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/* Native-dependent code for OpenBSD/hppa.
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Copyright (C) 2004-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "inferior.h"
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#include "regcache.h"
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#include "target.h"
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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#include "hppa-tdep.h"
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#include "inf-ptrace.h"
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#include "obsd-nat.h"
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struct hppa_obsd_nat_target final : public obsd_nat_target
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{
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void fetch_registers (struct regcache *, int) override;
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void store_registers (struct regcache *, int) override;
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};
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static hppa_obsd_nat_target the_hppa_obsd_nat_target;
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static int
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hppaobsd_gregset_supplies_p (int regnum)
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{
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return (regnum >= HPPA_R0_REGNUM && regnum <= HPPA_CR27_REGNUM);
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}
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static int
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hppaobsd_fpregset_supplies_p (int regnum)
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{
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return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM);
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}
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/* Supply the general-purpose registers stored in GREGS to REGCACHE. */
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static void
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hppaobsd_supply_gregset (struct regcache *regcache, const void *gregs)
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{
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gdb_byte zero[4] = { 0 };
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const char *regs = gregs;
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int regnum;
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regcache->raw_supply (HPPA_R0_REGNUM, &zero);
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for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++)
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regcache->raw_supply (regnum, regs + regnum * 4);
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if (sizeof(struct reg) >= 46 * 4)
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{
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regcache->raw_supply (HPPA_IPSW_REGNUM, regs);
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regcache->raw_supply (HPPA_SAR_REGNUM, regs + 32 * 4);
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regcache->raw_supply (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
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regcache->raw_supply (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
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regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
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regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
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regcache->raw_supply (HPPA_SR0_REGNUM, regs + 37 * 4);
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regcache->raw_supply (HPPA_SR1_REGNUM, regs + 38 * 4);
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regcache->raw_supply (HPPA_SR2_REGNUM, regs + 39 * 4);
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regcache->raw_supply (HPPA_SR3_REGNUM, regs + 40 * 4);
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regcache->raw_supply (HPPA_SR4_REGNUM, regs + 41 * 4);
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regcache->raw_supply (HPPA_SR5_REGNUM, regs + 42 * 4);
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regcache->raw_supply (HPPA_SR6_REGNUM, regs + 43 * 4);
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regcache->raw_supply (HPPA_SR7_REGNUM, regs + 44 * 4);
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regcache->raw_supply (HPPA_CR26_REGNUM, regs + 45 * 4);
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regcache->raw_supply (HPPA_CR27_REGNUM, regs + 46 * 4);
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}
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else
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{
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regcache->raw_supply (HPPA_SAR_REGNUM, regs);
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regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
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regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
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}
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}
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/* Supply the floating-point registers stored in FPREGS to REGCACHE. */
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static void
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hppaobsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
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{
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const char *regs = fpregs;
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int regnum;
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for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM;
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regnum += 2, regs += 8)
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{
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regcache->raw_supply (regnum, regs);
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regcache->raw_supply (regnum + 1, regs + 4);
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}
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}
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/* Collect the general-purpose registers from REGCACHE and store them
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in GREGS. */
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static void
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hppaobsd_collect_gregset (const struct regcache *regcache,
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void *gregs, int regnum)
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{
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char *regs = gregs;
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int i;
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for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++)
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{
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if (regnum == -1 || regnum == i)
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regcache->raw_collect (i, regs + i * 4);
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}
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if (sizeof(struct reg) >= 46 * 4)
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{
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if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
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regcache->raw_collect (HPPA_IPSW_REGNUM, regs);
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if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
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regcache->raw_collect (HPPA_SAR_REGNUM, regs + 32 * 4);
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if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
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regcache->raw_collect (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
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if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
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regcache->raw_collect (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
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if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
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regcache->raw_collect (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
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if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
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regcache->raw_collect (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
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if (regnum == -1 || regnum == HPPA_SR0_REGNUM)
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regcache->raw_collect (HPPA_SR0_REGNUM, regs + 37 * 4);
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if (regnum == -1 || regnum == HPPA_SR1_REGNUM)
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regcache->raw_collect (HPPA_SR1_REGNUM, regs + 38 * 4);
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if (regnum == -1 || regnum == HPPA_SR2_REGNUM)
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regcache->raw_collect (HPPA_SR2_REGNUM, regs + 39 * 4);
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if (regnum == -1 || regnum == HPPA_SR3_REGNUM)
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regcache->raw_collect (HPPA_SR3_REGNUM, regs + 40 * 4);
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if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
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regcache->raw_collect (HPPA_SR4_REGNUM, regs + 41 * 4);
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if (regnum == -1 || regnum == HPPA_SR5_REGNUM)
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regcache->raw_collect (HPPA_SR5_REGNUM, regs + 42 * 4);
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if (regnum == -1 || regnum == HPPA_SR6_REGNUM)
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regcache->raw_collect (HPPA_SR6_REGNUM, regs + 43 * 4);
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if (regnum == -1 || regnum == HPPA_SR7_REGNUM)
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regcache->raw_collect (HPPA_SR7_REGNUM, regs + 44 * 4);
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if (regnum == -1 || regnum == HPPA_CR26_REGNUM)
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regcache->raw_collect (HPPA_CR26_REGNUM, regs + 45 * 4);
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if (regnum == -1 || regnum == HPPA_CR27_REGNUM)
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regcache->raw_collect (HPPA_CR27_REGNUM, regs + 46 * 4);
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}
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else
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{
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if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
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regcache->raw_collect (HPPA_SAR_REGNUM, regs);
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if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
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regcache->raw_collect (HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
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if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
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regcache->raw_collect (HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
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}
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}
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/* Collect the floating-point registers from REGCACHE and store them
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in FPREGS. */
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static void
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hppaobsd_collect_fpregset (struct regcache *regcache,
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void *fpregs, int regnum)
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{
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char *regs = fpregs;
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int i;
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for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8)
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{
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if (regnum == -1 || regnum == i || regnum == i + 1)
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{
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regcache->raw_collect (i, regs);
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regcache->raw_collect (i + 1, regs + 4);
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}
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}
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}
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/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
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for all registers (including the floating-point registers). */
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void
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hppa_obsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
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{
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pid_t pid = regcache->ptid ().pid ();
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if (regnum == -1 || hppaobsd_gregset_supplies_p (regnum))
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{
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struct reg regs;
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if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
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perror_with_name (_("Couldn't get registers"));
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hppaobsd_supply_gregset (regcache, ®s);
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}
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if (regnum == -1 || hppaobsd_fpregset_supplies_p (regnum))
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{
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struct fpreg fpregs;
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if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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perror_with_name (_("Couldn't get floating point status"));
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hppaobsd_supply_fpregset (regcache, &fpregs);
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}
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}
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/* Store register REGNUM back into the inferior. If REGNUM is -1, do
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this for all registers (including the floating-point registers). */
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void
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hppa_obsd_nat_target::store_registers (struct regcache *regcache, int regnum)
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{
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if (regnum == -1 || hppaobsd_gregset_supplies_p (regnum))
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{
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struct reg regs;
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if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
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perror_with_name (_("Couldn't get registers"));
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hppaobsd_collect_gregset (regcache, ®s, regnum);
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if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
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perror_with_name (_("Couldn't write registers"));
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}
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if (regnum == -1 || hppaobsd_fpregset_supplies_p (regnum))
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{
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struct fpreg fpregs;
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if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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perror_with_name (_("Couldn't get floating point status"));
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hppaobsd_collect_fpregset (regcache, &fpregs, regnum);
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if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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perror_with_name (_("Couldn't write floating point status"));
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}
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}
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void _initialize_hppaobsd_nat ();
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void
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_initialize_hppaobsd_nat ()
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{
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add_inf_child_target (&the_hppa_obsd_nat_target);
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}
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