
| and core files. */ |
| |
| /* Fill GDB's register array with the general-purpose register values |
| in *GREGSETP. */ |
| |
| void |
| supply_gregset (struct regcache* regcache, |
| const elf_gregset_t *gregsetp) |
| { |
| elf_greg_t *regp = (elf_greg_t *) gregsetp; |
| int i; |
| |
| for (i = 0; i < sizeof (regmap) / sizeof (regmap[0]); i++) |
| if (regmap[i] >= 0) |
| regcache->raw_supply (i, regp + regmap[i]); |
| } |
| |
| /* Fill registers in *GREGSETPS with the values in GDB's |
| register array. */ |
| |
| void |
| fill_gregset (const struct regcache* regcache, |
| elf_gregset_t *gregsetp, int regno) |
| { |
| elf_greg_t *regp = (elf_greg_t *) gregsetp; |
| int i; |
| |
| for (i = 0; i < sizeof (regmap) / sizeof (regmap[0]); i++) |
| if (regmap[i] >= 0) |
| regcache->raw_collect (i, regp + regmap[i]); |
| } |
| |
| /* Transfering floating-point registers between GDB, inferiors and cores. */ |
| |
| /* Fill GDB's register array with the floating-point register values in |
| *FPREGSETP. */ |
| |
| void |
| supply_fpregset (struct regcache *regcache, |
| const elf_fpregset_t *fpregsetp) |
| { |
| /* NOTE: There are no floating-point registers for TILE-Gx. */ |
| } |
| |
| /* Fill register REGNO (if it is a floating-point register) in |
| *FPREGSETP with the value in GDB's register array. If REGNO is -1, |
| do this for all registers. */ |
| |
| void |
| fill_fpregset (const struct regcache *regcache, |
| elf_fpregset_t *fpregsetp, int regno) |
| { |
| /* NOTE: There are no floating-point registers for TILE-Gx. */ |
| } |
| |
| /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
| for all registers. */ |
| |
| void |
| tilegx_linux_nat_target::fetch_registers (struct regcache *regcache, |
| int regnum) |
| { |
| elf_gregset_t regs; |
| pid_t tid = get_ptrace_pid (regcache->ptid ()); |
| |
| if (ptrace (PTRACE_GETREGS, tid, 0, (PTRACE_TYPE_ARG3) ®s) < 0) |
| perror_with_name (_("Couldn't get registers")); |
| |
| supply_gregset (regcache, (const elf_gregset_t *)®s); |
| } |
| |
| /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
| this for all registers. */ |
| |
| void |
| tilegx_linux_nat_target::store_registers (struct regcache *regcache, |
| int regnum) |
| { |
| elf_gregset_t regs; |
| pid_t tid = get_ptrace_pid (regcache->ptid ()); |
| |
| if (ptrace (PTRACE_GETREGS, tid, 0, (PTRACE_TYPE_ARG3) ®s) < 0) |
| perror_with_name (_("Couldn't get registers")); |
| |
| fill_gregset (regcache, ®s, regnum); |
| |
| if (ptrace (PTRACE_SETREGS, tid, 0, (PTRACE_TYPE_ARG3) ®s) < 0) |
| perror_with_name (_("Couldn't write registers")); |
| } |
| |
| void _initialize_tile_linux_nat (); |
| void |
| _initialize_tile_linux_nat () |
| { |
| linux_target = &the_tilegx_linux_nat_target; |
| add_inf_child_target (&the_tilegx_linux_nat_target); |
| } |