From 9b5ab1889ec17a014d8a94be1a69761d1be30eb9 Mon Sep 17 00:00:00 2001 From: Markus Metzger Date: Fri, 17 Oct 2008 09:09:27 +0200 Subject: [PATCH] --- yaml --- r: 118126 b: refs/heads/master c: 531f6ed7de911e975352fbb2b228367121da630a h: refs/heads/master v: v3 --- [refs] | 2 +- trunk/arch/x86/Kconfig.cpu | 24 ++++++++++++------------ 2 files changed, 13 insertions(+), 13 deletions(-) diff --git a/[refs] b/[refs] index f38207fab9c3..be553531ae7c 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: 71cced6eb044f5b096d35755963f3a2035603b73 +refs/heads/master: 531f6ed7de911e975352fbb2b228367121da630a diff --git a/trunk/arch/x86/Kconfig.cpu b/trunk/arch/x86/Kconfig.cpu index 0b7c4a3f0651..b815664fe370 100644 --- a/trunk/arch/x86/Kconfig.cpu +++ b/trunk/arch/x86/Kconfig.cpu @@ -513,19 +513,19 @@ config CPU_SUP_UMC_32 If unsure, say N. config X86_DS - bool "Debug Store support" - default y - help - Add support for Debug Store. - This allows the kernel to provide a memory buffer to the hardware - to store various profiling and tracing events. + def_bool X86_PTRACE_BTS + depends on X86_DEBUGCTLMSR config X86_PTRACE_BTS - bool "ptrace interface to Branch Trace Store" + bool "Branch Trace Store" default y - depends on (X86_DS && X86_DEBUGCTLMSR) + depends on X86_DEBUGCTLMSR help - Add a ptrace interface to allow collecting an execution trace - of the traced task. - This collects control flow changes in a (cyclic) buffer and allows - debuggers to fill in the gaps and show an execution trace of the debuggee. + This adds a ptrace interface to the hardware's branch trace store. + + Debuggers may use it to collect an execution trace of the debugged + application in order to answer the question 'how did I get here?'. + Debuggers may trace user mode as well as kernel mode. + + Say Y unless there is no application development on this machine + and you want to save a small amount of code size.