[lld] r275236 - Add -m elf32_x86_64.

[Rui Ueyama via llvm-commits]

Author: ruiu
Date: Tue Jul 12 18:28:33 2016
New Revision: 275236

URL: http://llvm.org/viewvc/llvm-project?rev=275236&view=rev
Log:
Add -m elf32_x86_64.

Patch by H.J. Lu.

This patch adds -m elf32_x86_64 to lld. But it doesn't generate working
x32 binaries.

Differential Revision: http://reviews.llvm.org/D22268

Added:
    lld/trunk/test/ELF/x86-64-rela.s
Modified:
    lld/trunk/ELF/Driver.cpp
    lld/trunk/test/ELF/emulation.s

Modified: lld/trunk/ELF/Driver.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/Driver.cpp?rev=275236&r1=275235&r2=275236&view=diff
==============================================================================
--- lld/trunk/ELF/Driver.cpp (original)
+++ lld/trunk/ELF/Driver.cpp Tue Jul 12 18:28:33 2016
@@ -62,6 +62,7 @@ static std::pair<ELFKind, uint16_t> pars
       StringSwitch<std::pair<ELFKind, uint16_t>>(S)
           .Case("aarch64linux", {ELF64LEKind, EM_AARCH64})
           .Case("armelf_linux_eabi", {ELF32LEKind, EM_ARM})
+          .Case("elf32_x86_64", {ELF32LEKind, EM_X86_64})
           .Case("elf32btsmip", {ELF32BEKind, EM_MIPS})
           .Case("elf32ltsmip", {ELF32LEKind, EM_MIPS})
           .Case("elf32ppc", {ELF32BEKind, EM_PPC})
@@ -512,7 +513,7 @@ template <class ELFT> void LinkerDriver:
   LinkerScript<ELFT> LS;
   Script<ELFT>::X = &LS;
 
-  Config->Rela = ELFT::Is64Bits;
+  Config->Rela = ELFT::Is64Bits || Config->EMachine == EM_X86_64;
   Config->Mips64EL =
       (Config->EMachine == EM_MIPS && Config->EKind == ELF64LEKind);
 

Modified: lld/trunk/test/ELF/emulation.s
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/ELF/emulation.s?rev=275236&r1=275235&r2=275236&view=diff
==============================================================================
--- lld/trunk/test/ELF/emulation.s (original)
+++ lld/trunk/test/ELF/emulation.s Tue Jul 12 18:28:33 2016
@@ -29,6 +29,37 @@
 # X86-64-NEXT:   StringTableSectionIndex:
 # X86-64-NEXT: }
 
+# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux-gnux32 %s -o %tx32
+# RUN: ld.lld -m elf32_x86_64 %tx32 -o %t2x32
+# RUN: llvm-readobj -file-headers %t2x32 | FileCheck --check-prefix=X32 %s
+# RUN: ld.lld %tx32 -o %t3x32
+# RUN: llvm-readobj -file-headers %t3x32 | FileCheck --check-prefix=X32 %s
+# X32:      ElfHeader {
+# X32-NEXT:   Ident {
+# X32-NEXT:     Magic: (7F 45 4C 46)
+# X32-NEXT:     Class: 32-bit (0x1)
+# X32-NEXT:     DataEncoding: LittleEndian (0x1)
+# X32-NEXT:     FileVersion: 1
+# X32-NEXT:     OS/ABI: SystemV (0x0)
+# X32-NEXT:     ABIVersion: 0
+# X32-NEXT:     Unused: (00 00 00 00 00 00 00)
+# X32-NEXT:   }
+# X32-NEXT:   Type: Executable (0x2)
+# X32-NEXT:   Machine: EM_X86_64 (0x3E)
+# X32-NEXT:   Version: 1
+# X32-NEXT:   Entry:
+# X32-NEXT:   ProgramHeaderOffset: 0x34
+# X32-NEXT:   SectionHeaderOffset:
+# X32-NEXT:   Flags [ (0x0)
+# X32-NEXT:   ]
+# X32-NEXT:   HeaderSize: 52
+# X32-NEXT:   ProgramHeaderEntrySize: 32
+# X32-NEXT:   ProgramHeaderCount:
+# X32-NEXT:   SectionHeaderEntrySize: 40
+# X32-NEXT:   SectionHeaderCount:
+# X32-NEXT:   StringTableSectionIndex:
+# X32-NEXT: }
+
 # RUN: llvm-mc -filetype=obj -triple=i686-unknown-linux %s -o %tx86
 # RUN: ld.lld -m elf_i386 %tx86 -o %t2x86
 # RUN: llvm-readobj -file-headers %t2x86 | FileCheck --check-prefix=X86 %s

Added: lld/trunk/test/ELF/x86-64-rela.s
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/ELF/x86-64-rela.s?rev=275236&view=auto
==============================================================================
--- lld/trunk/test/ELF/x86-64-rela.s (added)
+++ lld/trunk/test/ELF/x86-64-rela.s Tue Jul 12 18:28:33 2016
@@ -0,0 +1,11 @@
+// REQUIRES: x86
+// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
+// RUN: ld.lld %t.o -o %t.so -shared
+// RUN: llvm-readobj -dynamic-table %t.so | FileCheck %s
+// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux-gnux32 %s -o %t.o
+// RUN: ld.lld %t.o -o %t.so -shared
+// RUN: llvm-readobj -dynamic-table %t.so | FileCheck %s
+
+        call foo at plt
+
+// CHECK:  0x{{0+}}14 PLTREL{{ +}}RELA