1// REQUIRES: arm
2// RUN: llvm-mc -filetype=obj -triple=thumbv7a-none-linux-gnueabi %p/Inputs/arm-plt-reloc.s -o %t1
3// RUN: llvm-mc -filetype=obj -triple=thumbv7a-none-linux-gnueabi %s -o %t2
4// RUN: ld.lld %t1 %t2 -o %t
5// RUN: llvm-objdump --triple=thumbv7a-none-linux-gnueabi -d %t | FileCheck %s
6// RUN: ld.lld -shared %t1 %t2 -o %t.so
7// RUN: llvm-objdump --triple=thumbv7a-none-linux-gnueabi -d %t.so | FileCheck --check-prefix=DSO %s
8// RUN: llvm-readobj -S -r %t.so | FileCheck -check-prefix=DSOREL %s
9//
10// Test PLT entry generation
11 .syntax unified
12 .text
13 .align 2
14 .globl _start
15 .type  _start,%function
16_start:
17// FIXME, interworking is only supported for BL via BLX at the moment, when
18// interworking thunks are available for b.w and b<cond>.w this can be altered
19// to test the different forms of interworking.
20 bl func1
21 bl func2
22 bl func3
23
24// Executable, expect no PLT
25// CHECK: Disassembly of section .text:
26// CHECK-EMPTY:
27// CHECK-NEXT: <func1>:
28// CHECK-NEXT:   200b4: 70 47   bx      lr
29// CHECK: <func2>:
30// CHECK-NEXT:   200b6: 70 47   bx      lr
31// CHECK: <func3>:
32// CHECK-NEXT:   200b8: 70 47   bx      lr
33// CHECK-NEXT:   200ba: d4 d4
34// CHECK: <_start>:
35// . + 4 -12 = 0x200b4 = func1
36// CHECK-NEXT:   200bc: ff f7 fa ff     bl      #-12
37// . + 4 -14 = 0x200b6 = func2
38// CHECK-NEXT:   200c0: ff f7 f9 ff     bl      #-14
39// . + 4 -16 = 0x200b8 = func3
40// CHECK-NEXT:   200c4: ff f7 f8 ff     bl      #-16
41
42// Expect PLT entries as symbols can be preempted
43// .text is Thumb and .plt is ARM, llvm-objdump can currently only disassemble
44// as ARM or Thumb. Work around by disassembling twice.
45// DSO: Disassembly of section .text:
46// DSO-EMPTY:
47// DSO-NEXT: <func1>:
48// DSO-NEXT:     10214:     70 47   bx      lr
49// DSO: <func2>:
50// DSO-NEXT:     10216:     70 47   bx      lr
51// DSO: <func3>:
52// DSO-NEXT:     10218:     70 47   bx      lr
53// DSO-NEXT:     1021a:     d4 d4   bmi     #-88
54// DSO: <_start>:
55// . + 48 + 4 = 0x10250 = PLT func1
56// DSO-NEXT:     1021c:     00 f0 18 e8     blx     #48
57// . + 60 + 4 = 0x10260 = PLT func2
58// DSO-NEXT:     10220:     00 f0 1e e8     blx     #60
59// . + 72 + 4 = 0x10270 = PLT func3
60// DSO-NEXT:     10224:     00 f0 24 e8     blx     #72
61// DSO: Disassembly of section .plt:
62// DSO-EMPTY:
63// DSO-NEXT: <$a>:
64// DSO-NEXT:     10230:       04 e0 2d e5     str     lr, [sp, #-4]!
65// (0x10234 + 8) + (0 RoR 12) + 8192 + 164 = 0x32e0 = .got.plt[3]
66// DSO-NEXT:     10234:       00 e6 8f e2     add     lr, pc, #0, #12
67// DSO-NEXT:     10238:       20 ea 8e e2     add     lr, lr, #32
68// DSO-NEXT:     1023c:       a4 f0 be e5     ldr     pc, [lr, #164]!
69// DSO: <$d>:
70
71// DSO-NEXT:     10240:       d4 d4 d4 d4     .word   0xd4d4d4d4
72// DSO-NEXT:     10244:       d4 d4 d4 d4     .word   0xd4d4d4d4
73// DSO-NEXT:     10248:       d4 d4 d4 d4     .word   0xd4d4d4d4
74// DSO-NEXT:     1024c:       d4 d4 d4 d4     .word   0xd4d4d4d4
75// DSO: <$a>:
76// (0x10250 + 8) + (0 RoR 12) + 8192 + 140 = 0x32e4
77// DSO-NEXT:     10250:       00 c6 8f e2     add     r12, pc, #0, #12
78// DSO-NEXT:     10254:       20 ca 8c e2     add     r12, r12, #32
79// DSO-NEXT:     10258:       8c f0 bc e5     ldr     pc, [r12, #140]!
80// DSO: <$d>:
81// DSO-NEXT:     1025c:       d4 d4 d4 d4     .word   0xd4d4d4d4
82// DSO: <$a>:
83// (0x10260 + 8) + (0 RoR 12) + 8192 + 128 = 0x32e8
84// DSO-NEXT:     10260:       00 c6 8f e2     add     r12, pc, #0, #12
85// DSO-NEXT:     10264:       20 ca 8c e2     add     r12, r12, #32
86// DSO-NEXT:     10268:       80 f0 bc e5     ldr     pc, [r12, #128]!
87// DSO: <$d>:
88// DSO-NEXT:     1026c:       d4 d4 d4 d4     .word   0xd4d4d4d4
89// DSO: <$a>:
90// (0x10270 + 8) + (0 RoR 12) + 8192 + 116 = 0x32ec
91// DSO-NEXT:     10270:       00 c6 8f e2     add     r12, pc, #0, #12
92// DSO-NEXT:     10274:       20 ca 8c e2     add     r12, r12, #32
93// DSO-NEXT:     10278:       74 f0 bc e5     ldr     pc, [r12, #116]!
94// DSO: <$d>:
95// DSO-NEXT:     1027c:       d4 d4 d4 d4     .word   0xd4d4d4d4
96
97// DSOREL:    Name: .got.plt
98// DSOREL-NEXT:    Type: SHT_PROGBITS
99// DSOREL-NEXT:    Flags [
100// DSOREL-NEXT:      SHF_ALLOC
101// DSOREL-NEXT:      SHF_WRITE
102// DSOREL-NEXT:    ]
103// DSOREL-NEXT:    Address: 0x302D8
104// DSOREL-NEXT:    Offset:
105// DSOREL-NEXT:    Size: 24
106// DSOREL-NEXT:    Link:
107// DSOREL-NEXT:    Info:
108// DSOREL-NEXT:    AddressAlignment: 4
109// DSOREL-NEXT:    EntrySize:
110// DSOREL:  Relocations [
111// DSOREL-NEXT:  Section (5) .rel.plt {
112// DSOREL-NEXT:    0x302E4 R_ARM_JUMP_SLOT func1 0x0
113// DSOREL-NEXT:    0x302E8 R_ARM_JUMP_SLOT func2 0x0
114// DSOREL-NEXT:    0x302EC R_ARM_JUMP_SLOT func3 0x0
115