| /* Native-dependent code for OpenBSD/mips64. |
| |
| Copyright (C) 2004-2024 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 "inferior.h" |
| #include "regcache.h" |
| #include "target.h" |
| |
| #include <sys/types.h> |
| #include <sys/ptrace.h> |
| #include <machine/reg.h> |
| |
| #include "mips-tdep.h" |
| #include "inf-ptrace.h" |
| #include "obsd-nat.h" |
| |
| /* Shorthand for some register numbers used below. */ |
| #define MIPS_PC_REGNUM MIPS_EMBED_PC_REGNUM |
| #define MIPS_FP0_REGNUM MIPS_EMBED_FP0_REGNUM |
| #define MIPS_FSR_REGNUM MIPS_EMBED_FP0_REGNUM + 32 |
| |
| struct mips64_obsd_nat_target final : public obsd_nat_target |
| { |
| void fetch_registers (struct regcache *, int) override; |
| void store_registers (struct regcache *, int) override; |
| }; |
| |
| static mips64_obsd_nat_target the_mips64_obsd_nat_target; |
| |
| /* Supply the general-purpose registers stored in GREGS to REGCACHE. */ |
| |
| static void |
| mips64obsd_supply_gregset (struct regcache *regcache, const void *gregs) |
| { |
| const char *regs = gregs; |
| int regnum; |
| |
| for (regnum = MIPS_ZERO_REGNUM; regnum <= MIPS_PC_REGNUM; regnum++) |
| regcache->raw_supply (regnum, regs + regnum * 8); |
| |
| for (regnum = MIPS_FP0_REGNUM; regnum <= MIPS_FSR_REGNUM; regnum++) |
| regcache->raw_supply (regnum, regs + (regnum + 2) * 8); |
| } |
| |
| /* Collect the general-purpose registers from REGCACHE and store them |
| in GREGS. */ |
| |
| static void |
| mips64obsd_collect_gregset (const struct regcache *regcache, |
| void *gregs, int regnum) |
| { |
| char *regs = gregs; |
| int i; |
| |
| for (i = MIPS_ZERO_REGNUM; i <= MIPS_PC_REGNUM; i++) |
| { |
| if (regnum == -1 || regnum == i) |
| regcache->raw_collect (i, regs + i * 8); |
| } |
| |
| for (i = MIPS_FP0_REGNUM; i <= MIPS_FSR_REGNUM; i++) |
| { |
| if (regnum == -1 || regnum == i) |
| regcache->raw_collect (i, regs + (i + 2) * 8); |
| } |
| } |
| |
| |
| /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
| for all registers. */ |
| |
| void |
| mips64_obsd_nat_target::fetch_registers (struct regcache *regcache, int regnum) |
| { |
| struct reg regs; |
| pid_t pid = regcache->ptid ().pid (); |
| |
| if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| perror_with_name (_("Couldn't get registers")); |
| |
| mips64obsd_supply_gregset (regcache, ®s); |
| } |
| |
| /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
| this for all registers. */ |
| |
| static void |
| mips64_obsd_nat_target::store_registers (struct regcache *regcache, int regnum) |
| { |
| struct reg regs; |
| pid_t pid = regcache->ptid ().pid (); |
| |
| if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| perror_with_name (_("Couldn't get registers")); |
| |
| mips64obsd_collect_gregset (regcache, ®s, regnum); |
| |
| if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| perror_with_name (_("Couldn't write registers")); |
| } |
| |
| void _initialize_mips64obsd_nat (); |
| void |
| _initialize_mips64obsd_nat () |
| { |
| add_inf_child_target (&the_mips64_obsd_nat_target); |
| } |