derek.holloway
7502bf64a4
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76 lines
2.2 KiB
ArmAsm
76 lines
2.2 KiB
ArmAsm
// REQUIRES: aarch64
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// RUN: rm -rf %t && split-file %s %t && cd %t
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// RUN: llvm-mc -filetype=obj -triple=aarch64 asm -o a.o
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// RUN: ld.lld --script=lds a.o -o exe --defsym absolute=0xf0000000
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// RUN: llvm-objdump -d --no-show-raw-insn exe | FileCheck %s
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//--- asm
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.section ".note.gnu.property", "a"
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.p2align 3
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.long 4
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.long 0x10
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.long 0x5
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.asciz "GNU"
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/// Enable BTI.
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.long 0xc0000000 // GNU_PROPERTY_AARCH64_FEATURE_1_AND.
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.long 4
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.long 1 // GNU_PROPERTY_AARCH64_FEATURE_1_BTI.
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.long 0
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.section .text.0,"axy",@progbits
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.global _start
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.type _start,@function
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_start:
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/// Expect thunk to target a linker generated entry point with BTI landing pad.
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/// Two calls to make sure only one landing pad is created.
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bl fn1
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b fn1
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/// No BTI landing pad is added for absolute symbols.
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bl absolute
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/// This function does not have a BTI compatible landing pad. Expect a linker
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/// generated landing pad for indirect branch thunks.
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.section .text.1,"axy",@progbits
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.hidden fn1
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.type fn1,@function
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fn1:
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ret
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// CHECK-LABEL: <_start>:
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// CHECK-NEXT: 18001000: bl 0x1800100c <__AArch64AbsXOLongThunk_>
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// CHECK-NEXT: b 0x1800100c <__AArch64AbsXOLongThunk_>
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// CHECK-NEXT: bl 0x18001020 <__AArch64AbsXOLongThunk_absolute>
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// CHECK-LABEL: <__AArch64AbsXOLongThunk_>:
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// CHECK-NEXT: 1800100c: mov x16, #0x0
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// CHECK-NEXT: movk x16, #0x3000, lsl #16
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// CHECK-NEXT: movk x16, #0x0, lsl #32
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// CHECK-NEXT: movk x16, #0x0, lsl #48
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// CHECK-NEXT: br x16
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// CHECK-LABEL: <__AArch64AbsXOLongThunk_absolute>:
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// CHECK-NEXT: 18001020: mov x16, #0x0
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// CHECK-NEXT: movk x16, #0xf000, lsl #16
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// CHECK-NEXT: movk x16, #0x0, lsl #32
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// CHECK-NEXT: movk x16, #0x0, lsl #48
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// CHECK-NEXT: br x16
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// CHECK-LABEL: <__AArch64BTIThunk_>:
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// CHECK-NEXT: 30000000: bti c
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// CHECK-LABEL: <fn1>:
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// CHECK-NEXT: 30000004: ret
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//--- lds
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PHDRS {
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low PT_LOAD FLAGS(0x1 | 0x4);
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mid PT_LOAD FLAGS(0x1 | 0x4);
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high PT_LOAD FLAGS(0x1 | 0x4);
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}
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SECTIONS {
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.rodata 0x10000000 : { *(.note.gnu.property) } :low
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.text 0x18001000 : { *(.text.0) } :mid
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.text_high 0x30000000 : { *(.text.*) } :high
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}
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