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llvm-project/lld/test/ELF/ppc64-plt-stub.s

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[ELF][PPC] Refactor some ppc64 tests Merge ppc64-dynamic-relocations.s into ppc64-plt-stub.s Add ppc64-tls-ie.s: covers ppc64-initial-exec-tls.s and ppc64-tls-ie-le.s Add ppc64-tls-gd.s: covers ppc64-general-dynamic-tls.s, ppc64-gd-to-ie.s, ppc64-tls-gd-le.s, and ppc64-tls-gd-le-small.s llvm-svn: 366424
2019-07-18 18:43:07 +08:00
# REQUIRES: ppc
# RUN: llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux %s -o %t.o
# RUN: llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux %p/Inputs/shared-ppc64.s -o %t2.o
# RUN: ld.lld -shared %t2.o -soname=t2.so -o %t2.so
# RUN: ld.lld %t.o %t2.so -o %t
# RUN: llvm-readelf -S -d %t | FileCheck --check-prefix=SEC %s
# RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s
# RUN: llvm-mc -filetype=obj -triple=powerpc64-unknown-linux %s -o %t.o
# RUN: llvm-mc -filetype=obj -triple=powerpc64-unknown-linux %p/Inputs/shared-ppc64.s -o %t2.o
# RUN: ld.lld -shared %t2.o -soname=t2.so -o %t2.so
# RUN: ld.lld %t.o %t2.so -o %t
# RUN: llvm-readelf -S -d %t | FileCheck --check-prefix=SEC %s
# RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck %s
## DT_PLTGOT points to .plt
# SEC: .plt NOBITS 0000000010030000 030000 000018
# SEC: 0x0000000000000003 (PLTGOT) 0x10030000
## .plt[0] holds the address of _dl_runtime_resolve.
## .plt[1] holds the link map.
## The JMP_SLOT relocation is stored at .plt[2]
# RELOC: 0x10030010 R_PPC64_JMP_SLOT foo 0x0
# CHECK: _start:
# CHECK: 10010008: bl .+16
# CHECK-LABEL: 0000000010010018 __plt_foo:
# CHECK-NEXT: std 2, 24(1)
# CHECK-NEXT: addis 12, 2, 0
# CHECK-NEXT: ld 12, 32560(12)
# CHECK-NEXT: mtctr 12
# CHECK-NEXT: bctr
[PPC64] Emit plt call stubs to the text section rather then the plt section. On PowerPC calls to functions through the plt must be done through a call stub that is responsible for: 1) Saving the toc pointer to the stack. 2) Loading the target functions address from the plt into both r12 and the count register. 3) Indirectly branching to the target function. Previously we have been emitting these call stubs to the .plt section, however the .plt section should be reserved for the lazy symbol resolution stubs. This patch moves the call stubs to the text section by moving the implementation from writePlt to the thunk framework. Differential Revision: https://reviews.llvm.org/D46204 llvm-svn: 331607
2018-05-07 03:13:29 +08:00
[PPC64] Write plt stubs for ElfV2 abi Add the default version of a plt stub for the V2 Elf abi. Differential Revision: https://reviews.llvm.org/D44850 llvm-svn: 329004
2018-04-03 03:17:12 +08:00
.text
.abiversion 2
.globl _start
.p2align 4
.type _start,@function
_start:
.Lfunc_begin0:
.Lfunc_gep0:
addis 2, 12, .TOC.-.Lfunc_gep0@ha
addi 2, 2, .TOC.-.Lfunc_gep0@l
.Lfunc_lep0:
.localentry _start, .Lfunc_lep0-.Lfunc_gep0
bl foo
nop
li 0, 1
sc
.size _start, .-.Lfunc_begin0