More LynxOS support

1 files changed, 277 insertions, 0 deletions

diff --git a/gdb/m68kly-nat.c b/gdb/m68kly-nat.c
new file mode 100644
index 0000000..057855e
--- /dev/null
+++ b/gdb/m68kly-nat.c
@@ -0,0 +1,277 @@
+/* Native-dependent code for Motorola 680x0 running LynxOS.
+   Copyright 1986, 1987, 1989, 1991, 1993 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "defs.h"
+#include "frame.h"
+#include "inferior.h"
+#include "gdbcore.h"
+#include "target.h"
+
+#include <sys/param.h>
+#include <sys/dir.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <itimer.h>
+#include <mem.h>
+#include <sys/time.h>
+#include <resource.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/ptrace.h>
+#include <kernel.h>
+#include <conf.h>
+#include <proc.h>
+#include <errno.h>
+
+/* Return the address in the core dump or inferior of register REGNO.
+   BLOCKEND is the address of the end of the user structure.  */
+
+static unsigned int
+core_register_addr (regno, blockend)
+     unsigned int regno, blockend;
+{
+  struct st_entry s;
+  unsigned int offset;
+
+  if (regno >= 0 && regno <= FP_REGNUM)
+    offset = (char *) &s.ec.regs[regno] - (char *) &s;
+  else if (regno == SP_REGNUM)
+    offset = (char *) &s.stackp - (char *) &s;
+  else if (regno == PS_REGNUM)
+    offset = (char *) &s.ec.status - (char *) &s;
+  else if (regno == PC_REGNUM)
+    offset = (char *) &s.ec.pc - (char *) &s;
+  else if (regno >= FP0_REGNUM && regno <= (FPC_REGNUM - 1))
+    offset = (char *) &s.ec.fregs[(regno - FP0_REGNUM) * 3] - (char *) &s;
+  else if (regno >= FPC_REGNUM && regno <= FPI_REGNUM)
+    offset = (char *) &s.ec.fcregs[regno - FPC_REGNUM] - (char *) &s;
+
+  return blockend + offset;
+}
+
+unsigned int
+register_addr (regno, blockend)
+     int regno, blockend;
+{
+  struct st_entry s;
+  unsigned int offset;
+
+  if (regno >= 0 && regno <= FP_REGNUM)
+    offset = (char *) &s.ec.regs[regno] - (char *) &s.ec;
+  else if (regno == SP_REGNUM)
+    offset = (char *) &s.stackp - (char *) &s;
+  else if (regno == PS_REGNUM)
+    offset = (char *) &s.ec.status - (char *) &s.ec;
+  else if (regno == PC_REGNUM)
+    offset = (char *) &s.ec.pc - (char *) &s.ec;
+  else if (regno >= FP0_REGNUM && regno <= (FPC_REGNUM - 1))
+    offset = (char *) &s.ec.fregs[(regno - FP0_REGNUM) * 3] - (char *) &s.ec;
+  else if (regno >= FPC_REGNUM && regno <= FPI_REGNUM)
+    offset = (char *) &s.ec.fcregs[regno - FPC_REGNUM] - (char *) &s.ec;
+
+  return blockend + offset;
+}
+
+#ifdef FETCH_INFERIOR_REGISTERS
+
+/* Fetch one register. */
+
+static void
+fetch_register (regno, offset, bpid)
+     int regno, bpid;
+     unsigned int offset;
+{
+  char buf[MAX_REGISTER_RAW_SIZE], mess[128];
+  unsigned int regaddr, i, ptrace_request;
+
+  ptrace_request = regno != SP_REGNUM ? PTRACE_PEEKDATA : PTRACE_PEEKUSP;
+  regaddr = register_addr (regno, offset);
+  for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
+    {
+      errno = 0;
+      *(int *) &buf[i] = ptrace (ptrace_request, bpid,
+				 (PTRACE_ARG3_TYPE) regaddr, 0);
+      if (errno != 0)
+        {
+	  sprintf (mess, "reading register %s (#%d)", reg_names[regno], regno);
+	  perror_with_name (mess);
+        }
+      regaddr += sizeof (int);
+    }
+  supply_register (regno, buf);
+}
+
+static void
+store_register (regno, offset, bpid)
+     int regno, bpid;
+     unsigned int offset;
+{
+  unsigned int i, regaddr, ptrace_request;
+  char mess[128];
+
+  ptrace_request = regno != SP_REGNUM ? PTRACE_POKEUSER : PTRACE_POKEUSP;
+  regaddr = register_addr (regno, offset);
+  for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
+    {
+      errno = 0;
+      ptrace (ptrace_request, bpid, (PTRACE_ARG3_TYPE) regaddr,
+	      *(int *) &registers[REGISTER_BYTE (regno) + i]);
+      if (errno != 0)
+        {
+	  sprintf (mess, "writing register %s (#%d)", reg_names[regno], regno);
+	  perror_with_name (mess);
+        }
+      regaddr += sizeof (int);
+    }
+}
+
+static unsigned int
+fetch_offset (pid, write)
+    int pid, write;
+{
+  struct st_entry s;
+  unsigned int specpage_off, offset = (char *) &s.ecp - (char *) &s;
+
+  if (write)
+    {
+      errno = 0;
+      specpage_off = ptrace (PTRACE_THREADUSER, pid, (PTRACE_ARG3_TYPE) 0, 0);
+      if (errno != 0)
+	perror_with_name ("ptrace");
+      errno = 0;
+      offset = ptrace (PTRACE_PEEKTHREAD, pid, (PTRACE_ARG3_TYPE) offset, 0)
+	  - specpage_off;
+      if (errno != 0)
+	perror_with_name ("ptrace");
+    }
+  else
+    {
+      errno = 0;
+      offset = ptrace (PTRACE_PEEKTHREAD, pid, (PTRACE_ARG3_TYPE) offset, 0);
+      if (errno != 0)
+	perror_with_name ("ptrace");
+    }
+  return offset;
+}
+
+void
+fetch_inferior_registers (regno)
+     int regno;
+{
+  unsigned int offset = fetch_offset (inferior_pid, 0);
+  
+  if (regno == -1)
+    {
+      for (regno = 0; regno < NUM_REGS; regno++)
+	fetch_register (regno, offset, inferior_pid);
+    }
+  else 
+    fetch_register (regno, offset, inferior_pid);
+}
+
+void
+store_inferior_registers (regno)
+     int regno;
+{
+    unsigned int offset = fetch_offset (inferior_pid, 1);
+
+    if (regno == -1)
+      {
+	for (regno = 0; regno < NUM_REGS; regno++)
+	  store_register (regno, offset, inferior_pid);
+      }
+    else
+      store_register (regno, offset, inferior_pid);
+}
+
+void
+fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
+     char *core_reg_sect;
+     unsigned core_reg_size;
+     int which;
+     unsigned int reg_addr;	/* Unused in this version */
+{
+  unsigned int regno;
+
+  for (regno = 0; regno < NUM_REGS; regno++)
+    {
+      unsigned int addr;
+
+      addr = core_register_addr (regno, (unsigned) 0);
+      supply_register (regno, core_reg_sect + addr);
+    }
+}
+#endif	/* FETCH_INFERIOR_REGISTERS */
+
+/* Wait for child to do something.  Return pid of child, or -1 in case
+   of error; store status through argument pointer STATUS.  */
+
+int
+child_wait (pid, status)
+     int pid;
+     int *status;
+{
+  int save_errno;
+  int thread;
+
+  while (1)
+    {
+      int sig;
+
+      if (attach_flag)
+	set_sigint_trap();	/* Causes SIGINT to be passed on to the
+				   attached process. */
+      pid = wait (status);
+      save_errno = errno;
+
+      if (attach_flag)
+	clear_sigint_trap();
+
+      if (pid == -1)
+	{
+	  if (save_errno == EINTR)
+	    continue;
+	  fprintf (stderr, "Child process unexpectedly missing: %s.\n",
+		   safe_strerror (save_errno));
+	  *status = 42;		/* Claim it exited with signal 42 */
+	  return -1;
+	}
+
+      if (pid != PIDGET (inferior_pid))	/* Some other process?!? */
+	continue;
+
+/*      thread = WIFTID (*status);*/
+      thread = *status >> 16;
+
+      /* Initial thread value can only be acquired via wait, so we have to
+	 resort to this hack.  */
+
+      if (TIDGET (inferior_pid) == 0)
+	{
+	  inferior_pid = BUILDPID (inferior_pid, thread);
+	  add_thread (inferior_pid);
+	}
+
+      pid = BUILDPID (pid, thread);
+
+      return pid;
+    }
+}