case llvm::ELF::R_MIPS_NONE:
return {4, 0x0, 0, false};
case llvm::ELF::R_MIPS_64:
+ case llvm::ELF::R_MIPS_SUB:
return {8, 0xffffffffffffffffull, 0, false};
case llvm::ELF::R_MIPS_32:
case llvm::ELF::R_MIPS_GPREL32:
/// local/external: word64 S + A (truncate)
static uint64_t reloc64(uint64_t S, int64_t A) { return S + A; }
+/// \brief R_MIPS_SUB
+/// local/external: word64 S - A (truncate)
+static uint64_t relocSub(uint64_t S, int64_t A) { return S - A; }
+
/// \brief R_MIPS_PC32
/// local/external: word32 S + A i- P (truncate)
static uint32_t relocpc32(uint64_t P, uint64_t S, int64_t A) {
return reloc32(tgtAddr, ref.addend());
case R_MIPS_64:
return reloc64(tgtAddr, ref.addend());
+ case R_MIPS_SUB:
+ return relocSub(tgtAddr, ref.addend());
case R_MIPS_26:
return reloc26loc(relAddr, tgtAddr, ref.addend(), 2);
case R_MICROMIPS_26_S1:
--- /dev/null
+# Check handling of R_MIPS_SUB relocation.
+
+# RUN: yaml2obj -format=elf %s > %t.o
+# RUN: lld -flavor gnu -target mips64el -o %t.exe %t.o
+# RUN: llvm-objdump -s -t %t.exe | FileCheck %s
+
+# CHECK: Contents of section .data:
+# CHECK-NEXT: 120002000 cf010020 01000000 d0010020 0100ffff ... ....... ....
+# ^^ __start - 1 = 0x1200001cf
+# ^^ __start - 0x1000000000000
+# = 0Xffff0001200001d0
+# CHECK: SYMBOL TABLE:
+# CHECK: 00000001200001d0 g .rodata 00000008 __start
+
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_REL
+ Machine: EM_MIPS
+ Flags: [EF_MIPS_NOREORDER, EF_MIPS_PIC, EF_MIPS_CPIC, EF_MIPS_ARCH_64]
+
+Sections:
+- Name: .text
+ Type: SHT_PROGBITS
+ Size: 0x08
+ AddressAlign: 16
+ Flags: [SHF_ALLOC]
+- Name: .data
+ Type: SHT_PROGBITS
+ Size: 0x10
+ AddressAlign: 16
+ Flags: [SHF_ALLOC, SHF_WRITE]
+
+- Name: .rela.data
+ Type: SHT_RELA
+ Info: .data
+ AddressAlign: 4
+ Relocations:
+ - Offset: 0x0
+ Symbol: __start
+ Type: R_MIPS_SUB
+ Addend: 1
+ - Offset: 0x8
+ Symbol: __start
+ Type: R_MIPS_SUB
+ Addend: 0x1000000000000
+
+Symbols:
+ Global:
+ - Name: __start
+ Section: .text
+ Value: 0x0
+ Size: 8
+ - Name: data1
+ Section: .data
+ Value: 0x0
+ Size: 8
+ - Name: data2
+ Section: .data
+ Value: 0x8
+ Size: 8