From: sxwjean@me.com
To: x86@kernel.org, linux-mm@kvack.org
Cc: sxwjean@me.com, Xiongwei Song <sxwjean@gmail.com>
Subject: [PATCH 1/2] x86: Rename TIF_ADDR32 to TIF_32BIT
Date: Tue, 21 Sep 2021 19:02:51 +0800 [thread overview]
Message-ID: <20210921110252.2593542-2-sxwjean@me.com> (raw)
In-Reply-To: <20210921110252.2593542-1-sxwjean@me.com>
From: Xiongwei Song <sxwjean@gmail.com>
In arm64 or powerpc or sparc, the 32 bits process in 64 bits kernel is set
flag TIF_32BIT. However in x86, that flag name is TIF_ADDR32. This patch
makes the flag name in x86 same as other archs.
Signed-off-by: Xiongwei Song <sxwjean@gmail.com>
---
arch/x86/include/asm/elf.h | 2 +-
arch/x86/include/asm/page_64_types.h | 6 +++---
arch/x86/include/asm/thread_info.h | 4 ++--
arch/x86/kernel/process_64.c | 4 ++--
4 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h
index 29fea180a665..aa6ae2bc20bd 100644
--- a/arch/x86/include/asm/elf.h
+++ b/arch/x86/include/asm/elf.h
@@ -322,7 +322,7 @@ static inline int mmap_is_ia32(void)
{
return IS_ENABLED(CONFIG_X86_32) ||
(IS_ENABLED(CONFIG_COMPAT) &&
- test_thread_flag(TIF_ADDR32));
+ test_thread_flag(TIF_32BIT));
}
extern unsigned long task_size_32bit(void);
diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h
index a8d4ad856568..f4631bee9119 100644
--- a/arch/x86/include/asm/page_64_types.h
+++ b/arch/x86/include/asm/page_64_types.h
@@ -70,11 +70,11 @@
#define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \
0xc0000000 : 0xFFFFe000)
-#define TASK_SIZE_LOW (test_thread_flag(TIF_ADDR32) ? \
+#define TASK_SIZE_LOW (test_thread_flag(TIF_32BIT) ? \
IA32_PAGE_OFFSET : DEFAULT_MAP_WINDOW)
-#define TASK_SIZE (test_thread_flag(TIF_ADDR32) ? \
+#define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \
IA32_PAGE_OFFSET : TASK_SIZE_MAX)
-#define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_ADDR32)) ? \
+#define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_32BIT)) ? \
IA32_PAGE_OFFSET : TASK_SIZE_MAX)
#define STACK_TOP TASK_SIZE_LOW
diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h
index cf132663c219..9e768e7714cc 100644
--- a/arch/x86/include/asm/thread_info.h
+++ b/arch/x86/include/asm/thread_info.h
@@ -97,7 +97,7 @@ struct thread_info {
#define TIF_FORCED_TF 24 /* true if TF in eflags artificially */
#define TIF_BLOCKSTEP 25 /* set when we want DEBUGCTLMSR_BTF */
#define TIF_LAZY_MMU_UPDATES 27 /* task is updating the mmu lazily */
-#define TIF_ADDR32 29 /* 32-bit address space on 64 bits */
+#define TIF_32BIT 29 /* 32-bit address space on 64 bits */
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
@@ -120,7 +120,7 @@ struct thread_info {
#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
#define _TIF_BLOCKSTEP (1 << TIF_BLOCKSTEP)
#define _TIF_LAZY_MMU_UPDATES (1 << TIF_LAZY_MMU_UPDATES)
-#define _TIF_ADDR32 (1 << TIF_ADDR32)
+#define _TIF_32BIT (1 << TIF_32BIT)
/* flags to check in __switch_to() */
#define _TIF_WORK_CTXSW_BASE \
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index ec0d836a13b1..a8a94f87548f 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -666,7 +666,7 @@ void set_personality_64bit(void)
/* inherit personality from parent */
/* Make sure to be in 64bit mode */
- clear_thread_flag(TIF_ADDR32);
+ clear_thread_flag(TIF_32BIT);
/* Pretend that this comes from a 64bit execve */
task_pt_regs(current)->orig_ax = __NR_execve;
current_thread_info()->status &= ~TS_COMPAT;
@@ -721,7 +721,7 @@ static void __set_personality_ia32(void)
void set_personality_ia32(bool x32)
{
/* Make sure to be in 32bit mode */
- set_thread_flag(TIF_ADDR32);
+ set_thread_flag(TIF_32BIT);
if (x32)
__set_personality_x32();
--
2.30.2
next prev parent reply other threads:[~2021-09-21 11:04 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-21 11:02 [PATCH 0/2] Use generic code for virtual address of randomization of x86 sxwjean
2021-09-21 11:02 ` sxwjean [this message]
2021-09-21 11:50 ` [PATCH 1/2] x86: Rename TIF_ADDR32 to TIF_32BIT Peter Zijlstra
2021-09-21 14:13 ` Xiongwei Song
2021-09-21 11:02 ` [PATCH 2/2] x86/mm: Randomize va with generic arch_pick_mmap_layout() sxwjean
2021-09-21 12:02 ` Peter Zijlstra
2021-09-21 13:24 ` [PATCH 0/2] Use generic code for virtual address of randomization of x86 Kees Cook
2021-09-21 14:11 ` Xiongwei Song
2021-09-21 14:19 ` Peter Zijlstra
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