From 469014c2cde959fa2ff8648427da5d79587b93e3 Mon Sep 17 00:00:00 2001
From: pk <pk@NetBSD.org>
Date: Tue, 7 Jan 2003 15:15:06 +0000
Subject: [PATCH] * Maintain a pointer to the cpu_info structure of the CPU
 being examined. * Force cpu_Debugger() to have a stack frame, so tracing can
 at least   start off matching arguments and function calls correctly.

---
 sys/arch/sparc/include/db_machdep.h | 4 +++-
 sys/arch/sparc/sparc/db_interface.c | 9 ++++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/sys/arch/sparc/include/db_machdep.h b/sys/arch/sparc/include/db_machdep.h
index 778ee7aa242a..ee959d6dd188 100644
--- a/sys/arch/sparc/include/db_machdep.h
+++ b/sys/arch/sparc/include/db_machdep.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: db_machdep.h,v 1.17 2001/11/09 06:52:24 thorpej Exp $ */
+/*	$NetBSD: db_machdep.h,v 1.18 2003/01/07 15:15:06 pk Exp $ */
 
 /*
  * Mach Operating System
@@ -63,6 +63,8 @@ db_regs_t		ddb_regs;	/* register state */
 #define	DDB_FR		(&ddb_regs.db_fr)
 #endif
 
+extern struct cpu_info *ddb_cpuinfo;
+
 #if defined(lint)
 #define	PC_REGS(regs)	((regs)->db_tf.tf_pc)
 #else
diff --git a/sys/arch/sparc/sparc/db_interface.c b/sys/arch/sparc/sparc/db_interface.c
index c93bf254b0f2..239b56f5cd4a 100644
--- a/sys/arch/sparc/sparc/db_interface.c
+++ b/sys/arch/sparc/sparc/db_interface.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: db_interface.c,v 1.47 2002/12/23 00:42:37 pk Exp $ */
+/*	$NetBSD: db_interface.c,v 1.48 2003/01/07 15:15:06 pk Exp $ */
 
 /*
  * Mach Operating System
@@ -111,10 +111,12 @@ db_write_bytes(addr, size, data)
 /*
  * Data and functions used by DDB only.
  */
+
 void
 cpu_Debugger()
 {
 	asm("ta 0x81");
+	sparc_noop();	/* Force this function to allocate a stack frame */
 }
 
 static int nil;
@@ -217,6 +219,9 @@ kdb_kbd_trap(tf)
 	}
 }
 
+/* struct cpu_info of CPU being investigated */
+struct cpu_info *ddb_cpuinfo;
+
 #ifdef MULTIPROCESSOR
 
 #define NOCPU -1
@@ -311,6 +316,7 @@ kdb_trap(type, tf)
 	}
 	curcpu()->ci_ddb_regs = ddb_regp = &dbreg;
 #endif
+	ddb_cpuinfo = curcpu();
 
 	/* Should switch to kdb`s own stack here. */
 
@@ -530,6 +536,7 @@ db_cpu_cmd(addr, have_addr, count, modif)
 	}
 	db_printf("using cpu %ld", addr);
 	ddb_regp = (void *)ci->ci_ddb_regs;
+	ddb_cpuinfo = ci;
 }
 
 #endif /* MULTIPROCESSOR */