X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/2236410f4582ab45ae8c384dd6eeeef5d10aab15..59ecf21e36b2332f6adf2a568ef555283d8c119a:/lunaix-os/kernel/debug/trace.c

diff --git a/lunaix-os/kernel/debug/trace.c b/lunaix-os/kernel/debug/trace.c
index 1235884..8c5c180 100644
--- a/lunaix-os/kernel/debug/trace.c
+++ b/lunaix-os/kernel/debug/trace.c
@@ -77,6 +77,10 @@ ksym_getstr(struct ksym_entry* sym)
                    trace_ctx.ksym_table->ksym_label_off + sym->label_off);
 }
 
+static inline bool valid_fp(ptr_t ptr) {
+    return KERNEL_STACK < ptr && ptr < KERNEL_EXEC_END;
+}
+
 int
 trace_walkback(struct trace_record* tb_buffer,
                ptr_t fp,
@@ -87,7 +91,7 @@ trace_walkback(struct trace_record* tb_buffer,
     struct ksym_entry* current = NULL;
     int i = 0;
 
-    while (frame && i < limit) {
+    while (valid_fp((ptr_t)frame) && i < limit) {
         ptr_t pc = *(frame + 1);
 
         current = trace_sym_lookup(pc);
@@ -148,7 +152,8 @@ trace_printswctx(const isr_param* p, char* direction)
           p->execp->vector,
           p->execp->err_code);
 
-    trace_print_code_entry(sym->pc, p->execp->eip, ksym_getstr(sym));
+    ptr_t sym_pc = sym ? sym->pc : p->execp->eip;
+    trace_print_code_entry(sym_pc, p->execp->eip, ksym_getstr(sym));
 }
 
 void