From: Zong Li <zong.li@sifive.com>
To: paul.walmsley@sifive.com, palmer@dabbelt.com,
aou@eecs.berkeley.edu, linux-riscv@lists.infradead.org,
linux-kernel@vger.kernel.org
Cc: Zong Li <zong.li@sifive.com>
Subject: [PATCH 4/8] riscv: move exception table immediately after RO_DATA
Date: Mon, 17 Feb 2020 16:32:19 +0800 [thread overview]
Message-ID: <20200217083223.2011-5-zong.li@sifive.com> (raw)
In-Reply-To: <20200217083223.2011-1-zong.li@sifive.com>
Move EXCEPTION_TABLE immediately after RO_DATA. Make it easy to set the
attribution of the sections which should be read-only at a time.
Move .sdata to indicate the start of data section with write permission.
This patch is prepared for STRICT_KERNEL_RWX support.
Signed-off-by: Zong Li <zong.li@sifive.com>
---
arch/riscv/kernel/vmlinux.lds.S | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/riscv/kernel/vmlinux.lds.S b/arch/riscv/kernel/vmlinux.lds.S
index 1e0193ded420..4ba8a5397e8b 100644
--- a/arch/riscv/kernel/vmlinux.lds.S
+++ b/arch/riscv/kernel/vmlinux.lds.S
@@ -9,6 +9,7 @@
#include <asm/page.h>
#include <asm/cache.h>
#include <asm/thread_info.h>
+#include <asm/set_memory.h>
OUTPUT_ARCH(riscv)
ENTRY(_start)
@@ -52,12 +53,15 @@ SECTIONS
}
/* Start of data section */
- _sdata = .;
RO_DATA(L1_CACHE_BYTES)
.srodata : {
*(.srodata*)
}
+ EXCEPTION_TABLE(0x10)
+
+ _sdata = .;
+
RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
.sdata : {
__global_pointer$ = . + 0x800;
@@ -69,8 +73,6 @@ SECTIONS
BSS_SECTION(PAGE_SIZE, PAGE_SIZE, 0)
- EXCEPTION_TABLE(0x10)
-
.rel.dyn : {
*(.rel.dyn*)
}
--
2.25.0
next prev parent reply other threads:[~2020-02-17 8:32 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-17 8:32 [PATCH 0/8] Support strict kernel memory permissions for security Zong Li
2020-02-17 8:32 ` [PATCH 1/8] riscv: add ARCH_HAS_SET_MEMORY support Zong Li
2020-03-05 0:57 ` Palmer Dabbelt
2020-02-17 8:32 ` [PATCH 2/8] riscv: add ARCH_HAS_SET_DIRECT_MAP support Zong Li
2020-03-05 0:57 ` Palmer Dabbelt
2020-02-17 8:32 ` [PATCH 3/8] riscv: add ARCH_SUPPORTS_DEBUG_PAGEALLOC support Zong Li
2020-03-05 0:57 ` Palmer Dabbelt
2020-02-17 8:32 ` Zong Li [this message]
2020-03-05 0:57 ` [PATCH 4/8] riscv: move exception table immediately after RO_DATA Palmer Dabbelt
2020-03-05 4:01 ` Zong Li
2020-02-17 8:32 ` [PATCH 5/8] riscv: add alignment for text, rodata and data sections Zong Li
2020-03-05 0:58 ` Palmer Dabbelt
2020-02-17 8:32 ` [PATCH 6/8] riscv: add STRICT_KERNEL_RWX support Zong Li
2020-03-05 1:21 ` Palmer Dabbelt
2020-03-05 4:08 ` Zong Li
2020-02-17 8:32 ` [PATCH 7/8] riscv: add DEBUG_WX support Zong Li
2020-03-05 1:44 ` Palmer Dabbelt
2020-03-05 5:53 ` Zong Li
2020-02-17 8:32 ` [PATCH 8/8] riscv: add two hook functions of ftrace Zong Li
2020-03-05 1:44 ` Palmer Dabbelt
2020-03-05 4:27 ` Zong Li
2020-03-05 15:55 ` [PATCH 0/8] Support strict kernel memory permissions for security Palmer Dabbelt
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