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binutils-gdb/gdb/hppa-obsd-nat.c

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/* Native-dependent code for OpenBSD/hppa.
Copyright (C) 2004-2018 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) &regs, 0) == -1)
perror_with_name (_("Couldn't get registers"));
hppaobsd_supply_gregset (regcache, &regs);
}
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) &regs, 0) == -1)
perror_with_name (_("Couldn't get registers"));
hppaobsd_collect_gregset (regcache, &regs, regnum);
if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 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)
{
add_inf_child_target (&the_hppa_obsd_nat_target);
}
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