* i386ly-nat.c, i386lynx-nat.c, m68kly-nat.c: Remove. Move

	common code into lynx-nat.c.
	* lynx-nat.c:  New module.  Contains portable code for Lynx native
	stuff (mostly ptrace related).
	* config/i386/i386lynx.mh (NATDEPFILES):  i386ly-nat.o -> lynx-nat.o
	* config/m68k/m68klynx.mh (NATDEPFILES):  i386ly-nat.o -> lynx-nat.o

	* config/nm-lynx.h, config/tm-lynx.h:  New files to contain
	non-architecture specific native and target defs.
	* config/i386/nm-i386lynx.h, config/i386/tm-i386lynx.h,
	config/m68k/nm-m68klynx.h, config/m68k/tm-m68klynx.h:  Move all
	(arch) portable stuff into ../{tm nm}-lynx.h.

1 files changed, 310 insertions, 0 deletions

diff --git a/gdb/lynx-nat.c b/gdb/lynx-nat.c
new file mode 100644
index 0000000..8b2c7c8
--- /dev/null
+++ b/gdb/lynx-nat.c
@@ -0,0 +1,310 @@
+/* Native-dependent code for LynxOS.
+   Copyright 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 "target.h"
+
+#include <sys/ptrace.h>
+#include "/usr/include/sys/wait.h"
+
+static unsigned long registers_addr PARAMS ((int pid));
+
+#define X(ENTRY)(offsetof(struct econtext, ENTRY))
+
+#ifdef I386
+/* Mappings from tm-i386v.h */
+
+static int regmap[] =
+{
+  X(eax),
+  X(ecx),
+  X(edx),
+  X(ebx),
+  X(esp),			/* sp */
+  X(ebp),			/* fp */
+  X(esi),
+  X(edi),
+  X(eip),			/* pc */
+  X(flags),			/* ps */
+  X(cs),
+  X(ss),
+  X(ds),
+  X(es),
+  X(ecode),			/* Lynx doesn't give us either fs or gs, so */
+  X(fault),			/* we just substitute these two in the hopes
+				   that they are useful. */
+};
+#endif
+
+#ifdef M68K
+/* Mappings from tm-m68k.h */
+
+static int regmap[] =
+{
+  X(regs[0]),			/* d0 */
+  X(regs[1]),			/* d1 */
+  X(regs[2]),			/* d2 */
+  X(regs[3]),			/* d3 */
+  X(regs[4]),			/* d4 */
+  X(regs[5]),			/* d5 */
+  X(regs[6]),			/* d6 */
+  X(regs[7]),			/* d7 */
+  X(regs[8]),			/* a0 */
+  X(regs[9]),			/* a1 */
+  X(regs[10]),			/* a2 */
+  X(regs[11]),			/* a3 */
+  X(regs[12]),			/* a4 */
+  X(regs[13]),			/* a5 */
+  X(regs[14]),			/* fp */
+  offsetof (st_t, usp) - offsetof (st_t, ec), /* sp */
+  X(status),			/* ps */
+  X(pc),
+
+  X(fregs[0*3]),		/* fp0 */
+  X(fregs[1*3]),		/* fp1 */
+  X(fregs[2*3]),		/* fp2 */
+  X(fregs[3*3]),		/* fp3 */
+  X(fregs[4*3]),		/* fp4 */
+  X(fregs[5*3]),		/* fp5 */
+  X(fregs[6*3]),		/* fp6 */
+  X(fregs[7*3]),		/* fp7 */
+
+  X(fcregs[0]),			/* fpcontrol */
+  X(fcregs[1]),			/* fpstatus */
+  X(fcregs[2]),			/* fpiaddr */
+  X(ssw),			/* fpcode */
+  X(fault),			/* fpflags */
+};
+#endif
+
+/* Return the offset relative to the start of the per-thread data to the
+   saved context block.  */
+
+static unsigned long
+registers_addr(pid)
+     int pid;
+{
+  CORE_ADDR stblock;
+  int ecpoff = offsetof(st_t, ecp);
+  CORE_ADDR ecp;
+
+  errno = 0;
+  stblock = (CORE_ADDR) ptrace (PTRACE_THREADUSER, pid, (PTRACE_ARG3_TYPE)0,
+				0);
+  if (errno)
+    perror_with_name ("registers_addr(PTRACE_THREADUSER)");
+
+  ecp = (CORE_ADDR) ptrace (PTRACE_PEEKTHREAD, pid, (PTRACE_ARG3_TYPE)ecpoff,
+			    0);
+  if (errno)
+    perror_with_name ("registers_addr(PTRACE_PEEKTHREAD)");
+
+  return ecp - stblock;
+}
+
+/* Fetch one or more registers from the inferior.  REGNO == -1 to get
+   them all.  We actually fetch more than requested, when convenient,
+   marking them as valid so we won't fetch them again.  */
+
+void
+fetch_inferior_registers (regno)
+     int regno;
+{
+  int reglo, reghi;
+  int i;
+  unsigned long ecp;
+
+  if (regno == -1)
+    {
+      reglo = 0;
+      reghi = NUM_REGS - 1;
+    }
+  else
+    reglo = reghi = regno;
+
+  ecp = registers_addr (inferior_pid);
+
+  for (regno = reglo; regno <= reghi; regno++)
+    {
+      char buf[MAX_REGISTER_RAW_SIZE];
+      int ptrace_fun = PTRACE_PEEKTHREAD;
+
+#ifdef PTRACE_PEEKUSP
+      ptrace_fun = regno == SP_REGNUM ? PTRACE_PEEKUSP : PTRACE_PEEKTHREAD;
+#endif
+
+      for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
+	{
+	  unsigned int reg;
+
+	  errno = 0;
+	  reg = ptrace (ptrace_fun, inferior_pid,
+			(PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), 0);
+	  if (errno)
+	    perror_with_name ("fetch_inferior_registers(ptrace)");
+  
+	  *(int *)&buf[i] = reg;
+	}
+      supply_register (regno, buf);
+    }
+}
+
+/* Store our register values back into the inferior.
+   If REGNO is -1, do this for all registers.
+   Otherwise, REGNO specifies which register (so we can save time).  */
+
+void
+store_inferior_registers (regno)
+     int regno;
+{
+  int reglo, reghi;
+  int i;
+  unsigned long ecp;
+
+  if (regno == -1)
+    {
+      reglo = 0;
+      reghi = NUM_REGS - 1;
+    }
+  else
+    reglo = reghi = regno;
+
+  ecp = registers_addr (inferior_pid);
+
+  for (regno = reglo; regno <= reghi; regno++)
+    {
+      int ptrace_fun = PTRACE_POKEUSER;
+
+#ifdef PTRACE_POKEUSP
+      ptrace_fun = regno == SP_REGNUM ? PTRACE_POKEUSP : PTRACE_POKEUSER;
+#endif
+
+      for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
+	{
+	  unsigned int reg;
+
+	  reg = *(unsigned int *)&registers[REGISTER_BYTE (regno) + i];
+
+	  errno = 0;
+	  ptrace (ptrace_fun, inferior_pid,
+		  (PTRACE_ARG3_TYPE) (ecp + regmap[regno] + i), reg);
+	  if (errno)
+	    perror_with_name ("PTRACE_POKEUSER");
+	}
+    }
+}
+
+/* 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_unfiltered (gdb_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;
+    }
+}
+
+/* Convert a Lynx process ID to a string.  Returns the string in a static
+   buffer.  */
+
+char *
+lynx_pid_to_str (pid)
+     int pid;
+{
+  static char buf[40];
+
+  sprintf (buf, "process %d thread %d", PIDGET (pid), TIDGET (pid));
+
+  return buf;
+}
+
+/* Extract the register values out of the core file and store
+   them where `read_register' will find them.
+
+   CORE_REG_SECT points to the register values themselves, read into memory.
+   CORE_REG_SIZE is the size of that area.
+   WHICH says which set of registers we are handling (0 = int, 2 = float
+         on machines where they are discontiguous).
+   REG_ADDR is the offset from u.u_ar0 to the register values relative to
+            core_reg_sect.  This is used with old-fashioned core files to
+	    locate the registers in a large upage-plus-stack ".reg" section.
+	    Original upage address X is at location core_reg_sect+x+reg_addr.
+ */
+
+void
+fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
+     char *core_reg_sect;
+     unsigned core_reg_size;
+     int which;
+     unsigned reg_addr;
+{
+  struct st_entry s;
+  unsigned int regno;
+
+  for (regno = 0; regno < NUM_REGS; regno++)
+    supply_register (regno, core_reg_sect + offsetof (st_t, ec)
+		     + regmap[regno]);
+}