feat: lunadbg GDB plugin to ease kernel debugging process.

[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
index a3553f104925466ff5ffb0b25034696a63a65d0e..1cf9ae34d37295a7251058d80813c978c7e84e12 100644 (file)
--- a/lunaix-os/kernel/debug/trace.c
+++ b/lunaix-os/kernel/debug/trace.c
@@ -1,5 +1,5 @@
-#include <lunaix/mm/mmio.h>
 #include <lunaix/mm/page.h>
+#include <lunaix/mm/vmm.h>
 #include <lunaix/process.h>
 #include <lunaix/spike.h>
 #include <lunaix/syslog.h>
@@ -23,13 +23,14 @@ trace_modksyms_init(struct boot_handoff* bhctx)
     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);
+            assert(PG_ALIGNED(mod->start));
+
             ptr_t end = ROUNDUP(mod->end, PG_SIZE);
-            ptr_t ksym_va = (ptr_t)ioremap(start, (end - start));
+            ptr_t ksym_va =
+              (ptr_t)vmap(mod->start, (end - mod->start), PG_PREM_R, 0);
 
-            trace_ctx.ksym_table =
-              (struct ksyms*)(ksym_va + (mod->start - start));
+            assert(ksym_va);
+            trace_ctx.ksym_table = (struct ksyms*)ksym_va;
         }
     }
 }
@@ -90,8 +91,10 @@ trace_walkback(struct trace_record* tb_buffer,
         ptr_t pc = *(frame + 1);
 
         current = trace_sym_lookup(pc);
-        tb_buffer[i] = (struct trace_record){ .pc = current ? current->pc : pc,
-                                              .symbol = ksym_getstr(current) };
+        tb_buffer[i] =
+          (struct trace_record){ .pc = pc,
+                                 .sym_pc = current ? current->pc : 0,
+                                 .symbol = ksym_getstr(current) };
 
         frame = (ptr_t*)*frame;
         i++;
@@ -104,19 +107,27 @@ trace_walkback(struct trace_record* tb_buffer,
     return i;
 }
 
+static inline void
+trace_print_code_entry(ptr_t sym_pc, ptr_t inst_pc, char* sym)
+{
+    DEBUG("%p+%p: %s", sym_pc, inst_pc - sym_pc, sym);
+}
+
 void
 trace_printstack_of(ptr_t fp)
 {
     struct trace_record tbs[NB_TRACEBACK];
 
+    // Let's get our Stackwalker does his job ;)
     int n = trace_walkback(tbs, fp, NB_TRACEBACK, &fp);
 
     if (fp) {
-        kprintf(KDEBUG "...<truncated>\n");
+        DEBUG("...<truncated>");
     }
 
     for (int i = 0; i < n; i++) {
-        kprintf(KDEBUG "%p: %s\n", tbs[i].pc, tbs[i].symbol);
+        struct trace_record* tb = &tbs[i];
+        trace_print_code_entry(tb->sym_pc, tb->pc, tb->symbol);
     }
 }
 
@@ -126,15 +137,19 @@ trace_printstack()
     trace_printstack_of(cpu_get_fp());
 }
 
-void
+static void
 trace_printswctx(const isr_param* p, char* direction)
 {
 
     struct ksym_entry* sym = trace_sym_lookup(p->execp->eip);
 
-    kprintf(
-      KDEBUG ">> (sw:%s) iv:%d, errno:%p <<\n", direction, p->execp->vector);
-    kprintf(KDEBUG "%p:%s\n", p->execp->eip, ksym_getstr(sym));
+    DEBUG(">> (sw:%s) iv:%d, errno:%p <<",
+          direction,
+          p->execp->vector,
+          p->execp->err_code);
+
+    ptr_t sym_pc = sym ? sym->pc : p->execp->eip;
+    trace_print_code_entry(sym_pc, p->execp->eip, ksym_getstr(sym));
 }
 
 void
@@ -142,10 +157,9 @@ trace_printstack_isr(const isr_param* isrm)
 {
     isr_param* p = isrm;
     ptr_t fp = cpu_get_fp();
-    int prev_fromusr = uspace_context(p);
+    int prev_fromusr = 0;
 
-    kprintf(KDEBUG "\n");
-    kprintf(KDEBUG "stack trace (pid=%d)\n", __current->pid);
+    DEBUG("stack trace (pid=%d)\n", __current->pid);
 
     trace_printstack_of(fp);
 
@@ -167,5 +181,4 @@ trace_printstack_isr(const isr_param* isrm)
 
         p = p->execp->saved_prev_ctx;
     }
-    kprintf(KDEBUG "\n");
 }
\ No newline at end of file