llvm-project/lld/test/ELF/arm-plt-reloc.s

99 lines
3.7 KiB
ArmAsm

// RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %p/Inputs/arm-plt-reloc.s -o %t1
// RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %s -o %t2
// RUN: ld.lld %t1 %t2 -o %t
// RUN: llvm-objdump -triple=armv7a-none-linux-gnueabi -d %t | FileCheck %s
// RUN: ld.lld -shared %t1 %t2 -o %t3
// RUN: llvm-objdump -triple=armv7a-none-linux-gnueabi -d %t3 | FileCheck -check-prefix=DSO %s
// RUN: llvm-readobj -s -r %t3 | FileCheck -check-prefix=DSOREL %s
// REQUIRES: arm
//
// Test PLT entry generation
.syntax unified
.text
.align 2
.globl _start
.type _start,%function
_start:
b func1
bl func2
beq func3
// Executable, expect no PLT
// CHECK: Disassembly of section .text:
// CHECK-NEXT: func1:
// CHECK-NEXT: 11000: 1e ff 2f e1 bx lr
// CHECK: func2:
// CHECK-NEXT: 11004: 1e ff 2f e1 bx lr
// CHECK: func3:
// CHECK-NEXT: 11008: 1e ff 2f e1 bx lr
// CHECK: _start:
// CHECK-NEXT: 1100c: fb ff ff ea b #-20 <func1>
// CHECK-NEXT: 11010: fb ff ff eb bl #-20 <func2>
// CHECK-NEXT: 11014: fb ff ff 0a beq #-20 <func3>
// Expect PLT entries as symbols can be preempted
// DSO: Disassembly of section .text:
// DSO-NEXT: func1:
// DSO-NEXT: 1000: 1e ff 2f e1 bx lr
// DSO: func2:
// DSO-NEXT: 1004: 1e ff 2f e1 bx lr
// DSO: func3:
// DSO-NEXT: 1008: 1e ff 2f e1 bx lr
// DSO: _start:
// S(0x1034) - P(0x100c) + A(-8) = 0x20 = 32
// DSO-NEXT: 100c: 08 00 00 ea b #32
// S(0x1044) - P(0x1010) + A(-8) = 0x2c = 44
// DSO-NEXT: 1010: 0b 00 00 eb bl #44
// S(0x1054) - P(0x1014) + A(-8) = 0x38 = 56
// DSO-NEXT: 1014: 0e 00 00 0a beq #56
// DSO: Disassembly of section .plt:
// DSO-NEXT: $a:
// DSO-NEXT: 1020: 04 e0 2d e5 str lr, [sp, #-4]!
// DSO-NEXT: 1024: 04 e0 9f e5 ldr lr, [pc, #4]
// DSO-NEXT: 1028: 0e e0 8f e0 add lr, pc, lr
// DSO-NEXT: 102c: 08 f0 be e5 ldr pc, [lr, #8]!
// 0x1028 + 8 + 0fd0 = 0x2000
// DSO: $d:
// DSO-NEXT: 1030: d0 0f 00 00 .word 0x00000fd0
// DSO: $a:
// DSO-NEXT: 1034: 04 c0 9f e5 ldr r12, [pc, #4]
// DSO-NEXT: 1038: 0f c0 8c e0 add r12, r12, pc
// DSO-NEXT: 103c: 00 f0 9c e5 ldr pc, [r12]
// 0x1038 + 8 + 0fcc = 0x200c
// DSO: $d:
// DSO-NEXT: 1040: cc 0f 00 00 .word 0x00000fcc
// DSO: $a:
// DSO-NEXT: 1044: 04 c0 9f e5 ldr r12, [pc, #4]
// DSO-NEXT: 1048: 0f c0 8c e0 add r12, r12, pc
// DSO-NEXT: 104c: 00 f0 9c e5 ldr pc, [r12]
// 0x1048 + 8 + 0fc0 = 0x2010
// DSO: $d:
// DSO-NEXT: 1050: c0 0f 00 00 .word 0x00000fc0
// DSO: $a:
// DSO-NEXT: 1054: 04 c0 9f e5 ldr r12, [pc, #4]
// DSO-NEXT: 1058: 0f c0 8c e0 add r12, r12, pc
// DSO-NEXT: 105c: 00 f0 9c e5 ldr pc, [r12]
// 0x1058 + 8 + 0fb4 = 0x2014
// DSO: $d:
// DSO-NEXT: 1060: b4 0f 00 00 .word 0x00000fb4
// DSOREL: Name: .got.plt
// DSOREL-NEXT: Type: SHT_PROGBITS
// DSOREL-NEXT: Flags [
// DSOREL-NEXT: SHF_ALLOC
// DSOREL-NEXT: SHF_WRITE
// DSOREL-NEXT: ]
// DSOREL-NEXT: Address: 0x2000
// DSOREL-NEXT: Offset:
// DSOREL-NEXT: Size: 24
// DSOREL-NEXT: Link:
// DSOREL-NEXT: Info:
// DSOREL-NEXT: AddressAlignment: 4
// DSOREL-NEXT: EntrySize:
// DSOREL: Relocations [
// DSOREL-NEXT: Section (4) .rel.plt {
// DSOREL-NEXT: 0x200C R_ARM_JUMP_SLOT func1 0x0
// DSOREL-NEXT: 0x2010 R_ARM_JUMP_SLOT func2 0x0
// DSOREL-NEXT: 0x2014 R_ARM_JUMP_SLOT func3 0x0