x86: tls32 moved

This renames arch/x86/ia32/tls32.c to arch/x86/kernel/tls.c, which does
nothing now but paves the way to consolidate this code for 32-bit too.

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Zachary Amsden <zach@vmware.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/ia32/Makefile b/arch/x86/ia32/Makefile
index 8c19b763b2fbe187f40ffd729ac1b6b07f2ba3d0..ea608864084733699425f8c763f937dfa566f9af 100644 (file)
--- a/arch/x86/ia32/Makefile
+++ b/arch/x86/ia32/Makefile
@@ -2,7 +2,7 @@
 # Makefile for the ia32 kernel emulation subsystem.
 #
 
-obj-$(CONFIG_IA32_EMULATION) := ia32entry.o sys_ia32.o ia32_signal.o tls32.o \
+obj-$(CONFIG_IA32_EMULATION) := ia32entry.o sys_ia32.o ia32_signal.o \
        ia32_binfmt.o fpu32.o ptrace32.o
 
 sysv-$(CONFIG_SYSVIPC) := ipc32.o

diff --git a/arch/x86/ia32/tls32.c b/arch/x86/ia32/tls32.c
deleted file mode 100644 (file)
index cac4b26..0000000
--- a/arch/x86/ia32/tls32.c
+++ /dev/null
@@ -1,158 +0,0 @@
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/user.h>
-
-#include <asm/uaccess.h>
-#include <asm/desc.h>
-#include <asm/system.h>
-#include <asm/ldt.h>
-#include <asm/processor.h>
-#include <asm/proto.h>
-
-/*
- * sys_alloc_thread_area: get a yet unused TLS descriptor index.
- */
-static int get_free_idx(void)
-{
-       struct thread_struct *t = &current->thread;
-       int idx;
-
-       for (idx = 0; idx < GDT_ENTRY_TLS_ENTRIES; idx++)
-               if (desc_empty((struct n_desc_struct *)(t->tls_array) + idx))
-                       return idx + GDT_ENTRY_TLS_MIN;
-       return -ESRCH;
-}
-
-/*
- * Set a given TLS descriptor:
- * When you want addresses > 32bit use arch_prctl() 
- */
-int do_set_thread_area(struct thread_struct *t, struct user_desc __user *u_info)
-{
-       struct user_desc info;
-       struct n_desc_struct *desc;
-       int cpu, idx;
-
-       if (copy_from_user(&info, u_info, sizeof(info)))
-               return -EFAULT;
-
-       idx = info.entry_number;
-
-       /*
-        * index -1 means the kernel should try to find and
-        * allocate an empty descriptor:
-        */
-       if (idx == -1) {
-               idx = get_free_idx();
-               if (idx < 0)
-                       return idx;
-               if (put_user(idx, &u_info->entry_number))
-                       return -EFAULT;
-       }
-
-       if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
-               return -EINVAL;
-
-       desc = ((struct n_desc_struct *)t->tls_array) + idx - GDT_ENTRY_TLS_MIN;
-
-       /*
-        * We must not get preempted while modifying the TLS.
-        */
-       cpu = get_cpu();
-
-       if (LDT_empty(&info)) {
-               desc->a = 0;
-               desc->b = 0;
-       } else {
-               desc->a = LDT_entry_a(&info);
-               desc->b = LDT_entry_b(&info);
-       }
-       if (t == &current->thread)
-               load_TLS(t, cpu);
-
-       put_cpu();
-       return 0;
-}
-
-asmlinkage long sys32_set_thread_area(struct user_desc __user *u_info)
-{ 
-       return do_set_thread_area(&current->thread, u_info); 
-} 
-
-
-/*
- * Get the current Thread-Local Storage area:
- */
-
-#define GET_LIMIT(desc) ( \
-       ((desc)->a & 0x0ffff) | \
-        ((desc)->b & 0xf0000) )
-       
-#define GET_32BIT(desc)                (((desc)->b >> 22) & 1)
-#define GET_CONTENTS(desc)     (((desc)->b >> 10) & 3)
-#define GET_WRITABLE(desc)     (((desc)->b >>  9) & 1)
-#define GET_LIMIT_PAGES(desc)  (((desc)->b >> 23) & 1)
-#define GET_PRESENT(desc)      (((desc)->b >> 15) & 1)
-#define GET_USEABLE(desc)      (((desc)->b >> 20) & 1)
-#define GET_LONGMODE(desc)     (((desc)->b >> 21) & 1)
-
-int do_get_thread_area(struct thread_struct *t, struct user_desc __user *u_info)
-{
-       struct user_desc info;
-       struct n_desc_struct *desc;
-       int idx;
-
-       if (get_user(idx, &u_info->entry_number))
-               return -EFAULT;
-       if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
-               return -EINVAL;
-
-       desc = ((struct n_desc_struct *)t->tls_array) + idx - GDT_ENTRY_TLS_MIN;
-
-       memset(&info, 0, sizeof(struct user_desc));
-       info.entry_number = idx;
-       info.base_addr = get_desc_base(desc);
-       info.limit = GET_LIMIT(desc);
-       info.seg_32bit = GET_32BIT(desc);
-       info.contents = GET_CONTENTS(desc);
-       info.read_exec_only = !GET_WRITABLE(desc);
-       info.limit_in_pages = GET_LIMIT_PAGES(desc);
-       info.seg_not_present = !GET_PRESENT(desc);
-       info.useable = GET_USEABLE(desc);
-       info.lm = GET_LONGMODE(desc);
-
-       if (copy_to_user(u_info, &info, sizeof(info)))
-               return -EFAULT;
-       return 0;
-}
-
-asmlinkage long sys32_get_thread_area(struct user_desc __user *u_info)
-{
-       return do_get_thread_area(&current->thread, u_info);
-} 
-
-
-int ia32_child_tls(struct task_struct *p, struct pt_regs *childregs)
-{
-       struct n_desc_struct *desc;
-       struct user_desc info;
-       struct user_desc __user *cp;
-       int idx;
-       
-       cp = (void __user *)childregs->rsi;
-       if (copy_from_user(&info, cp, sizeof(info)))
-               return -EFAULT;
-       if (LDT_empty(&info))
-               return -EINVAL;
-       
-       idx = info.entry_number;
-       if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
-               return -EINVAL;
-       
-       desc = (struct n_desc_struct *)(p->thread.tls_array) + idx - GDT_ENTRY_TLS_MIN;
-       desc->a = LDT_entry_a(&info);
-       desc->b = LDT_entry_b(&info);
-
-       return 0;
-}

diff --git a/arch/x86/kernel/Makefile_64 b/arch/x86/kernel/Makefile_64
index ae95d21ea885667871d8ed62d867d95b0a861e6c..e1ba82e582a871c71d68eea016598e84af862277 100644 (file)
--- a/arch/x86/kernel/Makefile_64
+++ b/arch/x86/kernel/Makefile_64
@@ -13,6 +13,7 @@ obj-y := process_64.o signal_64.o entry_64.o traps_64.o irq_64.o \
                pci-dma_64.o pci-nommu_64.o alternative.o hpet.o tsc_64.o bugs_64.o \
                i8253.o io_delay.o rtc.o
 
+obj-$(CONFIG_IA32_EMULATION)   += tls.o
 obj-$(CONFIG_STACKTRACE)       += stacktrace.o
 obj-y                          += cpu/
 obj-y                          += acpi/

diff --git a/arch/x86/kernel/tls.c b/arch/x86/kernel/tls.c
new file mode 100644 (file)
index 0000000..5291596
--- /dev/null
+++ b/arch/x86/kernel/tls.c
@@ -0,0 +1,158 @@
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/user.h>
+
+#include <asm/uaccess.h>
+#include <asm/desc.h>
+#include <asm/system.h>
+#include <asm/ldt.h>
+#include <asm/processor.h>
+#include <asm/proto.h>
+
+/*
+ * sys_alloc_thread_area: get a yet unused TLS descriptor index.
+ */
+static int get_free_idx(void)
+{
+       struct thread_struct *t = &current->thread;
+       int idx;
+
+       for (idx = 0; idx < GDT_ENTRY_TLS_ENTRIES; idx++)
+               if (desc_empty((struct n_desc_struct *)(t->tls_array) + idx))
+                       return idx + GDT_ENTRY_TLS_MIN;
+       return -ESRCH;
+}
+
+/*
+ * Set a given TLS descriptor:
+ * When you want addresses > 32bit use arch_prctl()
+ */
+int do_set_thread_area(struct thread_struct *t, struct user_desc __user *u_info)
+{
+       struct user_desc info;
+       struct n_desc_struct *desc;
+       int cpu, idx;
+
+       if (copy_from_user(&info, u_info, sizeof(info)))
+               return -EFAULT;
+
+       idx = info.entry_number;
+
+       /*
+        * index -1 means the kernel should try to find and
+        * allocate an empty descriptor:
+        */
+       if (idx == -1) {
+               idx = get_free_idx();
+               if (idx < 0)
+                       return idx;
+               if (put_user(idx, &u_info->entry_number))
+                       return -EFAULT;
+       }
+
+       if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
+               return -EINVAL;
+
+       desc = ((struct n_desc_struct *)t->tls_array) + idx - GDT_ENTRY_TLS_MIN;
+
+       /*
+        * We must not get preempted while modifying the TLS.
+        */
+       cpu = get_cpu();
+
+       if (LDT_empty(&info)) {
+               desc->a = 0;
+               desc->b = 0;
+       } else {
+               desc->a = LDT_entry_a(&info);
+               desc->b = LDT_entry_b(&info);
+       }
+       if (t == &current->thread)
+               load_TLS(t, cpu);
+
+       put_cpu();
+       return 0;
+}
+
+asmlinkage long sys32_set_thread_area(struct user_desc __user *u_info)
+{
+       return do_set_thread_area(&current->thread, u_info);
+}
+
+
+/*
+ * Get the current Thread-Local Storage area:
+ */
+
+#define GET_LIMIT(desc) ( \
+       ((desc)->a & 0x0ffff) | \
+        ((desc)->b & 0xf0000) )
+
+#define GET_32BIT(desc)                (((desc)->b >> 22) & 1)
+#define GET_CONTENTS(desc)     (((desc)->b >> 10) & 3)
+#define GET_WRITABLE(desc)     (((desc)->b >>  9) & 1)
+#define GET_LIMIT_PAGES(desc)  (((desc)->b >> 23) & 1)
+#define GET_PRESENT(desc)      (((desc)->b >> 15) & 1)
+#define GET_USEABLE(desc)      (((desc)->b >> 20) & 1)
+#define GET_LONGMODE(desc)     (((desc)->b >> 21) & 1)
+
+int do_get_thread_area(struct thread_struct *t, struct user_desc __user *u_info)
+{
+       struct user_desc info;
+       struct n_desc_struct *desc;
+       int idx;
+
+       if (get_user(idx, &u_info->entry_number))
+               return -EFAULT;
+       if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
+               return -EINVAL;
+
+       desc = ((struct n_desc_struct *)t->tls_array) + idx - GDT_ENTRY_TLS_MIN;
+
+       memset(&info, 0, sizeof(struct user_desc));
+       info.entry_number = idx;
+       info.base_addr = get_desc_base(desc);
+       info.limit = GET_LIMIT(desc);
+       info.seg_32bit = GET_32BIT(desc);
+       info.contents = GET_CONTENTS(desc);
+       info.read_exec_only = !GET_WRITABLE(desc);
+       info.limit_in_pages = GET_LIMIT_PAGES(desc);
+       info.seg_not_present = !GET_PRESENT(desc);
+       info.useable = GET_USEABLE(desc);
+       info.lm = GET_LONGMODE(desc);
+
+       if (copy_to_user(u_info, &info, sizeof(info)))
+               return -EFAULT;
+       return 0;
+}
+
+asmlinkage long sys32_get_thread_area(struct user_desc __user *u_info)
+{
+       return do_get_thread_area(&current->thread, u_info);
+}
+
+
+int ia32_child_tls(struct task_struct *p, struct pt_regs *childregs)
+{
+       struct n_desc_struct *desc;
+       struct user_desc info;
+       struct user_desc __user *cp;
+       int idx;
+
+       cp = (void __user *)childregs->rsi;
+       if (copy_from_user(&info, cp, sizeof(info)))
+               return -EFAULT;
+       if (LDT_empty(&info))
+               return -EINVAL;
+
+       idx = info.entry_number;
+       if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
+               return -EINVAL;
+
+       desc = (struct n_desc_struct *)(p->thread.tls_array) + idx - GDT_ENTRY_TLS_MIN;
+       desc->a = LDT_entry_a(&info);
+       desc->b = LDT_entry_b(&info);
+
+       return 0;
+}