Tue Dec 8 15:09:44 1998 Edith Epstein <eepstein@sophia.cygnus.com>

        * config/m68k/tm-m68k.h (NUM_FREGS): m68k-linux patch.
          Added NUM_FREGS macro.

        * config/m68k/xm-linux.h: m68k-linux patch. New file.

        * config/m68k/tm-linux.h: m68k-linux patch. New file.

        * config/m68k/nm-linux.h: m68k-linux patch. New file.

        * config/m68k/linux.mt: m68k-linux patch. New file.

        * config/m68k/linux.mh: m68k-linux patch. New file.

        * gdbserver/low-linux.c: m68k-linux patch. Added an ifdef
          that checks the value of __GLIBC to decide whether or
          not to include sys/reg.h.

        * m68klinux-nat.c: m68k-linux patch. New file. Note
          both m68k-tdep.c and m68klinux-nat.c contain definitions
          for supply_gregset and supply_fpregset. The definitions
          in m68k-tdep.c are valid is USE_PROC_FS is defined. Otherwise,
          the definitions in m68klinux-nat.c will be used. This is a
          bit of a hack. The supply_* routines do not belong in
          *_tdep.c files. But, there are several lynx ports that currently
          depend on these definitions.

        * configure.tgt: m68k-linux patch. Added m68*-*-linux*
          gdb_target.

        * configure.host: m68k-linux patch. Added m68*-*-linux*
          gdb_host.

        * Makefile.in: m68k-linux patch. Added compile line for
          m68klinux-nat.o

3 files changed, 151 insertions, 0 deletions

diff --git a/gdb/config/m68k/tm-linux.h b/gdb/config/m68k/tm-linux.h
new file mode 100644
index 0000000..6c11998
--- /dev/null
+++ b/gdb/config/m68k/tm-linux.h
@@ -0,0 +1,109 @@
+/* Definitions to target GDB to Linux on m680x0
+   Copyright (C) 1996,1998 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.  */
+
+/* Number of traps that happen between exec'ing the shell to run an
+   inferior, and when we finally get to the inferior code.  This is 2
+   on most implementations.  */
+
+#define START_INFERIOR_TRAPS_EXPECTED 2
+
+/* The following definitions are appropriate when using the ELF
+   format, where floating point values are returned in fp0, pointer
+   values in a0 and other values in d0.  */
+
+/* Extract from an array REGBUF containing the (raw) register state a
+   function return value of type TYPE, and copy that, in virtual
+   format, into VALBUF.  */
+
+#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
+{									\
+  if (TYPE_CODE (TYPE) == TYPE_CODE_FLT)				\
+    {									\
+       REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE,			\
+				    ((char *) (REGBUF)			\
+				     + REGISTER_BYTE (FP0_REGNUM)),	\
+				    VALBUF);				\
+    }									\
+  else if (TYPE_CODE (TYPE) == TYPE_CODE_PTR)				\
+    memcpy (VALBUF, (char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM),	\
+	    TYPE_LENGTH (TYPE));					\
+  else									\
+    memcpy (VALBUF,							\
+	    ((char *) (REGBUF)						\
+	     + (TYPE_LENGTH (TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH (TYPE))),	\
+	    TYPE_LENGTH (TYPE));					\
+}
+
+/* Write into appropriate registers a function return value of type
+   TYPE, given in virtual format.  */
+
+#define STORE_RETURN_VALUE(TYPE,VALBUF) \
+{									\
+  if (TYPE_CODE (TYPE) == TYPE_CODE_FLT)				\
+    {									\
+      char raw_buffer[REGISTER_RAW_SIZE (FP0_REGNUM)];			\
+      REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buffer);	\
+      write_register_bytes (REGISTER_BYTE (FP0_REGNUM),			\
+			    raw_buffer, TYPE_LENGTH (TYPE));		\
+    }									\
+  else									\
+    {									\
+      if (TYPE_CODE (TYPE) == TYPE_CODE_PTR)				\
+	write_register_bytes (REGISTER_BYTE (A0_REGNUM), VALBUF,	\
+			      TYPE_LENGTH (TYPE));			\
+      write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE));		\
+    }									\
+}
+
+#include "tm-sysv4.h"
+#include "m68k/tm-m68k.h"
+
+/* Extract from an array REGBUF containing the (raw) register state
+   the address in which a function should return its structure value,
+   as a CORE_ADDR (or an expression that can be used as one).  */
+
+#undef EXTRACT_STRUCT_VALUE_ADDRESS
+#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
+  (*(CORE_ADDR *)((char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM)))
+
+/* Offsets (in target ints) into jmp_buf.  */
+
+#define JB_ELEMENT_SIZE 4
+#define JB_PC 7
+
+/* Figure out where the longjmp will land.  Slurp the args out of the stack.
+   We expect the first arg to be a pointer to the jmp_buf structure from which
+   we extract the pc (JB_PC) that we will land at.  The pc is copied into ADDR.
+   This routine returns true on success */
+
+#define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)
+
+/* Offset to saved PC in sigcontext, from <asm/sigcontext.h>.  */
+#define SIGCONTEXT_PC_OFFSET 26
+
+#undef FRAME_SAVED_PC
+#define FRAME_SAVED_PC(FRAME) \
+  (((FRAME)->signal_handler_caller \
+    ? sigtramp_saved_pc (FRAME) \
+    : read_memory_integer ((FRAME)->frame + 4, 4)))
+
+extern CORE_ADDR sigtramp_saved_pc PARAMS ((struct frame_info *));
+
+#define IN_SIGTRAMP(pc,name) in_sigtramp (pc)
+extern int in_sigtramp PARAMS ((CORE_ADDR pc));
diff --git a/gdb/config/m68k/tm-m68k.h b/gdb/config/m68k/tm-m68k.h
index a04e9e4..098500c 100644
--- a/gdb/config/m68k/tm-m68k.h
+++ b/gdb/config/m68k/tm-m68k.h
@@ -104,6 +104,8 @@ extern void m68k_find_saved_regs PARAMS ((struct frame_info *, struct frame_save
 #define NUM_REGS 29
 #endif
 
+#define NUM_FREGS (NUM_REGS-24)
+
 #ifndef REGISTER_BYTES_OK
 #define REGISTER_BYTES_OK(b) \
    ((b) == REGISTER_BYTES_FP \
diff --git a/gdb/config/m68k/xm-linux.h b/gdb/config/m68k/xm-linux.h
new file mode 100644
index 0000000..7266cff
--- /dev/null
+++ b/gdb/config/m68k/xm-linux.h
@@ -0,0 +1,40 @@
+/* Native support for linux, for GDB, the GNU debugger.
+   Copyright (C) 1996,1998 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_LINUX_H
+#define XM_LINUX_H
+
+/* Pick up most of what we need from the generic m68k host include file. */
+
+#include "m68k/xm-m68k.h"
+
+/* This is the amount to subtract from u.u_ar0
+   to get the offset in the core file of the register values.  */
+#define KERNEL_U_ADDR 0x0
+
+#define HAVE_TERMIOS
+#define NEED_POSIX_SETPGID
+
+/* Linux has sigsetjmp and siglongjmp */
+#define HAVE_SIGSETJMP
+
+/* Need R_OK etc, but USG isn't defined.  */
+#include <unistd.h>
+
+#endif	/* #ifndef XM_LINUX_H */