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