From f483155e078026395ef6bfbf4382aef642e57796 Mon Sep 17 00:00:00 2001
From: Nikolai Nosov <nnosov@gmail.com>
Date: Sat, 2 May 2020 13:56:39 +0400
Subject: [PATCH] special handling of CFA pseudo register since libunwind
 provides wron value

---
 src/libpst.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/libpst.c b/src/libpst.c
index ef4e392..9451ffa 100644
--- a/src/libpst.c
+++ b/src/libpst.c
@@ -70,6 +70,12 @@ pst_function* pst_function_next(pst_handler* handler, pst_function* current)
 
 int pst_get_register(pst_function* fn, int regno, unw_word_t* val)
 {
+    if(regno == UNW_X86_64_CFA) {
+        // intentionally return our own CFA obtained using libdw since libunwind returns wrong register value
+        *val = fn->info.cfa;
+        return 0;
+    }
+
     return unw_get_reg(&fn->context, regno, val);
 }