test/old-elf/Mips/rel-dynamic-04.test

# Conditions:
#   a) Linking a non-shared executable file.
#   b) Relocations' targets are symbols defined in the shared object.
#   c) Relocations modify a writable section.
#   d) The first symbol is referenced by R_MIPS32 relocation only
#   e) The second symbol is referenced by R_MIPS_32 and R_MIPS26 relocations.
#   f) The third symbol is referenced by R_MIPS26 and R_MIPS_32 relocations.
# Check:
#   a) There should be the only R_MIPS_REL32 relocation.
#   b) Linker creates a couple of PLT entry for both symbols referenced
#      by the R_MIPS_26 branch relocation.
#   c) STO_MIPS_PLT flag in the dynamic symbol table for symbols require
#      a pointer equality.
#
# RUN: yaml2obj -format=elf -docnum 1 %s > %t-so.o
# RUN: lld -flavor old-gnu -target mipsel -shared -o %t.so %t-so.o
# RUN: yaml2obj -format=elf -docnum 2 %s > %t-o.o
# RUN: lld -flavor old-gnu -target mipsel -e T0 -o %t.exe %t-o.o %t.so
# RUN: llvm-readobj -dt -r -s %t.exe | FileCheck -check-prefix=PLT %s
# RUN: llvm-readobj -mips-plt-got %t.exe | FileCheck -check-prefix=GOT %s

# PLT:      Section {
# PLT:        Index: 5
# PLT-NEXT:   Name: .rel.dyn (31)
# PLT-NEXT:    Type: SHT_REL (0x9)
# PLT-NEXT:    Flags [ (0x2)
# PLT-NEXT:      SHF_ALLOC (0x2)
# PLT-NEXT:    ]
# PLT-NEXT:    Address: 0x40109C
# PLT-NEXT:    Offset: 0x109C
# PLT-NEXT:    Size: 8
# PLT-NEXT:    Link: 3
# PLT-NEXT:    Info: 0
# PLT-NEXT:    AddressAlignment: 4
# PLT-NEXT:    EntrySize: 8
# PLT-NEXT:  }
# PLT-NEXT:  Section {
# PLT-NEXT:    Index: 6
# PLT-NEXT:    Name: .rel.plt (40)
# PLT-NEXT:    Type: SHT_REL (0x9)
# PLT-NEXT:    Flags [ (0x2)
# PLT-NEXT:      SHF_ALLOC (0x2)
# PLT-NEXT:    ]
# PLT-NEXT:    Address: 0x4010A4
# PLT-NEXT:    Offset: 0x10A4
# PLT-NEXT:    Size: 16
# PLT-NEXT:    Link: 3
# PLT-NEXT:    Info: 0
# PLT-NEXT:    AddressAlignment: 4
# PLT-NEXT:    EntrySize: 8
# PLT-NEXT:  }
# PLT-NEXT:  Section {
# PLT-NEXT:    Index: 7
# PLT-NEXT:    Name: .plt (49)
# PLT-NEXT:    Type: SHT_PROGBITS (0x1)
# PLT-NEXT:    Flags [ (0x6)
# PLT-NEXT:      SHF_ALLOC (0x2)
# PLT-NEXT:      SHF_EXECINSTR (0x4)
# PLT-NEXT:    ]
# PLT-NEXT:    Address: 0x4010C0
# PLT-NEXT:    Offset: 0x10C0
# PLT-NEXT:    Size: 64
# PLT-NEXT:    Link: 0
# PLT-NEXT:    Info: 0
# PLT-NEXT:    AddressAlignment: 16
# PLT-NEXT:    EntrySize: 0
# PLT-NEXT:  }

# PLT:      Relocations [
# PLT-NEXT:   Section (5) .rel.dyn {
# PLT-NEXT:     0x400120 R_MIPS_REL32 T1 0x0
# PLT-NEXT:   }
# PLT-NEXT:   Section (6) .rel.plt {
# PLT-NEXT:     0x403008 R_MIPS_JUMP_SLOT T2 0x0
# PLT-NEXT:     0x40300C R_MIPS_JUMP_SLOT T3 0x0
# PLT-NEXT:   }
# PLT-NEXT: ]

# PLT:      DynamicSymbols [
# PLT-NEXT:   Symbol {
# PLT-NEXT:     Name: @ (0)
# PLT-NEXT:     Value: 0x0
# PLT-NEXT:     Size: 0
# PLT-NEXT:     Binding: Local (0x0)
# PLT-NEXT:     Type: None (0x0)
# PLT-NEXT:     Other: 0
# PLT-NEXT:     Section: Undefined (0x0)
# PLT-NEXT:   }
# PLT-NEXT:   Symbol {
# PLT-NEXT:     Name: T2@ (4)
# PLT-NEXT:     Value: 0x4010E0
# PLT-NEXT:     Size: 0
# PLT-NEXT:     Binding: Global (0x1)
# PLT-NEXT:     Type: Function (0x2)
# PLT-NEXT:     Other: 8
# PLT-NEXT:     Section: Undefined (0x0)
# PLT-NEXT:   }
# PLT-NEXT:   Symbol {
# PLT-NEXT:     Name: T3@ (7)
# PLT-NEXT:     Value: 0x4010F0
# PLT-NEXT:     Size: 0
# PLT-NEXT:     Binding: Global (0x1)
# PLT-NEXT:     Type: Function (0x2)
# PLT-NEXT:     Other: 8
# PLT-NEXT:     Section: Undefined (0x0)
# PLT-NEXT:   }
# PLT-NEXT:   Symbol {
# PLT-NEXT:     Name: T1@ (1)
# PLT-NEXT:     Value: 0x0
# PLT-NEXT:     Size: 0
# PLT-NEXT:     Binding: Global (0x1)
# PLT-NEXT:     Type: Function (0x2)
# PLT-NEXT:     Other: 0
# PLT-NEXT:     Section: Undefined (0x0)
# PLT-NEXT:   }
# PLT-NEXT: ]

# GOT:      Local entries [
# GOT-NEXT: ]
# GOT-NEXT: Global entries [
# GOT-NEXT:   Entry {
# GOT-NEXT:     Address: 0x402008
# GOT-NEXT:     Access: -32744
# GOT-NEXT:     Initial: 0x0
# GOT-NEXT:     Value: 0x0
# GOT-NEXT:     Type: Function (0x2)
# GOT-NEXT:     Section: Undefined (0x0)
# GOT-NEXT:     Name: T1@ (1)
# GOT-NEXT:   }
# GOT-NEXT: ]

# so.o
---
FileHeader:
  Class:   ELFCLASS32
  Data:    ELFDATA2LSB
  Type:    ET_REL
  Machine: EM_MIPS
  Flags:   [EF_MIPS_PIC, EF_MIPS_CPIC, EF_MIPS_ABI_O32, EF_MIPS_ARCH_32]

Sections:
- Name:         .text
  Type:         SHT_PROGBITS
  Size:         0x0C
  AddressAlign: 16
  Flags:        [SHF_EXECINSTR, SHF_ALLOC]

Symbols:
  Global:
    - Name: T1
      Section: .text
      Type: STT_FUNC
      Value: 0x0
      Size: 4
    - Name: T2
      Section: .text
      Type: STT_FUNC
      Value: 0x4
      Size: 4
    - Name: T3
      Section: .text
      Type: STT_FUNC
      Value: 0x8
      Size: 4

# o.o
---
FileHeader: !FileHeader
  Class: ELFCLASS32
  Data: ELFDATA2LSB
  Type: ET_REL
  Machine: EM_MIPS
  Flags: [EF_MIPS_CPIC, EF_MIPS_ABI_O32, EF_MIPS_ARCH_32]

Sections:
- Name: .text
  Type: SHT_PROGBITS
  Size: 0x08
  AddressAlign: 16
  Flags: [SHF_WRITE, SHF_EXECINSTR, SHF_ALLOC]

- Name: .rel.text
  Type: SHT_REL
  Info: .text
  AddressAlign: 4
  Relocations:
    # There is no branch relocation for T1.
    - Offset: 0x00
      Symbol: T1
      Type: R_MIPS_32
    # The R_MIPS_32 relocation for T2 might produce R_MIPS_REL32 ...
    - Offset: 0x00
      Symbol: T2
      Type: R_MIPS_32
    # ... but R_MIPS_26 creates PLT entry and makes R_MIPS_REL32 redundant.
    - Offset: 0x04
      Symbol: T2
      Type: R_MIPS_26
    # Create PLT entry for T3 symbol.
    - Offset: 0x00
      Symbol: T3
      Type: R_MIPS_26
    # Take in account existing PLT entry and do not create R_MIPS_REL32.
    - Offset: 0x04
      Symbol: T3
      Type: R_MIPS_32

Symbols:
  Global:
    - Name: T0
      Section: .text
      Type: STT_FUNC
      Value: 0x0
      Size: 8
    - Name: T1
      Type: STT_FUNC
    - Name: T2
      Type: STT_FUNC
    - Name: T3
      Type: STT_FUNC
...