diff options
author | Yury Norov <ynorov@caviumnetworks.com> | 2016-05-24 03:04:43 +0300 |
---|---|---|
committer | Christoph Muellner <christoph.muellner@theobroma-systems.com> | 2018-04-26 21:43:42 +0200 |
commit | cf76d46c65be4fd825d8e27280b54c1db88d0a30 (patch) | |
tree | 11eff090c2a88fa187aad796f03a8e5de198b868 | |
parent | 813e409484c3cd61f566215d19f78c9c497992b5 (diff) |
arm64: ilp32: add is_ilp32_compat_{task,thread} and TIF_32BIT_AARCH64
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: Andrew Pinski <Andrew.Pinski@caviumnetworks.com>
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Reviewed-by: David Daney <ddaney@caviumnetworks.com>
-rw-r--r-- | arch/arm64/include/asm/elf.h | 2 | ||||
-rw-r--r-- | arch/arm64/include/asm/is_compat.h | 30 | ||||
-rw-r--r-- | arch/arm64/include/asm/thread_info.h | 2 |
3 files changed, 32 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h index b4b10eefc667..023b2fbc1454 100644 --- a/arch/arm64/include/asm/elf.h +++ b/arch/arm64/include/asm/elf.h @@ -143,6 +143,7 @@ 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; \ }) @@ -194,6 +195,7 @@ 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 diff --git a/arch/arm64/include/asm/is_compat.h b/arch/arm64/include/asm/is_compat.h index 8dba5caaf5d1..7726bebc4115 100644 --- a/arch/arm64/include/asm/is_compat.h +++ b/arch/arm64/include/asm/is_compat.h @@ -45,18 +45,44 @@ 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); } diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h index 6d2d58daa9d7..8ed56630e6a5 100644 --- a/arch/arm64/include/asm/thread_info.h +++ b/arch/arm64/include/asm/thread_info.h @@ -94,6 +94,7 @@ void arch_release_task_struct(struct task_struct *tsk); #define TIF_32BIT 22 /* AARCH32 process */ #define TIF_SVE 23 /* Scalable Vector Extension in use */ #define TIF_SVE_VL_INHERIT 24 /* Inherit sve_vl_onexec across exec */ +#define TIF_32BIT_AARCH64 25 /* 32 bit process on AArch64(ILP32) */ #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) @@ -108,6 +109,7 @@ 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 | \ |