commit 64ad1cf24b2747093d06c8041d3f63ec80438dad
author Vladimir Stefanovic <vladimir.stefanovic@rt-rk.com> Wed Nov 21 16:38:34 2018 +0000
committer Vladimir Stefanovic <vladimir.stefanovic@rt-rk.com> Wed Nov 21 16:38:34 2018 +0000
tree c72959d7112b3536095e3ed93246e38f5c9902ec
parent 1d2714be13e05d0a134f5936345332ad504e7378

[mips][mc] Add basic support for R_MIPS_JALR/R_MICROMIPS_JALR

R_MIPS_JALR/R_MICROMIPS_JALR can now be parsed in .s files and emitted to .o.
They are still not generated with JALR.

Differential revision: https://reviews.llvm.org/D54721

llvm-svn: 347398

llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp

diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
index 63f9151..265d114 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
@@ -339,6 +339,8 @@
             (MCFixupKind)Mips::fixup_MICROMIPS_TLS_TPREL_HI16)
       .Case("R_MICROMIPS_TLS_TPREL_LO16",
             (MCFixupKind)Mips::fixup_MICROMIPS_TLS_TPREL_LO16)
+      .Case("R_MIPS_JALR", (MCFixupKind)Mips::fixup_Mips_JALR)
+      .Case("R_MICROMIPS_JALR", (MCFixupKind)Mips::fixup_MICROMIPS_JALR)
       .Default(MCAsmBackend::getFixupKind(Name));
 }
 
@@ -417,7 +419,9 @@
     { "fixup_MICROMIPS_TLS_TPREL_HI16",  0,     16,   0 },
     { "fixup_MICROMIPS_TLS_TPREL_LO16",  0,     16,   0 },
     { "fixup_Mips_SUB",                  0,     64,   0 },
-    { "fixup_MICROMIPS_SUB",             0,     64,   0 }
+    { "fixup_MICROMIPS_SUB",             0,     64,   0 },
+    { "fixup_Mips_JALR",                 0,     32,   0 },
+    { "fixup_MICROMIPS_JALR",            0,     32,   0 }
   };
   static_assert(array_lengthof(LittleEndianInfos) == Mips::NumTargetFixupKinds,
                 "Not all MIPS little endian fixup kinds added!");
@@ -495,7 +499,9 @@
     { "fixup_MICROMIPS_TLS_TPREL_HI16",  16,     16,   0 },
     { "fixup_MICROMIPS_TLS_TPREL_LO16",  16,     16,   0 },
     { "fixup_Mips_SUB",                   0,     64,   0 },
-    { "fixup_MICROMIPS_SUB",              0,     64,   0 }
+    { "fixup_MICROMIPS_SUB",              0,     64,   0 },
+    { "fixup_Mips_JALR",                  0,     32,   0 },
+    { "fixup_MICROMIPS_JALR",             0,     32,   0 }
   };
   static_assert(array_lengthof(BigEndianInfos) == Mips::NumTargetFixupKinds,
                 "Not all MIPS big endian fixup kinds added!");
@@ -553,6 +559,7 @@
   case Mips::fixup_Mips_TLSLDM:
   case Mips::fixup_Mips_TPREL_HI:
   case Mips::fixup_Mips_TPREL_LO:
+  case Mips::fixup_Mips_JALR:
   case Mips::fixup_MICROMIPS_CALL16:
   case Mips::fixup_MICROMIPS_GOT_DISP:
   case Mips::fixup_MICROMIPS_GOT_PAGE:
@@ -565,6 +572,7 @@
   case Mips::fixup_MICROMIPS_TLS_LDM:
   case Mips::fixup_MICROMIPS_TLS_TPREL_HI16:
   case Mips::fixup_MICROMIPS_TLS_TPREL_LO16:
+  case Mips::fixup_MICROMIPS_JALR:
     return true;
   }
 }

llvm/lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp

diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp
index c600382..0e8de05 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp
@@ -401,6 +401,10 @@
     return ELF::R_MICROMIPS_HIGHER;
   case Mips::fixup_MICROMIPS_HIGHEST:
     return ELF::R_MICROMIPS_HIGHEST;
+  case Mips::fixup_Mips_JALR:
+    return ELF::R_MIPS_JALR;
+  case Mips::fixup_MICROMIPS_JALR:
+    return ELF::R_MICROMIPS_JALR;
   }
 
   llvm_unreachable("invalid fixup kind!");

llvm/lib/Target/Mips/MCTargetDesc/MipsFixupKinds.h

diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsFixupKinds.h b/llvm/lib/Target/Mips/MCTargetDesc/MipsFixupKinds.h
index d7f6cf9..eedad16 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsFixupKinds.h
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsFixupKinds.h
@@ -222,6 +222,10 @@
     fixup_Mips_SUB,
     fixup_MICROMIPS_SUB,
 
+    // resulting in - R_MIPS_JALR/R_MICROMIPS_JALR
+    fixup_Mips_JALR,
+    fixup_MICROMIPS_JALR,
+
     // Marker
     LastTargetFixupKind,
     NumTargetFixupKinds = LastTargetFixupKind - FirstTargetFixupKind