| // REQUIRES: arm |
| // RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv5-none-linux-gnueabi %s -o %t |
| // RUN: ld.lld %t -o %t2 --shared |
| // RUN: llvm-objdump --no-show-raw-insn --start-address=7340044 --stop-address=7340048 --triple=armv5-none-linux-gnueabi -d %t2 | FileCheck %s |
| // RUN: llvm-objdump --no-show-raw-insn --start-address=8388620 --stop-address=8388624 --triple=thumbv5-none-linux-gnueabi -d %t2 | FileCheck %s --check-prefix=CHECK-CALL |
| // RUN: llvm-objdump --no-show-raw-insn --start-address=13631520 --stop-address=13631584 --triple=armv5-none-linux-gnueabi -d %t2 | FileCheck %s --check-prefix=CHECK-PLT |
| /// When we create a thunk to a PLT entry the relocation is redirected to the |
| /// Thunk, changing its expression to a non-PLT equivalent. If the thunk |
| /// becomes unusable we need to restore the relocation expression to the PLT |
| /// form so that when we create a new thunk it targets the PLT. |
| |
| /// Test case that checks the case: |
| /// - Thunk is created on pass 1 to a PLT entry for preemptible |
| /// - Some other Thunk added in the same pass moves the thunk to |
| /// preemptible out of range of its caller. |
| /// - New Thunk is created on pass 2 to PLT entry for preemptible |
| |
| .globl preemptible |
| .globl preemptible2 |
| .section .text.01, "ax", %progbits |
| .balign 0x100000 |
| .thumb |
| .globl needsplt |
| .type needsplt, %function |
| needsplt: |
| bl preemptible |
| .section .text.02, "ax", %progbits |
| .space (1024 * 1024) |
| |
| .section .text.03, "ax", %progbits |
| .space (1024 * 1024) |
| |
| .section .text.04, "ax", %progbits |
| .space (1024 * 1024) |
| |
| .section .text.05, "ax", %progbits |
| .space (1024 * 1024) |
| |
| .section .text.06, "ax", %progbits |
| .space (1024 * 1024) |
| |
| .section .text.07, "ax", %progbits |
| .space (1024 * 1024) |
| /// 0x70000c + 8 + 0x60002c = 0xd00040 = preemptible@plt |
| // CHECK: 0070000c <__ARMV5PILongThunk_preemptible>: |
| // CHECK-NEXT: 70000c: b #6291500 |
| |
| .section .text.08, "ax", %progbits |
| .space (1024 * 1024) - 4 |
| |
| .section .text.10, "ax", %progbits |
| .balign 2 |
| bl preemptible |
| bl preemptible2 |
| /// 0x80000c + 4 - 100004 = 0x70000c = __ARMv5PILongThunk_preemptible |
| // CHECK-CALL: 80000c: blx #-1048580 |
| .balign 2 |
| .globl preemptible |
| .type preemptible, %function |
| preemptible: |
| bx lr |
| .globl preemptible2 |
| .type preemptible2, %function |
| preemptible2: |
| bx lr |
| |
| |
| .section .text.11, "ax", %progbits |
| .space (5 * 1024 * 1024) |
| |
| |
| // CHECK-PLT: Disassembly of section .plt: |
| // CHECK-PLT-EMPTY: |
| // CHECK-PLT-NEXT: 00d00020 <$a>: |
| // CHECK-PLT-NEXT: d00020: str lr, [sp, #-4]! |
| // CHECK-PLT-NEXT: add lr, pc, #0, #12 |
| // CHECK-PLT-NEXT: add lr, lr, #32, #20 |
| // CHECK-PLT-NEXT: ldr pc, [lr, #148]! |
| // CHECK-PLT: 00d00030 <$d>: |
| // CHECK-PLT-NEXT: d00030: d4 d4 d4 d4 .word 0xd4d4d4d4 |
| // CHECK-PLT-NEXT: d00034: d4 d4 d4 d4 .word 0xd4d4d4d4 |
| // CHECK-PLT-NEXT: d00038: d4 d4 d4 d4 .word 0xd4d4d4d4 |
| // CHECK-PLT-NEXT: d0003c: d4 d4 d4 d4 .word 0xd4d4d4d4 |
| // CHECK-PLT: 00d00040 <$a>: |
| // CHECK-PLT-NEXT: d00040: add r12, pc, #0, #12 |
| // CHECK-PLT-NEXT: d00044: add r12, r12, #32, #20 |
| // CHECK-PLT-NEXT: d00048: ldr pc, [r12, #124]! |
| // CHECK-PLT: 00d0004c <$d>: |
| // CHECK-PLT-NEXT: d0004c: d4 d4 d4 d4 .word 0xd4d4d4d4 |
| // CHECK-PLT: 00d00050 <$a>: |
| // CHECK-PLT-NEXT: d00050: add r12, pc, #0, #12 |
| // CHECK-PLT-NEXT: d00054: add r12, r12, #32, #20 |
| // CHECK-PLT-NEXT: d00058: ldr pc, [r12, #112]! |
| // CHECK-PLT: 00d0005c <$d>: |
| // CHECK-PLT-NEXT: d0005c: d4 d4 d4 d4 .word 0xd4d4d4d4 |
