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llvm-project/llvm/test/MC/X86/tlsdesc-64.s

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[X86] Fix x86-64 call *foo@tlsdesc(%rax) and support R_386_TLSGOTDESC R_386_TLS_DESC_CALL D18885 emitted 5 bytes for call *foo@tlsdesc(%rax). It should use the 2-byte form instead and let R_X86_64_TLSDESC_CALL apply to the beginning of the call instruction. The 2-byte form was deliberately chosen to make ->LE and ->IE relaxation work: 0: 48 8d 05 00 00 00 00 lea 0x0(%rip),%rax # 7 <.text+0x7> 3: R_X86_64_GOTPC32_TLSDESC a-0x4 7: ff 10 callq *(%rax) 7: R_X86_64_TLSDESC_CALL a => 0: 48 c7 c0 fc ff ff ff mov $0xfffffffffffffffc,%rax 7: 66 90 xchg %ax,%ax Also change the symbol type to STT_TLS when VK_TLSCALL or VK_TLSDESC is seen. Reviewed By: compnerd Differential Revision: https://reviews.llvm.org/D62512 llvm-svn: 361910
2019-05-29 10:02:59 +08:00
# RUN: llvm-mc -triple x86_64-pc-linux-musl %s | FileCheck --check-prefix=PRINT %s
# RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-musl %s -o %t
# RUN: llvm-readelf -s %t | FileCheck --check-prefix=SYM %s
# RUN: llvm-objdump -dr --no-show-raw-insn %t | FileCheck --match-full-lines %s
# PRINT: leaq a@tlsdesc(%rip), %rax
# PRINT-NEXT: callq *a@tlscall(%rax)
# SYM: TLS GLOBAL DEFAULT UND a
# CHECK: 0: leaq (%rip), %rax
[llvm-objdump] Print relocation addends in hexadecimal Summary: Matches GNU objdump. Makes debugging easier for me as I'm working out addresses from symbol+addend, so it would be good to be calculating in a single format. Reviewers: MaskRay, grimar, jhenderson, bd1976llvm Reviewed By: jhenderson Subscribers: sdardis, jrtc27, atanasyan, rupprecht, seiya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D69997
2019-11-19 19:58:50 +08:00
# CHECK-NEXT: 0000000000000003: R_X86_64_GOTPC32_TLSDESC a-0x4
[X86] Fix x86-64 call *foo@tlsdesc(%rax) and support R_386_TLSGOTDESC R_386_TLS_DESC_CALL D18885 emitted 5 bytes for call *foo@tlsdesc(%rax). It should use the 2-byte form instead and let R_X86_64_TLSDESC_CALL apply to the beginning of the call instruction. The 2-byte form was deliberately chosen to make ->LE and ->IE relaxation work: 0: 48 8d 05 00 00 00 00 lea 0x0(%rip),%rax # 7 <.text+0x7> 3: R_X86_64_GOTPC32_TLSDESC a-0x4 7: ff 10 callq *(%rax) 7: R_X86_64_TLSDESC_CALL a => 0: 48 c7 c0 fc ff ff ff mov $0xfffffffffffffffc,%rax 7: 66 90 xchg %ax,%ax Also change the symbol type to STT_TLS when VK_TLSCALL or VK_TLSDESC is seen. Reviewed By: compnerd Differential Revision: https://reviews.llvm.org/D62512 llvm-svn: 361910
2019-05-29 10:02:59 +08:00
# CHECK-NEXT: 7: callq *(%rax)
# CHECK-NEXT: 0000000000000007: R_X86_64_TLSDESC_CALL a
leaq a@tlsdesc(%rip), %rax
call *a@tlscall(%rax)
addq %fs:0, %rax