130 lines
4.2 KiB
Plaintext
130 lines
4.2 KiB
Plaintext
# This test exercises a simple general dynamic TLS access model in X86_64.
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#
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# It is composed of two parts: a program and a shared library. The shared
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# library uses TLS, but the program does not.
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#
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# The shared library should import __tls_get_addr, since it uses the general
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# dynamic TLS access mode (see www.akkadia.org/drepper/tls.pdf). Notice that
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# once we support TLS strength reduction, this test should be updated, since
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# this can be converted into a local dynamic TLS model.
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# Prepare inputs
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#RUN: yaml2obj -format=elf %p/Inputs/generaltls-so.o.yaml -o=%t.o.so
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#RUN: lld -flavor gnu -target x86_64 -shared %t.o.so -o %T/libgeneraltls.so
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#RUN: yaml2obj -format=elf %s -o=%t.o
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# Link - (we supply --defsym=__tls_get_addr to avoid the need to link with
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# system libraries)
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#RUN: lld -flavor gnu -target x86_64 -e main %t.o -L%T -lgeneraltls -o %t1 \
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#RUN: --defsym=__tls_get_addr=0
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# Check
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#RUN: llvm-readobj -dyn-symbols %t1 | FileCheck -check-prefix CHECKPROG %s
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#RUN: llvm-readobj -relocations -dyn-symbols %T/libgeneraltls.so | FileCheck \
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#RUN: -check-prefix CHECKDSO %s
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# Test case generated with the following code:
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#
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# DSO: (file %p/Inputs/generaltls-so.o.yaml)
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#
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# __thread int mynumber=33;
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#
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# int getnumber() {
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# return mynumber;
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# }
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#
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# Program: (this file). Note: The printf() relocation was removed to simplify
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# this test and allow us to test this without libc.
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#
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# #include <stdio.h>
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# int getnumber();
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#
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# int main() {
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# printf("getnumber() = %d\n", getnumber());
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# return 0;
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# }
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#
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---
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FileHeader:
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Class: ELFCLASS64
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Data: ELFDATA2LSB
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OSABI: ELFOSABI_GNU
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Type: ET_REL
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Machine: EM_X86_64
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Sections:
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- Name: .text
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
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AddressAlign: 0x0000000000000010
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Content: 554889E54883EC10C745FC00000000B000E80000000048BF000000000000000089C6B000E80000000031F68945F889F04883C4105DC3
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- Name: .rela.text
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Type: SHT_RELA
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Link: .symtab
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AddressAlign: 0x0000000000000008
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Info: .text
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Relocations:
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- Offset: 0x0000000000000012
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Symbol: getnumber
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Type: R_X86_64_PC32
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Addend: -4
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- Offset: 0x0000000000000018
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Symbol: .rodata.str1.1
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Type: R_X86_64_64
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Addend: 0
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- Name: .data
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Type: SHT_PROGBITS
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Flags: [ SHF_WRITE, SHF_ALLOC ]
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AddressAlign: 0x0000000000000004
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Content: ''
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- Name: .bss
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Type: SHT_NOBITS
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Flags: [ SHF_WRITE, SHF_ALLOC ]
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AddressAlign: 0x0000000000000004
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Content: ''
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- Name: .rodata.str1.1
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC, SHF_MERGE, SHF_STRINGS ]
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AddressAlign: 0x0000000000000001
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Content: 6765746E756D6265722829203D2025640A00
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Symbols:
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Local:
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- Name: .text
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Type: STT_SECTION
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Section: .text
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- Name: .data
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Type: STT_SECTION
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Section: .data
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- Name: .bss
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Type: STT_SECTION
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Section: .bss
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- Name: .rodata.str1.1
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Type: STT_SECTION
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Section: .rodata.str1.1
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Global:
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- Name: main
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Type: STT_FUNC
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Section: .text
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Size: 0x0000000000000036
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- Name: getnumber
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# Program should import the function defined in the shared library
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#CHECKPROG: getnumber@
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# Program should not import __tls_get_addr, since it does not directly use TLS
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#CHECKPROG-NOT: __tls_get_addr@
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# Check for the presence of X86_64 TLS relocations in the shared library
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#CHECKDSO: R_X86_64_DTPMOD64
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#CHECKDSO: R_X86_64_DTPOFF64
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#CHECKDSO: R_X86_64_JUMP_SLOT
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# The shared library should import __tls_get_addr, since it uses the general
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# dynamic TLS access mode.
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#CHECKDSO: Name: __tls_get_addr@
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#CHECKDSO-NEXT: Value: 0x0
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#CHECKDSO-NEXT: Size: 0
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#CHECKDSO-NEXT: Binding: Global
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#CHECKDSO-NEXT: Type: None
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#CHECKDSO-NEXT: Other: 0
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#CHECKDSO-NEXT: Section: Undefined
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