From: Fred Fish <fnf@specifix.com>
Date: Sat, 21 Jun 1997 03:50:11 +0000 (+0000)
Subject: 	* sh-tdep.c (sh_skip_prologue): Also recognize fmov insns.
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=4a9d4495ebbbfd98014692be93ff0fe98a44657d;p=deliverable%2Fbinutils-gdb.git

	* sh-tdep.c (sh_skip_prologue): Also recognize fmov insns.
	(sh_frame_find_saved_regs): Recognize fmov insns and adjust
	stack push count accordingly.
	* sh-tdep.c (IS_FMOV, FPSCR_SZ): New defines
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 4aeeeddeb9..1c7b2ff03a 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,12 @@
+start-sanitize-sh4
+Fri Jun 20 17:58:34 1997  Fred Fish  <fnf@cygnus.com>
+
+	* sh-tdep.c (sh_skip_prologue): Also recognize fmov insns.
+	(sh_frame_find_saved_regs): Recognize fmov insns and adjust
+	stack push count accordingly.
+	* sh-tdep.c (IS_FMOV, FPSCR_SZ): New defines
+
+end-sanitize-sh4
 Thu Jun 19 08:18:48 1997  Mark Alexander  <marka@cygnus.com>
 
 	* utils.c (floatformat_from_doublest): Improve test for infinity.
diff --git a/gdb/sh-tdep.c b/gdb/sh-tdep.c
index 7c7002aa79..c1db88c026 100644
--- a/gdb/sh-tdep.c
+++ b/gdb/sh-tdep.c
@@ -113,6 +113,10 @@ struct {
 #define IS_MOV_R3(x) 		(((x) & 0xff00) == 0x1a00)
 #define IS_SHLL_R3(x)		((x) == 0x4300)
 #define IS_ADD_R3SP(x)		((x) == 0x3f3c)
+/* start-sanitize-sh4 */
+#define IS_FMOV(x)		(((x) & 0xf00f) == 0xf00b)
+#define FPSCR_SZ		(1 << 20)
+/* end-sanitize-sh4 */
 
 /* Skip any prologue before the guts of a function */
 
@@ -124,6 +128,9 @@ sh_skip_prologue (start_pc)
 
   w = read_memory_integer (start_pc, 2);
   while (IS_STS (w)
+	 /* start-sanitize-sh4 */
+	 || IS_FMOV (w)
+	 /* end-sanitize-sh4 */
 	 || IS_PUSH (w)
 	 || IS_MOV_SP_FP (w)
 	 || IS_MOV_R3 (w)
@@ -240,9 +247,11 @@ sh_frame_find_saved_regs (fi, fsr)
 
   depth = 0;
 
-  /* Loop around examining the prologue insns, but give up
-     after 15 of them, since we're getting silly then */
-  while (pc < opc + 15 * 2)
+  /* Loop around examining the prologue insns until we find something
+     that does not appear to be part of the prologue.  But give up
+     after 20 of them, since we're getting silly then. */
+
+  while (pc < opc + 20 * 2)
     {
       /* See where the registers will be saved to */
       if (IS_PUSH (insn))
@@ -286,6 +295,21 @@ sh_frame_find_saved_regs (fi, fsr)
 	  depth -= ((insn & 0xff) ^ 0x80) - 0x80;
 	  insn = read_memory_integer (pc, 2);
 	}
+      /* start-sanitize-sh4 */
+      else if (IS_FMOV (insn))
+	{
+	  pc += 2;
+	  insn = read_memory_integer (pc, 2);
+	  if (read_register (FPSCR_REGNUM) & FPSCR_SZ)
+	    {
+	      depth += 8;
+	    }
+	  else
+	    {
+	      depth += 4;
+	    }
+	}
+      /* end-sanitize-sh4 */
       else
 	break;
     }