a7a447be0f
Imagine we have a YAML declaration of few sections: `foo1`, `<unnamed 2>`, `foo3`, `foo4`. To put them into segment we can do (1*): ``` Sections: - Section: foo1 - Section: foo4 ``` or we can use (2*): ``` Sections: - Section: foo1 - Section: foo3 - Section: foo4 ``` or (3*) : ``` Sections: - Section: foo1 ## "(index 2)" here is a name that we automatically created for a unnamed section. - Section: (index 2) - Section: foo3 - Section: foo4 ``` It looks really confusing that we don't have to list all of sections. At first I've tried to make this rule stricter and report an error when there is a gap (i.e. when a section is included into segment, but not listed explicitly). This did not work perfect, because such approach conflicts with unnamed sections/fills (see (3*)). This patch drops "Sections" key and introduces 2 keys instead: `FirstSec` and `LastSec`. Both are optional. Differential revision: https://reviews.llvm.org/D90458
154 lines
4.8 KiB
Plaintext
154 lines
4.8 KiB
Plaintext
## Show that llvm-readobj/llvm-readelf tools sometimes can dump the
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## dynamic table when it is not in a PT_DYNAMIC segment.
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## Case 1: The dynamic table found using the dynamic program header is corrupted
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## (<size of data> % <size of dynamic entry> != 0). So the table is taken
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## from the section header.
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# RUN: yaml2obj --docnum=1 %s -o %t1.o
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# RUN: llvm-readobj --dynamic-table %t1.o 2>&1 \
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# RUN: | FileCheck -DFILE=%t1.o --check-prefixes=WARNING1,LLVM1 %s
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# RUN: llvm-readelf --dynamic-table %t1.o 2>&1 \
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# RUN: | FileCheck -DFILE=%t1.o --check-prefixes=WARNING1,GNU1 %s
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# WARNING1: warning: '[[FILE]]': SHT_DYNAMIC section with index 1 is not contained within the PT_DYNAMIC segment
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# WARNING1: warning: '[[FILE]]': invalid PT_DYNAMIC size (0x1){{$}}
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# WARNING1: warning: '[[FILE]]': SHT_DYNAMIC section header and PT_DYNAMIC program header disagree about the location of the dynamic table
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# WARNING1: warning: '[[FILE]]': PT_DYNAMIC dynamic table is invalid: SHT_DYNAMIC will be used
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# LLVM1: DynamicSection [ (2 entries)
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# LLVM1-NEXT: Tag Type Name/Value
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# LLVM1-NEXT: 0x0000000000000018 BIND_NOW 0x1
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# LLVM1-NEXT: 0x0000000000000000 NULL 0x0
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# LLVM1-NEXT: ]
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# GNU1: Dynamic section at offset 0x{{.*}} contains 2 entries:
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# GNU1-NEXT: Tag Type Name/Value
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# GNU1-NEXT: 0x0000000000000018 (BIND_NOW) 0x1
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# GNU1-NEXT: 0x0000000000000000 (NULL) 0x0
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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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Sections:
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- Name: .dynamic
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Type: SHT_DYNAMIC
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Flags: [SHF_ALLOC]
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Address: 0x1000
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AddressAlign: 0x1000
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Entries:
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- Tag: DT_BIND_NOW
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Value: 0x1
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- Tag: DT_NULL
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Value: 0x0
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- Name: .text
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Type: SHT_PROGBITS
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Flags: [SHF_ALLOC]
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Address: 0x1100
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AddressAlign: 0x100
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Content: "00"
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ProgramHeaders:
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- Type: PT_LOAD
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VAddr: 0x1000
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FirstSec: .dynamic
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LastSec: .text
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- Type: PT_DYNAMIC
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VAddr: 0x1000
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FirstSec: .text
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LastSec: .text
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## Case 2: The dynamic table found using the dynamic program header is different from the
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## table found using the section header table.
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# RUN: yaml2obj --docnum=2 %s -o %t2.o
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# RUN: llvm-readobj --dynamic-table %t2.o 2>&1 \
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# RUN: | FileCheck -DFILE=%t2.o --check-prefixes=WARNING2,LLVM2 %s
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# RUN: llvm-readelf --dynamic-table %t2.o 2>&1 \
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# RUN: | FileCheck -DFILE=%t2.o --check-prefixes=WARNING2,GNU2 %s
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# WARNING2: warning: '[[FILE]]': SHT_DYNAMIC section with index 1 is not contained within the PT_DYNAMIC segment
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# WARNING2: warning: '[[FILE]]': SHT_DYNAMIC section header and PT_DYNAMIC program header disagree about the location of the dynamic table
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# LLVM2: DynamicSection [ (1 entries)
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# LLVM2-NEXT: Tag Type Name/Value
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# LLVM2-NEXT: 0x0000000000000000 NULL 0x0
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# LLVM2-NEXT: ]
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# GNU2: Dynamic section at offset 0x{{.*}} contains 1 entries:
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# GNU2-NEXT: Tag Type Name/Value
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# GNU2-NEXT: 0x0000000000000000 (NULL) 0x0
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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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Sections:
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- Name: .dynamic
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Type: SHT_DYNAMIC
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Flags: [SHF_ALLOC]
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Address: 0x1000
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AddressAlign: 0x1000
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Entries:
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- Tag: DT_BIND_NOW
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Value: 0x1
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- Tag: DT_NULL
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Value: 0x0
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- Name: .text
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Type: SHT_PROGBITS
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Flags: [SHF_ALLOC]
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Address: 0x1100
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AddressAlign: 0x100
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Content: "00000000000000000000000000000000"
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ProgramHeaders:
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- Type: PT_LOAD
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VAddr: 0x1000
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FirstSec: .dynamic
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LastSec: .text
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- Type: PT_DYNAMIC
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VAddr: 0x1000
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FirstSec: .text
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LastSec: .text
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## Case 3: Both dynamic tables found using SHT_DYNAMIC/PT_DYNAMIC are corrupted.
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# RUN: yaml2obj --docnum=3 %s -o %t3.o
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# RUN: llvm-readobj --dynamic-table %t3.o 2>&1 \
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# RUN: | FileCheck -DFILE=%t3.o --check-prefix=WARNING3 --implicit-check-not="Dynamic" %s
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# RUN: llvm-readelf --dynamic-table %t3.o 2>&1 \
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# RUN: | FileCheck -DFILE=%t3.o --check-prefix=WARNING3 --implicit-check-not="Dynamic" %s
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# WARNING3: warning: '[[FILE]]': invalid PT_DYNAMIC size (0x1){{$}}
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# WARNING3: warning: '[[FILE]]': SHT_DYNAMIC section header and PT_DYNAMIC program header disagree about the location of the dynamic table
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# WARNING3: warning: '[[FILE]]': no valid dynamic table was found
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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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Sections:
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- Name: .dynamic
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Type: SHT_DYNAMIC
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Flags: [SHF_ALLOC]
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Address: 0x1000
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AddressAlign: 0x1000
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Content: "00"
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- Name: .text
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Type: SHT_PROGBITS
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Flags: [SHF_ALLOC]
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Address: 0x1100
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AddressAlign: 0x100
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Content: "00"
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ProgramHeaders:
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- Type: PT_LOAD
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VAddr: 0x1000
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FirstSec: .dynamic
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LastSec: .text
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- Type: PT_DYNAMIC
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VAddr: 0x1000
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FirstSec: .text
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LastSec: .text
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