256 lines
8.0 KiB
C
256 lines
8.0 KiB
C
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/* GNU C varargs support for the PowerPC with either the V.4 or Windows NT calling sequences */
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#ifndef _WIN32
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/* System V.4 support */
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/* Define __gnuc_va_list. */
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#ifndef __GNUC_VA_LIST
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#define __GNUC_VA_LIST
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#ifndef _SYS_VA_LIST_H
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#define _SYS_VA_LIST_H /* Solaris sys/va_list.h */
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/* Solaris decided to rename overflow_arg_area to input_arg_area,
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so handle it via a macro. */
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#define __va_overflow(AP) (AP)->overflow_arg_area
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/* Note that the names in this structure are in the user's namespace, but
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that the V.4 abi explicitly states that these names should be used. */
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typedef struct __va_list_tag {
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unsigned char gpr; /* index into the array of 8 GPRs stored in the
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register save area gpr=0 corresponds to r3,
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gpr=1 to r4, etc. */
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unsigned char fpr; /* index into the array of 8 FPRs stored in the
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register save area fpr=0 corresponds to f1,
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fpr=1 to f2, etc. */
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char *overflow_arg_area; /* location on stack that holds the next
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overflow argument */
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char *reg_save_area; /* where r3:r10 and f1:f8, if saved are stored */
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} __va_list[1], __gnuc_va_list[1];
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#else /* _SYS_VA_LIST */
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typedef __va_list __gnuc_va_list;
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#define __va_overflow(AP) (AP)->input_arg_area
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#endif /* not _SYS_VA_LIST */
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#endif /* not __GNUC_VA_LIST */
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/* If this is for internal libc use, don't define anything but
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__gnuc_va_list. */
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#if defined (_STDARG_H) || defined (_VARARGS_H)
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/* Register save area located below the frame pointer */
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#ifndef __VA_PPC_H__
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#define __VA_PPC_H__
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typedef struct {
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long __gp_save[8]; /* save area for GP registers */
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double __fp_save[8]; /* save area for FP registers */
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} __va_regsave_t;
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/* Macros to access the register save area */
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/* We cast to void * and then to TYPE * because this avoids
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a warning about increasing the alignment requirement. */
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#define __VA_FP_REGSAVE(AP,OFS,TYPE) \
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((TYPE *) (void *) (&(((__va_regsave_t *) \
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(AP)->reg_save_area)->__fp_save[OFS])))
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#define __VA_GP_REGSAVE(AP,OFS,TYPE) \
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((TYPE *) (void *) (&(((__va_regsave_t *) \
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(AP)->reg_save_area)->__gp_save[OFS])))
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/* Common code for va_start for both varargs and stdarg. We allow all
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the work to be done by __builtin_saveregs. It returns a pointer to
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a va_list that was constructed on the stack; we must simply copy it
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to the user's variable. */
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#define __va_start_common(AP, FAKE) \
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__builtin_memcpy ((AP), __builtin_saveregs (), sizeof(__gnuc_va_list))
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#ifdef _STDARG_H /* stdarg.h support */
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/* Calling __builtin_next_arg gives the proper error message if LASTARG is
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not indeed the last argument. */
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#define va_start(AP,LASTARG) \
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(__builtin_next_arg (LASTARG), __va_start_common (AP, 0))
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#else /* varargs.h support */
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#define va_start(AP) __va_start_common (AP, 1)
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#define va_alist __va_1st_arg
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#define va_dcl register int va_alist; ...
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#endif /* _STDARG_H */
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#ifdef _SOFT_FLOAT
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#define __va_float_p(TYPE) 0
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#else
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#define __va_float_p(TYPE) (__builtin_classify_type(*(TYPE *)0) == 8)
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#endif
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#define __va_aggregate_p(TYPE) (__builtin_classify_type(*(TYPE *)0) >= 12)
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#define __va_size(TYPE) ((sizeof(TYPE) + sizeof (long) - 1) / sizeof (long))
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/* This symbol isn't defined. It is used to flag type promotion violations
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at link time. We can only do this when optimizing. Use __builtin_trap
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instead of abort so that we don't require a prototype for abort.
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__builtin_trap stuff is not available on the gcc-2.95 branch, so we just
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avoid calling it for now. */
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#ifdef __OPTIMIZE__
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extern void __va_arg_type_violation(void) __attribute__((__noreturn__));
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#else
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#define __va_arg_type_violation()
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#endif
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#define va_arg(AP,TYPE) \
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__extension__ (*({ \
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register TYPE *__ptr; \
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\
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if (__va_float_p (TYPE) && sizeof (TYPE) < 16) \
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{ \
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unsigned char __fpr = (AP)->fpr; \
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if (__fpr < 8) \
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{ \
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__ptr = __VA_FP_REGSAVE (AP, __fpr, TYPE); \
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(AP)->fpr = __fpr + 1; \
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} \
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else if (sizeof (TYPE) == 8) \
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{ \
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unsigned long __addr = (unsigned long) (__va_overflow (AP)); \
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__ptr = (TYPE *)((__addr + 7) & -8); \
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__va_overflow (AP) = (char *)(__ptr + 1); \
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} \
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else \
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{ \
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/* float is promoted to double. */ \
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__va_arg_type_violation (); \
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} \
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} \
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\
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/* Aggregates and long doubles are passed by reference. */ \
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else if (__va_aggregate_p (TYPE) || __va_float_p (TYPE)) \
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{ \
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unsigned char __gpr = (AP)->gpr; \
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if (__gpr < 8) \
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{ \
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__ptr = * __VA_GP_REGSAVE (AP, __gpr, TYPE *); \
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(AP)->gpr = __gpr + 1; \
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} \
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else \
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{ \
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TYPE **__pptr = (TYPE **) (__va_overflow (AP)); \
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__ptr = * __pptr; \
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__va_overflow (AP) = (char *) (__pptr + 1); \
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} \
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} \
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\
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/* Only integrals remaining. */ \
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else \
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{ \
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/* longlong is aligned. */ \
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if (sizeof (TYPE) == 8) \
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{ \
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unsigned char __gpr = (AP)->gpr; \
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if (__gpr < 7) \
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{ \
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__gpr += __gpr & 1; \
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__ptr = __VA_GP_REGSAVE (AP, __gpr, TYPE); \
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(AP)->gpr = __gpr + 2; \
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} \
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else \
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{ \
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unsigned long __addr = (unsigned long) (__va_overflow (AP)); \
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__ptr = (TYPE *)((__addr + 7) & -8); \
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(AP)->gpr = 8; \
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__va_overflow (AP) = (char *)(__ptr + 1); \
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} \
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} \
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else if (sizeof (TYPE) == 4) \
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{ \
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unsigned char __gpr = (AP)->gpr; \
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if (__gpr < 8) \
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{ \
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__ptr = __VA_GP_REGSAVE (AP, __gpr, TYPE); \
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(AP)->gpr = __gpr + 1; \
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} \
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else \
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{ \
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__ptr = (TYPE *) __va_overflow (AP); \
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__va_overflow (AP) = (char *)(__ptr + 1); \
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} \
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} \
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else \
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{ \
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/* Everything else was promoted to int. */ \
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__va_arg_type_violation (); \
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} \
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} \
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__ptr; \
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}))
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#define va_end(AP) ((void)0)
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/* Copy __gnuc_va_list into another variable of this type. */
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#define __va_copy(dest, src) *(dest) = *(src)
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#endif /* __VA_PPC_H__ */
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#endif /* defined (_STDARG_H) || defined (_VARARGS_H) */
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#else
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/* Windows NT */
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/* Define __gnuc_va_list. */
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#ifndef __GNUC_VA_LIST
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#define __GNUC_VA_LIST
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typedef char *__gnuc_va_list;
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#endif /* not __GNUC_VA_LIST */
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/* If this is for internal libc use, don't define anything but
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__gnuc_va_list. */
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#if defined (_STDARG_H) || defined (_VARARGS_H)
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#define __va_start_common(AP, LASTARG, FAKE) \
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((__builtin_saveregs ()), ((AP) = ((char *) &LASTARG) + __va_rounded_size (AP)), 0)
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#ifdef _STDARG_H /* stdarg.h support */
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/* Calling __builtin_next_arg gives the proper error message if LASTARG is
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not indeed the last argument. */
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#define va_start(AP,LASTARG) \
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(__builtin_saveregs (), \
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(AP) = __builtin_next_arg (LASTARG), \
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0)
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#else /* varargs.h support */
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#define va_start(AP) \
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(__builtin_saveregs (), \
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(AP) = __builtin_next_arg (__va_1st_arg) - sizeof (int), \
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0)
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#define va_alist __va_1st_arg
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#define va_dcl register int __va_1st_arg; ...
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#endif /* _STDARG_H */
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#define __va_rounded_size(TYPE) ((sizeof (TYPE) + 3) & ~3)
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#define __va_align(AP, TYPE) \
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((((unsigned long)(AP)) + ((sizeof (TYPE) >= 8) ? 7 : 3)) \
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& ~((sizeof (TYPE) >= 8) ? 7 : 3))
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#define va_arg(AP,TYPE) \
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( *(TYPE *)((AP = (char *) (__va_align(AP, TYPE) \
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+ __va_rounded_size(TYPE))) \
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- __va_rounded_size(TYPE)))
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#define va_end(AP) ((void)0)
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/* Copy __gnuc_va_list into another variable of this type. */
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#define __va_copy(dest, src) (dest) = (src)
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#endif /* defined (_STDARG_H) || defined (_VARARGS_H) */
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#endif /* Windows NT */
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