2013-05-06 Sandra Loosemore <sandra@codesourcery.com>

	    Andrew Jenner  <andrew@codesourcery.com>
	    Chung-Lin Tang  <cltang@codesourcery.com>
	    Julian Brown  <julian@codesourcery.com>

	Based on the nios2-elf port from Altera Corporation.

	gdb/
	* Makefile.in (ALL_TARGET_OBS): Add nios2-tdep.o and
	nios2-linux-tdep.o.
	(HFILES_NO_SRCDIR): Add nios2-tdep.h.
	(ALLDEPFILES): Add nios2-tdep.c and nios2-linux-tdep.c.
	* configure.tgt: Add nios2*-*-linux* and nios2*-*-* targets.
	* nios2-tdep.h: New.
	* nios2-tdep.c: New.
	* nios2-linux-tdep.c: New.
	* features/Makefile (WHICH): Add nios2-linux.
	(nios2-linux-expedite): Set.
	* features/nios2-cpu.xml: New.
	* features/nios2.xml: New.
	* features/nios2-linux.xml: New.
	* features/nios2.c: New (autogenerated).
	* features/nios2-linux.c: New (autogenerated).
	* regformats/nios2-linux.dat: New (autogenerated).
	* NEWS (Changes since GDB 7.6): Add new Nios II targets
	and commands.

	gdb/doc/
	* gdb.texinfo (Nios II): New section.
	(Nios II Features): New section.

1 files changed, 80 insertions, 0 deletions

diff --git a/gdb/nios2-tdep.h b/gdb/nios2-tdep.h
new file mode 100644
index 00000000000..5346b9a41c6
--- /dev/null
+++ b/gdb/nios2-tdep.h
@@ -0,0 +1,80 @@
+/* Target-dependent header for the Nios II architecture, for GDB.
+   Copyright (C) 2012-2013 Free Software Foundation, Inc.
+   Contributed by Mentor Graphics, 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 3 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, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef NIOS2_TDEP_H
+#define NIOS2_TDEP_H
+
+/* Registers.  */
+#define NIOS2_Z_REGNUM 0     /* Zero */
+#define NIOS2_R2_REGNUM 2    /* used for return value */
+#define NIOS2_R3_REGNUM 3    /* used for return value */
+/* Used for hidden zero argument to store ptr to struct return value.  */
+#define NIOS2_R4_REGNUM 4
+#define NIOS2_R7_REGNUM 7
+#define NIOS2_GP_REGNUM 26  /* Global Pointer */
+#define NIOS2_SP_REGNUM 27  /* Stack Pointer */
+#define NIOS2_FP_REGNUM 28  /* Frame Pointer */
+#define NIOS2_EA_REGNUM 29  /* Exception address */
+#define NIOS2_BA_REGNUM 30  /* Breakpoint return address */
+#define NIOS2_RA_REGNUM 31  /* Return address */
+#define NIOS2_PC_REGNUM 32
+
+/* Control registers.  */
+#define NIOS2_STATUS_REGNUM 33
+#define NIOS2_ESTATUS_REGNUM 34
+#define NIOS2_BSTATUS_REGNUM 35
+#define NIOS2_IENABLE_REGNUM 36
+#define NIOS2_IPENDING_REGNUM 37
+#define NIOS2_CPUID_REGNUM 38
+#define NIOS2_EXCEPTION_REGNUM 40
+#define NIOS2_PTEADDR_REGNUM 41
+#define NIOS2_TLBACC_REGNUM 42
+#define NIOS2_TLBMISC_REGNUM 43
+#define NIOS2_ECCINJ_REGNUM 44
+#define NIOS2_BADADDR_REGNUM 45
+#define NIOS2_CONFIG_REGNUM 46
+#define NIOS2_MPUBASE_REGNUM 47
+#define NIOS2_MPUACC_REGNUM 48
+
+/* R4-R7 are used for argument passing.  */
+#define NIOS2_FIRST_ARGREG NIOS2_R4_REGNUM
+#define NIOS2_LAST_ARGREG NIOS2_R7_REGNUM
+
+/* Number of all registers.  */
+#define NIOS2_NUM_REGS 49
+
+/* Size of an instruction, in bytes.  */
+#define NIOS2_OPCODE_SIZE 4
+
+/* Target-dependent structure in gdbarch.  */
+struct gdbarch_tdep
+{
+  /* Assumes FRAME is stopped at a syscall (trap) instruction; returns
+     the expected next PC.  */
+  CORE_ADDR (*syscall_next_pc) (struct frame_info *frame);
+
+  /* Offset to PC value in jump buffer.
+     If this is negative, longjmp support will be disabled.  */
+  int jb_pc;
+};
+
+extern struct target_desc *tdesc_nios2_linux;
+extern struct target_desc *tdesc_nios2;
+
+#endif /* NIOS2_TDEP_H */