| // RUN: llvm-mc -filetype=obj -triple=thumbv7a-none-linux-gnueabi %p/Inputs/arm-plt-reloc.s -o %t1 |
| // RUN: llvm-mc -filetype=obj -triple=thumbv7a-none-linux-gnueabi %s -o %t2 |
| // RUN: ld.lld %t1 %t2 -o %t |
| // RUN: llvm-objdump -triple=thumbv7a-none-linux-gnueabi -d %t | FileCheck %s |
| // RUN: ld.lld -shared %t1 %t2 -o %t3 |
| // RUN: llvm-objdump -triple=thumbv7a-none-linux-gnueabi -d %t3 | FileCheck -check-prefix=DSOTHUMB %s |
| // RUN: llvm-objdump -triple=armv7a-none-linux-gnueabi -d %t3 | FileCheck -check-prefix=DSOARM %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: |
| // FIXME, interworking is only supported for BL via BLX at the moment, when |
| // interworking thunks are available for b.w and b<cond>.w this can be altered |
| // to test the different forms of interworking. |
| bl func1 |
| bl func2 |
| bl func3 |
| |
| // Executable, expect no PLT |
| // CHECK: Disassembly of section .text: |
| // CHECK-NEXT: func1: |
| // CHECK-NEXT: 11000: 70 47 bx lr |
| // CHECK: func2: |
| // CHECK-NEXT: 11002: 70 47 bx lr |
| // CHECK: func3: |
| // CHECK-NEXT: 11004: 70 47 bx lr |
| // CHECK-NEXT: 11006: d4 d4 |
| // CHECK: _start: |
| // 11008 + 4 -12 = 0x11000 = func1 |
| // CHECK-NEXT: 11008: ff f7 fa ff bl #-12 |
| // 1100c + 4 -14 = 0x11002 = func2 |
| // CHECK-NEXT: 1100c: ff f7 f9 ff bl #-14 |
| // 11010 + 4 -16 = 0x11004 = func3 |
| // CHECK-NEXT: 11010: ff f7 f8 ff bl #-16 |
| |
| // Expect PLT entries as symbols can be preempted |
| // .text is Thumb and .plt is ARM, llvm-objdump can currently only disassemble |
| // as ARM or Thumb. Work around by disassembling twice. |
| // DSOTHUMB: Disassembly of section .text: |
| // DSOTHUMB: func1: |
| // DSOTHUMB-NEXT: 1000: 70 47 bx lr |
| // DSOTHUMB: func2: |
| // DSOTHUMB-NEXT: 1002: 70 47 bx lr |
| // DSOTHUMB: func3: |
| // DSOTHUMB-NEXT: 1004: 70 47 bx lr |
| // DSOTHUMB-NEXT: 1006: d4 d4 |
| // DSOTHUMB: _start: |
| // 0x1008 + 0x28 + 4 = 0x1034 = PLT func1 |
| // DSOTHUMB-NEXT: 1008: 00 f0 14 e8 blx #40 |
| // 0x100c + 0x34 + 4 = 0x1044 = PLT func2 |
| // DSOTHUMB-NEXT: 100c: 00 f0 1a e8 blx #52 |
| // 0x1010 + 0x40 + 4 = 0x1054 = PLT func3 |
| // DSOTHUMB-NEXT: 1010: 00 f0 20 e8 blx #64 |
| // DSOARM: Disassembly of section .plt: |
| // DSOARM-NEXT: $a: |
| // DSOARM-NEXT: 1020: 04 e0 2d e5 str lr, [sp, #-4]! |
| // DSOARM-NEXT: 1024: 04 e0 9f e5 ldr lr, [pc, #4] |
| // DSOARM-NEXT: 1028: 0e e0 8f e0 add lr, pc, lr |
| // DSOARM-NEXT: 102c: 08 f0 be e5 ldr pc, [lr, #8]! |
| // DSOARM: $d: |
| // DSOARM-NEXT: 1030: d0 0f 00 00 .word 0x00000fd0 |
| // 0x1028 + 8 + 0fd0 = 0x2000 |
| // DSOARM: $a: |
| // DSOARM-NEXT: 1034: 04 c0 9f e5 ldr r12, [pc, #4] |
| // DSOARM-NEXT: 1038: 0f c0 8c e0 add r12, r12, pc |
| // DSOARM-NEXT: 103c: 00 f0 9c e5 ldr pc, [r12] |
| // DSOARM: $d: |
| // DSOARM-NEXT: 1040: cc 0f 00 00 .word 0x00000fcc |
| // 0x1038 + 8 + 0fcc = 0x200c |
| // DSOARM: $a: |
| // DSOARM-NEXT: 1044: 04 c0 9f e5 ldr r12, [pc, #4] |
| // DSOARM-NEXT: 1048: 0f c0 8c e0 add r12, r12, pc |
| // DSOARM-NEXT: 104c: 00 f0 9c e5 ldr pc, [r12] |
| // DSOARM: $d: |
| // DSOARM-NEXT: 1050: c0 0f 00 00 .word 0x00000fc0 |
| // 0x1048 + 8 + 0fc0 = 0x2010 |
| // DSOARM: $a: |
| // DSOARM-NEXT: 1054: 04 c0 9f e5 ldr r12, [pc, #4] |
| // DSOARM-NEXT: 1058: 0f c0 8c e0 add r12, r12, pc |
| // DSOARM-NEXT: 105c: 00 f0 9c e5 ldr pc, [r12] |
| // DSOARM: $d: |
| // DSOARM-NEXT: 1060: b4 0f 00 00 .word 0x00000fb4 |
| // 0x1058 + 8 + 0fb4 = 0x2014 |
| |
| // 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 |
