750-debian_sparc-singlestep.patch

這是一個實時嵌入式作業系統 實作了MCS51 ARM等MCU

Status: submitted for comments

2004-11-13  Daniel Jacobowitz  <[e-mail]>

	* sparc-tdep.c (sparc_software_single_step): Handle stepping to NULL.

Index: gdb-6.3/gdb/sparc-tdep.c
===================================================================
--- gdb-6.3.orig/gdb/sparc-tdep.c	2004-06-06 22:02:55.000000000 -0400
+++ gdb-6.3/gdb/sparc-tdep.c	2004-11-13 17:06:05.000000000 -0500
@@ -1026,10 +1026,10 @@
 
   if (insert_breakpoints_p)
     {
-      CORE_ADDR pc;
+      CORE_ADDR pc, orig_npc;
 
       pc = sparc_address_from_register (tdep->pc_regnum);
-      npc = sparc_address_from_register (tdep->npc_regnum);
+      orig_npc = npc = sparc_address_from_register (tdep->npc_regnum);
 
       /* Analyze the instruction at PC.  */
       nnpc = sparc_analyze_control_transfer (pc, &npc);
@@ -1039,9 +1039,10 @@
 	target_insert_breakpoint (nnpc, nnpc_save);
 
       /* Assert that we have set at least one breakpoint, and that
-         they're not set at the same spot.  */
-      gdb_assert (npc != 0 || nnpc != 0);
-      gdb_assert (nnpc != npc);
+         they're not set at the same spot - unless we're going
+	 from here straight to NULL, i.e. a call or jump to 0.  */
+      gdb_assert (npc != 0 || nnpc != 0 || orig_npc == 0);
+      gdb_assert (nnpc != npc || orig_npc == 0);
     }
   else
     {