Bare-metal mod (%) with libgcc (not working)

bootstrap.s

/* We need to set up the stack pointer before C code can run
   This memory address is the end of the on-board 128MB of
   RAM for QEMU versatilepb */
.global _start
_start:
	ldr sp, =0x07FFFFFF
	bl main

kernel.c

#define UART0       ((volatile unsigned int*)0x101f1000)

int main(void) {
	unsigned int task_count = 0;
	unsigned int current_task = 1;

	task_count = 2;
	current_task = (current_task + 1) % task_count; /* This line causes the emulator to hang */
	*UART0 = current_task;
	*UART0 = 0;
	*UART0 = 0;
	*UART0 = 0;
	*UART0 = 0;

	while(1);
	return 0;
}

Makefile

CC=arm-linux-gnueabi-gcc
LD=arm-linux-gnueabi-ld

CFLAGS=-ansi -pedantic -Wall -Wextra -march=armv6 -msoft-float -fPIC -mapcs-frame -marm
LDFLAGS=-N -Ttext=0x10000 -L/usr/lib/gcc/arm-linux-gnueabi/4.6.1/

kernel.elf: bootstrap.o kernel.o

.PHONY: clean

clean:
	$(RM) *.elf *.o

.SUFFIXES: .s .o .elf

.s.o:
	$(CC) $(CFLAGS) -o $@ -c $^

.o.elf:
	$(LD) $(LDFLAGS) -o $@ $^ -'(' -lgcc -lgcc_eh -lc -')'