void MachOLinkingContext::configure(HeaderFileType type, Arch arch, OS os,
uint32_t minOSVersion) {
_outputMachOType = type;
_arch = arch;
_os = os;
_osMinVersion = minOSVersion;
switch (_outputMachOType) {
case llvm::MachO::MH_EXECUTE:
// If targeting newer OS, use _main
if (minOS("10.8", "6.0")) {
_entrySymbolName = "_main";
} else {
// If targeting older OS, use start (in crt1.o)
_entrySymbolName = "start";
}
// __PAGEZERO defaults to 4GB on 64-bit (except for PP64 which lld does not
// support) and 4KB on 32-bit.
if (is64Bit(_arch)) {
_pageZeroSize = 0x100000000;
} else {
_pageZeroSize = 0x1000;
}
// Make PIE by default when targetting newer OSs.
switch (os) {
case OS::macOSX:
if (minOSVersion >= 0x000A0700) // MacOSX 10.7
_pie = true;
break;
case OS::iOS:
if (minOSVersion >= 0x00040300) // iOS 4.3
_pie = true;
break;
case OS::iOS_simulator:
_pie = true;
break;
case OS::unknown:
break;
}
break;
case llvm::MachO::MH_DYLIB:
_globalsAreDeadStripRoots = true;
break;
case llvm::MachO::MH_BUNDLE:
break;
case llvm::MachO::MH_OBJECT:
_printRemainingUndefines = false;
_allowRemainingUndefines = true;
default:
break;
}
// Set default segment page sizes based on arch.
if (arch == arch_arm64)
_pageSize = 4*4096;
}
bool MachOLinkingContext::addUnixThreadLoadCommand() const {
switch (_outputMachOType) {
case MH_EXECUTE:
if (_outputMachOTypeStatic)
return true;
else
return !minOS("10.8", "6.0");
break;
case MH_DYLINKER:
case MH_PRELOAD:
return true;
default:
return false;
}
}
/*!
SLButton::buildAABB builds and returns the axis-aligned bounding box.
*/
SLAABBox& SLButton::updateAABBRec()
{
// build AABB of subMenus
SLNode::updateAABBRec();
// calculate min & max in object space
SLVec3f minOS((SLfloat)_minX, (SLfloat)_minY, -0.01f);
SLVec3f maxOS((SLfloat)(_minX+_btnW), (SLfloat)(_minY+_btnH), 0.01f);
// enlarge aabb for avoiding rounding errors
minOS -= FLT_EPSILON;
maxOS += FLT_EPSILON;
// apply world matrix: this overwrites the AABB of the group
_aabb.fromOStoWS(minOS, maxOS, updateAndGetWM());
return _aabb;
}
bool MachOLinkingContext::addEntryPointLoadCommand() const {
if ((_outputMachOType == MH_EXECUTE) && !_outputMachOTypeStatic) {
return minOS("10.8", "6.0");
}
return false;
}
