forked from OSchip/llvm-project
66 lines
2.5 KiB
ArmAsm
66 lines
2.5 KiB
ArmAsm
// REQUIRES: arm
|
|
// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv6m-none-eabi %s -o %t
|
|
// RUN: echo "SECTIONS { \
|
|
// RUN: . = SIZEOF_HEADERS; \
|
|
// RUN: .text_low : { *(.text_low) *(.text_low2) } \
|
|
// RUN: .text_high 0x2000000 : { *(.text_high) *(.text_high2) } \
|
|
// RUN: } " > %t.script
|
|
// RUN: ld.lld --no-rosegment --script %t.script %t -o %t2
|
|
// RUN: llvm-objdump -d %t2 --triple=armv6m-none-eabi | FileCheck %s
|
|
// RUN: ld.lld --no-rosegment --script %t.script %t -o %t3 --pie
|
|
// RUN: llvm-objdump -d %t3 --triple=armv6m-none-eabi | FileCheck --check-prefix=CHECK-PI %s
|
|
|
|
// Range extension thunks for Arm Architecture v6m. Only Thumb instructions
|
|
// are permitted which limits the access to instructions that can access the
|
|
// high registers (r8 - r15), this means that the thunks have to spill
|
|
// low registers (r0 - r7) in order to perform the transfer of control.
|
|
|
|
.syntax unified
|
|
.section .text_low, "ax", %progbits
|
|
.thumb
|
|
.type _start, %function
|
|
.balign 4
|
|
.globl _start
|
|
_start:
|
|
bl far
|
|
|
|
.section .text_high, "ax", %progbits
|
|
.globl far
|
|
.type far, %function
|
|
far:
|
|
bx lr
|
|
|
|
// CHECK: Disassembly of section .text_low:
|
|
// CHECK-EMPTY:
|
|
// CHECK-NEXT: <_start>:
|
|
// CHECK-NEXT: 94: 00 f0 00 f8 bl #0
|
|
// CHECK: <__Thumbv6MABSLongThunk_far>:
|
|
// CHECK-NEXT: 98: 03 b4 push {r0, r1}
|
|
// CHECK-NEXT: 9a: 01 48 ldr r0, [pc, #4]
|
|
// CHECK-NEXT: 9c: 01 90 str r0, [sp, #4]
|
|
// CHECK-NEXT: 9e: 01 bd pop {r0, pc}
|
|
// CHECK: a0: 01 00 00 02 .word 0x02000001
|
|
// CHECK: Disassembly of section .text_high:
|
|
// CHECK-EMPTY:
|
|
// CHECK-NEXT: <far>:
|
|
// CHECK-NEXT: 2000000: 70 47 bx lr
|
|
|
|
// CHECK-PI: Disassembly of section .text_low:
|
|
// CHECK-PI-EMPTY:
|
|
// CHECK-PI-NEXT: <_start>:
|
|
// CHECK-PI-NEXT: 130: 00 f0 00 f8 bl #0
|
|
// CHECK-PI: <__Thumbv6MPILongThunk_far>:
|
|
// CHECK-PI-NEXT: 134: 01 b4 push {r0}
|
|
// CHECK-PI-NEXT: 136: 02 48 ldr r0, [pc, #8]
|
|
// CHECK-PI-NEXT: 138: 84 46 mov r12, r0
|
|
// CHECK-PI-NEXT: 13a: 01 bc pop {r0}
|
|
// pc = pc (0x13c + 4) + r12 (1fffec1) = 0x2000001 = .far
|
|
// CHECK-PI-NEXT: 13c: e7 44 add pc, r12
|
|
// CHECK-PI-NEXT: 13e: c0 46 mov r8, r8
|
|
// CHECK-PI: 140: c1 fe ff 01 .word 0x01fffec1
|
|
|
|
// CHECK-PI: Disassembly of section .text_high:
|
|
// CHECK-PI-EMPTY:
|
|
// CHECK-PI-NEXT: <far>:
|
|
// CHECK-PI-NEXT: 2000000: 70 47 bx lr
|