| Issue |
132216
|
| Summary |
llvm-readelf fails to report > 65535 segments
|
| Labels |
llvm:binary-utilities
|
| Assignees |
|
| Reporter |
emaste
|
From FreeBSD bug [285547](https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285547) a regression test started failing after we switched to LLVM's binutils replacements.
The test creates an ELF core file with more than 65535 segments ([test source code](https://github.com/freebsd/freebsd-src/blob/main/tests/sys/kern/coredump_phnum_helper.c)). llvm-readelf reports 65535 program headers.
GNU readelf:
```
$ /usr/local/bin/readelf -h ./coredump_phnum_help.core
ELF Header:
Magic: 7f 45 4c 46 02 01 01 09 00 00 00 00 00 00 00 00
Class: ELF64
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: UNIX - FreeBSD
ABI Version: 0
Type: CORE (Core file)
Machine: Advanced Micro Devices X86-64
Version: 0x1
Entry point address: 0x0
Start of program headers: 64 (bytes into file)
Start of section headers: 3726864 (bytes into file)
Flags: 0x0
Size of this header: 64 (bytes)
Size of program headers: 56 (bytes)
Number of program headers: 65535 (66550)
Size of section headers: 64 (bytes)
Number of section headers: 1
Section header string table index: 0
```
llvm-readelf:
```
$ readelf -h ./coredump_phnum_help.core
ELF Header:
Magic: 7f 45 4c 46 02 01 01 09 00 00 00 00 00 00 00 00
Class: ELF64
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: UNIX - FreeBSD
ABI Version: 0
Type: CORE (Core file)
Machine: Advanced Micro Devices X86-64
Version: 0x1
Entry point address: 0x0
Start of program headers: 64 (bytes into file)
Start of section headers: 3726864 (bytes into file)
Flags: 0x0
Size of this header: 64 (bytes)
Size of program headers: 56 (bytes)
Number of program headers: 65535
Size of section headers: 64 (bytes)
Number of section headers: 1
Section header string table index: 0
```
Support added to FreeBSD's copy of ELF Tool Chain: https://github.com/freebsd/freebsd-src/commit/714935be5a0448c889ae3a3dcf261ea2a7edece3
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