Recognize -mep mode when used to store the stack frame

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 252d145..debf0cb 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,10 @@
+start-sanitize-v850
+Thu Dec 19 19:42:44 1996  Michael Meissner  <meissner@tiktok.cygnus.com>
+
+       * v850-tdep.c (v850_scan_prologue): Deal with -mep shorting
+       register saves by using the ep register.
+
+end-sanitize-v850
 start-sanitize-m32r
 Thu Dec 19 15:57:16 1996  Doug Evans  <dje@canuck.cygnus.com>
 

diff --git a/gdb/v850-tdep.c b/gdb/v850-tdep.c
index f7149c4..ac3e13c 100644 (file)
--- a/gdb/v850-tdep.c
+++ b/gdb/v850-tdep.c
@@ -65,6 +65,7 @@ v850_scan_prologue (pc, pi)
   CORE_ADDR func_addr, prologue_end, current_pc;
   struct pifsr *pifsr;
   int fp_used;
+  int ep_used;
 
   /* First, figure out the bounds of the prologue so that we can limit the
      search to something reasonable.  */
@@ -104,6 +105,7 @@ v850_scan_prologue (pc, pi)
   pi->frameoffset = 0;
   pi->framereg = SP_REGNUM;
   fp_used = 0;
+  ep_used = 0;
   pifsr = pi->pifsrs;
 
   for (current_pc = func_addr; current_pc < prologue_end; current_pc += 2)
@@ -125,18 +127,30 @@ v850_scan_prologue (pc, pi)
          fp_used = 1;
          pi->framereg = FP_REGNUM;
        }
-      else if ((insn & 0x07ff) == (0x0760 | SP_REGNUM) /* st.w <reg>,<offset>[sp] */
-              || (fp_used
-                  && (insn & 0x07ff) == (0x0760 | FP_REGNUM))) /* st.w <reg>,<offset>[fp] */
-       if (pifsr)
-         {
-           pifsr->framereg = insn & 0x1f;
-           pifsr->reg = (insn >> 11) & 0x1f; /* Extract <reg> */
-
-           pifsr->offset = read_memory_integer (current_pc + 2, 2) & ~1;
+      else if (insn == 0xf003) /* mov sp,ep */
+       ep_used = 1;
+      else if (insn == 0xf001) /* mov r1,ep */
+       ep_used = 0;
+      else if (((insn & 0x07ff) == (0x0760 | SP_REGNUM)                 /* st.w <reg>,<offset>[sp] */
+               || (fp_used
+                   && (insn & 0x07ff) == (0x0760 | FP_REGNUM))) /* st.w <reg>,<offset>[fp] */
+              && pifsr)
+       {
+         pifsr->framereg = insn & 0x1f;
+         pifsr->reg = (insn >> 11) & 0x1f; /* Extract <reg> */
+         pifsr->offset = read_memory_integer (current_pc + 2, 2) & ~1;
+         pifsr++;
+       }
 
-           pifsr++;
-         }
+      else if (ep_used                 /* sst.w <reg>,<offset>[ep] */
+              && ((insn & 0x0781) == 0x0501)
+              && pifsr)
+       {
+         pifsr->framereg = 3;
+         pifsr->reg = (insn >> 11) & 0x1f; /* Extract <reg> */
+         pifsr->offset = (insn & 0x007e) << 2;
+         pifsr++;
+       }
 
       if ((insn & 0x0780) >= 0x0600) /* Four byte instruction? */
        current_pc += 2;