Script started on Fri Nov 04 09:41:09 2005
+++CMD+++> cat foo.c
typedef unsigned short uint16_t;

struct foo_reg {
	uint16_t leds;		/**< The 16 LEDs on the side of the board. */
	uint16_t id_eaprom;	/**< The ID EAPROM. */
	uint16_t control;	/**< The control register. */
	uint16_t pad0;
} __attribute__((__packed__));

void foo(void);

void foo(void) {
	volatile struct foo_reg *fp = (volatile struct foo_reg *)0x9fff9800;
	fp->control = 0x00ff;
}
+++CMD+++> powerpc-rtems-gcc -O -c foo.c
+++CMD+++> powerpc-rtems-objdump --disassemble --source foo.o

foo.o:     file format elf32-powerpc

Disassembly of section .text:

00000000 <foo>:
   0:	3d 20 9f ff 	lis     r9,-24577
   4:	61 29 98 00 	ori     r9,r9,38912
   8:	38 00 00 ff 	li      r0,255
   c:	b0 09 00 04 	sth     r0,4(r9)
  10:	4e 80 00 20 	blr
+++CMD+++> powerpc-rtems-gcc -O -mstrict-align -c foo.c
+++CMD+++> powerpc-rtems-objdump --disassemble --source foo.o

foo.o:     file format elf32-powerpc

Disassembly of section .text:

00000000 <foo>:
   0:	3d 20 9f ff 	lis     r9,-24577
   4:	61 29 98 00 	ori     r9,r9,38912
   8:	88 09 00 04 	lbz     r0,4(r9)
   c:	38 00 00 00 	li      r0,0
  10:	98 09 00 04 	stb     r0,4(r9)
  14:	88 09 00 05 	lbz     r0,5(r9)
  18:	38 00 ff ff 	li      r0,-1
  1c:	98 09 00 05 	stb     r0,5(r9)
  20:	4e 80 00 20 	blr
+++CMD+++> 
script done on Fri Nov 04 09:41:58 2005