forked from OSchip/llvm-project
65 lines
2.4 KiB
ArmAsm
65 lines
2.4 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv6-none-linux-gnueabi %s -o %t
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// RUN: ld.lld %t -o %t2 2>&1
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// RUN: llvm-objdump -d -triple=armv6-none-linux-gnueabi -start-address=69632 -stop-address=69640 %t2 | FileCheck -check-prefix=CHECK-ARM1 %s
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// RUN: llvm-objdump -d -triple=thumbv6-none-linux-gnueabi %t2 -start-address=69640 -stop-address=69644 | FileCheck -check-prefix=CHECK-THUMB1 %s
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// RUN: llvm-objdump -d -triple=armv6-none-linux-gnueabi -start-address=2166796 -stop-address=2166804 %t2 | FileCheck -check-prefix=CHECK-ARM2 %s
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// RUN: llvm-objdump -d -triple=thumbv6-none-linux-gnueabi %t2 -start-address=6365184 -stop-address=6365186 | FileCheck -check-prefix=CHECK-THUMB2 %s
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// On Arm v6 the range of a Thumb BL instruction is only 4 megabytes as the
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// extended range encoding is not supported. The following example has a Thumb
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// BL that is out of range on ARM v6 and requires a range extension thunk.
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// As v6 does not support MOVT or MOVW instructions the Thunk must not
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// use these instructions either.
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// ARM v6 supports blx so we shouldn't see the blx not supported warning.
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// CHECK-NOT: warning: lld uses blx instruction, no object with architecture supporting feature detected.
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.text
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.syntax unified
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.cpu arm1176jzf-s
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.globl _start
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.type _start,%function
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.balign 0x1000
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_start:
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bl thumbfunc
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bx lr
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// CHECK-ARM1: Disassembly of section .text:
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// CHECK-ARM1-NEXT: _start:
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// CHECK-ARM1-NEXT: 11000: 00 00 00 fa blx #0 <thumbfunc>
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// CHECK-ARM1-NEXT: 11004: 1e ff 2f e1 bx lr
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.thumb
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.section .text.2, "ax", %progbits
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.globl thumbfunc
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.type thumbfunc,%function
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thumbfunc:
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bl farthumbfunc
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// CHECK-THUMB1: thumbfunc:
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// CHECK-THUMB1-NEXT: 11008: 00 f2 00 e8 blx #2097152
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// 6 Megabytes, enough to make farthumbfunc out of range of caller
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// on a v6 Arm, but not on a v7 Arm.
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.section .text.3, "ax", %progbits
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.space 0x200000
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// CHECK-ARM2: __ARMv5ABSLongThunk_farthumbfunc:
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// CHECK-ARM2-NEXT: 21100c: 04 f0 1f e5 ldr pc, [pc, #-4]
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// CHECK-ARM2: $d:
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// CHECK-ARM2-NEXT: 211010: 01 20 61 00 .word 0x00612001
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.section .text.4, "ax", %progbits
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.space 0x200000
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.section .text.5, "ax", %progbits
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.space 0x200000
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.thumb
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.section .text.6, "ax", %progbits
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.balign 0x1000
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.globl farthumbfunc
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.type farthumbfunc,%function
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farthumbfunc:
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bx lr
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// CHECK-THUMB2: farthumbfunc:
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// CHECK-THUMB2-NEXT: 612000: 70 47 bx lr
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