From: Jiaxun Yang <jiaxun.yang@flygoat.com>
To: linux-mips@vger.kernel.org
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Kees Cook <keescook@chromium.org>, Borislav Petkov <bp@suse.de>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Fangrui Song <maskray@google.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 2/3] MIPS: Move kernel head into a standalone section
Date: Wed, 27 May 2020 14:34:33 +0800 [thread overview]
Message-ID: <20200527063438.391949-3-jiaxun.yang@flygoat.com> (raw)
In-Reply-To: <20200527063438.391949-1-jiaxun.yang@flygoat.com>
That's what already done by Arm64 and other architectures.
That would allow us put more things like PE headers safely into
the header.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
arch/mips/kernel/head.S | 4 ++--
arch/mips/kernel/vmlinux.lds.S | 8 ++++++--
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S
index c7c2795837e7..8081a905a71c 100644
--- a/arch/mips/kernel/head.S
+++ b/arch/mips/kernel/head.S
@@ -59,6 +59,8 @@
#endif
.endm
+ __HEAD
+_head:
#ifndef CONFIG_NO_EXCEPT_FILL
/*
* Reserved space for exception handlers.
@@ -67,8 +69,6 @@
.fill 0x400
#endif
-EXPORT(_stext)
-
/*
* Give us a fighting chance of running if execution beings at the
* kernel load address. This is needed because this platform does
diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
index f185a85a27c1..b9ace667b82b 100644
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -57,8 +57,12 @@ SECTIONS
#endif
. = LINKER_LOAD_ADDRESS;
/* read-only */
- _text = .; /* Text and read-only data */
- .text : {
+ .head.text : {
+ _text = .;
+ HEAD_TEXT
+ }
+ .text : { /* Real text segment */
+ _stext = .; /* Text and read-only data */
TEXT_TEXT
SCHED_TEXT
CPUIDLE_TEXT
--
2.27.0.rc0
next prev parent reply other threads:[~2020-05-27 6:35 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-27 6:34 [PATCH v2 0/3] Buggy bootloader workaround v2 Jiaxun Yang
2020-05-27 6:34 ` [PATCH v2 1/3] MIPS: head.S: Always jump to kernel_entry at head of text Jiaxun Yang
2020-05-27 11:41 ` Thomas Bogendoerfer
2020-05-27 6:34 ` Jiaxun Yang [this message]
2020-05-27 11:53 ` [PATCH v2 2/3] MIPS: Move kernel head into a standalone section Thomas Bogendoerfer
2020-05-27 12:05 ` Jiaxun Yang
2020-05-27 13:33 ` Thomas Bogendoerfer
2020-05-27 6:34 ` [PATCH v2 3/3] MIPS: Loongson64: select NO_EXCEPT_FILL Jiaxun Yang
2020-05-27 11:47 ` Thomas Bogendoerfer
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