de3cef1d5d
SHT_NOTE is the section that consists of namesz, descsz, type, name + padding, desc + padding data. This patch teaches yaml2obj, obj2yaml to dump and parse them. This patch implements the section how it is described here: https://docs.oracle.com/cd/E23824_01/html/819-0690/chapter6-18048.html Which says: "For 64–bit objects and 32–bit objects, each entry is an array of 4-byte words in the format of the target processor" The official specification is different http://www.sco.com/developers/gabi/latest/ch5.pheader.html#note_section And says: "n 64-bit objects (files with e_ident[EI_CLASS] equal to ELFCLASS64), each entry is an array of 8-byte words in the format of the target processor. In 32-bit objects (files with e_ident[EI_CLASS] equal to ELFCLASS32), each entry is an array of 4-byte words in the format of the target processor" Since LLVM uses the first, 32-bit way, this patch follows it. Differential revision: https://reviews.llvm.org/D68983
56 lines
1.9 KiB
Plaintext
56 lines
1.9 KiB
Plaintext
# RUN: yaml2obj %s -o %t
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# RUN: llvm-objcopy --set-section-alignment .foo=4 --set-section-alignment .bar=0x5 \
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# RUN: --set-section-alignment .baz=0 %t %t.2
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# RUN: llvm-readobj --sections %t.2 | FileCheck --check-prefix=CHECK %s
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# CHECK: Name: .foo
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# CHECK: AddressAlignment:
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# CHECK-SAME: 4{{$}}
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# CHECK: Name: .bar
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# CHECK: AddressAlignment:
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# CHECK-SAME: 5{{$}}
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# CHECK: Name: .baz
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# CHECK: AddressAlignment:
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# CHECK-SAME: 0{{$}}
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## If a section is specified multiple times, the last wins.
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# RUN: llvm-objcopy --set-section-alignment .foo=4 --set-section-alignment=.foo=7 %t %t.3
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# RUN: llvm-readobj --sections %t.3 | FileCheck --check-prefix=MULTI %s
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# MULTI: Name: .foo
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# MULTI: AddressAlignment:
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# MULTI-SAME: 7{{$}}
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## Ignore the option if the section does not exist.
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# RUN: llvm-objcopy --set-section-alignment .not_exist=4 %t.3 %t.4
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# RUN: cmp %t.3 %t.4
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# RUN: not llvm-objcopy --set-section-alignment=.foo %t /dev/null 2>&1 | \
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# RUN: FileCheck --check-prefix=MISSING-EQUAL %s
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# MISSING-EQUAL: error: bad format for --set-section-alignment: missing '='
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# RUN: not llvm-objcopy --set-section-alignment==4 %t /dev/null 2>&1 | \
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# RUN: FileCheck --check-prefix=MISSING-SECTION %s
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# MISSING-SECTION: error: bad format for --set-section-alignment: missing section name
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# RUN: not llvm-objcopy --set-section-alignment=.foo=bar %t /dev/null 2>&1 | \
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# RUN: FileCheck --check-prefix=INVALID-ALIGN %s
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# INVALID-ALIGN: error: invalid alignment for --set-section-alignment: 'bar'
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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_REL
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Machine: EM_X86_64
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Sections:
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- Name: .foo
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Type: SHT_PROGBITS
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- Name: .bar
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Type: SHT_NOBITS
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- Name: .baz
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Type: SHT_NOTE
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AddressAlign: 4
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Notes: []
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