[PATCH] FreeBSD/Alpha support

[Mark Kettenis <kettenis at wins dot uva dot nl>]

I checked in support for FreeBSD/Alpha.  This is tested on FreeBSD
5.0-CURRENT, but it should work on FreeBSD 4.x just as well.

I'll put some blurp in the NEWS file (which reminds me that I still
have to do this for FreeBSD/i386 too).

Mark


2000-05-31  Mark Kettenis  <kettenis@gnu.org>

	Add support for FreeBSD/Alpha.
	* alphabsd-nat.c, config/alpha/fbsd.mh, config/alpha/fbsd.mt,
	config/alpha/nm-fbsd.h, config/alpha/tm-fbsd.h,
	config/alpha/xm-fbsd.h: New files.


--- /dev/null	Thu Feb 19 16:30:24 1998
+++ alphabsd-nat.c	Wed May 31 14:55:43 2000
@@ -0,0 +1,187 @@
+/* Native-dependent code for Alpha BSD's.
+   Copyright (C) 2000 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 2 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include "defs.h"
+#include "inferior.h"
+
+#include <sys/types.h>
+#include <sys/ptrace.h>
+#include <machine/reg.h>
+
+#ifdef HAVE_SYS_PROCFS_H
+#include <sys/procfs.h>
+#endif
+
+#ifndef HAVE_GREGSET_T
+typedef struct reg gregset_t;
+#endif
+
+#ifndef HAVE_FPREGSET_T
+typedef struct fpreg fpregset_t;
+#endif
+
+#include "gregset.h"
+
+/* Number of general-purpose registers.  */
+#define NUM_GREGS  32
+
+/* Number of floating point registers.  */
+#define NUM_FPREGS 31
+
+
+/* Transfering the registers between GDB, inferiors and core files.  */
+
+/* Fill GDB's register array with the genereal-purpose register values
+   in *GREGSETP.  */
+
+void
+supply_gregset (gregset_t *gregsetp)
+{
+  int i;
+
+  for (i = 0; i < NUM_GREGS; i++)
+    {
+      if (CANNOT_FETCH_REGISTER (i))
+	supply_register (i, NULL);
+      else
+	supply_register (i, (char *) &gregsetp->r_regs[i]);
+    }
+
+  /* The PC travels in the R_ZERO slot.  */
+  supply_register (PC_REGNUM, (char *) &gregsetp->r_regs[R_ZERO]);
+}
+
+/* Fill register REGNO (if it is a general-purpose register) in
+   *GREGSETPS with the value in GDB's register array.  If REGNO is -1,
+   do this for all registers.  */
+
+void
+fill_gregset (gregset_t *gregsetp, int regno)
+{
+  int i;
+
+  for (i = 0; i < NUM_GREGS; i++)
+    if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i))
+      memcpy (&gregsetp->r_regs[i], &registers[REGISTER_BYTE (i)],
+	      REGISTER_RAW_SIZE (i));
+
+  /* The PC travels in the R_ZERO slot.  */
+  if (regno == -1 || regno == PC_REGNUM)
+    memcpy (&gregsetp->r_regs[R_ZERO], &registers[REGISTER_BYTE (PC_REGNUM)],
+	    REGISTER_RAW_SIZE (PC_REGNUM));
+}
+
+/* Fill GDB's register array with the floating-point register values
+   in *FPREGSETP.  */
+
+void
+supply_fpregset (fpregset_t *fpregsetp)
+{
+  int i;
+
+  for (i = FP0_REGNUM; i < FP0_REGNUM + NUM_FPREGS; i++)
+    {
+      if (CANNOT_FETCH_REGISTER (i))
+	supply_register (i, NULL);
+      else
+	supply_register (i, (char *) &fpregsetp->fpr_regs[i]);
+    }
+
+  supply_register (FPCR_REGNUM, (char *) &fpregsetp->fpr_cr);
+}
+
+/* Fill register REGNO (if it is a floating-point register) in
+   *FPREGSETP with the value in GDB's register array.  If REGNO is -1,
+   do this for all registers.  */
+
+void
+fill_fpregset (fpregset_t *fpregsetp, int regno)
+{
+  int i;
+
+  for (i = FP0_REGNUM; i < FP0_REGNUM + NUM_FPREGS; i++)
+    if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i))
+      memcpy (&fpregsetp->fpr_regs[i - FP0_REGNUM],
+	      &registers[REGISTER_BYTE (i)], REGISTER_RAW_SIZE (i));
+
+  if (regno == -1 || regno == FPCR_REGNUM)
+    memcpy (&fpregsetp->fpr_cr, &registers[REGISTER_BYTE (FPCR_REGNUM)],
+	    REGISTER_RAW_SIZE (FPCR_REGNUM));
+}
+
+/* Fetch register REGNO from the inferior.  If REGNO is -1, do this
+   for all registers (including the floating point registers).  */
+
+void
+fetch_inferior_registers (int regno)
+{
+  gregset_t gregs;
+
+  if (ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
+    perror_with_name ("Couldn't get registers");
+
+  supply_gregset (&gregs);
+
+  if (regno == -1 || regno >= FP0_REGNUM)
+    {
+      fpregset_t fpregs;
+
+      if (ptrace (PT_GETFPREGS, inferior_pid,
+		  (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
+	perror_with_name ("Couldn't get floating point status");
+
+      supply_fpregset (&fpregs);
+    }
+
+  /* Reset virtual frame pointer.  */
+  supply_register (FP_REGNUM, NULL);
+}
+
+/* Store register REGNO back into the inferior.  If REGNO is -1, do
+   this for all registers (including the floating point registers).  */
+
+void
+store_inferior_registers (int regno)
+{
+  gregset_t gregs;
+
+  if (ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
+    perror_with_name ("Couldn't get registers");
+
+  fill_gregset (&gregs, regno);
+
+  if (ptrace (PT_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1)
+    perror_with_name ("Couldn't write registers");
+
+  if (regno == -1 || regno >= FP0_REGNUM)
+    {
+      fpregset_t fpregs;
+
+      if (ptrace (PT_GETFPREGS, inferior_pid,
+		  (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
+	perror_with_name ("Couldn't get floating point status");
+
+      fill_fpregset (&fpregs, regno);
+
+      if (ptrace (PT_SETFPREGS, inferior_pid,
+		  (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
+	perror_with_name ("Couldn't write floating point status");
+    }
+}
--- /dev/null	Thu Feb 19 16:30:24 1998
+++ config/alpha/fbsd.mh	Fri May 26 21:46:06 2000
@@ -0,0 +1,6 @@
+# Host: FreeBSD/Alpha
+XDEPFILES= ser-tcp.o
+NATDEPFILES= fork-child.o infptrace.o inftarg.o solib.o \
+	corelow.o core-regset.o alphabsd-nat.o
+XM_FILE= xm-fbsd.h
+NAT_FILE= nm-fbsd.h
--- /dev/null	Thu Feb 19 16:30:24 1998
+++ config/alpha/fbsd.mt	Fri May 26 21:44:51 2000
@@ -0,0 +1,3 @@
+# Target: FreeBSD/Alpha
+TDEPFILES= alpha-tdep.o
+TM_FILE= tm-fbsd.h
--- /dev/null	Thu Feb 19 16:30:24 1998
+++ config/alpha/tm-fbsd.h	Sun May 28 01:56:11 2000
@@ -0,0 +1,32 @@
+/* Target-dependent definitions for FreeBSD/Alpha.
+   Copyright (C) 2000 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 2 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef TM_FBSD_H
+#define TM_FBSD_H
+
+#include "alpha/tm-alpha.h"
+
+/* Number of traps that happen between exec'ing the shell to run an
+   inferior, and when we finally get to the inferior code.  The
+   default is right for FreeBSD.  */
+
+#undef START_INFERIOR_TRAPS_EXPECTED
+
+#endif /* TM_FBSD_H */
--- /dev/null	Thu Feb 19 16:30:24 1998
+++ config/alpha/nm-fbsd.h	Fri May 26 21:48:51 2000
@@ -0,0 +1,41 @@
+/* Native-dependent definitions for FreeBSD/Alpha.
+   Copyright (C) 1986, 87, 89, 92, 96, 2000 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 2 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef NM_FBSD_H
+#define NM_FBSD_H
+
+/* Type of the third argument to the `ptrace' system call.  */
+#define PTRACE_ARG3_TYPE caddr_t
+
+/* Override copies of {fetch,store}_inferior_registers in `infptrace.c'.  */
+#define FETCH_INFERIOR_REGISTERS
+
+/* We can attach and detach.  */
+#define ATTACH_DETACH
+
+
+/* Shared library support.  */
+
+#define SVR4_SHARED_LIBS
+
+#include "solib.h"		/* Support for shared libraries. */
+#include "elf/common.h"		/* Additional ELF shared library info. */
+
+#endif /* NM_FBSD_H */
--- /dev/null	Thu Feb 19 16:30:24 1998
+++ config/alpha/xm-fbsd.h	Fri May 26 21:49:24 2000
@@ -0,0 +1,26 @@
+/* Host-dependent definitions for FreeBSD/i386.
+   Copyright (C) 2000 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 2 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef XM_FBSD_H
+#define XM_FBSD_H
+
+#define HOST_BYTE_ORDER LITTLE_ENDIAN
+
+#endif /* XM_FBSD_H */