Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 294 insertions, 0 deletions

diff --git a/arch/ia64/ia32/binfmt_elf32.c b/arch/ia64/ia32/binfmt_elf32.c
new file mode 100644
index 00000000000..31de70b7c67
--- /dev/null
+++ b/arch/ia64/ia32/binfmt_elf32.c
@@ -0,0 +1,294 @@
+/*
+ * IA-32 ELF support.
+ *
+ * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
+ * Copyright (C) 2001 Hewlett-Packard Co
+ *	David Mosberger-Tang <davidm@hpl.hp.com>
+ *
+ * 06/16/00	A. Mallick	initialize csd/ssd/tssd/cflg for ia32_load_state
+ * 04/13/01	D. Mosberger	dropped saving tssd in ar.k1---it's not needed
+ * 09/14/01	D. Mosberger	fixed memory management for gdt/tss page
+ */
+#include <linux/config.h>
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/security.h>
+
+#include <asm/param.h>
+#include <asm/signal.h>
+
+#include "ia32priv.h"
+#include "elfcore32.h"
+
+/* Override some function names */
+#undef start_thread
+#define start_thread			ia32_start_thread
+#define elf_format			elf32_format
+#define init_elf_binfmt			init_elf32_binfmt
+#define exit_elf_binfmt			exit_elf32_binfmt
+
+#undef CLOCKS_PER_SEC
+#define CLOCKS_PER_SEC	IA32_CLOCKS_PER_SEC
+
+extern void ia64_elf32_init (struct pt_regs *regs);
+
+static void elf32_set_personality (void);
+
+#define setup_arg_pages(bprm,tos,exec)		ia32_setup_arg_pages(bprm,exec)
+#define elf_map				elf32_map
+
+#undef SET_PERSONALITY
+#define SET_PERSONALITY(ex, ibcs2)	elf32_set_personality()
+
+#define elf_read_implies_exec(ex, have_pt_gnu_stack)	(!(have_pt_gnu_stack))
+
+/* Ugly but avoids duplication */
+#include "../../../fs/binfmt_elf.c"
+
+extern struct page *ia32_shared_page[];
+extern unsigned long *ia32_gdt;
+extern struct page *ia32_gate_page;
+
+struct page *
+ia32_install_shared_page (struct vm_area_struct *vma, unsigned long address, int *type)
+{
+	struct page *pg = ia32_shared_page[smp_processor_id()];
+	get_page(pg);
+	if (type)
+		*type = VM_FAULT_MINOR;
+	return pg;
+}
+
+struct page *
+ia32_install_gate_page (struct vm_area_struct *vma, unsigned long address, int *type)
+{
+	struct page *pg = ia32_gate_page;
+	get_page(pg);
+	if (type)
+		*type = VM_FAULT_MINOR;
+	return pg;
+}
+
+
+static struct vm_operations_struct ia32_shared_page_vm_ops = {
+	.nopage = ia32_install_shared_page
+};
+
+static struct vm_operations_struct ia32_gate_page_vm_ops = {
+	.nopage = ia32_install_gate_page
+};
+
+void
+ia64_elf32_init (struct pt_regs *regs)
+{
+	struct vm_area_struct *vma;
+
+	/*
+	 * Map GDT below 4GB, where the processor can find it.  We need to map
+	 * it with privilege level 3 because the IVE uses non-privileged accesses to these
+	 * tables.  IA-32 segmentation is used to protect against IA-32 accesses to them.
+	 */
+	vma = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL);
+	if (vma) {
+		memset(vma, 0, sizeof(*vma));
+		vma->vm_mm = current->mm;
+		vma->vm_start = IA32_GDT_OFFSET;
+		vma->vm_end = vma->vm_start + PAGE_SIZE;
+		vma->vm_page_prot = PAGE_SHARED;
+		vma->vm_flags = VM_READ|VM_MAYREAD|VM_RESERVED;
+		vma->vm_ops = &ia32_shared_page_vm_ops;
+		down_write(&current->mm->mmap_sem);
+		{
+			if (insert_vm_struct(current->mm, vma)) {
+				kmem_cache_free(vm_area_cachep, vma);
+				up_write(&current->mm->mmap_sem);
+				BUG();
+			}
+		}
+		up_write(&current->mm->mmap_sem);
+	}
+
+	/*
+	 * When user stack is not executable, push sigreturn code to stack makes
+	 * segmentation fault raised when returning to kernel. So now sigreturn
+	 * code is locked in specific gate page, which is pointed by pretcode
+	 * when setup_frame_ia32
+	 */
+	vma = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL);
+	if (vma) {
+		memset(vma, 0, sizeof(*vma));
+		vma->vm_mm = current->mm;
+		vma->vm_start = IA32_GATE_OFFSET;
+		vma->vm_end = vma->vm_start + PAGE_SIZE;
+		vma->vm_page_prot = PAGE_COPY_EXEC;
+		vma->vm_flags = VM_READ | VM_MAYREAD | VM_EXEC
+				| VM_MAYEXEC | VM_RESERVED;
+		vma->vm_ops = &ia32_gate_page_vm_ops;
+		down_write(&current->mm->mmap_sem);
+		{
+			if (insert_vm_struct(current->mm, vma)) {
+				kmem_cache_free(vm_area_cachep, vma);
+				up_write(&current->mm->mmap_sem);
+				BUG();
+			}
+		}
+		up_write(&current->mm->mmap_sem);
+	}
+
+	/*
+	 * Install LDT as anonymous memory.  This gives us all-zero segment descriptors
+	 * until a task modifies them via modify_ldt().
+	 */
+	vma = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL);
+	if (vma) {
+		memset(vma, 0, sizeof(*vma));
+		vma->vm_mm = current->mm;
+		vma->vm_start = IA32_LDT_OFFSET;
+		vma->vm_end = vma->vm_start + PAGE_ALIGN(IA32_LDT_ENTRIES*IA32_LDT_ENTRY_SIZE);
+		vma->vm_page_prot = PAGE_SHARED;
+		vma->vm_flags = VM_READ|VM_WRITE|VM_MAYREAD|VM_MAYWRITE;
+		down_write(&current->mm->mmap_sem);
+		{
+			if (insert_vm_struct(current->mm, vma)) {
+				kmem_cache_free(vm_area_cachep, vma);
+				up_write(&current->mm->mmap_sem);
+				BUG();
+			}
+		}
+		up_write(&current->mm->mmap_sem);
+	}
+
+	ia64_psr(regs)->ac = 0;		/* turn off alignment checking */
+	regs->loadrs = 0;
+	/*
+	 *  According to the ABI %edx points to an `atexit' handler.  Since we don't have
+	 *  one we'll set it to 0 and initialize all the other registers just to make
+	 *  things more deterministic, ala the i386 implementation.
+	 */
+	regs->r8 = 0;	/* %eax */
+	regs->r11 = 0;	/* %ebx */
+	regs->r9 = 0;	/* %ecx */
+	regs->r10 = 0;	/* %edx */
+	regs->r13 = 0;	/* %ebp */
+	regs->r14 = 0;	/* %esi */
+	regs->r15 = 0;	/* %edi */
+
+	current->thread.eflag = IA32_EFLAG;
+	current->thread.fsr = IA32_FSR_DEFAULT;
+	current->thread.fcr = IA32_FCR_DEFAULT;
+	current->thread.fir = 0;
+	current->thread.fdr = 0;
+
+	/*
+	 * Setup GDTD.  Note: GDTD is the descrambled version of the pseudo-descriptor
+	 * format defined by Figure 3-11 "Pseudo-Descriptor Format" in the IA-32
+	 * architecture manual. Also note that the only fields that are not ignored are
+	 * `base', `limit', 'G', `P' (must be 1) and `S' (must be 0).
+	 */
+	regs->r31 = IA32_SEG_UNSCRAMBLE(IA32_SEG_DESCRIPTOR(IA32_GDT_OFFSET, IA32_PAGE_SIZE - 1,
+							    0, 0, 0, 1, 0, 0, 0));
+	/* Setup the segment selectors */
+	regs->r16 = (__USER_DS << 16) | __USER_DS; /* ES == DS, GS, FS are zero */
+	regs->r17 = (__USER_DS << 16) | __USER_CS; /* SS, CS; ia32_load_state() sets TSS and LDT */
+
+	ia32_load_segment_descriptors(current);
+	ia32_load_state(current);
+}
+
+int
+ia32_setup_arg_pages (struct linux_binprm *bprm, int executable_stack)
+{
+	unsigned long stack_base;
+	struct vm_area_struct *mpnt;
+	struct mm_struct *mm = current->mm;
+	int i, ret;
+
+	stack_base = IA32_STACK_TOP - MAX_ARG_PAGES*PAGE_SIZE;
+	mm->arg_start = bprm->p + stack_base;
+
+	bprm->p += stack_base;
+	if (bprm->loader)
+		bprm->loader += stack_base;
+	bprm->exec += stack_base;
+
+	mpnt = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL);
+	if (!mpnt)
+		return -ENOMEM;
+
+	if (security_vm_enough_memory((IA32_STACK_TOP - (PAGE_MASK & (unsigned long) bprm->p))
+				      >> PAGE_SHIFT)) {
+		kmem_cache_free(vm_area_cachep, mpnt);
+		return -ENOMEM;
+	}
+
+	memset(mpnt, 0, sizeof(*mpnt));
+
+	down_write(&current->mm->mmap_sem);
+	{
+		mpnt->vm_mm = current->mm;
+		mpnt->vm_start = PAGE_MASK & (unsigned long) bprm->p;
+		mpnt->vm_end = IA32_STACK_TOP;
+		if (executable_stack == EXSTACK_ENABLE_X)
+			mpnt->vm_flags = VM_STACK_FLAGS |  VM_EXEC;
+		else if (executable_stack == EXSTACK_DISABLE_X)
+			mpnt->vm_flags = VM_STACK_FLAGS & ~VM_EXEC;
+		else
+			mpnt->vm_flags = VM_STACK_FLAGS;
+		mpnt->vm_page_prot = (mpnt->vm_flags & VM_EXEC)?
+					PAGE_COPY_EXEC: PAGE_COPY;
+		if ((ret = insert_vm_struct(current->mm, mpnt))) {
+			up_write(&current->mm->mmap_sem);
+			kmem_cache_free(vm_area_cachep, mpnt);
+			return ret;
+		}
+		current->mm->stack_vm = current->mm->total_vm = vma_pages(mpnt);
+	}
+
+	for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
+		struct page *page = bprm->page[i];
+		if (page) {
+			bprm->page[i] = NULL;
+			install_arg_page(mpnt, page, stack_base);
+		}
+		stack_base += PAGE_SIZE;
+	}
+	up_write(&current->mm->mmap_sem);
+
+	/* Can't do it in ia64_elf32_init(). Needs to be done before calls to
+	   elf32_map() */
+	current->thread.ppl = ia32_init_pp_list();
+
+	return 0;
+}
+
+static void
+elf32_set_personality (void)
+{
+	set_personality(PER_LINUX32);
+	current->thread.map_base  = IA32_PAGE_OFFSET/3;
+	current->thread.task_size = IA32_PAGE_OFFSET;	/* use what Linux/x86 uses... */
+	set_fs(USER_DS);				/* set addr limit for new TASK_SIZE */
+}
+
+static unsigned long
+elf32_map (struct file *filep, unsigned long addr, struct elf_phdr *eppnt, int prot, int type)
+{
+	unsigned long pgoff = (eppnt->p_vaddr) & ~IA32_PAGE_MASK;
+
+	return ia32_do_mmap(filep, (addr & IA32_PAGE_MASK), eppnt->p_filesz + pgoff, prot, type,
+			    eppnt->p_offset - pgoff);
+}
+
+#define cpu_uses_ia32el()	(local_cpu_data->family > 0x1f)
+
+static int __init check_elf32_binfmt(void)
+{
+	if (cpu_uses_ia32el()) {
+		printk("Please use IA-32 EL for executing IA-32 binaries\n");
+		return unregister_binfmt(&elf_format);
+	}
+	return 0;
+}
+
+module_init(check_elf32_binfmt)