309 lines
10 KiB
Plaintext
309 lines
10 KiB
Plaintext
## Check how the GNU Hash section is dumped with --gnu-hash-table.
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# RUN: yaml2obj --docnum=1 -DBITS=64 %s -o %t.x64
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# RUN: yaml2obj --docnum=1 -DBITS=32 %s -o %t.x32
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# RUN: llvm-readobj --gnu-hash-table %t.x64 | FileCheck %s
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# RUN: llvm-readelf --gnu-hash-table %t.x64 | FileCheck %s
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# RUN: llvm-readobj --gnu-hash-table %t.x32 | FileCheck %s
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# RUN: llvm-readelf --gnu-hash-table %t.x32 | FileCheck %s
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# CHECK: GnuHashTable {
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# CHECK-NEXT: Num Buckets: 3
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# CHECK-NEXT: First Hashed Symbol Index: 1
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# CHECK-NEXT: Num Mask Words: 2
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# CHECK-NEXT: Shift Count: 2
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# CHECK-NEXT: Bloom Filter: [0x3, 0x4]
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# CHECK-NEXT: Buckets: [5, 6, 7]
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# CHECK-NEXT: Values: [0x8, 0x9, 0xA, 0xB]
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# CHECK-NEXT: }
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--- !ELF
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FileHeader:
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Class: ELFCLASS[[BITS]]
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Data: ELFDATA2LSB
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Type: ET_DYN
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Sections:
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- Name: .gnu.hash
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Type: SHT_GNU_HASH
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Flags: [ SHF_ALLOC ]
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Header:
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SymNdx: 0x1
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Shift2: 0x2
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## The number of words in the Bloom filter. The value of 2 is no-op.
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MaskWords: [[MASKWORDS=2]]
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## The number of hash buckets. The value of 3 is no-op.
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NBuckets: [[NBUCKETS=3]]
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BloomFilter: [0x3, 0x4]
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HashBuckets: [0x5, 0x6, 0x7]
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HashValues: [0x8, 0x9, 0xA, 0xB]
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- Name: .dynamic
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Type: SHT_DYNAMIC
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Flags: [ SHF_ALLOC ]
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Link: .dynstr
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Entries:
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- Tag: DT_GNU_HASH
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Value: 0x0
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- Tag: DT_NULL
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Value: 0x0
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DynamicSymbols:
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- Name: aaa
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Binding: STB_GLOBAL
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- Name: bbb
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Binding: STB_GLOBAL
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- Name: ccc
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Binding: STB_GLOBAL
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- Name: ddd
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Binding: STB_GLOBAL
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ProgramHeaders:
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- Type: PT_LOAD
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Flags: [ PF_R, PF_X ]
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FirstSec: .gnu.hash
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LastSec: .dynamic
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## Check we report a warning if there is no dynamic symbol section in the object.
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# RUN: yaml2obj --docnum=2 %s -o %t.nodynsym
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# RUN: llvm-readobj --gnu-hash-table %t.nodynsym 2>&1 | FileCheck %s -DFILE=%t.nodynsym --check-prefix=NODYNSYM
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# RUN: llvm-readelf --gnu-hash-table %t.nodynsym 2>&1 | FileCheck %s -DFILE=%t.nodynsym --check-prefix=NODYNSYM
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# NODYNSYM: GnuHashTable {
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# NODYNSYM-NEXT: Num Buckets: 1
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# NODYNSYM-NEXT: First Hashed Symbol Index: 0
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# NODYNSYM-NEXT: Num Mask Words: 1
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# NODYNSYM-NEXT: Shift Count: 0
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# NODYNSYM-NEXT: Bloom Filter: [0x0]
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# NODYNSYM-NEXT: Buckets: [0]
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# NODYNSYM-NEXT: warning: '[[FILE]]': unable to dump 'Values' for the SHT_GNU_HASH section: no dynamic symbol table found
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# NODYNSYM-NEXT: }
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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_DYN
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Sections:
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- Name: .gnu.hash
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Type: SHT_GNU_HASH
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Flags: [ SHF_ALLOC ]
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Header:
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SymNdx: 0x0
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Shift2: 0x0
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BloomFilter: [ 0x0 ]
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HashBuckets: [ 0x0 ]
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HashValues: [ 0x0 ]
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- Name: .dynamic
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Type: SHT_DYNAMIC
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Flags: [ SHF_ALLOC ]
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Entries:
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- Tag: DT_GNU_HASH
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Value: 0x0
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- Tag: DT_NULL
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Value: 0x0
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ProgramHeaders:
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- Type: PT_LOAD
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Flags: [ PF_R, PF_X ]
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FirstSec: .gnu.hash
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LastSec: .dynamic
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## Check what we do when the index of the first symbol in the dynamic symbol table
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## included in the hash table is larger than the number of dynamic symbols.
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# RUN: yaml2obj --docnum=3 %s -o %t.brokensymndx
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# RUN: llvm-readobj --gnu-hash-table %t.brokensymndx 2>&1 \
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# RUN: | FileCheck %s -DFILE=%t.brokensymndx --check-prefix=SYMNDX
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# RUN: llvm-readelf --gnu-hash-table %t.brokensymndx 2>&1 \
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# RUN: | FileCheck %s -DFILE=%t.brokensymndx --check-prefix=SYMNDX
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# SYMNDX: GnuHashTable {
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# SYMNDX-NEXT: Num Buckets: 1
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# SYMNDX-NEXT: First Hashed Symbol Index: 2
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# SYMNDX-NEXT: Num Mask Words: 1
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# SYMNDX-NEXT: Shift Count: 0
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# SYMNDX-NEXT: Bloom Filter: [0x1]
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# SYMNDX-NEXT: Buckets: [2]
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# SYMNDX-NEXT: warning: '[[FILE]]': unable to dump 'Values' for the SHT_GNU_HASH section: the first hashed symbol index (2) is greater than or equal to the number of dynamic symbols (2)
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# SYMNDX-NEXT: }
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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_DYN
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Sections:
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- Name: .gnu.hash
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Type: SHT_GNU_HASH
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Flags: [ SHF_ALLOC ]
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Header:
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SymNdx: 0x2
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Shift2: 0x0
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BloomFilter: [ 0x1 ]
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HashBuckets: [ 0x2 ]
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HashValues: [ 0x3 ]
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- Name: .dynamic
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Type: SHT_DYNAMIC
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Flags: [ SHF_ALLOC ]
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Link: 0
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Entries:
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- Tag: DT_GNU_HASH
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Value: 0x0
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- Tag: DT_NULL
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Value: 0x0
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DynamicSymbols:
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- Name: aaa
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Binding: STB_GLOBAL
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ProgramHeaders:
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- Type: PT_LOAD
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Flags: [ PF_R, PF_X ]
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FirstSec: .gnu.hash
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LastSec: .dynamic
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## Check we emit a warning when the dynamic symbol table is empty.
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## A valid dynamic symbol table should have at least one symbol: the symbol with index 0.
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# RUN: yaml2obj --docnum=4 %s -o %t.emptydynsym
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# RUN: llvm-readobj --gnu-hash-table %t.emptydynsym 2>&1 \
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# RUN: | FileCheck %s -DFILE=%t.emptydynsym --check-prefix=EMPTY-DYNSYM
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# RUN: llvm-readelf --gnu-hash-table %t.emptydynsym 2>&1 \
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# RUN: | FileCheck %s -DFILE=%t.emptydynsym --check-prefix=EMPTY-DYNSYM
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# EMPTY-DYNSYM: GnuHashTable {
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# EMPTY-DYNSYM-NEXT: Num Buckets: 1
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# EMPTY-DYNSYM-NEXT: First Hashed Symbol Index: 0
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# EMPTY-DYNSYM-NEXT: Num Mask Words: 1
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# EMPTY-DYNSYM-NEXT: Shift Count: 0
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# EMPTY-DYNSYM-NEXT: Bloom Filter: [0x0]
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# EMPTY-DYNSYM-NEXT: Buckets: [0]
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# EMPTY-DYNSYM-NEXT: warning: '[[FILE]]': unable to dump 'Values' for the SHT_GNU_HASH section: the dynamic symbol table is empty
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# EMPTY-DYNSYM-NEXT: }
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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_DYN
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Sections:
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- Name: .gnu.hash
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Type: SHT_GNU_HASH
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Flags: [ SHF_ALLOC ]
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Header:
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SymNdx: 0x0
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Shift2: 0x0
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BloomFilter: [ 0x0 ]
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HashBuckets: [ 0x0 ]
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HashValues: [ 0x0 ]
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- Name: .dynamic
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Type: SHT_DYNAMIC
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Flags: [ SHF_ALLOC ]
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Link: 0
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Entries:
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- Tag: DT_GNU_HASH
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Value: 0x0
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- Tag: DT_NULL
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Value: 0x0
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- Name: .dynsym
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Type: SHT_DYNSYM
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Size: 0
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ProgramHeaders:
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- Type: PT_LOAD
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Flags: [ PF_R, PF_X ]
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FirstSec: .gnu.hash
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LastSec: .dynamic
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## Linkers might produce an empty no-op SHT_GNU_HASH section when
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## there are no dynamic symbols or when all dynamic symbols are undefined.
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## Such sections normally have a single zero entry in the bloom
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## filter, a single zero entry in the hash bucket and no values.
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##
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## The index of the first symbol in the dynamic symbol table
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## included in the hash table can be set to the number of dynamic symbols,
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## which is one larger than the index of the last dynamic symbol.
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## For empty tables however, this value is unimportant and can be ignored.
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## Case A: set the index of the first symbol in the dynamic symbol table to
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## the number of dynamic symbols.
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# RUN: yaml2obj --docnum=5 -DSYMNDX=0x1 %s -o %t.empty.1
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# RUN: llvm-readobj --gnu-hash-table %t.empty.1 2>&1 \
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# RUN: | FileCheck %s -DFILE=%t.empty.1 -DSYMNDX=1 --check-prefix=EMPTY --implicit-check-not="warning:"
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# RUN: llvm-readelf --gnu-hash-table %t.empty.1 2>&1 \
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# RUN: | FileCheck %s -DFILE=%t.empty.1 -DSYMNDX=1 --check-prefix=EMPTY --implicit-check-not="warning:"
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## Case B: set the index of the first symbol in the dynamic symbol table to
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## an arbitrary value that is larger than the number of dynamic symbols.
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# RUN: yaml2obj --docnum=5 -DSYMNDX=0x2 %s -o %t.empty.2
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# RUN: llvm-readobj --gnu-hash-table %t.empty.2 2>&1 \
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# RUN: | FileCheck %s -DFILE=%t.empty.2 -DSYMNDX=2 --check-prefix=EMPTY --implicit-check-not="warning:"
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# RUN: llvm-readelf --gnu-hash-table %t.empty.2 2>&1 \
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# RUN: | FileCheck %s -DFILE=%t.empty.2 -DSYMNDX=2 --check-prefix=EMPTY --implicit-check-not="warning:"
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# EMPTY: GnuHashTable {
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# EMPTY-NEXT: Num Buckets: 1
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# EMPTY-NEXT: First Hashed Symbol Index: [[SYMNDX]]
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# EMPTY-NEXT: Num Mask Words: 1
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# EMPTY-NEXT: Shift Count: 0
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# EMPTY-NEXT: Bloom Filter: [0x0]
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# EMPTY-NEXT: Buckets: [0]
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# EMPTY-NEXT: Values: []
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# EMPTY-NEXT: }
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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_DYN
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Sections:
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- Name: .gnu.hash
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Type: SHT_GNU_HASH
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Flags: [ SHF_ALLOC ]
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Header:
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SymNdx: [[SYMNDX]]
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Shift2: 0x0
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BloomFilter: [ 0x0 ]
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HashBuckets: [ 0x0 ]
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HashValues: [ ]
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- Name: .dynamic
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Type: SHT_DYNAMIC
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Flags: [ SHF_ALLOC ]
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Link: 0
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Entries:
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- Tag: DT_GNU_HASH
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Value: 0x0
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- Tag: DT_NULL
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Value: 0x0
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DynamicSymbols: []
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ProgramHeaders:
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- Type: PT_LOAD
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Flags: [ PF_R, PF_X ]
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FirstSec: .gnu.hash
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LastSec: .dynamic
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## Check we report a proper warning when a hash table goes past the end of the file.
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## Case A: the 'maskwords' field is set so that the table goes past the end of the file.
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# RUN: yaml2obj --docnum=1 -DBITS=64 -DMACHINE=EM_X86_64 -D MASKWORDS=4294967295 %s -o %t.err.maskwords
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# RUN: llvm-readobj --gnu-hash-table %t.err.maskwords 2>&1 | \
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# RUN: FileCheck %s -DFILE=%t.err.maskwords -DMASKWORDS=4294967295 -DNBUCKETS=3 --check-prefix=ERR
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# RUN: llvm-readelf --gnu-hash-table %t.err.maskwords 2>&1 | \
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# RUN: FileCheck %s -DFILE=%t.err.maskwords -DMASKWORDS=4294967295 -DNBUCKETS=3 --check-prefix=ERR
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## Case B: the 'nbuckets' field is set so that the table goes past the end of the file.
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# RUN: yaml2obj --docnum=1 -DBITS=64 -DMACHINE=EM_X86_64 -D NBUCKETS=4294967295 %s -o %t.err.nbuckets
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# RUN: llvm-readobj --gnu-hash-table %t.err.nbuckets 2>&1 | \
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# RUN: FileCheck %s -DFILE=%t.err.nbuckets -DMASKWORDS=2 -DNBUCKETS=4294967295 --check-prefix=ERR
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# RUN: llvm-readelf --gnu-hash-table %t.err.nbuckets 2>&1 | \
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# RUN: FileCheck %s -DFILE=%t.err.nbuckets -DMASKWORDS=2 -DNBUCKETS=4294967295 --check-prefix=ERR
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# ERR: GnuHashTable {
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# ERR-NEXT: Num Buckets: [[NBUCKETS]]
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# ERR-NEXT: First Hashed Symbol Index: 1
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# ERR-NEXT: Num Mask Words: [[MASKWORDS]]
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# ERR-NEXT: Shift Count: 2
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# ERR-NEXT: warning: '[[FILE]]': unable to dump the SHT_GNU_HASH section at 0x78: it goes past the end of the file
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# ERR-NEXT: }
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## Check we report a single warning about the broken GNU hash table when both
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## --gnu-hash-table and --elf-hash-histogram options are requested.
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# RUN: llvm-readelf --gnu-hash-table --elf-hash-histogram %t.err.nbuckets 2>&1 | \
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# RUN: FileCheck %s -DFILE=%t.err.nbuckets -DMASKWORDS=2 -DNBUCKETS=4294967295 --check-prefix=ERR --implicit-check-not=warning
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