1 /* src/vm/jit/i386/md.c - machine dependent i386 functions
3 Copyright (C) 1996-2005, 2006 R. Grafl, A. Krall, C. Kruegel,
4 C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
5 E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
6 J. Wenninger, 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., 51 Franklin Street, Fifth Floor, Boston, MA
25 Contact: cacao@cacaojvm.org
27 Authors: Christian Thalinger
29 Changes: Edwin Steiner
31 $Id: md.c 4612 2006-03-15 11:38:02Z edwin $
41 #include "vm/global.h"
42 #include "vm/jit/asmpart.h"
43 #include "vm/jit/codegen-common.h"
44 #include "vm/options.h" /* XXX debug */
45 #include "vm/jit/disass.h" /* XXX debug */
48 /* md_init *********************************************************************
50 Do some machine dependent initialization.
52 *******************************************************************************/
60 /* md_stacktrace_get_returnaddress *********************************************
62 Returns the return address of the current stackframe, specified by
63 the passed stack pointer and the stack frame size.
65 *******************************************************************************/
67 u1 *md_stacktrace_get_returnaddress(u1 *sp, u4 framesize)
71 /* on i386 the return address is above the current stack frame */
73 ra = *((u1 **) (sp + framesize));
79 /* md_codegen_findmethod *******************************************************
81 On this architecture just a wrapper function to codegen_findmethod.
83 *******************************************************************************/
85 u1 *md_codegen_findmethod(u1 *ra)
89 /* the the start address of the function which contains this
90 address from the method table */
92 pv = codegen_findmethod(ra);
97 /* md_patch_replacement_point **************************************************
99 Patch the given replacement point.
101 *******************************************************************************/
103 void md_patch_replacement_point(rplpoint *rp)
107 /* XXX this is probably unsafe! */
109 /* save the current machine code */
110 mcode = *(u8*)rp->pc;
112 /* write spinning instruction */
113 *(u2*)(rp->pc) = 0xebfe;
116 rp->pc[4] = (rp->mcode >> 32);
118 /* write first word */
119 *(u4*)(rp->pc) = (u4) rp->mcode;
121 /* store saved mcode */
130 /* XXX if required asm_cacheflush(rp->pc,4); */
134 * These are local overrides for various environment variables in Emacs.
135 * Please do not remove this and leave it at the end of the file, where
136 * Emacs will automagically detect them.
137 * ---------------------------------------------------------------------
140 * indent-tabs-mode: t
144 * vim:noexpandtab:sw=4:ts=4: