/* src/vm/jit/x86_64/md.h - machine dependent x86_64 functions
- Copyright (C) 1996-2005, 2006, 2007, 2008
+ Copyright (C) 1996-2005, 2006, 2007, 2008, 2009
CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
This file is part of CACAO.
/* inline functions ***********************************************************/
+/**
+ * Returns the size (in bytes) of the current stackframe, specified by
+ * the passed codeinfo structure.
+ */
+inline static int32_t md_stacktrace_get_framesize(codeinfo* code)
+{
+ // Check for the asm_vm_call_method special case.
+ if (code == NULL)
+ return 0;
+
+ // On x86_64 we use 8-byte stackslots.
+ return code->stackframesize * 8;
+}
+
+
/* md_stacktrace_get_returnaddress *********************************************
Returns the return address of the current stackframe, specified by
__asm__ __volatile__ ("" : : : "memory");
}
+
+/* md_get_cycle_count **********************************************************
+
+ Get the current time-stamp counter from the CPU.
+
+*******************************************************************************/
+
+inline static uint64_t md_get_cycle_count()
+{
+ uint64_t cycles;
+
+ // Get current cycles count from the CPU.
+ __asm__ __volatile__ ("rdtsc" : "=A" (cycles));
+
+ return cycles;
+}
+
#endif /* _VM_JIT_X86_64_MD_H */