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Added support for naked asm on OSX. (hopefully!)

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This commit is contained in:
Tomas Lindquist Olsen
2009-02-03 18:14:30 +01:00
parent aa2cd42536
commit e7125498e2
1 changed files with 43 additions and 17 deletions
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gen/naked.cpp
+43 -17
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@@ -104,34 +104,60 @@ void DtoDefineNakedFunction(FuncDeclaration* fd)
// build function header
// REALLY FIXME: this is most likely extremely platform dependent
// FIXME: could we perhaps use llvm asmwriter to give us these details ?
const char* mangle = fd->mangle();
const char* linkage = "globl";
std::string section = "text";
unsigned align = 16;
std::ostringstream tmpstr;
if (DtoIsTemplateInstance(fd))
// osx is different
// also mangling has an extra underscore prefixed
if (global.params.os == OSMacOSX)
{
linkage = "weak";
tmpstr << "section\t.gnu.linkonce.t." << mangle << ",\"ax\",@progbits";
section = tmpstr.str();
std::string section = "text";
bool weak = false;
if (DtoIsTemplateInstance(fd))
{
tmpstr << "section\t__TEXT,__textcoal_nt,coalesced,pure_instructions";
section = tmpstr.str();
weak = true;
}
asmstr << "\t." << section << std::endl;
asmstr << "\t.align\t4,0x90" << std::endl;
asmstr << "\t.globl\t_" << mangle << std::endl;
if (weak)
{
asmstr << "\t.weak_definition\t_" << mangle << std::endl;
}
asmstr << "_" << mangle << ":" << std::endl;
}
// this works on linux x86 32 and 64 bit
// assume it works everywhere else as well for now
else
{
const char* linkage = "globl";
std::string section = "text";
if (DtoIsTemplateInstance(fd))
{
linkage = "weak";
tmpstr << "section\t.gnu.linkonce.t." << mangle << ",\"ax\",@progbits";
section = tmpstr.str();
}
asmstr << "\t." << section << std::endl;
asmstr << "\t.align\t16" << std::endl;
asmstr << "\t." << linkage << "\t" << mangle << std::endl;
asmstr << "\t.type\t" << mangle << ",@function" << std::endl;
asmstr << mangle << ":" << std::endl;
}
asmstr << "\t." << section << std::endl;
asmstr << "\t.align\t" << align << std::endl;
asmstr << "\t." << linkage << "\t" << mangle << std::endl;
asmstr << "\t.type\t" << mangle << ",@function" << std::endl;
asmstr << mangle << ":" << std::endl;
// emit body
fd->fbody->toNakedIR(gIR);
// emit size after body
// why? dunno, llvm seems to do it by default ..
asmstr << "\t.size\t" << mangle << ", .-" << mangle << std::endl << std::endl;
// llvm does this on linux, but not on osx
if (global.params.os != OSMacOSX)
{
asmstr << "\t.size\t" << mangle << ", .-" << mangle << std::endl << std::endl;
}
gIR->module->appendModuleInlineAsm(asmstr.str());
asmstr.str("");