On Tue, 8 Feb 2005 at 18:27:08 -0800, Linus Torvalds wrote:
> +/*
> + * Strange magic calling convention: pointer in %ecx,
> + * value in %eax(:%edx), return value in %eax, no clobbers.
> + */
> +extern void __put_user_1(void);
> +extern void __put_user_2(void);
> +extern void __put_user_4(void);
> +extern void __put_user_8(void);
> +
> +#define __put_user_1(x, ptr) __asm__ __volatile__("call __put_user_1":"=a"
> (__ret_pu):"0" ((typeof(*(ptr)))(x)), "c" (ptr))
> +#define __put_user_2(x, ptr) __asm__ __volatile__("call __put_user_2":"=a"
> (__ret_pu):"0" ((typeof(*(ptr)))(x)), "c" (ptr))
> +#define __put_user_4(x, ptr) __asm__ __volatile__("call __put_user_4":"=a"
> (__ret_pu):"0" ((typeof(*(ptr)))(x)), "c" (ptr))
> +#define __put_user_8(x, ptr) __asm__ __volatile__("call __put_user_8":"=a"
> (__ret_pu):"A" ((typeof(*(ptr)))(x)), "c" (ptr))
> +#define __put_user_X(x, ptr) __asm__ __volatile__("call __put_user_X":"=a"
> (__ret_pu):"c" (ptr))
> +
Should "cc" be on the clobber list since all the called functions alter
EFLAGS?
And in any case is it too much to ask for an 80-column limit? ;)
#define __put_user_1(x, ptr) \
__asm__ __volatile__( \
"call __put_user_1" \
: "=a" (__ret_pu) \
: "0" ((typeof(*(ptr)))(x)), "c" (ptr) \
: "cc")
#define __put_user_2(x, ptr) \
__asm__ __volatile__( \
"call __put_user_2" \
: "=a" (__ret_pu) \
: "0" ((typeof(*(ptr)))(x)), "c" (ptr) \
: "cc")
#define __put_user_4(x, ptr) \
__asm__ __volatile__( \
"call __put_user_4" \
: "=a" (__ret_pu) \
: "0" ((typeof(*(ptr)))(x)), "c" (ptr) \
: "cc")
#define __put_user_8(x, ptr) \
__asm__ __volatile__( \
"call __put_user_8" \
: "=a" (__ret_pu) \
: "A" ((typeof(*(ptr)))(x)), "c" (ptr) \
: "cc")
#define __put_user_X(x, ptr) \
__asm__ __volatile__( \
"call __put_user_X" \
: "=a" (__ret_pu) \
: "c" (ptr) \
: "cc")
--
Chuck
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