1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
| # REQUIRES: ppc
# RUN: llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux %s -o %t.o
# RUN: llvm-readobj -r %t.o | FileCheck -check-prefix=RELOCS-LE %s
# RUN: ld.lld %t.o -o %t
# RUN: llvm-nm %t | FileCheck --check-prefix=NM %s
# RUN: llvm-readelf -x .got %t | FileCheck --check-prefix=HEX-LE %s
# RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck --check-prefix=CHECK %s
# RUN: llvm-mc -filetype=obj -triple=powerpc64-unknown-linux %s -o %t.o
# RUN: llvm-readobj -r %t.o | FileCheck -check-prefix=RELOCS-BE %s
# RUN: ld.lld %t.o -o %t
# RUN: llvm-nm %t | FileCheck --check-prefix=NM %s
# RUN: llvm-readelf -x .got %t | FileCheck --check-prefix=HEX-BE %s
# RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck --check-prefix=CHECK %s
# Make sure we calculate the offset correctly for a toc-relative access to a
# global variable as described by the PPC64 Elf V2 abi.
.abiversion 2
# int global_a = 55
.globl global_a
.section ".data"
.align 2
.type global_a, @object
.size global_a, 4
.p2align 2
global_a:
.long 41
.section ".text"
.align 2
.global _start
.type _start, @function
_start:
.Lfunc_gep0:
addis 2, 12, .TOC.-.Lfunc_gep0@ha
addi 2, 2, .TOC.-.Lfunc_gep0@l
.Lfunc_lep0:
.localentry _start, .Lfunc_lep0-.Lfunc_gep0
addis 3, 2, global_a@toc@ha
addi 3, 3, global_a@toc@l
li 0,1
lwa 3, 0(3)
sc
.size _start,.-_start
# Verify the relocations that get emitted for the global variable are the
# expected ones.
# RELOCS-LE: Relocations [
# RELOCS-LE-NEXT: .rela.text {
# RELOCS-LE: 0x8 R_PPC64_TOC16_HA global_a 0x0
# RELOCS-LE: 0xC R_PPC64_TOC16_LO global_a 0x0
# RELOCS-BE: Relocations [
# RELOCS-BE-NEXT: .rela.text {
# RELOCS-BE: 0xA R_PPC64_TOC16_HA global_a 0x0
# RELOCS-BE: 0xE R_PPC64_TOC16_LO global_a 0x0
# The .TOC. symbol represents the TOC base address: .got + 0x8000 = 0x10028000,
# which is stored in the first entry of .got
# NM: 00000000100281e8 d .TOC.
# NM: 00000000100301f0 D global_a
# HEX-LE: section '.got':
# HEX-LE-NEXT: 0x100201e8 e8810210 00000000
# HEX-BE: section '.got':
# HEX-BE-NEXT: 0x100201e8 00000000 100281e8
# r2 stores the TOC base address. To access global_a with r3, it
# computes the address with TOC plus an offset.
# global_a - .TOC. = 0x100301f0 - 0x100281e8 = (1 << 16) - 32760
# CHECK: _start:
# CHECK: 100101d0: addis 3, 2, 1
# CHECK-NEXT: 100101d4: addi 3, 3, -32760
|