我在Linux内核代码中找到了这个:http://gitorious.org/pandroid/kernel-omap/blobs/5ed7607d45b300a37dd13ad1c79adea56f6687ce/arch/arm/mach-omap2/board-omap4panda.c
该链接指向的是OMAP4 Panda开发板的驱动程序。MACHINE_START(OMAP4_PANDA, "OMAP4430 Panda Board")
.phys_io = 0x48000000,
.io_pg_offst = ((0xfa000000) >> 18) & 0xfffc,
.boot_params = 0x80000100,
.map_io = omap_panda_map_io,
.init_irq = omap_panda_init_irq,
.init_machine = omap_panda_init,
.timer = &omap_timer,
MACHINE_END
我不明白这是什么?这是一个宏还是结构体或其他什么东西..??
定义如下:
/*
* Set of macros to define architecture features. This is built into
* a table by the linker.
*/
#define MACHINE_START(_type,_name) \
static const struct machine_desc __mach_desc_##_type \
__used \
__attribute__((__section__(".arch.info.init"))) = { \
.nr = MACH_TYPE_##_type, \
.name = _name,
#define MACHINE_END \
};
#endif
但我不明白它是如何工作的?
gcc -C -E
替换gcc
,然后你就可以在 stdout 上获得预处理形式了。 - Basile Starynkevitch