Enable rthreads support on OpenBSD/hppa

gdb/
2015-03-05  Mark Kettenis  <kettenis@gnu.org>

        * hppabsd-nat.c: Remove file.
        * hppaobsd-nat.c: New file.
        * Makefile.in (ALLDEPFILES): Remove hppabsd-nat.c.  Add
        hppaobsd-nat.c.
        * config/pa/obsd.mh (NATDEPFILES): Replace hppabsd-nat.o with
        hppaobsd-nat.o.

1 files changed, 265 insertions, 0 deletions

diff --git a/gdb/hppaobsd-nat.c b/gdb/hppaobsd-nat.c
new file mode 100644
index 0000000..fe49b99
--- /dev/null
+++ b/gdb/hppaobsd-nat.c
@@ -0,0 +1,265 @@
+/* Native-dependent code for OpenBSD/hppa.
+
+   Copyright (C) 2004-2015 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"
+
+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 (regcache, HPPA_R0_REGNUM, &zero);
+  for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++)
+    regcache_raw_supply (regcache, regnum, regs + regnum * 4);
+
+  if (sizeof(struct reg) >= 46 * 4)
+    {
+      regcache_raw_supply (regcache, HPPA_IPSW_REGNUM, regs);
+      regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
+      regcache_raw_supply (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
+      regcache_raw_supply (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
+      regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
+      regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
+      regcache_raw_supply (regcache, HPPA_SR0_REGNUM, regs + 37 * 4);
+      regcache_raw_supply (regcache, HPPA_SR1_REGNUM, regs + 38 * 4);
+      regcache_raw_supply (regcache, HPPA_SR2_REGNUM, regs + 39 * 4);
+      regcache_raw_supply (regcache, HPPA_SR3_REGNUM, regs + 40 * 4);
+      regcache_raw_supply (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
+      regcache_raw_supply (regcache, HPPA_SR5_REGNUM, regs + 42 * 4);
+      regcache_raw_supply (regcache, HPPA_SR6_REGNUM, regs + 43 * 4);
+      regcache_raw_supply (regcache, HPPA_SR7_REGNUM, regs + 44 * 4);
+      regcache_raw_supply (regcache, HPPA_CR26_REGNUM, regs + 45 * 4);
+      regcache_raw_supply (regcache, HPPA_CR27_REGNUM, regs + 46 * 4);
+    } 
+  else
+    {
+      regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
+      regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
+      regcache_raw_supply (regcache, 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 (regcache, regnum, regs);
+      regcache_raw_supply (regcache, 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 (regcache, i, regs + i * 4);
+    }
+
+  if (sizeof(struct reg) >= 46 * 4)
+    {
+      if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
+	regcache_raw_collect (regcache, HPPA_IPSW_REGNUM, regs);
+      if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
+	regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
+      if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
+	regcache_raw_collect (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
+      if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
+	regcache_raw_collect (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
+      if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
+	regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
+      if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
+	regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
+      if (regnum == -1 || regnum == HPPA_SR0_REGNUM)
+	regcache_raw_collect (regcache, HPPA_SR0_REGNUM, regs + 37 * 4);
+      if (regnum == -1 || regnum == HPPA_SR1_REGNUM)
+	regcache_raw_collect (regcache, HPPA_SR1_REGNUM, regs + 38 * 4);
+      if (regnum == -1 || regnum == HPPA_SR2_REGNUM)
+	regcache_raw_collect (regcache, HPPA_SR2_REGNUM, regs + 39 * 4);
+      if (regnum == -1 || regnum == HPPA_SR3_REGNUM)
+	regcache_raw_collect (regcache, HPPA_SR3_REGNUM, regs + 40 * 4);
+      if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
+	regcache_raw_collect (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
+      if (regnum == -1 || regnum == HPPA_SR5_REGNUM)
+	regcache_raw_collect (regcache, HPPA_SR5_REGNUM, regs + 42 * 4);
+      if (regnum == -1 || regnum == HPPA_SR6_REGNUM)
+	regcache_raw_collect (regcache, HPPA_SR6_REGNUM, regs + 43 * 4);
+      if (regnum == -1 || regnum == HPPA_SR7_REGNUM)
+	regcache_raw_collect (regcache, HPPA_SR7_REGNUM, regs + 44 * 4);
+      if (regnum == -1 || regnum == HPPA_CR26_REGNUM)
+	regcache_raw_collect (regcache, HPPA_CR26_REGNUM, regs + 45 * 4);
+      if (regnum == -1 || regnum == HPPA_CR27_REGNUM)
+	regcache_raw_collect (regcache, HPPA_CR27_REGNUM, regs + 46 * 4);
+    }
+  else
+    {
+      if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
+	regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs);
+      if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
+	regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
+      if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
+	regcache_raw_collect (regcache, 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 (regcache, i, regs);
+	  regcache_raw_collect (regcache, i + 1, regs + 4);
+	}
+    }
+}
+
+
+/* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
+   for all registers (including the floating-point registers).  */
+
+static void
+hppaobsd_fetch_registers (struct target_ops *ops,
+			  struct regcache *regcache, int regnum)
+{
+  if (regnum == -1 || hppaobsd_gregset_supplies_p (regnum))
+    {
+      struct reg regs;
+
+      if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
+		  (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, ptid_get_pid (inferior_ptid),
+		  (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).  */
+
+static void
+hppaobsd_store_registers (struct target_ops *ops,
+			  struct regcache *regcache, int regnum)
+{
+  if (regnum == -1 || hppaobsd_gregset_supplies_p (regnum))
+    {
+      struct reg regs;
+
+      if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
+                  (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+        perror_with_name (_("Couldn't get registers"));
+
+      hppaobsd_collect_gregset (regcache, &regs, regnum);
+
+      if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid),
+	          (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, ptid_get_pid (inferior_ptid),
+		  (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, ptid_get_pid (inferior_ptid),
+		  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+	perror_with_name (_("Couldn't write floating point status"));
+    }
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes.  */
+void _initialize_hppaobsd_nat (void);
+
+void
+_initialize_hppaobsd_nat (void)
+{
+  struct target_ops *t;
+
+  t = inf_ptrace_target ();
+  t->to_fetch_registers = hppaobsd_fetch_registers;
+  t->to_store_registers = hppaobsd_store_registers;
+  obsd_add_target (t);
+}