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20e541caa9
The original -O binary implementation just copied segment data from the object and dumped it into a file. This doesn't take into account any operations performed on objects such as section removal. GNU objcopy has some specific behavior that we'd also like to respect. For instance using -O binary and -j <some_section> will dump <some_section> to a file. This change implements GNU objcopy style -O binary to as close of an approximation as I can determine. Differential Revision: https://reviews.llvm.org/D39713 llvm-svn: 318324
51 lines
1.5 KiB
Plaintext
51 lines
1.5 KiB
Plaintext
# This test has a subtle purpose. Because of the specifics of the layout
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# algorithm if we're not careful cycles can occur when we resolve the order
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# that we should layout segments in. In this test we're making sure that the
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# PT_LOAD segment won't set the PT_NOTE segment as the first to be laid out
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# while the PT_NOTE segment sets the PT_LOAD load to be the first to be laid
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# out. This problem becomes visible if the layout of the file changes due to
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# the removal of a section. We use -O binary here because removing a section
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# in this way won't cause the location of the PT_LOAD segment to change if we
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# don't.
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# RUN: yaml2obj %s -o %t
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# RUN: llvm-objcopy -R=.note -O binary %t %t2
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# RUN: od -Ax -t x1 %t2 | FileCheck %s
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!ELF
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FileHeader:
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Class: ELFCLASS64
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Data: ELFDATA2LSB
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Type: ET_EXEC
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Machine: EM_X86_64
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Sections:
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- Name: .note
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Type: SHT_PROGBITS
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Flags: [ SHF_ALLOC ]
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Address: 0x1000
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AddressAlign: 0x1000
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Content: "32323232"
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Size: 32
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- Name: .rodata
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Flags: [ SHF_ALLOC ]
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Type: SHT_PROGBITS
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Address: 0x1020
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Size: 4064
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Content: "DEADBEEF"
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ProgramHeaders:
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- Type: PT_LOAD
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Flags: [ PF_R ]
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VAddr: 0x1000
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PAddr: 0x1000
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Sections:
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- Section: .note
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- Section: .rodata
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- Type: PT_NOTE
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Flags: [ PF_R ]
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VAddr: 0x1000
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PAddr: 0x1000
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Sections:
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- Section: .note
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# CHECK: 000000 de ad be ef
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