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-rw-r--r--gdb/arm-nbsd-nat.c363
1 files changed, 0 insertions, 363 deletions
diff --git a/gdb/arm-nbsd-nat.c b/gdb/arm-nbsd-nat.c
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--- a/gdb/arm-nbsd-nat.c
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-/* Native-dependent code for BSD Unix running on ARM's, for GDB.
-
- Copyright (C) 1988-2020 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-nbsd-tdep.h"
-#include "aarch32-tdep.h"
-#include "inf-ptrace.h"
-#include "nbsd-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);
-}
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