arm-thumb-interwork-thunk-v5.s
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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
// RUN: llvm-objdump -d %t2 --triple=armv5-none-linux-gnueabi | FileCheck %s
// RUN: ld.lld %t -o %t3 --shared
// RUN: llvm-objdump -d %t3 --triple=armv5-none-linux-gnueabi | FileCheck --check-prefix=CHECK-PI %s
// Test ARM Thumb Interworking on older Arm architectures using Thunks that do
// not use MOVT/MOVW instructions.
// For pure interworking (not considering range extension) there is only the
// case of an Arm B to a Thumb Symbol to consider as in older Arm architectures
// there is no Thumb B.w that we can intercept with a Thunk and we still assume
// support for the blx instruction for Thumb BL and BLX to an Arm symbol.
.arm
.text
.syntax unified
.cpu arm10tdmi
.text
.globl _start
.type _start, %function
.balign 0x1000
_start:
b thumb_func
bl thumb_func
blx thumb_func
bx lr
// CHECK: <_start>:
// CHECK-NEXT: 21000: 03 00 00 ea b #12 <__ARMv5ABSLongThunk_thumb_func>
// CHECK-NEXT: 21004: 01 00 00 fa blx #4 <thumb_func>
// CHECK-NEXT: 21008: 00 00 00 fa blx #0 <thumb_func>
// CHECK-NEXT: 2100c: 1e ff 2f e1 bx lr
// CHECK: <thumb_func>:
// CHECK-NEXT: 21010: 70 47 bx lr
// CHECK: <__ARMv5ABSLongThunk_thumb_func>:
// CHECK-NEXT: 21014: 04 f0 1f e5 ldr pc, [pc, #-4]
// CHECK: <$d>:
// CHECK-NEXT: 21018: 11 10 02 00 .word 0x00021011
// CHECK-PI: <_start>:
// CHECK-PI-NEXT: 11000: 03 00 00 ea b #12 <__ARMV5PILongThunk_thumb_func>
// CHECK-PI-NEXT: 11004: 01 00 00 fa blx #4 <thumb_func>
// CHECK-PI-NEXT: 11008: 00 00 00 fa blx #0 <thumb_func>
// CHECK-PI-NEXT: 1100c: 1e ff 2f e1 bx lr
// CHECK-PI: <thumb_func>:
// CHECK-PI-NEXT: 11010: 70 47 bx lr
// CHECK-PI: <__ARMV5PILongThunk_thumb_func>:
// CHECK-PI-NEXT: 11014: 04 c0 9f e5 ldr r12, [pc, #4]
// CHECK-PI-NEXT: 11018: 0c c0 8f e0 add r12, pc, r12
// CHECK-PI-NEXT: 1101c: 1c ff 2f e1 bx r12
// CHECK-PI: <$d>:
// CHECK-PI-NEXT: 11020: f1 ff ff ff .word 0xfffffff1
.section .text.1, "ax", %progbits
.thumb
.hidden thumb_func
.type thumb_func, %function
thumb_func:
bx lr