Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

120 lines (98 sloc) 2.776 kb
/* Copyright (c) 2008-2009, Avian Contributors
Permission to use, copy, modify, and/or distribute this software
for any purpose with or without fee is hereby granted, provided
that the above copyright notice and this permission notice appear
in all copies.
There is NO WARRANTY for this software. See license.txt for
details. */
#ifndef ARM_H
#define ARM_H
#include "types.h"
#include "common.h"
#define IP_REGISTER(context) (context->uc_mcontext.gregs[15])
#define STACK_REGISTER(context) (context->uc_mcontext.gregs[13])
#define THREAD_REGISTER(context) (context->uc_mcontext.gregs[12])
extern "C" uint64_t
vmNativeCall(void* function, unsigned stackTotal, void* memoryTable,
unsigned memoryCount, void* gprTable);
namespace vm {
inline void
trap()
{
asm("nop");
}
inline void
memoryBarrier()
{
asm("nop");
}
inline void
storeStoreMemoryBarrier()
{
memoryBarrier();
}
inline void
storeLoadMemoryBarrier()
{
memoryBarrier();
}
inline void
loadMemoryBarrier()
{
memoryBarrier();
}
inline void
syncInstructionCache(const void* start UNUSED, unsigned size UNUSED)
{
asm("nop");
}
inline uint64_t
dynamicCall(void* function, uintptr_t* arguments, uint8_t* argumentTypes,
unsigned argumentCount, unsigned argumentsSize,
unsigned returnType UNUSED)
{
const unsigned GprCount = 4;
uintptr_t gprTable[GprCount];
unsigned gprIndex = 0;
uintptr_t stack[argumentsSize / BytesPerWord];
unsigned stackIndex = 0;
unsigned ai = 0;
for (unsigned ati = 0; ati < argumentCount; ++ ati) {
switch (argumentTypes[ati]) {
case DOUBLE_TYPE:
case INT64_TYPE: {
if (gprIndex + (8 / BytesPerWord) <= GprCount) {
memcpy(gprTable + gprIndex, arguments + ai, 8);
gprIndex += 8 / BytesPerWord;
} else if (gprIndex == GprCount-1) { // split between last GPR and stack
memcpy(gprTable + gprIndex, arguments + ai, 4);
++gprIndex;
memcpy(stack + stackIndex, arguments + ai + 4, 4);
++stackIndex;
} else {
memcpy(stack + stackIndex, arguments + ai, 8);
stackIndex += 8 / BytesPerWord;
}
ai += 8 / BytesPerWord;
} break;
default: {
if (gprIndex < GprCount) {
gprTable[gprIndex++] = arguments[ai];
} else {
stack[stackIndex++] = arguments[ai];
}
++ ai;
} break;
}
}
if (gprIndex < GprCount) { // pad since assembly loads all GPRs
memset(gprTable + gprIndex, 0, (GprCount-gprIndex)*4);
gprIndex = GprCount;
}
unsigned stackSize = stackIndex*BytesPerWord + ((stackIndex & 1) << 2);
return vmNativeCall
(function, stackSize, stack, stackIndex * BytesPerWord,
(gprIndex ? gprTable : 0));
}
} // namespace vm
#endif // ARM_H
Jump to Line
Something went wrong with that request. Please try again.