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- /* Native-dependent code for GNU/Linux TILE-Gx.
- Copyright (C) 2012-2022 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);
- }
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