1 /* @(#)fpoff.c 1.20 18/04/09 Copyright 1988-2018 J. Schilling */ 2 /* 3 * Get frame pointer offset 4 * 5 * Copyright (c) 1988-2018 J. Schilling 6 */ 7 /* 8 * The contents of this file are subject to the terms of the 9 * Common Development and Distribution License, Version 1.0 only 10 * (the "License"). You may not use this file except in compliance 11 * with the License. 12 * 13 * See the file CDDL.Schily.txt in this distribution for details. 14 * A copy of the CDDL is also available via the Internet at 15 * http://www.opensource.org/licenses/cddl1.txt 16 * 17 * When distributing Covered Code, include this CDDL HEADER in each 18 * file and include the License file CDDL.Schily.txt from this distribution. 19 */ 20 21 #include <schily/mconfig.h> 22 #include <schily/standard.h> 23 #include <schily/schily.h> 24 25 #if defined(sparc) && defined(__GNUC__) 26 # define FP_OFF 0x10 /* some strange things on sparc gcc */ 27 #else 28 # define FP_OFF 0 29 #endif 30 31 EXPORT void **___fpoff __PR((char *cp)); 32 33 /* 34 * Don't make it static to avoid inline optimization. 35 * 36 * We need this function to fool GCCs check for returning addresses 37 * from outside the functions local address space. 38 */ 39 EXPORT void ** ___fpoff(cp)40___fpoff(cp) 41 char *cp; 42 { 43 long ***lp; 44 45 lp = (long ***)(cp + FP_OFF); 46 lp++; 47 return ((void **)lp); 48 } 49