import gdb-1999-08-23 snapshot

[deliverable/binutils-gdb.git] / gdb / config / pa / tm-hppao.h

diff --git a/gdb/config/pa/tm-hppao.h b/gdb/config/pa/tm-hppao.h
index fd0d25c721b6b9d94163f3a73c286b53ebb2b910..2e87efa9c45ebbb07727aad072e4a7342c37fb4a 100644 (file)
--- a/gdb/config/pa/tm-hppao.h
+++ b/gdb/config/pa/tm-hppao.h
@@ -2,6 +2,28 @@
    Contributed by the Center for Software Science at the
    University of Utah (pa-gdb-bugs@cs.utah.edu).  */
 
+/* Define offsets to access CPROC stack when it does not have
+ * a kernel thread.
+ */
+#define MACHINE_CPROC_SP_OFFSET 20
+#define MACHINE_CPROC_PC_OFFSET 16
+#define MACHINE_CPROC_FP_OFFSET 12
+
+/*
+ * Software defined PSW masks.
+ */
+#define PSW_SS  0x10000000     /* Kernel managed single step */
+
+/* Thread flavors used in re-setting the T bit.
+ * @@ this is also bad for cross debugging.
+ */
+#define TRACE_FLAVOR           HP800_THREAD_STATE
+#define TRACE_FLAVOR_SIZE      HP800_THREAD_STATE_COUNT
+#define TRACE_SET(x,state) \
+       ((struct hp800_thread_state *)state)->cr22 |= PSW_SS
+#define TRACE_CLEAR(x,state) \
+       ((((struct hp800_thread_state *)state)->cr22 &= ~PSW_SS), 1)
+
 /* For OSF1 (Should be close if not identical to BSD, but I haven't
    tested it yet):
 
@@ -44,8 +66,31 @@
     } \
 }
 
-/* OSF1 needs an extra trap.  I assume for the emulator startup (?!?) */
-#define START_INFERIOR_TRAPS_EXPECTED 3
+/* OSF1 does not need the pc space queue restored.  */
+#define NO_PC_SPACE_QUEUE_RESTORE
+
+/* The mach kernel uses the recovery counter to implement single
+   stepping.  While this greatly simplifies the kernel support
+   necessary for single stepping, it unfortunately does the wrong
+   thing in the presense of a nullified instruction (gives control
+   back two insns after the nullifed insn).  This is an artifact
+   of the HP architecture (recovery counter doesn't tick for
+   nullified insns).
+
+   Do our best to avoid losing in such situations.  */
+#define INSTRUCTION_NULLIFIED \
+(({ \
+    int ipsw = (int)read_register(IPSW_REGNUM); \
+    if (ipsw & PSW_N)  \
+      { \
+        int pcoqt = (int)read_register(PCOQ_TAIL_REGNUM); \
+        write_register(PCOQ_HEAD_REGNUM, pcoqt); \
+        write_register(PCOQ_TAIL_REGNUM, pcoqt + 0x4); \
+        write_register(IPSW_REGNUM, ipsw & ~(PSW_N | PSW_B | PSW_X)); \
+        stop_pc = pcoqt; \
+      } \
+   }), 0)
 
 /* It's mostly just the common stuff.  */
+
 #include "pa/tm-hppa.h"