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Make alignment of a stack required by a function call proper.

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This commit is contained in:
kobalicek
2015-12-15 17:06:27 +01:00
parent bda7673558
commit e726dd3872
2 changed files with 9 additions and 2 deletions
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2
src/asmjit/base/runtime.cpp
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@@ -53,7 +53,7 @@ uint32_t HostRuntime::getStackAlignment() {
// not sure about all other UNIX operating systems, because 16-byte alignment
// is addition to an older specification.
#if (ASMJIT_ARCH_X64) || \
(ASMJIT_ARCH_X86 && (ASMJIT_OS_LINUX || ASMJIT_OS_BSD || ASMJIT_OS_MAC))
(ASMJIT_ARCH_X86 && (ASMJIT_OS_LINUX || ASMJIT_OS_BSD || ASMJIT_OS_MAC || ASMJIT_OS_ANDROID))
alignment = 16;
#endif

9
src/asmjit/x86/x86compilercontext.cpp
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@@ -4856,6 +4856,7 @@ static Error X86Context_initFunc(X86Context* self, X86FuncNode* func) {
// Adjust stack pointer if function is caller.
if (func->isCaller()) {
func->addFuncFlags(kFuncFlagIsStackAdjusted);
func->_callStackSize = Utils::alignTo<uint32_t>(func->getCallStackSize(), func->getRequiredStackAlignment());
}
// Adjust stack pointer if manual stack alignment is needed.
@@ -4962,13 +4963,19 @@ static Error X86Context_initFunc(X86Context* self, X86FuncNode* func) {
// Count push/pop sequence.
v += func->getPushPopStackSize();
// Count save/restore sequence for XMM registers (should be already aligned).
v += func->getMoveStackSize();
// Maximum memory required to call all functions within this function.
v += func->getCallStackSize();
// Calculate the final offset to keep stack alignment.
func->_alignStackSize = Utils::alignDiff<uint32_t>(v, func->getRequiredStackAlignment());
}
// Memory stack size.
func->_memStackSize = self->_memAllTotal;
func->_alignedMemStackSize = Utils::alignTo<uint32_t>(func->_memStackSize, func->_requiredStackAlignment);
func->_alignedMemStackSize = Utils::alignTo<uint32_t>(func->_memStackSize, func->getRequiredStackAlignment());
if (func->isNaked()) {
self->_argBaseReg = kX86RegIndexSp;