* rs6000-xdep.c (frame_initial_stack_address): Move

	code to set frame->cache_fsr into new separate function
	frame_get_cacahe_fsr.  This allows fixing a fatal error.
	* xcoffexec.c:  Turn previously suppressed error
	message back on, after cleaning up BFD.

1 files changed, 60 insertions, 38 deletions

diff --git a/gdb/rs6000-xdep.c b/gdb/rs6000-xdep.c
index afb24c6..2dd170a 100644
--- a/gdb/rs6000-xdep.c
+++ b/gdb/rs6000-xdep.c
@@ -61,6 +61,7 @@ static int special_regs[] = {
 extern int one_stepped;
 
 extern char register_valid[];
+extern struct obstack frame_cache_obstack;
 
 
 void
@@ -242,20 +243,66 @@ struct frame_info *fi;
 }
 
 
+/* If saved registers of frame FI are not known yet, read and cache them.
+   &FDATAP contains aix_framedata; TDATAP can be NULL,
+   in which case the framedata are read.
+ */
+
+static void
+frame_get_cache_fsr (fi, fdatap)
+     struct frame_info *fi;
+     struct aix_framedata *fdatap;
+{
+  int ii;
+  CORE_ADDR frame_addr; 
+  struct aix_framedata work_fdata;
+  if (fi->cache_fsr)
+    return;
+  
+  if (fdatap = NULL) {
+    fdatap = &work_fdata;
+    function_frame_info (get_pc_function_start (fi->pc), fdatap);
+  }
+
+  fi->cache_fsr = (struct frame_saved_regs *)
+      obstack_alloc (&frame_cache_obstack, sizeof (struct frame_saved_regs));
+  bzero (fi->cache_fsr, sizeof (struct frame_saved_regs));
+
+  if (fi->prev && fi->prev->frame)
+    frame_addr = fi->prev->frame;
+  else
+    frame_addr = read_memory_integer (fi->frame, 4);
+  
+  /* if != -1, fdatap->saved_fpr is the smallest number of saved_fpr.
+     All fpr's from saved_fpr to fp31 are saved right underneath caller
+     stack pointer, starting from fp31 first. */
+
+  if (fdatap->saved_fpr >= 0) {
+    for (ii=31; ii >= fdatap->saved_fpr; --ii)
+      fi->cache_fsr->regs [FP0_REGNUM + ii] = frame_addr - ((32 - ii) * 8);
+    frame_addr -= (32 - fdatap->saved_fpr) * 8;
+  }
+
+  /* if != -1, fdatap->saved_gpr is the smallest number of saved_gpr.
+     All gpr's from saved_gpr to gpr31 are saved right under saved fprs,
+     starting from r31 first. */
+  
+  if (fdatap->saved_gpr >= 0)
+    for (ii=31; ii >= fdatap->saved_gpr; --ii)
+      fi->cache_fsr->regs [ii] = frame_addr - ((32 - ii) * 4);
+}
+
 /* Return the address of a frame. This is the inital %sp value when the frame
    was first allocated. For functions calling alloca(), it might be saved in
    an alloca register. */
 
 CORE_ADDR
 frame_initial_stack_address (fi)
-struct frame_info *fi;
+     struct frame_info *fi;
 {
-  CORE_ADDR frame_addr, tmpaddr;
+  CORE_ADDR tmpaddr;
   struct aix_framedata fdata;
   struct frame_info *callee_fi;
-  int ii;
-
-  extern struct obstack frame_cache_obstack;
 
   /* if the initial stack pointer (frame address) of this frame is known,
      just return it. */
@@ -265,39 +312,12 @@ struct frame_info *fi;
 
   /* find out if this function is using an alloca register.. */
 
-  tmpaddr = get_pc_function_start (fi->pc);
-  function_frame_info (tmpaddr, &fdata);
+  function_frame_info (get_pc_function_start (fi->pc), &fdata);
 
   /* if saved registers of this frame are not known yet, read and cache them. */
 
-  if (!fi->cache_fsr) {
-    fi->cache_fsr = (struct frame_saved_regs *)
-	obstack_alloc (&frame_cache_obstack, sizeof (struct frame_saved_regs));
-    bzero (fi->cache_fsr, sizeof (struct frame_saved_regs));
-
-    if (fi->prev && fi->prev->frame)
-      frame_addr = fi->prev->frame;
-    else
-      frame_addr = read_memory_integer (fi->frame, 4);
-
-    /* if != -1, fdata.saved_fpr is the smallest number of saved_fpr. All fpr's
-       from saved_fpr to fp31 are saved right underneath caller stack pointer,
-       starting from fp31 first. */
-
-    if (fdata.saved_fpr >= 0) {
-      for (ii=31; ii >= fdata.saved_fpr; --ii)
-        fi->cache_fsr->regs [FP0_REGNUM + ii] = frame_addr - ((32 - ii) * 8);
-      frame_addr -= (32 - fdata.saved_fpr) * 8;
-    }
-
-    /* if != -1, fdata.saved_gpr is the smallest number of saved_gpr. All gpr's
-       from saved_gpr to gpr31 are saved right under saved fprs, starting
-       from r31 first. */
-
-    if (fdata.saved_gpr >= 0)
-      for (ii=31; ii >= fdata.saved_gpr; --ii)
-        fi->cache_fsr->regs [ii] = frame_addr - ((32 - ii) * 4);
-  }
+  if (!fi->cache_fsr)
+    frame_get_cache_fsr (fi, &fdata);
 
   /* If no alloca register used, then fi->frame is the value of the %sp for
      this frame, and it is good enough. */
@@ -313,13 +333,15 @@ struct frame_info *fi;
   if (!fi->next)
     return fi->initial_sp = read_register (fdata.alloca_reg);     
 
-  /* Otherwise, this is a caller frame. Callee has already saved (???) its
-     registers. Find the address in which caller's alloca register is saved. */
+  /* Otherwise, this is a caller frame. Callee has usually already saved
+     registers, but there are are exceptions (such as when the callee
+     has no parameters). Find the address in which caller's alloca
+     register is saved. */
 
   for (callee_fi = fi->next; callee_fi; callee_fi = callee_fi->next) {
 
     if (!callee_fi->cache_fsr)
-      fatal ("Callee has not saved caller's registers.");
+      frame_get_cache_fsr (fi, NULL);
 
     /* this is the address in which alloca register is saved. */