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[deliverable/binutils-gdb.git] / gdb / mem-break.c

diff --git a/gdb/mem-break.c b/gdb/mem-break.c
index a67e2a5cbbfb08021126b18aee7206ee708ace83..96750c8b8f6876e4ca8315f184e14bed5f2c7db1 100644 (file)
--- a/gdb/mem-break.c
+++ b/gdb/mem-break.c
@@ -1,6 +1,8 @@
 /* Simulate breakpoints by patching locations in the target system, for GDB.
-   Copyright 1990, 1991, 1992, 1993, 1995, 1997, 1998, 1999, 2000
-   Free Software Foundation, Inc.
+
+   Copyright 1990, 1991, 1992, 1993, 1995, 1997, 1998, 1999, 2000,
+   2002 Free Software Foundation, Inc.
+
    Contributed by Cygnus Support.  Written by John Gilmore.
 
    This file is part of GDB.
@@ -22,7 +24,8 @@
 
 #include "defs.h"
 
-/* This file is only useful if BREAKPOINT is set.  If not, we punt.  */
+/* This file is only useful if BREAKPOINT_FROM_PC is set.  If not, we
+   punt.  */
 
 #include "symtab.h"
 #include "breakpoint.h"
@@ -30,50 +33,6 @@
 #include "target.h"
 
 
-/* Use the program counter to determine the contents and size
-   of a breakpoint instruction.  If no target-dependent macro
-   BREAKPOINT_FROM_PC has been defined to implement this function,
-   assume that the breakpoint doesn't depend on the PC, and
-   use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros.
-   Return a pointer to a string of bytes that encode a breakpoint
-   instruction, stores the length of the string to *lenptr,
-   and optionally adjust the pc to point to the correct memory location
-   for inserting the breakpoint.  */
-
-unsigned char *
-memory_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
-{
-  /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a
-     breakpoint.  On some machines, breakpoints are handled by the
-     target environment and we don't have to worry about them here.  */
-#ifdef BIG_BREAKPOINT
-  if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
-    {
-      static unsigned char big_break_insn[] = BIG_BREAKPOINT;
-      *lenptr = sizeof (big_break_insn);
-      return big_break_insn;
-    }
-#endif
-#ifdef LITTLE_BREAKPOINT
-  if (TARGET_BYTE_ORDER != BFD_ENDIAN_BIG)
-    {
-      static unsigned char little_break_insn[] = LITTLE_BREAKPOINT;
-      *lenptr = sizeof (little_break_insn);
-      return little_break_insn;
-    }
-#endif
-#ifdef BREAKPOINT
-  {
-    static unsigned char break_insn[] = BREAKPOINT;
-    *lenptr = sizeof (break_insn);
-    return break_insn;
-  }
-#endif
-  *lenptr = 0;
-  return NULL;
-}
-
-
 /* Insert a breakpoint on targets that don't have any better breakpoint
    support.  We read the contents of the target location and stash it,
    then overwrite it with a breakpoint instruction.  ADDR is the target
@@ -86,7 +45,7 @@ int
 default_memory_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
 {
   int val;
-  unsigned char *bp;
+  const unsigned char *bp;
   int bplen;
 
   /* Determine appropriate breakpoint contents and size for this address.  */
@@ -108,7 +67,7 @@ default_memory_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
 int
 default_memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
 {
-  unsigned char *bp;
+  const unsigned char *bp;
   int bplen;
 
   /* Determine appropriate breakpoint contents and size for this address.  */