From: Jeff Law <law@redhat.com>
Date: Wed, 6 Apr 1994 00:51:50 +0000 (+0000)
Subject:         * hppa-tdep.c (frameless_function_invocation): If no unwind
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7f43b9b70dc94baa6737737c2342b12eff1d7eaf;p=binutils-gdb.git

    * hppa-tdep.c (frameless_function_invocation): If no unwind
        descriptor was found, then assume this was not a frameless
        function invocation.
        (frame_saved_pc): If the saved PC is in a linker stub, then
        return the return address which the linker stub will return to.
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 22c8622a460..310a1d2ee59 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,11 @@
 Tue Apr  5 15:29:25 1994  Jeffrey A. Law  (law@snake.cs.utah.edu)
 
+	* hppa-tdep.c (frameless_function_invocation): If no unwind
+	descriptor was found, then assume this was not a frameless
+	function invocation.
+	(frame_saved_pc): If the saved PC is in a linker stub, then
+	return the return address which the linker stub will return to.
+
         * xm-hppab.h: Never define USG.
         * xm-hppah.h: Always define USG.
 
diff --git a/gdb/hppa-tdep.c b/gdb/hppa-tdep.c
index 9ec6a90f0c4..7729fdfd420 100644
--- a/gdb/hppa-tdep.c
+++ b/gdb/hppa-tdep.c
@@ -485,7 +485,7 @@ frameless_function_invocation (frame)
   u = find_unwind_entry (frame->pc);
 
   if (u == 0)
-    return frameless_look_for_prologue (frame);
+    return 0;
 
   return (u->Total_frame_size == 0 && u->stub_type == 0);
 }
@@ -506,6 +506,7 @@ frame_saved_pc (frame)
      FRAME frame;
 {
   CORE_ADDR pc = get_frame_pc (frame);
+  struct unwind_table_entry *u;
 
   /* BSD, HPUX & OSF1 all lay out the hardware state in the same manner
      at the base of the frame in an interrupt handler.  Registers within
@@ -522,6 +523,7 @@ frame_saved_pc (frame)
       return rp;
     }
 
+restart:
   if (frameless_function_invocation (frame))
     {
       int ret_regnum;
@@ -542,12 +544,12 @@ frame_saved_pc (frame)
 	  fi = get_frame_info (frame->next);
 	  get_frame_saved_regs (fi, &saved_regs);
 	  if (read_memory_integer (saved_regs.regs[FLAGS_REGNUM] & 0x2, 4))
-	    return read_memory_integer (saved_regs.regs[31], 4);
+	    pc = read_memory_integer (saved_regs.regs[31], 4) & ~0x3;
 	  else
-	    return read_memory_integer (saved_regs.regs[RP_REGNUM], 4);
+	    pc = read_memory_integer (saved_regs.regs[RP_REGNUM], 4) & ~0x3;
 	}
       else
-	return read_register (ret_regnum) & ~0x3;
+	pc = read_register (ret_regnum) & ~0x3;
     }
   else
     {
@@ -567,15 +569,23 @@ frame_saved_pc (frame)
 	  fi = get_frame_info (frame->next);
 	  get_frame_saved_regs (fi, &saved_regs);
 	  if (read_memory_integer (saved_regs.regs[FLAGS_REGNUM] & 0x2, 4))
-	    return read_memory_integer (saved_regs.regs[31], 4);
+	    pc = read_memory_integer (saved_regs.regs[31], 4) & ~0x3;
 	  else
-	    return read_memory_integer (saved_regs.regs[RP_REGNUM], 4);
+	    pc = read_memory_integer (saved_regs.regs[RP_REGNUM], 4) & ~0x3;
 	}
       else if (rp_offset == 0)
-	return read_register (RP_REGNUM) & ~0x3;
+	pc = read_register (RP_REGNUM) & ~0x3;
       else
-	return read_memory_integer (frame->frame + rp_offset, 4) & ~0x3;
+	pc = read_memory_integer (frame->frame + rp_offset, 4) & ~0x3;
     }
+
+  /* If PC is inside a linker stub, then dig out the address the stub
+     will return to.  */
+  u = find_unwind_entry (pc);
+  if (u && u->stub_type != 0)
+    goto restart;
+
+  return pc;
 }
 
 /* We need to correct the PC and the FP for the outermost frame when we are