1 /* src/vm/jit/i386/md.h - machine dependent i386 functions
3 Copyright (C) 1996-2005, 2006, 2007, 2008, 2009
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
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26 #ifndef _VM_JIT_I386_MD_H
27 #define _VM_JIT_I386_MD_H
34 #include "vm/jit/codegen-common.hpp"
35 #include "vm/jit/methodtree.h"
38 /* inline functions ***********************************************************/
41 * Returns the size (in bytes) of the current stackframe, specified by
42 * the passed codeinfo structure.
44 inline static int32_t md_stacktrace_get_framesize(codeinfo* code)
46 int32_t stackframesize;
48 // Check for the asm_vm_call_method special case.
52 // On i386 we use 8-byte stackslots.
53 stackframesize = code->stackframesize * 8;
55 // If there is a stackframe present, we need to take the alignment
56 // compensation for the stored return address into account.
57 if (stackframesize != 0)
60 return stackframesize;
64 /* md_stacktrace_get_returnaddress *********************************************
66 Returns the return address of the current stackframe, specified by
67 the passed stack pointer and the stack frame size.
69 *******************************************************************************/
71 inline static void *md_stacktrace_get_returnaddress(void *sp, int32_t stackframesize)
75 /* On i386 the return address is above the current stack frame. */
77 ra = *((void **) (((uintptr_t) sp) + stackframesize));
83 /* md_codegen_get_pv_from_pc ***************************************************
85 On this architecture just a wrapper function to
88 *******************************************************************************/
90 inline static void *md_codegen_get_pv_from_pc(void *ra)
94 /* Get the start address of the function which contains this
95 address from the method table. */
97 pv = methodtree_find(ra);
103 /* md_cacheflush ***************************************************************
105 Calls the system's function to flush the instruction and data
108 *******************************************************************************/
110 inline static void md_cacheflush(void *addr, int nbytes)
112 // Compiler optimization barrier (see PR97).
113 __asm__ __volatile__ ("" : : : "memory");
117 /* md_icacheflush **************************************************************
119 Calls the system's function to flush the instruction cache.
121 *******************************************************************************/
123 inline static void md_icacheflush(void *addr, int nbytes)
125 // Compiler optimization barrier (see PR97).
126 __asm__ __volatile__ ("" : : : "memory");
130 /* md_dcacheflush **************************************************************
132 Calls the system's function to flush the data cache.
134 *******************************************************************************/
136 inline static void md_dcacheflush(void *addr, int nbytes)
138 // Compiler optimization barrier (see PR97).
139 __asm__ __volatile__ ("" : : : "memory");
143 /* md_get_cycle_count **********************************************************
145 Get the current time-stamp counter from the CPU.
147 *******************************************************************************/
149 inline static uint64_t md_get_cycle_count()
153 // Get current cycles count from the CPU.
154 __asm__ __volatile__ ("rdtsc" : "=A" (cycles));
159 #endif /* _VM_JIT_I386_MD_H */
163 * These are local overrides for various environment variables in Emacs.
164 * Please do not remove this and leave it at the end of the file, where
165 * Emacs will automagically detect them.
166 * ---------------------------------------------------------------------
169 * indent-tabs-mode: t
173 * vim:noexpandtab:sw=4:ts=4: