refactor: one more step towards arch-agnostic design

[lunaix-os.git] / lunaix-os / kernel / debug / trace.c

diff --git a/lunaix-os/kernel/debug/trace.c b/lunaix-os/kernel/debug/trace.c
new file mode 100644 (file)
index 0000000..c08a6f7
--- /dev/null
+++ b/lunaix-os/kernel/debug/trace.c
@@ -0,0 +1,37 @@
+#include <lunaix/mm/mmio.h>
+#include <lunaix/mm/page.h>
+#include <lunaix/spike.h>
+#include <lunaix/trace.h>
+
+#include <klibc/string.h>
+
+static struct trace_context trace_ctx;
+
+void
+trace_modksyms_init(struct boot_handoff* bhctx)
+{
+    struct boot_modent* modents = bhctx->mods.entries;
+    for (size_t i = 0; i < bhctx->mods.mods_num; i++) {
+        struct boot_modent* mod = &bhctx->mods.entries[i];
+        if (streq(mod->str, "modksyms")) {
+            // In case boot loader does not place our ksyms on page boundary
+            ptr_t start = PG_ALIGN(mod->start);
+            ptr_t end = ROUNDUP(mod->end, PG_SIZE);
+            ptr_t ksym_va = (ptr_t)ioremap(start, (end - start));
+
+            trace_ctx.ksym_table =
+              (struct ksyms*)(ksym_va + (mod->start - start));
+        }
+    }
+}
+
+struct ksym_entry*
+trace_sym_lookup(ptr_t pc)
+{
+    return NULL;
+}
+
+void
+trace_walkback(ptr_t fp)
+{
+}
\ No newline at end of file