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sections: provide internal __is_kernel() and __is_kernel_text() helper
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. Link: https://lkml.kernel.org/r/20210930071143.63410-7-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Alexander Potapenko <glider@google.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Paul Mackerras <paulus@samba.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -172,4 +172,33 @@ static inline bool is_kernel_inittext(unsigned long addr)
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addr < (unsigned long)_einittext;
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}
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/**
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* __is_kernel_text - checks if the pointer address is located in the
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* .text section
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*
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* @addr: address to check
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*
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* Returns: true if the address is located in .text, false otherwise.
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* Note: an internal helper, only check the range of _stext to _etext.
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*/
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static inline bool __is_kernel_text(unsigned long addr)
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{
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return addr >= (unsigned long)_stext &&
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addr < (unsigned long)_etext;
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}
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/**
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* __is_kernel - checks if the pointer address is located in the kernel range
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*
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* @addr: address to check
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*
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* Returns: true if the address is located in the kernel range, false otherwise.
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* Note: an internal helper, only check the range of _stext to _end.
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*/
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static inline bool __is_kernel(unsigned long addr)
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{
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return addr >= (unsigned long)_stext &&
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addr < (unsigned long)_end;
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}
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#endif /* _ASM_GENERIC_SECTIONS_H_ */
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@ -26,14 +26,14 @@ struct module;
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static inline int is_kernel_text(unsigned long addr)
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{
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if ((addr >= (unsigned long)_stext && addr < (unsigned long)_etext))
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if (__is_kernel_text(addr))
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return 1;
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return in_gate_area_no_mm(addr);
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}
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static inline int is_kernel(unsigned long addr)
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{
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if (addr >= (unsigned long)_stext && addr < (unsigned long)_end)
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if (__is_kernel(addr))
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return 1;
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return in_gate_area_no_mm(addr);
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}
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