[ELF][RISCV] Parse BFD names elf{32,64}-littleriscv

e.g. glibc libc.so on riscv64 uses `OUTPUT_FORMAT(elf64-littleriscv)`.

Reviewed By: ruiu

Differential Revision: https://reviews.llvm.org/D63070

llvm-svn: 362922

2 files changed, 76 insertions, 0 deletions

diff --git a/lld/ELF/ScriptParser.cpp b/lld/ELF/ScriptParser.cpp
index c4a389a3c88..0ab2a96c9c8 100644
--- a/lld/ELF/ScriptParser.cpp
+++ b/lld/ELF/ScriptParser.cpp
@@ -401,6 +401,8 @@ static std::pair<ELFKind, uint16_t> parseBfdName(StringRef S) {
       .Case("elf32-ntradlittlemips", {ELF32LEKind, EM_MIPS})
       .Case("elf64-tradbigmips", {ELF64BEKind, EM_MIPS})
       .Case("elf64-tradlittlemips", {ELF64LEKind, EM_MIPS})
+      .Case("elf32-littleriscv", {ELF32LEKind, EM_RISCV})
+      .Case("elf64-littleriscv", {ELF64LEKind, EM_RISCV})
       .Default({ELFNoneKind, EM_NONE});
 }
 
diff --git a/lld/test/ELF/emulation-riscv.s b/lld/test/ELF/emulation-riscv.s
new file mode 100644
index 00000000000..7522b54d142
--- /dev/null
+++ b/lld/test/ELF/emulation-riscv.s
@@ -0,0 +1,74 @@
+# REQUIRES: riscv
+
+# RUN: llvm-mc -filetype=obj -triple=riscv32 %s -o %t.o
+# RUN: ld.lld %t.o -o %t
+# RUN: llvm-readobj --file-headers %t | FileCheck --check-prefix=RV32 %s
+# RUN: ld.lld -m elf32lriscv %t.o -o %t
+# RUN: llvm-readobj --file-headers %t | FileCheck --check-prefix=RV32 %s
+# RUN: echo 'OUTPUT_FORMAT(elf32-littleriscv)' > %t.script
+# RUN: ld.lld %t.script %t.o -o %t
+# RUN: llvm-readobj --file-headers %t | FileCheck --check-prefix=RV32 %s
+
+# RV32:      ElfHeader {
+# RV32-NEXT:   Ident {
+# RV32-NEXT:     Magic: (7F 45 4C 46)
+# RV32-NEXT:     Class: 32-bit (0x1)
+# RV32-NEXT:     DataEncoding: LittleEndian (0x1)
+# RV32-NEXT:     FileVersion: 1
+# RV32-NEXT:     OS/ABI: SystemV (0x0)
+# RV32-NEXT:     ABIVersion: 0
+# RV32-NEXT:     Unused: (00 00 00 00 00 00 00)
+# RV32-NEXT:   }
+# RV32-NEXT:   Type: Executable (0x2)
+# RV32-NEXT:   Machine: EM_RISCV (0xF3)
+# RV32-NEXT:   Version: 1
+# RV32-NEXT:   Entry:
+# RV32-NEXT:   ProgramHeaderOffset: 0x34
+# RV32-NEXT:   SectionHeaderOffset:
+# RV32-NEXT:   Flags [ (0x0)
+# RV32-NEXT:   ]
+# RV32-NEXT:   HeaderSize: 52
+# RV32-NEXT:   ProgramHeaderEntrySize: 32
+# RV32-NEXT:   ProgramHeaderCount:
+# RV32-NEXT:   SectionHeaderEntrySize: 40
+# RV32-NEXT:   SectionHeaderCount:
+# RV32-NEXT:   StringTableSectionIndex:
+# RV32-NEXT: }
+
+# RUN: llvm-mc -filetype=obj -triple=riscv64 %s -o %t.o
+# RUN: ld.lld %t.o -o %t
+# RUN: llvm-readobj --file-headers %t | FileCheck --check-prefix=RV64 %s
+# RUN: ld.lld -m elf64lriscv %t.o -o %t
+# RUN: llvm-readobj --file-headers %t | FileCheck --check-prefix=RV64 %s
+# RUN: echo 'OUTPUT_FORMAT(elf64-littleriscv)' > %t.script
+# RUN: ld.lld %t.script %t.o -o %t
+# RUN: llvm-readobj --file-headers %t | FileCheck --check-prefix=RV64 %s
+
+# RV64:      ElfHeader {
+# RV64-NEXT:   Ident {
+# RV64-NEXT:     Magic: (7F 45 4C 46)
+# RV64-NEXT:     Class: 64-bit (0x2)
+# RV64-NEXT:     DataEncoding: LittleEndian (0x1)
+# RV64-NEXT:     FileVersion: 1
+# RV64-NEXT:     OS/ABI: SystemV (0x0)
+# RV64-NEXT:     ABIVersion: 0
+# RV64-NEXT:     Unused: (00 00 00 00 00 00 00)
+# RV64-NEXT:   }
+# RV64-NEXT:   Type: Executable (0x2)
+# RV64-NEXT:   Machine: EM_RISCV (0xF3)
+# RV64-NEXT:   Version: 1
+# RV64-NEXT:   Entry:
+# RV64-NEXT:   ProgramHeaderOffset: 0x40
+# RV64-NEXT:   SectionHeaderOffset:
+# RV64-NEXT:   Flags [ (0x0)
+# RV64-NEXT:   ]
+# RV64-NEXT:   HeaderSize: 64
+# RV64-NEXT:   ProgramHeaderEntrySize: 56
+# RV64-NEXT:   ProgramHeaderCount:
+# RV64-NEXT:   SectionHeaderEntrySize: 64
+# RV64-NEXT:   SectionHeaderCount:
+# RV64-NEXT:   StringTableSectionIndex:
+# RV64-NEXT: }
+
+.globl _start
+_start: