Merge branch 'master' into for_paulus

4 files changed, 15 insertions, 116 deletions

diff --git a/arch/x86_64/ia32/ia32_binfmt.c b/arch/x86_64/ia32/ia32_binfmt.c
index 5ce0bd486bb..6efe04f3cbc 100644
--- a/arch/x86_64/ia32/ia32_binfmt.c
+++ b/arch/x86_64/ia32/ia32_binfmt.c
@@ -300,12 +300,10 @@ int ia32_setup_arg_pages(struct linux_binprm *bprm, unsigned long stack_top,
 		bprm->loader += stack_base;
 	bprm->exec += stack_base;
 
-	mpnt = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
+	mpnt = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
 	if (!mpnt) 
 		return -ENOMEM; 
 
-	memset(mpnt, 0, sizeof(*mpnt));
-
 	down_write(&mm->mmap_sem);
 	{
 		mpnt->vm_mm = mm;
diff --git a/arch/x86_64/ia32/ia32entry.S b/arch/x86_64/ia32/ia32entry.S
index b4aa875e175..5f32cf4de5f 100644
--- a/arch/x86_64/ia32/ia32entry.S
+++ b/arch/x86_64/ia32/ia32entry.S
@@ -515,7 +515,7 @@ ia32_sys_call_table:
 	.quad sys32_vm86_warning	/* vm86old */ 
 	.quad compat_sys_wait4
 	.quad sys_swapoff		/* 115 */
-	.quad sys32_sysinfo
+	.quad compat_sys_sysinfo
 	.quad sys32_ipc
 	.quad sys_fsync
 	.quad stub32_sigreturn
diff --git a/arch/x86_64/ia32/sys_ia32.c b/arch/x86_64/ia32/sys_ia32.c
index c9bac3af29d..200fdde18d9 100644
--- a/arch/x86_64/ia32/sys_ia32.c
+++ b/arch/x86_64/ia32/sys_ia32.c
@@ -523,72 +523,6 @@ sys32_sysfs(int option, u32 arg1, u32 arg2)
 	return sys_sysfs(option, arg1, arg2);
 }
 
-struct sysinfo32 {
-        s32 uptime;
-        u32 loads[3];
-        u32 totalram;
-        u32 freeram;
-        u32 sharedram;
-        u32 bufferram;
-        u32 totalswap;
-        u32 freeswap;
-        unsigned short procs;
-	unsigned short pad; 
-        u32 totalhigh;
-        u32 freehigh;
-        u32 mem_unit;
-        char _f[20-2*sizeof(u32)-sizeof(int)];
-};
-
-asmlinkage long
-sys32_sysinfo(struct sysinfo32 __user *info)
-{
-	struct sysinfo s;
-	int ret;
-	mm_segment_t old_fs = get_fs ();
-	int bitcount = 0;
-	
-	set_fs (KERNEL_DS);
-	ret = sys_sysinfo((struct sysinfo __user *)&s);
-	set_fs (old_fs);
-
-        /* Check to see if any memory value is too large for 32-bit and scale
-	 *  down if needed
-	 */
-	if ((s.totalram >> 32) || (s.totalswap >> 32)) {
-		while (s.mem_unit < PAGE_SIZE) {
-			s.mem_unit <<= 1;
-			bitcount++;
-		}
-		s.totalram >>= bitcount;
-		s.freeram >>= bitcount;
-		s.sharedram >>= bitcount;
-		s.bufferram >>= bitcount;
-		s.totalswap >>= bitcount;
-		s.freeswap >>= bitcount;
-		s.totalhigh >>= bitcount;
-		s.freehigh >>= bitcount;
-	}
-
-	if (!access_ok(VERIFY_WRITE, info, sizeof(struct sysinfo32)) ||
-	    __put_user (s.uptime, &info->uptime) ||
-	    __put_user (s.loads[0], &info->loads[0]) ||
-	    __put_user (s.loads[1], &info->loads[1]) ||
-	    __put_user (s.loads[2], &info->loads[2]) ||
-	    __put_user (s.totalram, &info->totalram) ||
-	    __put_user (s.freeram, &info->freeram) ||
-	    __put_user (s.sharedram, &info->sharedram) ||
-	    __put_user (s.bufferram, &info->bufferram) ||
-	    __put_user (s.totalswap, &info->totalswap) ||
-	    __put_user (s.freeswap, &info->freeswap) ||
-	    __put_user (s.procs, &info->procs) ||
-	    __put_user (s.totalhigh, &info->totalhigh) || 
-	    __put_user (s.freehigh, &info->freehigh) ||
-	    __put_user (s.mem_unit, &info->mem_unit))
-		return -EFAULT;
-	return 0;
-}
-                
 asmlinkage long
 sys32_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 {
diff --git a/arch/x86_64/ia32/syscall32.c b/arch/x86_64/ia32/syscall32.c
index 59f1fa15591..568ff0df89e 100644
--- a/arch/x86_64/ia32/syscall32.c
+++ b/arch/x86_64/ia32/syscall32.c
@@ -18,68 +18,34 @@ extern unsigned char syscall32_syscall[], syscall32_syscall_end[];
 extern unsigned char syscall32_sysenter[], syscall32_sysenter_end[];
 extern int sysctl_vsyscall32;
 
-char *syscall32_page; 
+static struct page *syscall32_pages[1];
 static int use_sysenter = -1;
 
-static struct page *
-syscall32_nopage(struct vm_area_struct *vma, unsigned long adr, int *type)
-{
-	struct page *p = virt_to_page(adr - vma->vm_start + syscall32_page);
-	get_page(p);
-	return p;
-}
-
-/* Prevent VMA merging */
-static void syscall32_vma_close(struct vm_area_struct *vma)
-{
-}
-
-static struct vm_operations_struct syscall32_vm_ops = {
-	.close = syscall32_vma_close,
-	.nopage = syscall32_nopage,
-};
-
 struct linux_binprm;
 
 /* Setup a VMA at program startup for the vsyscall page */
 int syscall32_setup_pages(struct linux_binprm *bprm, int exstack)
 {
-	int npages = (VSYSCALL32_END - VSYSCALL32_BASE) >> PAGE_SHIFT;
-	struct vm_area_struct *vma;
 	struct mm_struct *mm = current->mm;
 	int ret;
 
-	vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
-	if (!vma)
-		return -ENOMEM;
-
-	memset(vma, 0, sizeof(struct vm_area_struct));
-	/* Could randomize here */
-	vma->vm_start = VSYSCALL32_BASE;
-	vma->vm_end = VSYSCALL32_END;
-	/* MAYWRITE to allow gdb to COW and set breakpoints */
-	vma->vm_flags = VM_READ|VM_EXEC|VM_MAYREAD|VM_MAYEXEC|VM_MAYWRITE;
+	down_write(&mm->mmap_sem);
 	/*
+	 * MAYWRITE to allow gdb to COW and set breakpoints
+	 *
 	 * Make sure the vDSO gets into every core dump.
 	 * Dumping its contents makes post-mortem fully interpretable later
 	 * without matching up the same kernel and hardware config to see
 	 * what PC values meant.
 	 */
-	vma->vm_flags |= VM_ALWAYSDUMP;
-	vma->vm_flags |= mm->def_flags;
-	vma->vm_page_prot = protection_map[vma->vm_flags & 7];
-	vma->vm_ops = &syscall32_vm_ops;
-	vma->vm_mm = mm;
-
-	down_write(&mm->mmap_sem);
-	if ((ret = insert_vm_struct(mm, vma))) {
-		up_write(&mm->mmap_sem);
-		kmem_cache_free(vm_area_cachep, vma);
-		return ret;
-	}
-	mm->total_vm += npages;
+	/* Could randomize here */
+	ret = install_special_mapping(mm, VSYSCALL32_BASE, PAGE_SIZE,
+				      VM_READ|VM_EXEC|
+				      VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC|
+				      VM_ALWAYSDUMP,
+				      syscall32_pages);
 	up_write(&mm->mmap_sem);
-	return 0;
+	return ret;
 }
 
 const char *arch_vma_name(struct vm_area_struct *vma)
@@ -92,9 +58,10 @@ const char *arch_vma_name(struct vm_area_struct *vma)
 
 static int __init init_syscall32(void)
 { 
-	syscall32_page = (void *)get_zeroed_page(GFP_KERNEL); 
+	char *syscall32_page = (void *)get_zeroed_page(GFP_KERNEL);
 	if (!syscall32_page) 
 		panic("Cannot allocate syscall32 page"); 
+	syscall32_pages[0] = virt_to_page(syscall32_page);
  	if (use_sysenter > 0) {
  		memcpy(syscall32_page, syscall32_sysenter,
  		       syscall32_sysenter_end - syscall32_sysenter);