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llvm-project/lld/test/ELF/tls-i686.s

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[ELF/x86] Implemented R_386_TLS_LE_32, R_386_TLS_LE relocations. This patch implements next relocations: R_386_TLS_LE - Negative offset relative to static TLS (GNU version). R_386_TLS_LE_32 - Offset relative to static TLS block. These ones are created when using next code sequences: * @tpoff - The operator must be used to compute an immediate value. The linker will report an error if the referenced variable is not defined or it is not code for the executable itself. No GOT entry is created in this case. * @ntpoff Calculate the negative offset of the variable it is added to relative to the static TLS block. The operator must be used to compute an immediate value. The linker will report an error if the referenced variable is not defined or it is not code for the executable itself. No GOT entry is created in this case. Information was found in Ulrich Drepper, ELF Handling For Thread-Local Storage, http://www.akkadia.org/drepper/tls.pdf, (6.2, p76) Differential revision: http://reviews.llvm.org/D14930 llvm-svn: 254090
2015-11-26 04:41:53 +08:00
// REQUIRES: x86
// RUN: llvm-mc -filetype=obj -triple=i686-pc-linux %s -o %t
// RUN: ld.lld %t -o %tout
// RUN: ld.lld %t -shared -o %tsharedout
// RUN: llvm-objdump -d %tout | FileCheck %s --check-prefix=DIS
// RUN: llvm-readobj -r %tout | FileCheck %s --check-prefix=RELOC
// RUN: llvm-objdump -d %tsharedout | FileCheck %s --check-prefix=DISSHARED
// RUN: llvm-readobj -r %tsharedout | FileCheck %s --check-prefix=RELOCSHARED
.section ".tdata", "awT", @progbits
.globl var
.globl var1
var:
.long 0
var1:
.long 1
.text
.global _start
_start:
movl $var@tpoff, %edx
movl %gs:0, %ecx
subl %edx, %eax
movl $var1@tpoff, %edx
movl %gs:0, %ecx
subl %edx, %eax
movl %gs:0, %ecx
leal var@ntpoff(%ecx), %eax
movl %gs:0, %ecx
leal var1@ntpoff(%ecx), %eax
// DIS: Disassembly of section .text:
// DIS-NEXT: _start:
// DIS-NEXT: 11000: ba 08 00 00 00 movl $8, %edx
// DIS-NEXT: 11005: 65 8b 0d 00 00 00 00 movl %gs:0, %ecx
// DIS-NEXT: 1100c: 29 d0 subl %edx, %eax
// DIS-NEXT: 1100e: ba 04 00 00 00 movl $4, %edx
// DIS-NEXT: 11013: 65 8b 0d 00 00 00 00 movl %gs:0, %ecx
// DIS-NEXT: 1101a: 29 d0 subl %edx, %eax
// DIS-NEXT: 1101c: 65 8b 0d 00 00 00 00 movl %gs:0, %ecx
// DIS-NEXT: 11023: 8d 81 f8 ff ff ff leal -8(%ecx), %eax
// DIS-NEXT: 11029: 65 8b 0d 00 00 00 00 movl %gs:0, %ecx
// DIS-NEXT: 11030: 8d 81 fc ff ff ff leal -4(%ecx), %eax
// RELOC: Relocations [
// RELOC-NEXT: ]
// DISSHARED: Disassembly of section .text:
// DISSHARED-NEXT: _start:
// DISSHARED-NEXT: 1000: ba 00 00 00 00 movl $0, %edx
// DISSHARED-NEXT: 1005: 65 8b 0d 00 00 00 00 movl %gs:0, %ecx
// DISSHARED-NEXT: 100c: 29 d0 subl %edx, %eax
// DISSHARED-NEXT: 100e: ba 00 00 00 00 movl $0, %edx
// DISSHARED-NEXT: 1013: 65 8b 0d 00 00 00 00 movl %gs:0, %ecx
// DISSHARED-NEXT: 101a: 29 d0 subl %edx, %eax
// DISSHARED-NEXT: 101c: 65 8b 0d 00 00 00 00 movl %gs:0, %ecx
// DISSHARED-NEXT: 1023: 8d 81 00 00 00 00 leal (%ecx), %eax
// DISSHARED-NEXT: 1029: 65 8b 0d 00 00 00 00 movl %gs:0, %ecx
// DISSHARED-NEXT: 1030: 8d 81 00 00 00 00 leal (%ecx), %eax
// RELOCSHARED: Relocations [
// RELOCSHARED-NEXT: Section (4) .rel.dyn {
// RELOCSHARED-NEXT: 0x1001 R_386_TLS_TPOFF32 var 0x0
// RELOCSHARED-NEXT: 0x100F R_386_TLS_TPOFF32 var1 0x0
// RELOCSHARED-NEXT: 0x1025 R_386_TLS_TPOFF var 0x0
// RELOCSHARED-NEXT: 0x1032 R_386_TLS_TPOFF var1 0x0
// RELOCSHARED-NEXT: }
// RELOCSHARED-NEXT: ]