From: Michael Meissner <gnu@the-meissners.org>
Date: Fri, 27 Dec 1996 20:59:46 +0000 (+0000)
Subject: Add large frame support
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=0b019fa141e52458e9e463bc088cb11191c37b47;p=deliverable%2Fbinutils-gdb.git

Add large frame support
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index d5ef748967..71db97e5d7 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -3,10 +3,10 @@ Fri Dec 27 14:53:40 1996  Michael Meissner  <meissner@tiktok.cygnus.com>
 	* v850-tdep.c (struct pifsr): Add cur_frameoffset field.
 	(v850_scan_prologue): Add debug code #ifdef'ed DEBUG.  Support new
 	compiler prologues using register save functions and short store
-	instructions.
+	instructions.  Add support for functions with large stack frames.
 
-	* config/v850/tm-vm850.h ({R1,EP}_REGNUMS): New register number
-	defintiions for r1, ep.
+	* config/v850/tm-vm850.h ({R0,R1,R12,EP}_REGNUMS): New register
+	number defintiions for r0, r1, r12, ep.
 	(SAVE{1,2,3}_{START,END}_REGNUM): Register number definitions for
 	the 3 sets of saved registers.
 
diff --git a/gdb/config/v850/tm-v850.h b/gdb/config/v850/tm-v850.h
index b30f39c2f7..bc37144a3c 100644
--- a/gdb/config/v850/tm-v850.h
+++ b/gdb/config/v850/tm-v850.h
@@ -39,6 +39,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 #define REGISTER_SIZE 4
 #define MAX_REGISTER_RAW_SIZE 4
 
+#define R0_REGNUM 0
 #define R1_REGNUM 1
 #define SAVE1_START_REGNUM 2
 #define SAVE1_END_REGNUM 2
@@ -47,6 +48,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 #define ARGLAST_REGNUM 9
 #define V0_REGNUM 10
 #define V1_REGNUM 11
+#define R12_REGNUM 12
 #define SAVE2_START_REGNUM 20
 #define SAVE2_END_REGNUM 29
 #define FP_REGNUM 29
diff --git a/gdb/v850-tdep.c b/gdb/v850-tdep.c
index b79221ab72..1bde62c101 100644
--- a/gdb/v850-tdep.c
+++ b/gdb/v850-tdep.c
@@ -71,6 +71,7 @@ v850_scan_prologue (pc, pi)
   CORE_ADDR save_pc, save_end;
   int regsave_func_p;
   int current_sp_size;
+  int r12_tmp;
 
   /* First, figure out the bounds of the prologue so that we can limit the
      search to something reasonable.  */
@@ -115,6 +116,7 @@ v850_scan_prologue (pc, pi)
   regsave_func_p = 0;
   save_pc = 0;
   save_end = 0;
+  r12_tmp = 0;
 
 #ifdef DEBUG
   printf_filtered ("Current_pc = 0x%.8lx, prologue_end = 0x%.8lx\n",
@@ -184,13 +186,19 @@ v850_scan_prologue (pc, pi)
 	  pi->framereg = FP_REGNUM;
 	}
 
+      else if (insn == ((R12_REGNUM << 11) | 0x0640 | R0_REGNUM))	/* movhi hi(const),r0,r12 */
+	r12_tmp = read_memory_integer (current_pc + 2, 2) << 16;
+      else if (insn == ((R12_REGNUM << 11) | 0x0620 | R12_REGNUM))	/* movea lo(const),r12,r12 */
+	r12_tmp += read_memory_integer (current_pc + 2, 2);
+      else if (insn == ((SP_REGNUM << 11) | 0x01c0 | R12_REGNUM) && r12_tmp) /* add r12,sp */
+	pi->frameoffset = r12_tmp;
       else if (insn == ((EP_REGNUM << 11) | 0x0000 | SP_REGNUM))	/* mov sp,ep */
 	ep_used = 1;
       else if (insn == ((EP_REGNUM << 11) | 0x0000 | R1_REGNUM))	/* mov r1,ep */
 	ep_used = 0;
-      else if (((insn & 0x07ff) == (0x0760 | SP_REGNUM)		 /* st.w <reg>,<offset>[sp] */
+      else if (((insn & 0x07ff) == (0x0760 | SP_REGNUM)			/* st.w <reg>,<offset>[sp] */
 		|| (fp_used
-		    && (insn & 0x07ff) == (0x0760 | FP_REGNUM))) /* st.w <reg>,<offset>[fp] */
+		    && (insn & 0x07ff) == (0x0760 | FP_REGNUM)))	/* st.w <reg>,<offset>[fp] */
 	       && pifsr
 	       && (((reg = (insn >> 11) & 0x1f) >= SAVE1_START_REGNUM && reg <= SAVE1_END_REGNUM)
 		   || (reg >= SAVE2_START_REGNUM && reg <= SAVE2_END_REGNUM)