fibril.h

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00001 /*
00002  * Copyright (c) 2005 Jakub Jermar
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  *
00009  * - Redistributions of source code must retain the above copyright
00010  *   notice, this list of conditions and the following disclaimer.
00011  * - Redistributions in binary form must reproduce the above copyright
00012  *   notice, this list of conditions and the following disclaimer in the
00013  *   documentation and/or other materials provided with the distribution.
00014  * - The name of the author may not be used to endorse or promote products
00015  *   derived from this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
00018  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00019  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
00020  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
00021  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
00022  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00023  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00024  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00025  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
00026  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00027  */
00028 
00035 #ifndef LIBC_sparc64_FIBRIL_H_
00036 #define LIBC_sparc64_FIBRIL_H_
00037 
00038 #include <libarch/stack.h>
00039 #include <sys/types.h>
00040 #include <align.h>
00041 
00042 #define SP_DELTA        (STACK_WINDOW_SAVE_AREA_SIZE + STACK_ARG_SAVE_AREA_SIZE)
00043 
00044 #define context_set(c, _pc, stack, size, ptls) \
00045         do { \
00046                 (c)->pc = ((uintptr_t) _pc) - 8; \
00047                 (c)->sp = ((uintptr_t) stack) + ALIGN_UP((size), \
00048                     STACK_ALIGNMENT) - (STACK_BIAS + SP_DELTA); \
00049                 (c)->fp = -STACK_BIAS; \
00050                 (c)->tp = (uint64_t) ptls; \
00051         } while (0)
00052         
00053 /*
00054  * Save only registers that must be preserved across
00055  * function calls.
00056  */
00057 typedef struct {
00058         uintptr_t sp;           /* %o6 */
00059         uintptr_t pc;           /* %o7 */
00060         uint64_t i0;
00061         uint64_t i1;
00062         uint64_t i2;
00063         uint64_t i3;
00064         uint64_t i4;
00065         uint64_t i5;
00066         uintptr_t fp;           /* %i6 */
00067         uintptr_t i7;
00068         uint64_t l0;
00069         uint64_t l1;
00070         uint64_t l2;
00071         uint64_t l3;
00072         uint64_t l4;
00073         uint64_t l5;
00074         uint64_t l6;
00075         uint64_t l7;
00076         uint64_t tp;            /* %g7 */
00077 } context_t;
00078 
00079 static inline uintptr_t context_get_fp(context_t *ctx)
00080 {
00081         return ctx->sp + STACK_BIAS;
00082 }
00083 
00084 #endif
00085 

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