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From: Marcel Moolenaar <marcel@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
Subject: PERFORCE change 49831 for review
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http://perforce.freebsd.org/chv.cgi?CH=49831

Change 49831 by marcel@marcel_nfs on 2004/03/28 00:50:36

	Add support for machine dependent queries. Use this on ia64
	to handle the Part:dirty:read:: query added to the remote
	protocol to support the TARGET_OBJECT_DIRTY partial xfer.
	In short: can can read the dirty stacked registers.

Affected files ...

.. //depot/projects/gdb/sys/gdb/gdb_main.c#11 edit
.. //depot/projects/gdb/sys/i386/include/gdb_machdep.h#5 edit
.. //depot/projects/gdb/sys/ia64/ia64/gdb_machdep.c#6 edit
.. //depot/projects/gdb/sys/ia64/include/gdb_machdep.h#5 edit

Differences ...

==== //depot/projects/gdb/sys/gdb/gdb_main.c#11 (text+ko) ====

@@ -183,7 +183,7 @@
 					gdb_tx_begin('l');
 					gdb_tx_end();
 				}
-			} else
+			} else if (!gdb_cpu_query())
 				gdb_tx_empty();
 			break;
 		case 's': {	/* single step */

==== //depot/projects/gdb/sys/i386/include/gdb_machdep.h#5 (text+ko) ====

@@ -39,6 +39,12 @@
 	return (sizeof(int));
 }
 
+static __inline int
+gdb_cpu_query(void)
+{
+	return (0);
+}
+
 void *gdb_cpu_getreg(int, size_t *);
 void gdb_cpu_setreg(int, register_t);
 int gdb_cpu_signal(int, int);

==== //depot/projects/gdb/sys/ia64/ia64/gdb_machdep.c#6 (text+ko) ====

@@ -39,6 +39,7 @@
 #include <machine/reg.h>
 
 #include <gdb/gdb.h>
+#include <gdb/gdb_int.h>
 
 void *
 gdb_cpu_getreg(int regnum, size_t *regsz)
@@ -122,3 +123,26 @@
 	case GDB_REG_PC: break;
 	}
 }
+
+int
+gdb_cpu_query(void)
+{
+	if (gdb_rx_equal("Part:dirty:read::")) {
+		uint64_t *kstack;
+		uintmax_t slot;
+		if (gdb_rx_varhex(&slot) < 0) {
+			gdb_tx_err(EINVAL);
+			return (-1);
+		}
+		if (slot >= 0 && slot < (kdb_frame->tf_special.ndirty >> 3)) {
+			kstack = (uint64_t*)(kdb_thread->td_kstack +
+			    (kdb_frame->tf_special.bspstore & 0x1ffUL));
+			gdb_tx_begin('\0');
+			gdb_tx_mem((void*)(kstack + slot), 8);
+			gdb_tx_end();
+		}
+		return (1);
+	}
+
+	return (0);
+}

==== //depot/projects/gdb/sys/ia64/include/gdb_machdep.h#5 (text+ko) ====

@@ -48,5 +48,6 @@
 
 void *gdb_cpu_getreg(int, size_t *);
 void gdb_cpu_setreg(int, register_t);
+int gdb_cpu_query(void);
 
 #endif /* !_MACHINE_GDB_MACHDEP_H_ */