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2c1bdd4a08
Following from the discussion in #132224, this seems like the best approach to deal with a mix of XO and RX output sections in the same binary. This change will also simplify the implementation of the PURECODE section flag for AArch64. To control this behaviour, the `--[no-]xosegment` flag is added to LLD (similarly to `--[no-]rosegment`), which determines whether to allow merging XO and RX sections in the same segment. The default value is `--no-xosegment`, which is a breaking change compared to the previous behaviour. Release notes are also added, since this will be a breaking change.
56 lines
2.0 KiB
ArmAsm
56 lines
2.0 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 start.s -o start.o
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// RUN: llvm-mc -filetype=obj -triple=aarch64 xo.s -o xo.o
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// RUN: llvm-mc -filetype=obj -triple=aarch64 rx.s -o rx.o
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// RUN: ld.lld start.o xo.o -o xo
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// RUN: ld.lld start.o rx.o -o rx-default
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// RUN: ld.lld --xosegment start.o rx.o -o rx-xosegment
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// RUN: ld.lld --no-xosegment start.o rx.o -o rx-no-xosegment
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// RUN: llvm-readelf -l xo | FileCheck --check-prefix=CHECK-XO %s
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// RUN: llvm-readelf -l rx-default | FileCheck --check-prefix=CHECK-MERGED %s
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// RUN: llvm-readelf -l rx-xosegment | FileCheck --check-prefix=CHECK-SEPARATE %s
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// RUN: llvm-readelf -l rx-no-xosegment | FileCheck --check-prefix=CHECK-MERGED %s
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// CHECK-XO: PHDR
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// CHECK-XO-NEXT: LOAD
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// CHECK-XO-NEXT: LOAD 0x000120 0x0000000000210120 0x0000000000210120 0x00000c 0x00000c E 0x10000
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/// Index should match the index of the LOAD segment above.
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// CHECK-XO: 02 .text .foo
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// CHECK-MERGED: PHDR
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// CHECK-MERGED-NEXT: LOAD
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// CHECK-MERGED-NEXT: LOAD 0x000120 0x0000000000210120 0x0000000000210120 0x00000c 0x00000c R E 0x10000
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/// Index should match the index of the LOAD segment above.
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// CHECK-MERGED: 02 .text .foo
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// CHECK-SEPARATE: PHDR
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// CHECK-SEPARATE-NEXT: LOAD
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// CHECK-SEPARATE-NEXT: LOAD 0x000158 0x0000000000210158 0x0000000000210158 0x000008 0x000008 E 0x10000
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// CHECK-SEPARATE-NEXT: LOAD 0x000160 0x0000000000220160 0x0000000000220160 0x000004 0x000004 R E 0x10000
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/// Index should match the index of the LOAD segment above.
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// CHECK-SEPARATE: 02 .text
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// CHECK-SEPARATE: 03 .foo
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//--- start.s
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.section .text,"axy",@progbits,unique,0
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.global _start
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_start:
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bl foo
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ret
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//--- xo.s
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.section .foo,"axy",@progbits,unique,0
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.global foo
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foo:
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ret
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//--- rx.s
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/// Ensure that the implicitly-created .text section has the SHF_AARCH64_PURECODE flag.
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.section .text,"axy",@progbits,unique,0
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.section .foo,"ax",@progbits,unique,0
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.global foo
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foo:
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ret
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