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| // 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
|