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Branch Tracing with Intel MSR Registers - OpenRCE
http://www.openrce.org/blog/view/535/Branch_Tracing_with_Intel_MSR_Registers
Branch Tracing with Intel MSR Registers. The ability to "trace" code is rather useful and can be leveraged to ease the burden of a number of tasks ranging from standard issue debugging to vulnerability hunting to malware analysis and more. Debuggers such as OllyDbg implement code tracing via conventional single stepping.
Last branch records and branch tracing - CodeProject
https://www.codeproject.com/articles/517466/last-branch-records-and-branch-tracing
dynamic analysis - What is MSR Tracing? - Stack Exchange
https://reverseengineering.stackexchange.com/questions/2173/what-is-msr-tracing
Show activity on this post. MSR tracing generally refers to using the Intel Model-Specific Registers (MSRs) to obtain trace information from the CPU. Because modern (post-Pentium 4, generally) processors have hardware support for debugging, this can be faster than software-only solutions. There are a few ways this can be done:
How is the collection of MSR registers - Intel Communities
https://community.intel.com/t5/Software-Tuning-Performance/How-is-the-collection-of-MSR-registers/td-p/935160
That collect MSR/PCM counters ? As I understand it, I can collect counters through the perf or through driver on Linux allows to read and write in the MSR registers. Collected counters show the number of events for each thread (counters binding with thread) or the total number of events occurring in the device ( without binding to the thread ...
CPUID Enumeration and Architectural MSRs - Intel
https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/technical-documentation/cpuid-enumeration-and-architectural-msrs.html
Note The table above is not intended to provide full details of this leaf; see the Intel® 64 and IA-32 Architectures Software Developer’s Manual, Volume 2A (CPUID instruction), for full details on CPUID leaf 07H.. IA32_ARCH_CAPABILITIES MSR. Additional features are enumerated by the IA32_ARCH_CAPABILITIES MSR (MSR index 10AH). This is a read-only MSR that is supported …
Machine state register - Wikipedia
https://en.wikipedia.org/wiki/Machine_state_register
Enables/disables branch tracing FE1: Select floating-point exception mode IR: ... and the model-specific registers found in IA-32 and x86-64 architectures fulfill similar functions and the initialism "MSR" can refer to either, there are important differences that distinguish them. The machine state register, a single register, provides coarse ...
What is the overhead of using Intel Last Branch Record?
https://stackoverflow.com/questions/14670586/what-is-the-overhead-of-using-intel-last-branch-record
The paper Intel Code Execution Trace Resources (by Arium workers, Craig Pedersen and Jeff Acampora, Apr 29, 2012 ) lists three variants of branch tracing:. Last Branch Record (LBR) flag in the DebugCtlMSR and corresponding LastBranchToIP and LastBranchFromIP MSRs as well as LastExceptionToIP and LastExceptionFromIP MSRs. Branch Trace Store …
MSR Trace Events — The Linux Kernel documentation
https://www.kernel.org/doc/html/v5.2/trace/events-msr.html
Kprobe-based Event Tracing; Uprobe-tracer: Uprobe-based Event Tracing; Using the Linux Kernel Tracepoints; Event Tracing; Subsystem Trace Points: kmem; Subsystem Trace Points: power; NMI Trace Events; MSR Trace Events; In-kernel memory-mapped I/O tracing; Event Histograms; Hardware Latency Detector; Intel(R) Trace Hub (TH) System Trace Module ...
Speed up your fuzzfarm: fast hit tracing | GDTR
https://gdtr.wordpress.com/2012/05/11/fuzzing-hit-tracing/
2) Use the CPU hardware branch trace feature. A special debugger feature of most current x86 CPUs to monitor each branch instruction (both calls and jumps). There are two standard setups: A) One is setup via MSR registers (both Intel and AMD) to cause an exception on every branch (jumps and calls).
[git-pull -tip] x86: cpu architecture debug code - IU
http://lkml.iu.edu/hypermail/linux/kernel/0903.1/00006.html
The following changes since commit cb553adb4e83bc5314b5a0c397e546a215b19307: Ingo Molnar (1): Merge branch 'tracing/printk' are available in the git repository at:
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