diff mbox series

[PULL,02/13] dump: Update correct kdump phys_base field for AArch64

Message ID 20180319183415.1976-3-peter.maydell@linaro.org
State Accepted
Commit 68cbecfdd7afbfdf9cb06a87a2a297e8a6add7d7
Headers show
Series target-arm queue | expand

Commit Message

Peter Maydell March 19, 2018, 6:34 p.m. UTC 
From: Wei Huang <wei@redhat.com>


For guest kernel that supports KASLR, the load address can change every
time when guest VM runs. To find the physical base address correctly,
current QEMU dump searches VMCOREINFO for the string "NUMBER(phys_base)=".
However this string pattern is only available on x86_64. AArch64 uses a
different field, called "NUMBER(PHYS_OFFSET)=". This patch makes sure
QEMU dump uses the correct string on AArch64.

Signed-off-by: Wei Huang <wei@redhat.com>

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

Message-id: 1520615003-20869-1-git-send-email-wei@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

---
 dump.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

-- 
2.16.2
diff mbox series

Patch

diff --git a/dump.c b/dump.c
index 097e60b2b3..6bdb0dbe23 100644
--- a/dump.c
+++ b/dump.c
@@ -1609,10 +1609,18 @@  static void vmcoreinfo_update_phys_base(DumpState *s)
 
     lines = g_strsplit((char *)vmci, "\n", -1);
     for (i = 0; lines[i]; i++) {
-        if (g_str_has_prefix(lines[i], "NUMBER(phys_base)=")) {
-            if (qemu_strtou64(lines[i] + 18, NULL, 16,
+        const char *prefix = NULL;
+
+        if (s->dump_info.d_machine == EM_X86_64) {
+            prefix = "NUMBER(phys_base)=";
+        } else if (s->dump_info.d_machine == EM_AARCH64) {
+            prefix = "NUMBER(PHYS_OFFSET)=";
+        }
+
+        if (prefix && g_str_has_prefix(lines[i], prefix)) {
+            if (qemu_strtou64(lines[i] + strlen(prefix), NULL, 16,
                               &phys_base) < 0) {
-                warn_report("Failed to read NUMBER(phys_base)=");
+                warn_report("Failed to read %s", prefix);
             } else {
                 s->dump_info.phys_base = phys_base;
             }