From: kettenis <kettenis>
Date: Sat, 15 Jun 2002 20:41:51 +0000 (+0000)
Subject: * config/i386/tm-i386.h (FUNCTION_START_OFFSET, INNER_THAN,
X-Git-Tag: pre-no-this~1934
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=0eb9afa5f4717fc61ee792cf56a08d360958c26a;p=pf3gnuchains%2Fpf3gnuchains4x.git

* config/i386/tm-i386.h (FUNCTION_START_OFFSET, INNER_THAN,
BREAKPOINT, DECR_PC_AFTER_BREAK): Removed.
* i386-tdep.c (i386_skip_prologue): Adjust function signature to
fit into multi-arch framework.
(i386_breakpoint_from_pc): New function.
(i386_gdbarch_init): Adjust for removal of the macros mentioned
above.
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 9cde79ccf0..6d371f5f13 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,13 @@
 2002-06-15  Mark Kettenis  <kettenis@gnu.org>
 
+	* config/i386/tm-i386.h (FUNCTION_START_OFFSET, INNER_THAN,
+	BREAKPOINT, DECR_PC_AFTER_BREAK): Removed.
+	* i386-tdep.c (i386_skip_prologue): Adjust function signature to
+	fit into multi-arch framework.
+	(i386_breakpoint_from_pc): New function.
+	(i386_gdbarch_init): Adjust for removal of the macros mentioned
+	above.
+
 	* config/i386/tm-i386.h (FRAMELESS_FUNCTION_INVOCATION,
 	FRAME_ARGS_ADDRESS, FRAME_LOCALS_ADDRESS, FRAME_NUM_ARGS,
 	FRAME_ARGS_SKIP, FRAME_INIT_SAVED_REGS): Remove defines.
diff --git a/gdb/config/i386/tm-i386.h b/gdb/config/i386/tm-i386.h
index 6ac6bc7c19..572642abf0 100644
--- a/gdb/config/i386/tm-i386.h
+++ b/gdb/config/i386/tm-i386.h
@@ -32,32 +32,6 @@ struct frame_saved_regs;
 struct value;
 struct type;
 
-/* Offset from address of function to start of its code.
-   Zero on most machines.  */
-
-#define FUNCTION_START_OFFSET 0
-
-/* Advance PC across any function entry prologue instructions to reach some
-   "real" code.  */
-
-#define SKIP_PROLOGUE(frompc)   (i386_skip_prologue (frompc))
-
-extern int i386_skip_prologue (int);
-
-/* Stack grows downward.  */
-
-#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
-
-/* Sequence of bytes for breakpoint instruction.  */
-
-#define BREAKPOINT {0xcc}
-
-/* Amount PC must be decremented by after a breakpoint.  This is often the
-   number of bytes in BREAKPOINT but not always. */
-
-#define DECR_PC_AFTER_BREAK 1
-
-
 /* Return the GDB type object for the "standard" data type of data in
    register REGNUM.  */
 
diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c
index 250d1c2644..97390158cc 100644
--- a/gdb/i386-tdep.c
+++ b/gdb/i386-tdep.c
@@ -666,8 +666,8 @@ i386_frame_init_saved_regs (struct frame_info *fip)
 
 /* Return PC of first real instruction.  */
 
-int
-i386_skip_prologue (int pc)
+CORE_ADDR
+i386_skip_prologue (CORE_ADDR pc)
 {
   unsigned char op;
   int i;
@@ -749,6 +749,24 @@ i386_skip_prologue (int pc)
   return (codestream_tell ());
 }
 
+/* Use the program counter to determine the contents and size of a
+   breakpoint instruction.  Return a pointer to a string of bytes that
+   encode a breakpoint instruction, store the length of the string in
+   *LEN and optionally adjust *PC to point to the correct memory
+   location for inserting the breakpoint.
+
+   On the i386 we have a single breakpoint that fits in a single byte
+   and can be inserted anywhere.  */
+   
+static const unsigned char *
+i386_breakpoint_from_pc (CORE_ADDR *pc, int *len)
+{
+  static unsigned char break_insn[] = { 0xcc };	/* int 3 */
+  
+  *len = sizeof (break_insn);
+  return break_insn;
+}
+
 void
 i386_push_dummy_frame (void)
 {
@@ -1402,6 +1420,14 @@ i386_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
   set_gdbarch_use_struct_convention (gdbarch, i386_use_struct_convention);
 
   set_gdbarch_frame_init_saved_regs (gdbarch, i386_frame_init_saved_regs);
+  set_gdbarch_skip_prologue (gdbarch, i386_skip_prologue);
+
+  /* Stack grows downward.  */
+  set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
+
+  set_gdbarch_breakpoint_from_pc (gdbarch, i386_breakpoint_from_pc);
+  set_gdbarch_decr_pc_after_break (gdbarch, 1);
+  set_gdbarch_function_start_offset (gdbarch, 0);
 
   /* The following redefines make backtracing through sigtramp work.
      They manufacture a fake sigtramp frame and obtain the saved pc in