arm-thumb-undefined-weak.s
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// REQUIRES: arm
// RUN: llvm-mc -filetype=obj -triple=thumbv7a-none-linux-gnueabi %s -o %t
// RUN: ld.lld %t -o %t2
// RUN: llvm-objdump -triple=thumbv7a-none-linux-gnueabi -d %t2 | FileCheck %s
// Check that the ARM ABI rules for undefined weak symbols are applied.
// Branch instructions are resolved to the next instruction. Relative
// relocations are resolved to the place.
.syntax unified
.weak target
.text
.global _start
_start:
// R_ARM_THM_JUMP19
beq.w target
// R_ARM_THM_JUMP24
b.w target
// R_ARM_THM_CALL
bl target
// R_ARM_THM_CALL with exchange
blx target
// R_ARM_THM_MOVT_PREL
movt r0, :upper16:target - .
// R_ARM_THM_MOVW_PREL_NC
movw r0, :lower16:target - .
// CHECK: Disassembly of section .text:
// CHECK-EMPTY:
// CHECK: 110b4: {{.*}} beq.w #0 <_start+0x4>
// CHECK-NEXT: 110b8: {{.*}} b.w #0 <_start+0x8>
// CHECK-NEXT: 110bc: {{.*}} bl #0
// blx is transformed into bl so we don't change state
// CHECK-NEXT: 110c0: {{.*}} bl #0
// CHECK-NEXT: 110c4: {{.*}} movt r0, #0
// CHECK-NEXT: 110c8: {{.*}} movw r0, #0