2003-05-15 Andrew Cagney <cagney@redhat.com>

	* arch-utils.h (legacy_breakpoint_from_pc): Delete declaration.
	* target.h (memory_breakpoint_from_pc): Delete declaration.
	* mem-break.c (memory_breakpoint_from_pc): Delete function.
	* arch-utils.c (legacy_breakpoint_from_pc): Delete function.
	* monitor.c (monitor_insert_breakpoint): Use
	gdbarch_breakpoint_from_pc instead of memory_breakpoint_from_pc.
	* gdbarch.sh (BREAKPOINT_FROM_PC): Do not provide a default.
	* gdbarch.h, gdbarch.c: Re-generate.
	* sparc-tdep.c (sparc_breakpoint_from_pc): New function.
	(sparc_gdbarch_init): Set breakpoint_from_pc to
	sparc_breakpoint_from_pc.
	* config/sparc/tm-sparc.h (BREAKPOINT): Delete macro.
	(BREAKPOINT_FROM_PC): Define.
	(sparc_breakpoint_from_pc): Declare.
	* hppa-tdep.c (hppa_breakpoint_from_pc): New function.
	* config/pa/tm-hppa.h (hppa_breakpoint_from_pc): Declare.
	(BREAKPOINT_FROM_PC): Define.
	(BREAKPOINT): Delete macro.
	* target.h: Update comment.
	* s390-tdep.c (s390_gdbarch_init): Update comments.
	* remote.c: Update comments.
	* remote-mips.c: Update comments.
	* proc-api.c (write_with_trace): Do not check for a breakpoint.
	* mem-break.c: Update comment.
	* ia64-tdep.c (IA64_BREAKPOINT): Rename BREAKPOINT.
	(ia64_memory_insert_breakpoint): Update.
	* config/sparc/tm-sparc.h: Update comment.
	* config/pa/tm-hppa64.h: Update comment.
	* rs6000-tdep.c (BIG_BREAKPOINT, LITTLE_BREAKPOINT): Delete macro.
	(rs6000_breakpoint_from_pc): Update.
	* mips-tdep.c (BIG_BREAKPOINT, LITTLE_BREAKPOINT): Delete macro.
	(PMON_BIG_BREAKPOINT, PMON_LITTLE_BREAKPOINT): Delete macro.
	(IDT_LITTLE_BREAKPOINT, IDT_LITTLE_BREAKPOINT): Delete macro.
	(MIPS16_LITTLE_BREAKPOINT, MIPS16_BIG_BREAKPOINT): Delete macro.
	(mips_breakpoint_from_pc): Update.
	(mips_dump_tdep): Update.

21 files changed, 113 insertions, 200 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 5802390..1011cc8 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,42 @@
 2003-05-15  Andrew Cagney  <cagney@redhat.com>
 
+	* arch-utils.h (legacy_breakpoint_from_pc): Delete declaration.
+	* target.h (memory_breakpoint_from_pc): Delete declaration.
+	* mem-break.c (memory_breakpoint_from_pc): Delete function.
+	* arch-utils.c (legacy_breakpoint_from_pc): Delete function.
+	* monitor.c (monitor_insert_breakpoint): Use
+	gdbarch_breakpoint_from_pc instead of memory_breakpoint_from_pc.
+	* gdbarch.sh (BREAKPOINT_FROM_PC): Do not provide a default.
+	* gdbarch.h, gdbarch.c: Re-generate.
+	* sparc-tdep.c (sparc_breakpoint_from_pc): New function.
+	(sparc_gdbarch_init): Set breakpoint_from_pc to
+	sparc_breakpoint_from_pc.
+	* config/sparc/tm-sparc.h (BREAKPOINT): Delete macro.
+	(BREAKPOINT_FROM_PC): Define.
+	(sparc_breakpoint_from_pc): Declare.
+	* hppa-tdep.c (hppa_breakpoint_from_pc): New function.
+	* config/pa/tm-hppa.h (hppa_breakpoint_from_pc): Declare.
+	(BREAKPOINT_FROM_PC): Define.
+	(BREAKPOINT): Delete macro.
+	* target.h: Update comment.
+	* s390-tdep.c (s390_gdbarch_init): Update comments.
+	* remote.c: Update comments.
+	* remote-mips.c: Update comments.
+	* proc-api.c (write_with_trace): Do not check for a breakpoint.
+	* mem-break.c: Update comment.
+	* ia64-tdep.c (IA64_BREAKPOINT): Rename BREAKPOINT.
+	(ia64_memory_insert_breakpoint): Update.
+	* config/sparc/tm-sparc.h: Update comment.
+	* config/pa/tm-hppa64.h: Update comment.
+	* rs6000-tdep.c (BIG_BREAKPOINT, LITTLE_BREAKPOINT): Delete macro.
+	(rs6000_breakpoint_from_pc): Update.
+	* mips-tdep.c (BIG_BREAKPOINT, LITTLE_BREAKPOINT): Delete macro.
+	(PMON_BIG_BREAKPOINT, PMON_LITTLE_BREAKPOINT): Delete macro.
+	(IDT_LITTLE_BREAKPOINT, IDT_LITTLE_BREAKPOINT): Delete macro.
+	(MIPS16_LITTLE_BREAKPOINT, MIPS16_BIG_BREAKPOINT): Delete macro.
+	(mips_breakpoint_from_pc): Update.
+	(mips_dump_tdep): Update.
+
 	* symtab.h (DEPRECATED_SYMBOL_MATCHES_NAME): Delete macro.
 	* minsyms.c (lookup_minimal_symbol): Inline
 	DEPRECATED_SYMBOL_MATCHES_NAME.  Replace STREQ with strcmp.
diff --git a/gdb/arch-utils.c b/gdb/arch-utils.c
index 2f555ff..48f7f7e 100644
--- a/gdb/arch-utils.c
+++ b/gdb/arch-utils.c
@@ -48,49 +48,6 @@
 
 #include "floatformat.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.  */
-
-const unsigned char *
-legacy_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;
-}
-
 /* Implementation of extract return value that grubs around in the
    register cache.  */
 void
diff --git a/gdb/arch-utils.h b/gdb/arch-utils.h
index cf515a4..27f219b 100644
--- a/gdb/arch-utils.h
+++ b/gdb/arch-utils.h
@@ -40,11 +40,6 @@ extern CORE_ADDR generic_cannot_extract_struct_value_address (char *dummy);
    being passed */
 extern gdbarch_frame_num_args_ftype frame_num_args_unknown;
 
-/* Implementation of breakpoint from PC using any of the deprecated
-   macros BREAKPOINT, LITTLE_BREAKPOINT, BIG_BREAPOINT.  For legacy
-   targets that don't yet implement their own breakpoint_from_pc(). */
-extern gdbarch_breakpoint_from_pc_ftype legacy_breakpoint_from_pc;
-
 /* Implementation of extract return value that grubs around in the
    register cache.  */
 extern gdbarch_extract_return_value_ftype legacy_extract_return_value;
diff --git a/gdb/config/pa/tm-hppa.h b/gdb/config/pa/tm-hppa.h
index 7daa6f5..988b790 100644
--- a/gdb/config/pa/tm-hppa.h
+++ b/gdb/config/pa/tm-hppa.h
@@ -60,7 +60,8 @@ struct inferior_status;
 
 /* Sequence of bytes for breakpoint instruction.  */
 
-#define BREAKPOINT {0x00, 0x01, 0x00, 0x04}
+const unsigned char *hppa_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr);
+#define BREAKPOINT_FROM_PC(PCPTR,LENPTR) hppa_breakpoint_from_pc ((PCPTR), (LENPTR))
 #define BREAKPOINT32 0x10004
 
 extern int hppa_pc_requires_run_before_use (CORE_ADDR pc);
diff --git a/gdb/config/pa/tm-hppa64.h b/gdb/config/pa/tm-hppa64.h
index 4185f18..0d92311 100644
--- a/gdb/config/pa/tm-hppa64.h
+++ b/gdb/config/pa/tm-hppa64.h
@@ -97,9 +97,8 @@ extern CORE_ADDR hppa_stack_align (CORE_ADDR sp);
 #define STACK_ALIGN(sp) hppa_stack_align (sp)
 #endif
 
-/* Amount PC must be decremented by after a breakpoint.
-   This is often the number of bytes in BREAKPOINT
-   but not always.
+/* Amount PC must be decremented by after a breakpoint.  This is often
+   the number of bytes returned by BREAKPOINT_FROM_PC but not always.
 
    Not on the PA-RISC */
 
diff --git a/gdb/config/sparc/tm-sparc.h b/gdb/config/sparc/tm-sparc.h
index a44b04e..95960b2 100644
--- a/gdb/config/sparc/tm-sparc.h
+++ b/gdb/config/sparc/tm-sparc.h
@@ -164,9 +164,8 @@ extern int sparc_intreg_size (void);
 
 #define FUNCTION_START_OFFSET 0
 
-/* Amount PC must be decremented by after a breakpoint.
-   This is often the number of bytes in BREAKPOINT
-   but not always.  */
+/* Amount PC must be decremented by after a breakpoint.  This is often
+   the number of bytes returned by BREAKPOINT_FROM_PC but not always.  */
 
 #define DECR_PC_AFTER_BREAK 0
 
@@ -361,7 +360,8 @@ extern CORE_ADDR sparc_pc_adjust (CORE_ADDR);
 
 /* Sequence of bytes for breakpoint instruction (ta 1). */
 
-#define BREAKPOINT {0x91, 0xd0, 0x20, 0x01}
+extern const unsigned char *sparc_breakpoint_from_pc (CORE_ADDR *pc, int *len);
+#define BREAKPOINT_FROM_PC(PC,LEN) sparc_breakpoint_from_pc ((PC), (LEN))
 
 /* Register numbers of various important registers.
    Note that some of these values are "real" register numbers,
diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c
index db9e76e..eca8d9c 100644
--- a/gdb/gdbarch.c
+++ b/gdb/gdbarch.c
@@ -540,7 +540,6 @@ gdbarch_alloc (const struct gdbarch_info *info,
   current_gdbarch->store_return_value = legacy_store_return_value;
   current_gdbarch->use_struct_convention = generic_use_struct_convention;
   current_gdbarch->prologue_frameless_p = generic_prologue_frameless_p;
-  current_gdbarch->breakpoint_from_pc = legacy_breakpoint_from_pc;
   current_gdbarch->memory_insert_breakpoint = default_memory_insert_breakpoint;
   current_gdbarch->memory_remove_breakpoint = default_memory_remove_breakpoint;
   current_gdbarch->decr_pc_after_break = -1;
@@ -701,7 +700,9 @@ verify_gdbarch (struct gdbarch *gdbarch)
   if ((GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
       && (gdbarch->inner_than == 0))
     fprintf_unfiltered (log, "\n\tinner_than");
-  /* Skip verify of breakpoint_from_pc, invalid_p == 0 */
+  if ((GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
+      && (gdbarch->breakpoint_from_pc == 0))
+    fprintf_unfiltered (log, "\n\tbreakpoint_from_pc");
   /* Skip verify of memory_insert_breakpoint, invalid_p == 0 */
   /* Skip verify of memory_remove_breakpoint, invalid_p == 0 */
   if ((GDB_MULTI_ARCH > GDB_MULTI_ARCH_PARTIAL)
diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h
index 1a8e386..b76f101 100644
--- a/gdb/gdbarch.h
+++ b/gdb/gdbarch.h
@@ -2163,11 +2163,6 @@ extern void set_gdbarch_inner_than (struct gdbarch *gdbarch, gdbarch_inner_than_
 #endif
 #endif
 
-/* Default (function) for non- multi-arch platforms. */
-#if (!GDB_MULTI_ARCH) && !defined (BREAKPOINT_FROM_PC)
-#define BREAKPOINT_FROM_PC(pcptr, lenptr) (legacy_breakpoint_from_pc (pcptr, lenptr))
-#endif
-
 typedef const unsigned char * (gdbarch_breakpoint_from_pc_ftype) (CORE_ADDR *pcptr, int *lenptr);
 extern const unsigned char * gdbarch_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, int *lenptr);
 extern void set_gdbarch_breakpoint_from_pc (struct gdbarch *gdbarch, gdbarch_breakpoint_from_pc_ftype *breakpoint_from_pc);
diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh
index 16165a9..5fb7085 100755
--- a/gdb/gdbarch.sh
+++ b/gdb/gdbarch.sh
@@ -591,7 +591,7 @@ F:2:DEPRECATED_INIT_EXTRA_FRAME_INFO:void:deprecated_init_extra_frame_info:int f
 f:2:SKIP_PROLOGUE:CORE_ADDR:skip_prologue:CORE_ADDR ip:ip::0:0
 f:2:PROLOGUE_FRAMELESS_P:int:prologue_frameless_p:CORE_ADDR ip:ip::0:generic_prologue_frameless_p::0
 f:2:INNER_THAN:int:inner_than:CORE_ADDR lhs, CORE_ADDR rhs:lhs, rhs::0:0
-f:2:BREAKPOINT_FROM_PC:const unsigned char *:breakpoint_from_pc:CORE_ADDR *pcptr, int *lenptr:pcptr, lenptr:::legacy_breakpoint_from_pc::0
+f::BREAKPOINT_FROM_PC:const unsigned char *:breakpoint_from_pc:CORE_ADDR *pcptr, int *lenptr:pcptr, lenptr:::0:
 f:2:MEMORY_INSERT_BREAKPOINT:int:memory_insert_breakpoint:CORE_ADDR addr, char *contents_cache:addr, contents_cache::0:default_memory_insert_breakpoint::0
 f:2:MEMORY_REMOVE_BREAKPOINT:int:memory_remove_breakpoint:CORE_ADDR addr, char *contents_cache:addr, contents_cache::0:default_memory_remove_breakpoint::0
 v:2:DECR_PC_AFTER_BREAK:CORE_ADDR:decr_pc_after_break::::0:-1
diff --git a/gdb/hppa-tdep.c b/gdb/hppa-tdep.c
index 440f4c5..5cedfe7 100644
--- a/gdb/hppa-tdep.c
+++ b/gdb/hppa-tdep.c
@@ -642,6 +642,14 @@ find_unwind_entry (CORE_ADDR pc)
   return NULL;
 }
 
+const unsigned char *
+hppa_breakpoint_from_pc (CORE_ADDR *pc, int *len)
+{
+  static const char breakpoint[] = {0x00, 0x01, 0x00, 0x04};
+  (*len) = sizeof (breakpoint);
+  return breakpoint;
+}
+
 /* Return the adjustment necessary to make for addresses on the stack
    as presented by hpread.c.
 
diff --git a/gdb/ia64-tdep.c b/gdb/ia64-tdep.c
index 43192d4..74be498 100644
--- a/gdb/ia64-tdep.c
+++ b/gdb/ia64-tdep.c
@@ -543,9 +543,9 @@ fetch_instruction (CORE_ADDR addr, instruction_type *it, long long *instr)
    using the pattern seen below. */
 
 #if 0
-#define BREAKPOINT 0x00002000040LL
+#define IA64_BREAKPOINT 0x00002000040LL
 #endif
-#define BREAKPOINT 0x00003333300LL
+#define IA64_BREAKPOINT 0x00003333300LL
 
 static int
 ia64_memory_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
@@ -573,7 +573,7 @@ ia64_memory_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
 
   instr = slotN_contents (bundle, slotnum);
   memcpy(contents_cache, &instr, sizeof(instr));
-  replace_slotN_contents (bundle, BREAKPOINT, slotnum);
+  replace_slotN_contents (bundle, IA64_BREAKPOINT, slotnum);
   if (val == 0)
     target_write_memory (addr, bundle, BUNDLE_LEN);
 
diff --git a/gdb/mem-break.c b/gdb/mem-break.c
index 9cf638e..96750c8 100644
--- a/gdb/mem-break.c
+++ b/gdb/mem-break.c
@@ -24,7 +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"
@@ -32,50 +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.  */
-
-const 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
diff --git a/gdb/mips-tdep.c b/gdb/mips-tdep.c
index 96c4164..8b5861a 100644
--- a/gdb/mips-tdep.c
+++ b/gdb/mips-tdep.c
@@ -5119,19 +5119,6 @@ gdb_print_insn_mips (bfd_vma memaddr, disassemble_info *info)
     return print_insn_little_mips (memaddr, info);
 }
 
-/* Old-style breakpoint macros.
-   The IDT board uses an unusual breakpoint value, and sometimes gets
-   confused when it sees the usual MIPS breakpoint instruction.  */
-
-#define BIG_BREAKPOINT {0, 0x5, 0, 0xd}
-#define LITTLE_BREAKPOINT {0xd, 0, 0x5, 0}
-#define PMON_BIG_BREAKPOINT {0, 0, 0, 0xd}
-#define PMON_LITTLE_BREAKPOINT {0xd, 0, 0, 0}
-#define IDT_BIG_BREAKPOINT {0, 0, 0x0a, 0xd}
-#define IDT_LITTLE_BREAKPOINT {0xd, 0x0a, 0, 0}
-#define MIPS16_BIG_BREAKPOINT {0xe8, 0xa5}
-#define MIPS16_LITTLE_BREAKPOINT {0xa5, 0xe8}
-
 /* This function implements the BREAKPOINT_FROM_PC macro.  It uses the program
    counter value to determine whether a 16- or 32-bit breakpoint should be
    used.  It returns a pointer to a string of bytes that encode a breakpoint
@@ -5146,17 +5133,19 @@ mips_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr)
     {
       if (pc_is_mips16 (*pcptr))
 	{
-	  static unsigned char mips16_big_breakpoint[] =
-	    MIPS16_BIG_BREAKPOINT;
+	  static unsigned char mips16_big_breakpoint[] = {0xe8, 0xa5};
 	  *pcptr = UNMAKE_MIPS16_ADDR (*pcptr);
 	  *lenptr = sizeof (mips16_big_breakpoint);
 	  return mips16_big_breakpoint;
 	}
       else
 	{
-	  static unsigned char big_breakpoint[] = BIG_BREAKPOINT;
-	  static unsigned char pmon_big_breakpoint[] = PMON_BIG_BREAKPOINT;
-	  static unsigned char idt_big_breakpoint[] = IDT_BIG_BREAKPOINT;
+	  /* The IDT board uses an unusual breakpoint value, and
+	     sometimes gets confused when it sees the usual MIPS
+	     breakpoint instruction.  */
+	  static unsigned char big_breakpoint[] = {0, 0x5, 0, 0xd};
+	  static unsigned char pmon_big_breakpoint[] = {0, 0, 0, 0xd};
+	  static unsigned char idt_big_breakpoint[] = {0, 0, 0x0a, 0xd};
 
 	  *lenptr = sizeof (big_breakpoint);
 
@@ -5174,19 +5163,16 @@ mips_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr)
     {
       if (pc_is_mips16 (*pcptr))
 	{
-	  static unsigned char mips16_little_breakpoint[] =
-	    MIPS16_LITTLE_BREAKPOINT;
+	  static unsigned char mips16_little_breakpoint[] = {0xa5, 0xe8};
 	  *pcptr = UNMAKE_MIPS16_ADDR (*pcptr);
 	  *lenptr = sizeof (mips16_little_breakpoint);
 	  return mips16_little_breakpoint;
 	}
       else
 	{
-	  static unsigned char little_breakpoint[] = LITTLE_BREAKPOINT;
-	  static unsigned char pmon_little_breakpoint[] =
-	    PMON_LITTLE_BREAKPOINT;
-	  static unsigned char idt_little_breakpoint[] =
-	    IDT_LITTLE_BREAKPOINT;
+	  static unsigned char little_breakpoint[] = {0xd, 0, 0x5, 0};
+	  static unsigned char pmon_little_breakpoint[] = {0xd, 0, 0, 0};
+	  static unsigned char idt_little_breakpoint[] = {0xd, 0x0a, 0, 0};
 
 	  *lenptr = sizeof (little_breakpoint);
 
@@ -6138,8 +6124,6 @@ mips_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
 		      "mips_dump_tdep: BADVADDR_REGNUM = %d\n",
 		      BADVADDR_REGNUM);
   fprintf_unfiltered (file,
-		      "mips_dump_tdep: BIG_BREAKPOINT = delete?\n");
-  fprintf_unfiltered (file,
 		      "mips_dump_tdep: CAUSE_REGNUM = %d\n",
 		      CAUSE_REGNUM);
   fprintf_unfiltered (file,
@@ -6170,10 +6154,6 @@ mips_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
 		      "mips_dump_tdep:  HI_REGNUM = %d\n",
 		      HI_REGNUM);
   fprintf_unfiltered (file,
-		      "mips_dump_tdep: IDT_BIG_BREAKPOINT = delete?\n");
-  fprintf_unfiltered (file,
-		      "mips_dump_tdep: IDT_LITTLE_BREAKPOINT = delete?\n");
-  fprintf_unfiltered (file,
 		      "mips_dump_tdep: IGNORE_HELPER_CALL # %s\n",
 		      XSTRING (IGNORE_HELPER_CALL (PC)));
   fprintf_unfiltered (file,
@@ -6188,8 +6168,6 @@ mips_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
 		      "mips_dump_tdep: LAST_EMBED_REGNUM = %d\n",
 		      LAST_EMBED_REGNUM);
   fprintf_unfiltered (file,
-		      "mips_dump_tdep: LITTLE_BREAKPOINT = delete?\n");
-  fprintf_unfiltered (file,
 		      "mips_dump_tdep: LO_REGNUM = %d\n",
 		      LO_REGNUM);
 #ifdef MACHINE_CPROC_FP_OFFSET
@@ -6210,13 +6188,9 @@ mips_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
   fprintf_unfiltered (file,
 		      "mips_dump_tdep: MAKE_MIPS16_ADDR = FIXME!\n");
   fprintf_unfiltered (file,
-		      "mips_dump_tdep: MIPS16_BIG_BREAKPOINT = delete?\n");
-  fprintf_unfiltered (file,
 		      "mips_dump_tdep: MIPS16_INSTLEN = %d\n",
 		      MIPS16_INSTLEN);
   fprintf_unfiltered (file,
-		      "mips_dump_tdep: MIPS16_LITTLE_BREAKPOINT = delete?\n");
-  fprintf_unfiltered (file,
 		      "mips_dump_tdep: MIPS_DEFAULT_ABI = FIXME!\n");
   fprintf_unfiltered (file,
 		      "mips_dump_tdep: MIPS_EFI_SYMBOL_NAME = multi-arch!!\n");
@@ -6240,10 +6214,6 @@ mips_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file)
   fprintf_unfiltered (file,
 		      "mips_dump_tdep: OP_LDGPR = used?\n");
   fprintf_unfiltered (file,
-		      "mips_dump_tdep: PMON_BIG_BREAKPOINT = delete?\n");
-  fprintf_unfiltered (file,
-		      "mips_dump_tdep: PMON_LITTLE_BREAKPOINT = delete?\n");
-  fprintf_unfiltered (file,
 		      "mips_dump_tdep: PRID_REGNUM = %d\n",
 		      PRID_REGNUM);
   fprintf_unfiltered (file,
diff --git a/gdb/monitor.c b/gdb/monitor.c
index ede61bb..eabbbd9 100644
--- a/gdb/monitor.c
+++ b/gdb/monitor.c
@@ -2098,7 +2098,7 @@ monitor_insert_breakpoint (CORE_ADDR addr, char *shadow)
     addr = ADDR_BITS_REMOVE (addr);
 
   /* Determine appropriate breakpoint size for this address.  */
-  bp = memory_breakpoint_from_pc (&addr, &bplen);
+  bp = gdbarch_breakpoint_from_pc (current_gdbarch, &addr, &bplen);
 
   for (i = 0; i < current_monitor->num_breakpoints; i++)
     {
diff --git a/gdb/proc-api.c b/gdb/proc-api.c
index 2d4fe81..208b984 100644
--- a/gdb/proc-api.c
+++ b/gdb/proc-api.c
@@ -574,16 +574,6 @@ write_with_trace (int fd, void *varg, size_t len, char *file, int line)
 	break;
       default:
 	{
-#ifdef BREAKPOINT
-	  static unsigned char break_insn[] = BREAKPOINT;
-
-	  if (len == sizeof (break_insn) &&
-	      memcmp (arg, &break_insn, len) == 0)
-	    fprintf (procfs_file ? procfs_file : stdout, 
-		     "write (<breakpoint at 0x%08lx>) \n", 
-		     (unsigned long) lseek_offset);
-	  else 
-#endif
 	  if (rw_table[i].name)
 	    fprintf (procfs_file ? procfs_file : stdout, 
 		     "write (%s) %s\n", 
diff --git a/gdb/remote-mips.c b/gdb/remote-mips.c
index d1e3705..e290849 100644
--- a/gdb/remote-mips.c
+++ b/gdb/remote-mips.c
@@ -2251,13 +2251,13 @@ mips_mourn_inferior (void)
 /* We can write a breakpoint and read the shadow contents in one
    operation.  */
 
-/* Insert a breakpoint.  On targets that don't have built-in breakpoint
-   support, we read the contents of the target location and stash it,
-   then overwrite it with a breakpoint instruction.  ADDR is the target
-   location in the target machine.  CONTENTS_CACHE is a pointer to 
-   memory allocated for saving the target contents.  It is guaranteed
-   by the caller to be long enough to save sizeof BREAKPOINT bytes (this
-   is accomplished via BREAKPOINT_MAX).  */
+/* Insert a breakpoint.  On targets that don't have built-in
+   breakpoint support, we read the contents of the target location and
+   stash it, then overwrite it with a breakpoint instruction.  ADDR is
+   the target location in the target machine.  CONTENTS_CACHE is a
+   pointer to memory allocated for saving the target contents.  It is
+   guaranteed by the caller to be long enough to save the breakpoint
+   length returned by BREAKPOINT_FROM_PC.  */
 
 static int
 mips_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
diff --git a/gdb/remote.c b/gdb/remote.c
index 20becee..b892dda 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -4624,11 +4624,12 @@ extended_remote_async_create_inferior (char *exec_file, char *args, char **env)
 }
 
 
-/* On some machines, e.g. 68k, we may use a different breakpoint instruction
-   than other targets; in those use REMOTE_BREAKPOINT instead of just
-   BREAKPOINT.  Also, bi-endian targets may define LITTLE_REMOTE_BREAKPOINT
-   and BIG_REMOTE_BREAKPOINT.  If none of these are defined, we just call
-   the standard routines that are in mem-break.c.  */
+/* On some machines, e.g. 68k, we may use a different breakpoint
+   instruction than other targets; in those use REMOTE_BREAKPOINT
+   instead of just BREAKPOINT_FROM_PC.  Also, bi-endian targets may
+   define LITTLE_REMOTE_BREAKPOINT and BIG_REMOTE_BREAKPOINT.  If none
+   of these are defined, we just call the standard routines that are
+   in mem-break.c.  */
 
 /* FIXME, these ought to be done in a more dynamic fashion.  For instance,
    the choice of breakpoint instruction affects target program design and
@@ -4652,13 +4653,13 @@ static unsigned char little_break_insn[] = LITTLE_REMOTE_BREAKPOINT;
 
 #endif /* REMOTE_BREAKPOINT */
 
-/* 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
-   location in the target machine.  CONTENTS_CACHE is a pointer to 
-   memory allocated for saving the target contents.  It is guaranteed
-   by the caller to be long enough to save sizeof BREAKPOINT bytes (this
-   is accomplished via BREAKPOINT_MAX).  */
+/* 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 location in the target machine.  CONTENTS_CACHE
+   is a pointer to memory allocated for saving the target contents.
+   It is guaranteed by the caller to be long enough to save the number
+   of bytes returned by BREAKPOINT_FROM_PC.  */
 
 static int
 remote_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c
index 14a7e22..a72c9be 100644
--- a/gdb/rs6000-tdep.c
+++ b/gdb/rs6000-tdep.c
@@ -305,14 +305,11 @@ branch_dest (int opcode, int instr, CORE_ADDR pc, CORE_ADDR safety)
 
 /* Sequence of bytes for breakpoint instruction.  */
 
-#define BIG_BREAKPOINT { 0x7d, 0x82, 0x10, 0x08 }
-#define LITTLE_BREAKPOINT { 0x08, 0x10, 0x82, 0x7d }
-
 const static unsigned char *
 rs6000_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size)
 {
-  static unsigned char big_breakpoint[] = BIG_BREAKPOINT;
-  static unsigned char little_breakpoint[] = LITTLE_BREAKPOINT;
+  static unsigned char big_breakpoint[] = { 0x7d, 0x82, 0x10, 0x08 };
+  static unsigned char little_breakpoint[] = { 0x08, 0x10, 0x82, 0x7d };
   *bp_size = 4;
   if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
     return big_breakpoint;
diff --git a/gdb/s390-tdep.c b/gdb/s390-tdep.c
index f836c1b..ded2508 100644
--- a/gdb/s390-tdep.c
+++ b/gdb/s390-tdep.c
@@ -1825,9 +1825,9 @@ s390_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   set_gdbarch_deprecated_store_struct_return (gdbarch, s390_store_struct_return);
   set_gdbarch_deprecated_extract_return_value (gdbarch, s390_extract_return_value);
   set_gdbarch_deprecated_store_return_value (gdbarch, s390_store_return_value);
-  /* Amount PC must be decremented by after a breakpoint.
-     This is often the number of bytes in BREAKPOINT
-     but not always.  */
+  /* Amount PC must be decremented by after a breakpoint.  This is
+     often the number of bytes returned by BREAKPOINT_FROM_PC but not
+     always.  */
   set_gdbarch_decr_pc_after_break (gdbarch, 2);
   set_gdbarch_deprecated_pop_frame (gdbarch, s390_pop_frame);
   /* Stack grows downward.  */
diff --git a/gdb/sparc-tdep.c b/gdb/sparc-tdep.c
index cf5d9c5..f278bd6 100644
--- a/gdb/sparc-tdep.c
+++ b/gdb/sparc-tdep.c
@@ -151,6 +151,14 @@ int deferred_stores = 0;    /* Accumulated stores we want to do eventually. */
 #endif
 
 
+const unsigned char *
+sparc_breakpoint_from_pc (CORE_ADDR *pc, int *len)
+{
+  static const char breakpoint[] = {0x91, 0xd0, 0x20, 0x01};
+  (*len) = sizeof (breakpoint);
+  return breakpoint;
+}
+
 /* Fetch a single instruction.  Even on bi-endian machines
    such as sparc86x, instructions are always big-endian.  */
 
@@ -3153,7 +3161,7 @@ sparc_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
 
   /* First set settings that are common for all sparc architectures.  */
   set_gdbarch_believe_pcc_promotion (gdbarch, 1);
-  set_gdbarch_breakpoint_from_pc (gdbarch, memory_breakpoint_from_pc);
+  set_gdbarch_breakpoint_from_pc (gdbarch, sparc_breakpoint_from_pc);
   set_gdbarch_decr_pc_after_break (gdbarch, 0);
   set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
   set_gdbarch_deprecated_extract_struct_value_address (gdbarch, sparc_extract_struct_value_address);
diff --git a/gdb/target.h b/gdb/target.h
index e757b67..cd82279 100644
--- a/gdb/target.h
+++ b/gdb/target.h
@@ -552,11 +552,11 @@ extern void print_section_info (struct target_ops *, bfd *);
 #define	target_files_info()	\
      (*current_target.to_files_info) (&current_target)
 
-/* Insert a breakpoint at address ADDR in the target machine.
-   SAVE is a pointer to memory allocated for saving the
-   target contents.  It is guaranteed by the caller to be long enough
-   to save "sizeof BREAKPOINT" bytes.  Result is 0 for success, or
-   an errno value.  */
+/* Insert a breakpoint at address ADDR in the target machine.  SAVE is
+   a pointer to memory allocated for saving the target contents.  It
+   is guaranteed by the caller to be long enough to save the number of
+   breakpoint bytes indicated by BREAKPOINT_FROM_PC.  Result is 0 for
+   success, or an errno value.  */
 
 #define	target_insert_breakpoint(addr, save)	\
      (*current_target.to_insert_breakpoint) (addr, save)
@@ -1126,9 +1126,6 @@ extern int default_memory_remove_breakpoint (CORE_ADDR, char *);
 
 extern int default_memory_insert_breakpoint (CORE_ADDR, char *);
 
-extern const unsigned char *memory_breakpoint_from_pc (CORE_ADDR *pcptr,
-						       int *lenptr);
-
 
 /* From target.c */