blob: 3d0c052fbc96b665fa2ac1c06814b3af792d8400 [file] [log] [blame]
// REQUIRES: arm
// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv6-none-linux-gnueabi %s -o %t
// RUN: ld.lld %t -o %t2
// RUN: llvm-objdump -d --triple=armv6-none-linux-gnueabi --start-address=0x21000 --stop-address=0x21008 %t2 | FileCheck --check-prefix=CHECK-ARM1 %s
// RUN: llvm-objdump -d --triple=thumbv6-none-linux-gnueabi %t2 --start-address=0x21008 --stop-address=0x2100c | FileCheck --check-prefix=CHECK-THUMB1 %s
// RUN: llvm-objdump -d --triple=armv6-none-linux-gnueabi --start-address=0x22100c --stop-address=0x221014 %t2 | FileCheck --check-prefix=CHECK-ARM2 %s
// RUN: llvm-objdump -d --triple=thumbv6-none-linux-gnueabi %t2 --start-address=0x622000 --stop-address=0x622002 | FileCheck --check-prefix=CHECK-THUMB2 %s
/// On Arm v6 the range of a Thumb BL instruction is only 4 megabytes as the
/// extended range encoding is not supported. The following example has a Thumb
/// BL that is out of range on ARM v6 and requires a range extension thunk.
/// As v6 does not support MOVT or MOVW instructions the Thunk must not
/// use these instructions either.
/// ARM v6 supports blx so we shouldn't see the blx not supported warning.
// CHECK-NOT: warning: lld uses blx instruction, no object with architecture supporting feature detected.
.syntax unified
.cpu arm1176jzf-s
.globl _start
.type _start,%function
.balign 0x1000
bl thumbfunc
bx lr
// CHECK-ARM1: Disassembly of section .text:
// CHECK-ARM1-NEXT: <_start>:
// CHECK-ARM1-NEXT: 21000: 00 00 00 fa blx 0x21008 <thumbfunc>
// CHECK-ARM1-NEXT: 21004: 1e ff 2f e1 bx lr
.section .text.2, "ax", %progbits
.globl thumbfunc
.type thumbfunc,%function
bl farthumbfunc
// CHECK-THUMB1: <thumbfunc>:
// CHECK-THUMB1-NEXT: 21008: 00 f2 00 e8 blx 0x22100c <__ARMv5ABSLongThunk_farthumbfunc>
/// 6 Megabytes, enough to make farthumbfunc out of range of caller
/// on a v6 Arm, but not on a v7 Arm.
.section .text.3, "ax", %progbits
.space 0x200000
// CHECK-ARM2: <__ARMv5ABSLongThunk_farthumbfunc>:
// CHECK-ARM2-NEXT: 22100c: 04 f0 1f e5 ldr pc, [pc, #-4]
// CHECK-ARM2: <$d>:
// CHECK-ARM2-NEXT: 221010: 01 20 62 00 .word 0x00622001
.section .text.4, "ax", %progbits
.space 0x200000
.section .text.5, "ax", %progbits
.space 0x200000
.section .text.6, "ax", %progbits
.balign 0x1000
.globl farthumbfunc
.type farthumbfunc,%function
bx lr
// CHECK-THUMB2: <farthumbfunc>:
// CHECK-THUMB2-NEXT: 622000: 70 47 bx lr