1 /* src/vm/jit/m68k/md.h
3 Copyright (C) 1996-2005, 2006, 2007 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
28 #ifndef _VM_JIT_M68K_MD_H
29 #define _VM_JIT_M68K_MD_H
36 #include "vm/jit/codegen-common.h"
39 /* md_stacktrace_get_returnaddress *********************************************
41 Returns the return address of the current stackframe, specified by
42 the passed stack pointer and the stack frame size.
44 *******************************************************************************/
46 inline static void *md_stacktrace_get_returnaddress(void *sp, int32_t stackframesize)
50 /* return address is above stackpointer */
52 ra = *((void **) (((uintptr_t) sp) + stackframesize));
54 /* XXX: This helps for now, but it's a ugly hack
55 * the problem _may_ be: the link instruction is used
56 * by some gcc generated code, and we get an additional word
57 * on the stack, the old framepointer. Its address is somewhere
58 * near sp, but that all depends the code generated by the compiler.
59 * I'm unsure about a clean solution.
62 if (!(ra > 0x40000000 && ra < 0x80000000)) {
63 ra = *((u1**)(sp + framesize + 4));
67 /* assert(ra > 0x40000000 && ra < 0x80000000);
68 printf("XXXXXX=%x\n", ra);
75 /* md_codegen_get_pv_from_pc ***************************************************
77 On this architecture just a wrapper function to
78 codegen_get_pv_from_pc.
80 *******************************************************************************/
82 inline static void *md_codegen_get_pv_from_pc(void *ra)
86 pv = codegen_get_pv_from_pc(ra);
92 /* XXX i can't find a definition of cacheflush in any installed header files but i can find the symbol in libc */
93 /* lets extract the signature from the assembler code*/
95 000e7158 <cacheflush>:
96 e7158: 707b moveq #123,%d0
97 e715a: 2f04 movel %d4,%sp@-
98 e715c: 282f 0014 movel %sp@(20),%d4 arg
99 e7160: 2243 moveal %d3,%a1
100 e7162: 262f 0010 movel %sp@(16),%d3 arg
101 e7166: 2042 moveal %d2,%a0
102 e7168: 242f 000c movel %sp@(12),%d2 arg
103 e716c: 222f 0008 movel %sp@(8),%d1 arg
104 e7170: 4e40 trap #0 traps into system i guess
105 e7172: 2408 movel %a0,%d2
106 e7174: 2609 movel %a1,%d3
107 e7176: 281f movel %sp@+,%d4
108 e7178: 223c ffff f001 movel #-4095,%d1
109 e717e: b081 cmpl %d1,%d0
110 e7180: 6402 bccs e7184 <cacheflush+0x2c>
113 e7186: 2f00 movel %d0,%sp@-
114 e7188: 61ff fff3 82e2 bsrl 1f46c <D_MAX_EXP+0x1ec6d>
115 e718e: 209f movel %sp@+,%a0@
116 e7190: 70ff moveq #-1,%d0
117 e7192: 2040 moveal %d0,%a0
122 /* seems to have 4 arguments */
123 /* best guess: it is this syscall */
124 /* asmlinkage int sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len) */
125 /* kernel 2.6.10 with freescale patches (the one I develop against) needs a patch of */
126 /* arch/m68k/kernel/sys_m68k.c(sys_cacheflush) */
129 void DcacheFlushInvalidateCacheBlock(void *start, unsigned long size);
130 void IcacheInvalidateCacheBlock(void *start, unsigned long size);
133 sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
136 DcacheFlushInvalidateCacheBlock(addr, len);
137 IcacheInvalidateCacheBlock(addr, len);
143 extern int cacheflush(unsigned long addr, int scope, int cache, unsigned long len);
145 #include "asm/cachectl.h" /* found more traces of the cacheflush function */
149 /* md_cacheflush ***************************************************************
151 Calls the system's function to flush the instruction and data
154 *******************************************************************************/
156 inline static void md_cacheflush(void *addr, int nbytes)
158 cacheflush((unsigned long)addr, FLUSH_SCOPE_PAGE, FLUSH_CACHE_BOTH, nbytes);
162 /* md_icacheflush **************************************************************
164 Calls the system's function to flush the instruction cache.
166 *******************************************************************************/
168 inline static void md_icacheflush(void *addr, int nbytes)
170 cacheflush((unsigned long)addr, FLUSH_SCOPE_LINE, FLUSH_CACHE_INSN, nbytes);
174 /* md_dcacheflush **************************************************************
176 Calls the system's function to flush the data cache.
178 *******************************************************************************/
180 inline static void md_dcacheflush(void *addr, int nbytes)
182 cacheflush((unsigned long)addr, FLUSH_SCOPE_PAGE, FLUSH_CACHE_DATA, nbytes);
185 #endif /* _VM_JIT_M68K_MD_H */
189 * These are local overrides for various environment variables in Emacs.
190 * Please do not remove this and leave it at the end of the file, where
191 * Emacs will automagically detect them.
192 * ---------------------------------------------------------------------
195 * indent-tabs-mode: t
199 * vim:noexpandtab:sw=4:ts=4: