arch/arm/kernel/entry-common.S - SHIFTPHONES/mainline/linux - Gitiles

 /*
  *  linux/arch/arm/kernel/entry-common.S
  *
  *  Copyright (C) 2000 Russell King
  *
  * 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.
  */

 #include <asm/assembler.h>
 #include <asm/unistd.h>
 #include <asm/ftrace.h>
 #include <asm/unwind.h>

 #ifdef CONFIG_NEED_RET_TO_USER
 #include <mach/entry-macro.S>
 #else
 	.macro  arch_ret_to_user, tmp1, tmp2
 	.endm
 #endif

 #include "entry-header.S"


 	.align	5
 /*
  * This is the fast syscall return path.  We do as little as
  * possible here, and this includes saving r0 back into the SVC
  * stack.
  */
 ret_fast_syscall:
  UNWIND(.fnstart	)
  UNWIND(.cantunwind	)
 	disable_irq				@ disable interrupts
 	ldr	r1, [tsk, #TI_FLAGS]		@ re-check for syscall tracing
 	tst	r1, #_TIF_SYSCALL_WORK
 	bne	__sys_trace_return
 	tst	r1, #_TIF_WORK_MASK
 	bne	fast_work_pending
 	asm_trace_hardirqs_on

 	/* perform architecture specific actions before user return */
 	arch_ret_to_user r1, lr
 	ct_user_enter

 	restore_user_regs fast = 1, offset = S_OFF
  UNWIND(.fnend		)

 /*
  * Ok, we need to do extra processing, enter the slow path.
  */
 fast_work_pending:
 	str	r0, [sp, #S_R0+S_OFF]!		@ returned r0
 work_pending:
 	mov	r0, sp				@ 'regs'
 	mov	r2, why				@ 'syscall'
 	bl	do_work_pending
 	cmp	r0, #0
 	beq	no_work_pending
 	movlt	scno, #(__NR_restart_syscall - __NR_SYSCALL_BASE)
 	ldmia	sp, {r0 - r6}			@ have to reload r0 - r6
 	b	local_restart			@ ... and off we go

 /*
  * "slow" syscall return path.  "why" tells us if this was a real syscall.
  */
 ENTRY(ret_to_user)
 ret_slow_syscall:
 	disable_irq				@ disable interrupts
 ENTRY(ret_to_user_from_irq)
 	ldr	r1, [tsk, #TI_FLAGS]
 	tst	r1, #_TIF_WORK_MASK
 	bne	work_pending
 no_work_pending:
 	asm_trace_hardirqs_on

 	/* perform architecture specific actions before user return */
 	arch_ret_to_user r1, lr
 	ct_user_enter save = 0

 	restore_user_regs fast = 0, offset = 0
 ENDPROC(ret_to_user_from_irq)
 ENDPROC(ret_to_user)

 /*
  * This is how we return from a fork.
  */
 ENTRY(ret_from_fork)
 	bl	schedule_tail
 	cmp	r5, #0
 	movne	r0, r4
 	adrne	lr, BSYM(1f)
 	retne	r5
 1:	get_thread_info tsk
 	b	ret_slow_syscall
 ENDPROC(ret_from_fork)

 	.equ NR_syscalls,0
 #define CALL(x) .equ NR_syscalls,NR_syscalls+1
 #include "calls.S"

 /*
  * Ensure that the system call table is equal to __NR_syscalls,
  * which is the value the rest of the system sees
  */
 .ifne NR_syscalls - __NR_syscalls
 .error "__NR_syscalls is not equal to the size of the syscall table"
 .endif

 #undef CALL
 #define CALL(x) .long x

 /*=============================================================================
  * SWI handler
  *-----------------------------------------------------------------------------
  */

 	.align	5
 ENTRY(vector_swi)
 #ifdef CONFIG_CPU_V7M
 	v7m_exception_entry
 #else
 	sub	sp, sp, #S_FRAME_SIZE
 	stmia	sp, {r0 - r12}			@ Calling r0 - r12
  ARM(	add	r8, sp, #S_PC		)
  ARM(	stmdb	r8, {sp, lr}^		)	@ Calling sp, lr
  THUMB(	mov	r8, sp			)
  THUMB(	store_user_sp_lr r8, r10, S_SP	)	@ calling sp, lr
 	mrs	r8, spsr			@ called from non-FIQ mode, so ok.
 	str	lr, [sp, #S_PC]			@ Save calling PC
 	str	r8, [sp, #S_PSR]		@ Save CPSR
 	str	r0, [sp, #S_OLD_R0]		@ Save OLD_R0
 #endif
 	zero_fp
 	alignment_trap r10, ip, __cr_alignment
 	enable_irq
 	ct_user_exit
 	get_thread_info tsk

 	/*
 	 * 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
  USER(	ldreq	r10, [lr, #-4]		)	@ get SWI instruction
 #else
  USER(	ldr	r10, [lr, #-4]		)	@ get SWI instruction
 #endif
  ARM_BE8(rev	r10, r10)			@ little endian instruction

 #elif defined(CONFIG_AEABI)

 	/*
 	 * Pure EABI user space always put syscall number into scno (r7).
 	 */
 #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
  USER(	ldreq	scno, [lr, #-4]		)

 #else
 	/* Legacy ABI only. */
  USER(	ldr	scno, [lr, #-4]		)	@ get SWI instruction
 #endif

 	adr	tbl, sys_call_table		@ load syscall table pointer

 #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
 #endif

 local_restart:
 	ldr	r10, [tsk, #TI_FLAGS]		@ check for syscall tracing
 	stmdb	sp!, {r4, r5}			@ push fifth and sixth args

 	tst	r10, #_TIF_SYSCALL_WORK		@ are we tracing syscalls?
 	bne	__sys_trace

 	cmp	scno, #NR_syscalls		@ check upper syscall limit
 	adr	lr, BSYM(ret_fast_syscall)	@ return address
 	ldrcc	pc, [tbl, scno, lsl #2]		@ call sys_* routine

 	add	r1, sp, #S_OFF
 2:	cmp	scno, #(__ARM_NR_BASE - __NR_SYSCALL_BASE)
 	eor	r0, scno, #__NR_SYSCALL_BASE	@ put OS number back
 	bcs	arm_syscall
 	mov	why, #0				@ no longer a real syscall
 	b	sys_ni_syscall			@ not private func

 #if defined(CONFIG_OABI_COMPAT) || !defined(CONFIG_AEABI)
 	/*
 	 * We failed to handle a fault trying to access the page
 	 * containing the swi instruction, but we're not really in a
 	 * position to return -EFAULT. Instead, return back to the
 	 * instruction and re-enter the user fault handling path trying
 	 * to page it in. This will likely result in sending SEGV to the
 	 * current task.
 	 */
 9001:
 	sub	lr, lr, #4
 	str	lr, [sp, #S_PC]
 	b	ret_fast_syscall
 #endif
 ENDPROC(vector_swi)

 	/*
 	 * This is the really slow path.  We're going to be doing
 	 * context switches, and waiting for our parent to respond.
 	 */
 __sys_trace:
 	mov	r1, scno
 	add	r0, sp, #S_OFF
 	bl	syscall_trace_enter

 	adr	lr, BSYM(__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 - r6}			@ have to reload r0 - r6
 	stmccia	sp, {r4, r5}			@ and update the stack args
 	ldrcc	pc, [tbl, scno, lsl #2]		@ call sys_* routine
 	cmp	scno, #-1			@ skip the syscall?
 	bne	2b
 	add	sp, sp, #S_OFF			@ restore stack
 	b	ret_slow_syscall

 __sys_trace_return:
 	str	r0, [sp, #S_R0 + S_OFF]!	@ save returned r0
 	mov	r0, sp
 	bl	syscall_trace_exit
 	b	ret_slow_syscall

 	.align	5
 #ifdef CONFIG_ALIGNMENT_TRAP
 	.type	__cr_alignment, #object
 __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
  */
 @ r0 = syscall number
 @ r8 = syscall table
 sys_syscall:
 		bic	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
 		movlo	r0, r1
 		movlo	r1, r2
 		movlo	r2, r3
 		movlo	r3, r4
 		ldrlo	pc, [tbl, scno, lsl #2]
 		b	sys_ni_syscall
 ENDPROC(sys_syscall)

 sys_sigreturn_wrapper:
 		add	r0, sp, #S_OFF
 		mov	why, #0		@ prevent syscall restart handling
 		b	sys_sigreturn
 ENDPROC(sys_sigreturn_wrapper)

 sys_rt_sigreturn_wrapper:
 		add	r0, sp, #S_OFF
 		mov	why, #0		@ prevent syscall restart handling
 		b	sys_rt_sigreturn
 ENDPROC(sys_rt_sigreturn_wrapper)

 sys_statfs64_wrapper:
 		teq	r1, #88
 		moveq	r1, #84
 		b	sys_statfs64
 ENDPROC(sys_statfs64_wrapper)

 sys_fstatfs64_wrapper:
 		teq	r1, #88
 		moveq	r1, #84
 		b	sys_fstatfs64
 ENDPROC(sys_fstatfs64_wrapper)

 /*
  * Note: off_4k (r5) is always units of 4K.  If we can't do the requested
  * offset, we return EINVAL.
  */
 sys_mmap2:
 #if PAGE_SHIFT > 12
 		tst	r5, #PGOFF_MASK
 		moveq	r5, r5, lsr #PAGE_SHIFT - 12
 		streq	r5, [sp, #4]
 		beq	sys_mmap_pgoff
 		mov	r0, #-EINVAL
 		ret	lr
 #else
 		str	r5, [sp, #4]
 		b	sys_mmap_pgoff
 #endif
 ENDPROC(sys_mmap2)

 #ifdef CONFIG_OABI_COMPAT

 /*
  * These are syscalls with argument register differences
  */

 sys_oabi_pread64:
 		stmia	sp, {r3, r4}
 		b	sys_pread64
 ENDPROC(sys_oabi_pread64)

 sys_oabi_pwrite64:
 		stmia	sp, {r3, r4}
 		b	sys_pwrite64
 ENDPROC(sys_oabi_pwrite64)

 sys_oabi_truncate64:
 		mov	r3, r2
 		mov	r2, r1
 		b	sys_truncate64
 ENDPROC(sys_oabi_truncate64)

 sys_oabi_ftruncate64:
 		mov	r3, r2
 		mov	r2, r1
 		b	sys_ftruncate64
 ENDPROC(sys_oabi_ftruncate64)

 sys_oabi_readahead:
 		str	r3, [sp]
 		mov	r3, r2
 		mov	r2, r1
 		b	sys_readahead
 ENDPROC(sys_oabi_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
	/*
	* linux/arch/arm/kernel/entry-common.S
	*
	* Copyright (C) 2000 Russell King
	*
	* 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.
	*/

	#include <asm/assembler.h>
	#include <asm/unistd.h>
	#include <asm/ftrace.h>
	#include <asm/unwind.h>

	#ifdef CONFIG_NEED_RET_TO_USER
	#include <mach/entry-macro.S>
	#else
	.macro arch_ret_to_user, tmp1, tmp2
	.endm
	#endif

	#include "entry-header.S"


	.align 5
	/*
	* This is the fast syscall return path. We do as little as
	* possible here, and this includes saving r0 back into the SVC
	* stack.
	*/
	ret_fast_syscall:
	UNWIND(.fnstart )
	UNWIND(.cantunwind )
	disable_irq @ disable interrupts
	ldr r1, [tsk, #TI_FLAGS] @ re-check for syscall tracing
	tst r1, #_TIF_SYSCALL_WORK
	bne __sys_trace_return
	tst r1, #_TIF_WORK_MASK
	bne fast_work_pending
	asm_trace_hardirqs_on

	/* perform architecture specific actions before user return */
	arch_ret_to_user r1, lr
	ct_user_enter

	restore_user_regs fast = 1, offset = S_OFF
	UNWIND(.fnend )

	/*
	* Ok, we need to do extra processing, enter the slow path.
	*/
	fast_work_pending:
	str r0, [sp, #S_R0+S_OFF]! @ returned r0
	work_pending:
	mov r0, sp @ 'regs'
	mov r2, why @ 'syscall'
	bl do_work_pending
	cmp r0, #0
	beq no_work_pending
	movlt scno, #(__NR_restart_syscall - __NR_SYSCALL_BASE)
	ldmia sp, {r0 - r6} @ have to reload r0 - r6
	b local_restart @ ... and off we go

	/*
	* "slow" syscall return path. "why" tells us if this was a real syscall.
	*/
	ENTRY(ret_to_user)
	ret_slow_syscall:
	disable_irq @ disable interrupts
	ENTRY(ret_to_user_from_irq)
	ldr r1, [tsk, #TI_FLAGS]
	tst r1, #_TIF_WORK_MASK
	bne work_pending
	no_work_pending:
	asm_trace_hardirqs_on

	/* perform architecture specific actions before user return */
	arch_ret_to_user r1, lr
	ct_user_enter save = 0

	restore_user_regs fast = 0, offset = 0
	ENDPROC(ret_to_user_from_irq)
	ENDPROC(ret_to_user)

	/*
	* This is how we return from a fork.
	*/
	ENTRY(ret_from_fork)
	bl schedule_tail
	cmp r5, #0
	movne r0, r4
	adrne lr, BSYM(1f)
	retne r5
	1: get_thread_info tsk
	b ret_slow_syscall
	ENDPROC(ret_from_fork)

	.equ NR_syscalls,0
	#define CALL(x) .equ NR_syscalls,NR_syscalls+1
	#include "calls.S"

	/*
	* Ensure that the system call table is equal to __NR_syscalls,
	* which is the value the rest of the system sees
	*/
	.ifne NR_syscalls - __NR_syscalls
	.error "__NR_syscalls is not equal to the size of the syscall table"
	.endif

	#undef CALL
	#define CALL(x) .long x

	/*=============================================================================
	* SWI handler
	*-----------------------------------------------------------------------------
	*/

	.align 5
	ENTRY(vector_swi)
	#ifdef CONFIG_CPU_V7M
	v7m_exception_entry
	#else
	sub sp, sp, #S_FRAME_SIZE
	stmia sp, {r0 - r12} @ Calling r0 - r12
	ARM( add r8, sp, #S_PC )
	ARM( stmdb r8, {sp, lr}^ ) @ Calling sp, lr
	THUMB( mov r8, sp )
	THUMB( store_user_sp_lr r8, r10, S_SP ) @ calling sp, lr
	mrs r8, spsr @ called from non-FIQ mode, so ok.
	str lr, [sp, #S_PC] @ Save calling PC
	str r8, [sp, #S_PSR] @ Save CPSR
	str r0, [sp, #S_OLD_R0] @ Save OLD_R0
	#endif
	zero_fp
	alignment_trap r10, ip, __cr_alignment
	enable_irq
	ct_user_exit
	get_thread_info tsk

	/*
	* 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
	USER( ldreq r10, [lr, #-4] ) @ get SWI instruction
	#else
	USER( ldr r10, [lr, #-4] ) @ get SWI instruction
	#endif
	ARM_BE8(rev r10, r10) @ little endian instruction

	#elif defined(CONFIG_AEABI)

	/*
	* Pure EABI user space always put syscall number into scno (r7).
	*/
	#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
	USER( ldreq scno, [lr, #-4] )

	#else
	/* Legacy ABI only. */
	USER( ldr scno, [lr, #-4] ) @ get SWI instruction
	#endif

	adr tbl, sys_call_table @ load syscall table pointer

	#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
	#endif

	local_restart:
	ldr r10, [tsk, #TI_FLAGS] @ check for syscall tracing
	stmdb sp!, {r4, r5} @ push fifth and sixth args

	tst r10, #_TIF_SYSCALL_WORK @ are we tracing syscalls?
	bne __sys_trace

	cmp scno, #NR_syscalls @ check upper syscall limit
	adr lr, BSYM(ret_fast_syscall) @ return address
	ldrcc pc, [tbl, scno, lsl #2] @ call sys_* routine

	add r1, sp, #S_OFF
	2: cmp scno, #(__ARM_NR_BASE - __NR_SYSCALL_BASE)
	eor r0, scno, #__NR_SYSCALL_BASE @ put OS number back
	bcs arm_syscall
	mov why, #0 @ no longer a real syscall
	b sys_ni_syscall @ not private func

	#if defined(CONFIG_OABI_COMPAT) \|\| !defined(CONFIG_AEABI)
	/*
	* We failed to handle a fault trying to access the page
	* containing the swi instruction, but we're not really in a
	* position to return -EFAULT. Instead, return back to the
	* instruction and re-enter the user fault handling path trying
	* to page it in. This will likely result in sending SEGV to the
	* current task.
	*/
	9001:
	sub lr, lr, #4
	str lr, [sp, #S_PC]
	b ret_fast_syscall
	#endif
	ENDPROC(vector_swi)

	/*
	* This is the really slow path. We're going to be doing
	* context switches, and waiting for our parent to respond.
	*/
	__sys_trace:
	mov r1, scno
	add r0, sp, #S_OFF
	bl syscall_trace_enter

	adr lr, BSYM(__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 - r6} @ have to reload r0 - r6
	stmccia sp, {r4, r5} @ and update the stack args
	ldrcc pc, [tbl, scno, lsl #2] @ call sys_* routine
	cmp scno, #-1 @ skip the syscall?
	bne 2b
	add sp, sp, #S_OFF @ restore stack
	b ret_slow_syscall

	__sys_trace_return:
	str r0, [sp, #S_R0 + S_OFF]! @ save returned r0
	mov r0, sp
	bl syscall_trace_exit
	b ret_slow_syscall

	.align 5
	#ifdef CONFIG_ALIGNMENT_TRAP
	.type __cr_alignment, #object
	__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
	*/
	@ r0 = syscall number
	@ r8 = syscall table
	sys_syscall:
	bic 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
	movlo r0, r1
	movlo r1, r2
	movlo r2, r3
	movlo r3, r4
	ldrlo pc, [tbl, scno, lsl #2]
	b sys_ni_syscall
	ENDPROC(sys_syscall)

	sys_sigreturn_wrapper:
	add r0, sp, #S_OFF
	mov why, #0 @ prevent syscall restart handling
	b sys_sigreturn
	ENDPROC(sys_sigreturn_wrapper)

	sys_rt_sigreturn_wrapper:
	add r0, sp, #S_OFF
	mov why, #0 @ prevent syscall restart handling
	b sys_rt_sigreturn
	ENDPROC(sys_rt_sigreturn_wrapper)

	sys_statfs64_wrapper:
	teq r1, #88
	moveq r1, #84
	b sys_statfs64
	ENDPROC(sys_statfs64_wrapper)

	sys_fstatfs64_wrapper:
	teq r1, #88
	moveq r1, #84
	b sys_fstatfs64
	ENDPROC(sys_fstatfs64_wrapper)

	/*
	* Note: off_4k (r5) is always units of 4K. If we can't do the requested
	* offset, we return EINVAL.
	*/
	sys_mmap2:
	#if PAGE_SHIFT > 12
	tst r5, #PGOFF_MASK
	moveq r5, r5, lsr #PAGE_SHIFT - 12
	streq r5, [sp, #4]
	beq sys_mmap_pgoff
	mov r0, #-EINVAL
	ret lr
	#else
	str r5, [sp, #4]
	b sys_mmap_pgoff
	#endif
	ENDPROC(sys_mmap2)

	#ifdef CONFIG_OABI_COMPAT

	/*
	* These are syscalls with argument register differences
	*/

	sys_oabi_pread64:
	stmia sp, {r3, r4}
	b sys_pread64
	ENDPROC(sys_oabi_pread64)

	sys_oabi_pwrite64:
	stmia sp, {r3, r4}
	b sys_pwrite64
	ENDPROC(sys_oabi_pwrite64)

	sys_oabi_truncate64:
	mov r3, r2
	mov r2, r1
	b sys_truncate64
	ENDPROC(sys_oabi_truncate64)

	sys_oabi_ftruncate64:
	mov r3, r2
	mov r2, r1
	b sys_ftruncate64
	ENDPROC(sys_oabi_ftruncate64)

	sys_oabi_readahead:
	str r3, [sp]
	mov r3, r2
	mov r2, r1
	b sys_readahead
	ENDPROC(sys_oabi_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