On 12/18/2014 05:07 AM, Dave Anderson wrote:
OK thanks -- although further testing showed that the patch needed a bit more
work
in netdump.c to prevent calling display_ELF_note() if:
(1) the architecture is not x86 or x86-64
(2) the note type is not NT_PRSTATUS or QEMU, because it would also erroneously
pass
pointers to other note types such as NT_PRPSINFO and NT_TASKSTRUCT.
Queued for crash-7.1.0:
https://github.com/crash-utility/crash/commit/e36a1eb28b30c12deb72ffc515747801facae913
Hello Dave,
I found something is missing in the committed patch. In dump_Elf64_Nhdr, qemu
note of X86
is not available to call display_ELF_note. The process is like below:
if (BITS32() && type == NT_PRSTATUS)
display_ELF_note
else
if (machine_type("X86_64"))
display_ELF_note
And about the fix, please check the attachment.
--
Regards
Qiao Nuohan
>From 992f826e0a590a023efe7cf663db6095baa52dbd Mon Sep 17 00:00:00 2001
From: Qiao Nuohan <[email protected]>
Date: Mon, 22 Dec 2014 11:56:26 +0800
Subject: [PATCH] qemu note
---
netdump.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/netdump.c b/netdump.c
index 1f1cb0b..3eaeeee 100644
--- a/netdump.c
+++ b/netdump.c
@@ -2271,10 +2271,14 @@ dump_Elf64_Nhdr(Elf64_Off offset, int store)
}
}
- if (BITS32() && (xen_core || (note->n_type == NT_PRSTATUS))) {
+ if (BITS32() && (xen_core || (note->n_type == NT_PRSTATUS) || qemuinfo)) {
if (nd->ofp && !XEN_CORE_DUMPFILE() && !(pc->flags2 & LIVE_DUMP)) {
- if (machine_type("X86") && (note->n_type == NT_PRSTATUS))
- display_ELF_note(EM_386, PRSTATUS_NOTE, note, nd->ofp);
+ if (machine_type("X86")) {
+ if (note->n_type == NT_PRSTATUS)
+ display_ELF_note(EM_386, PRSTATUS_NOTE, note, nd->ofp);
+ else if(qemuinfo)
+ display_ELF_note(EM_386, QEMU_NOTE, note, nd->ofp);
+ }
}
iptr = (int *)uptr;
--
1.8.5.3
--
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