aarch64-thunk-script.s
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// REQUIRES: aarch64
// RUN: split-file %s %t
// RUN: llvm-mc -filetype=obj -triple=aarch64 %t/asm -o %t.o
// RUN: ld.lld --script %t/lds %t.o -o %t/out
// RUN: llvm-objdump -d --no-show-raw-insn --print-imm-hex %t/out | FileCheck %s
// RUN: llvm-nm --no-sort --special-syms %t/out | FileCheck --check-prefix=NM %s
//--- asm
// Check that we have the out of branch range calculation right. The immediate
// field is signed so we have a slightly higher negative displacement.
.section .text_low, "ax", %progbits
.globl _start
.type _start, %function
_start:
// Need thunk to high_target@plt
bl high_target
// Need thunk to .text_high+4
bl .text_high+4
ret
.section .text_high, "ax", %progbits
.globl high_target
.type high_target, %function
high_target:
// No Thunk needed as we are within signed immediate range
bl _start
ret
// CHECK: Disassembly of section .text_low:
// CHECK-EMPTY:
// CHECK-NEXT: <_start>:
// CHECK-NEXT: 2000: bl 0x200c <__AArch64AbsLongThunk_high_target>
// CHECK-NEXT: 2004: bl 0x201c <__AArch64AbsLongThunk_>
// CHECK-NEXT: ret
// CHECK: <__AArch64AbsLongThunk_high_target>:
// CHECK-NEXT: 200c: ldr x16, 0x2014
// CHECK-NEXT: br x16
// CHECK: <$d>:
// CHECK-NEXT: 2014: 00 20 00 08 .word 0x08002000
// CHECK-NEXT: 2018: 00 00 00 00 .word 0x00000000
// CHECK: <__AArch64AbsLongThunk_>:
// CHECK-NEXT: 201c: ldr x16, 0x2024
// CHECK-NEXT: 2020: br x16
// CHECK: <$d>:
// CHECK-NEXT: 2024: 04 20 00 08 .word 0x08002004
// CHECK-NEXT: 2028: 00 00 00 00 .word 0x00000000
// CHECK: Disassembly of section .text_high:
// CHECK-EMPTY:
// CHECK-NEXT: <high_target>:
// CHECK-NEXT: 8002000: bl 0x2000 <_start>
// CHECK-NEXT: ret
/// Local symbols copied from %t.o
// NM: t $x.0
// NM-NEXT: t $x.1
/// Local thunk symbols.
// NM-NEXT: t __AArch64AbsLongThunk_high_target
// NM-NEXT: t $x
// NM-NEXT: t $d
// NM-NEXT: t __AArch64AbsLongThunk_{{$}}
// NM-NEXT: t $x
// NM-NEXT: t $d
/// Global symbols.
// NM-NEXT: T _start
// NM-NEXT: T high_target
//--- lds
PHDRS {
low PT_LOAD FLAGS(0x1 | 0x4);
high PT_LOAD FLAGS(0x1 | 0x4);
}
SECTIONS {
.text_low 0x2000: { *(.text_low) } :low
.text_high 0x8002000 : { *(.text_high) } :high
}