1 /* src/vm/jit/powerpc/md.c - machine dependent PowerPC functions
3 Copyright (C) 1996-2005 R. Grafl, A. Krall, C. Kruegel, C. Oates,
4 R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
5 C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
6 Institut f. Computersprachen - TU Wien
8 This file is part of CACAO.
10 This program is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2, or (at
13 your option) any later version.
15 This program is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
25 Contact: cacao@complang.tuwien.ac.at
27 Authors: Christian Thalinger
31 $Id: md.c 3752 2005-11-23 00:05:04Z twisti $
40 #include "vm/global.h"
43 /* md_init *********************************************************************
45 Do some machine dependent initialization.
47 *******************************************************************************/
55 /* md_stacktrace_get_returnaddress *********************************************
57 Returns the return address of the current stackframe, specified by
58 the passed stack pointer and the stack frame size.
60 *******************************************************************************/
62 u1 *md_stacktrace_get_returnaddress(u1 *sp, u4 framesize)
66 /* on PowerPC the return address is located in the linkage area */
68 ra = *((u1 **) (sp + framesize + LA_LR_OFFSET));
74 /* md_codegen_findmethod *******************************************************
79 39abffe0 addi r13,r11,-32
81 *******************************************************************************/
83 u1 *md_codegen_findmethod(u1 *ra)
91 /* get offset of first instruction (addi) */
93 mcode = *((u4 *) (ra + 1 * 4));
94 offset = (s2) (mcode & 0x0000ffff);
97 /* check for second instruction (addis) */
99 mcode = *((u4 *) (ra + 2 * 4));
101 if ((mcode >> 16) == 0x3dad) {
102 offset = (s2) (mcode << 16);
111 * These are local overrides for various environment variables in Emacs.
112 * Please do not remove this and leave it at the end of the file, where
113 * Emacs will automagically detect them.
114 * ---------------------------------------------------------------------
117 * indent-tabs-mode: t