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!

38 files changed, 15538 insertions, 0 deletions

diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
new file mode 100644
index 00000000000..b41e0e199a7
--- /dev/null
+++ b/arch/s390/kernel/Makefile
@@ -0,0 +1,31 @@
+#
+# Makefile for the linux kernel.
+#
+
+EXTRA_AFLAGS	:= -traditional
+
+obj-y	:=  bitmap.o traps.o time.o process.o \
+            setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
+            semaphore.o s390_ext.o debug.o profile.o irq.o
+
+extra-$(CONFIG_ARCH_S390_31)	+= head.o 
+extra-$(CONFIG_ARCH_S390X)	+= head64.o 
+extra-y				+= init_task.o vmlinux.lds
+
+obj-$(CONFIG_MODULES)		+= s390_ksyms.o module.o
+obj-$(CONFIG_SMP)		+= smp.o
+
+obj-$(CONFIG_S390_SUPPORT)	+= compat_linux.o compat_signal.o \
+					compat_ioctl.o compat_wrapper.o \
+					compat_exec_domain.o
+obj-$(CONFIG_BINFMT_ELF32)	+= binfmt_elf32.o
+
+obj-$(CONFIG_ARCH_S390_31)	+= entry.o reipl.o
+obj-$(CONFIG_ARCH_S390X)	+= entry64.o reipl64.o
+
+obj-$(CONFIG_VIRT_TIMER)	+= vtime.o
+
+#
+# This is just to get the dependencies...
+#
+binfmt_elf32.o:	$(TOPDIR)/fs/binfmt_elf.c
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
new file mode 100644
index 00000000000..3f7018e9dbe
--- /dev/null
+++ b/arch/s390/kernel/asm-offsets.c
@@ -0,0 +1,49 @@
+/*
+ * Generate definitions needed by assembly language modules.
+ * This code generates raw asm output which is post-processed to extract
+ * and format the required data.
+ */
+
+#include <linux/config.h>
+#include <linux/sched.h>
+
+/* Use marker if you need to separate the values later */
+
+#define DEFINE(sym, val, marker) \
+	asm volatile("\n->" #sym " %0 " #val " " #marker : : "i" (val))
+
+#define BLANK() asm volatile("\n->" : : )
+
+int main(void)
+{
+	DEFINE(__THREAD_info, offsetof(struct task_struct, thread_info),);
+	DEFINE(__THREAD_ksp, offsetof(struct task_struct, thread.ksp),);
+	DEFINE(__THREAD_per, offsetof(struct task_struct, thread.per_info),);
+	DEFINE(__THREAD_mm_segment,
+	       offsetof(struct task_struct, thread.mm_segment),);
+	BLANK();
+	DEFINE(__TASK_pid, offsetof(struct task_struct, pid),);
+	BLANK();
+	DEFINE(__PER_atmid, offsetof(per_struct, lowcore.words.perc_atmid),);
+	DEFINE(__PER_address, offsetof(per_struct, lowcore.words.address),);
+	DEFINE(__PER_access_id, offsetof(per_struct, lowcore.words.access_id),);
+	BLANK();
+	DEFINE(__TI_task, offsetof(struct thread_info, task),);
+	DEFINE(__TI_domain, offsetof(struct thread_info, exec_domain),);
+	DEFINE(__TI_flags, offsetof(struct thread_info, flags),);
+	DEFINE(__TI_cpu, offsetof(struct thread_info, cpu),);
+	DEFINE(__TI_precount, offsetof(struct thread_info, preempt_count),);
+	BLANK();
+	DEFINE(__PT_ARGS, offsetof(struct pt_regs, args),);
+	DEFINE(__PT_PSW, offsetof(struct pt_regs, psw),);
+	DEFINE(__PT_GPRS, offsetof(struct pt_regs, gprs),);
+	DEFINE(__PT_ORIG_GPR2, offsetof(struct pt_regs, orig_gpr2),);
+	DEFINE(__PT_ILC, offsetof(struct pt_regs, ilc),);
+	DEFINE(__PT_TRAP, offsetof(struct pt_regs, trap),);
+	DEFINE(__PT_SIZE, sizeof(struct pt_regs),);
+	BLANK();
+	DEFINE(__SF_BACKCHAIN, offsetof(struct stack_frame, back_chain),);
+	DEFINE(__SF_GPRS, offsetof(struct stack_frame, gprs),);
+	DEFINE(__SF_EMPTY, offsetof(struct stack_frame, empty1),);
+	return 0;
+}
diff --git a/arch/s390/kernel/binfmt_elf32.c b/arch/s390/kernel/binfmt_elf32.c
new file mode 100644
index 00000000000..03ba5893f17
--- /dev/null
+++ b/arch/s390/kernel/binfmt_elf32.c
@@ -0,0 +1,210 @@
+/*
+ * Support for 32-bit Linux for S390 ELF binaries.
+ *
+ * Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Author(s): Gerhard Tonn (ton@de.ibm.com)
+ *
+ * Heavily inspired by the 32-bit Sparc compat code which is
+ * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@redhat.com)
+ * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek   (jj@ultra.linux.cz)
+ */
+
+#define __ASMS390_ELF_H
+
+#include <linux/time.h>
+
+/*
+ * These are used to set parameters in the core dumps.
+ */
+#define ELF_CLASS	ELFCLASS32
+#define ELF_DATA	ELFDATA2MSB
+#define ELF_ARCH	EM_S390
+
+/*
+ * This is used to ensure we don't load something for the wrong architecture.
+ */
+#define elf_check_arch(x) \
+	(((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
+         && (x)->e_ident[EI_CLASS] == ELF_CLASS)
+
+/* ELF register definitions */
+#define NUM_GPRS      16
+#define NUM_FPRS      16
+#define NUM_ACRS      16    
+
+/* For SVR4/S390 the function pointer to be registered with `atexit` is
+   passed in R14. */
+#define ELF_PLAT_INIT(_r, load_addr) \
+	do { \
+		_r->gprs[14] = 0; \
+	} while(0)
+
+#define USE_ELF_CORE_DUMP
+#define ELF_EXEC_PAGESIZE       4096
+
+/* 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         (TASK_SIZE / 3 * 2)
+
+/* Wow, the "main" arch needs arch dependent functions too.. :) */
+
+/* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
+   now struct_user_regs, they are different) */
+
+#define ELF_CORE_COPY_REGS(pr_reg, regs) dump_regs32(regs, &pr_reg);
+
+#define ELF_CORE_COPY_TASK_REGS(tsk, regs) dump_task_regs32(tsk, regs)
+
+#define ELF_CORE_COPY_FPREGS(tsk, fpregs) dump_task_fpu(tsk, fpregs)
+
+/* This yields a mask that user programs can use to figure out what
+   instruction set this CPU supports. */
+
+#define ELF_HWCAP (0)
+
+/* This yields a string that ld.so will use to load implementation
+   specific libraries for optimization.  This is more specific in
+   intent than poking at uname or /proc/cpuinfo.
+
+   For the moment, we have only optimizations for the Intel generations,
+   but that could change... */
+
+#define ELF_PLATFORM (NULL)
+
+#define SET_PERSONALITY(ex, ibcs2)			\
+do {							\
+	if (ibcs2)                                      \
+		set_personality(PER_SVR4);              \
+	else if (current->personality != PER_LINUX32)   \
+		set_personality(PER_LINUX);             \
+	set_thread_flag(TIF_31BIT);			\
+} while (0)
+
+#include "compat_linux.h"
+
+typedef _s390_fp_regs32 elf_fpregset_t;
+
+typedef struct
+{
+	
+	_psw_t32	psw;
+	__u32		gprs[__NUM_GPRS]; 
+	__u32		acrs[__NUM_ACRS]; 
+	__u32		orig_gpr2;
+} s390_regs32;
+typedef s390_regs32 elf_gregset_t;
+
+static inline int dump_regs32(struct pt_regs *ptregs, elf_gregset_t *regs)
+{
+	int i;
+
+	memcpy(&regs->psw.mask, &ptregs->psw.mask, 4);
+	memcpy(&regs->psw.addr, (char *)&ptregs->psw.addr + 4, 4);
+	for (i = 0; i < NUM_GPRS; i++)
+		regs->gprs[i] = ptregs->gprs[i];
+	save_access_regs(regs->acrs);
+	regs->orig_gpr2 = ptregs->orig_gpr2;
+	return 1;
+}
+
+static inline int dump_task_regs32(struct task_struct *tsk, elf_gregset_t *regs)
+{
+	struct pt_regs *ptregs = __KSTK_PTREGS(tsk);
+	int i;
+
+	memcpy(&regs->psw.mask, &ptregs->psw.mask, 4);
+	memcpy(&regs->psw.addr, (char *)&ptregs->psw.addr + 4, 4);
+	for (i = 0; i < NUM_GPRS; i++)
+		regs->gprs[i] = ptregs->gprs[i];
+	memcpy(regs->acrs, tsk->thread.acrs, sizeof(regs->acrs));
+	regs->orig_gpr2 = ptregs->orig_gpr2;
+	return 1;
+}
+
+static inline int dump_task_fpu(struct task_struct *tsk, elf_fpregset_t *fpregs)
+{
+	if (tsk == current)
+		save_fp_regs((s390_fp_regs *) fpregs);
+	else
+		memcpy(fpregs, &tsk->thread.fp_regs, sizeof(elf_fpregset_t));
+	return 1;
+}
+
+#include <asm/processor.h>
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/elfcore.h>
+#include <linux/binfmts.h>
+#include <linux/compat.h>
+
+#define elf_prstatus elf_prstatus32
+struct elf_prstatus32
+{
+	struct elf_siginfo pr_info;	/* Info associated with signal */
+	short	pr_cursig;		/* Current signal */
+	u32	pr_sigpend;	/* Set of pending signals */
+	u32	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_prpsinfo elf_prpsinfo32
+struct elf_prpsinfo32
+{
+	char	pr_state;	/* numeric process state */
+	char	pr_sname;	/* char for pr_state */
+	char	pr_zomb;	/* zombie */
+	char	pr_nice;	/* nice val */
+	u32	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 */
+};
+
+#include <linux/highuid.h>
+
+#undef NEW_TO_OLD_UID
+#undef NEW_TO_OLD_GID
+#define NEW_TO_OLD_UID(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
+#define NEW_TO_OLD_GID(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid) 
+
+#define elf_addr_t	u32
+/*
+#define init_elf_binfmt init_elf32_binfmt
+*/
+
+#undef start_thread
+#define start_thread                    start_thread31 
+
+MODULE_DESCRIPTION("Binary format loader for compatibility with 32bit Linux for S390 binaries,"
+                   " Copyright 2000 IBM Corporation"); 
+MODULE_AUTHOR("Gerhard Tonn <ton@de.ibm.com>");
+
+#undef MODULE_DESCRIPTION
+#undef MODULE_AUTHOR
+
+#undef cputime_to_timeval
+#define cputime_to_timeval cputime_to_compat_timeval
+static __inline__ void
+cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
+{
+	value->tv_usec = cputime % 1000000;
+	value->tv_sec = cputime / 1000000;
+}
+
+#include "../../../fs/binfmt_elf.c"
+
diff --git a/arch/s390/kernel/bitmap.S b/arch/s390/kernel/bitmap.S
new file mode 100644
index 00000000000..dfb41f946e2
--- /dev/null
+++ b/arch/s390/kernel/bitmap.S
@@ -0,0 +1,56 @@
+/*
+ *  arch/s390/kernel/bitmap.S
+ *    Bitmaps for set_bit, clear_bit, test_and_set_bit, ...
+ *    See include/asm-s390/{bitops.h|posix_types.h} for details
+ *
+ *  S390 version
+ *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
+ */
+
+         .globl _oi_bitmap
+_oi_bitmap:
+         .byte  0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80
+
+         .globl _ni_bitmap
+_ni_bitmap:
+         .byte  0xFE,0xFD,0xFB,0xF7,0xEF,0xDF,0xBF,0x7F
+
+         .globl _zb_findmap
+_zb_findmap:
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,4
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,5
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,4 
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,6
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,4
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,5
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,4
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,7
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,4
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,5
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,4
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,6
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,4
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,5
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,4
+         .byte  0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,8
+
+         .globl _sb_findmap
+_sb_findmap:
+         .byte  8,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  5,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  6,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  5,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  7,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  5,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  6,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  5,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+         .byte  4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
+
diff --git a/arch/s390/kernel/compat_exec_domain.c b/arch/s390/kernel/compat_exec_domain.c
new file mode 100644
index 00000000000..71d27c49356
--- /dev/null
+++ b/arch/s390/kernel/compat_exec_domain.c
@@ -0,0 +1,30 @@
+/*
+ * Support for 32-bit Linux for S390 personality.
+ *
+ * Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Author(s): Gerhard Tonn (ton@de.ibm.com)
+ *
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/personality.h>
+#include <linux/sched.h>
+
+struct exec_domain s390_exec_domain;
+
+static int __init
+s390_init (void)
+{
+	s390_exec_domain.name = "Linux/s390";
+	s390_exec_domain.handler = NULL;
+	s390_exec_domain.pers_low = PER_LINUX32;
+	s390_exec_domain.pers_high = PER_LINUX32;
+	s390_exec_domain.signal_map = default_exec_domain.signal_map;
+	s390_exec_domain.signal_invmap = default_exec_domain.signal_invmap;
+	register_exec_domain(&s390_exec_domain);
+	return 0;
+}
+
+__initcall(s390_init);
diff --git a/arch/s390/kernel/compat_ioctl.c b/arch/s390/kernel/compat_ioctl.c
new file mode 100644
index 00000000000..96571ff7115
--- /dev/null
+++ b/arch/s390/kernel/compat_ioctl.c
@@ -0,0 +1,73 @@
+/*
+ * ioctl32.c: Conversion between 32bit and 64bit native ioctls.
+ *
+ *  S390 version
+ *    Copyright (C) 2000-2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Gerhard Tonn (ton@de.ibm.com)
+ *               Arnd Bergmann (arndb@de.ibm.com)
+ *
+ * Original implementation from 32-bit Sparc compat code which is
+ * Copyright (C) 2000 Silicon Graphics, Inc.
+ * Written by Ulf Carlsson (ulfc@engr.sgi.com) 
+ */
+
+#include "compat_linux.h"
+#define INCLUDES
+#define CODE
+#include "../../../fs/compat_ioctl.c"
+#include <asm/dasd.h>
+#include <asm/tape390.h>
+
+static int do_ioctl32_pointer(unsigned int fd, unsigned int cmd,
+				unsigned long arg, struct file *f)
+{
+	return sys_ioctl(fd, cmd, (unsigned long)compat_ptr(arg));
+}
+
+static int do_ioctl32_ulong(unsigned int fd, unsigned int cmd,
+				unsigned long arg, struct file *f)
+{
+	return sys_ioctl(fd, cmd, arg);
+}
+
+#define COMPATIBLE_IOCTL(cmd)		HANDLE_IOCTL((cmd),(ioctl_trans_handler_t)do_ioctl32_pointer)
+#define ULONG_IOCTL(cmd)		HANDLE_IOCTL((cmd),(ioctl_trans_handler_t)do_ioctl32_ulong)
+#define HANDLE_IOCTL(cmd,handler)	{ (cmd), (ioctl_trans_handler_t)(handler), NULL },
+
+struct ioctl_trans ioctl_start[] = {
+/* architecture independent ioctls */
+#include <linux/compat_ioctl.h>
+#define DECLARES
+#include "../../../fs/compat_ioctl.c"
+
+/* s390 only ioctls */
+#if defined(CONFIG_DASD) || defined(CONFIG_DASD_MODULE)
+COMPATIBLE_IOCTL(DASDAPIVER)
+COMPATIBLE_IOCTL(BIODASDDISABLE)
+COMPATIBLE_IOCTL(BIODASDENABLE)
+COMPATIBLE_IOCTL(BIODASDRSRV)
+COMPATIBLE_IOCTL(BIODASDRLSE)
+COMPATIBLE_IOCTL(BIODASDSLCK)
+COMPATIBLE_IOCTL(BIODASDINFO)
+COMPATIBLE_IOCTL(BIODASDINFO2)
+COMPATIBLE_IOCTL(BIODASDFMT)
+COMPATIBLE_IOCTL(BIODASDPRRST)
+COMPATIBLE_IOCTL(BIODASDQUIESCE)
+COMPATIBLE_IOCTL(BIODASDRESUME)
+COMPATIBLE_IOCTL(BIODASDPRRD)
+COMPATIBLE_IOCTL(BIODASDPSRD)
+COMPATIBLE_IOCTL(BIODASDGATTR)
+COMPATIBLE_IOCTL(BIODASDSATTR)
+
+#endif
+
+#if defined(CONFIG_S390_TAPE) || defined(CONFIG_S390_TAPE_MODULE)
+COMPATIBLE_IOCTL(TAPE390_DISPLAY)
+#endif
+
+/* s390 doesn't need handlers here */
+COMPATIBLE_IOCTL(TIOCGSERIAL)
+COMPATIBLE_IOCTL(TIOCSSERIAL)
+};
+
+int ioctl_table_size = ARRAY_SIZE(ioctl_start);
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
new file mode 100644
index 00000000000..61405622287
--- /dev/null
+++ b/arch/s390/kernel/compat_linux.c
@@ -0,0 +1,1045 @@
+/*
+ *  arch/s390x/kernel/linux32.c
+ *
+ *  S390 version
+ *    Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
+ *               Gerhard Tonn (ton@de.ibm.com)   
+ *               Thomas Spatzier (tspat@de.ibm.com)
+ *
+ *  Conversion between 31bit and 64bit native syscalls.
+ *
+ * Heavily inspired by the 32-bit Sparc compat code which is 
+ * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
+ *
+ */
+
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/fs.h> 
+#include <linux/mm.h> 
+#include <linux/file.h> 
+#include <linux/signal.h>
+#include <linux/resource.h>
+#include <linux/times.h>
+#include <linux/utsname.h>
+#include <linux/timex.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/slab.h>
+#include <linux/uio.h>
+#include <linux/nfs_fs.h>
+#include <linux/quota.h>
+#include <linux/module.h>
+#include <linux/sunrpc/svc.h>
+#include <linux/nfsd/nfsd.h>
+#include <linux/nfsd/cache.h>
+#include <linux/nfsd/xdr.h>
+#include <linux/nfsd/syscall.h>
+#include <linux/poll.h>
+#include <linux/personality.h>
+#include <linux/stat.h>
+#include <linux/filter.h>
+#include <linux/highmem.h>
+#include <linux/highuid.h>
+#include <linux/mman.h>
+#include <linux/ipv6.h>
+#include <linux/in.h>
+#include <linux/icmpv6.h>
+#include <linux/syscalls.h>
+#include <linux/sysctl.h>
+#include <linux/binfmts.h>
+#include <linux/compat.h>
+#include <linux/vfs.h>
+#include <linux/ptrace.h>
+
+#include <asm/types.h>
+#include <asm/ipc.h>
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+
+#include <net/scm.h>
+#include <net/sock.h>
+
+#include "compat_linux.h"
+
+ 
+/* For this source file, we want overflow handling. */
+
+#undef high2lowuid
+#undef high2lowgid
+#undef low2highuid
+#undef low2highgid
+#undef SET_UID16
+#undef SET_GID16
+#undef NEW_TO_OLD_UID
+#undef NEW_TO_OLD_GID
+#undef SET_OLDSTAT_UID
+#undef SET_OLDSTAT_GID
+#undef SET_STAT_UID
+#undef SET_STAT_GID
+
+#define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
+#define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
+#define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid)
+#define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid)
+#define SET_UID16(var, uid)	var = high2lowuid(uid)
+#define SET_GID16(var, gid)	var = high2lowgid(gid)
+#define NEW_TO_OLD_UID(uid)	high2lowuid(uid)
+#define NEW_TO_OLD_GID(gid)	high2lowgid(gid)
+#define SET_OLDSTAT_UID(stat, uid)	(stat).st_uid = high2lowuid(uid)
+#define SET_OLDSTAT_GID(stat, gid)	(stat).st_gid = high2lowgid(gid)
+#define SET_STAT_UID(stat, uid)		(stat).st_uid = high2lowuid(uid)
+#define SET_STAT_GID(stat, gid)		(stat).st_gid = high2lowgid(gid)
+
+asmlinkage long sys32_chown16(const char * filename, u16 user, u16 group)
+{
+	return sys_chown(filename, low2highuid(user), low2highgid(group));
+}
+
+asmlinkage long sys32_lchown16(const char * filename, u16 user, u16 group)
+{
+	return sys_lchown(filename, low2highuid(user), low2highgid(group));
+}
+
+asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
+{
+	return sys_fchown(fd, low2highuid(user), low2highgid(group));
+}
+
+asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
+{
+	return sys_setregid(low2highgid(rgid), low2highgid(egid));
+}
+
+asmlinkage long sys32_setgid16(u16 gid)
+{
+	return sys_setgid((gid_t)gid);
+}
+
+asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
+{
+	return sys_setreuid(low2highuid(ruid), low2highuid(euid));
+}
+
+asmlinkage long sys32_setuid16(u16 uid)
+{
+	return sys_setuid((uid_t)uid);
+}
+
+asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
+{
+	return sys_setresuid(low2highuid(ruid), low2highuid(euid),
+		low2highuid(suid));
+}
+
+asmlinkage long sys32_getresuid16(u16 *ruid, u16 *euid, u16 *suid)
+{
+	int retval;
+
+	if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
+	    !(retval = put_user(high2lowuid(current->euid), euid)))
+		retval = put_user(high2lowuid(current->suid), suid);
+
+	return retval;
+}
+
+asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
+{
+	return sys_setresgid(low2highgid(rgid), low2highgid(egid),
+		low2highgid(sgid));
+}
+
+asmlinkage long sys32_getresgid16(u16 *rgid, u16 *egid, u16 *sgid)
+{
+	int retval;
+
+	if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
+	    !(retval = put_user(high2lowgid(current->egid), egid)))
+		retval = put_user(high2lowgid(current->sgid), sgid);
+
+	return retval;
+}
+
+asmlinkage long sys32_setfsuid16(u16 uid)
+{
+	return sys_setfsuid((uid_t)uid);
+}
+
+asmlinkage long sys32_setfsgid16(u16 gid)
+{
+	return sys_setfsgid((gid_t)gid);
+}
+
+static int groups16_to_user(u16 *grouplist, struct group_info *group_info)
+{
+	int i;
+	u16 group;
+
+	for (i = 0; i < group_info->ngroups; i++) {
+		group = (u16)GROUP_AT(group_info, i);
+		if (put_user(group, grouplist+i))
+			return -EFAULT;
+	}
+
+	return 0;
+}
+
+static int groups16_from_user(struct group_info *group_info, u16 *grouplist)
+{
+	int i;
+	u16 group;
+
+	for (i = 0; i < group_info->ngroups; i++) {
+		if (get_user(group, grouplist+i))
+			return  -EFAULT;
+		GROUP_AT(group_info, i) = (gid_t)group;
+	}
+
+	return 0;
+}
+
+asmlinkage long sys32_getgroups16(int gidsetsize, u16 *grouplist)
+{
+	int i;
+
+	if (gidsetsize < 0)
+		return -EINVAL;
+
+	get_group_info(current->group_info);
+	i = current->group_info->ngroups;
+	if (gidsetsize) {
+		if (i > gidsetsize) {
+			i = -EINVAL;
+			goto out;
+		}
+		if (groups16_to_user(grouplist, current->group_info)) {
+			i = -EFAULT;
+			goto out;
+		}
+	}
+out:
+	put_group_info(current->group_info);
+	return i;
+}
+
+asmlinkage long sys32_setgroups16(int gidsetsize, u16 *grouplist)
+{
+	struct group_info *group_info;
+	int retval;
+
+	if (!capable(CAP_SETGID))
+		return -EPERM;
+	if ((unsigned)gidsetsize > NGROUPS_MAX)
+		return -EINVAL;
+
+	group_info = groups_alloc(gidsetsize);
+	if (!group_info)
+		return -ENOMEM;
+	retval = groups16_from_user(group_info, grouplist);
+	if (retval) {
+		put_group_info(group_info);
+		return retval;
+	}
+
+	retval = set_current_groups(group_info);
+	put_group_info(group_info);
+
+	return retval;
+}
+
+asmlinkage long sys32_getuid16(void)
+{
+	return high2lowuid(current->uid);
+}
+
+asmlinkage long sys32_geteuid16(void)
+{
+	return high2lowuid(current->euid);
+}
+
+asmlinkage long sys32_getgid16(void)
+{
+	return high2lowgid(current->gid);
+}
+
+asmlinkage long sys32_getegid16(void)
+{
+	return high2lowgid(current->egid);
+}
+
+/* 32-bit timeval and related flotsam.  */
+
+static inline long get_tv32(struct timeval *o, struct compat_timeval *i)
+{
+	return (!access_ok(VERIFY_READ, tv32, sizeof(*tv32)) ||
+		(__get_user(o->tv_sec, &i->tv_sec) ||
+		 __get_user(o->tv_usec, &i->tv_usec)));
+}
+
+static inline long put_tv32(struct compat_timeval *o, struct timeval *i)
+{
+	return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
+		(__put_user(i->tv_sec, &o->tv_sec) ||
+		 __put_user(i->tv_usec, &o->tv_usec)));
+}
+
+/*
+ * sys32_ipc() is the de-multiplexer for the SysV IPC calls in 32bit emulation.
+ *
+ * This is really horribly ugly.
+ */
+asmlinkage long sys32_ipc(u32 call, int first, int second, int third, u32 ptr)
+{
+	if (call >> 16)		/* hack for backward compatibility */
+		return -EINVAL;
+
+	call &= 0xffff;
+
+	switch (call) {
+	case SEMTIMEDOP:
+		return compat_sys_semtimedop(first, compat_ptr(ptr),
+					     second, compat_ptr(third));
+	case SEMOP:
+		/* struct sembuf is the same on 32 and 64bit :)) */
+		return sys_semtimedop(first, compat_ptr(ptr),
+				      second, NULL);
+	case SEMGET:
+		return sys_semget(first, second, third);
+	case SEMCTL:
+		return compat_sys_semctl(first, second, third,
+					 compat_ptr(ptr));
+	case MSGSND:
+		return compat_sys_msgsnd(first, second, third,
+					 compat_ptr(ptr));
+	case MSGRCV:
+		return compat_sys_msgrcv(first, second, 0, third,
+					 0, compat_ptr(ptr));
+	case MSGGET:
+		return sys_msgget((key_t) first, second);
+	case MSGCTL:
+		return compat_sys_msgctl(first, second, compat_ptr(ptr));
+	case SHMAT: