llvm-project/lld/test/ELF/arm-branch-undef-weak-plt-t...

37 lines
1.7 KiB
ArmAsm

// REQUIRES: arm
// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv7a-none-linux-gnueabi %S/Inputs/arm-shared.s -o %t
// RUN: ld.lld %t --shared -o %t.so
// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv7a-none-linux-gnueabi %s -o %t2
// RUN: ld.lld %t2 %t.so -o %t3
// RUN: llvm-objdump -d -triple=armv7a-none-linux-gnueabi -start-address=69632 -stop-address=69664 %t3 | FileCheck %s
// When we are dynamic linking, undefined weak references have a PLT entry so
// we must create a thunk for the branch to the PLT entry.
.text
.globl bar2
.weak undefined_weak_we_expect_a_plt_entry_for
_start:
.globl _start
.type _start, %function
b undefined_weak_we_expect_a_plt_entry_for
bl bar2
// Create 32 Mb gap between the call to the weak reference and the PLT so that
// the b and bl need a range-extension thunk.
.section .text.1, "ax", %progbits
.space 32 * 1024 * 1024
// CHECK: Disassembly of section .text:
// CHECK-EMPTY:
// CHECK-NEXT: _start:
// CHECK-NEXT: 11000: 00 00 00 ea b #0 <__ARMv7ABSLongThunk_undefined_weak_we_expect_a_plt_entry_for>
// CHECK-NEXT: 11004: 02 00 00 eb bl #8 <__ARMv7ABSLongThunk_bar2>
// CHECK: __ARMv7ABSLongThunk_undefined_weak_we_expect_a_plt_entry_for:
// CHECK-NEXT: 11008: 40 c0 01 e3 movw r12, #4160
// CHECK-NEXT: 1100c: 01 c2 40 e3 movt r12, #513
// CHECK-NEXT: 11010: 1c ff 2f e1 bx r12
// CHECK: __ARMv7ABSLongThunk_bar2:
// CHECK-NEXT: 11014: 50 c0 01 e3 movw r12, #4176
// CHECK-NEXT: 11018: 01 c2 40 e3 movt r12, #513
// CHECK-NEXT: 1101c: 1c ff 2f e1 bx r12