| // 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=0x12000 -stop-address=0x12008 %t2 | FileCheck -check-prefix=CHECK-ARM1 %s |
| // RUN: llvm-objdump -d -triple=thumbv6-none-linux-gnueabi %t2 -start-address=0x12008 -stop-address=0x1200c | FileCheck -check-prefix=CHECK-THUMB1 %s |
| // RUN: llvm-objdump -d -triple=armv6-none-linux-gnueabi -start-address=0x21200c -stop-address=0x212014 %t2 | FileCheck -check-prefix=CHECK-ARM2 %s |
| // RUN: llvm-objdump -d -triple=thumbv6-none-linux-gnueabi %t2 -start-address=0x613000 -stop-address=0x613002 | 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. |
| .text |
| .syntax unified |
| .cpu arm1176jzf-s |
| .globl _start |
| .type _start,%function |
| .balign 0x1000 |
| _start: |
| bl thumbfunc |
| bx lr |
| |
| // CHECK-ARM1: Disassembly of section .text: |
| // CHECK-ARM1-EMPTY: |
| // CHECK-ARM1-NEXT: _start: |
| // CHECK-ARM1-NEXT: 12000: 00 00 00 fa blx #0 <thumbfunc> |
| // CHECK-ARM1-NEXT: 12004: 1e ff 2f e1 bx lr |
| .thumb |
| .section .text.2, "ax", %progbits |
| .globl thumbfunc |
| .type thumbfunc,%function |
| thumbfunc: |
| bl farthumbfunc |
| |
| // CHECK-THUMB1: thumbfunc: |
| // CHECK-THUMB1-NEXT: 12008: 00 f2 00 e8 blx #2097152 |
| // 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: 21200c: 04 f0 1f e5 ldr pc, [pc, #-4] |
| // CHECK-ARM2: $d: |
| // CHECK-ARM2-NEXT: 212010: 01 30 61 00 .word 0x00613001 |
| .section .text.4, "ax", %progbits |
| .space 0x200000 |
| |
| .section .text.5, "ax", %progbits |
| .space 0x200000 |
| |
| .thumb |
| .section .text.6, "ax", %progbits |
| .balign 0x1000 |
| .globl farthumbfunc |
| .type farthumbfunc,%function |
| farthumbfunc: |
| bx lr |
| // CHECK-THUMB2: farthumbfunc: |
| // CHECK-THUMB2-NEXT: 613000: 70 47 bx lr |
