Return early in target_xfer_partial when LEN is zero.

[deliverable/binutils-gdb.git] / gdb / m32r-tdep.c

diff --git a/gdb/m32r-tdep.c b/gdb/m32r-tdep.c
index f629ca1b5f48086dd4678f67942ad657bf3ce5db..0ba12768aeef5e25a4949a9a9cd3a15f4ec37204 100644 (file)
--- a/gdb/m32r-tdep.c
+++ b/gdb/m32r-tdep.c
@@ -1,7 +1,6 @@
 /* Target-dependent code for Renesas M32R, for GDB.
 
-   Copyright (C) 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007,
-   2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+   Copyright (C) 1996-2014 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -26,7 +25,7 @@
 #include "gdbtypes.h"
 #include "gdbcmd.h"
 #include "gdbcore.h"
-#include "gdb_string.h"
+#include <string.h>
 #include "value.h"
 #include "inferior.h"
 #include "symfile.h"
@@ -85,7 +84,7 @@ m32r_memory_insert_breakpoint (struct gdbarch *gdbarch,
   CORE_ADDR addr = bp_tgt->placed_address;
   int val;
   gdb_byte buf[4];
-  gdb_byte *contents_cache = bp_tgt->shadow_contents;
+  gdb_byte contents_cache[4];
   gdb_byte bp_entry[] = { 0x10, 0xf1 };        /* dpt */
 
   /* Save the memory contents.  */
@@ -93,6 +92,7 @@ m32r_memory_insert_breakpoint (struct gdbarch *gdbarch,
   if (val != 0)
     return val;                        /* return error */
 
+  memcpy (bp_tgt->shadow_contents, contents_cache, 4);
   bp_tgt->placed_size = bp_tgt->shadow_len = 4;
 
   /* Determine appropriate breakpoint contents and size for this address.  */
@@ -163,7 +163,7 @@ m32r_memory_remove_breakpoint (struct gdbarch *gdbarch,
     }
 
   /* Write contents.  */
-  val = target_write_memory (addr & 0xfffffffc, buf, 4);
+  val = target_write_raw_memory (addr & 0xfffffffc, buf, 4);
   return val;
 }
 
@@ -536,7 +536,7 @@ m32r_frame_unwind_cache (struct frame_info *this_frame,
   CORE_ADDR pc, scan_limit;
   ULONGEST prev_sp;
   ULONGEST this_base;
-  unsigned long op, op2;
+  unsigned long op;
   int i;
   struct m32r_unwind_cache *info;
 
@@ -667,12 +667,6 @@ m32r_read_pc (struct regcache *regcache)
   return pc;
 }
 
-static void
-m32r_write_pc (struct regcache *regcache, CORE_ADDR val)
-{
-  regcache_cooked_write_unsigned (regcache, M32R_PC_REGNUM, val);
-}
-
 static CORE_ADDR
 m32r_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
 {
@@ -696,7 +690,6 @@ m32r_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
   gdb_byte *val;
   gdb_byte valbuf[MAX_REGISTER_SIZE];
   int len;
-  int odd_sized_struct;
 
   /* First force sp to a 4-byte alignment.  */
   sp = sp & ~3;
@@ -808,7 +801,7 @@ m32r_extract_return_value (struct type *type, struct regcache *regcache,
 }
 
 static enum return_value_convention
-m32r_return_value (struct gdbarch *gdbarch, struct type *func_type,
+m32r_return_value (struct gdbarch *gdbarch, struct value *function,
                   struct type *valtype, struct regcache *regcache,
                   gdb_byte *readbuf, const gdb_byte *writebuf)
 {
@@ -876,6 +869,7 @@ m32r_frame_prev_register (struct frame_info *this_frame,
 
 static const struct frame_unwind m32r_frame_unwind = {
   NORMAL_FRAME,
+  default_frame_unwind_stop_reason,
   m32r_frame_this_id,
   m32r_frame_prev_register,
   NULL,
@@ -923,14 +917,14 @@ m32r_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
     return arches->gdbarch;
 
   /* Allocate space for the new architecture.  */
-  tdep = XMALLOC (struct gdbarch_tdep);
+  tdep = XNEW (struct gdbarch_tdep);
   gdbarch = gdbarch_alloc (&info, tdep);
 
   set_gdbarch_read_pc (gdbarch, m32r_read_pc);
-  set_gdbarch_write_pc (gdbarch, m32r_write_pc);
   set_gdbarch_unwind_sp (gdbarch, m32r_unwind_sp);
 
-
+  set_gdbarch_num_regs (gdbarch, M32R_NUM_REGS);
+  set_gdbarch_pc_regnum (gdbarch, M32R_PC_REGNUM);
   set_gdbarch_sp_regnum (gdbarch, M32R_SP_REGNUM);
   set_gdbarch_register_name (gdbarch, m32r_register_name);
   set_gdbarch_register_type (gdbarch, m32r_register_type);