From: ynorov@caviumnetworks.com (Yury Norov)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 08/18] arm64: ilp32: add is_ilp32_compat_{task, thread} and TIF_32BIT_AARCH64
Date: Wed, 17 Aug 2016 14:46:33 +0300 [thread overview]
Message-ID: <1471434403-25291-9-git-send-email-ynorov@caviumnetworks.com> (raw)
In-Reply-To: <1471434403-25291-1-git-send-email-ynorov@caviumnetworks.com>
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>
---
arch/arm64/include/asm/elf.h | 13 +++++++++++--
arch/arm64/include/asm/is_compat.h | 30 ++++++++++++++++++++++++++++--
arch/arm64/include/asm/thread_info.h | 2 ++
3 files changed, 41 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h
index 6a9049b..f259fe8 100644
--- a/arch/arm64/include/asm/elf.h
+++ b/arch/arm64/include/asm/elf.h
@@ -142,7 +142,11 @@ typedef struct user_fpsimd_state elf_fpregset_t;
*/
#define ELF_PLAT_INIT(_r, load_addr) (_r)->regs[0] = 0
-#define SET_PERSONALITY(ex) clear_thread_flag(TIF_32BIT);
+#define SET_PERSONALITY(ex) \
+do { \
+ clear_thread_flag(TIF_32BIT_AARCH64); \
+ clear_thread_flag(TIF_32BIT); \
+} while (0)
/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
#define ARCH_DLINFO \
@@ -183,7 +187,12 @@ typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG];
((x)->e_flags & EF_ARM_EABI_MASK))
#define compat_start_thread compat_start_thread
-#define COMPAT_SET_PERSONALITY(ex) set_thread_flag(TIF_32BIT);
+#define COMPAT_SET_PERSONALITY(ex) \
+do { \
+ clear_thread_flag(TIF_32BIT_AARCH64); \
+ set_thread_flag(TIF_32BIT); \
+} while (0)
+
#define COMPAT_ARCH_DLINFO
extern int aarch32_setup_vectors_page(struct linux_binprm *bprm,
int uses_interp);
diff --git a/arch/arm64/include/asm/is_compat.h b/arch/arm64/include/asm/is_compat.h
index 8dba5ca..7726beb 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 4daa559..8802645 100644
--- a/arch/arm64/include/asm/thread_info.h
+++ b/arch/arm64/include/asm/thread_info.h
@@ -119,6 +119,7 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_RESTORE_SIGMASK 20
#define TIF_SINGLESTEP 21
#define TIF_32BIT 22 /* AARCH32 process */
+#define TIF_32BIT_AARCH64 23 /* 32 bit process on AArch64(ILP32) */
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
@@ -130,6 +131,7 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
#define _TIF_32BIT (1 << TIF_32BIT)
+#define _TIF_32BIT_AARCH64 (1 << TIF_32BIT_AARCH64)
#define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
_TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE)
--
2.7.4
next prev parent reply other threads:[~2016-08-17 11:46 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-17 11:46 [RFC2 nowrap: PATCH v7 00/18] ILP32 for ARM64 Yury Norov
2016-08-17 11:46 ` [PATCH 01/18] 32-bit ABI: introduce ARCH_32BIT_OFF_T config option Yury Norov
2016-08-17 11:46 ` [PATCH 02/18] arm64: ilp32: add documentation on the ILP32 ABI for ARM64 Yury Norov
2016-08-17 11:46 ` [PATCH 03/18] arm64: ensure the kernel is compiled for LP64 Yury Norov
2016-08-17 11:46 ` [PATCH 04/18] arm64: rename COMPAT to AARCH32_EL0 in Kconfig Yury Norov
2016-08-17 11:46 ` [PATCH 05/18] arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64 Yury Norov
2016-08-17 11:46 ` [PATCH 06/18] thread: move thread bits accessors to separated file Yury Norov
2016-08-17 11:46 ` [PATCH 07/18] arm64: introduce is_a32_task and is_a32_thread (for AArch32 compat) Yury Norov
2016-08-17 11:46 ` Yury Norov [this message]
2016-08-17 11:46 ` [PATCH 09/18] arm64: introduce binfmt_elf32.c Yury Norov
2016-08-17 11:46 ` [PATCH 10/18] arm64: ilp32: introduce binfmt_ilp32.c Yury Norov
2016-08-17 11:46 ` [PATCH 11/18] arm64: ilp32: share aarch32 syscall handlers Yury Norov
2016-08-17 11:46 ` [PATCH 12/18] arm64: ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it Yury Norov
2016-09-02 10:46 ` Bamvor Jian Zhang
2016-09-02 12:55 ` Arnd Bergmann
2016-09-02 13:04 ` Yury Norov
2016-08-17 11:46 ` [PATCH 13/18] arm64: signal: share lp64 signal routines to ilp32 Yury Norov
2016-08-17 11:46 ` [PATCH 14/18] arm64: signal32: move ilp32 and aarch32 common code to separated file Yury Norov
2016-08-17 11:46 ` [PATCH 15/18] arm64: ilp32: introduce ilp32-specific handlers for sigframe and ucontext Yury Norov
2016-08-17 11:46 ` [PATCH 16/18] arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32 Yury Norov
2016-08-17 11:46 ` [PATCH 17/18] arm64:ilp32: add vdso-ilp32 and use for signal return Yury Norov
2016-08-17 13:18 ` Andreas Schwab
2016-08-17 11:46 ` [PATCH 18/18] arm64:ilp32: add ARM64_ILP32 to Kconfig Yury Norov
2016-08-17 12:28 ` [RFC2 nowrap: PATCH v7 00/18] ILP32 for ARM64 Alexander Graf
2016-08-17 12:48 ` Yury Norov
2016-08-17 12:54 ` Dr. Philipp Tomsich
2016-08-17 14:29 ` Catalin Marinas
2016-08-17 14:32 ` Dr. Philipp Tomsich
2016-08-17 15:26 ` Catalin Marinas
2016-08-18 9:45 ` Yury Norov
2016-09-02 10:20 ` Bamvor Jian Zhang
2016-10-21 20:32 [RFC3 " Yury Norov
2016-10-21 20:33 ` [PATCH 08/18] arm64: ilp32: add is_ilp32_compat_{task, thread} and TIF_32BIT_AARCH64 Yury Norov
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