1 /* src/vm/jit/mips/md.c - machine dependent MIPS 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 3116 2005-07-27 12:14:03Z twisti $
42 #include "vm/jit/mips/types.h"
44 #include "vm/global.h"
47 void docacheflush(u1 *p, long bytelen)
50 long psize = sysconf(_SC_PAGESIZE);
51 p -= (long) p & (psize - 1);
52 e += psize - ((((long) e - 1) & (psize - 1)) + 1);
54 mprotect(p, bytelen, PROT_READ | PROT_WRITE | PROT_EXEC);
58 /* md_stacktrace_get_returnaddress *********************************************
60 Returns the return address of the current stackframe, specified by
61 the passed stack pointer and the stack frame size.
63 *******************************************************************************/
65 functionptr md_stacktrace_get_returnaddress(u1 *sp, u4 framesize)
69 /* on MIPS the return address is located on the top of the stackframe */
71 ra = (functionptr) *((u1 **) (sp + framesize - SIZEOF_VOID_P));
77 /* codegen_findmethod **********************************************************
82 237affe8 lda pv,-24(ra)
84 *******************************************************************************/
86 functionptr codegen_findmethod(functionptr pc)
96 /* get first instruction word after jump */
100 /* check if we have 2 instructions (ldah, lda) */
102 if ((mcode >> 16) == 0x3c19) {
103 /* get displacement of first instruction (lui) */
105 offset = (s4) (mcode << 16);
108 /* get displacement of second instruction (daddiu) */
110 mcode = *((u4 *) (ra + 1 * 4));
112 if ((mcode >> 16) != 0x6739) {
113 log_text("No `daddiu' instruction found on return address!");
117 offset = (s2) (mcode & 0x0000ffff);
121 /* get offset of first instruction (daddiu) */
123 mcode = *((u4 *) ra);
125 if ((mcode >> 16) != 0x67fe) {
126 log_text("No `daddiu s8,ra,x' instruction found on return address!");
130 offset = (s2) (mcode & 0x0000ffff);
134 return (functionptr) pv;
139 * These are local overrides for various environment variables in Emacs.
140 * Please do not remove this and leave it at the end of the file, where
141 * Emacs will automagically detect them.
142 * ---------------------------------------------------------------------
145 * indent-tabs-mode: t