add shadow stack caveat to manual

1 files changed, 3 insertions, 0 deletions

diff --git a/tco_go.3 b/tco_go.3
index 19b8a10..ae7d2e4 100644
--- a/tco_go.3
+++ b/tco_go.3
@@ -50,6 +50,9 @@ restoring them later when the coroutine is resumed.
 This approach may be incompatible with other forms of black magic voodoo, your
 mileage may vary.
 .P
+The implementation is incompatible with control flow protection mechanisms such
+as shadow stacks as it relies on manipulating return addresses.
+.P
 .BR tco_args ()
 currently only supports arguments passed by registers
 .RI ( %rdi ", " %rsi ", " %rdx ", " %r10 ", " %r8 ", " %r9 " and " %xmm0-8 ).