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| author | Fangrui Song <maskray@google.com> | 2022-09-26 19:50:13 -0700 |
|---|---|---|
| committer | Fangrui Song <i@maskray.me> | 2022-09-26 19:50:13 -0700 |
| commit | 2cac01e3ffff74898c54fa5e6418817f5578adb6 (patch) | |
| tree | c0209ba03d922dae339056488493fc16ebefe6d0 /ld/emultempl | |
| parent | e122316b7ce78b999db944d7b524e11d642e2a49 (diff) | |
| download | gdb-2cac01e3ffff74898c54fa5e6418817f5578adb6.zip gdb-2cac01e3ffff74898c54fa5e6418817f5578adb6.tar.gz gdb-2cac01e3ffff74898c54fa5e6418817f5578adb6.tar.bz2 | |
binutils, gdb: support zstd compressed debug sections
PR29397 PR29563: Add new configure option --with-zstd which defaults to
auto. If pkgconfig/libzstd.pc is found, define HAVE_ZSTD and support
zstd compressed debug sections for most tools.
* bfd: for addr2line, objdump --dwarf, gdb, etc
* gas: support --compress-debug-sections=zstd
* ld: support ELFCOMPRESS_ZSTD input and --compress-debug-sections=zstd
* objcopy: support ELFCOMPRESS_ZSTD input for
--decompress-debug-sections and --compress-debug-sections=zstd
* gdb: support ELFCOMPRESS_ZSTD input. The bfd change references zstd
symbols, so gdb has to link against -lzstd in this patch.
If zstd is not supported, ELFCOMPRESS_ZSTD input triggers an error. We
can avoid HAVE_ZSTD if binutils-gdb imports zstd/ like zlib/, but this
is too heavyweight, so don't do it for now.
```
% ld/ld-new a.o
ld/ld-new: a.o: section .debug_abbrev is compressed with zstd, but BFD is not built with zstd support
...
% ld/ld-new a.o --compress-debug-sections=zstd
ld/ld-new: --compress-debug-sections=zstd: ld is not built with zstd support
% binutils/objcopy --compress-debug-sections=zstd a.o b.o
binutils/objcopy: --compress-debug-sections=zstd: binutils is not built with zstd support
% binutils/objcopy b.o --decompress-debug-sections
binutils/objcopy: zstd.o: section .debug_abbrev is compressed with zstd, but BFD is not built with zstd support
...
```
Diffstat (limited to 'ld/emultempl')
| -rw-r--r-- | ld/emultempl/elf.em | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/ld/emultempl/elf.em b/ld/emultempl/elf.em index c52484f..acd66f9 100644 --- a/ld/emultempl/elf.em +++ b/ld/emultempl/elf.em @@ -668,6 +668,15 @@ gld${EMULATION_NAME}_handle_option (int optc) link_info.compress_debug = COMPRESS_DEBUG_GNU_ZLIB; else if (strcasecmp (optarg, "zlib-gabi") == 0) link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB; + else if (strcasecmp (optarg, "zstd") == 0) + { +#ifdef HAVE_ZSTD + link_info.compress_debug = COMPRESS_DEBUG_ZSTD; +#else + einfo (_ ("%F%P: --compress-debug-sections=zstd: ld is not built " + "with zstd support\n")); +#endif + } else einfo (_("%F%P: invalid --compress-debug-sections option: \`%s'\n"), optarg); |