Merge master.kernel.org:/home/rmk/linux-2.6-arm

12 files changed, 574 insertions, 61 deletions

diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index de94b0f3ee2..2ce0e3a27a4 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_ARTHUR)		+= arthur.o
 obj-$(CONFIG_ISA_DMA)		+= dma-isa.o
 obj-$(CONFIG_PCI)		+= bios32.o
 obj-$(CONFIG_SMP)		+= smp.o
+obj-$(CONFIG_OABI_COMPAT)	+= sys_oabi-compat.o
 
 obj-$(CONFIG_IWMMXT)		+= iwmmxt.o
 AFLAGS_iwmmxt.o			:= -Wa,-mcpu=iwmmxt
diff --git a/arch/arm/kernel/armksyms.c b/arch/arm/kernel/armksyms.c
index 9997098009a..1574941ebfe 100644
--- a/arch/arm/kernel/armksyms.c
+++ b/arch/arm/kernel/armksyms.c
@@ -35,6 +35,16 @@ extern void __udivsi3(void);
 extern void __umodsi3(void);
 extern void __do_div64(void);
 
+extern void __aeabi_idiv(void);
+extern void __aeabi_idivmod(void);
+extern void __aeabi_lasr(void);
+extern void __aeabi_llsl(void);
+extern void __aeabi_llsr(void);
+extern void __aeabi_lmul(void);
+extern void __aeabi_uidiv(void);
+extern void __aeabi_uidivmod(void);
+extern void __aeabi_ulcmp(void);
+
 extern void fpundefinstr(void);
 extern void fp_enter(void);
 
@@ -141,6 +151,18 @@ EXPORT_SYMBOL(__udivsi3);
 EXPORT_SYMBOL(__umodsi3);
 EXPORT_SYMBOL(__do_div64);
 
+#ifdef CONFIG_AEABI
+EXPORT_SYMBOL(__aeabi_idiv);
+EXPORT_SYMBOL(__aeabi_idivmod);
+EXPORT_SYMBOL(__aeabi_lasr);
+EXPORT_SYMBOL(__aeabi_llsl);
+EXPORT_SYMBOL(__aeabi_llsr);
+EXPORT_SYMBOL(__aeabi_lmul);
+EXPORT_SYMBOL(__aeabi_uidiv);
+EXPORT_SYMBOL(__aeabi_uidivmod);
+EXPORT_SYMBOL(__aeabi_ulcmp);
+#endif
+
 	/* bitops */
 EXPORT_SYMBOL(_set_bit_le);
 EXPORT_SYMBOL(_test_and_set_bit_le);
diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
index 55076a75e5b..75e6f9a9471 100644
--- a/arch/arm/kernel/calls.S
+++ b/arch/arm/kernel/calls.S
@@ -13,7 +13,7 @@
 #define NR_syscalls 328
 #else
 
-__syscall_start:
+100:
 /* 0 */		.long	sys_restart_syscall
 		.long	sys_exit
 		.long	sys_fork_wrapper
@@ -27,7 +27,7 @@ __syscall_start:
 /* 10 */	.long	sys_unlink
 		.long	sys_execve_wrapper
 		.long	sys_chdir
-		.long	sys_time		/* used by libc4 */
+		.long	OBSOLETE(sys_time)	/* used by libc4 */
 		.long	sys_mknod
 /* 15 */	.long	sys_chmod
 		.long	sys_lchown16
@@ -36,15 +36,15 @@ __syscall_start:
 		.long	sys_lseek
 /* 20 */	.long	sys_getpid
 		.long	sys_mount
-		.long	sys_oldumount		/* used by libc4 */
+		.long	OBSOLETE(sys_oldumount)	/* used by libc4 */
 		.long	sys_setuid16
 		.long	sys_getuid16
-/* 25 */	.long	sys_stime
+/* 25 */	.long	OBSOLETE(sys_stime)
 		.long	sys_ptrace
-		.long	sys_alarm		/* used by libc4 */
+		.long	OBSOLETE(sys_alarm)	/* used by libc4 */
 		.long	sys_ni_syscall		/* was sys_fstat */
 		.long	sys_pause
-/* 30 */	.long	sys_utime		/* used by libc4 */
+/* 30 */	.long	OBSOLETE(sys_utime)	/* used by libc4 */
 		.long	sys_ni_syscall		/* was sys_stty */
 		.long	sys_ni_syscall		/* was sys_getty */
 		.long	sys_access
@@ -90,21 +90,21 @@ __syscall_start:
 		.long	sys_sigpending
 		.long	sys_sethostname
 /* 75 */	.long	sys_setrlimit
-		.long	sys_old_getrlimit	/* used by libc4 */
+		.long	OBSOLETE(sys_old_getrlimit) /* used by libc4 */
 		.long	sys_getrusage
 		.long	sys_gettimeofday
 		.long	sys_settimeofday
 /* 80 */	.long	sys_getgroups16
 		.long	sys_setgroups16
-		.long	old_select		/* used by libc4 */
+		.long	OBSOLETE(old_select)	/* used by libc4 */
 		.long	sys_symlink
 		.long	sys_ni_syscall		/* was sys_lstat */
 /* 85 */	.long	sys_readlink
 		.long	sys_uselib
 		.long	sys_swapon
 		.long	sys_reboot
-		.long	old_readdir		/* used by libc4 */
-/* 90 */	.long	old_mmap		/* used by libc4 */
+		.long	OBSOLETE(old_readdir)	/* used by libc4 */
+/* 90 */	.long	OBSOLETE(old_mmap)	/* used by libc4 */
 		.long	sys_munmap
 		.long	sys_truncate
 		.long	sys_ftruncate
@@ -116,7 +116,7 @@ __syscall_start:
 		.long	sys_statfs
 /* 100 */	.long	sys_fstatfs
 		.long	sys_ni_syscall
-		.long	sys_socketcall
+		.long	OBSOLETE(sys_socketcall)
 		.long	sys_syslog
 		.long	sys_setitimer
 /* 105 */	.long	sys_getitimer
@@ -127,11 +127,11 @@ __syscall_start:
 /* 110 */	.long	sys_ni_syscall		/* was sys_iopl */
 		.long	sys_vhangup
 		.long	sys_ni_syscall
-		.long	sys_syscall		/* call a syscall */
+		.long	OBSOLETE(sys_syscall)	/* call a syscall */
 		.long	sys_wait4
 /* 115 */	.long	sys_swapoff
 		.long	sys_sysinfo
-		.long	sys_ipc
+		.long	OBSOLETE(ABI(sys_ipc, sys_oabi_ipc))
 		.long	sys_fsync
 		.long	sys_sigreturn_wrapper
 /* 120 */	.long	sys_clone_wrapper
@@ -194,8 +194,8 @@ __syscall_start:
 		.long	sys_rt_sigtimedwait
 		.long	sys_rt_sigqueueinfo
 		.long	sys_rt_sigsuspend_wrapper
-/* 180 */	.long	sys_pread64
-		.long	sys_pwrite64
+/* 180 */	.long	ABI(sys_pread64, sys_oabi_pread64)
+		.long	ABI(sys_pwrite64, sys_oabi_pwrite64)
 		.long	sys_chown16
 		.long	sys_getcwd
 		.long	sys_capget
@@ -207,11 +207,11 @@ __syscall_start:
 /* 190 */	.long	sys_vfork_wrapper
 		.long	sys_getrlimit
 		.long	sys_mmap2
-		.long	sys_truncate64
-		.long	sys_ftruncate64
-/* 195 */	.long	sys_stat64
-		.long	sys_lstat64
-		.long	sys_fstat64
+		.long	ABI(sys_truncate64, sys_oabi_truncate64)
+		.long	ABI(sys_ftruncate64, sys_oabi_ftruncate64)
+/* 195 */	.long	ABI(sys_stat64, sys_oabi_stat64)
+		.long	ABI(sys_lstat64, sys_oabi_lstat64)
+		.long	ABI(sys_fstat64, sys_oabi_fstat64)
 		.long	sys_lchown
 		.long	sys_getuid
 /* 200 */	.long	sys_getgid
@@ -235,11 +235,11 @@ __syscall_start:
 		.long	sys_pivot_root
 		.long	sys_mincore
 /* 220 */	.long	sys_madvise
-		.long	sys_fcntl64
+		.long	ABI(sys_fcntl64, sys_oabi_fcntl64)
 		.long	sys_ni_syscall /* TUX */
 		.long	sys_ni_syscall
 		.long	sys_gettid
-/* 225 */	.long	sys_readahead
+/* 225 */	.long	ABI(sys_readahead, sys_oabi_readahead)
 		.long	sys_setxattr
 		.long	sys_lsetxattr
 		.long	sys_fsetxattr
@@ -265,8 +265,8 @@ __syscall_start:
 		.long	sys_exit_group
 		.long	sys_lookup_dcookie
 /* 250 */	.long	sys_epoll_create
-		.long	sys_epoll_ctl
-		.long	sys_epoll_wait
+		.long	ABI(sys_epoll_ctl, sys_oabi_epoll_ctl)
+		.long	ABI(sys_epoll_wait, sys_oabi_epoll_wait)
 	 	.long	sys_remap_file_pages
 		.long	sys_ni_syscall	/* sys_set_thread_area */
 /* 255 */	.long	sys_ni_syscall	/* sys_get_thread_area */
@@ -280,8 +280,8 @@ __syscall_start:
 		.long	sys_clock_gettime
 		.long	sys_clock_getres
 /* 265 */	.long	sys_clock_nanosleep
-		.long	sys_statfs64
-		.long	sys_fstatfs64
+		.long	sys_statfs64_wrapper
+		.long	sys_fstatfs64_wrapper
 		.long	sys_tgkill
 		.long	sys_utimes
 /* 270 */	.long	sys_arm_fadvise64_64
@@ -312,7 +312,7 @@ __syscall_start:
 /* 295 */	.long	sys_getsockopt
 		.long	sys_sendmsg
 		.long	sys_recvmsg
-		.long	sys_semop
+		.long	ABI(sys_semop, sys_oabi_semop)
 		.long	sys_semget
 /* 300 */	.long	sys_semctl
 		.long	sys_msgsnd
@@ -326,7 +326,7 @@ __syscall_start:
 		.long	sys_add_key
 /* 310 */	.long	sys_request_key
 		.long	sys_keyctl
-		.long	sys_semtimedop
+		.long	ABI(sys_semtimedop, sys_oabi_semtimedop)
 /* vserver */	.long	sys_ni_syscall
 		.long	sys_ioprio_set
 /* 315 */	.long	sys_ioprio_get
@@ -336,9 +336,8 @@ __syscall_start:
 		.long	sys_mbind
 /* 320 */	.long	sys_get_mempolicy
 		.long	sys_set_mempolicy
-__syscall_end:
 
-		.rept	NR_syscalls - (__syscall_end - __syscall_start) / 4
+		.rept	NR_syscalls - (. - 100b) / 4
 			.long	sys_ni_syscall
 		.endr
 #endif
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index a52baedf626..874e6bb7940 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -3,6 +3,7 @@
  *
  *  Copyright (C) 1996,1997,1998 Russell King.
  *  ARM700 fix by Matthew Godbolt (linux-user@willothewisp.demon.co.uk)
+ *  nommu support by Hyok S. Choi (hyok.choi@samsung.com)
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -104,14 +105,24 @@ common_invalid:
 /*
  * SVC mode handlers
  */
+
+#if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5)
+#define SPFIX(code...) code
+#else
+#define SPFIX(code...)
+#endif
+
 	.macro	svc_entry
 	sub	sp, sp, #S_FRAME_SIZE
+ SPFIX(	tst	sp, #4		)
+ SPFIX(	bicne	sp, sp, #4	)
 	stmib	sp, {r1 - r12}
 
 	ldmia	r0, {r1 - r3}
 	add	r5, sp, #S_SP		@ here for interlock avoidance
 	mov	r4, #-1			@  ""  ""      ""       ""
 	add	r0, sp, #S_FRAME_SIZE   @  ""  ""      ""       ""
+ SPFIX(	addne	r0, r0, #4	)
 	str	r1, [sp]		@ save the "real" r0 copied
 					@ from the exception stack
 
@@ -302,7 +313,14 @@ __pabt_svc:
 
 /*
  * User mode handlers
+ *
+ * EABI note: sp_svc is always 64-bit aligned here, so should S_FRAME_SIZE
  */
+
+#if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5) && (S_FRAME_SIZE & 7)
+#error "sizeof(struct pt_regs) must be a multiple of 8"
+#endif
+
 	.macro	usr_entry
 	sub	sp, sp, #S_FRAME_SIZE
 	stmib	sp, {r1 - r12}
@@ -538,7 +556,11 @@ ENTRY(__switch_to)
 	add	ip, r1, #TI_CPU_SAVE
 	ldr	r3, [r2, #TI_TP_VALUE]
 	stmia	ip!, {r4 - sl, fp, sp, lr}	@ Store most regs on stack
+#ifndef CONFIG_MMU
+	add	r2, r2, #TI_CPU_DOMAIN
+#else
 	ldr	r6, [r2, #TI_CPU_DOMAIN]!
+#endif
 #if __LINUX_ARM_ARCH__ >= 6
 #ifdef CONFIG_CPU_MPCORE
 	clrex
@@ -556,7 +578,9 @@ ENTRY(__switch_to)
 	mov	r4, #0xffff0fff
 	str	r3, [r4, #-15]			@ TLS val at 0xffff0ff0
 #endif
+#ifdef CONFIG_MMU
 	mcr	p15, 0, r6, c3, c0, 0		@ Set domain register
+#endif
 #ifdef CONFIG_VFP
 	@ Always disable VFP so we can lazily save/restore the old
 	@ state. This occurs in the context of the previous thread.
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index e2b42997ad3..2b92ce85f97 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -98,20 +98,14 @@ ENTRY(ret_from_fork)
 	   run on an ARM7 and we can save a couple of instructions.  
 								--pb */
 #ifdef CONFIG_CPU_ARM710
-	.macro	arm710_bug_check, instr, temp
-	and	\temp, \instr, #0x0f000000	@ check for SWI
-	teq	\temp, #0x0f000000
-	bne	.Larm700bug
-	.endm
-
-.Larm700bug:
+#define A710(code...) code
+.Larm710bug:
 	ldmia	sp, {r0 - lr}^			@ Get calling r0 - lr
 	mov	r0, r0
 	add	sp, sp, #S_FRAME_SIZE
 	subs	pc, lr, #4
 #else
-	.macro	arm710_bug_check, instr, temp
-	.endm
+#define A710(code...)
 #endif
 
 	.align	5
@@ -129,14 +123,50 @@ ENTRY(vector_swi)
 	/*
 	 * Get the system call number.
 	 */
+
+#if defined(CONFIG_OABI_COMPAT)
+
+	/*
+	 * If we have CONFIG_OABI_COMPAT then we need to look at the swi
+	 * value to determine if it is an EABI or an old ABI call.
+	 */
 #ifdef CONFIG_ARM_THUMB
+	tst	r8, #PSR_T_BIT
+	movne	r10, #0				@ no thumb OABI emulation
+	ldreq	r10, [lr, #-4]			@ get SWI instruction
+#else
+	ldr	r10, [lr, #-4]			@ get SWI instruction
+  A710(	and	ip, r10, #0x0f000000		@ check for SWI		)
+  A710(	teq	ip, #0x0f000000						)
+  A710(	bne	.Larm710bug						)
+#endif
+
+#elif defined(CONFIG_AEABI)
+
+	/*
+	 * Pure EABI user space always put syscall number into scno (r7).
+	 */
+  A710(	ldr	ip, [lr, #-4]			@ get SWI instruction	)
+  A710(	and	ip, ip, #0x0f000000		@ check for SWI		)
+  A710(	teq	ip, #0x0f000000						)
+  A710(	bne	.Larm710bug						)
+
+#elif defined(CONFIG_ARM_THUMB)
+
+	/* Legacy ABI only, possibly thumb mode. */
 	tst	r8, #PSR_T_BIT			@ this is SPSR from save_user_regs
 	addne	scno, r7, #__NR_SYSCALL_BASE	@ put OS number in
 	ldreq	scno, [lr, #-4]
+
 #else
+
+	/* Legacy ABI only. */
 	ldr	scno, [lr, #-4]			@ get SWI instruction
+  A710(	and	ip, scno, #0x0f000000		@ check for SWI		)
+  A710(	teq	ip, #0x0f000000						)
+  A710(	bne	.Larm710bug						)
+
 #endif
-	arm710_bug_check scno, ip
 
 #ifdef CONFIG_ALIGNMENT_TRAP
 	ldr	ip, __cr_alignment
@@ -145,18 +175,31 @@ ENTRY(vector_swi)
 #endif
 	enable_irq
 
-	stmdb	sp!, {r4, r5}			@ push fifth and sixth args
-
 	get_thread_info tsk
+	adr	tbl, sys_call_table		@ load syscall table pointer
 	ldr	ip, [tsk, #TI_FLAGS]		@ check for syscall tracing
+
+#if defined(CONFIG_OABI_COMPAT)
+	/*
+	 * If the swi argument is zero, this is an EABI call and we do nothing.
+	 *
+	 * If this is an old ABI call, get the syscall number into scno and
+	 * get the old ABI syscall table address.
+	 */
+	bics	r10, r10, #0xff000000
+	eorne	scno, r10, #__NR_OABI_SYSCALL_BASE
+	ldrne	tbl, =sys_oabi_call_table
+#elif !defined(CONFIG_AEABI)
 	bic	scno, scno, #0xff000000		@ mask off SWI op-code
 	eor	scno, scno, #__NR_SYSCALL_BASE	@ check OS number
-	adr	tbl, sys_call_table		@ load syscall table pointer
+#endif
+
+	stmdb	sp!, {r4, r5}			@ push fifth and sixth args
 	tst	ip, #_TIF_SYSCALL_TRACE		@ are we tracing syscalls?
 	bne	__sys_trace
 
-	adr	lr, ret_fast_syscall		@ return address
 	cmp	scno, #NR_syscalls		@ check upper syscall limit
+	adr	lr, ret_fast_syscall		@ return address
 	ldrcc	pc, [tbl, scno, lsl #2]		@ call sys_* routine
 
 	add	r1, sp, #S_OFF
@@ -171,11 +214,13 @@ ENTRY(vector_swi)
 	 * context switches, and waiting for our parent to respond.
 	 */
 __sys_trace:
+	mov	r2, scno
 	add	r1, sp, #S_OFF
 	mov	r0, #0				@ trace entry [IP = 0]
 	bl	syscall_trace
 
 	adr	lr, __sys_trace_return		@ return address
+	mov	scno, r0			@ syscall number (possibly new)
 	add	r1, sp, #S_R0 + S_OFF		@ pointer to regs
 	cmp	scno, #NR_syscalls		@ check upper syscall limit
 	ldmccia	r1, {r0 - r3}			@ have to reload r0 - r3
@@ -184,6 +229,7 @@ __sys_trace:
 
 __sys_trace_return:
 	str	r0, [sp, #S_R0 + S_OFF]!	@ save returned r0
+	mov	r2, scno
 	mov	r1, sp
 	mov	r0, #1				@ trace exit [IP = 1]
 	bl	syscall_trace
@@ -195,10 +241,24 @@ __sys_trace_return:
 __cr_alignment:
 	.word	cr_alignment
 #endif
+	.ltorg
+
+/*
+ * This is the syscall table declaration for native ABI syscalls.
+ * With EABI a couple syscalls are obsolete and defined as sys_ni_syscall.
+ */
+#define ABI(native, compat) native
+#ifdef CONFIG_AEABI
+#define OBSOLETE(syscall) sys_ni_syscall
+#else
+#define OBSOLETE(syscall) syscall
+#endif
 
 	.type	sys_call_table, #object
 ENTRY(sys_call_table)
 #include "calls.S"
+#undef ABI
+#undef OBSOLETE
 
 /*============================================================================
  * Special system call wrappers
@@ -207,7 +267,7 @@ ENTRY(sys_call_table)
 @ r8 = syscall table
 		.type	sys_syscall, #function
 sys_syscall:
-		eor	scno, r0, #__NR_SYSCALL_BASE
+		eor	scno, r0, #__NR_OABI_SYSCALL_BASE
 		cmp	scno, #__NR_syscall - __NR_SYSCALL_BASE
 		cmpne	scno, #NR_syscalls	@ check range
 		stmloia	sp, {r5, r6}		@ shuffle args
@@ -255,6 +315,16 @@ sys_sigaltstack_wrapper:
 		ldr	r2, [sp, #S_OFF + S_SP]
 		b	do_sigaltstack
 
+sys_statfs64_wrapper:
+		teq	r1, #88
+		moveq	r1, #84
+		b	sys_statfs64
+
+sys_fstatfs64_wrapper:
+		teq	r1, #88
+		moveq	r1, #84
+		b	sys_fstatfs64
+
 /*
  * Note: off_4k (r5) is always units of 4K.  If we can't do the requested
  * offset, we return EINVAL.
@@ -271,3 +341,49 @@ sys_mmap2:
 		str	r5, [sp, #4]
 		b	do_mmap2
 #endif
+
+#ifdef CONFIG_OABI_COMPAT
+
+/*
+ * These are syscalls with argument register differences
+ */
+
+sys_oabi_pread64:
+		stmia	sp, {r3, r4}
+		b	sys_pread64
+
+sys_oabi_pwrite64:
+		stmia	sp, {r3, r4}
+		b	sys_pwrite64
+
+sys_oabi_truncate64:
+		mov	r3, r2
+		mov	r2, r1
+		b	sys_truncate64
+
+sys_oabi_ftruncate64:
+		mov	r3, r2
+		mov	r2, r1
+		b	sys_ftruncate64
+
+sys_oabi_readahead:
+		str	r3, [sp]
+		mov	r3, r2
+		mov	r2, r1
+		b	sys_readahead
+
+/*
+ * Let's declare a second syscall table for old ABI binaries
+ * using the compatibility syscall entries.
+ */
+#define ABI(native, compat) compat
+#define OBSOLETE(syscall) syscall
+
+	.type	sys_oabi_call_table, #object
+ENTRY(sys_oabi_call_table)
+#include "calls.S"
+#undef ABI
+#undef OBSOLETE
+
+#endif
+
diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S
index 648cfff9313..55c99cdab7d 100644
--- a/arch/arm/kernel/entry-header.S
+++ b/arch/arm/kernel/entry-header.S
@@ -19,6 +19,7 @@
 @
 @ Most of the stack format comes from struct pt_regs, but with
 @ the addition of 8 bytes for storing syscall args 5 and 6.
+@ This _must_ remain a multiple of 8 for EABI.
 @
 #define S_OFF		8
 
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 1e985f2cd70..1aca1775b28 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -251,12 +251,11 @@ __turn_mmu_on:
  * r10 = procinfo
  *
  * Returns:
- *  r0, r3, r5, r6, r7 corrupted
+ *  r0, r3, r6, r7 corrupted
  *  r4 = physical page table address
  */
 	.type	__create_page_tables, %function
 __create_page_tables:
-	ldr	r5, [r8, #MACHINFO_PHYSRAM]	@ physram
 	pgtbl	r4				@ page table address
 
 	/*
@@ -303,7 +302,7 @@ __create_page_tables:
 	 * Then map first 1MB of ram in case it contains our boot params.
 	 */
 	add	r0, r4, #PAGE_OFFSET >> 18
-	orr	r6, r5, r7
+	orr	r6, r7, #PHYS_OFFSET
 	str	r6, [r0]
 
 #ifdef CONFIG_XIP_KERNEL
@@ -311,7 +310,7 @@ __create_page_tables:
 	 * Map some ram to cover our .data and .bss areas.
 	 * Mapping 3MB should be plenty.
 	 */
-	sub	r3, r4, r5
+	sub	r3, r4, #PHYS_OFFSET
 	mov	r3, r3, lsr #20
 	add	r0, r0, r3, lsl #2
 	add	r6, r6, r3, lsl #20
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index e591f72bcde..7b6256bb590 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -766,6 +766,11 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 				       (unsigned long __user *) data);
 			break;
 
+		case PTRACE_SET_SYSCALL:
+			ret = 0;
+			child->ptrace_message = data;
+			break;
+
 		default:
 			ret = ptrace_request(child, request, addr, data);
 			break;
@@ -774,14 +779,14 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 	return ret;
 }
 
-asmlinkage void syscall_trace(int why, struct pt_regs *regs)
+asmlinkage int syscall_trace(int why, struct pt_regs *regs, int scno)
 {
 	unsigned long ip;
 
 	if (!test_thread_flag(TIF_SYSCALL_TRACE))
-		return;
+		return scno;
 	if (!(current->ptrace & PT_PTRACED))
-		return;
+		return scno;
 
 	/*
 	 * Save IP.  IP is used to denote syscall entry/exit:
@@ -790,6 +795,8 @@ asmlinkage void syscall_trace(int why, struct pt_regs *regs)
 	ip = regs->ARM_ip;
 	regs->ARM_ip = why;
 
+	current->ptrace_message = scno;
+
 	/* the 0x80 provides a way for the tracing parent to distinguish
 	   between a syscall stop and SIGTRAP delivery */
 	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
@@ -804,4 +811,6 @@ asmlinkage void syscall_trace(int why, struct pt_regs *regs)
 		current->exit_code = 0;
 	}
 	regs->ARM_ip = ip;
+
+	return current->ptrace_message;
 }
diff --git a/arch/arm/kernel/semaphore.c b/arch/arm/kernel/semaphore.c
index 4c31f292305..981fe5c6ccb 100644
--- a/arch/arm/kernel/semaphore.c
+++ b/arch/arm/kernel/semaphore.c
@@ -177,41 +177,42 @@ int __down_trylock(struct semaphore * sem)
  * ip contains the semaphore pointer on entry. Save the C-clobbered
  * registers (r0 to r3 and lr), but not ip, as we use it as a return
  * value in some cases..
+ * To remain AAPCS compliant (64-bit stack align) we save r4 as well.
  */
 asm("	.section .sched.text,\"ax\",%progbits	\n\
 	.align	5				\n\
 	.globl	__down_failed			\n\
 __down_failed:					\n\
-	stmfd	sp!, {r0 - r3, lr}		\n\
+	stmfd	sp!, {r0 - r4, lr}		\n\
 	mov	r0, ip				\n\
 	bl	__down				\n\
-	ldmfd	sp!, {r0 - r3, pc}		\n\
+	ldmfd	sp!, {r0 - r4, pc}		\n\
 						\n\
 	.align	5				\n\
 	.globl	__down_interruptible_failed	\n\
 __down_interruptible_failed:			\n\
-	stmfd	sp!, {r0 - r3, lr}		\n\
+	stmfd	sp!, {r0 - r4, lr}		\n\
 	mov	r0, ip				\n\
 	bl	__down_interruptible		\n\
 	mov	ip, r0				\n\
-	ldmfd	sp!, {r0 - r3, pc}		\n\
+	ldmfd	sp!, {r0 - r4, pc}		\n\
 						\n\
 	.align	5				\n\
 	.globl	__down_trylock_failed		\n\
 __down_trylock_failed:				\n\
-	stmfd	sp!, {r0 - r3, lr}		\n\
+	stmfd	sp!, {r0 - r4, lr}		\n\
 	mov	r0, ip				\n\
 	bl	__down_trylock			\n\
 	mov	ip, r0				\n\
-	ldmfd	sp!, {r0 - r3, pc}		\n\
+	ldmfd	sp!, {r0 - r4, pc}		\n\
 						\n\
 	.align	5				\n\
 	.globl	__up_wakeup			\n\
 __up_wakeup:					\n\
-	stmfd	sp!, {r0 - r3, lr}		\n\
+	stmfd	sp!, {r0 - r4, lr}		\n\
 	mov	r0, ip				\n\
 	bl	__up				\n\
-	ldmfd	sp!, {r0 - r3, pc}		\n\
+	ldmfd	sp!, {r0 - r4, pc}		\n\
 	");
 
 EXPORT_SYMBOL(__down_failed);
diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index ea569ba482b..a491de2d902 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -147,6 +147,7 @@ asmlinkage int old_select(struct sel_arg_struct __user *arg)
 	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
 }
 
+#if !defined(CONFIG_AEABI) || defined(CONFIG_OABI_COMPAT)
 /*
  * sys_ipc() is the de-multiplexer for the SysV IPC calls..
  *
@@ -226,6 +227,7 @@ asmlinkage int sys_ipc(uint call, int first, int second, int third,
 		return -ENOSYS;
 	}
 }
+#endif
 
 /* Fork a new task - this creates a new program thread.
  * This is called indirectly via a small wrapper
diff --git a/arch/arm/kernel/sys_oabi-compat.c b/arch/arm/kernel/sys_oabi-compat.c
new file mode 100644
index 00000000000..eafa8e5284a
--- /dev/null
+++ b/arch/arm/kernel/sys_oabi-compat.c
@@ -0,0 +1,339 @@
+/*
+ *  arch/arm/kernel/sys_oabi-compat.c
+ *
+ *  Compatibility wrappers for syscalls that are used from
+ *  old ABI user space binaries with an EABI kernel.
+ *
+ *  Author:	Nicolas Pitre
+ *  Created:	Oct 7, 2005
+ *  Copyright:	MontaVista Software, Inc.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+
+/*
+ * The legacy ABI and the new ARM EABI have different rules making some
+ * syscalls incompatible especially with structure arguments.
+ * Most notably, Eabi says 64-bit members should be 64-bit aligned instead of
+ * simply word aligned.  EABI also pads structures to the size of the largest
+ * member it contains instead of the invariant 32-bit.
+ *
+ * The following syscalls are affected:
+ *
+ * sys_stat64:
+ * sys_lstat64:
+ * sys_fstat64:
+ *
+ *   struct stat64 has different sizes and some members are shifted
+ *   Compatibility wrappers are needed for them and provided below.
+ *
+ * sys_fcntl64:
+ *
+ *   struct flock64 has different sizes and some members are shifted
+ *   A compatibility wrapper is needed and provided below.
+ *
+ * sys_statfs64:
+ * sys_fstatfs64:
+ *
+ *   struct statfs64 has extra padding with EABI growing its size from
+ *   84 to 88.  This struct is now __attribute__((packed,aligned(4)))
+ *   with a small assembly wrapper to force the sz argument to 84 if it is 88
+ *   to avoid copying the extra padding over user space unexpecting it.
+ *
+ * sys_newuname:
+ *
+ *   struct new_utsname has no padding with EABI.  No problem there.
+ *
+ * sys_epoll_ctl:
+ * sys_epoll_wait:
+ *
+ *   struct epoll_event has its second member shifted also affecting the
+ *   structure size. Compatibility wrappers are needed and provided below.
+ *
+ * sys_ipc:
+ * sys_semop:
+ * sys_semtimedop:
+ *
+ *   struct sembuf loses its padding with EABI.  Since arrays of them are
+ *   used they have to be copyed to remove the padding. Compatibility wrappers
+ *   provided below.
+ */
+
+#include <linux/syscalls.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/fcntl.h>
+#include <linux/eventpoll.h>
+#include <linux/sem.h>
+#include <asm/ipc.h>
+#include <asm/uaccess.h>
+
+struct oldabi_stat64 {
+	unsigned long long st_dev;
+	unsigned int	__pad1;
+	unsigned long	__st_ino;
+	unsigned int	st_mode;
+	unsigned int	st_nlink;
+
+	unsigned long	st_uid;
+	unsigned long	st_gid;
+
+	unsigned long long st_rdev;
+	unsigned int	__pad2;
+
+	long long	st_size;
+	unsigned long	st_blksize;
+	unsigned long long st_blocks;
+
+	unsigned long	st_atime;
+	unsigned long	st_atime_nsec;
+
+	unsigned long	st_mtime;
+	unsigned long	st_mtime_nsec;
+
+	unsigned long	st_ctime;
+	unsigned long	st_ctime_nsec;
+
+	unsigned long long st_ino;
+} __attribute__ ((packed,aligned(4)));
+
+static long cp_oldabi_stat64(struct kstat *stat,
+			     struct oldabi_stat64 __user *statbuf)
+{
+	struct oldabi_stat64 tmp;
+
+	tmp.st_dev = huge_encode_dev(stat->dev);
+	tmp.__pad1 = 0;
+	tmp.__st_ino = stat->ino;
+	tmp.st_mode = stat->mode;
+	tmp.st_nlink = stat->nlink;
+	tmp.st_uid = stat->uid;
+	tmp.st_gid = stat->gid;
+	tmp.st_rdev = huge_encode_dev(stat->rdev);
+	tmp.st_size = stat->size;
+	tmp.st_blocks = stat->blocks;
+	tmp.__pad2 = 0;
+	tmp.st_blksize = stat->blksize;
+	tmp.st_atime = stat->atime.tv_sec;
+	tmp.st_atime_nsec = stat->atime.tv_nsec;
+	tmp.st_mtime = stat->mtime.tv_sec;
+	tmp.st_mtime_nsec = stat->mtime.tv_nsec;
+	tmp.st_ctime = stat->ctime.tv_sec;
+	tmp.st_ctime_nsec = stat->ctime.tv_nsec;
+	tmp.st_ino = stat->ino;
+	return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
+}
+
+asmlinkage long sys_oabi_stat64(char __user * filename,
+				struct oldabi_stat64 __user * statbuf)
+{
+	struct kstat stat;
+	int error = vfs_stat(filename, &stat);
+	if (!error)
+		error = cp_oldabi_stat64(&stat, statbuf);
+	return error;
+}
+
+asmlinkage long sys_oabi_lstat64(char __user * filename,
+				 struct oldabi_stat64 __user * statbuf)
+{
+	struct kstat stat;
+	int error = vfs_lstat(filename, &stat);
+	if (!error)
+		error = cp_oldabi_stat64(&stat, statbuf);
+	return error;
+}
+
+asmlinkage long sys_oabi_fstat64(unsigned long fd,
+				 struct oldabi_stat64 __user * statbuf)
+{
+	struct kstat stat;
+	int error = vfs_fstat(fd, &stat);
+	if (!error)
+		error = cp_oldabi_stat64(&stat, statbuf);
+	return error;
+}
+
+struct oabi_flock64 {
+	short	l_type;
+	short	l_whence;
+	loff_t	l_start;
+	loff_t	l_len;
+	pid_t	l_pid;
+} __attribute__ ((packed,aligned(4)));
+
+asmlinkage long sys_oabi_fcntl64(unsigned int fd, unsigned int cmd,
+				 unsigned long arg)
+{
+	struct oabi_flock64 user;
+	struct flock64 kernel;
+	mm_segment_t fs = USER_DS; /* initialized to kill a warning */
+	unsigned long local_arg = arg;
+	int ret;
+
+	switch (cmd) {
+	case F_GETLK64:
+	case F_SETLK64:
+	case F_SETLKW64:
+		if (copy_from_user(&user, (struct oabi_flock64 __user *)arg,
+				   sizeof(user)))
+			return -EFAULT;
+		kernel.l_type	= user.l_type;
+		kernel.l_whence	= user.l_whence;
+		kernel.l_start	= user.l_start;
+		kernel.l_len	= user.l_len;
+		kernel.l_pid	= user.l_pid;
+		local_arg = (unsigned long)&kernel;
+		fs = get_fs();
+		set_fs(KERNEL_DS);
+	}
+
+	ret = sys_fcntl64(fd, cmd, local_arg);
+
+	switch (cmd) {
+	case F_GETLK64:
+		if (!ret) {
+			user.l_type	= kernel.l_type;
+			user.l_whence	= kernel.l_whence;
+			user.l_start	= kernel.l_start;
+			user.l_len	= kernel.l_len;
+			user.l_pid	= kernel.l_pid;
+			if (copy_to_user((struct oabi_flock64 __user *)arg,
+					 &user, sizeof(user)))
+				ret = -EFAULT;
+		}
+	case F_SETLK64:
+	case F_SETLKW64:
+		set_fs(fs);
+	}
+
+	return ret;
+}
+
+struct oabi_epoll_event {
+	__u32 events;
+	__u64 data;
+} __attribute__ ((packed,aligned(4)));
+
+asmlinkage long sys_oabi_epoll_ctl(int epfd, int op, int fd,
+				   struct oabi_epoll_event __user *event)
+{
+	struct oabi_epoll_event user;
+	struct epoll_event kernel;
+	mm_segment_t fs;
+	long ret;
+
+	if (op == EPOLL_CTL_DEL)
+		return sys_epoll_ctl(epfd, op, fd, NULL);
+	if (copy_from_user(&user, event, sizeof(user)))
+		return -EFAULT;
+	kernel.events = user.events;
+	kernel.data   = user.data;
+	fs = get_fs();
+	set_fs(KERNEL_DS);
+	ret = sys_epoll_ctl(epfd, op, fd, &kernel);
+	set_fs(fs);
+	return ret;
+}
+
+asmlinkage long sys_oabi_epoll_wait(int epfd,
+				    struct oabi_epoll_event __user *events,
+				    int maxevents, int timeout)
+{
+	struct epoll_event *kbuf;
+	mm_segment_t fs;
+	long ret, err, i;
+
+	if (maxevents <= 0 || maxevents > (INT_MAX/sizeof(struct epoll_event)))
+		return -EINVAL;
+	kbuf = kmalloc(sizeof(*kbuf) * maxevents, GFP_KERNEL);
+	if (!kbuf)
+		return -ENOMEM;
+	fs = get_fs();
+	set_fs(KERNEL_DS);
+	ret = sys_epoll_wait(epfd, kbuf, maxevents, timeout);
+	set_fs(fs);
+	err = 0;
+	for (i = 0; i < ret; i++) {
+		__put_user_error(kbuf[i].events, &events->events, err);
+		__put_user_error(kbuf[i].data,   &events->data,   err);
+		events++;
+	}
+	kfree(kbuf);
+	return err ? -EFAULT : ret;
+}
+
+struct oabi_sembuf {
+	unsigned short	sem_num;
+	short		sem_op;
+	short		sem_flg;
+	unsigned short	__pad;
+};
+
+asmlinkage long sys_oabi_semtimedop(int semid,
+				    struct oabi_sembuf __user *tsops,
+				    unsigned nsops,
+				    const struct timespec __user *timeout)
+{
+	struct sembuf *sops;
+	struct timespec local_timeout;
+	long err;
+	int i;
+
+	if (nsops < 1)
+		return -EINVAL;
+	sops = kmalloc(sizeof(*sops) * nsops, GFP_KERNEL);
+	if (!sops)
+		return -ENOMEM;
+	err = 0;
+	for (i = 0; i < nsops; i++) {
+		__get_user_error(sops[i].sem_num, &tsops->sem_num, err);
+		__get_user_error(sops[i].sem_op,  &tsops->sem_op,  err);
+		__get_user_error(sops[i].sem_flg, &tsops->sem_flg, err);
+		tsops++;
+	}
+	if (timeout) {
+		/* copy this as well before changing domain protection */
+		err |= copy_from_user(&local_timeout, timeout, sizeof(*timeout));
+		timeout = &local_timeout;
+	}
+	if (err) {
+		err = -EFAULT;
+	} else {
+		mm_segment_t fs = get_fs();
+		set_fs(KERNEL_DS);
+		err = sys_semtimedop(semid, sops, nsops, timeout);
+		set_fs(fs);
+	}
+	kfree(sops);
+	return err;
+}
+
+asmlinkage long sys_oabi_semop(int semid, struct oabi_sembuf __user *tsops,
+			       unsigned nsops)
+{
+	return sys_oabi_semtimedop(semid, tsops, nsops, NULL);
+}
+
+extern asmlinkage int sys_ipc(uint call, int first, int second, int third,
+			      void __user *ptr, long fifth);
+
+asmlinkage int sys_oabi_ipc(uint call, int first, int second, int third,
+			    void __user *ptr, long fifth)
+{
+	switch (call & 0xffff) {
+	case SEMOP:
+		return  sys_oabi_semtimedop(first,
+					    (struct oabi_sembuf __user *)ptr,
+					    second, NULL);
+	case SEMTIMEDOP:
+		return  sys_oabi_semtimedop(first,
+					    (struct oabi_sembuf __user *)ptr,
+					    second,
+					    (const struct timespec __user *)fifth);
+	default:
+		return sys_ipc(call, first, second, third, ptr, fifth);
+	}
+}
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 93cfd3ffcc7..10235b01582 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -404,7 +404,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
 	struct thread_info *thread = current_thread_info();
 	siginfo_t info;
 
-	if ((no >> 16) != 0x9f)
+	if ((no >> 16) != (__ARM_NR_BASE>> 16))
 		return bad_syscall(no, regs);
 
 	switch (no & 0xffff) {