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[PATCH]: Fix 68HC12 prologue analysis
- From: Stephane Carrez <stcarrez at nerim dot fr>
- To: gdb-patches at sources dot redhat dot com
- Date: Tue, 13 Aug 2002 15:04:07 +0200
- Subject: [PATCH]: Fix 68HC12 prologue analysis
Hi!
I've committed this patch to fix analysis of 68HC12 function prologue.
Stephane
2002-08-13 Stephane Carrez <stcarrez@nerim.fr>
* m68hc11-tdep.c (M6812_OP_PSHX, M6812_OP_PSHY): New defines.
(m6812_prolog): They can appear in 68HC12 function prologue.
(m68hc11_frame_chain): Cleanup.
Index: m68hc11-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/m68hc11-tdep.c,v
retrieving revision 1.23
diff -u -p -r1.23 m68hc11-tdep.c
--- m68hc11-tdep.c 3 Aug 2002 15:56:23 -0000 1.23
+++ m68hc11-tdep.c 13 Aug 2002 11:02:15 -0000
@@ -1,6 +1,6 @@
/* Target-dependent code for Motorola 68HC11 & 68HC12
Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
- Contributed by Stephane Carrez, stcarrez@worldnet.fr
+ Contributed by Stephane Carrez, stcarrez@nerim.fr
This file is part of GDB.
@@ -364,6 +364,8 @@ m68hc11_pop_frame (void)
#define M6812_PB_PSHW (0xae)
#define M6812_OP_STS (0x7f)
#define M6812_OP_LEAS (0x1b)
+#define M6812_OP_PSHX (0x34)
+#define M6812_OP_PSHY (0x35)
/* Operand extraction. */
#define OP_DIRECT (0x100) /* 8-byte direct addressing. */
@@ -423,6 +425,8 @@ static struct insn_sequence m6812_prolog
OP_IMM_HIGH, OP_IMM_LOW } },
{ P_SET_FRAME, 3, { M6812_OP_STS, OP_IMM_HIGH, OP_IMM_LOW } },
{ P_LOCAL_N, 2, { M6812_OP_LEAS, OP_PBYTE } },
+ { P_LOCAL_2, 1, { M6812_OP_PSHX } },
+ { P_LOCAL_2, 1, { M6812_OP_PSHY } },
{ P_LAST, 0 }
};
@@ -686,11 +690,6 @@ m68hc11_frame_chain (struct frame_info *
addr = frame->frame + frame->extra_info->size + STACK_CORRECTION - 2;
addr = read_memory_unsigned_integer (addr, 2) & 0x0FFFF;
- if (addr == 0)
- {
- return (CORE_ADDR) 0;
- }
-
return addr;
}