[Xen-devel] [PATCH v2 01/12] xenctx: Clean up stack trace when hypercall_page not in symbol table

[Don Slutz <dslutz@xxxxxxxxxxx>]

From: Don Slutz <Don@xxxxxxxxxxxxxxx>

Before:

Call Trace:
  [<ffffffff8006b2b0>] default_idle+0x29  <--
  [<ffffffff80048d19>] cpu_idle+0x95
  [<ffffffff803e7801>] start_kernel+0x220
  [<0000000000000000>] startup_64+0x80000000
  [<ffffffff803e722f>] x86_64_start_kernel+0x22f
  [<0000000000000000>] startup_64+0x80000000
  [<0000000000000000>] startup_64+0x80000000
  [<0000000000000000>] startup_64+0x80000000
  [<0000000000000000>] startup_64+0x80000000

After:

Call Trace:
  [<ffffffff8006b2b0>] default_idle+0x29  <--
  [<ffffffff80048d19>] cpu_idle+0x95
  [<ffffffff803e7801>] start_kernel+0x220
  [<ffffffff803e722f>] x86_64_start_kernel+0x22f

Signed-off-by: Don Slutz <Don@xxxxxxxxxxxxxxx>
---
 tools/xentrace/xenctx.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/xentrace/xenctx.c b/tools/xentrace/xenctx.c
index 060e480..10292fa 100644
--- a/tools/xentrace/xenctx.c
+++ b/tools/xentrace/xenctx.c
@@ -83,8 +83,9 @@ static int is_kernel_text(guest_word_t addr)
     if (addr >= kernel_stext &&
         addr <= kernel_etext)
         return 1;
-    if (addr >= kernel_hypercallpage &&
-        addr <= kernel_hypercallpage + 4096)
+    if (kernel_hypercallpage &&
+        (addr >= kernel_hypercallpage &&
+         addr <= kernel_hypercallpage + 4096))
         return 1;
     if (addr >= kernel_sinittext &&
         addr <= kernel_einittext)
-- 
1.7.1


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