Unable to build x86 hosted debugger for ARM Linux, due to missing target

dependencies.  Created ARM Linux specific arm-linux-tdep.c file and moved
missing code into it from arm-linux-nat.c.

2000-04-05  Scott Bambrough <scottb@netwinder.org>

	* arm-linux-tdep.c: New file.
	* arm-linux-nat.c (fetch_fpregs): Remove unused code.
	  (arm_get_longjmp_target): Moved it and all defines
	  it uses to arm-linux-tdep.c.
	  (arm_linux_extract_return_value): Moved to
	  arm-linux-tdep.c.
	* config/arm/linux.mt: Add arm-linux-tdep.c to TDEPFILES.

1 files changed, 81 insertions, 0 deletions

diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c
new file mode 100644
index 00000000000..76becf71c96
--- /dev/null
+++ b/gdb/arm-linux-tdep.c
@@ -0,0 +1,81 @@
+/* GNU/Linux on ARM target support.
+   Copyright 1999, 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 "symtab.h"
+#include "gdbtypes.h"
+
+#ifdef GET_LONGJMP_TARGET
+
+/* Figure out where the longjmp will land.  We expect that we have
+   just entered longjmp and haven't yet altered r0, r1, so the
+   arguments are still in the registers.  (A1_REGNUM) points at 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 LONGJMP_TARGET_SIZE 	sizeof(int)
+#define JB_ELEMENT_SIZE		sizeof(int)
+#define JB_SL			18
+#define JB_FP			19
+#define JB_SP			20
+#define JB_PC			21
+
+int
+arm_get_longjmp_target (CORE_ADDR * pc)
+{
+  CORE_ADDR jb_addr;
+  char buf[LONGJMP_TARGET_SIZE];
+
+  jb_addr = read_register (A1_REGNUM);
+
+  if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
+			  LONGJMP_TARGET_SIZE))
+    return 0;
+
+  *pc = extract_address (buf, LONGJMP_TARGET_SIZE);
+  return 1;
+}
+
+#endif /* GET_LONGJMP_TARGET */
+
+/* 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.  */
+
+void
+arm_linux_extract_return_value (struct type *type,
+				char regbuf[REGISTER_BYTES],
+				char *valbuf)
+{
+  /* ScottB: This needs to be looked at to handle the different
+     floating point emulators on ARM Linux.  Right now the code
+     assumes that fetch inferior registers does the right thing for
+     GDB.  I suspect this won't handle NWFPE registers correctly, nor
+     will the default ARM version (arm_extract_return_value()).  */
+
+  int regnum = (TYPE_CODE_FLT == TYPE_CODE (type)) ? F0_REGNUM : A1_REGNUM;
+  memcpy (valbuf, &regbuf[REGISTER_BYTE (regnum)], TYPE_LENGTH (type));
+}
+
+void
+_initialize_arm_linux_tdep (void)
+{
+}