root@talos:~/jhibbits # cat freestanding.c 
int main(int);

int __start(void) {
  return main(0);
}
root@talos:~/jhibbits # cc -m32 -c -ffreestanding -o freestanding.o freestanding.c
root@talos:~/jhibbits # objdump -dr freestanding.o 

freestanding.o:     file format elf32-powerpc-freebsd

Disassembly of section .text:

00000000 <__start>:
   0:	7c 08 02 a6 	mflr    r0
   4:	90 01 00 04 	stw     r0,4(r1)
   8:	94 21 ff f0 	stwu    r1,-16(r1)
   c:	93 e1 00 0c 	stw     r31,12(r1)
  10:	7c 3f 0b 78 	mr      r31,r1
  14:	38 60 00 00 	li      r3,0
  18:	48 00 00 01 	bl      18 <__start+0x18>
			18: R_PPC_PLTREL24	main
  1c:	80 01 00 14 	lwz     r0,20(r1)
  20:	83 e1 00 0c 	lwz     r31,12(r1)
  24:	38 21 00 10 	addi    r1,r1,16
  28:	7c 08 03 a6 	mtlr    r0
  2c:	4e 80 00 20 	blr