129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
/* GNU C varargs and stdargs support for the DEC Alpha. */
|
|
|
|
/* Note: We must use the name __builtin_savregs. GCC attaches special
|
|
significance to that name. In particular, regardless of where in a
|
|
function __builtin_saveregs is called, GCC moves the call up to the
|
|
very start of the function. */
|
|
|
|
/* Define __gnuc_va_list. */
|
|
|
|
#ifndef __GNUC_VA_LIST
|
|
#define __GNUC_VA_LIST
|
|
|
|
/* In VMS, __gnuc_va_list is simply char *; on OSF, it's a structure. */
|
|
|
|
#ifdef __VMS__
|
|
typedef char *__gnuc_va_list;
|
|
#else
|
|
|
|
typedef struct {
|
|
char *__base; /* Pointer to first integer register. */
|
|
int __offset; /* Byte offset of args so far. */
|
|
} __gnuc_va_list;
|
|
#endif
|
|
|
|
#endif /* __GNUC_VA_LIST */
|
|
|
|
/* If this is for internal libc use, don't define anything but
|
|
__gnuc_va_list. */
|
|
|
|
#if !defined(__GNUC_VA_LIST_1) && (defined (_STDARG_H) || defined (_VARARGS_H))
|
|
#define __GNUC_VA_LIST_1
|
|
|
|
#define _VA_LIST
|
|
#define _VA_LIST_
|
|
|
|
typedef __gnuc_va_list va_list;
|
|
|
|
#if !defined(_STDARG_H)
|
|
|
|
/* varargs support */
|
|
#define va_alist __builtin_va_alist
|
|
#define va_dcl int __builtin_va_alist;...
|
|
#ifdef __VMS__
|
|
#define va_start(pvar) ((pvar) = __builtin_saveregs ())
|
|
#else
|
|
#define va_start(pvar) ((pvar) = * (__gnuc_va_list *) __builtin_saveregs ())
|
|
#endif
|
|
|
|
#else /* STDARG.H */
|
|
|
|
/* ANSI alternative. */
|
|
|
|
/* Call __builtin_next_arg even though we aren't using its value, so that
|
|
we can verify that firstarg is correct. */
|
|
|
|
#ifdef __VMS__
|
|
#define va_start(pvar, firstarg) \
|
|
(__builtin_next_arg (firstarg), \
|
|
(pvar) = __builtin_saveregs ())
|
|
#else
|
|
#define va_start(pvar, firstarg) \
|
|
(__builtin_next_arg (firstarg), \
|
|
(pvar) = *(__gnuc_va_list *) __builtin_saveregs ())
|
|
#endif
|
|
|
|
#endif /* _STDARG_H */
|
|
|
|
#define va_end(__va) ((void) 0)
|
|
|
|
/* Values returned by __builtin_classify_type. */
|
|
|
|
enum {
|
|
__no_type_class = -1,
|
|
__void_type_class,
|
|
__integer_type_class,
|
|
__char_type_class,
|
|
__enumeral_type_class,
|
|
__boolean_type_class,
|
|
__pointer_type_class,
|
|
__reference_type_class,
|
|
__offset_type_class,
|
|
__real_type_class,
|
|
__complex_type_class,
|
|
__function_type_class,
|
|
__method_type_class,
|
|
__record_type_class,
|
|
__union_type_class,
|
|
__array_type_class,
|
|
__string_type_class,
|
|
__set_type_class,
|
|
__file_type_class,
|
|
__lang_type_class
|
|
};
|
|
|
|
/* Note that parameters are always aligned at least to a word boundary
|
|
(when passed) regardless of what GCC's __alignof__ operator says. */
|
|
|
|
/* Avoid errors if compiling GCC v2 with GCC v1. */
|
|
#if __GNUC__ == 1
|
|
#define __extension__
|
|
#endif
|
|
|
|
/* Get the size of a type in bytes, rounded up to an integral number
|
|
of words. */
|
|
|
|
#define __va_tsize(__type) \
|
|
(((sizeof (__type) + __extension__ sizeof (long long) - 1) \
|
|
/ __extension__ sizeof (long long)) * __extension__ sizeof (long long))
|
|
|
|
#ifdef __VMS__
|
|
#define va_arg(__va, __type) \
|
|
(*(((__va) += __va_tsize (__type)), \
|
|
(__type *)(void *)((__va) - __va_tsize (__type))))
|
|
|
|
#else
|
|
|
|
#define va_arg(__va, __type) \
|
|
(*(((__va).__offset += __va_tsize (__type)), \
|
|
(__type *)(void *)((__va).__base + (__va).__offset \
|
|
- (((__builtin_classify_type (* (__type *) 0) \
|
|
== __real_type_class) && (__va).__offset <= (6 * 8)) \
|
|
? (6 * 8) + 8 : __va_tsize (__type)))))
|
|
#endif
|
|
|
|
/* Copy __gnuc_va_list into another variable of this type. */
|
|
#define __va_copy(dest, src) (dest) = (src)
|
|
|
|
#endif /* __GNUC_VA_LIST_1 */
|