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| // 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 --start-address=7340044 --stop-address=7340048 --triple=armv5-none-linux-gnueabi -d %t2 | FileCheck %s
// RUN: llvm-objdump --start-address=8388620 --stop-address=8388624 --triple=thumbv5-none-linux-gnueabi -d %t2 | FileCheck %s -check-prefix=CHECK-CALL
// RUN: llvm-objdump --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: 0b 00 18 ea 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: ff f6 fe ef 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: 04 e0 2d e5 str lr, [sp, #-4]!
// CHECK-PLT-NEXT: d00024: 00 e6 8f e2 add lr, pc, #0, #12
// CHECK-PLT-NEXT: d00028: 02 ea 8e e2 add lr, lr, #8192
// CHECK-PLT-NEXT: d0002c: 94 f0 be e5 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: 00 c6 8f e2 add r12, pc, #0, #12
// CHECK-PLT-NEXT: d00044: 02 ca 8c e2 add r12, r12, #8192
// CHECK-PLT-NEXT: d00048: 7c f0 bc e5 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: 00 c6 8f e2 add r12, pc, #0, #12
// CHECK-PLT-NEXT: d00054: 02 ca 8c e2 add r12, r12, #8192
// CHECK-PLT-NEXT: d00058: 70 f0 bc e5 ldr pc, [r12, #112]!
// CHECK-PLT: 00d0005c $d:
// CHECK-PLT-NEXT: d0005c: d4 d4 d4 d4 .word 0xd4d4d4d4
|