derek.holloway
7502bf64a4
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126 lines
4.5 KiB
Plaintext
126 lines
4.5 KiB
Plaintext
# REQUIRES: x86
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# RUN: split-file %s %t
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# RUN: llvm-mc -filetype=obj -triple=x86_64 %t/a.s -o %t/a.o
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## --randomize-section-padding= inserts segment offset padding and pre-section
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## padding, and does not affect flags. Segment offset padding is only inserted
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## when PT_LOAD changes, as shown by .bss size (.data and .bss share a PT_LOAD).
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# RUN: ld.lld --randomize-section-padding=6 %t/a.o -o %t/a.out
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# RUN: llvm-readelf -sS -x .rodata -x .text -x .data %t/a.out | FileCheck --check-prefix=PAD6 %s
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# PAD6: .rodata PROGBITS 0000000000200158 000158 000b8d 00 A 0 0 1
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# PAD6-NEXT: .text PROGBITS 0000000000201ce8 000ce8 000270 00 AX 0 0 4
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# PAD6-NEXT: .data PROGBITS 0000000000202f58 000f58 000941 00 WA 0 0 1
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# PAD6-NEXT: .bss NOBITS 0000000000203899 001899 000003 00 WA 0 0 1
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# PAD6: 0000000000203899 0 NOTYPE LOCAL DEFAULT 4 a
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# PAD6: 000000000020389a 0 NOTYPE LOCAL DEFAULT 4 b
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# PAD6: 000000000020389b 0 NOTYPE LOCAL DEFAULT 4 c
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# PAD6: Hex dump of section '.rodata':
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# PAD6: 0x00200cd8 00000000 00000000 00000102 03
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# PAD6: Hex dump of section '.text':
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# PAD6: 0x00201f48 cccccccc cccccccc cccccccc 0405cc06
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# PAD6: Hex dump of section '.data':
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# PAD6: 0x00203888 00000000 00000000 00000000 00000708
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# PAD6: 0x00203898 09
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## Size of segment offset padding and location of pre-section padding is
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## dependent on the seed.
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# RUN: ld.lld --randomize-section-padding=46 %t/a.o -o %t/a.out
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# RUN: llvm-readelf -sS -x .rodata -x .text -x .data %t/a.out | FileCheck --check-prefix=PAD46 %s
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# PAD46: .rodata PROGBITS 0000000000200158 000158 000cc0 00 A 0 0 1
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# PAD46-NEXT: .text PROGBITS 0000000000201e18 000e18 0009bf 00 AX 0 0 4
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# PAD46-NEXT: .data PROGBITS 00000000002037d7 0017d7 000540 00 WA 0 0 1
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# PAD46-NEXT: .bss NOBITS 0000000000203d17 001d17 000004 00 WA 0 0 1
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# PAD46: 0000000000203d17 0 NOTYPE LOCAL DEFAULT 4 a
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# PAD46: 0000000000203d18 0 NOTYPE LOCAL DEFAULT 4 b
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# PAD46: 0000000000203d1a 0 NOTYPE LOCAL DEFAULT 4 c
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# PAD46: Hex dump of section '.rodata':
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# PAD46: 0x00200e08 00000000 00000000 00000000 00010203
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# PAD46: Hex dump of section '.text':
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# PAD46: 0x002027c8 cccccccc cccccccc cccccccc 040506
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# PAD46: Hex dump of section '.data':
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# PAD46: 0x00203d07 00000000 00000000 00000000 07000809
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## When there are multiple InputSectionDescriptions for an output section,
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## segment offset padding is inserted in the first InputSectionDescription.
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# RUN: ld.lld --randomize-section-padding=46 %t/a.o %t/a.lds -o %t/a.out
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# RUN: llvm-readelf -sS -x .rodata -x .text -x .data %t/a.out | FileCheck --check-prefix=PAD46-LDS %s
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# PAD46-LDS: .rodata PROGBITS 0000000000000158 000158 000cc0 00 A 0 0 1
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# PAD46-LDS-NEXT: .text PROGBITS 0000000000001000 001000 0009c0 00 AX 0 0 4
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# PAD46-LDS-NEXT: .data PROGBITS 0000000000002000 002000 000540 00 WA 0 0 1
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# PAD46-LDS-NEXT: .bss NOBITS 0000000000002540 002540 000004 00 WA 0 0 1
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# PAD46-LDS: 0000000000002543 0 NOTYPE LOCAL DEFAULT 4 a
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# PAD46-LDS: 0000000000002541 0 NOTYPE LOCAL DEFAULT 4 b
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# PAD46-LDS: 0000000000002540 0 NOTYPE LOCAL DEFAULT 4 c
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# PAD46-LDS: Hex dump of section '.rodata':
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# PAD46-LDS: 0x00000e08 00000000 00000000 00000000 00030201 ................
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# PAD46-LDS: Hex dump of section '.text':
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# PAD46-LDS: 0x000019b0 cccccccc cccccccc cccc0605 04cccccc ................
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# PAD46-LDS: Hex dump of section '.data':
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# PAD46-LDS: 0x00002530 00000000 00000000 00000000 09000807 ................
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#--- a.s
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.section .rodata.a,"a",@progbits
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.byte 1
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.section .rodata.b,"a",@progbits
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.byte 2
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.section .rodata.c,"a",@progbits
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.byte 3
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.section .text.a,"ax",@progbits
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.byte 4
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.section .text.b,"ax",@progbits
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.byte 5
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.section .text.c,"ax",@progbits
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.byte 6
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.section .data.a,"aw",@progbits
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.byte 7
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.section .data.b,"aw",@progbits
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.byte 8
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.section .data.c,"aw",@progbits
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.byte 9
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.section .bss.a,"a",@nobits
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a:
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.zero 1
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.section .bss.b,"a",@nobits
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b:
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.zero 1
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.section .bss.c,"a",@nobits
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c:
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.zero 1
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#--- a.lds
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SECTIONS {
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. = SIZEOF_HEADERS;
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.rodata : { *(.rodata.c) *(.rodata.b) *(.rodata.a) }
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. = ALIGN(CONSTANT(MAXPAGESIZE));
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.text : { *(.text.c) *(.text.b) *(.text.a) }
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. = ALIGN(CONSTANT(MAXPAGESIZE));
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.data : { *(.data.c) *(.data.b) *(.data.a) }
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.bss : { *(.bss.c) *(.bss.b) *(.bss.a) }
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}
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