Commit b7734529 authored by Yury Norov's avatar Yury Norov Committed by Yang Yingliang
Browse files

arm64: ilp32: add is_ilp32_compat_{task, thread} and TIF_32BIT_AARCH64 



hulk inclusion
category: feature
bugzilla: NA
CVE: NA
---------------------------

ILP32 tasks are needed to be distinguished from LP64 and AARCH32.
This patch adds helper functions is_ilp32_compat_{task,thread} and
thread flag TIF_32BIT_AARCH64 to address it. This is a preparation
for following patches in ILP32 patchset.

For consistency, SET_PERSONALITY is changed here accordingly.

Signed-off-by: default avatarAndrew Pinski <Andrew.Pinski@caviumnetworks.com>
Signed-off-by: default avatarPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>
Signed-off-by: default avatarChristoph Muellner <christoph.muellner@theobroma-systems.com>
Signed-off-by: default avatarYury Norov <ynorov@caviumnetworks.com>
Reviewed-by: default avatarDavid Daney <ddaney@caviumnetworks.com>
Signed-off-by: default avatarXiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: default avatarHanjun Guo &lt;guohanjun@huawei.com <mailto:guohanjun@huawei.com&gt;>
Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
parent d109269f

arch/arm64/include/asm/elf.h

+2 −0
Original line number Diff line number Diff line
@@ -146,6 +146,7 @@ typedef struct user_fpsimd_state elf_fpregset_t; 


#define SET_PERSONALITY(ex)						\

({									\

	clear_thread_flag(TIF_32BIT_AARCH64);				\

	clear_thread_flag(TIF_32BIT);					\

	current->personality &= ~READ_IMPLIES_EXEC;			\

})
@@ -207,6 +208,7 @@ typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG]; 
 */

#define COMPAT_SET_PERSONALITY(ex)					\

({									\

	clear_thread_flag(TIF_32BIT_AARCH64);				\

	set_thread_flag(TIF_32BIT);					\

 })

#define COMPAT_ARCH_DLINFO

arch/arm64/include/asm/is_compat.h

+28 −2
Original line number Diff line number Diff line
@@ -33,18 +33,44 @@ static inline int is_a32_compat_thread(struct thread_info *thread) 


#endif /* CONFIG_AARCH32_EL0 */



#ifdef CONFIG_ARM64_ILP32



static inline int is_ilp32_compat_task(void)

{

	return test_thread_flag(TIF_32BIT_AARCH64);

}



static inline int is_ilp32_compat_thread(struct thread_info *thread)

{

	return test_ti_thread_flag(thread, TIF_32BIT_AARCH64);

}



#else



static inline int is_ilp32_compat_task(void)

{

	return 0;

}



static inline int is_ilp32_compat_thread(struct thread_info *thread)

{

	return 0;

}



#endif /* CONFIG_ARM64_ILP32 */



#ifdef CONFIG_COMPAT



static inline int is_compat_task(void)

{

	return is_a32_compat_task();

	return is_a32_compat_task() || is_ilp32_compat_task();

}



#endif /* CONFIG_COMPAT */



static inline int is_compat_thread(struct thread_info *thread)

{

	return is_a32_compat_thread(thread);

	return is_a32_compat_thread(thread) || is_ilp32_compat_thread(thread);

}

arch/arm64/include/asm/thread_info.h

+2 −0
Original line number Diff line number Diff line
@@ -90,6 +90,7 @@ void arch_release_task_struct(struct task_struct *tsk); 
#define TIF_SVE			23	/* Scalable Vector Extension in use */

#define TIF_SVE_VL_INHERIT	24	/* Inherit sve_vl_onexec across exec */

#define TIF_SSBD		25	/* Wants SSB mitigation */

#define TIF_32BIT_AARCH64	26	/* 32 bit process on AArch64(ILP32) */



#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)

#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
@@ -105,6 +106,7 @@ void arch_release_task_struct(struct task_struct *tsk); 
#define _TIF_FSCHECK		(1 << TIF_FSCHECK)

#define _TIF_32BIT		(1 << TIF_32BIT)

#define _TIF_SVE		(1 << TIF_SVE)

#define _TIF_32BIT_AARCH64	(1 << TIF_32BIT_AARCH64)



#define _TIF_WORK_MASK		(_TIF_NEED_RESCHED | _TIF_SIGPENDING | \

				 _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE | \