avr32: Fix out-of-range rcalls in large kernels

Replace handcoded rcall instructions with the call pseudo-instruction.
For kernels too far over 1MB the rcall instruction can't reach and
linking will fail.  We already call the final linker with --relax which
converts call pseudo-instructions to the right things anyway.

This fixes

arch/avr32/kernel/built-in.o: In function `syscall_exit_work':
(.ex.text+0x198): relocation truncated to fit: R_AVR32_22H_PCREL against symbol `schedule' defined in .sched.text section in kernel/built-in.o
arch/avr32/kernel/built-in.o: In function `fault_exit_work':
(.ex.text+0x3b6): relocation truncated to fit: R_AVR32_22H_PCREL against symbol `schedule' defined in .sched.text section in kernel/built-in.o

But I'm still left with

arch/avr32/kernel/built-in.o:(.fixup+0x2): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+45a
arch/avr32/kernel/built-in.o:(.fixup+0x8): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+8ea
arch/avr32/kernel/built-in.o:(.fixup+0xe): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+abe
arch/avr32/kernel/built-in.o:(.fixup+0x14): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+ac8
arch/avr32/kernel/built-in.o:(.fixup+0x1a): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+ad2
arch/avr32/kernel/built-in.o:(.fixup+0x20): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+adc
arch/avr32/kernel/built-in.o:(.fixup+0x26): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+ae6
arch/avr32/kernel/built-in.o:(.fixup+0x2c): relocation truncated to fit: R_AVR32_22H_PCREL against `.text'+af0
arch/avr32/kernel/built-in.o:(.fixup+0x32): additional relocation overflows omitted from the output

These are caused by a similar problem with 'rjmp' instructions.
Unfortunately, there's no easy fix for these at the moment since we
don't have a arbitrary-range 'jmp' instruction similar to 'call'.
Signed-off-by: Ben Nizette <bn@niasdigital.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>

arch/avr32/kernel/entry-avr32b.S

@@ -150,10 +150,10 @@ page_not_present:
 	tlbmiss_restore
 	sub	sp, 4
 	stmts	--sp, r0-lr
-	rcall	save_full_context_ex
+	call	save_full_context_ex
 	mfsr	r12, SYSREG_ECR
 	mov	r11, sp
-	rcall	do_page_fault
+	call	do_page_fault
 	rjmp	ret_from_exception
 
 	.align	2
@@ -250,7 +250,7 @@ syscall_badsys:
 
 	.global ret_from_fork
 ret_from_fork:
-	rcall   schedule_tail
+	call   schedule_tail
 
 	/* check for syscall tracing */
 	get_thread_info r0
@@ -261,7 +261,7 @@ ret_from_fork:
 
 syscall_trace_enter:
 	pushm	r8-r12
-	rcall	syscall_trace
+	call	syscall_trace
 	popm	r8-r12
 	rjmp	syscall_trace_cont
 
@@ -269,14 +269,14 @@ syscall_exit_work:
 	bld	r1, TIF_SYSCALL_TRACE
 	brcc	1f
 	unmask_interrupts
-	rcall	syscall_trace
+	call	syscall_trace
 	mask_interrupts
 	ld.w	r1, r0[TI_flags]
 
 1:	bld	r1, TIF_NEED_RESCHED
 	brcc	2f
 	unmask_interrupts
-	rcall	schedule
+	call	schedule
 	mask_interrupts
 	ld.w	r1, r0[TI_flags]
 	rjmp	1b
@@ -287,7 +287,7 @@ syscall_exit_work:
 	unmask_interrupts
 	mov	r12, sp
 	mov	r11, r0
-	rcall	do_notify_resume
+	call	do_notify_resume
 	mask_interrupts
 	ld.w	r1, r0[TI_flags]
 	rjmp	1b
@@ -394,7 +394,7 @@ handle_critical:
 
 	mfsr	r12, SYSREG_ECR
 	mov	r11, sp
-	rcall	do_critical_exception
+	call	do_critical_exception
 
 	/* We should never get here... */
 bad_return:
@@ -407,18 +407,18 @@ bad_return:
 do_bus_error_write:
 	sub	sp, 4
 	stmts	--sp, r0-lr
-	rcall	save_full_context_ex
+	call	save_full_context_ex
 	mov	r11, 1
 	rjmp	1f
 
 do_bus_error_read:
 	sub	sp, 4
 	stmts	--sp, r0-lr
-	rcall	save_full_context_ex
+	call	save_full_context_ex
 	mov	r11, 0
 1:	mfsr	r12, SYSREG_BEAR
 	mov	r10, sp
-	rcall	do_bus_error
+	call	do_bus_error
 	rjmp	ret_from_exception
 
 	.align	1
@@ -433,7 +433,7 @@ do_nmi_ll:
 1:	pushm	r8, r9	/* PC and SR */
 	mfsr	r12, SYSREG_ECR
 	mov	r11, sp
-	rcall	do_nmi
+	call	do_nmi
 	popm	r8-r9
 	mtsr	SYSREG_RAR_NMI, r8
 	tst	r0, r0
@@ -457,29 +457,29 @@ do_nmi_ll:
 handle_address_fault:
 	sub	sp, 4
 	stmts	--sp, r0-lr
-	rcall	save_full_context_ex
+	call	save_full_context_ex
 	mfsr	r12, SYSREG_ECR
 	mov	r11, sp
-	rcall	do_address_exception
+	call	do_address_exception
 	rjmp	ret_from_exception
 
 handle_protection_fault:
 	sub	sp, 4
 	stmts	--sp, r0-lr
-	rcall	save_full_context_ex
+	call	save_full_context_ex
 	mfsr	r12, SYSREG_ECR
 	mov	r11, sp
-	rcall	do_page_fault
+	call	do_page_fault
 	rjmp	ret_from_exception
 
 	.align	1
 do_illegal_opcode_ll:
 	sub	sp, 4
 	stmts	--sp, r0-lr
-	rcall	save_full_context_ex
+	call	save_full_context_ex
 	mfsr	r12, SYSREG_ECR
 	mov	r11, sp
-	rcall	do_illegal_opcode
+	call	do_illegal_opcode
 	rjmp	ret_from_exception
 
 do_dtlb_modified:
@@ -513,11 +513,11 @@ do_dtlb_modified:
 do_fpe_ll:
 	sub	sp, 4
 	stmts	--sp, r0-lr
-	rcall	save_full_context_ex
+	call	save_full_context_ex
 	unmask_interrupts
 	mov	r12, 26
 	mov	r11, sp
-	rcall	do_fpe
+	call	do_fpe
 	rjmp	ret_from_exception
 
 ret_from_exception:
@@ -553,7 +553,7 @@ fault_resume_kernel:
 	lddsp	r4, sp[REG_SR]
 	bld	r4, SYSREG_GM_OFFSET
 	brcs	1f
-	rcall	preempt_schedule_irq
+	call	preempt_schedule_irq
 1:
 #endif
 
@@ -582,7 +582,7 @@ fault_exit_work:
 	bld	r1, TIF_NEED_RESCHED
 	brcc	1f
 	unmask_interrupts
-	rcall	schedule
+	call	schedule
 	mask_interrupts
 	ld.w	r1, r0[TI_flags]
 	rjmp	fault_exit_work
@@ -593,7 +593,7 @@ fault_exit_work:
 	unmask_interrupts
 	mov	r12, sp
 	mov	r11, r0
-	rcall	do_notify_resume
+	call	do_notify_resume
 	mask_interrupts
 	ld.w	r1, r0[TI_flags]
 	rjmp	fault_exit_work
@@ -616,10 +616,10 @@ handle_debug:
 
 .Ldebug_fixup_cont:
 #ifdef CONFIG_TRACE_IRQFLAGS
-	rcall	trace_hardirqs_off
+	call	trace_hardirqs_off
 #endif
 	mov	r12, sp
-	rcall	do_debug
+	call	do_debug
 	mov	sp, r12
 
 	lddsp	r2, sp[REG_SR]
@@ -643,7 +643,7 @@ handle_debug:
 	mtsr	SYSREG_RSR_DBG, r11
 	mtsr	SYSREG_RAR_DBG, r10
 #ifdef CONFIG_TRACE_IRQFLAGS
-	rcall	trace_hardirqs_on
+	call	trace_hardirqs_on
 1:
 #endif
 	ldmts	sp++, r0-lr
@@ -676,7 +676,7 @@ debug_resume_kernel:
 #ifdef CONFIG_TRACE_IRQFLAGS
 	bld	r11, SYSREG_GM_OFFSET
 	brcc	1f
-	rcall	trace_hardirqs_on
+	call	trace_hardirqs_on
 1:
 #endif
 	mfsr	r2, SYSREG_SR
@@ -747,7 +747,7 @@ irq_level\level:
 	mov	r11, sp
 	mov	r12, \level
 
-	rcall	do_IRQ
+	call	do_IRQ
 
 	lddsp	r4, sp[REG_SR]
 	bfextu	r4, r4, SYSREG_M0_OFFSET, 3
@@ -767,7 +767,7 @@ irq_level\level:
 
 1:
 #ifdef CONFIG_TRACE_IRQFLAGS
-	rcall	trace_hardirqs_on
+	call	trace_hardirqs_on
 #endif
 	popm	r8-r9
 	mtsr	rar_int\level, r8
@@ -807,7 +807,7 @@ irq_level\level:
 	lddsp	r4, sp[REG_SR]
 	bld	r4, SYSREG_GM_OFFSET
 	brcs	1b
-	rcall	preempt_schedule_irq
+	call	preempt_schedule_irq
 #endif
 	rjmp	1b
 	.endm

arch/avr32/kernel/syscall-stubs.S

@@ -61,7 +61,7 @@ __sys_execve:
 __sys_mmap2:
 	pushm	lr
 	st.w	--sp, ARG6
-	rcall	sys_mmap2
+	call	sys_mmap2
 	sub	sp, -4
 	popm	pc
 
@@ -70,7 +70,7 @@ __sys_mmap2:
 __sys_sendto:
 	pushm	lr
 	st.w	--sp, ARG6
-	rcall	sys_sendto
+	call	sys_sendto
 	sub	sp, -4
 	popm	pc
 
@@ -79,7 +79,7 @@ __sys_sendto:
 __sys_recvfrom:
 	pushm	lr
 	st.w	--sp, ARG6
-	rcall	sys_recvfrom
+	call	sys_recvfrom
 	sub	sp, -4
 	popm	pc
 
@@ -88,7 +88,7 @@ __sys_recvfrom:
 __sys_pselect6:
 	pushm	lr
 	st.w	--sp, ARG6
-	rcall	sys_pselect6
+	call	sys_pselect6
 	sub	sp, -4
 	popm	pc
 
@@ -97,7 +97,7 @@ __sys_pselect6:
 __sys_splice:
 	pushm	lr
 	st.w	--sp, ARG6
-	rcall	sys_splice
+	call	sys_splice
 	sub	sp, -4
 	popm	pc
 
@@ -106,7 +106,7 @@ __sys_splice:
 __sys_epoll_pwait:
 	pushm	lr
 	st.w	--sp, ARG6
-	rcall	sys_epoll_pwait
+	call	sys_epoll_pwait
 	sub	sp, -4
 	popm	pc
 
@@ -115,6 +115,6 @@ __sys_epoll_pwait:
 __sys_sync_file_range:
 	pushm	lr
 	st.w	--sp, ARG6
-	rcall	sys_sync_file_range
+	call	sys_sync_file_range
 	sub	sp, -4
 	popm	pc

arch/avr32/lib/strnlen_user.S

@@ -48,7 +48,7 @@ adjust_length:
 	lddpc	lr, _task_size
 	sub	r11, lr, r12
 	mov	r9, r11
-	rcall	__strnlen_user
+	call	__strnlen_user
 	cp.w	r12, r9
 	brgt	1f
 	popm	pc