From 0739b87ee9bca1155746e659d4c24ec902646386 Mon Sep 17 00:00:00 2001
From: Ingo Weinhold <ingo_weinhold@gmx.de>
Date: Fri, 22 Aug 2008 23:59:21 +0000
Subject: [PATCH] * Added arch_debug_get_interrupt_pc(), which is supposed to
 return the   PC of the innermost iframe. * The "in_context" command does now
 set the currently debugged thread   respectively.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27166 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 headers/private/kernel/arch/debug.h        |  1 +
 src/system/kernel/arch/m68k/arch_debug.cpp |  8 ++++++++
 src/system/kernel/arch/ppc/arch_debug.cpp  |  8 ++++++++
 src/system/kernel/arch/x86/arch_debug.cpp  | 18 ++++++++++++++++++
 4 files changed, 35 insertions(+)

diff --git a/headers/private/kernel/arch/debug.h b/headers/private/kernel/arch/debug.h
index 5a273bfa57..534f64c8de 100644
--- a/headers/private/kernel/arch/debug.h
+++ b/headers/private/kernel/arch/debug.h
@@ -23,6 +23,7 @@ status_t arch_debug_init(kernel_args *args);
 void *arch_debug_get_caller(void);
 int32 arch_debug_get_stack_trace(addr_t* returnAddresses, int32 maxCount,
 		int32 skipFrames, bool userOnly);
+void *arch_debug_get_interrupt_pc();
 bool arch_debug_contains_call(struct thread *thread, const char *symbol,
 		addr_t start, addr_t end);
 void arch_debug_save_registers(int *);
diff --git a/src/system/kernel/arch/m68k/arch_debug.cpp b/src/system/kernel/arch/m68k/arch_debug.cpp
index 25f88a4db5..9895430860 100644
--- a/src/system/kernel/arch/m68k/arch_debug.cpp
+++ b/src/system/kernel/arch/m68k/arch_debug.cpp
@@ -339,6 +339,14 @@ arch_debug_get_stack_trace(addr_t* returnAddresses, int32 maxCount,
 }
 
 
+void*
+arch_debug_get_interrupt_pc()
+{
+	// TODO: Implement!
+	return NULL;
+}
+
+
 status_t
 arch_debug_init(kernel_args *args)
 {
diff --git a/src/system/kernel/arch/ppc/arch_debug.cpp b/src/system/kernel/arch/ppc/arch_debug.cpp
index 94581ac3d1..bfa7fd3c4e 100644
--- a/src/system/kernel/arch/ppc/arch_debug.cpp
+++ b/src/system/kernel/arch/ppc/arch_debug.cpp
@@ -286,6 +286,14 @@ arch_debug_get_caller(void)
 }
 
 
+void*
+arch_debug_get_interrupt_pc()
+{
+	// TODO: Implement!
+	return NULL;
+}
+
+
 status_t
 arch_debug_init(kernel_args *args)
 {
diff --git a/src/system/kernel/arch/x86/arch_debug.cpp b/src/system/kernel/arch/x86/arch_debug.cpp
index 8d984dfee5..17580da045 100644
--- a/src/system/kernel/arch/x86/arch_debug.cpp
+++ b/src/system/kernel/arch/x86/arch_debug.cpp
@@ -596,9 +596,13 @@ cmd_in_context(int argc, char** argv)
 		}
 	}
 
+	struct thread* previousThread = debug_set_debugged_thread(thread);
+
 	// execute the command
 	evaluate_debug_command(commandLine);
 
+	debug_set_debugged_thread(previousThread);
+
 	// reset the page directory
 	if (oldPageDirectory)
 		write_cr3(oldPageDirectory);
@@ -699,6 +703,20 @@ arch_debug_get_stack_trace(addr_t* returnAddresses, int32 maxCount,
 	return count;
 }
 
+/*!	Returns the program counter of this thread where the innermost interrupts
+	happened. Returns \c NULL, if there's none or a problem occurred retrieving
+	it.
+*/
+void*
+arch_debug_get_interrupt_pc()
+{
+	struct iframe* frame = i386_get_current_iframe();
+	if (frame == NULL)
+		return NULL;
+
+	return (void*)(addr_t)frame->eip;
+}
+
 
 status_t
 arch_debug_init(kernel_args *args)