Initial TOC support for PowerPC64 object creation
This patch adds initial PPC64 TOC MC object creation using the small mcmodel
(a single 64K TOC) adding the some TOC relocations (R_PPC64_TOC,
R_PPC64_TOC16, and R_PPC64_TOC16DS).
The addition of 'undefinedExplicitRelSym' hook on 'MCELFObjectTargetWriter'
is meant to avoid the creation of an unreferenced ".TOC." symbol (used in
the .odp creation) as well to set the R_PPC64_TOC relocation target as the
temporary ".TOC." symbol. On PPC64 ABI, the R_PPC64_TOC relocation should
not point to any symbol.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166677 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/MCTargetDesc/PPCAsmBackend.cpp b/lib/Target/PowerPC/MCTargetDesc/PPCAsmBackend.cpp
index 1744738..87ecb13 100644
--- a/lib/Target/PowerPC/MCTargetDesc/PPCAsmBackend.cpp
+++ b/lib/Target/PowerPC/MCTargetDesc/PPCAsmBackend.cpp
@@ -29,9 +29,14 @@
case FK_Data_1:
case FK_Data_2:
case FK_Data_4:
+ case FK_Data_8:
+ case PPC::fixup_ppc_toc:
return Value;
+ case PPC::fixup_ppc_lo14:
+ case PPC::fixup_ppc_toc16_ds:
+ return (Value & 0xffff) << 2;
case PPC::fixup_ppc_brcond14:
- return Value & 0x3ffc;
+ return Value & 0xfffc;
case PPC::fixup_ppc_br24:
return Value & 0x3fffffc;
#if 0
@@ -41,6 +46,7 @@
case PPC::fixup_ppc_ha16:
return ((Value >> 16) + ((Value & 0x8000) ? 1 : 0)) & 0xffff;
case PPC::fixup_ppc_lo16:
+ case PPC::fixup_ppc_toc16:
return Value & 0xffff;
}
}
@@ -72,7 +78,10 @@
{ "fixup_ppc_brcond14", 16, 14, MCFixupKindInfo::FKF_IsPCRel },
{ "fixup_ppc_lo16", 16, 16, 0 },
{ "fixup_ppc_ha16", 16, 16, 0 },
- { "fixup_ppc_lo14", 16, 14, 0 }
+ { "fixup_ppc_lo14", 16, 14, 0 },
+ { "fixup_ppc_toc", 0, 64, 0 },
+ { "fixup_ppc_toc16", 16, 16, 0 },
+ { "fixup_ppc_toc16_ds", 16, 14, 0 }
};
if (Kind < FirstTargetFixupKind)