1 files changed, 32 insertions, 0 deletions
diff --git a/lib/hook-functions.c b/lib/hook-functions.c
new file mode 100644
index 0000000..975520e
--- /dev/null
+++ b/lib/hook-functions.c
@@ -0,0 +1,32 @@
+#include "substitute.h"
+#include "substitute-internal.h"
+
+static uintptr_t patch_callback(UNUSED void *ctx, uintptr_t pc) {
+    printf("patch_callback: pc=%llx\n", (long long) pc);
+    return pc;
+}
+
+EXPORT
+int substitute_hook_functions(const struct substitute_function_hook *hooks,
+                              size_t nhooks,
+                              int options) {
+    (void) hooks; (void) nhooks;
+    int ret = SUBSTITUTE_OK;
+    void *stop_token;
+    if (!(options & SUBSTITUTE_DONT_STOP_THREADS)) {
+        if ((ret = stop_other_threads(&stop_token)))
+            return ret;
+    }
+    if (!(options & SUBSTITUTE_DONT_STOP_THREADS)) {
+        if ((ret = apply_pc_patch_callback(stop_token, patch_callback, NULL)))
+            goto fail;
+    }
+
+fail:
+    if (!(options & SUBSTITUTE_DONT_STOP_THREADS)) {
+        int r2 = resume_other_threads(stop_token);
+        if (!ret)
+            ret = r2;
+    }
+    return ret;
+}