m68k exception nuts

m68k issue with exceptions

Silly issue with m68k never going into exception functions.

m68k.ld

MEMORY
{
    ROM (rx) : ORIGIN = 0x00000000, LENGTH = 0x10000
    RAML (xrw) : ORIGIN = 0x00020000, LENGTH = 0x10000
    RAMH (xrw) : ORIGIN = 0x00030000, LENGTH = 0x10000
}

stack_size = 1024;

_stack_start = ORIGIN(RAML)+LENGTH(RAML)-0x10;
_stack_end = _stack_start - stack_size;

SECTIONS {
  .vectors 0x00 :
  {
    . = ALIGN(4);
    KEEP(*(.vectors))
    . = ALIGN(4);
  } > ROM

  .text 0x400 : {
    . = ALIGN(4);
    *(.text)
    *(.rodata)
    . = ALIGN(4);
  } > ROM

  .data : { *(.data) } > RAML
  .bss :  { *(.bss)  *(COMMON) } > RAML
}

OUTPUT_ARCH(m68k:68000)

Makefile

M68K=m68k-linux-gnu
AS=$(M68K)-as
LD=$(M68K)-ld
COPY=$(M68K)-objcopy
DUMP=$(M68K)-objdump

CPU=-m68000
ASFLAGS=$(CPU) --warn --fatal-warnings
LDFLAGS=-T m68k.ld

EEPROM=AT28C256
PREFIX=m68k-

FMT=binary

SRCS=test.s
OBJS=$(SRCS:.s=.o)
MAIN=test

.PHONY: dump clean

all:	$(MAIN)

.s.o:
	$(AS) $(ASFLAGS) -o $@ $<

$(MAIN): $(OBJS)
	$(LD) $(LDFLAGS) -o $(MAIN).a $(OBJS)
	$(COPY) -O $(FMT) $(MAIN).a $(PREFIX)$(MAIN).bin
	$(COPY) -b 0 -i 2 --interleave-width=1 -O $(FMT) $(MAIN).a $(PREFIX)$(MAIN)-even.bin
	$(COPY) -b 1 -i 2 --interleave-width=1 -O $(FMT) $(MAIN).a $(PREFIX)$(MAIN)-odd.bin

clean:
	rm -f *.o $(PREFIX)$(MAIN)-even.bin $(PREFIX)$(MAIN)-odd.bin $(PREFIX)$(MAIN).bin $(MAIN).a

dump:	$(MAIN)
	$(DUMP) $(CPU) -x -D $(MAIN).a

test.S

/*
 * Memory Map
 * --------------
 * 0x00000-0x0FFFF System ROM
 * 0x10000-0x1FFFF System ROM alias
 * 0X20000-0x2FFFF RAM BANK 1
 * 0x30000-0x3FFFF RAM BANK 2
 * 0x40000-0x40001 UARTS
 * 0x50000-0x500xx CALENDAR INPUT
 * 0x60000-0x600xx CALENDAR/LED OUTPUT
 * 0x70000-0x700xx DIP SWITCH INPUT
 *
 */

.section .vectors, "ax"
.title "Init vectors"
    .long _stack_start
    .long .main
    .long .error        | bus error
    .long .error        | address error
    .long .error        | illegal instruction
    .long .error        | divide by zero
    .long .error        | CHK instruction
    .long .error        | TRAPV instruction
    .long .error        | privilege violation
    .long .error        | trace
    .long .error        | line 1010 emulator
    .long .error        | line 1111 emulator
    .rept 0x03
    .long 0x00000000    | reserved
    .endr
    .long .error        | uninitialised interrupt
    .rept 0x08
    .long 0x00000000    | reserved
    .endr
    .long .error        | spurious interrupt
    .long .error        | int 1
    .long .error        | int 2
    .long .error        | int 3
    .long .error        | int 4
    .long .error        | int 5
    .long .error        | int 6
    .long .error        | int 7
    .long .error        | trap #0
    .long .error        | trap #1
    .long .error        | trap #2
    .long .error        | trap #3
    .long .error        | trap #4
    .long .error        | trap #5
    .long .error        | trap #6
    .long .error        | trap #7
    .long .error        | trap #8
    .long .error        | trap #9
    .long .error        | trap #10
    .long .error        | trap #11
    .long .error        | trap #12
    .long .error        | trap #13
    .long .error        | trap #14
    .long .error        | trap #15
    .rept 0x10
    .long 0x00000000    | reserved
    .endr
    |.rept 0xC0
    |.long .error        | user interrupts
    |.endr

.section .text
.title "Program"

.main:
            lea     _stack_start, %sp
            move.b  #0x0f, 0x60000     | turn on LED

            .word   0x4afc             | illegal instruction so we should get exception
.align 2

.die:        jmp     .die              | useless loop

*************************************************************************
*
*  Exception functions
*
.error:
            move.b  #0x0e, 0x60000     | turn off LED
            rte