Add extra argument to substitute_hook_functions and interpose_imports for use with unhooking.

I think we'll need to explicitly record trampoline locations to avoid
the possibility of stomping on someone else's stuff if the function was
re-patched...

Also, document substitute_hook_functions.

1 files changed, 2 insertions, 1 deletions

diff --git a/test/test-hook-functions.c b/test/test-hook-functions.c
index 7978658..d5ed4d8 100644
--- a/test/test-hook-functions.c
+++ b/test/test-hook-functions.c
@@ -58,7 +58,8 @@ int main() {
     }
     printf("getpid() => %d\n", getpid());
     break_before();
-    int ret = substitute_hook_functions(hooks, sizeof(hooks)/sizeof(*hooks), 0);
+    int ret = substitute_hook_functions(hooks, sizeof(hooks)/sizeof(*hooks),
+                                        NULL, 0);
     break_after();
     int e = errno;
     printf("ret = %d\n", ret);