| /* Native-dependent code for BSD Unix running on ARM's, for GDB. |
| |
| Copyright (C) 1988-2021 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/>. */ |
| |
| /* We define this to get types like register_t. */ |
| #define _KERNTYPES |
| #include "defs.h" |
| #include "gdbcore.h" |
| #include "inferior.h" |
| #include "regcache.h" |
| #include "target.h" |
| #include <sys/types.h> |
| #include <sys/ptrace.h> |
| #include <sys/sysctl.h> |
| #include <machine/reg.h> |
| #include <machine/frame.h> |
| |
| #include "arm-tdep.h" |
| #include "arm-netbsd-tdep.h" |
| #include "aarch32-tdep.h" |
| #include "inf-ptrace.h" |
| #include "netbsd-nat.h" |
| |
| class arm_netbsd_nat_target final : public nbsd_nat_target |
| { |
| public: |
| /* Add our register access methods. */ |
| void fetch_registers (struct regcache *, int) override; |
| void store_registers (struct regcache *, int) override; |
| const struct target_desc *read_description () override; |
| }; |
| |
| static arm_netbsd_nat_target the_arm_netbsd_nat_target; |
| |
| static void |
| arm_supply_vfpregset (struct regcache *regcache, struct fpreg *fpregset) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (regcache->arch ()); |
| if (tdep->vfp_register_count == 0) |
| return; |
| |
| struct vfpreg &vfp = fpregset->fpr_vfp; |
| for (int regno = 0; regno <= tdep->vfp_register_count; regno++) |
| regcache->raw_supply (regno + ARM_D0_REGNUM, (char *) &vfp.vfp_regs[regno]); |
| |
| regcache->raw_supply (ARM_FPSCR_REGNUM, (char *) &vfp.vfp_fpscr); |
| } |
| |
| static void |
| fetch_register (struct regcache *regcache, int regno) |
| { |
| struct reg inferior_registers; |
| int ret; |
| int lwp = regcache->ptid ().lwp (); |
| |
| ret = ptrace (PT_GETREGS, regcache->ptid ().pid (), |
| (PTRACE_TYPE_ARG3) &inferior_registers, lwp); |
| |
| if (ret < 0) |
| { |
| warning (_("unable to fetch general register")); |
| return; |
| } |
| arm_nbsd_supply_gregset (nullptr, regcache, regno, &inferior_registers, |
| sizeof (inferior_registers)); |
| } |
| |
| static void |
| fetch_fp_register (struct regcache *regcache, int regno) |
| { |
| struct fpreg inferior_fp_registers; |
| int lwp = regcache->ptid ().lwp (); |
| |
| int ret = ptrace (PT_GETFPREGS, regcache->ptid ().pid (), |
| (PTRACE_TYPE_ARG3) &inferior_fp_registers, lwp); |
| |
| struct vfpreg &vfp = inferior_fp_registers.fpr_vfp; |
| |
| if (ret < 0) |
| { |
| warning (_("unable to fetch floating-point register")); |
| return; |
| } |
| |
| struct gdbarch_tdep *tdep = gdbarch_tdep (regcache->arch ()); |
| if (regno == ARM_FPSCR_REGNUM && tdep->vfp_register_count != 0) |
| regcache->raw_supply (ARM_FPSCR_REGNUM, (char *) &vfp.vfp_fpscr); |
| else if (regno >= ARM_D0_REGNUM |
| && regno <= ARM_D0_REGNUM + tdep->vfp_register_count) |
| { |
| regcache->raw_supply (regno, |
| (char *) &vfp.vfp_regs[regno - ARM_D0_REGNUM]); |
| } |
| else |
| warning (_("Invalid register number.")); |
| } |
| |
| static void |
| fetch_fp_regs (struct regcache *regcache) |
| { |
| struct fpreg inferior_fp_registers; |
| int lwp = regcache->ptid ().lwp (); |
| int ret; |
| int regno; |
| |
| ret = ptrace (PT_GETFPREGS, regcache->ptid ().pid (), |
| (PTRACE_TYPE_ARG3) &inferior_fp_registers, lwp); |
| |
| if (ret < 0) |
| { |
| warning (_("unable to fetch general registers")); |
| return; |
| } |
| |
| arm_supply_vfpregset (regcache, &inferior_fp_registers); |
| } |
| |
| void |
| arm_netbsd_nat_target::fetch_registers (struct regcache *regcache, int regno) |
| { |
| if (regno >= 0) |
| { |
| if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM) |
| fetch_register (regcache, regno); |
| else |
| fetch_fp_register (regcache, regno); |
| } |
| else |
| { |
| fetch_register (regcache, -1); |
| fetch_fp_regs (regcache); |
| } |
| } |
| |
| |
| static void |
| store_register (const struct regcache *regcache, int regno) |
| { |
| struct gdbarch *gdbarch = regcache->arch (); |
| struct reg inferior_registers; |
| int lwp = regcache->ptid ().lwp (); |
| int ret; |
| |
| ret = ptrace (PT_GETREGS, regcache->ptid ().pid (), |
| (PTRACE_TYPE_ARG3) &inferior_registers, lwp); |
| |
| if (ret < 0) |
| { |
| warning (_("unable to fetch general registers")); |
| return; |
| } |
| |
| switch (regno) |
| { |
| case ARM_SP_REGNUM: |
| regcache->raw_collect (ARM_SP_REGNUM, (char *) &inferior_registers.r_sp); |
| break; |
| |
| case ARM_LR_REGNUM: |
| regcache->raw_collect (ARM_LR_REGNUM, (char *) &inferior_registers.r_lr); |
| break; |
| |
| case ARM_PC_REGNUM: |
| if (arm_apcs_32) |
| regcache->raw_collect (ARM_PC_REGNUM, |
| (char *) &inferior_registers.r_pc); |
| else |
| { |
| unsigned pc_val; |
| |
| regcache->raw_collect (ARM_PC_REGNUM, (char *) &pc_val); |
| |
| pc_val = gdbarch_addr_bits_remove (gdbarch, pc_val); |
| inferior_registers.r_pc ^= gdbarch_addr_bits_remove |
| (gdbarch, inferior_registers.r_pc); |
| inferior_registers.r_pc |= pc_val; |
| } |
| break; |
| |
| case ARM_PS_REGNUM: |
| if (arm_apcs_32) |
| regcache->raw_collect (ARM_PS_REGNUM, |
| (char *) &inferior_registers.r_cpsr); |
| else |
| { |
| unsigned psr_val; |
| |
| regcache->raw_collect (ARM_PS_REGNUM, (char *) &psr_val); |
| |
| psr_val ^= gdbarch_addr_bits_remove (gdbarch, psr_val); |
| inferior_registers.r_pc = gdbarch_addr_bits_remove |
| (gdbarch, inferior_registers.r_pc); |
| inferior_registers.r_pc |= psr_val; |
| } |
| break; |
| |
| default: |
| regcache->raw_collect (regno, (char *) &inferior_registers.r[regno]); |
| break; |
| } |
| |
| ret = ptrace (PT_SETREGS, regcache->ptid ().pid (), |
| (PTRACE_TYPE_ARG3) &inferior_registers, lwp); |
| |
| if (ret < 0) |
| warning (_("unable to write register %d to inferior"), regno); |
| } |
| |
| static void |
| store_regs (const struct regcache *regcache) |
| { |
| struct gdbarch *gdbarch = regcache->arch (); |
| struct reg inferior_registers; |
| int lwp = regcache->ptid ().lwp (); |
| int ret; |
| int regno; |
| |
| |
| for (regno = ARM_A1_REGNUM; regno < ARM_SP_REGNUM; regno++) |
| regcache->raw_collect (regno, (char *) &inferior_registers.r[regno]); |
| |
| regcache->raw_collect (ARM_SP_REGNUM, (char *) &inferior_registers.r_sp); |
| regcache->raw_collect (ARM_LR_REGNUM, (char *) &inferior_registers.r_lr); |
| |
| if (arm_apcs_32) |
| { |
| regcache->raw_collect (ARM_PC_REGNUM, (char *) &inferior_registers.r_pc); |
| regcache->raw_collect (ARM_PS_REGNUM, |
| (char *) &inferior_registers.r_cpsr); |
| } |
| else |
| { |
| unsigned pc_val; |
| unsigned psr_val; |
| |
| regcache->raw_collect (ARM_PC_REGNUM, (char *) &pc_val); |
| regcache->raw_collect (ARM_PS_REGNUM, (char *) &psr_val); |
| |
| pc_val = gdbarch_addr_bits_remove (gdbarch, pc_val); |
| psr_val ^= gdbarch_addr_bits_remove (gdbarch, psr_val); |
| |
| inferior_registers.r_pc = pc_val | psr_val; |
| } |
| |
| ret = ptrace (PT_SETREGS, regcache->ptid ().pid (), |
| (PTRACE_TYPE_ARG3) &inferior_registers, lwp); |
| |
| if (ret < 0) |
| warning (_("unable to store general registers")); |
| } |
| |
| static void |
| store_fp_register (const struct regcache *regcache, int regno) |
| { |
| struct fpreg inferior_fp_registers; |
| int lwp = regcache->ptid ().lwp (); |
| int ret = ptrace (PT_GETFPREGS, regcache->ptid ().pid (), |
| (PTRACE_TYPE_ARG3) &inferior_fp_registers, lwp); |
| struct vfpreg &vfp = inferior_fp_registers.fpr_vfp; |
| |
| if (ret < 0) |
| { |
| warning (_("unable to fetch floating-point registers")); |
| return; |
| } |
| |
| struct gdbarch_tdep *tdep = gdbarch_tdep (regcache->arch ()); |
| if (regno == ARM_FPSCR_REGNUM && tdep->vfp_register_count != 0) |
| regcache->raw_collect (ARM_FPSCR_REGNUM, (char *) &vfp.vfp_fpscr); |
| else if (regno >= ARM_D0_REGNUM |
| && regno <= ARM_D0_REGNUM + tdep->vfp_register_count) |
| { |
| regcache->raw_collect (regno, |
| (char *) &vfp.vfp_regs[regno - ARM_D0_REGNUM]); |
| } |
| else |
| warning (_("Invalid register number.")); |
| |
| ret = ptrace (PT_SETFPREGS, regcache->ptid ().pid (), |
| (PTRACE_TYPE_ARG3) &inferior_fp_registers, lwp); |
| |
| if (ret < 0) |
| warning (_("unable to write register %d to inferior"), regno); |
| } |
| |
| static void |
| store_fp_regs (const struct regcache *regcache) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (regcache->arch ()); |
| int lwp = regcache->ptid ().lwp (); |
| if (tdep->vfp_register_count == 0) |
| return; |
| |
| struct fpreg fpregs; |
| for (int regno = 0; regno <= tdep->vfp_register_count; regno++) |
| regcache->raw_collect |
| (regno + ARM_D0_REGNUM, (char *) &fpregs.fpr_vfp.vfp_regs[regno]); |
| |
| regcache->raw_collect (ARM_FPSCR_REGNUM, |
| (char *) &fpregs.fpr_vfp.vfp_fpscr); |
| |
| int ret = ptrace (PT_SETFPREGS, regcache->ptid ().pid (), |
| (PTRACE_TYPE_ARG3) &fpregs, lwp); |
| |
| if (ret < 0) |
| warning (_("unable to store floating-point registers")); |
| } |
| |
| void |
| arm_netbsd_nat_target::store_registers (struct regcache *regcache, int regno) |
| { |
| if (regno >= 0) |
| { |
| if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM) |
| store_register (regcache, regno); |
| else |
| store_fp_register (regcache, regno); |
| } |
| else |
| { |
| store_regs (regcache); |
| store_fp_regs (regcache); |
| } |
| } |
| |
| const struct target_desc * |
| arm_netbsd_nat_target::read_description () |
| { |
| int flag; |
| size_t len = sizeof (flag); |
| |
| if (sysctlbyname("machdep.fpu_present", &flag, &len, NULL, 0) != 0 |
| || !flag) |
| return arm_read_description (ARM_FP_TYPE_NONE); |
| |
| len = sizeof(flag); |
| if (sysctlbyname("machdep.neon_present", &flag, &len, NULL, 0) == 0 && flag) |
| return aarch32_read_description (); |
| |
| return arm_read_description (ARM_FP_TYPE_VFPV3); |
| } |
| |
| void _initialize_arm_netbsd_nat (); |
| void |
| _initialize_arm_netbsd_nat () |
| { |
| add_inf_child_target (&the_arm_netbsd_nat_target); |
| } |