Some tests may require to know the current RIP to compares tests results. Add
a function to read current RIP. This will be used by a test in this series.
Signed-off-by: Krish Sadhukhan <krish.sadhukhan@xxxxxxxxxx>
---
lib/x86/processor.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/lib/x86/processor.h b/lib/x86/processor.h
index 87112bd..5604874 100644
--- a/lib/x86/processor.h
+++ b/lib/x86/processor.h
@@ -489,6 +489,13 @@ static inline unsigned long long rdtsc(void)
return r;
}
+static inline u64 read_rip(void)
+{
+ u64 val;
+ asm volatile ("lea (%%rip),%0" : "=r"(val) : : "memory");
+ return val;
+}
+
/*
* Per the advice in the SDM, volume 2, the sequence "mfence; lfence"
* executed immediately before rdtsc ensures that rdtsc will be
--
2.27.0
