On 14/11/10 16:10, Graeme Russ wrote:
On 13/11/10 22:18, Graeme Russ wrote:
On 13/11/10 19:20, Albert ARIBAUD wrote:
Le 13/11/2010 05:16, Graeme Russ a écrit :
static inline void *get_gd_ptr(void) { void *gd_ptr;
asm volatile("gs mov 0, %0\n" : "=r" (gd_ptr)); return gd_ptr; }
static inline gd_t *get_gd_ptr(void) { gd_t *gd_ptr;
asm volatile("fs mov 0, %0\n" : "=r" (gd_ptr)); return gd_ptr; }
works a treat :)
Is there any reason the other arches could not implement an inline function as well? ARM for example:
-#define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("r8")
+static inline gd_t *gd(void) +{ + gd_t *gd_ptr; + + asm volatile("mov r8, %0\n" : "=r" (gd_ptr)); + return gd_ptr; +}
Is the compiler smart enough to optimise out and not increase code size?
If so, all the arches can have identical implementations for using global data
Regards,
Graeme