From: miles.chen@mediatek.com (Miles Chen)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] arm64: correct modules range of kernel virtual memory layout
Date: Mon, 7 Aug 2017 19:04:46 +0800 [thread overview]
Message-ID: <1502103886-19725-1-git-send-email-miles.chen@mediatek.com> (raw)
The commit f80fb3a3d508 ("arm64: add support for kernel ASLR")
moved module virtual address to
[module_alloc_base, module_alloc_base + MODULES_VSIZE).
Display module information of the virtual kernel
memory layout by using module_alloc_base.
testing output:
1) Current implementation:
Virtual kernel memory layout:
modules : 0xffffff8000000000 - 0xffffff8008000000 ( 128 MB)
2) this patch + KASLR:
Virtual kernel memory layout:
modules : 0xffffff8000560000 - 0xffffff8008560000 ( 128 MB)
3) this patch + KASLR and a dummy seed:
Virtual kernel memory layout:
modules : 0xffffffa7df637000 - 0xffffffa7e7637000 ( 128 MB)
Signed-off-by: Miles Chen <miles.chen@mediatek.com>
---
arch/arm64/mm/init.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 5960bef..57a11d5 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -52,6 +52,7 @@
#include <asm/sizes.h>
#include <asm/tlb.h>
#include <asm/alternative.h>
+#include <asm/module.h>
/*
* We need to be able to catch inadvertent references to memstart_addr
@@ -609,8 +610,8 @@ void __init mem_init(void)
pr_notice(" kasan : 0x%16lx - 0x%16lx (%6ld GB)\n",
MLG(KASAN_SHADOW_START, KASAN_SHADOW_END));
#endif
- pr_notice(" modules : 0x%16lx - 0x%16lx (%6ld MB)\n",
- MLM(MODULES_VADDR, MODULES_END));
+ pr_notice(" modules : 0x%16llx - 0x%16llx (%6lld MB)\n",
+ MLM(module_alloc_base, module_alloc_base + MODULES_VSIZE));
pr_notice(" vmalloc : 0x%16lx - 0x%16lx (%6ld GB)\n",
MLG(VMALLOC_START, VMALLOC_END));
pr_notice(" .text : 0x%p" " - 0x%p" " (%6ld KB)\n",
--
1.9.1
next reply other threads:[~2017-08-07 11:04 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-07 11:04 Miles Chen [this message]
2017-08-07 13:16 ` [PATCH] arm64: correct modules range of kernel virtual memory layout Will Deacon
2017-08-07 13:18 ` Ard Biesheuvel
2017-08-07 13:36 ` Miles Chen
2017-08-07 13:42 ` Ard Biesheuvel
2017-08-07 14:01 ` Will Deacon
2017-08-08 4:44 ` Miles Chen
2017-08-08 5:27 ` Miles Chen
2017-08-08 13:19 ` Will Deacon
2017-08-08 14:04 ` Ard Biesheuvel
2017-08-08 14:18 ` Will Deacon
2017-08-08 14:25 ` Ard Biesheuvel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1502103886-19725-1-git-send-email-miles.chen@mediatek.com \
--to=miles.chen@mediatek.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).