| /* Native-dependent code for OpenBSD/hppa. |
| |
| Copyright (C) 2004-2021 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 "regcache.h" |
| #include "target.h" |
| |
| #include <sys/types.h> |
| #include <sys/ptrace.h> |
| #include <machine/reg.h> |
| |
| #include "hppa-tdep.h" |
| #include "inf-ptrace.h" |
| |
| #include "obsd-nat.h" |
| |
| struct hppa_obsd_nat_target final : public obsd_nat_target |
| { |
| void fetch_registers (struct regcache *, int) override; |
| void store_registers (struct regcache *, int) override; |
| }; |
| |
| static hppa_obsd_nat_target the_hppa_obsd_nat_target; |
| |
| static int |
| hppaobsd_gregset_supplies_p (int regnum) |
| { |
| return (regnum >= HPPA_R0_REGNUM && regnum <= HPPA_CR27_REGNUM); |
| } |
| |
| static int |
| hppaobsd_fpregset_supplies_p (int regnum) |
| { |
| return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM); |
| } |
| |
| /* Supply the general-purpose registers stored in GREGS to REGCACHE. */ |
| |
| static void |
| hppaobsd_supply_gregset (struct regcache *regcache, const void *gregs) |
| { |
| gdb_byte zero[4] = { 0 }; |
| const char *regs = gregs; |
| int regnum; |
| |
| regcache->raw_supply (HPPA_R0_REGNUM, &zero); |
| for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++) |
| regcache->raw_supply (regnum, regs + regnum * 4); |
| |
| if (sizeof(struct reg) >= 46 * 4) |
| { |
| regcache->raw_supply (HPPA_IPSW_REGNUM, regs); |
| regcache->raw_supply (HPPA_SAR_REGNUM, regs + 32 * 4); |
| regcache->raw_supply (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4); |
| regcache->raw_supply (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4); |
| regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4); |
| regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4); |
| regcache->raw_supply (HPPA_SR0_REGNUM, regs + 37 * 4); |
| regcache->raw_supply (HPPA_SR1_REGNUM, regs + 38 * 4); |
| regcache->raw_supply (HPPA_SR2_REGNUM, regs + 39 * 4); |
| regcache->raw_supply (HPPA_SR3_REGNUM, regs + 40 * 4); |
| regcache->raw_supply (HPPA_SR4_REGNUM, regs + 41 * 4); |
| regcache->raw_supply (HPPA_SR5_REGNUM, regs + 42 * 4); |
| regcache->raw_supply (HPPA_SR6_REGNUM, regs + 43 * 4); |
| regcache->raw_supply (HPPA_SR7_REGNUM, regs + 44 * 4); |
| regcache->raw_supply (HPPA_CR26_REGNUM, regs + 45 * 4); |
| regcache->raw_supply (HPPA_CR27_REGNUM, regs + 46 * 4); |
| } |
| else |
| { |
| regcache->raw_supply (HPPA_SAR_REGNUM, regs); |
| regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4); |
| regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4); |
| } |
| } |
| |
| /* Supply the floating-point registers stored in FPREGS to REGCACHE. */ |
| |
| static void |
| hppaobsd_supply_fpregset (struct regcache *regcache, const void *fpregs) |
| { |
| const char *regs = fpregs; |
| int regnum; |
| |
| for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM; |
| regnum += 2, regs += 8) |
| { |
| regcache->raw_supply (regnum, regs); |
| regcache->raw_supply (regnum + 1, regs + 4); |
| } |
| } |
| |
| /* Collect the general-purpose registers from REGCACHE and store them |
| in GREGS. */ |
| |
| static void |
| hppaobsd_collect_gregset (const struct regcache *regcache, |
| void *gregs, int regnum) |
| { |
| char *regs = gregs; |
| int i; |
| |
| for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++) |
| { |
| if (regnum == -1 || regnum == i) |
| regcache->raw_collect (i, regs + i * 4); |
| } |
| |
| if (sizeof(struct reg) >= 46 * 4) |
| { |
| if (regnum == -1 || regnum == HPPA_IPSW_REGNUM) |
| regcache->raw_collect (HPPA_IPSW_REGNUM, regs); |
| if (regnum == -1 || regnum == HPPA_SAR_REGNUM) |
| regcache->raw_collect (HPPA_SAR_REGNUM, regs + 32 * 4); |
| if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM) |
| regcache->raw_collect (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4); |
| if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM) |
| regcache->raw_collect (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4); |
| if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM) |
| regcache->raw_collect (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4); |
| if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM) |
| regcache->raw_collect (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4); |
| if (regnum == -1 || regnum == HPPA_SR0_REGNUM) |
| regcache->raw_collect (HPPA_SR0_REGNUM, regs + 37 * 4); |
| if (regnum == -1 || regnum == HPPA_SR1_REGNUM) |
| regcache->raw_collect (HPPA_SR1_REGNUM, regs + 38 * 4); |
| if (regnum == -1 || regnum == HPPA_SR2_REGNUM) |
| regcache->raw_collect (HPPA_SR2_REGNUM, regs + 39 * 4); |
| if (regnum == -1 || regnum == HPPA_SR3_REGNUM) |
| regcache->raw_collect (HPPA_SR3_REGNUM, regs + 40 * 4); |
| if (regnum == -1 || regnum == HPPA_SR4_REGNUM) |
| regcache->raw_collect (HPPA_SR4_REGNUM, regs + 41 * 4); |
| if (regnum == -1 || regnum == HPPA_SR5_REGNUM) |
| regcache->raw_collect (HPPA_SR5_REGNUM, regs + 42 * 4); |
| if (regnum == -1 || regnum == HPPA_SR6_REGNUM) |
| regcache->raw_collect (HPPA_SR6_REGNUM, regs + 43 * 4); |
| if (regnum == -1 || regnum == HPPA_SR7_REGNUM) |
| regcache->raw_collect (HPPA_SR7_REGNUM, regs + 44 * 4); |
| if (regnum == -1 || regnum == HPPA_CR26_REGNUM) |
| regcache->raw_collect (HPPA_CR26_REGNUM, regs + 45 * 4); |
| if (regnum == -1 || regnum == HPPA_CR27_REGNUM) |
| regcache->raw_collect (HPPA_CR27_REGNUM, regs + 46 * 4); |
| } |
| else |
| { |
| if (regnum == -1 || regnum == HPPA_SAR_REGNUM) |
| regcache->raw_collect (HPPA_SAR_REGNUM, regs); |
| if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM) |
| regcache->raw_collect (HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4); |
| if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM) |
| regcache->raw_collect (HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4); |
| } |
| } |
| |
| /* Collect the floating-point registers from REGCACHE and store them |
| in FPREGS. */ |
| |
| static void |
| hppaobsd_collect_fpregset (struct regcache *regcache, |
| void *fpregs, int regnum) |
| { |
| char *regs = fpregs; |
| int i; |
| |
| for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8) |
| { |
| if (regnum == -1 || regnum == i || regnum == i + 1) |
| { |
| regcache->raw_collect (i, regs); |
| regcache->raw_collect (i + 1, regs + 4); |
| } |
| } |
| } |
| |
| |
| /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
| for all registers (including the floating-point registers). */ |
| |
| void |
| hppa_obsd_nat_target::fetch_registers (struct regcache *regcache, int regnum) |
| { |
| pid_t pid = regcache->ptid ().pid (); |
| |
| if (regnum == -1 || hppaobsd_gregset_supplies_p (regnum)) |
| { |
| struct reg regs; |
| |
| if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| perror_with_name (_("Couldn't get registers")); |
| |
| hppaobsd_supply_gregset (regcache, ®s); |
| } |
| |
| if (regnum == -1 || hppaobsd_fpregset_supplies_p (regnum)) |
| { |
| struct fpreg fpregs; |
| |
| if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| perror_with_name (_("Couldn't get floating point status")); |
| |
| hppaobsd_supply_fpregset (regcache, &fpregs); |
| } |
| } |
| |
| /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
| this for all registers (including the floating-point registers). */ |
| |
| void |
| hppa_obsd_nat_target::store_registers (struct regcache *regcache, int regnum) |
| { |
| if (regnum == -1 || hppaobsd_gregset_supplies_p (regnum)) |
| { |
| struct reg regs; |
| |
| if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| perror_with_name (_("Couldn't get registers")); |
| |
| hppaobsd_collect_gregset (regcache, ®s, regnum); |
| |
| if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| perror_with_name (_("Couldn't write registers")); |
| } |
| |
| if (regnum == -1 || hppaobsd_fpregset_supplies_p (regnum)) |
| { |
| struct fpreg fpregs; |
| |
| if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| perror_with_name (_("Couldn't get floating point status")); |
| |
| hppaobsd_collect_fpregset (regcache, &fpregs, regnum); |
| |
| if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| perror_with_name (_("Couldn't write floating point status")); |
| } |
| } |
| |
| void _initialize_hppaobsd_nat (); |
| void |
| _initialize_hppaobsd_nat () |
| { |
| add_inf_child_target (&the_hppa_obsd_nat_target); |
| } |
