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[SystemZ] Support all TLS access models - MC part

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The current SystemZ back-end only supports the local-exec TLS access model.
This patch adds all required MC support for the other TLS models, which
means in particular:

- Support additional relocation types for
  Initial-exec model: R_390_TLS_IEENT
  Local-dynamic-model: R_390_TLS_LDO32, R_390_TLS_LDO64,
                       R_390_TLS_LDM32, R_390_TLS_LDM64, R_390_TLS_LDCALL
  General-dynamic model: R_390_TLS_GD32, R_390_TLS_GD64, R_390_TLS_GDCALL

- Support assembler syntax to generate additional relocations
  for use with __tls_get_offset calls:
    :tls_gdcall:
    :tls_ldcall:

The patch also adds a new test to verify fixups and relocations,
and removes the (already unused) FK_390_PLT16DBL/FK_390_PLT32DBL
fixup kinds.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229652 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ulrich Weigand
2015-02-18 09:11:36 +00:00
parent 582e77af02
commit ca1a3cf45b
10 changed files with 344 additions and 21 deletions
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8
lib/Target/SystemZ/MCTargetDesc/SystemZMCAsmBackend.cpp
View File

@@ -27,9 +27,10 @@ static uint64_t extractBitsForFixup(MCFixupKind Kind, uint64_t Value) {
switch (unsigned(Kind)) {
case SystemZ::FK_390_PC16DBL:
case SystemZ::FK_390_PC32DBL:
case SystemZ::FK_390_PLT16DBL:
case SystemZ::FK_390_PLT32DBL:
return (int64_t)Value / 2;
case SystemZ::FK_390_TLS_CALL:
return 0;
}
llvm_unreachable("Unknown fixup kind!");
@@ -72,8 +73,7 @@ SystemZMCAsmBackend::getFixupKindInfo(MCFixupKind Kind) const {
const static MCFixupKindInfo Infos[SystemZ::NumTargetFixupKinds] = {
{ "FK_390_PC16DBL", 0, 16, MCFixupKindInfo::FKF_IsPCRel },
{ "FK_390_PC32DBL", 0, 32, MCFixupKindInfo::FKF_IsPCRel },
{ "FK_390_PLT16DBL", 0, 16, MCFixupKindInfo::FKF_IsPCRel },
{ "FK_390_PLT32DBL", 0, 32, MCFixupKindInfo::FKF_IsPCRel }
{ "FK_390_TLS_CALL", 0, 0, 0 }
};
if (Kind < FirstTargetFixupKind)