add idl4k kernel firmware version 1.13.0.105

kernel/arch/ia64/ia32/Makefile

@@ -0,0 +1,11 @@
+#
+# Makefile for the ia32 kernel emulation subsystem.
+#
+
+obj-y := ia32_entry.o sys_ia32.o ia32_signal.o \
+	 ia32_support.o ia32_traps.o binfmt_elf32.o ia32_ldt.o
+obj-$(CONFIG_AUDIT) += audit.o
+
+# Don't let GCC uses f16-f31 so that save_ia32_fpstate_live() and
+# restore_ia32_fpstate_live() can be sure the live register contain user-level state.
+CFLAGS_ia32_signal.o += -mfixed-range=f16-f31

kernel/arch/ia64/ia32/audit.c

@@ -0,0 +1,42 @@
+#include "../../x86/include/asm/unistd_32.h"
+
+unsigned ia32_dir_class[] = {
+#include <asm-generic/audit_dir_write.h>
+~0U
+};
+
+unsigned ia32_chattr_class[] = {
+#include <asm-generic/audit_change_attr.h>
+~0U
+};
+
+unsigned ia32_write_class[] = {
+#include <asm-generic/audit_write.h>
+~0U
+};
+
+unsigned ia32_read_class[] = {
+#include <asm-generic/audit_read.h>
+~0U
+};
+
+unsigned ia32_signal_class[] = {
+#include <asm-generic/audit_signal.h>
+~0U
+};
+
+int ia32_classify_syscall(unsigned syscall)
+{
+	switch(syscall) {
+	case __NR_open:
+		return 2;
+	case __NR_openat:
+		return 3;
+	case __NR_socketcall:
+		return 4;
+	case __NR_execve:
+		return 5;
+	default:
+		return 1;
+	}
+}

kernel/arch/ia64/ia32/binfmt_elf32.c

@@ -0,0 +1,245 @@
+/*
+ * 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/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);
+
+static unsigned long __attribute ((unused))
+randomize_stack_top(unsigned long stack_top);
+
+#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)	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;
+
+int
+ia32_install_shared_page (struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+	vmf->page = ia32_shared_page[smp_processor_id()];
+	get_page(vmf->page);
+	return 0;
+}
+
+int
+ia32_install_gate_page (struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+	vmf->page = ia32_gate_page;
+	get_page(vmf->page);
+	return 0;
+}
+
+
+static const struct vm_operations_struct ia32_shared_page_vm_ops = {
+	.fault = ia32_install_shared_page
+};
+
+static const struct vm_operations_struct ia32_gate_page_vm_ops = {
+	.fault = 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_zalloc(vm_area_cachep, GFP_KERNEL);
+	if (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_zalloc(vm_area_cachep, GFP_KERNEL);
+	if (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_zalloc(vm_area_cachep, GFP_KERNEL);
+	if (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);
+}
+
+/*
+ * Undo the override of setup_arg_pages() without this ia32_setup_arg_pages()
+ * will suffer infinite self recursion.
+ */
+#undef setup_arg_pages
+
+int
+ia32_setup_arg_pages (struct linux_binprm *bprm, int executable_stack)
+{
+	int ret;
+
+	ret = setup_arg_pages(bprm, IA32_STACK_TOP, executable_stack);
+	if (!ret) {
+		/*
+		 * 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 ret;
+}
+
+static void
+elf32_set_personality (void)
+{
+	set_personality(PER_LINUX32);
+	current->thread.map_base  = IA32_PAGE_OFFSET/3;
+}
+
+static unsigned long
+elf32_map(struct file *filep, unsigned long addr, struct elf_phdr *eppnt,
+		int prot, int type, unsigned long unused)
+{
+	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");
+		unregister_binfmt(&elf_format);
+	}
+	return 0;
+}
+
+module_init(check_elf32_binfmt)

kernel/arch/ia64/ia32/elfcore32.h

@@ -0,0 +1,150 @@
+/*
+ * IA-32 ELF core dump support.
+ *
+ * Copyright (C) 2003 Arun Sharma <arun.sharma@intel.com>
+ *
+ * Derived from the x86_64 version
+ */
+#ifndef _ELFCORE32_H_
+#define _ELFCORE32_H_
+
+#include <asm/intrinsics.h>
+#include <asm/uaccess.h>
+
+#define USE_ELF_CORE_DUMP 1
+
+/* Override elfcore.h */
+#define _LINUX_ELFCORE_H 1
+typedef unsigned int elf_greg_t;
+
+#define ELF_NGREG (sizeof (struct user_regs_struct32) / sizeof(elf_greg_t))
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+typedef struct ia32_user_i387_struct elf_fpregset_t;
+typedef struct ia32_user_fxsr_struct elf_fpxregset_t;
+
+struct elf_siginfo
+{
+	int	si_signo;			/* signal number */
+	int	si_code;			/* extra code */
+	int	si_errno;			/* errno */
+};
+
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+/*
+ * Hacks are here since types between compat_timeval (= pair of s32) and
+ * ia64-native timeval (= pair of s64) are not compatible, at least a file
+ * arch/ia64/ia32/../../../fs/binfmt_elf.c will get warnings from compiler on
+ * use of cputime_to_timeval(), which usually an alias of jiffies_to_timeval().
+ */
+#define cputime_to_timeval(a,b) \
+	do { (b)->tv_usec = 0; (b)->tv_sec = (a)/NSEC_PER_SEC; } while(0)
+#else
+#define jiffies_to_timeval(a,b) \
+	do { (b)->tv_usec = 0; (b)->tv_sec = (a)/HZ; } while(0)
+#endif
+
+struct elf_prstatus
+{
+	struct elf_siginfo pr_info;	/* Info associated with signal */
+	short	pr_cursig;		/* Current signal */
+	unsigned int pr_sigpend;	/* Set of pending signals */
+	unsigned int pr_sighold;	/* Set of held signals */
+	pid_t	pr_pid;
+	pid_t	pr_ppid;
+	pid_t	pr_pgrp;
+	pid_t	pr_sid;
+	struct compat_timeval pr_utime;	/* User time */
+	struct compat_timeval pr_stime;	/* System time */
+	struct compat_timeval pr_cutime;	/* Cumulative user time */
+	struct compat_timeval pr_cstime;	/* Cumulative system time */
+	elf_gregset_t pr_reg;	/* GP registers */
+	int pr_fpvalid;		/* True if math co-processor being used.  */
+};
+
+#define ELF_PRARGSZ	(80)	/* Number of chars for args */
+
+struct elf_prpsinfo
+{
+	char	pr_state;	/* numeric process state */
+	char	pr_sname;	/* char for pr_state */
+	char	pr_zomb;	/* zombie */
+	char	pr_nice;	/* nice val */
+	unsigned int pr_flag;	/* flags */
+	__u16	pr_uid;
+	__u16	pr_gid;
+	pid_t	pr_pid, pr_ppid, pr_pgrp, pr_sid;
+	/* Lots missing */
+	char	pr_fname[16];	/* filename of executable */
+	char	pr_psargs[ELF_PRARGSZ];	/* initial part of arg list */
+};
+
+#define ELF_CORE_COPY_REGS(pr_reg, regs)       		\
+	pr_reg[0] = regs->r11;				\
+	pr_reg[1] = regs->r9;				\
+	pr_reg[2] = regs->r10;				\
+	pr_reg[3] = regs->r14;				\
+	pr_reg[4] = regs->r15;				\
+	pr_reg[5] = regs->r13;				\
+	pr_reg[6] = regs->r8;				\
+	pr_reg[7] = regs->r16 & 0xffff;			\
+	pr_reg[8] = (regs->r16 >> 16) & 0xffff;		\
+	pr_reg[9] = (regs->r16 >> 32) & 0xffff;		\
+	pr_reg[10] = (regs->r16 >> 48) & 0xffff;	\
+	pr_reg[11] = regs->r1; 				\
+	pr_reg[12] = regs->cr_iip;			\
+	pr_reg[13] = regs->r17 & 0xffff;		\
+	pr_reg[14] = ia64_getreg(_IA64_REG_AR_EFLAG);	\
+	pr_reg[15] = regs->r12;				\
+	pr_reg[16] = (regs->r17 >> 16) & 0xffff;
+
+static inline void elf_core_copy_regs(elf_gregset_t *elfregs,
+				      struct pt_regs *regs)
+{
+	ELF_CORE_COPY_REGS((*elfregs), regs)
+}
+
+static inline int elf_core_copy_task_regs(struct task_struct *t,
+					  elf_gregset_t* elfregs)
+{
+	ELF_CORE_COPY_REGS((*elfregs), task_pt_regs(t));
+	return 1;
+}
+
+static inline int
+elf_core_copy_task_fpregs(struct task_struct *tsk, struct pt_regs *regs, elf_fpregset_t *fpu)
+{
+	struct ia32_user_i387_struct *fpstate = (void*)fpu;
+	mm_segment_t old_fs;
+
+	if (!tsk_used_math(tsk))
+		return 0;
+	
+	old_fs = get_fs();
+	set_fs(KERNEL_DS);
+	save_ia32_fpstate(tsk, (struct ia32_user_i387_struct __user *) fpstate);
+	set_fs(old_fs);
+
+	return 1;
+}
+
+#define ELF_CORE_COPY_XFPREGS 1
+#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG
+static inline int
+elf_core_copy_task_xfpregs(struct task_struct *tsk, elf_fpxregset_t *xfpu)
+{
+	struct ia32_user_fxsr_struct *fpxstate = (void*) xfpu;
+	mm_segment_t old_fs;
+
+	if (!tsk_used_math(tsk))
+		return 0;
+
+	old_fs = get_fs();
+	set_fs(KERNEL_DS);
+	save_ia32_fpxstate(tsk, (struct ia32_user_fxsr_struct __user *) fpxstate);
+	set_fs(old_fs);
+
+	return 1;
+}
+
+#endif /* _ELFCORE32_H_ */

kernel/arch/ia64/ia32/ia32_entry.S

@@ -0,0 +1,468 @@
+#include <asm/asmmacro.h>
+#include <asm/ia32.h>
+#include <asm/asm-offsets.h>
+#include <asm/signal.h>
+#include <asm/thread_info.h>
+
+#include "../kernel/minstate.h"
+
+	/*
+	 * execve() is special because in case of success, we need to
+	 * setup a null register window frame (in case an IA-32 process
+	 * is exec'ing an IA-64 program).
+	 */
+ENTRY(ia32_execve)
+	.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(3)
+	alloc loc1=ar.pfs,3,2,4,0
+	mov loc0=rp
+	.body
+	zxt4 out0=in0			// filename
+	;;				// stop bit between alloc and call
+	zxt4 out1=in1			// argv
+	zxt4 out2=in2			// envp
+	add out3=16,sp			// regs
+	br.call.sptk.few rp=sys32_execve
+1:	cmp.ge p6,p0=r8,r0
+	mov ar.pfs=loc1			// restore ar.pfs
+	;;
+(p6)	mov ar.pfs=r0			// clear ar.pfs in case of success
+	sxt4 r8=r8			// return 64-bit result
+	mov rp=loc0
+	br.ret.sptk.few rp
+END(ia32_execve)
+
+ENTRY(ia32_clone)
+	.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(5)
+	alloc r16=ar.pfs,5,2,6,0
+	DO_SAVE_SWITCH_STACK
+	mov loc0=rp
+	mov loc1=r16				// save ar.pfs across do_fork
+	.body
+	zxt4 out1=in1				// newsp
+	mov out3=16				// stacksize (compensates for 16-byte scratch area)
+	adds out2=IA64_SWITCH_STACK_SIZE+16,sp	// out2 = &regs
+	mov out0=in0				// out0 = clone_flags
+	zxt4 out4=in2				// out4 = parent_tidptr
+	zxt4 out5=in4				// out5 = child_tidptr
+	br.call.sptk.many rp=do_fork
+.ret0:	.restore sp
+	adds sp=IA64_SWITCH_STACK_SIZE,sp	// pop the switch stack
+	mov ar.pfs=loc1
+	mov rp=loc0
+	br.ret.sptk.many rp
+END(ia32_clone)
+
+GLOBAL_ENTRY(ia32_ret_from_clone)
+	PT_REGS_UNWIND_INFO(0)
+{	/*
+	 * Some versions of gas generate bad unwind info if the first instruction of a
+	 * procedure doesn't go into the first slot of a bundle.  This is a workaround.
+	 */
+	nop.m 0
+	nop.i 0
+	/*
+	 * We need to call schedule_tail() to complete the scheduling process.
+	 * Called by ia64_switch_to after do_fork()->copy_thread().  r8 contains the
+	 * address of the previously executing task.
+	 */
+	br.call.sptk.many rp=ia64_invoke_schedule_tail
+}
+.ret1:
+	adds r2=TI_FLAGS+IA64_TASK_SIZE,r13
+	;;
+	ld4 r2=[r2]
+	;;
+	mov r8=0
+	and r2=_TIF_SYSCALL_TRACEAUDIT,r2
+	;;
+	cmp.ne p6,p0=r2,r0
+(p6)	br.cond.spnt .ia32_strace_check_retval
+	;;					// prevent RAW on r8
+END(ia32_ret_from_clone)
+	// fall thrugh
+GLOBAL_ENTRY(ia32_ret_from_syscall)
+	PT_REGS_UNWIND_INFO(0)
+
+	cmp.ge p6,p7=r8,r0                      // syscall executed successfully?
+	adds r2=IA64_PT_REGS_R8_OFFSET+16,sp    // r2 = &pt_regs.r8
+	;;
+	alloc r3=ar.pfs,0,0,0,0			// drop the syscall argument frame
+	st8 [r2]=r8                             // store return value in slot for r8
+	br.cond.sptk.many ia64_leave_kernel
+END(ia32_ret_from_syscall)
+
+	//
+	// Invoke a system call, but do some tracing before and after the call.
+	// We MUST preserve the current register frame throughout this routine
+	// because some system calls (such as ia64_execve) directly
+	// manipulate ar.pfs.
+	//
+	// Input:
+	//	r8 = syscall number
+	//	b6 = syscall entry point
+	//
+GLOBAL_ENTRY(ia32_trace_syscall)
+	PT_REGS_UNWIND_INFO(0)
+	mov r3=-38
+	adds r2=IA64_PT_REGS_R8_OFFSET+16,sp
+	;;
+	st8 [r2]=r3				// initialize return code to -ENOSYS
+	br.call.sptk.few rp=syscall_trace_enter	// give parent a chance to catch syscall args
+	cmp.lt p6,p0=r8,r0			// check tracehook
+	adds r2=IA64_PT_REGS_R8_OFFSET+16,sp	// r2 = &pt_regs.r8
+	;;
+(p6)	st8.spill [r2]=r8			// store return value in slot for r8
+(p6)	br.spnt.few .ret4
+.ret2:	// Need to reload arguments (they may be changed by the tracing process)
+	adds r2=IA64_PT_REGS_R1_OFFSET+16,sp	// r2 = &pt_regs.r1
+	adds r3=IA64_PT_REGS_R13_OFFSET+16,sp	// r3 = &pt_regs.r13
+	mov r15=IA32_NR_syscalls
+	;;
+	ld4 r8=[r2],IA64_PT_REGS_R9_OFFSET-IA64_PT_REGS_R1_OFFSET
+	movl r16=ia32_syscall_table
+	;;
+	ld4 r33=[r2],8				// r9 == ecx
+	ld4 r37=[r3],16				// r13 == ebp
+	cmp.ltu.unc p6,p7=r8,r15
+	;;
+	ld4 r34=[r2],8				// r10 == edx
+	ld4 r36=[r3],8				// r15 == edi
+(p6)	shladd r16=r8,3,r16	// force ni_syscall if not valid syscall number
+	;;
+	ld8 r16=[r16]
+	;;
+	ld4 r32=[r2],8				// r11 == ebx
+	mov b6=r16
+	ld4 r35=[r3],8				// r14 == esi
+	br.call.sptk.few rp=b6			// do the syscall
+.ia32_strace_check_retval:
+	cmp.lt p6,p0=r8,r0			// syscall failed?
+	adds r2=IA64_PT_REGS_R8_OFFSET+16,sp	// r2 = &pt_regs.r8
+	;;
+	st8.spill [r2]=r8			// store return value in slot for r8
+	br.call.sptk.few rp=syscall_trace_leave	// give parent a chance to catch return value
+.ret4:	alloc r2=ar.pfs,0,0,0,0			// drop the syscall argument frame
+	br.cond.sptk.many ia64_leave_kernel
+END(ia32_trace_syscall)
+
+GLOBAL_ENTRY(sys32_vfork)
+	alloc r16=ar.pfs,2,2,4,0;;
+	mov out0=IA64_CLONE_VFORK|IA64_CLONE_VM|SIGCHLD	// out0 = clone_flags
+	br.cond.sptk.few .fork1			// do the work
+END(sys32_vfork)
+
+GLOBAL_ENTRY(sys32_fork)
+	.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(2)
+	alloc r16=ar.pfs,2,2,4,0
+	mov out0=SIGCHLD			// out0 = clone_flags
+	;;
+.fork1:
+	mov loc0=rp
+	mov loc1=r16				// save ar.pfs across do_fork
+	DO_SAVE_SWITCH_STACK
+
+	.body
+
+	mov out1=0
+	mov out3=0
+	adds out2=IA64_SWITCH_STACK_SIZE+16,sp	// out2 = &regs
+	br.call.sptk.few rp=do_fork
+.ret5:	.restore sp
+	adds sp=IA64_SWITCH_STACK_SIZE,sp	// pop the switch stack
+	mov ar.pfs=loc1
+	mov rp=loc0
+	br.ret.sptk.many rp
+END(sys32_fork)
+
+	.rodata
+	.align 8
+	.globl ia32_syscall_table
+ia32_syscall_table:
+	data8 sys_ni_syscall	  /* 0	-  old "setup(" system call*/
+	data8 sys_exit
+	data8 sys32_fork
+	data8 sys_read
+	data8 sys_write
+	data8 compat_sys_open	  /* 5 */
+	data8 sys_close
+	data8 sys32_waitpid
+	data8 sys_creat
+	data8 sys_link
+	data8 sys_unlink	  /* 10 */
+	data8 ia32_execve
+	data8 sys_chdir
+	data8 compat_sys_time
+	data8 sys_mknod
+	data8 sys_chmod		  /* 15 */
+	data8 sys_lchown	/* 16-bit version */
+	data8 sys_ni_syscall	  /* old break syscall holder */
+	data8 sys_ni_syscall
+	data8 sys32_lseek
+	data8 sys_getpid	  /* 20 */
+	data8 compat_sys_mount
+	data8 sys_oldumount
+	data8 sys_setuid	/* 16-bit version */
+	data8 sys_getuid	/* 16-bit version */
+	data8 compat_sys_stime    /* 25 */
+	data8 compat_sys_ptrace
+	data8 sys32_alarm
+	data8 sys_ni_syscall
+	data8 sys_pause
+	data8 compat_sys_utime	  /* 30 */
+	data8 sys_ni_syscall	  /* old stty syscall holder */
+	data8 sys_ni_syscall	  /* old gtty syscall holder */
+	data8 sys_access
+	data8 sys_nice
+	data8 sys_ni_syscall	  /* 35 */	  /* old ftime syscall holder */
+	data8 sys_sync
+	data8 sys_kill
+	data8 sys_rename
+	data8 sys_mkdir
+	data8 sys_rmdir		  /* 40 */
+	data8 sys_dup
+	data8 sys_ia64_pipe
+	data8 compat_sys_times
+	data8 sys_ni_syscall	  /* old prof syscall holder */
+	data8 sys32_brk		  /* 45 */
+	data8 sys_setgid	/* 16-bit version */
+	data8 sys_getgid	/* 16-bit version */
+	data8 sys32_signal
+	data8 sys_geteuid	/* 16-bit version */
+	data8 sys_getegid	/* 16-bit version */	  /* 50 */
+	data8 sys_acct
+	data8 sys_umount	  /* recycled never used phys( */
+	data8 sys_ni_syscall	  /* old lock syscall holder */
+	data8 compat_sys_ioctl
+	data8 compat_sys_fcntl	  /* 55 */
+	data8 sys_ni_syscall	  /* old mpx syscall holder */
+	data8 sys_setpgid
+	data8 sys_ni_syscall	  /* old ulimit syscall holder */
+	data8 sys_ni_syscall
+	data8 sys_umask		  /* 60 */
+	data8 sys_chroot
+	data8 compat_sys_ustat
+	data8 sys_dup2
+	data8 sys_getppid
+	data8 sys_getpgrp	  /* 65 */
+	data8 sys_setsid
+	data8 sys32_sigaction
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall
+	data8 sys_setreuid	/* 16-bit version */	  /* 70 */
+	data8 sys_setregid	/* 16-bit version */
+	data8 sys32_sigsuspend
+	data8 compat_sys_sigpending
+	data8 sys_sethostname
+	data8 compat_sys_setrlimit	  /* 75 */
+	data8 compat_sys_old_getrlimit
+	data8 compat_sys_getrusage
+	data8 compat_sys_gettimeofday
+	data8 compat_sys_settimeofday
+	data8 sys32_getgroups16	  /* 80 */
+	data8 sys32_setgroups16
+	data8 sys32_old_select
+	data8 sys_symlink
+	data8 sys_ni_syscall
+	data8 sys_readlink	  /* 85 */
+	data8 sys_uselib
+	data8 sys_swapon
+	data8 sys_reboot
+	data8 compat_sys_old_readdir
+	data8 sys32_mmap	  /* 90 */
+	data8 sys32_munmap
+	data8 sys_truncate
+	data8 sys_ftruncate
+	data8 sys_fchmod
+	data8 sys_fchown	/* 16-bit version */	  /* 95 */
+	data8 sys_getpriority
+	data8 sys_setpriority
+	data8 sys_ni_syscall	  /* old profil syscall holder */
+	data8 compat_sys_statfs
+	data8 compat_sys_fstatfs	  /* 100 */
+	data8 sys_ni_syscall	/* ioperm */
+	data8 compat_sys_socketcall
+	data8 sys_syslog
+	data8 compat_sys_setitimer
+	data8 compat_sys_getitimer	  /* 105 */
+	data8 compat_sys_newstat
+	data8 compat_sys_newlstat
+	data8 compat_sys_newfstat
+	data8 sys_ni_syscall
+	data8 sys_ni_syscall	/* iopl */	/* 110 */
+	data8 sys_vhangup
+	data8 sys_ni_syscall		/* used to be sys_idle */
+	data8 sys_ni_syscall
+	data8 compat_sys_wait4
+	data8 sys_swapoff	  /* 115 */
+	data8 compat_sys_sysinfo
+	data8 sys32_ipc
+	data8 sys_fsync
+	data8 sys32_sigreturn
+	data8 ia32_clone	  /* 120 */
+	data8 sys_setdomainname
+	data8 sys32_newuname
+	data8 sys32_modify_ldt
+	data8 compat_sys_adjtimex
+	data8 sys32_mprotect	  /* 125 */
+	data8 compat_sys_sigprocmask
+	data8 sys_ni_syscall	/* create_module */
+	data8 sys_ni_syscall	/* init_module */
+	data8 sys_ni_syscall	/* delete_module */
+	data8 sys_ni_syscall	/* get_kernel_syms */  /* 130 */
+	data8 sys32_quotactl
+	data8 sys_getpgid
+	data8 sys_fchdir
+	data8 sys_ni_syscall	/* sys_bdflush */
+	data8 sys_sysfs		/* 135 */
+	data8 sys32_personality
+	data8 sys_ni_syscall	  /* for afs_syscall */
+	data8 sys_setfsuid	/* 16-bit version */
+	data8 sys_setfsgid	/* 16-bit version */
+	data8 sys_llseek	  /* 140 */
+	data8 compat_sys_getdents
+	data8 compat_sys_select
+	data8 sys_flock
+	data8 sys32_msync
+	data8 compat_sys_readv	  /* 145 */
+	data8 compat_sys_writev
+	data8 sys_getsid
+	data8 sys_fdatasync
+	data8 sys32_sysctl
+	data8 sys_mlock		  /* 150 */
+	data8 sys_munlock
+	data8 sys_mlockall
+	data8 sys_munlockall
+	data8 sys_sched_setparam
+	data8 sys_sched_getparam  /* 155 */
+	data8 sys_sched_setscheduler
+	data8 sys_sched_getscheduler
+	data8 sys_sched_yield
+	data8 sys_sched_get_priority_max
+	data8 sys_sched_get_priority_min	 /* 160 */
+	data8 sys32_sched_rr_get_interval
+	data8 compat_sys_nanosleep
+	data8 sys32_mremap
+	data8 sys_setresuid	/* 16-bit version */
+	data8 sys32_getresuid16	/* 16-bit version */	  /* 165 */
+	data8 sys_ni_syscall	/* vm86 */
+	data8 sys_ni_syscall	/* sys_query_module */
+	data8 sys_poll
+	data8 sys_ni_syscall	/* nfsservctl */
+	data8 sys_setresgid	  /* 170 */
+	data8 sys32_getresgid16
+	data8 sys_prctl
+	data8 sys32_rt_sigreturn
+	data8 sys32_rt_sigaction
+	data8 sys32_rt_sigprocmask /* 175 */
+	data8 sys_rt_sigpending
+	data8 compat_sys_rt_sigtimedwait
+	data8 sys32_rt_sigqueueinfo
+	data8 compat_sys_rt_sigsuspend
+	data8 sys32_pread	  /* 180 */
+	data8 sys32_pwrite
+	data8 sys_chown	/* 16-bit version */
+	data8 sys_getcwd
+	data8 sys_capget
+	data8 sys_capset	  /* 185 */
+	data8 sys32_sigaltstack
+	data8 sys32_sendfile
+	data8 sys_ni_syscall		  /* streams1 */
+	data8 sys_ni_syscall		  /* streams2 */
+	data8 sys32_vfork	  /* 190 */
+	data8 compat_sys_getrlimit
+	data8 sys32_mmap2
+	data8 sys32_truncate64
+	data8 sys32_ftruncate64
+	data8 sys32_stat64	  /* 195 */
+	data8 sys32_lstat64
+	data8 sys32_fstat64
+	data8 sys_lchown
+	data8 sys_getuid
+	data8 sys_getgid	  /* 200 */
+	data8 sys_geteuid
+	data8 sys_getegid
+	data8 sys_setreuid
+	data8 sys_setregid
+	data8 sys_getgroups	  /* 205 */
+	data8 sys_setgroups
+	data8 sys_fchown
+	data8 sys_setresuid
+	data8 sys_getresuid
+	data8 sys_setresgid	  /* 210 */
+	data8 sys_getresgid
+	data8 sys_chown
+	data8 sys_setuid
+	data8 sys_setgid
+	data8 sys_setfsuid	  /* 215 */
+	data8 sys_setfsgid
+	data8 sys_pivot_root
+	data8 sys_mincore
+	data8 sys_madvise
+	data8 compat_sys_getdents64	  /* 220 */
+	data8 compat_sys_fcntl64
+	data8 sys_ni_syscall		/* reserved for TUX */
+	data8 sys_ni_syscall		/* reserved for Security */
+	data8 sys_gettid
+	data8 sys_readahead	  /* 225 */
+ 	data8 sys_setxattr
+ 	data8 sys_lsetxattr
+ 	data8 sys_fsetxattr
+ 	data8 sys_getxattr
+ 	data8 sys_lgetxattr	/* 230 */
+ 	data8 sys_fgetxattr
+ 	data8 sys_listxattr
+ 	data8 sys_llistxattr
+ 	data8 sys_flistxattr
+ 	data8 sys_removexattr	/* 235 */
+ 	data8 sys_lremovexattr
+ 	data8 sys_fremovexattr
+	data8 sys_tkill
+ 	data8 sys_sendfile64
+	data8 compat_sys_futex	/* 240 */
+	data8 compat_sys_sched_setaffinity
+	data8 compat_sys_sched_getaffinity
+	data8 sys32_set_thread_area
+	data8 sys32_get_thread_area
+ 	data8 compat_sys_io_setup	/* 245 */
+ 	data8 sys_io_destroy
+ 	data8 compat_sys_io_getevents
+ 	data8 compat_sys_io_submit
+ 	data8 sys_io_cancel
+ 	data8 sys_fadvise64	/* 250 */
+	data8 sys_ni_syscall
+	data8 sys_exit_group
+ 	data8 sys_lookup_dcookie
+	data8 sys_epoll_create
+	data8 sys32_epoll_ctl	/* 255 */
+	data8 sys32_epoll_wait
+	data8 sys_remap_file_pages
+	data8 sys_set_tid_address
+ 	data8 compat_sys_timer_create
+ 	data8 compat_sys_timer_settime	/* 260 */
+ 	data8 compat_sys_timer_gettime
+ 	data8 sys_timer_getoverrun
+ 	data8 sys_timer_delete
+ 	data8 compat_sys_clock_settime
+ 	data8 compat_sys_clock_gettime /* 265 */
+ 	data8 compat_sys_clock_getres
+ 	data8 compat_sys_clock_nanosleep
+	data8 compat_sys_statfs64
+	data8 compat_sys_fstatfs64
+ 	data8 sys_tgkill	/* 270 */
+ 	data8 compat_sys_utimes
+ 	data8 sys32_fadvise64_64
+ 	data8 sys_ni_syscall
+  	data8 sys_ni_syscall
+ 	data8 sys_ni_syscall	/* 275 */
+  	data8 sys_ni_syscall
+  	data8 compat_sys_mq_open
+  	data8 sys_mq_unlink
+  	data8 compat_sys_mq_timedsend
+  	data8 compat_sys_mq_timedreceive	/* 280 */
+  	data8 compat_sys_mq_notify
+  	data8 compat_sys_mq_getsetattr
+	data8 sys_ni_syscall		/* reserved for kexec */
+	data8 compat_sys_waitid
+
+	// guard against failures to increase IA32_NR_syscalls
+	.org ia32_syscall_table + 8*IA32_NR_syscalls

kernel/arch/ia64/ia32/ia32_ldt.c

@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2001, 2004 Hewlett-Packard Co
+ *	David Mosberger-Tang <davidm@hpl.hp.com>
+ *
+ * Adapted from arch/i386/kernel/ldt.c
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/vmalloc.h>
+
+#include <asm/uaccess.h>
+
+#include "ia32priv.h"
+
+/*
+ * read_ldt() is not really atomic - this is not a problem since synchronization of reads
+ * and writes done to the LDT has to be assured by user-space anyway. Writes are atomic,
+ * to protect the security checks done on new descriptors.
+ */
+static int
+read_ldt (void __user *ptr, unsigned long bytecount)
+{
+	unsigned long bytes_left, n;
+	char __user *src, *dst;
+	char buf[256];	/* temporary buffer (don't overflow kernel stack!) */
+
+	if (bytecount > IA32_LDT_ENTRIES*IA32_LDT_ENTRY_SIZE)
+		bytecount = IA32_LDT_ENTRIES*IA32_LDT_ENTRY_SIZE;
+
+	bytes_left = bytecount;
+
+	src = (void __user *) IA32_LDT_OFFSET;
+	dst = ptr;
+
+	while (bytes_left) {
+		n = sizeof(buf);
+		if (n > bytes_left)
+			n = bytes_left;
+
+		/*
+		 * We know we're reading valid memory, but we still must guard against
+		 * running out of memory.
+		 */
+		if (__copy_from_user(buf, src, n))
+			return -EFAULT;
+
+		if (copy_to_user(dst, buf, n))
+			return -EFAULT;
+
+		src += n;
+		dst += n;
+		bytes_left -= n;
+	}
+	return bytecount;
+}
+
+static int
+read_default_ldt (void __user * ptr, unsigned long bytecount)
+{
+	unsigned long size;
+	int err;
+
+	/* XXX fix me: should return equivalent of default_ldt[0] */
+	err = 0;
+	size = 8;
+	if (size > bytecount)
+		size = bytecount;
+
+	err = size;
+	if (clear_user(ptr, size))
+		err = -EFAULT;
+
+	return err;
+}
+
+static int
+write_ldt (void __user * ptr, unsigned long bytecount, int oldmode)
+{
+	struct ia32_user_desc ldt_info;
+	__u64 entry;
+	int ret;
+
+	if (bytecount != sizeof(ldt_info))
+		return -EINVAL;
+	if (copy_from_user(&ldt_info, ptr, sizeof(ldt_info)))
+		return -EFAULT;
+
+	if (ldt_info.entry_number >= IA32_LDT_ENTRIES)
+		return -EINVAL;
+	if (ldt_info.contents == 3) {
+		if (oldmode)
+			return -EINVAL;
+		if (ldt_info.seg_not_present == 0)
+			return -EINVAL;
+	}
+
+	if (ldt_info.base_addr == 0 && ldt_info.limit == 0
+	    && (oldmode || (ldt_info.contents == 0 && ldt_info.read_exec_only == 1
+			    && ldt_info.seg_32bit == 0 && ldt_info.limit_in_pages == 0
+			    && ldt_info.seg_not_present == 1 && ldt_info.useable == 0)))
+		/* allow LDTs to be cleared by the user */
+		entry = 0;
+	else
+		/* we must set the "Accessed" bit as IVE doesn't emulate it */
+		entry = IA32_SEG_DESCRIPTOR(ldt_info.base_addr, ldt_info.limit,
+					    (((ldt_info.read_exec_only ^ 1) << 1)
+					     | (ldt_info.contents << 2)) | 1,
+					    1, 3, ldt_info.seg_not_present ^ 1,
+					    (oldmode ? 0 : ldt_info.useable),
+					    ldt_info.seg_32bit,
+					    ldt_info.limit_in_pages);
+	/*
+	 * Install the new entry.  We know we're accessing valid (mapped) user-level
+	 * memory, but we still need to guard against out-of-memory, hence we must use
+	 * put_user().
+	 */
+	ret = __put_user(entry, (__u64 __user *) IA32_LDT_OFFSET + ldt_info.entry_number);
+	ia32_load_segment_descriptors(current);
+	return ret;
+}
+
+asmlinkage int
+sys32_modify_ldt (int func, unsigned int ptr, unsigned int bytecount)
+{
+	int ret = -ENOSYS;
+
+	switch (func) {
+	      case 0:
+		ret = read_ldt(compat_ptr(ptr), bytecount);
+		break;
+	      case 1:
+		ret = write_ldt(compat_ptr(ptr), bytecount, 1);
+		break;
+	      case 2:
+		ret = read_default_ldt(compat_ptr(ptr), bytecount);
+		break;
+	      case 0x11:
+		ret = write_ldt(compat_ptr(ptr), bytecount, 0);
+		break;
+	}
+	return ret;
+}

kernel/arch/ia64/ia32/ia32_support.c

@@ -0,0 +1,253 @@
+/*
+ * IA32 helper functions
+ *
+ * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
+ * Copyright (C) 2000 Asit K. Mallick <asit.k.mallick@intel.com>
+ * Copyright (C) 2001-2002 Hewlett-Packard Co
+ *	David Mosberger-Tang <davidm@hpl.hp.com>
+ *
+ * 06/16/00	A. Mallick	added csd/ssd/tssd for ia32 thread context
+ * 02/19/01	D. Mosberger	dropped tssd; it's not needed
+ * 09/14/01	D. Mosberger	fixed memory management for gdt/tss page
+ * 09/29/01	D. Mosberger	added ia32_load_segment_descriptors()
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+
+#include <asm/intrinsics.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/processor.h>
+#include <asm/uaccess.h>
+
+#include "ia32priv.h"
+
+extern int die_if_kernel (char *str, struct pt_regs *regs, long err);
+
+struct page *ia32_shared_page[NR_CPUS];
+unsigned long *ia32_boot_gdt;
+unsigned long *cpu_gdt_table[NR_CPUS];
+struct page *ia32_gate_page;
+
+static unsigned long
+load_desc (u16 selector)
+{
+	unsigned long *table, limit, index;
+
+	if (!selector)
+		return 0;
+	if (selector & IA32_SEGSEL_TI) {
+		table = (unsigned long *) IA32_LDT_OFFSET;
+		limit = IA32_LDT_ENTRIES;
+	} else {
+		table = cpu_gdt_table[smp_processor_id()];
+		limit = IA32_PAGE_SIZE / sizeof(ia32_boot_gdt[0]);
+	}
+	index = selector >> IA32_SEGSEL_INDEX_SHIFT;
+	if (index >= limit)
+		return 0;
+	return IA32_SEG_UNSCRAMBLE(table[index]);
+}
+
+void
+ia32_load_segment_descriptors (struct task_struct *task)
+{
+	struct pt_regs *regs = task_pt_regs(task);
+
+	/* Setup the segment descriptors */
+	regs->r24 = load_desc(regs->r16 >> 16);		/* ESD */
+	regs->r27 = load_desc(regs->r16 >>  0);		/* DSD */
+	regs->r28 = load_desc(regs->r16 >> 32);		/* FSD */
+	regs->r29 = load_desc(regs->r16 >> 48);		/* GSD */
+	regs->ar_csd = load_desc(regs->r17 >>  0);	/* CSD */
+	regs->ar_ssd = load_desc(regs->r17 >> 16);	/* SSD */
+}
+
+int
+ia32_clone_tls (struct task_struct *child, struct pt_regs *childregs)
+{
+	struct desc_struct *desc;
+	struct ia32_user_desc info;
+	int idx;
+
+	if (copy_from_user(&info, (void __user *)(childregs->r14 & 0xffffffff), 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 = child->thread.tls_array + idx - GDT_ENTRY_TLS_MIN;
+	desc->a = LDT_entry_a(&info);
+	desc->b = LDT_entry_b(&info);
+
+	/* XXX: can this be done in a cleaner way ? */
+	load_TLS(&child->thread, smp_processor_id());
+	ia32_load_segment_descriptors(child);
+	load_TLS(&current->thread, smp_processor_id());
+
+	return 0;
+}
+
+void
+ia32_save_state (struct task_struct *t)
+{
+	t->thread.eflag = ia64_getreg(_IA64_REG_AR_EFLAG);
+	t->thread.fsr   = ia64_getreg(_IA64_REG_AR_FSR);
+	t->thread.fcr   = ia64_getreg(_IA64_REG_AR_FCR);
+	t->thread.fir   = ia64_getreg(_IA64_REG_AR_FIR);
+	t->thread.fdr   = ia64_getreg(_IA64_REG_AR_FDR);
+	ia64_set_kr(IA64_KR_IO_BASE, t->thread.old_iob);
+	ia64_set_kr(IA64_KR_TSSD, t->thread.old_k1);
+}
+
+void
+ia32_load_state (struct task_struct *t)
+{
+	unsigned long eflag, fsr, fcr, fir, fdr, tssd;
+	struct pt_regs *regs = task_pt_regs(t);
+
+	eflag = t->thread.eflag;
+	fsr = t->thread.fsr;
+	fcr = t->thread.fcr;
+	fir = t->thread.fir;
+	fdr = t->thread.fdr;
+	tssd = load_desc(_TSS);					/* TSSD */
+
+	ia64_setreg(_IA64_REG_AR_EFLAG, eflag);
+	ia64_setreg(_IA64_REG_AR_FSR, fsr);
+	ia64_setreg(_IA64_REG_AR_FCR, fcr);
+	ia64_setreg(_IA64_REG_AR_FIR, fir);
+	ia64_setreg(_IA64_REG_AR_FDR, fdr);
+	current->thread.old_iob = ia64_get_kr(IA64_KR_IO_BASE);
+	current->thread.old_k1 = ia64_get_kr(IA64_KR_TSSD);
+	ia64_set_kr(IA64_KR_IO_BASE, IA32_IOBASE);
+	ia64_set_kr(IA64_KR_TSSD, tssd);
+
+	regs->r17 = (_TSS << 48) | (_LDT << 32) | (__u32) regs->r17;
+	regs->r30 = load_desc(_LDT);				/* LDTD */
+	load_TLS(&t->thread, smp_processor_id());
+}
+
+/*
+ * Setup IA32 GDT and TSS
+ */
+void
+ia32_gdt_init (void)
+{
+	int cpu = smp_processor_id();
+
+	ia32_shared_page[cpu] = alloc_page(GFP_KERNEL);
+	if (!ia32_shared_page[cpu])
+		panic("failed to allocate ia32_shared_page[%d]\n", cpu);
+
+	cpu_gdt_table[cpu] = page_address(ia32_shared_page[cpu]);
+
+	/* Copy from the boot cpu's GDT */
+	memcpy(cpu_gdt_table[cpu], ia32_boot_gdt, PAGE_SIZE);
+}
+
+
+/*
+ * Setup IA32 GDT and TSS
+ */
+static void
+ia32_boot_gdt_init (void)
+{
+	unsigned long ldt_size;
+
+	ia32_shared_page[0] = alloc_page(GFP_KERNEL);
+	if (!ia32_shared_page[0])
+		panic("failed to allocate ia32_shared_page[0]\n");
+
+	ia32_boot_gdt = page_address(ia32_shared_page[0]);
+	cpu_gdt_table[0] = ia32_boot_gdt;
+
+	/* CS descriptor in IA-32 (scrambled) format */
+	ia32_boot_gdt[__USER_CS >> 3]
+		= IA32_SEG_DESCRIPTOR(0, (IA32_GATE_END-1) >> IA32_PAGE_SHIFT,
+				      0xb, 1, 3, 1, 1, 1, 1);
+
+	/* DS descriptor in IA-32 (scrambled) format */
+	ia32_boot_gdt[__USER_DS >> 3]
+		= IA32_SEG_DESCRIPTOR(0, (IA32_GATE_END-1) >> IA32_PAGE_SHIFT,
+				      0x3, 1, 3, 1, 1, 1, 1);
+
+	ldt_size = PAGE_ALIGN(IA32_LDT_ENTRIES*IA32_LDT_ENTRY_SIZE);
+	ia32_boot_gdt[TSS_ENTRY] = IA32_SEG_DESCRIPTOR(IA32_TSS_OFFSET, 235,
+						       0xb, 0, 3, 1, 1, 1, 0);
+	ia32_boot_gdt[LDT_ENTRY] = IA32_SEG_DESCRIPTOR(IA32_LDT_OFFSET, ldt_size - 1,
+						       0x2, 0, 3, 1, 1, 1, 0);
+}
+
+static void
+ia32_gate_page_init(void)
+{
+	unsigned long *sr;
+
+	ia32_gate_page = alloc_page(GFP_KERNEL);
+	sr = page_address(ia32_gate_page);
+	/* This is popl %eax ; movl $,%eax ; int $0x80 */
+	*sr++ = 0xb858 | (__IA32_NR_sigreturn << 16) | (0x80cdUL << 48);
+
+	/* This is movl $,%eax ; int $0x80 */
+	*sr = 0xb8 | (__IA32_NR_rt_sigreturn << 8) | (0x80cdUL << 40);
+}
+
+void
+ia32_mem_init(void)
+{
+	ia32_boot_gdt_init();
+	ia32_gate_page_init();
+}
+
+/*
+ * Handle bad IA32 interrupt via syscall
+ */
+void
+ia32_bad_interrupt (unsigned long int_num, struct pt_regs *regs)
+{
+	siginfo_t siginfo;
+
+	if (die_if_kernel("Bad IA-32 interrupt", regs, int_num))
+		return;
+
+	siginfo.si_signo = SIGTRAP;
+	siginfo.si_errno = int_num;	/* XXX is it OK to abuse si_errno like this? */
+	siginfo.si_flags = 0;
+	siginfo.si_isr = 0;
+	siginfo.si_addr = NULL;
+	siginfo.si_imm = 0;
+	siginfo.si_code = TRAP_BRKPT;
+	force_sig_info(SIGTRAP, &siginfo, current);
+}
+
+void
+ia32_cpu_init (void)
+{
+	/* initialize global ia32 state - CR0 and CR4 */
+	ia64_setreg(_IA64_REG_AR_CFLAG, (((ulong) IA32_CR4 << 32) | IA32_CR0));
+}
+
+static int __init
+ia32_init (void)
+{
+#if PAGE_SHIFT > IA32_PAGE_SHIFT
+	{
+		extern struct kmem_cache *ia64_partial_page_cachep;
+
+		ia64_partial_page_cachep = kmem_cache_create("ia64_partial_page_cache",
+					sizeof(struct ia64_partial_page),
+					0, SLAB_PANIC, NULL);
+	}
+#endif
+	return 0;
+}
+
+__initcall(ia32_init);

kernel/arch/ia64/ia32/ia32_traps.c

@@ -0,0 +1,156 @@
+/*
+ * IA-32 exception handlers
+ *
+ * Copyright (C) 2000 Asit K. Mallick <asit.k.mallick@intel.com>
+ * Copyright (C) 2001-2002 Hewlett-Packard Co
+ *	David Mosberger-Tang <davidm@hpl.hp.com>
+ *
+ * 06/16/00	A. Mallick	added siginfo for most cases (close to IA32)
+ * 09/29/00	D. Mosberger	added ia32_intercept()
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+
+#include "ia32priv.h"
+
+#include <asm/intrinsics.h>
+#include <asm/ptrace.h>
+
+int
+ia32_intercept (struct pt_regs *regs, unsigned long isr)
+{
+	switch ((isr >> 16) & 0xff) {
+	      case 0:	/* Instruction intercept fault */
+	      case 4:	/* Locked Data reference fault */
+	      case 1:	/* Gate intercept trap */
+		return -1;
+
+	      case 2:	/* System flag trap */
+		if (((isr >> 14) & 0x3) >= 2) {
+			/* MOV SS, POP SS instructions */
+			ia64_psr(regs)->id = 1;
+			return 0;
+		} else
+			return -1;
+	}
+	return -1;
+}
+
+int
+ia32_exception (struct pt_regs *regs, unsigned long isr)
+{
+	struct siginfo siginfo;
+
+	/* initialize these fields to avoid leaking kernel bits to user space: */
+	siginfo.si_errno = 0;
+	siginfo.si_flags = 0;
+	siginfo.si_isr = 0;
+	siginfo.si_imm = 0;
+	switch ((isr >> 16) & 0xff) {
+	      case 1:
+	      case 2:
+		siginfo.si_signo = SIGTRAP;
+		if (isr == 0)
+			siginfo.si_code = TRAP_TRACE;
+		else if (isr & 0x4)
+			siginfo.si_code = TRAP_BRANCH;
+		else
+			siginfo.si_code = TRAP_BRKPT;
+		break;
+
+	      case 3:
+		siginfo.si_signo = SIGTRAP;
+		siginfo.si_code = TRAP_BRKPT;
+		break;
+
+	      case 0:	/* Divide fault */
+		siginfo.si_signo = SIGFPE;
+		siginfo.si_code = FPE_INTDIV;
+		break;
+
+	      case 4:	/* Overflow */
+	      case 5:	/* Bounds fault */
+		siginfo.si_signo = SIGFPE;
+		siginfo.si_code = 0;
+		break;
+
+	      case 6:	/* Invalid Op-code */
+		siginfo.si_signo = SIGILL;
+		siginfo.si_code = ILL_ILLOPN;
+		break;
+
+	      case 7:	/* FP DNA */
+	      case 8:	/* Double Fault */
+	      case 9:	/* Invalid TSS */
+	      case 11:	/* Segment not present */
+	      case 12:	/* Stack fault */
+	      case 13:	/* General Protection Fault */
+		siginfo.si_signo = SIGSEGV;
+		siginfo.si_code = 0;
+		break;
+
+	      case 16:	/* Pending FP error */
+		{
+			unsigned long fsr, fcr;
+
+			fsr = ia64_getreg(_IA64_REG_AR_FSR);
+			fcr = ia64_getreg(_IA64_REG_AR_FCR);
+
+			siginfo.si_signo = SIGFPE;
+			/*
+			 * (~cwd & swd) will mask out exceptions that are not set to unmasked
+			 * status.  0x3f is the exception bits in these regs, 0x200 is the
+			 * C1 reg you need in case of a stack fault, 0x040 is the stack
+			 * fault bit.  We should only be taking one exception at a time,
+			 * so if this combination doesn't produce any single exception,
+			 * then we have a bad program that isn't synchronizing its FPU usage
+			 * and it will suffer the consequences since we won't be able to
+			 * fully reproduce the context of the exception
+			 */
+			siginfo.si_isr = isr;
+			siginfo.si_flags = __ISR_VALID;
+			switch(((~fcr) & (fsr & 0x3f)) | (fsr & 0x240)) {
+				case 0x000:
+				default:
+					siginfo.si_code = 0;
+					break;
+				case 0x001: /* Invalid Op */
+				case 0x040: /* Stack Fault */
+				case 0x240: /* Stack Fault | Direction */
+					siginfo.si_code = FPE_FLTINV;
+					break;
+				case 0x002: /* Denormalize */
+				case 0x010: /* Underflow */
+					siginfo.si_code = FPE_FLTUND;
+					break;
+				case 0x004: /* Zero Divide */
+					siginfo.si_code = FPE_FLTDIV;
+					break;
+				case 0x008: /* Overflow */
+					siginfo.si_code = FPE_FLTOVF;
+					break;
+				case 0x020: /* Precision */
+					siginfo.si_code = FPE_FLTRES;
+					break;
+			}
+
+			break;
+		}
+
+	      case 17:	/* Alignment check */
+		siginfo.si_signo = SIGSEGV;
+		siginfo.si_code = BUS_ADRALN;
+		break;
+
+	      case 19:	/* SSE Numeric error */
+		siginfo.si_signo = SIGFPE;
+		siginfo.si_code = 0;
+		break;
+
+	      default:
+		return -1;
+	}
+	force_sig_info(siginfo.si_signo, &siginfo, current);
+	return 0;
+}

kernel/arch/ia64/ia32/ia32priv.h

@@ -0,0 +1,532 @@
+#ifndef _ASM_IA64_IA32_PRIV_H
+#define _ASM_IA64_IA32_PRIV_H
+
+
+#include <asm/ia32.h>
+
+#ifdef CONFIG_IA32_SUPPORT
+
+#include <linux/binfmts.h>
+#include <linux/compat.h>
+#include <linux/rbtree.h>
+
+#include <asm/processor.h>
+
+/*
+ * 32 bit structures for IA32 support.
+ */
+
+#define IA32_PAGE_SIZE		(1UL << IA32_PAGE_SHIFT)
+#define IA32_PAGE_MASK		(~(IA32_PAGE_SIZE - 1))
+#define IA32_PAGE_ALIGN(addr)	(((addr) + IA32_PAGE_SIZE - 1) & IA32_PAGE_MASK)
+#define IA32_CLOCKS_PER_SEC	100	/* Cast in stone for IA32 Linux */
+
+/*
+ * partially mapped pages provide precise accounting of which 4k sub pages
+ * are mapped and which ones are not, thereby improving IA-32 compatibility.
+ */
+struct ia64_partial_page {
+	struct ia64_partial_page *next; /* linked list, sorted by address */
+	struct rb_node		pp_rb;
+	/* 64K is the largest "normal" page supported by ia64 ABI. So 4K*64
+	 * should suffice.*/
+	unsigned long		bitmap;
+	unsigned int		base;
+};
+
+struct ia64_partial_page_list {
+	struct ia64_partial_page *pp_head; /* list head, points to the lowest
+					   * addressed partial page */
+	struct rb_root		ppl_rb;
+	struct ia64_partial_page *pp_hint; /* pp_hint->next is the last
+					   * accessed partial page */
+	atomic_t		pp_count; /* reference count */
+};
+
+#if PAGE_SHIFT > IA32_PAGE_SHIFT
+struct ia64_partial_page_list* ia32_init_pp_list (void);
+#else
+# define ia32_init_pp_list()	0
+#endif
+
+/* sigcontext.h */
+/*
+ * As documented in the iBCS2 standard..
+ *
+ * The first part of "struct _fpstate" is just the
+ * normal i387 hardware setup, the extra "status"
+ * word is used to save the coprocessor status word
+ * before entering the handler.
+ */
+struct _fpreg_ia32 {
+       unsigned short significand[4];
+       unsigned short exponent;
+};
+
+struct _fpxreg_ia32 {
+        unsigned short significand[4];
+        unsigned short exponent;
+        unsigned short padding[3];
+};
+
+struct _xmmreg_ia32 {
+        unsigned int element[4];
+};
+
+
+struct _fpstate_ia32 {
+       unsigned int    cw,
+		       sw,
+		       tag,
+		       ipoff,
+		       cssel,
+		       dataoff,
+		       datasel;
+       struct _fpreg_ia32      _st[8];
+       unsigned short  status;
+       unsigned short  magic;          /* 0xffff = regular FPU data only */
+
+       /* FXSR FPU environment */
+       unsigned int         _fxsr_env[6];   /* FXSR FPU env is ignored */
+       unsigned int         mxcsr;
+       unsigned int         reserved;
+       struct _fpxreg_ia32  _fxsr_st[8];    /* FXSR FPU reg data is ignored */
+       struct _xmmreg_ia32  _xmm[8];
+       unsigned int         padding[56];
+};
+
+struct sigcontext_ia32 {
+       unsigned short gs, __gsh;
+       unsigned short fs, __fsh;
+       unsigned short es, __esh;
+       unsigned short ds, __dsh;
+       unsigned int edi;
+       unsigned int esi;
+       unsigned int ebp;
+       unsigned int esp;
+       unsigned int ebx;
+       unsigned int edx;
+       unsigned int ecx;
+       unsigned int eax;
+       unsigned int trapno;
+       unsigned int err;
+       unsigned int eip;
+       unsigned short cs, __csh;
+       unsigned int eflags;
+       unsigned int esp_at_signal;
+       unsigned short ss, __ssh;
+       unsigned int fpstate;		/* really (struct _fpstate_ia32 *) */
+       unsigned int oldmask;
+       unsigned int cr2;
+};
+
+/* user.h */
+/*
+ * IA32 (Pentium III/4) FXSR, SSE support
+ *
+ * Provide support for the GDB 5.0+ PTRACE_{GET|SET}FPXREGS requests for
+ * interacting with the FXSR-format floating point environment.  Floating
+ * point data can be accessed in the regular format in the usual manner,
+ * and both the standard and SIMD floating point data can be accessed via
+ * the new ptrace requests.  In either case, changes to the FPU environment
+ * will be reflected in the task's state as expected.
+ */
+struct ia32_user_i387_struct {
+	int	cwd;
+	int	swd;
+	int	twd;
+	int	fip;
+	int	fcs;
+	int	foo;
+	int	fos;
+	/* 8*10 bytes for each FP-reg = 80 bytes */
+	struct _fpreg_ia32 	st_space[8];
+};
+
+struct ia32_user_fxsr_struct {
+	unsigned short	cwd;
+	unsigned short	swd;
+	unsigned short	twd;
+	unsigned short	fop;
+	int	fip;
+	int	fcs;
+	int	foo;
+	int	fos;
+	int	mxcsr;
+	int	reserved;
+	int	st_space[32];	/* 8*16 bytes for each FP-reg = 128 bytes */
+	int	xmm_space[32];	/* 8*16 bytes for each XMM-reg = 128 bytes */
+	int	padding[56];
+};
+
+/* signal.h */
+#define IA32_SET_SA_HANDLER(ka,handler,restorer)				\
+				((ka)->sa.sa_handler = (__sighandler_t)		\
+					(((unsigned long)(restorer) << 32)	\
+					 | ((handler) & 0xffffffff)))
+#define IA32_SA_HANDLER(ka)	((unsigned long) (ka)->sa.sa_handler & 0xffffffff)
+#define IA32_SA_RESTORER(ka)	((unsigned long) (ka)->sa.sa_handler >> 32)
+
+#define __IA32_NR_sigreturn 119
+#define __IA32_NR_rt_sigreturn 173
+
+struct sigaction32 {
+       unsigned int sa_handler;		/* Really a pointer, but need to deal with 32 bits */
+       unsigned int sa_flags;
+       unsigned int sa_restorer;	/* Another 32 bit pointer */
+       compat_sigset_t sa_mask;		/* A 32 bit mask */
+};
+
+struct old_sigaction32 {
+       unsigned int  sa_handler;	/* Really a pointer, but need to deal
+					     with 32 bits */
+       compat_old_sigset_t sa_mask;		/* A 32 bit mask */
+       unsigned int sa_flags;
+       unsigned int sa_restorer;	/* Another 32 bit pointer */
+};
+
+typedef struct sigaltstack_ia32 {
+	unsigned int	ss_sp;
+	int		ss_flags;
+	unsigned int	ss_size;
+} stack_ia32_t;
+
+struct ucontext_ia32 {
+	unsigned int	  uc_flags;
+	unsigned int	  uc_link;
+	stack_ia32_t	  uc_stack;
+	struct sigcontext_ia32 uc_mcontext;
+	sigset_t	  uc_sigmask;	/* mask last for extensibility */
+};
+
+struct stat64 {
+	unsigned long long	st_dev;
+	unsigned char	__pad0[4];
+	unsigned int	__st_ino;
+	unsigned int	st_mode;
+	unsigned int	st_nlink;
+	unsigned int	st_uid;
+	unsigned int	st_gid;
+	unsigned long long	st_rdev;
+	unsigned char	__pad3[4];
+	unsigned int	st_size_lo;
+	unsigned int	st_size_hi;
+	unsigned int	st_blksize;
+	unsigned int	st_blocks;	/* Number 512-byte blocks allocated. */
+	unsigned int	__pad4;		/* future possible st_blocks high bits */
+	unsigned int	st_atime;
+	unsigned int	st_atime_nsec;
+	unsigned int	st_mtime;
+	unsigned int	st_mtime_nsec;
+	unsigned int	st_ctime;
+	unsigned int	st_ctime_nsec;
+	unsigned int	st_ino_lo;
+	unsigned int	st_ino_hi;
+};
+
+typedef struct compat_siginfo {
+	int si_signo;
+	int si_errno;
+	int si_code;
+
+	union {
+		int _pad[((128/sizeof(int)) - 3)];
+
+		/* kill() */
+		struct {
+			unsigned int _pid;	/* sender's pid */
+			unsigned int _uid;	/* sender's uid */
+		} _kill;
+
+		/* POSIX.1b timers */
+		struct {
+			compat_timer_t _tid;		/* timer id */
+			int _overrun;		/* overrun count */
+			char _pad[sizeof(unsigned int) - sizeof(int)];
+			compat_sigval_t _sigval;	/* same as below */
+			int _sys_private;       /* not to be passed to user */
+		} _timer;
+
+		/* POSIX.1b signals */
+		struct {
+			unsigned int _pid;	/* sender's pid */
+			unsigned int _uid;	/* sender's uid */
+			compat_sigval_t _sigval;
+		} _rt;
+
+		/* SIGCHLD */
+		struct {
+			unsigned int _pid;	/* which child */
+			unsigned int _uid;	/* sender's uid */
+			int _status;		/* exit code */
+			compat_clock_t _utime;
+			compat_clock_t _stime;
+		} _sigchld;
+
+		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
+		struct {
+			unsigned int _addr;	/* faulting insn/memory ref. */
+		} _sigfault;
+
+		/* SIGPOLL */
+		struct {
+			int _band;	/* POLL_IN, POLL_OUT, POLL_MSG */
+			int _fd;
+		} _sigpoll;
+	} _sifields;
+} compat_siginfo_t;
+
+/*
+ * IA-32 ELF specific definitions for IA-64.
+ */
+
+#define _ASM_IA64_ELF_H		/* Don't include elf.h */
+
+#include <linux/sched.h>
+
+/*
+ * This is used to ensure we don't load something for the wrong architecture.
+ */
+#define elf_check_arch(x) ((x)->e_machine == EM_386)
+
+/*
+ * These are used to set parameters in the core dumps.
+ */
+#define ELF_CLASS	ELFCLASS32
+#define ELF_DATA	ELFDATA2LSB
+#define ELF_ARCH	EM_386
+
+#define IA32_STACK_TOP		IA32_PAGE_OFFSET
+#define IA32_GATE_OFFSET	IA32_PAGE_OFFSET
+#define IA32_GATE_END		IA32_PAGE_OFFSET + PAGE_SIZE
+
+/*
+ * The system segments (GDT, TSS, LDT) have to be mapped below 4GB so the IA-32 engine can
+ * access them.
+ */
+#define IA32_GDT_OFFSET		(IA32_PAGE_OFFSET + PAGE_SIZE)
+#define IA32_TSS_OFFSET		(IA32_PAGE_OFFSET + 2*PAGE_SIZE)
+#define IA32_LDT_OFFSET		(IA32_PAGE_OFFSET + 3*PAGE_SIZE)
+
+#define ELF_EXEC_PAGESIZE	IA32_PAGE_SIZE
+
+/*
+ * This is the location that an ET_DYN program is loaded if exec'ed.
+ * Typical use of this is to invoke "./ld.so someprog" to test out a
+ * new version of the loader.  We need to make sure that it is out of
+ * the way of the program that it will "exec", and that there is
+ * sufficient room for the brk.
+ */
+#define ELF_ET_DYN_BASE		(IA32_PAGE_OFFSET/3 + 0x1000000)
+
+void ia64_elf32_init(struct pt_regs *regs);
+#define ELF_PLAT_INIT(_r, load_addr)	ia64_elf32_init(_r)
+
+/* This macro yields a bitmask that programs can use to figure out
+   what instruction set this CPU supports.  */
+#define ELF_HWCAP	0
+
+/* This macro yields a string that ld.so will use to load
+   implementation specific libraries for optimization.  Not terribly
+   relevant until we have real hardware to play with... */
+#define ELF_PLATFORM	NULL
+
+#ifdef __KERNEL__
+# define SET_PERSONALITY(EX)				\
+	(current->personality = PER_LINUX)
+#endif
+
+#define IA32_EFLAG	0x200
+
+/*
+ * IA-32 ELF specific definitions for IA-64.
+ */
+
+#define __USER_CS      0x23
+#define __USER_DS      0x2B
+
+/*
+ * The per-cpu GDT has 32 entries: see <asm-i386/segment.h>
+ */
+#define GDT_ENTRIES 32
+
+#define GDT_SIZE	(GDT_ENTRIES * 8)
+
+#define TSS_ENTRY 14
+#define LDT_ENTRY	(TSS_ENTRY + 1)
+
+#define IA32_SEGSEL_RPL		(0x3 << 0)
+#define IA32_SEGSEL_TI		(0x1 << 2)
+#define IA32_SEGSEL_INDEX_SHIFT	3
+
+#define _TSS			((unsigned long) TSS_ENTRY << IA32_SEGSEL_INDEX_SHIFT)
+#define _LDT			((unsigned long) LDT_ENTRY << IA32_SEGSEL_INDEX_SHIFT)
+
+#define IA32_SEG_BASE		16
+#define IA32_SEG_TYPE		40
+#define IA32_SEG_SYS		44
+#define IA32_SEG_DPL		45
+#define IA32_SEG_P		47
+#define IA32_SEG_HIGH_LIMIT	48
+#define IA32_SEG_AVL		52
+#define IA32_SEG_DB		54
+#define IA32_SEG_G		55
+#define IA32_SEG_HIGH_BASE	56
+
+#define IA32_SEG_DESCRIPTOR(base, limit, segtype, nonsysseg, dpl, segpresent, avl, segdb, gran)	\
+	       (((limit) & 0xffff)								\
+		| (((unsigned long) (base) & 0xffffff) << IA32_SEG_BASE)			\
+		| ((unsigned long) (segtype) << IA32_SEG_TYPE)					\
+		| ((unsigned long) (nonsysseg) << IA32_SEG_SYS)					\
+		| ((unsigned long) (dpl) << IA32_SEG_DPL)					\
+		| ((unsigned long) (segpresent) << IA32_SEG_P)					\
+		| ((((unsigned long) (limit) >> 16) & 0xf) << IA32_SEG_HIGH_LIMIT)		\
+		| ((unsigned long) (avl) << IA32_SEG_AVL)					\
+		| ((unsigned long) (segdb) << IA32_SEG_DB)					\
+		| ((unsigned long) (gran) << IA32_SEG_G)					\
+		| ((((unsigned long) (base) >> 24) & 0xff) << IA32_SEG_HIGH_BASE))
+
+#define SEG_LIM		32
+#define SEG_TYPE	52
+#define SEG_SYS		56
+#define SEG_DPL		57
+#define SEG_P		59
+#define SEG_AVL		60
+#define SEG_DB		62
+#define SEG_G		63
+
+/* Unscramble an IA-32 segment descriptor into the IA-64 format.  */
+#define IA32_SEG_UNSCRAMBLE(sd)									 \
+	(   (((sd) >> IA32_SEG_BASE) & 0xffffff) | ((((sd) >> IA32_SEG_HIGH_BASE) & 0xff) << 24) \
+	 | ((((sd) & 0xffff) | ((((sd) >> IA32_SEG_HIGH_LIMIT) & 0xf) << 16)) << SEG_LIM)	 \
+	 | ((((sd) >> IA32_SEG_TYPE) & 0xf) << SEG_TYPE)					 \
+	 | ((((sd) >> IA32_SEG_SYS) & 0x1) << SEG_SYS)						 \
+	 | ((((sd) >> IA32_SEG_DPL) & 0x3) << SEG_DPL)						 \
+	 | ((((sd) >> IA32_SEG_P) & 0x1) << SEG_P)						 \
+	 | ((((sd) >> IA32_SEG_AVL) & 0x1) << SEG_AVL)						 \
+	 | ((((sd) >> IA32_SEG_DB) & 0x1) << SEG_DB)						 \
+	 | ((((sd) >> IA32_SEG_G) & 0x1) << SEG_G))
+
+#define IA32_IOBASE	0x2000000000000000UL /* Virtual address for I/O space */
+
+#define IA32_CR0	0x80000001	/* Enable PG and PE bits */
+#define IA32_CR4	0x600		/* MMXEX and FXSR on */
+
+/*
+ *  IA32 floating point control registers starting values
+ */
+
+#define IA32_FSR_DEFAULT	0x55550000		/* set all tag bits */
+#define IA32_FCR_DEFAULT	0x17800000037fUL	/* extended precision, all masks */
+
+#define IA32_PTRACE_GETREGS	12
+#define IA32_PTRACE_SETREGS	13
+#define IA32_PTRACE_GETFPREGS	14
+#define IA32_PTRACE_SETFPREGS	15
+#define IA32_PTRACE_GETFPXREGS	18
+#define IA32_PTRACE_SETFPXREGS	19
+
+#define ia32_start_thread(regs,new_ip,new_sp) do {				\
+	set_fs(USER_DS);							\
+	ia64_psr(regs)->cpl = 3;	/* set user mode */			\
+	ia64_psr(regs)->ri = 0;		/* clear return slot number */		\
+	ia64_psr(regs)->is = 1;		/* IA-32 instruction set */		\
+	regs->cr_iip = new_ip;							\
+	regs->ar_rsc = 0xc;		/* enforced lazy mode, priv. level 3 */	\
+	regs->ar_rnat = 0;							\
+	regs->loadrs = 0;							\
+	regs->r12 = new_sp;							\
+} while (0)
+
+/*
+ * Local Descriptor Table (LDT) related declarations.
+ */
+
+#define IA32_LDT_ENTRIES	8192		/* Maximum number of LDT entries supported. */
+#define IA32_LDT_ENTRY_SIZE	8		/* The size of each LDT entry. */
+
+#define LDT_entry_a(info) \
+	((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
+
+#define LDT_entry_b(info)				\
+	(((info)->base_addr & 0xff000000) |		\
+	(((info)->base_addr & 0x00ff0000) >> 16) |	\
+	((info)->limit & 0xf0000) |			\
+	(((info)->read_exec_only ^ 1) << 9) |		\
+	((info)->contents << 10) |			\
+	(((info)->seg_not_present ^ 1) << 15) |		\
+	((info)->seg_32bit << 22) |			\
+	((info)->limit_in_pages << 23) |		\
+	((info)->useable << 20) |			\
+	0x7100)
+
+#define LDT_empty(info) (			\
+	(info)->base_addr	== 0	&&	\
+	(info)->limit		== 0	&&	\
+	(info)->contents	== 0	&&	\
+	(info)->read_exec_only	== 1	&&	\
+	(info)->seg_32bit	== 0	&&	\
+	(info)->limit_in_pages	== 0	&&	\
+	(info)->seg_not_present	== 1	&&	\
+	(info)->useable		== 0	)
+
+static inline void
+load_TLS (struct thread_struct *t, unsigned int cpu)
+{
+	extern unsigned long *cpu_gdt_table[NR_CPUS];
+
+	memcpy(cpu_gdt_table[cpu] + GDT_ENTRY_TLS_MIN + 0, &t->tls_array[0], sizeof(long));
+	memcpy(cpu_gdt_table[cpu] + GDT_ENTRY_TLS_MIN + 1, &t->tls_array[1], sizeof(long));
+	memcpy(cpu_gdt_table[cpu] + GDT_ENTRY_TLS_MIN + 2, &t->tls_array[2], sizeof(long));
+}
+
+struct ia32_user_desc {
+	unsigned int entry_number;
+	unsigned int base_addr;
+	unsigned int limit;
+	unsigned int seg_32bit:1;
+	unsigned int contents:2;
+	unsigned int read_exec_only:1;
+	unsigned int limit_in_pages:1;
+	unsigned int seg_not_present:1;
+	unsigned int useable:1;
+};
+
+struct linux_binprm;
+
+extern void ia32_init_addr_space (struct pt_regs *regs);
+extern int ia32_setup_arg_pages (struct linux_binprm *bprm, int exec_stack);
+extern unsigned long ia32_do_mmap (struct file *, unsigned long, unsigned long, int, int, loff_t);
+extern void ia32_load_segment_descriptors (struct task_struct *task);
+
+#define ia32f2ia64f(dst,src)			\
+do {						\
+	ia64_ldfe(6,src);			\
+	ia64_stop();				\
+	ia64_stf_spill(dst, 6);			\
+} while(0)
+
+#define ia64f2ia32f(dst,src)			\
+do {						\
+	ia64_ldf_fill(6, src);			\
+	ia64_stop();				\
+	ia64_stfe(dst, 6);			\
+} while(0)
+
+struct user_regs_struct32 {
+	__u32 ebx, ecx, edx, esi, edi, ebp, eax;
+	unsigned short ds, __ds, es, __es;
+	unsigned short fs, __fs, gs, __gs;
+	__u32 orig_eax, eip;
+	unsigned short cs, __cs;
+	__u32 eflags, esp;
+	unsigned short ss, __ss;
+};
+
+/* Prototypes for use in elfcore32.h */
+extern int save_ia32_fpstate (struct task_struct *, struct ia32_user_i387_struct __user *);
+extern int save_ia32_fpxstate (struct task_struct *, struct ia32_user_fxsr_struct __user *);
+
+#endif /* !CONFIG_IA32_SUPPORT */
+
+#endif /* _ASM_IA64_IA32_PRIV_H */