332 lines
13 KiB
Plaintext
332 lines
13 KiB
Plaintext
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## In this file we have tests for the SHT_SYMTAB_SHNDX section
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## and the DT_SYMTAB_SHNDX dynamic tag.
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## Check that different SHT_SYMTAB_SHNDX sections can be used with different symbol tables.
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## In this test we check that we print different section indexes for regular and dynamic
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## symbol tables that are linked to different SHT_SYMTAB_SHNDX sections.
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# RUN: yaml2obj --docnum=1 %s -o %t1
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# RUN: llvm-readelf --symbols --dyn-syms %t1 2>&1 | FileCheck %s --check-prefix=GNU
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# RUN: llvm-readobj --symbols --dyn-syms %t1 2>&1 | FileCheck %s --check-prefix=LLVM
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# GNU: Symbol table '.dynsym' contains 3 entries:
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# GNU-NEXT: Num: Value Size Type Bind Vis Ndx Name
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# GNU-NEXT: 0: 00000000 0 NOTYPE LOCAL DEFAULT UND
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# GNU-NEXT: 1: 00000000 0 NOTYPE LOCAL DEFAULT 3 dynsym1
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# GNU-NEXT: 2: 00000000 0 NOTYPE LOCAL DEFAULT 2 dynsym2
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# GNU: Symbol table '.symtab' contains 3 entries:
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# GNU-NEXT: Num: Value Size Type Bind Vis Ndx Name
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# GNU-NEXT: 0: 00000000 0 NOTYPE LOCAL DEFAULT UND
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# GNU-NEXT: 1: 00000000 0 NOTYPE LOCAL DEFAULT 2 sym1
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# GNU-NEXT: 2: 00000000 0 NOTYPE LOCAL DEFAULT 1 sym2
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# LLVM: Symbols [
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# LLVM-NEXT: Symbol {
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# LLVM-NEXT: Name: (0)
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# LLVM: Section: Undefined (0x0)
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# LLVM-NEXT: }
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# LLVM-NEXT: Symbol {
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# LLVM-NEXT: Name: sym1 (6)
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# LLVM: Section: .section2 (0x2)
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# LLVM-NEXT: }
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# LLVM-NEXT: Symbol {
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# LLVM-NEXT: Name: sym2 (1)
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# LLVM: Section: .section1 (0x1)
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# LLVM-NEXT: }
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# LLVM-NEXT: ]
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# LLVM: DynamicSymbols [
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# LLVM-NEXT: Symbol {
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# LLVM-NEXT: Name: (0)
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# LLVM: Section: Undefined (0x0)
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# LLVM-NEXT: }
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# LLVM-NEXT: Symbol {
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# LLVM-NEXT: Name: dynsym1 (9)
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# LLVM: Section: .section3 (0x3)
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# LLVM-NEXT: }
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# LLVM-NEXT: Symbol {
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# LLVM-NEXT: Name: dynsym2 (1)
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# LLVM: Section: .section2 (0x2)
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# LLVM-NEXT: }
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# LLVM-NEXT: ]
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--- !ELF
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FileHeader:
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Class: ELFCLASS32
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Data: ELFDATA2LSB
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Type: ET_REL
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Sections:
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- Name: .section1
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Type: SHT_PROGBITS
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- Name: .section2
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Type: SHT_PROGBITS
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- Name: .section3
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Type: SHT_PROGBITS
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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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Offset: 0x1000
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Entries:
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- Tag: [[TAGNAME=DT_SYMTAB_SHNDX]]
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Value: [[SYMTABSHNDX=0x2100]] ## Address of .bar section.
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- Tag: DT_NULL
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Value: 0
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## By naming the SHT_SYMTAB_SHNDX sections to .foo and .bar we verify that we
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## don't use their names to locate them.
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- Name: .foo
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Type: SHT_SYMTAB_SHNDX
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Flags: [ SHF_ALLOC ]
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Link: [[SHNDXLINK=.symtab]]
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Entries: [ 0, 2, 1 ]
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Offset: 0x2000
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Address: 0x2000
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- Name: .bar
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Type: SHT_SYMTAB_SHNDX
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Flags: [ SHF_ALLOC ]
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Link: .dynsym
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Entries: [ 0, 3, 2 ]
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Offset: 0x2100
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Address: 0x2100
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Symbols:
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- Name: sym1
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Index: SHN_XINDEX
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- Name: sym2
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Index: SHN_XINDEX
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DynamicSymbols:
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- Name: dynsym1
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Index: SHN_XINDEX
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- Name: dynsym2
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Index: SHN_XINDEX
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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: .bar
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- Type: PT_DYNAMIC
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VAddr: 0x1000
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FirstSec: .dynamic
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LastSec: .dynamic
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## Check that we locate the SHT_SYMTAB_SHNDX section using the DT_SYMTAB_SHNDX
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## dynamic tag when dumping dynamic symbols. In this case we make the value of
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## DT_SYMTAB_SHNDX point to the SHT_SYMTAB_SHNDX section that is
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## linked with the static symbol table and check that we use it.
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# RUN: yaml2obj --docnum=1 -DSYMTABSHNDX=0x2000 %s -o %t2
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# RUN: llvm-readelf --dyn-syms %t2 2>&1 | FileCheck %s --check-prefix=DYNTAG-GNU
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# RUN: llvm-readobj --dyn-syms %t2 2>&1 | FileCheck %s --check-prefix=DYNTAG-LLVM
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# DYNTAG-GNU: Symbol table '.dynsym' contains 3 entries:
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# DYNTAG-GNU-NEXT: Num: Value Size Type Bind Vis Ndx Name
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# DYNTAG-GNU-NEXT: 0: 00000000 0 NOTYPE LOCAL DEFAULT UND
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# DYNTAG-GNU-NEXT: 1: 00000000 0 NOTYPE LOCAL DEFAULT 2 dynsym1
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# DYNTAG-GNU-NEXT: 2: 00000000 0 NOTYPE LOCAL DEFAULT 1 dynsym2
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# DYNTAG-LLVM: Name: dynsym1 (9)
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# DYNTAG-LLVM: Section: .section2 (0x2)
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# DYNTAG-LLVM-NEXT: }
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# DYNTAG-LLVM-NEXT: Symbol {
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# DYNTAG-LLVM-NEXT: Name: dynsym2 (1)
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# DYNTAG-LLVM: Section: .section1 (0x1)
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# DYNTAG-LLVM-NEXT: }
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# DYNTAG-LLVM-NEXT: ]
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## Check that we report a warning when we dump a dynamic symbol table that
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## contains symbols with extended indices, but we don't have a DT_SYMTAB_SHNDX tag to locate
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## the corresponding extended indexes table.
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# RUN: yaml2obj --docnum=1 -DTAGNAME=0x0 -DSYMTABSHNDX=0x0 %s -o %t3
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# RUN: llvm-readelf --symbols --dyn-syms %t3 2>&1 | FileCheck %s -DFILE=%t3 --check-prefix=NOTAG-GNU
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# RUN: llvm-readobj --symbols --dyn-syms %t3 2>&1 | FileCheck %s -DFILE=%t3 --check-prefix=NOTAG-LLVM
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# NOTAG-GNU: Symbol table '.dynsym' contains 3 entries:
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# NOTAG-GNU-NEXT: Num: Value Size Type Bind Vis Ndx Name
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# NOTAG-GNU-NEXT: 0: 00000000 0 NOTYPE LOCAL DEFAULT UND
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# NOTAG-GNU-NEXT: warning: '[[FILE]]': found an extended symbol index (1), but unable to locate the extended symbol index table
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# NOTAG-GNU-NEXT: 1: 00000000 0 NOTYPE LOCAL DEFAULT RSV[0xffff] dynsym1
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# NOTAG-GNU-NEXT: warning: '[[FILE]]': found an extended symbol index (2), but unable to locate the extended symbol index table
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# NOTAG-GNU-NEXT: 2: 00000000 0 NOTYPE LOCAL DEFAULT RSV[0xffff] dynsym2
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# NOTAG-LLVM: Symbol {
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# NOTAG-LLVM: Name: dynsym1 (9)
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# NOTAG-LLVM-NEXT: Value: 0x0
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# NOTAG-LLVM-NEXT: Size: 0
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# NOTAG-LLVM-NEXT: Binding: Local (0x0)
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# NOTAG-LLVM-NEXT: Type: None (0x0)
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# NOTAG-LLVM-NEXT: Other: 0
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# NOTAG-LLVM-NEXT: warning: '[[FILE]]': found an extended symbol index (1), but unable to locate the extended symbol index table
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# NOTAG-LLVM-NEXT: Section: Reserved (0xFFFF)
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# NOTAG-LLVM-NEXT: }
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# NOTAG-LLVM-NEXT: Symbol {
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# NOTAG-LLVM-NEXT: Name: dynsym2 (1)
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# NOTAG-LLVM-NEXT: Value: 0x0
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# NOTAG-LLVM-NEXT: Size: 0
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# NOTAG-LLVM-NEXT: Binding: Local (0x0)
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# NOTAG-LLVM-NEXT: Type: None (0x0)
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# NOTAG-LLVM-NEXT: Other: 0
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# NOTAG-LLVM-NEXT: warning: '[[FILE]]': found an extended symbol index (2), but unable to locate the extended symbol index table
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# NOTAG-LLVM-NEXT: Section: Reserved (0xFFFF)
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# NOTAG-LLVM-NEXT: }
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## In this case we have a SHT_SYMTAB_SHNDX section with a sh_link field that has a
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## value that is larger than the number of sections. Check we report a warning.
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# RUN: yaml2obj --docnum=1 -DSHNDXLINK=0xFF %s -o %t4
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# RUN: llvm-readelf --symbols --dyn-syms %t4 2>&1 | \
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# RUN: FileCheck %s -DFILE=%t4 --check-prefixes=BROKENLINK,BROKENLINK-GNU --implicit-check-not=warning:
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# RUN: llvm-readobj --symbols --dyn-syms %t4 2>&1 | \
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# RUN: FileCheck %s -DFILE=%t4 --check-prefixes=BROKENLINK,BROKENLINK-LLVM --implicit-check-not=warning:
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# BROKENLINK: warning: '[[FILE]]': unable to get the associated symbol table for SHT_SYMTAB_SHNDX section with index 5: sh_link (255) is greater than or equal to the total number of sections (12)
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# BROKENLINK-GNU: warning: '[[FILE]]': found an extended symbol index (1), but unable to locate the extended symbol index table
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# BROKENLINK-GNU-NEXT: 1: 00000000 0 NOTYPE LOCAL DEFAULT RSV[0xffff] sym1
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# BROKENLINK-GNU-NEXT: warning: '[[FILE]]': found an extended symbol index (2), but unable to locate the extended symbol index table
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# BROKENLINK-GNU-NEXT: 2: 00000000 0 NOTYPE LOCAL DEFAULT RSV[0xffff] sym2
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# BROKENLINK-LLVM: Symbol {
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# BROKENLINK-LLVM: Name: sym1 (6)
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# BROKENLINK-LLVM: warning: '[[FILE]]': found an extended symbol index (1), but unable to locate the extended symbol index table
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# BROKENLINK-LLVM-NEXT: Section: Reserved (0xFFFF)
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# BROKENLINK-LLVM-NEXT: }
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# BROKENLINK-LLVM-NEXT: Symbol {
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# BROKENLINK-LLVM-NEXT: Name: sym2 (1)
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# BROKENLINK-LLVM: warning: '[[FILE]]': found an extended symbol index (2), but unable to locate the extended symbol index table
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# BROKENLINK-LLVM-NEXT: Section: Reserved (0xFFFF)
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# BROKENLINK-LLVM-NEXT: }
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## Check we report a warning when multiple SHT_SYMTAB_SHNDX sections are linked to a symbol table.
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## In this case, 2 sections are linked to the dynamic symbol table. Check it doesn't affect
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## anything, because the SHT_SYMTAB_SHNDX section specified by the DT_SYMTAB_SHNDX tag is still used.
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# RUN: yaml2obj --docnum=1 -DSHNDXLINK=.dynsym %s -o %t.multiple
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# RUN: llvm-readelf --symbols --dyn-syms %t.multiple 2>&1 | \
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# RUN: FileCheck %s -DFILE=%t.multiple --check-prefix=MULTIPLE-GNU
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# RUN: llvm-readobj --symbols --dyn-syms %t.multiple 2>&1 | \
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# RUN: FileCheck %s -DFILE=%t.multiple --check-prefix=MULTIPLE-LLVM
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# MULTIPLE-GNU: warning: '[[FILE]]': multiple SHT_SYMTAB_SHNDX sections are linked to SHT_SYMTAB_SHNDX section with index 6
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# MULTIPLE-GNU: Symbol table '.dynsym' contains 3 entries:
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# MULTIPLE-GNU-NEXT: Num: Value Size Type Bind Vis Ndx Name
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# MULTIPLE-GNU-NEXT: 0: 00000000 0 NOTYPE LOCAL DEFAULT UND
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# MULTIPLE-GNU-NEXT: 1: 00000000 0 NOTYPE LOCAL DEFAULT 3 dynsym1
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# MULTIPLE-GNU-NEXT: 2: 00000000 0 NOTYPE LOCAL DEFAULT 2 dynsym2
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# MULTIPLE-LLVM: Symbol {
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# MULTIPLE-LLVM: Name: dynsym1 (9)
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# MULTIPLE-LLVM-NEXT: Value: 0x0
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# MULTIPLE-LLVM-NEXT: Size: 0
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# MULTIPLE-LLVM-NEXT: Binding: Local (0x0)
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# MULTIPLE-LLVM-NEXT: Type: None (0x0)
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# MULTIPLE-LLVM-NEXT: Other: 0
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# MULTIPLE-LLVM-NEXT: Section: .section3 (0x3)
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# MULTIPLE-LLVM-NEXT: }
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# MULTIPLE-LLVM-NEXT: Symbol {
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# MULTIPLE-LLVM-NEXT: Name: dynsym2 (1)
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# MULTIPLE-LLVM-NEXT: Value: 0x0
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# MULTIPLE-LLVM-NEXT: Size: 0
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# MULTIPLE-LLVM-NEXT: Binding: Local (0x0)
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# MULTIPLE-LLVM-NEXT: Type: None (0x0)
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# MULTIPLE-LLVM-NEXT: Other: 0
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# MULTIPLE-LLVM-NEXT: Section: .section2 (0x2)
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# MULTIPLE-LLVM-NEXT: }
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## In this case we have a SHT_SYMTAB_SHNDX section placed right before
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## the end of the file. This table is broken: it contains fewer entries than
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## the number of dynamic symbols.
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## Check we report a warning when trying to read an extended symbol index past
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## the end of the file.
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# RUN: yaml2obj --docnum=2 %s -o %t.pastend
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# RUN: llvm-readelf --dyn-syms %t.pastend 2>&1 | \
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# RUN: FileCheck %s -DFILE=%t.pastend --check-prefix=PASTEND-GNU --implicit-check-not=warning:
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# RUN: llvm-readobj --dyn-syms %t.pastend 2>&1 | \
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# RUN: FileCheck %s -DFILE=%t.pastend --check-prefix=PASTEND-LLVM --implicit-check-not=warning:
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# PASTEND-GNU: 1: 00000000 0 NOTYPE LOCAL DEFAULT 1 dynsym1
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# PASTEND-GNU-NEXT: warning: '[[FILE]]': unable to read an extended symbol table at index 2: can't read past the end of the file
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# PASTEND-GNU-NEXT: 2: 00000000 0 NOTYPE LOCAL DEFAULT RSV[0xffff] dynsym2
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# PASTEND-LLVM: Symbol {
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# PASTEND-LLVM: Name: dynsym2 (1)
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# PASTEND-LLVM-NEXT: Value: 0x0
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# PASTEND-LLVM-NEXT: Size: 0
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# PASTEND-LLVM-NEXT: Binding: Local (0x0)
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# PASTEND-LLVM-NEXT: Type: None (0x0)
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# PASTEND-LLVM-NEXT: Other: 0
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# PASTEND-LLVM-NEXT: warning: '[[FILE]]': unable to read an extended symbol table at index 2: can't read past the end of the file
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# PASTEND-LLVM-NEXT: Section: Reserved (0xFFFF)
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# PASTEND-LLVM-NEXT: }
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--- !ELF
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FileHeader:
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Class: ELFCLASS32
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Data: ELFDATA2LSB
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Type: ET_REL
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Sections:
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- Name: .section1
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Type: SHT_PROGBITS
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- Name: .section2
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Type: SHT_PROGBITS
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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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Offset: 0x1000
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Entries:
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- Tag: DT_SYMTAB
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Value: 0x1500
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- Tag: DT_HASH
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Value: 0x1600
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- Tag: DT_STRTAB
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Value: 0x1700
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- Tag: DT_STRSZ
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Value: 17 ## ".dynsym1.dynsym2."
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- Tag: DT_SYMTAB_SHNDX
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Value: 0x2000
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- Tag: DT_NULL
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Value: 0
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- Name: .dynsym
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Type: SHT_DYNSYM
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Flags: [ SHF_ALLOC ]
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Offset: 0x1500
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Address: 0x1500
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## We need the .hash table to infer the number
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## of dynamic symbols.
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- Name: .hash
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Type: SHT_HASH
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Flags: [ SHF_ALLOC ]
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Offset: 0x1600
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Address: 0x1600
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Bucket: [ 1 ]
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Chain: [ 1, 2, 3 ]
|
||
|
|
- Name: .dynstr
|
||
|
|
Type: SHT_STRTAB
|
||
|
|
Flags: [ SHF_ALLOC ]
|
||
|
|
Offset: 0x1700
|
||
|
|
Address: 0x1700
|
||
|
|
- Name: .strtab
|
||
|
|
Type: SHT_STRTAB
|
||
|
|
- Name: .symtab_shndx
|
||
|
|
Type: SHT_SYMTAB_SHNDX
|
||
|
|
Flags: [ SHF_ALLOC ]
|
||
|
|
Entries: [ 0, 1 ]
|
||
|
|
Offset: 0x2000
|
||
|
|
Address: 0x2000
|
||
|
|
- Type: SectionHeaderTable
|
||
|
|
NoHeaders: true
|
||
|
|
DynamicSymbols:
|
||
|
|
- Name: dynsym1
|
||
|
|
Index: SHN_XINDEX
|
||
|
|
- Name: dynsym2
|
||
|
|
Index: SHN_XINDEX
|
||
|
|
ProgramHeaders:
|
||
|
|
- Type: PT_LOAD
|
||
|
|
VAddr: 0x1000
|
||
|
|
FirstSec: .dynamic
|
||
|
|
LastSec: .symtab_shndx
|
||
|
|
- Type: PT_DYNAMIC
|
||
|
|
VAddr: 0x1000
|
||
|
|
FirstSec: .dynamic
|
||
|
|
LastSec: .dynamic
|