From: Kefeng Wang <wangkefeng.wang@huawei.com>
To: <arnd@arndb.de>, <linux-arch@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linuxppc-dev@lists.ozlabs.org>,
<rostedt@goodmis.org>, <mingo@redhat.com>, <davem@davemloft.net>,
<ast@kernel.org>, <ryabinin.a.a@gmail.com>,
<akpm@linux-foundation.org>
Cc: <mpe@ellerman.id.au>, <benh@kernel.crashing.org>,
<paulus@samba.org>, <bpf@vger.kernel.org>,
<linux-alpha@vger.kernel.org>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Kefeng Wang <wangkefeng.wang@huawei.com>
Subject: [PATCH v4 06/11] sections: Provide internal __is_kernel() and __is_kernel_text() helper
Date: Thu, 30 Sep 2021 15:11:38 +0800 [thread overview]
Message-ID: <20210930071143.63410-7-wangkefeng.wang@huawei.com> (raw)
In-Reply-To: <20210930071143.63410-1-wangkefeng.wang@huawei.com>
An internal __is_kernel() helper which only check the
kernel address ranges, and an internal __is_kernel_text()
helper which only check text section ranges.
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
include/asm-generic/sections.h | 29 +++++++++++++++++++++++++++++
include/linux/kallsyms.h | 4 ++--
2 files changed, 31 insertions(+), 2 deletions(-)
diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index 811583ca8bd0..a7abeadddc7a 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -186,4 +186,33 @@ static inline bool is_kernel_inittext(unsigned long addr)
addr < (unsigned long)_einittext;
}
+/**
+ * __is_kernel_text - checks if the pointer address is located in the
+ * .text section
+ *
+ * @addr: address to check
+ *
+ * Returns: true if the address is located in .text, false otherwise.
+ * Note: an internal helper, only check the range of _stext to _etext.
+ */
+static inline bool __is_kernel_text(unsigned long addr)
+{
+ return addr >= (unsigned long)_stext &&
+ addr < (unsigned long)_etext;
+}
+
+/**
+ * __is_kernel - checks if the pointer address is located in the kernel range
+ *
+ * @addr: address to check
+ *
+ * Returns: true if the address is located in the kernel range, false otherwise.
+ * Note: an internal helper, only check the range of _stext to _end.
+ */
+static inline bool __is_kernel(unsigned long addr)
+{
+ return addr >= (unsigned long)_stext &&
+ addr < (unsigned long)_end;
+}
+
#endif /* _ASM_GENERIC_SECTIONS_H_ */
diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h
index 8a9d329c927c..5fb17dd4b6fa 100644
--- a/include/linux/kallsyms.h
+++ b/include/linux/kallsyms.h
@@ -26,14 +26,14 @@ struct module;
static inline int is_kernel_text(unsigned long addr)
{
- if ((addr >= (unsigned long)_stext && addr < (unsigned long)_etext))
+ if (__is_kernel_text(addr))
return 1;
return in_gate_area_no_mm(addr);
}
static inline int is_kernel(unsigned long addr)
{
- if (addr >= (unsigned long)_stext && addr < (unsigned long)_end)
+ if (__is_kernel(addr))
return 1;
return in_gate_area_no_mm(addr);
}
--
2.26.2
next prev parent reply other threads:[~2021-09-30 7:09 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-30 7:11 [PATCH v4 00/11] sections: Unify kernel sections range check and use Kefeng Wang
2021-09-30 7:11 ` [PATCH v4 01/11] kallsyms: Remove arch specific text and data check Kefeng Wang
2021-09-30 7:11 ` [PATCH v4 02/11] kallsyms: Fix address-checks for kernel related range Kefeng Wang
2021-09-30 7:11 ` [PATCH v4 03/11] sections: Move and rename core_kernel_data() to is_kernel_core_data() Kefeng Wang
2021-09-30 7:11 ` [PATCH v4 04/11] sections: Move is_kernel_inittext() into sections.h Kefeng Wang
2021-09-30 7:11 ` [PATCH v4 05/11] x86: mm: Rename __is_kernel_text() to is_x86_32_kernel_text() Kefeng Wang
2021-09-30 7:11 ` Kefeng Wang [this message]
2021-09-30 7:11 ` [PATCH v4 07/11] mm: kasan: Use is_kernel() helper Kefeng Wang
2021-09-30 15:45 ` Alexander Potapenko
2021-10-03 17:19 ` Andrey Konovalov
2021-09-30 7:11 ` [PATCH v4 08/11] extable: Use is_kernel_text() helper Kefeng Wang
2021-09-30 7:11 ` [PATCH v4 09/11] powerpc/mm: Use core_kernel_text() helper Kefeng Wang
2021-09-30 7:11 ` [PATCH v4 10/11] microblaze: Use is_kernel_text() helper Kefeng Wang
2021-09-30 10:13 ` Michal Simek
2021-09-30 7:11 ` [PATCH v4 11/11] alpha: " Kefeng Wang
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