| // REQUIRES: arm |
| // 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 --hash-style=sysv -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 |
| // |
| // 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-NEXT: 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 bmi #-88 |
| // DSOTHUMB: _start: |
| // 0x1008 + 0x34 + 4 = 0x1040 = PLT func1 |
| // DSOTHUMB-NEXT: 1008: 00 f0 1a e8 blx #52 |
| // 0x100c + 0x40 + 4 = 0x1050 = PLT func2 |
| // DSOTHUMB-NEXT: 100c: 00 f0 20 e8 blx #64 |
| // 0x1010 + 0x4C + 4 = 0x1060 = PLT func3 |
| // DSOTHUMB-NEXT: 1010: 00 f0 26 e8 blx #76 |
| // DSOARM: Disassembly of section .plt: |
| // DSOARM-NEXT: $a: |
| // DSOARM-NEXT: 1020: 04 e0 2d e5 str lr, [sp, #-4]! |
| // (0x1024 + 8) + (0 RoR 12) + (0 RoR 20) + (0xfdc) = 0x2008 = .got.plt[3] |
| // DSOARM-NEXT: 1024: 00 e6 8f e2 add lr, pc, #0, #12 |
| // DSOARM-NEXT: 1028: 00 ea 8e e2 add lr, lr, #0, #20 |
| // DSOARM-NEXT: 102c: dc ff be e5 ldr pc, [lr, #4060]! |
| // DSOARM: $d: |
| |
| // DSOARM-NEXT: 1030: d4 d4 d4 d4 .word 0xd4d4d4d4 |
| // DSOARM-NEXT: 1034: d4 d4 d4 d4 .word 0xd4d4d4d4 |
| // DSOARM-NEXT: 1038: d4 d4 d4 d4 .word 0xd4d4d4d4 |
| // DSOARM-NEXT: 103c: d4 d4 d4 d4 .word 0xd4d4d4d4 |
| // DSOARM: $a: |
| // (0x1040 + 8) + (0 RoR 12) + (0 RoR 20) + (0xfc4) = 0x200c |
| // DSOARM-NEXT: 1040: 00 c6 8f e2 add r12, pc, #0, #12 |
| // DSOARM-NEXT: 1044: 00 ca 8c e2 add r12, r12, #0, #20 |
| // DSOARM-NEXT: 1048: c4 ff bc e5 ldr pc, [r12, #4036]! |
| // DSOARM: $d: |
| // DSOARM-NEXT: 104c: d4 d4 d4 d4 .word 0xd4d4d4d4 |
| // DSOARM: $a: |
| // (0x1050 + 8) + (0 RoR 12) + (0 RoR 20) + (0xfb8) = 0x2010 |
| // DSOARM-NEXT: 1050: 00 c6 8f e2 add r12, pc, #0, #12 |
| // DSOARM-NEXT: 1054: 00 ca 8c e2 add r12, r12, #0, #20 |
| // DSOARM-NEXT: 1058: b8 ff bc e5 ldr pc, [r12, #4024]! |
| // DSOARM: $d: |
| // DSOARM-NEXT: 105c: d4 d4 d4 d4 .word 0xd4d4d4d4 |
| // DSOARM: $a: |
| // (0x1060 + 8) + (0 RoR 12) + (0 RoR 20) + (0xfac) = 0x2014 |
| // DSOARM-NEXT: 1060: 00 c6 8f e2 add r12, pc, #0, #12 |
| // DSOARM-NEXT: 1064: 00 ca 8c e2 add r12, r12, #0, #20 |
| // DSOARM-NEXT: 1068: ac ff bc e5 ldr pc, [r12, #4012]! |
| // DSOARM: $d: |
| // DSOARM-NEXT: 106c: d4 d4 d4 d4 .word 0xd4d4d4d4 |
| |
| // 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 |
