void
BinOutput::OutputSection(Section& sect, const IntNum& origin)
{
BytecodeOutput* outputter;
if (sect.isBSS())
{
outputter = &m_no_output;
}
else
{
IntNum file_start = sect.getLMA();
file_start -= origin;
if (file_start.getSign() < 0)
{
Diag(SourceLocation(), diag::err_section_before_origin)
<< sect.getName();
return;
}
if (!file_start.isOkSize(sizeof(unsigned long)*8, 0, 0))
{
Diag(SourceLocation(), diag::err_start_too_large)
<< sect.getName();
return;
}
m_fd_os.seek(file_start.getUInt());
if (m_os.has_error())
{
Diag(SourceLocation(), diag::err_file_output_seek);
return;
}
outputter = this;
}
for (Section::bc_iterator i=sect.bytecodes_begin(),
end=sect.bytecodes_end(); i != end; ++i)
{
i->Output(*outputter);
}
}
void
BinObject::DirSection(DirectiveInfo& info, Diagnostic& diags)
{
assert(info.isObject(m_object));
NameValues& nvs = info.getNameValues();
SourceLocation source = info.getSource();
NameValue& sectname_nv = nvs.front();
if (!sectname_nv.isString())
{
diags.Report(sectname_nv.getValueRange().getBegin(),
diag::err_value_string_or_id);
return;
}
llvm::StringRef sectname = sectname_nv.getString();
Section* sect = m_object.FindSection(sectname);
bool first = true;
if (sect)
first = sect->isDefault();
else
sect = AppendSection(sectname, source, diags);
m_object.setCurSection(sect);
sect->setDefault(false);
// No name/values, so nothing more to do
if (nvs.size() <= 1)
return;
// Ignore flags if we've seen this section before
if (!first)
{
diags.Report(info.getSource(), diag::warn_section_redef_flags);
return;
}
// Parse section flags
bool has_follows = false, has_vfollows = false;
bool has_start = false, has_vstart = false;
std::auto_ptr<Expr> start(0);
std::auto_ptr<Expr> vstart(0);
BinSection* bsd = sect->getAssocData<BinSection>();
assert(bsd);
unsigned long bss = sect->isBSS();
unsigned long code = sect->isCode();
DirHelpers helpers;
helpers.Add("follows", true,
TR1::bind(&DirString, _1, _2, &bsd->follows, &has_follows));
helpers.Add("vfollows", true,
TR1::bind(&DirString, _1, _2, &bsd->vfollows, &has_vfollows));
helpers.Add("start", true,
TR1::bind(&DirExpr, _1, _2, &m_object, &start, &has_start));
helpers.Add("vstart", true,
TR1::bind(&DirExpr, _1, _2, &m_object, &vstart, &has_vstart));
helpers.Add("align", true,
TR1::bind(&DirIntNumPower2, _1, _2, &m_object, &bsd->align,
&bsd->has_align));
helpers.Add("valign", true,
TR1::bind(&DirIntNumPower2, _1, _2, &m_object, &bsd->valign,
&bsd->has_valign));
helpers.Add("nobits", false, TR1::bind(&DirSetFlag, _1, _2, &bss, 1));
helpers.Add("progbits", false, TR1::bind(&DirClearFlag, _1, _2, &bss, 1));
helpers.Add("code", false, TR1::bind(&DirSetFlag, _1, _2, &code, 1));
helpers.Add("data", false, TR1::bind(&DirClearFlag, _1, _2, &code, 1));
helpers.Add("execute", false, TR1::bind(&DirSetFlag, _1, _2, &code, 1));
helpers.Add("noexecute", false, TR1::bind(&DirClearFlag, _1, _2, &code, 1));
helpers(++nvs.begin(), nvs.end(), info.getSource(), diags,
DirNameValueWarn);
if (start.get() != 0)
{
bsd->start.reset(start.release());
bsd->start_source = source;
}
if (vstart.get() != 0)
{
bsd->vstart.reset(vstart.release());
bsd->vstart_source = source;
}
if (bsd->start.get() != 0 && !bsd->follows.empty())
{
diags.Report(info.getSource(), diags.getCustomDiagID(Diagnostic::Error,
"cannot combine '%0' and '%1' section attributes"))
<< "START" << "FOLLOWS";
}
if (bsd->vstart.get() != 0 && !bsd->vfollows.empty())
{
diags.Report(info.getSource(), diags.getCustomDiagID(Diagnostic::Error,
"cannot combine '%0' and '%1' section attributes"))
<< "VSTART" << "VFOLLOWS";
}
sect->setBSS(bss);
sect->setCode(code);
}
void
XdfObject::DirSection(DirectiveInfo& info, Diagnostic& diags)
{
assert(info.isObject(m_object));
NameValues& nvs = info.getNameValues();
NameValue& sectname_nv = nvs.front();
if (!sectname_nv.isString())
{
diags.Report(sectname_nv.getValueRange().getBegin(),
diag::err_value_string_or_id);
return;
}
llvm::StringRef sectname = sectname_nv.getString();
Section* sect = m_object.FindSection(sectname);
bool first = true;
if (sect)
first = sect->isDefault();
else
sect = AppendSection(sectname, info.getSource(), diags);
XdfSection* xsect = sect->getAssocData<XdfSection>();
assert(xsect != 0);
m_object.setCurSection(sect);
sect->setDefault(false);
if (xsect->bits != 0)
m_object.getArch()->setVar("mode_bits", xsect->bits); // reapply
// No name/values, so nothing more to do
if (nvs.size() <= 1)
return;
// Ignore flags if we've seen this section before
if (!first)
{
diags.Report(info.getSource(), diag::warn_section_redef_flags);
return;
}
// Parse section flags
IntNum align;
bool has_align = false;
unsigned long bss = sect->isBSS();
unsigned long code = sect->isCode();
IntNum vma = sect->getVMA();
IntNum lma = sect->getLMA();
unsigned long flat = xsect->flat;
DirHelpers helpers;
helpers.Add("use16", false,
TR1::bind(&DirResetFlag, _1, _2, &xsect->bits, 16));
helpers.Add("use32", false,
TR1::bind(&DirResetFlag, _1, _2, &xsect->bits, 32));
helpers.Add("use64", false,
TR1::bind(&DirResetFlag, _1, _2, &xsect->bits, 64));
helpers.Add("bss", false, TR1::bind(&DirSetFlag, _1, _2, &bss, 1));
helpers.Add("nobss", false, TR1::bind(&DirClearFlag, _1, _2, &bss, 1));
helpers.Add("code", false, TR1::bind(&DirSetFlag, _1, _2, &code, 1));
helpers.Add("data", false, TR1::bind(&DirClearFlag, _1, _2, &code, 1));
helpers.Add("flat", false, TR1::bind(&DirSetFlag, _1, _2, &flat, 1));
helpers.Add("noflat", false, TR1::bind(&DirClearFlag, _1, _2, &flat, 1));
helpers.Add("absolute", true,
TR1::bind(&DirIntNum, _1, _2, &m_object, &lma,
&xsect->has_addr));
helpers.Add("virtual", true,
TR1::bind(&DirIntNum, _1, _2, &m_object, &vma,
&xsect->has_vaddr));
helpers.Add("align", true,
TR1::bind(&DirIntNumPower2, _1, _2, &m_object, &align,
&has_align));
helpers(++nvs.begin(), nvs.end(), info.getSource(), diags,
DirNameValueWarn);
if (has_align)
{
unsigned long aligni = align.getUInt();
// Check to see if alignment is supported size
// FIXME: Use actual value source location
if (aligni > 4096)
{
diags.Report(info.getSource(),
diags.getCustomDiagID(Diagnostic::Error,
"XDF does not support alignments > 4096"));
}
sect->setAlign(aligni);
}
sect->setBSS(bss);
sect->setCode(code);
sect->setVMA(vma);
sect->setLMA(lma);
xsect->flat = flat;
if (xsect->bits != 0)
m_object.getArch()->setVar("mode_bits", xsect->bits);
}
void
XdfOutput::OutputSection(Section& sect)
{
BytecodeOutput* outputter = this;
XdfSection* xsect = sect.getAssocData<XdfSection>();
assert(xsect != NULL);
uint64_t pos;
if (sect.isBSS())
{
// Don't output BSS sections.
outputter = &m_no_output;
pos = 0; // position = 0 because it's not in the file
}
else
{
pos = m_os.tell();
if (m_os.has_error())
{
Diag(SourceLocation(), diag::err_file_output_position);
return;
}
}
// Output bytecodes
xsect->size = 0;
for (Section::bc_iterator i=sect.bytecodes_begin(),
end=sect.bytecodes_end(); i != end; ++i)
{
if (i->Output(*outputter))
xsect->size += i->getTotalLen();
}
// Sanity check final section size
assert(xsect->size == sect.bytecodes_back().getNextOffset());
// Empty? Go on to next section
if (xsect->size == 0)
return;
sect.setFilePos(static_cast<unsigned long>(pos));
// No relocations to output? Go on to next section
if (sect.getRelocs().size() == 0)
return;
pos = m_os.tell();
if (m_os.has_error())
{
Diag(SourceLocation(), diag::err_file_output_position);
return;
}
xsect->relptr = static_cast<unsigned long>(pos);
for (Section::const_reloc_iterator i=sect.relocs_begin(),
end=sect.relocs_end(); i != end; ++i)
{
const XdfReloc& reloc = static_cast<const XdfReloc&>(*i);
Bytes& scratch = getScratch();
reloc.Write(scratch);
assert(scratch.size() == RELOC_SIZE);
m_os << scratch;
}
}
