[MC] Accept a numeric value as an ELF section header's type
GAS supports specification of section header's type using a numeric
value [1]. This patch brings the same functionality to LLVM. That allows
to setup some target-specific section types belong to the SHT_LOPROC -
SHT_HIPROC range. If we attempt to print unknown section type, MCSectionELF
class shows an error message. It's better than print sole '@' sign
without any section type name.
In case of MIPS, example of such section's type is SHT_MIPS_DWARF.
Without the patch we will have to implement some workarounds
in probably not-MIPS-specific part of code base to convert SHT_MIPS_DWARF
to the @progbits while printing assembly and to assign SHT_MIPS_DWARF for
@progbits sections named .debug_* if we encounter such section in
an input assembly.
[1] https://sourceware.org/binutils/docs/as/Section.html
Differential Revision: https://reviews.llvm.org/D29719
llvm-svn: 297446
diff --git a/llvm/lib/MC/MCSectionELF.cpp b/llvm/lib/MC/MCSectionELF.cpp
index fdd9239..c73fafe 100644
--- a/llvm/lib/MC/MCSectionELF.cpp
+++ b/llvm/lib/MC/MCSectionELF.cpp
@@ -12,6 +12,7 @@
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/Support/ELF.h"
+#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
@@ -140,6 +141,9 @@
OS << "progbits";
else if (Type == ELF::SHT_X86_64_UNWIND)
OS << "unwind";
+ else
+ report_fatal_error("unsupported type 0x" + Twine::utohexstr(Type) +
+ " for section " + getSectionName());
if (EntrySize) {
assert(Flags & ELF::SHF_MERGE);