arm-got-relative.s
1.59 KB
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
// REQUIRES: arm
// RUN: llvm-mc -position-independent -filetype=obj -triple=armv7a-none-linux-gnueabi %s -o %t.o
// RUN: ld.lld %t.o -shared -o %t
// RUN: llvm-readobj -S --symbols --dyn-relocations %t | FileCheck %s
// RUN: llvm-objdump -d -triple=armv7a-none-linux-gnueabi %t | FileCheck -check-prefix=CODE %s
.syntax unified
.text
.globl _start
.align 2
_start:
.type _start, %function
ldr r3, .LGOT
ldr r2, .LGOT+4
.LPIC:
add r0, pc, r3
bx lr
.align 2
.LGOT:
// gas implicitly uses (R_ARM_BASE_PREL) for _GLOBAL_OFFSET_TABLE_ in PIC
// llvm-mc generates R_ARM_REL32, this will need updating when MC changes
.word _GLOBAL_OFFSET_TABLE_ - (.LPIC+8)
.word function(GOT)
.globl function
.align 2
function:
.type function, %function
bx lr
// CHECK: Dynamic Relocations {
// CHECK-NEXT: 0x220C R_ARM_GLOB_DAT function 0x0
// CHECK: Name: _GLOBAL_OFFSET_TABLE_
// CHECK-NEXT: Value: 0x220C
// CHECK-NEXT: Size:
// CHECK-NEXT: Binding: Local
// CHECK-NEXT: Type: None
// CHECK-NEXT: Other [
// CHECK-NEXT: STV_HIDDEN
// CHECK-NEXT: ]
// CHECK-NEXT: Section: .got
// CODE: Disassembly of section .text:
// CODE-EMPTY:
// CODE-NEXT: _start:
// CODE-NEXT: 11a0: 08 30 9f e5 ldr r3, [pc, #8]
// CODE-NEXT: 11a4: 08 20 9f e5 ldr r2, [pc, #8]
// CODE-NEXT: 11a8: 03 00 8f e0 add r0, pc, r3
// CODE-NEXT: 11ac: 1e ff 2f e1 bx lr
// CODE:$d.1:
// (_GLOBAL_OFFSET_TABLE_ = 0x220c) - (0x11a8 + 8) = 0x105c
// CODE-NEXT: 11b0: 5c 10 00 00
// (Got(function) - GotBase = 0x0
// CODE-NEXT: 11b4: 00 00 00 00