forked from OSchip/llvm-project
189 lines
4.8 KiB
Plaintext
189 lines
4.8 KiB
Plaintext
# Conditions:
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# a) Linking a non-shared executable file.
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# b) Relocations' targets are symbols defined in the shared object.
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# c) Relocations modify a read-only section.
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# d) The first symbol is referenced by R_MIPS32 relocation only
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# e) The second symbol is referenced by R_MIPS_32 and R_MIPS26 relocations.
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# f) The third symbol is referenced by R_MIPS26 and R_MIPS_32 relocations.
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# Check:
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# a) There should be no R_MIPS_REL32 relocations.
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# b) Linker creates PLT entries for all three relocations.
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# c) STO_MIPS_PLT flag in the dynamic symbol table for symbols require
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# a pointer equality.
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#
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# RUN: yaml2obj -format=elf -docnum 1 %s > %t-so.o
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# RUN: lld -flavor gnu -target mipsel -shared -o %t.so %t-so.o
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# RUN: yaml2obj -format=elf -docnum 2 %s > %t-o.o
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# RUN: lld -flavor gnu -target mipsel -e T0 -o %t.exe %t-o.o %t.so
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# RUN: llvm-readobj -dt -r -s %t.exe | FileCheck -check-prefix=PLT %s
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# PLT: Section {
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# PLT: Index: 5
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# PLT-NEXT: Name: .rel.plt (31)
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# PLT-NEXT: Type: SHT_REL (0x9)
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# PLT-NEXT: Flags [ (0x2)
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# PLT-NEXT: SHF_ALLOC (0x2)
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# PLT-NEXT: ]
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# PLT-NEXT: Address: 0x{{[0-9A-F]+}}
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# PLT-NEXT: Offset: 0x{{[0-9A-F]+}}
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# PLT-NEXT: Size: 24
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# PLT-NEXT: Link: 3
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# PLT-NEXT: Info: 0
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# PLT-NEXT: AddressAlignment: 4
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# PLT-NEXT: EntrySize: 8
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# PLT-NEXT: }
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# PLT-NEXT: Section {
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# PLT-NEXT: Index: 6
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# PLT-NEXT: Name: .plt (40)
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# PLT-NEXT: Type: SHT_PROGBITS (0x1)
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# PLT-NEXT: Flags [ (0x6)
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# PLT-NEXT: SHF_ALLOC (0x2)
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# PLT-NEXT: SHF_EXECINSTR (0x4)
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# PLT-NEXT: ]
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# PLT-NEXT: Address: 0x{{[0-9A-F]+}}
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# PLT-NEXT: Offset: 0x{{[0-9A-F]+}}
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# PLT-NEXT: Size: 80
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# PLT-NEXT: Link: 0
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# PLT-NEXT: Info: 0
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# PLT-NEXT: AddressAlignment: 16
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# PLT-NEXT: EntrySize: 0
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# PLT-NEXT: }
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# PLT: Relocations [
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# PLT-NEXT: Section (5) .rel.plt {
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# PLT-NEXT: {{[0-9A-F]+}} R_MIPS_JUMP_SLOT T1 0x0
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# PLT-NEXT: {{[0-9A-F]+}} R_MIPS_JUMP_SLOT T2 0x0
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# PLT-NEXT: {{[0-9A-F]+}} R_MIPS_JUMP_SLOT T3 0x0
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# PLT-NEXT: }
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# PLT-NEXT: ]
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# PLT: DynamicSymbols [
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# PLT-NEXT: Symbol {
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# PLT-NEXT: Name: @ (0)
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# PLT-NEXT: Value: 0x0
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# PLT-NEXT: Size: 0
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# PLT-NEXT: Binding: Local (0x0)
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# PLT-NEXT: Type: None (0x0)
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# PLT-NEXT: Other: 0
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# PLT-NEXT: Section: Undefined (0x0)
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# PLT-NEXT: }
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# PLT-NEXT: Symbol {
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# PLT-NEXT: Name: T1@ (1)
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# PLT-NEXT: Value: 0x{{[0-9A-F]+}}
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# PLT-NEXT: Size: 0
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# PLT-NEXT: Binding: Global (0x1)
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# PLT-NEXT: Type: Function (0x2)
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# PLT-NEXT: Other: 8
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# PLT-NEXT: Section: Undefined (0x0)
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# PLT-NEXT: }
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# PLT-NEXT: Symbol {
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# PLT-NEXT: Name: T2@ (4)
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# PLT-NEXT: Value: 0x{{[0-9A-F]+}}
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# PLT-NEXT: Size: 0
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# PLT-NEXT: Binding: Global (0x1)
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# PLT-NEXT: Type: Function (0x2)
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# PLT-NEXT: Other: 8
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# PLT-NEXT: Section: Undefined (0x0)
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# PLT-NEXT: }
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# PLT-NEXT: Symbol {
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# PLT-NEXT: Name: T3@ (7)
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# PLT-NEXT: Value: 0x{{[0-9A-F]+}}
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# PLT-NEXT: Size: 0
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# PLT-NEXT: Binding: Global (0x1)
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# PLT-NEXT: Type: Function (0x2)
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# PLT-NEXT: Other: 8
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# PLT-NEXT: Section: Undefined (0x0)
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# PLT-NEXT: }
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# PLT-NEXT: ]
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# so.o
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---
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FileHeader:
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Class: ELFCLASS32
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Data: ELFDATA2LSB
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Type: ET_REL
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Machine: EM_MIPS
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Flags: [EF_MIPS_PIC, EF_MIPS_CPIC, EF_MIPS_ABI_O32, EF_MIPS_ARCH_32]
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Sections:
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- Name: .text
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Type: SHT_PROGBITS
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Size: 0x0C
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AddressAlign: 16
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Flags: [SHF_EXECINSTR, SHF_ALLOC]
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Symbols:
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Global:
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- Name: T1
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Section: .text
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Type: STT_FUNC
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Value: 0x0
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Size: 4
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- Name: T2
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Section: .text
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Type: STT_FUNC
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Value: 0x4
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Size: 4
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- Name: T3
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Section: .text
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Type: STT_FUNC
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Value: 0x8
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Size: 4
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# o.o
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---
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FileHeader: !FileHeader
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Class: ELFCLASS32
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Data: ELFDATA2LSB
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Type: ET_REL
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Machine: EM_MIPS
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Flags: [EF_MIPS_CPIC, EF_MIPS_ABI_O32, EF_MIPS_ARCH_32]
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Sections:
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- Name: .text
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Type: SHT_PROGBITS
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Size: 0x08
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AddressAlign: 16
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Flags: [SHF_EXECINSTR, SHF_ALLOC]
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- Name: .rel.text
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Type: SHT_REL
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Info: .text
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AddressAlign: 4
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Relocations:
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# There is no branch relocation for T1.
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- Offset: 0x00
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Symbol: T1
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Type: R_MIPS_32
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# The R_MIPS_32 relocation for T2 might produce R_MIPS_REL32 ...
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- Offset: 0x00
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Symbol: T2
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Type: R_MIPS_32
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# ... but R_MIPS_26 creates PLT entry and makes R_MIPS_REL32 redundant.
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- Offset: 0x04
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Symbol: T2
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Type: R_MIPS_26
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# Create PLT entry for T3 symbol.
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- Offset: 0x00
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Symbol: T3
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Type: R_MIPS_26
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# Take in account existing PLT entry and do not create R_MIPS_REL32.
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- Offset: 0x04
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Symbol: T3
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Type: R_MIPS_32
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Symbols:
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Global:
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- Name: T0
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Section: .text
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Type: STT_FUNC
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Value: 0x0
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Size: 8
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- Name: T1
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Type: STT_FUNC
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- Name: T2
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Type: STT_FUNC
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- Name: T3
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Type: STT_FUNC
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...
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