* tilegx-tdep.c (tilegx_analyze_prologue): add check for

        for return address, "lr" register, saved on stack.
        * tilegx-tdep.c (tilegx_frame_cache): update "PC" reg
        after we invoke tilegx_analyze_prologue.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 47ae022..881379c 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,8 +1,15 @@
 2013-02-19  Jiong Wang  <jiwang@tilera.com>
 
+       * tilegx-tdep.c (tilegx_analyze_prologue): add check for
+        for return address, "lr" register, saved on stack.
+       * tilegx-tdep.c (tilegx_frame_cache): update "PC" reg
+       after we invoke tilegx_analyze_prologue.
+
+2013-02-19  Jiong Wang  <jiwang@tilera.com>
+
        * tilegx-tdep.c (itilegx_gdbarch_init): char type should be signed.
 
-2013-02-13  Jiong Wang  <jiwang@tilera.com>
+2013-02-19  Jiong Wang  <jiwang@tilera.com>
 
        * tilegx-tdep.c (tilegx_skip_prologue): Use skip_prologue_using_sal. 
 

diff --git a/gdb/tilegx-tdep.c b/gdb/tilegx-tdep.c
index bc0bbe6..2c4e349 100644 (file)
--- a/gdb/tilegx-tdep.c
+++ b/gdb/tilegx-tdep.c
@@ -393,7 +393,7 @@ tilegx_analyze_prologue (struct gdbarch* gdbarch,
   struct tilegx_reverse_regs
     new_reverse_frame[TILEGX_MAX_INSTRUCTIONS_PER_BUNDLE];
   int dest_regs[TILEGX_MAX_INSTRUCTIONS_PER_BUNDLE];
-  int reverse_frame_valid, prolog_done, branch_seen;
+  int reverse_frame_valid, prolog_done, branch_seen, lr_saved_on_stack_p;
   LONGEST prev_sp_value;
   int i, j;
 
@@ -409,6 +409,7 @@ tilegx_analyze_prologue (struct gdbarch* gdbarch,
   prolog_done = 0;
   branch_seen = 0;
   prev_sp_value = 0;
+  lr_saved_on_stack_p = 0;
 
   /* To cut down on round-trip overhead, we fetch multiple bundles
      at once.  These variables describe the range of memory we have
@@ -472,7 +473,11 @@ tilegx_analyze_prologue (struct gdbarch* gdbarch,
                     See trad-frame.h.  */
                  cache->saved_regs[saved_register].realreg = saved_register;
                  cache->saved_regs[saved_register].addr = saved_address;
-               }
+               } 
+             else if (cache
+                      && (operands[0] == TILEGX_SP_REGNUM) 
+                      && (operands[1] == TILEGX_LR_REGNUM))
+               lr_saved_on_stack_p = 1;
              break;
            case TILEGX_OPC_ADDI:
            case TILEGX_OPC_ADDLI:
@@ -725,6 +730,13 @@ tilegx_analyze_prologue (struct gdbarch* gdbarch,
        }
     }
 
+  if (lr_saved_on_stack_p)
+    {
+      cache->saved_regs[TILEGX_LR_REGNUM].realreg = TILEGX_LR_REGNUM;
+      cache->saved_regs[TILEGX_LR_REGNUM].addr =
+       cache->saved_regs[TILEGX_SP_REGNUM].addr;
+    }
+
   return prolog_end;
 }
 
@@ -840,11 +852,12 @@ tilegx_frame_cache (struct frame_info *this_frame, void **this_cache)
   cache->base = get_frame_register_unsigned (this_frame, TILEGX_SP_REGNUM);
   trad_frame_set_value (cache->saved_regs, TILEGX_SP_REGNUM, cache->base);
 
-  cache->saved_regs[TILEGX_PC_REGNUM] = cache->saved_regs[TILEGX_LR_REGNUM];
   if (cache->start_pc)
     tilegx_analyze_prologue (gdbarch, cache->start_pc, current_pc,
                             cache, this_frame);
 
+  cache->saved_regs[TILEGX_PC_REGNUM] = cache->saved_regs[TILEGX_LR_REGNUM];
+
   return cache;
 }