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File mold.changes of Package mold
------------------------------------------------------------------- Fri Oct 4 18:37:30 UTC 2024 - Martin Liška <martin.liska@hey.com> - Update to version 2.34.1 * [ARM32] Fixed a regression that R_ARM_TARGET1 wasn't handled as a synonym for R_ARM_ABS32 relocation. This issue caused some ARM32 programs to crash on startup if linked with mold. (186272a) * [RISC-V] mold now sets the STO_RISCV_VARIANT_CC dynamic tag if the ELF module exports a function symbol with a non-standard calling convention. (16eb513) ------------------------------------------------------------------- Wed Sep 25 14:21:13 UTC 2024 - Martin Liška <martin.liska@hey.com> - Update to version 2.34.0 * [ARM32] mold now deduplicates exception handling records in a .ARM.exidx section to reduce the size of the table. (742ea87) * [LoongArch] TLSDESC relocations are now supported. (dbaa6d7) * --build-id=fast is now supported for compatibility with LLVM lld. mold handles it as a synonym for --build-id=sha256. (afc52ee) * Previously, if the same symbol was provided both by a static archive and dynamic library, and if the symbol's visibility was hidden, mold sometimes failed to link it and handled the symbol as if it were undefined. Now, mold can correctly link such programs. (1efbe3f) * Under rare circumstances, mold could create corrupted binaries if they were linked with --retain-symbols-file. This bug has been fixed. (0ee12e4) * [LoongArch] R_LARCH_CALL36 relocation with a large offset is now correctly written. (1c32102) * [FreeBSD] If all thread-local variables in a program have no initial values, mold-produced executables could crash or misbehave on FreeBSD. This bug has been fixed. (f6822fb) * DEC Alpha support has been removed due to lack of demand. In fact, mold's Alpha support has never been tested for real-world programs and was likely unable to link them in the first place. This should not affect anyone because the last Alpha processor was released more than 20 years ago. (3711ddb) ------------------------------------------------------------------- Wed Aug 7 06:37:53 UTC 2024 - Martin Liška <martin.liska@hey.com> - Update to version 2.33.0 * mold gained a new linker flag --separate-debug-info to bundle debug info sections into a separate file instead of putting them into a main output file. You can optionally specify a filename in the form of --separate-debug-info=<filename>. By default, a debug info file is created in the same directory as the main output file with the .dbg extension. mold embeds the debug file's filename into the main output file so that gdb can automatically follow the link to find debug info when debugging the main output file. * The main objective of this flag is to speed up the mold linker even more. By default, mold creates a separate debug file in the background after creating a main output file, so that you can start running the executable as soon as possible while mold is still working on linking its debug info sections. For example, linking clang with debug info normally takes ~1.70s on a Threadripper 7980X machine, while it takes only ~0.52s with --separate-debug-info. Shaving off a full second in quick edit-rebuild-run cycles should improve programmers' productivity. If you do not want mold to work in the background, pass the --no-detach option. (596ffa9) * mold now supports the --no-allow-shlib-undefined flag. If the option is given, mold checks if all undefined symbols are resolved not only for input object files but also for shared libraries passed to the linker. To use the feature, you need to pass all shared libraries, including transitively dependent ones, to the linker so that the linker can resolve all symbols that are available at runtime. (3001f02) * mold gained the --dynamic-list-data flag for the sake of compatibility with GNU ld. If the flag is given, all data symbols are exported as dynamic symbols. (dd8d971) * [x86-64] -z x86-64-v2, -z x86-64-v3, -z x86-64-v4 flags are supported. (5606087) * [x86-64] Recent x86-64 processors support Intel CET to protect control flow integrity. When the feature is enabled, the instruction that is executed immediately after an indirect branch must be endbr64 or a CPU fault will raise. In other words, it restricts the locations where the control can transfer to with indirect branches. Doing that makes ROP attacks harder to conduct. * A problem with that is the compiler needs to conservatively emit an endbr64 at the beginning of each global function because the compiler doesn't know whether or not the function's address is taken in other translation units. As a result, the resulting binary contains more endbr64s than necessary, weakening the protection. * mold supports the -z rewrite-endbr option to conduct a whole program analysis and rewrite endbr64 with nop if a function's address is not actually taken within the program. Previously, mold didn't take section symbols into account when conducting the analysis, which resulted in culling some endbr64s that must not be removed. Now, the bug has been fixed. We confirmed that mold can build itself with -z rewrite-endbr, and the resulting mold executable works fine with Intel CET. (ed7eec5) * mold now creates a .eh_frame section even if it's empty. (14a4b05) * [LoongArch] The following relocations are now supported: R_LARCH_TLS_LE_HI20_R, R_LARCH_TLS_LE_ADD_R, R_LARCH_TLS_LE_LO12_R, R_LARCH_CALL36, R_LARCH_RELAX (36e5b4b, 98a7cff, 2c6f379) * [LoongArch] Some relaxations that reduce the section size are now supported. (74b359f, 121f917) * [LoongArch] Range extension thunk support has been removed in favor of R_LARCH_CALL36 relocations. (47c092a) ------------------------------------------------------------------- Thu Jun 27 06:56:15 UTC 2024 - Martin Liška <martin.liska@hey.com> - Update to version 2.32.1 * Previously, shared libraries specified with --as-needed were not considered as "needed" if they were referenced only by weak undefined symbols. Such weak symbols were converted to absolute symbols at address zero at link-time. Although this behavior was not technically wrong, it caused a significant issue in a rare occasion (#1286). Now, weak undefined symbols retain --as-needed shared libraries. (06b5926) * [RISC-V] RISC-V object files contain ISA strings in the .riscv.attributes section. Previously, we had reported valid ISA strings containing digits as errors. The issue has now been resolved. (841a186) * [RISC-V] We no longer write dynamic relocation addends to relocated places because it caused static position-independent executables to crash on process startup in some environments. In other words, --no-apply-dynamic-relocs is enabled by default. * LTO now works on MinGW. (50bf031) ------------------------------------------------------------------- Sun Jun 9 10:41:50 UTC 2024 - Martin Liška <martin.liska@hey.com> - Update to version 2.32.0 * mold supports a feature called Identical Code Folding, or ICF. As the name suggests, ICF finds identical functions and merges them to reduce the size of an output file. This is especially effective for template-heavy C++ programs since templates tend to be instantiated to the same machine code for different types. For example, std::vector<int> is likely to be instantiated to the same code as std::vector<unsigned>. We've made an improvement to our ICF algorithm so that the --icf feature is ~50% faster than the previous version. (fa8e95a) * The -z rodynamic option is now supported for compatibility with LLVM lld. With the option, mold places the .dynamic section into a read-only segment. (9a233df) * Previously, mold behaved differently compared to other linkers if both -z defs and --undefined=ignore-in-object-files were given (#1270). Now, they override each other so that the mold's behavior is compatible with others. (8cd85aa) * Previously, --dependency-file mistakenly recorded response files as dependencies (#1258). This bug has been fixed. (4281f45) * There was a bug that mold corrupted debug info section contents when the --relocatable option was given (#1265). This issue has been fixed. (08b0a16) * [PPC64] The R_PPC64_TPREL16_LO_DS relocation type is supported. (a8cd2e8) * [ARM64, PPC64, LoongArch] mold 2.31.0 or earlier may have failed with an assertion failure when creating a large output file (#1224). This issue has been resolved. (c7c8583) ------------------------------------------------------------------- Fri May 3 05:46:37 UTC 2024 - Martin Liška <martin.liska@hey.com> - Update to version 2.31.0 * mold is now up to 10% faster when linking very large, debug info-enabled executables such as Blender (~1.8 GiB) or Clang (~3.8 GiB), thanks to several improvements we've made to the string merging algorithm. (53ebcd8, d714301, 40f6b17, c9faf3d) * -z start-stop-visibility=hidden is now supported so that linker-synthesized __start_<section-name> and __stop_<section-name> symbols can be completely hidden from other ELF modules. Previously, only -z start-stop-visibility=protected was supported. (99a5b15) * -Bsymbolic-non-weak and -Bsymbolic-non-weak-functions options are now supported for compatibility with LLVM lld. Just like lld, these options control which symbols are exported as dynamic symbols. -Bsymbolic-non-weak makes the linker to export only weak symbols, whereas -Bsymbolic-non-weak-functions makes it to export only weak function symbols. (7d17aa8) * Previously, if a linker script contains a newline character in the beginning four bytes of a file, it was not recognized as a linker script by mold. Now, mold allows newlines at the beginning of a file. (ea054cc) * Under rare circumstances, the INPUT linker script command may have found a different file than GNU ld would. Now, mold's behavior aligns with GNU ld's. (163975d) * Previously, the --repro option produced corrupted tar files. Now the bug has been fixed. (32c4a09) * mold generally guarantees that its output is reproducible, meaning that if you run the linker with the exact same command line options and input files, the output is guaranteed to be bit-for-bit identical to the previous outputs. However, under rare circumstances, it might produce different output due to a bug. It's reported that this nondeterminism caused random crashes for some programs (#1247). This bug has been fixed. (6463a7c) * mold no longer sets the address of the .text section as the entry point address if --entry option is not given, just like LLVM lld. (020b1a7) * [RISC-V] __global_pointer$ symbol is now exported from executables as required by the processor-specific ABI. (3df7c8e) * [ARM32] --long-plt option is now recognized as known option by mold. mold ignores the option, though, because the PLTs generated by our linker is always long. (d432e98) ------------------------------------------------------------------- Sun Mar 17 05:42:45 UTC 2024 - Martin Liška <martin.liska@hey.com> - Update to version 2.30.0 * We have increased the version number from 2.4.1 to 2.30.0, even though this release contains only minor bug fixes. This change was made to prevent GNU libtool from mistaking mold 2.4.1 for GNU ld 2.4.1, which led it to incorrectly conclude that our linker was an outdated version of the GNU linker. Bumping up the version number to align with GNU ld may not be the most elegant solution, but it is a practical approach to resolve the compatibility issue with GNU libtool. (c7f6a91) * Previously, mold may have inserted an unnecessary gap before the .bss section in an output file, thereby creating an extra segment for it. While not technically incorrect, it was certainly unnecessary. mold 2.30.0 eliminates this unnecessary on-disk gap for .bss. (c395da1) * Previously, under rare circumstances, mold might fail with the "ConcurrentMap is full" error message if --gdb-index was used. This bug has been resolved. (c60d1d0) * Previously, mold might generate an excessive number of "ignoring .llvm_addrsig section without sh_link" warnings. These warnings are now suppressed. (51f871f) * Sections with unknown section types are now reported as errors. (d21207c) * [PPC32] A crash bug related to --gc-sections has been fixed. (8eae0a3) ------------------------------------------------------------------- Fri Mar 1 16:17:35 UTC 2024 - Martin Liška <martin.liska@hey.com> - Align path for document installation between openSUSE versions. ------------------------------------------------------------------- Fri Mar 1 14:47:15 UTC 2024 - Martin Liška <martin.liska@hey.com> - Update to version 2.4.1 * mold 2.4.0 or prior may promote weak dynamic symbols to strong ones under a rare circumstance, which caused "undefined symbol" error at runtime. The bug has been fixed. (50bdf39) * Previously, if two or more VERSION clauses in a version script match to the same symbol, the first one took precedence. This was incompatible with GNU ld, which gives the last one the highest priority, causing a Qt library link failure. This compatibility issue has been resolved. (e1e16bf) * By default, we demangle symbols in error messages so that they are easier to read. Previously, Rust symbols could accidentally be demangled as C++ symbols. Now, mold attempts to demangle symbols as Rust ones only for object files created by rustc. (ea9864b) * [RISC-V] mold now relaxes a GOT-load instruction sequence into a direct address materialization if the symbol address is known at link time. This relaxation eliminates one memory load and slightly improves the linked program's performance. (2ccaa81) * [PowerPC64 ELFv2] GCC may emit references to _savegpr0_*, _restgpr0_*, _savegpr1_* and _restgpr1_* symbols for the -Os command line option to optimize the output for code size. These symbols are not defined by any object file and expected to be synthesized by the linker. mold didn't use to synthesize these symbols, and therefore object files created with -Os sometimes failed due to missing symbol errors. Now, mold synthesizes these symbols. (d4ff48a) * [PowerPC64] R_PPC64_DTPREL16_LO_DS relocation type has now been supported. (6d8e6af) * [Illumos] On Illumos OS, absolute symbols in DSOs need to be resolved at runtime because the dynamic linker treats such symbols in a special manner. Previously, mold directly used absolute symbol addresses at link-time and did not place them into the dynamic symbol table. That optimization has been removed for compatibility with Illumos. (bed5b17, 7f8d77d) ------------------------------------------------------------------- Thu Nov 30 05:33:24 UTC 2023 - Martin Liška <martin.liska@hey.com> - Update to version 2.4.0 * mold gained the --spare-program-headers=<number> option, which adds a specified number of spare entries at the end of the program header. The option aims to make post-processing tools to add program header entries very easily. Note that sorting program header entries after adding new ones may be necessary to meet the constraints of the ELF file format. For details, see the elf(5) man page. (eb6c213) * mold's -z rewrite-endbr option rewrites superflous endbr64 instructions with nop as a countermeasure against control-flow highjacking attacks. Previously, this worked exclusively with object files compiled with -ffunction-sections, requiring each function to be compiled into a separate section. Starting from this release, -z rewrite-endbr works on object files compiled without it. In other words, mold is now capable of rewriting endbr64 instructions even if the instruction is not at the beginning of a section. (3cb8a52) * Previously, mold couldn't handle object files containing multiple .eh_frame sections. The .eh_frame is a section containing data for exception handling. Usually, an object file contains only one .eh_frame which describes how to handle exceptions for all text sections in the same file. However, on rare conditions, it seems ld -r creates an object file containing multiple .eh_frame sections. mold is now able to handle such object files. (f4c5a8a) * mold -run <command> is an easy way to run the given command with a virtual environment in which the ld command is replaced with mold. The feature is implemented using LD_PRELOAD to hook fork(2)-family functions. Before this release, some invocations of ld were not intercepted correctly because we missed the posix_spawnp(2) function. Now, the function is intercepted just like other fork(2)-family functions. (3fd1cec) * mold used to produce a non-working executable on a rare occasion when all thread-local variables lacked an initial value and the read-only data required alignment equal to or greater than the page size. This bug has been resolved. (de7d37e) * Previously, mold might assign a different symbol version to a symbol compared to GNU ld if it matches both a wildcard pattern and an exact pattern in a version script. Our behavior is now compatible with that of GNU ld. (0fdbace) * [x86-64, i686] Recent versions of LLVM emit a machine code sequence for TLSDESC thread-local variables that differs from GCC's, and mold previously mis-optimized this sequence, leading to crashes in the linked programs. In other words, if you are using LLVM/Clang and compile object files with -mtls-dialect=gnu2, mold might mis-optimize the output file. Now, the bug has been fixed. (000ce0e) ------------------------------------------------------------------- Tue Nov 14 14:57:48 UTC 2023 - Martin Liška <martin.liska@hey.com> - Update to version 2.3.3 * --dynamic-list has different semantics for executables and DSOs. Previously, mold implemented only the semantics for executables, causing issues with libraries such as musl that used this option. mold now handles the option for DSOs correctly. (da3f5dd) * Old object files often contain .ctors and .dtors sections, which hold function pointers for initializing and finalizing processes, respectively. Their roles have been superseded by .init_array and .fini_array on most targets. mold worked functioned correctly as long as input object files consistently use the old or the new sections. However, mixing object files that contain both types of initializers/finalizers resulted in some functions not being executed. This issue has been fixed. (3f88964) * --defsym can cause the linker to crash if a given symbol is not defined. The crash bug has been fixed. (ff3d54d) * [POWER10] On rare occasions, pointers statically initialized to functions could be left as null pointers. This bug has been fixed. (31c3b53) - Remove upstreamed patch power10-fix.patch. ------------------------------------------------------------------- Mon Nov 6 18:20:07 UTC 2023 - Martin Liška <martin.liska@hey.com> - Add power10 fix power10-fix.patch for #1142. ------------------------------------------------------------------- Sun Nov 5 06:53:29 UTC 2023 - Martin Liška <martin.liska@hey.com> - Update to version 2.3.2 * Remove upstream patch fix-arm.patch. * mold no longer emits dynamic relocations against the text segment for GNU ifunc symbols. Previously, mold emitted such relocations for position-dependent executables. (4cdfc7e) * mold no longer reports the "REL-type relocation table is not supported for this target" error and instead ignore incompatible relocation tables. LLVM generates such non-conforming relocation tables for the .llvm.call-graph-profile section. This change was made for compatibility. (3791900) * mold now pads unused gaps in the text segment with interrupt or NOP instructions, instead of leaving them filled with zeros. This alteration does not change the program's semantics but prevents disassemblers from interpreting the spaces between functions as valid instructions. (c86a59a) * mold now creates the .mold-lock file for MOLD_JOBS not in the home directory but in $XDG_RUNTIME_DIR, which is usually /var/user/<uid>. (39cdf61) * [ARM32] There was an issue preventing mold from being built on an ARMv8 64-bit ARM processor with an ARM32 userland, such as the 32-bit Raspberry Pi OS running on a Raspberry Pi 4. This build issue has been resolved. (02ead29) * [LoongArch] mold can now handle R_LARCH_PCALA_LO12 relocation for the jirl instruction. (d3188e3) ------------------------------------------------------------------- Wed Oct 25 13:02:13 UTC 2023 - Martin Liška <martin.liska@hey.com> - Add fix-arm.patch in order to fix failing arm-arm_range-extension-thunk2 test. ------------------------------------------------------------------- Fri Oct 20 08:21:20 UTC 2023 - Martin Liška <martin.liska@hey.com> - Update to version 2.3.1 * [ARM32, ARM64, PowerPC, LoongArch] mold 2.3.0 would crash when handling large output files. This was due to a bug in the code that creates range extension thunks. This issue has now been resolved. (7be1b66) * [LoongArch] mold is now capable of handling relocations generated for the -mcmodel=extreme flag. (4bd80ec) ------------------------------------------------------------------- Wed Oct 18 12:34:13 UTC 2023 - Martin Liska <martin.liska@melowntech.com> - Update to version 2.3.0 * [x86-64] mold 2.3.0 has introduced an experimental flag, -z rewrite-endbr, which rewrites superfluous endbr64 instructions as nop. * endbr64 is a relatively recent x86 instruction used to mark locations where an indirect jump instruction can transfer control. With control-flow integrity enabled (meaning endbr64 is effective), an indirect jump can only target an endbr64 or it will trigger a runtime exception. This mechanism significantly hinders certain control hijacking attacks, such as ROP or JOP, since attackers cannot jump to just any location. * When given the -fcf-protection flag, GCC conservatively places an endbr64 at the beginning of every global function. This is because the function's address might be taken as a pointer by other translation units. However, in most cases, function addresses are not actually taken. This conservative approach results in an overabundance of unnecessary endbr64 instructions, leading to not only code bloating but also a potential decrease in security as there are more locations for an attacker to exploit. * The new linker option, -z rewrite-endbr, aims to alleviate this issue. The linker can carry out a whole-program analysis on the input files to identify functions whose addresses are never taken. If -z rewrite-endbr is specified, mold will conduct this analysis and replace the initial endbr64 with a nop for functions whose addresses aren't taken. (17f0d85) * mold now produces a more compact .gdb_index section when using the --gdb-index flag. Additionally, mold now generates a correct .gdb_index section for object files created by Clang. (a396fa4) * mold is now capable of handling input sections larger than 4 GiB. (0ce32d3) * [PPC] mold can now generate executables for POWER10 processors. Previously, executables produced by mold would crash immediately on startup on POWER10. (0f71471) * [ARM64] When a function with a non-standard calling convention is exported, it's mandatory for the linker to turn on the STO_AARCH64_VARIANT_PCS flag to notify the dynamic linker. mold now appropriately sets this flag. (2e3b56e) * [RISC-V] mold now supports new GP-relative relocations. (ac3ee91) ------------------------------------------------------------------- Tue Sep 26 20:11:13 UTC 2023 - Martin Liška <martin.liska@hey.com> - Add build-blake-3-as-static.patch that builts BLAKE 3 support as static library into mold. The library is not provided in openSUSE yet. ------------------------------------------------------------------- Sun Sep 24 17:50:53 UTC 2023 - Martin Liška <martin.liska@hey.com> - Update to version 2.2.0 * We now use BLAKE3 as a cryptographic hash function instead of SHA256. This change has made --build-id a few percent faster. libssl is no longer a build dependency. (7f7a744) * mold is now a few percent faster than the previous version due to an optimization of string merging code path. (1a13c50) * mold now emits slightly optimized code for thread-local variable accesses. (f057fda, d56f528) * [RISC-V] mold now supports TLSDESC relocations. TLSDESC is a new mechanism for faster thread-local variable access. We (@ishitatsuyuki) actually led the effort to ratify the specification (riscv-non-isa/riscv-elf-psabi-doc#373) and implement it to compiler toolchain including GCC, GNU binutils and, of course, mold. (141556d) * mold no longer marks an as-needed .so as "needed" if the .so file is not directly used by the output file. Previously, mold marked a .so file as "needed" if the .so file was used by another "needed" .so file. (f02db0f) * [PPC64] --execute-only now works on 64-bit PowerPC. (ac20d87, 51fec5f) - Remove openssl dependency. ------------------------------------------------------------------- Sun Aug 13 19:37:35 UTC 2023 - Martin Liška <martin.liska@hey.com> - Update to version 2.1.0 * Loongson's LoongArch CPU has been supported. (03b1a1c) * -z nosectionheader has been added to eliminate section headers from the output file. (084ca55) * Previously, linking with the -z pack-relative-relocs option produces an executable that glibc 2.38 refuses to run with DT_RELR without GLIBC_ABI_DT_RELR dependency error. Now, mold produces binaries compatible with glibc 2.38. (f467ad1) * [ARM64] R_AARCH64_ADR_PREL_PG_HI21_NC relocation type has been supported. (17a5c3e) * [ARM64] R_AARCH64_MOVW_UABS_G3 relocation type has now been handled as a PLT-generating relocation to fix an issue when main is not defined in the main executable but rather in a .so file. (e764557) * [RISC-V] We now merge input .riscv.attributes contents. Previously, we just concatenated them. (aa64491) ------------------------------------------------------------------- Wed Jul 26 13:07:20 UTC 2023 - Martin Liška <martin.liska@hey.com> - Update to version 2.0.0 * License changed to MIT. * Previously, mold could not produce an object file with more than 65520 sections using the --relocatable option. Now the bug has been fixed. (2e8bd0b) * mold now interprets -undefined as a synonym for --undefined instead of -u ndefined. This seems inconsistent, as -ufoo is generally treated as -u foo (which is an alias for --undefined foo), but this is the behavior of the GNU linkers and LLVM lld, so we prioritize compatibility over consistency. * -nopie is now handled as a synonym for --no-pie. * [RISC-V] R_RISCV_SET_ULEB128 and R_RISCV_SUB_ULEB128 relocation types are now supported (4bffe26, 1ac5fe7) * [PPC64] R_PPC64_REL32 relocation type is now supported. (ebd780e) ------------------------------------------------------------------- Thu Mar 16 09:48:39 UTC 2023 - Martin Liška <mliska@suse.cz> - Update to version 1.11.0 * IBM Power10 has been supported. Previously, mold created broken executables for that target. (5065547) * --hash-style=none has been added to cancel --hash-style=sysv, --hash-style=gnu or --hash-style=both. (ec75633) * [ARM32] R_ARM_PLT32 relocation type has been supported. (e505900) * [RISC-V] R_RISCV_PLT32 relocation type has been supported. (51845ac) * Previous versions of mold failed to link some programs in rare corner cases if Link-Time Optimization (LTO) is enabled. These bugs have been fixed. (e1a7590, 62d6537) * mold used to ignore dependencies between DSOs. Since this version, if a required DSO depends on other as-needed DSO, mold keeps the latter DSO as a required one. This improves compatibility with GNU linkers. (1adde7a) * [x86-64] mold can now link object files generated by old buggy versions of GCC. (d2970e0) * [x86-64] Previously, a program with a very large .bss section may fail to link due to R_X86_64_REX_GOTPCRELX relocation overflow (#975). This bug has been fixed. (627bf7c) ------------------------------------------------------------------- Sun Jan 22 08:23:35 UTC 2023 - Martin Liška <mliska@suse.cz> - Update to version 1.10.1 * mold 1.10.0 had a buffer overrun bug that causes the linker to terminate immediately if compiled with -D_GLIBCXX_ASSERTIONS. We fixed the unsafe memory access in this release. (7e65546) ------------------------------------------------------------------- Fri Jan 20 12:19:11 UTC 2023 - Martin Liška <mliska@suse.cz> - Update to version 1.10.0 * mold now officially supports the --print-dependencies option to print out dependency information between input files. Here is a truncated example output when linking mold itself with the option. There are many use cases of the option; for example, if you want to eliminate the dependency to some library from your program, you can use this option to find out all the functions that use the library's function to fix them. (6fd47db) * [x86-64][s390x] mold now optimizes thread-local variable accesses in shared libraries if the library is linked with -z nodlopen. If your shared library is not intended to be used via dlopen(2) and your library frequently accesses thread-local variables, you might want to pass that option when linking your library. (25d02bb, f32ce33) * [arm64] mold is now able to optimize GOT load by rewriting an ADDR+LDR instruction pair with an ADDR+ADD if the loaded GOT value is known at link-time. (f2311b1) * mold 1.9.0 was up to 10% slower than 1.8.0 on some multicore machines. We fixed the performance regression and made it even faster than 1.8.0. (7132822) * Previously, mold failed to report an undefined symbol error if there's a weak undefined symbol of the same name. That bug resulted in producing a non-working executable instead of reporting a link failure. Now, mold correctly reports such link errors. (8936194) * mold 1.9.0 might crash with SIGSEGV if --emit-relocs is used with object files containing debug info. That bug has been fixed. (e17d7da) ------------------------------------------------------------------- Fri Jan 6 11:38:43 UTC 2023 - John Paul Adrian Glaubitz <adrian.glaubitz@suse.com> - Enable build on ppc now that the target is supported upstream ------------------------------------------------------------------- Fri Jan 6 09:38:06 UTC 2023 - Martin Liška <mliska@suse.cz> - Update to version 1.9.0 * mold gained support for the three new targets: 32-bit PowerPC, SH-4 and DEC Alpha. Each porting work didn't take more than a few days for us to complete, which demonstrate how portable the mold linker is. You can typically port mold to a new target just by writing a few hundreds lines of target-specific code. See arch-*.cc files in mold/elf/ directory to see how target-specific code actually looks like. (651adad, 3411e17, 6231510) * Bug fixes and compatibility improvements * In a rare occasion, a statically-initialized function pointer might get a wrong address in a statically-linked executable. This bug has been fixed. (ccd47db) * Fixed a -gdb-index option's crash bug on big-endian hosts. (3c96828) * [RISC-V] mold rewrote machine instructions in a wrong way as a result of a wrong R_RISCV_HI20 relaxation if the output file was being linked against the high address. It's not a problem for user-land programs, but kernels linked with mold could crash due to this bug. This bug has been fixed. (3c96828) ------------------------------------------------------------------- Tue Dec 27 09:47:12 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.8.0 * The --relocatable (or -r) option has been reimplemented to improve its performance and compatibility with the GNU linkers. That option tells the linker to combine input object files into another object file instead of into an executable or a shared library file. mold has been supporting the feature since version 0.9, but until now the output file created with -r looked fairly different from what GNU linkers would produce. GHC (Glasgow Haskell Compiler) in particular uses re-linkable object files as dynamic libraries instead of real .so files, and it didn't work with mold. Now, mold can produce object files that GHC can load. Note that this work was funded by Mercury, so thanks to the company to help us improve the product. (Yes, you can ask us to prioritize your feature request by funding the project.) (c9a7ae7) * --relocatable-merge-sections option has been added. By default, mold keeps original input section names for the --relocatable output and therefore does not merge input sections into a single output sections unless they are of the same name. If --relocatable-merge-sections is given, mold merges input by the usual default merging rule. For example, .text.foo and .text.bar are merged to .text if and only if --relocatable-merge-sections is given for the --relocatable output. (c2a0ae1) * -z [no]dynamic-undefined-weak options have been added. This option controls whether an undefined weak symbol is promoted to a dynamic symbol or not. (ed235f3) * --[no-]undefined-version options have been supported. Now, mold warns on a symbol name in a version script if it does not match with any defined symbol. This change was made so that it is easy to find a typo in a version script. (e2d7353) * mold now warns on symbol type mismatch. If two object files have the same symbol with different symbol types, it usually means your program has a bug. Chances are, you are using the same identifier as a function name in one translation unit and as a global variable name in another. So it makes sense to warn on the mismatch. (b70211e) * mold now merges .gnu.note.property sections for various x86 properties. (d30d743) * The experimental macOS/iOS support has been removed from mold. If you want to use it, please use our sold linker instead. * --wrap now works with LTO. (07d8911) * A global variable initialized with an IFUNC function pointer is now initialized correctly with the function's address. Previously, it was mistakenly initialized to the function resolver's address. (b2858d2) * The filename specified by --version-script or --dynamic-list is now searched from library search paths if it does not exist in the current working directory. This behavior is compatible with GNU linkers. (3c1a055, 8c87f16) * mold now tries to avoid creating copy relocations as much as possible. This change fixed a compatibility issue with GHC. (5866c9e) * Thread-local variables are now correctly aligned even if there's a TLV with a large alignment. (bd46edf) * mold can now handle GCC LTO files created with -ffat-lto-objects. (804b843) * mold now accepts -z nopack-relative-relocs as an alias for --pack-dyn-relocs=none for the sake of compatibility with GNU linkers. (b510588) * mold now recognizes -z start-stop-visibility=hidden but ignores it because it's the default for mold. GNU linkers support this option to control the visibility of linker-synthesized __start_<sectname> and __stop_<sectname> symbols, with global as the default visibility. mold creates these symbols with the hidden visibility by default, which is desirable for almost all cases. (22c9ec8) * [ARM32, i386] mold now emits REL-type relocations instead of RELA-type for the --relocatable output file. (8b373d3) ------------------------------------------------------------------- Fri Nov 18 14:08:15 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.7.1 * mold 1.7.0 may generate the same build-id for two different output files. We fixed the issue in 1.7.1 so that build-id is guaranteed to be unique for each different output file. (d8dd124) ------------------------------------------------------------------- Mon Nov 14 11:12:19 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.7.0 * [m68k] mold now supports the Motorola 68000 series microprocessors. Yes, it's the processor in the original Mac or Sun workstations in the 80s. This work is sponsored by m68k hobbyist communities. * We fixed a few issues for Facebook/Meta's BOLT optimizer (#789). Starting from the next LLVM release (we need llvm/llvm-project@20204db), BOLT should work on mold-generated executables out of the box. * We fixed a long-standing symbol resolution issue involving GNU UNIQUE symbols which caused a link failure for a few programs. (730e970) * Previously, if a version script contains a "C++" directive, and a symbol matches a non-C++ version pattern and a C++ version pattern, a wrong version could be assigned to the symbol. This has been fixed so that the mold's behavior matches with GNU ld. (9875150) ------------------------------------------------------------------- Wed Oct 19 08:20:22 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.6.0 * [ppc64] mold now supports the original 64-bit big-endian PowerPC ABI (which is also known as PPC64 ELFv1 or just ppc64), so that you can build applications for older PPC64 systems with mold. Note that this should not be confused with the modern PPC64 ELFv2 ABI (which is also known as ppc64le), which is already supported by mold. * [s390x] Linux/s390x is now supported. Linux/s390x is the Linux environment running on IBM z/Architecture mainframes. I've personally never seen a mainframe, but we wanted to support it because many Linux distros actively support that target, which in turn means there are many enterprise users who are using IBM mainframes. Speaking of the porting effort, we do not only port our linker to s390x but also found a couple of issues with the existing GCC toolchain for s390x. So, we are improving the whole IBM mainframe ecosystem! * mold now creates smaller output files. It is most noticeable on targets with large page sizes such as PPC64 (on which the common page size is 64 KiB), but even on x86-64, it should save a few kilobytes per an output file. * [arm64] mold can now link executables with -static-pie. Previously, executables linked with that flag crashed immediately. - Exclude ppc architecture as it is not supported right now. ------------------------------------------------------------------- Thu Sep 29 07:06:19 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.5.1 * We changed the memory layout to save both memory and disk space in 1.5.0. Even though the new layout works fine on most systems, the change made the linker to create unusable executables for systems with large pages. Specifically, if you specify a large number for the -z max-page-size option, the loader refused to execute it with the error while loading shared libraries: cannot apply additional memory protection after relocation: Cannot allocate memory error. We reverted our recent commits so that mold creates output files with the same memory layout as it did before 1.5.0. (e62de0b) ------------------------------------------------------------------- Tue Sep 27 07:10:17 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.5.0 * PPC64LE and SPARC64 are now supported as new targets. They haven't yet been as well tested as other targets, but they are already able to link mold itself on these platforms. (Note that PPC64LE is very unlikely to work on the most recent POWER10 machines as we didn't have a chance to test it due to a limited availability (POWER10 was released in 2021). If you can support us on this matter, please contact us. We also accept donations, so please consider supporting our project!) * RV32BE and RV64BE (32-bit and 64-bit big-endian RISC-V) are now supported as experimental targets. RISC-V is usually little-endian, but there exists a big-endian RISC-V as an extension. You can make gcc to emit code for big-endian RISC-V by passing -mbig-endian. mold can now link object files generated with that option. * --compress-debug-sections=zstd is now supported. This is an option to compress debug info embedded to an output file with Zstandard compression algorithm. Compared to the existing --compress-debug-sections=zlib, zstd is faster and gives a higher compression ratio. You probably can't start using zstd compression today though, because other tools such as gdb may not be able to read zstd-compressed debug info yet. But adding this option early makes mold future-proof. (ede7a5a) * mold no longer aligns loadable segments to page boundaries to reduce output file size. Previously, we allocated holes between loadable segments. The saving by this change is most visible for small programs. For example, a "hello world" program used to be ~18 KiB on x86-64. It's now 7.2 KiB. (2941d75) * Bug fixes and compatibility improvements * [RISCV] We optimized code so that the link speed for RISC-V is now comparable to the other targets. As an example, linking mold itself (~150 MiB in size) for RV64 used to take ~45 seconds on a simulated 16-core machine. It now takes only ~0.25 seconds. (3ab5489) * mold used to create more than one .rodata section under a certain condition. It's not technically wrong but confused Valgrind. This issue has been resolved. (25c7aee) * [ARM32] Previously, mold failed to promote remaining undefined symbols to dynamic symbols if symbols are undefined weak. That caused a link failure for libxml (#660). This issue has been resolved. (72e26d9) * mold didn't copy symbol types when creating symbol aliases for the --defsym option. (8c7f31c) * --compress-debug-sections=zlib-gnu has been removed. LLVM lld removed that option too as there seems to be no usage of the flag. - Enable ppc64le and use system zstd library as package dependency. ------------------------------------------------------------------- Sun Sep 4 06:29:52 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.4.2 * [RV32] We've fixed several issues for 32-bit RISC-V. mold can now build complex programs including itself for the target. * [ARM32] mold gained range extension thunks so that it can now link programs whose .text is larger than 16 MiB. Previously, mold couldn't link such large programs. We've also fixed general stability issues for ARM32. ------------------------------------------------------------------- Thu Aug 18 09:28:25 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.4.1 * mold/macOS is now available as an alpha feature. We do not recommend using it for anything serious though. Starting from this version, we accept not only mold/Unix issues but also mold/macOS ones on our GitHub Issues. Feel free to file a bug if you encounter any problem. * We started supporting CMake in addition to Make to build mold. Our long-term plan is to migrate from Make to CMake because we want to support Windows eventually and CMake provides a better Windows support than Make does. (e6a0e67) * There was a bug that mold accidentally exported a hidden symbol from an executable if a shared library linked to that executable happened to define the same symbol. This caused a build issue with Blender (#606). The bug has been fixed. (b163068) --hash-style=both is now the default if no --hash-style option is given. Previously, --hash-style=sysv was the default. This change shouldn't affect most users because the compiler driver (cc, gcc, clang, etc.) always passes --hash-style to the linker. We made this change because GNU ld defaults to --hash-style=both. * Alias symbols defined by the --defsym option now have the same scope as the aliased symbols. Previously, alias symbols defined by --defsym were always hidden and never be exported as dynamic symbols. (5dd1227) * mold now accepts foo = bar-style linker script directive to define symbol aliases. Previously, such statement was treated as a syntax error. This change was made to link mariadb-connector-c correctly (f0e1237) * Symbols in mergeable string sections now have correct output section indices instead of SHN_UNDEF. (a595c48) * [ARM32] Previously, calling a function from ARM code to Thumb code caused a program crash due to bug #442. This issue has been fixed. (053b90b) - Run tests in parallel. ------------------------------------------------------------------- Fri Aug 5 16:54:51 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.4.0 * Initial support for the 32-bit RISC-V (RV32) has landed. (d9db6bc) * mold now demangles Rust symbols in error messages thanks to @eddyb's rust-demangle.c. (22e1bba) * --export-dynamic-symbol and --export-dynamic-symbol-list are now supported for the sake of compatibility with LLVM lld. With these options, you can specify symbols that should be exported using glob pattern. (e115aae) * [x86-64] PLT entries created by mold now always begins with ENDBR64 instruction to improve compatibility with Intel IBT (Indirect Branch Tracking.) (e3e371d) * mold now defines __dso_handle symbol. The lack of this linker-synthesized symbol caused a link error with GCC in some environments (#507). (764d757) - Remove fix-tests.patch. ------------------------------------------------------------------- Mon Aug 1 05:35:29 UTC 2022 - Martin Liška <mliska@suse.cz> - Add fix-tests.patch which fixes tests on i586. ------------------------------------------------------------------- Fri Jul 1 09:13:58 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.3.1 * mold now supports .preinit_array sections. Without this, AddressSanitizer didn't work in some environments. (3b75398) * [ARM32] R_ARM_MOVT_PREL and R_ARM_PREL31 relocations are now handled correctly so that mold no longer emit spurious "recompile with -fPIC" errors. (5294300) ------------------------------------------------------------------- Sat Jun 18 07:10:09 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.3.0 * The --icf=safe option has been supported. * LTO now works reliably under a heavy load. mold used to abort occasionally under such condition on Linux due to a spurious failure of pthread_create(2). (d8a8877) * mold now prints out undefined symbol errors in a format similar to LLVM lld. (13816a1) * mold now prints out a better error message for the disk full situation. (5969260) * mold can now build GCC 12 with LTO. (708ad63) * Fixed an LTO issue on 32-bits hosts such as i686. (920266b) * mold is now AddressSanitizer and UndefinedSanitizer clean. (fafb75b, 3499ee6) * mold used to create broken debug info on 32-bits hosts (#490). The bug has been fixed. (0abd0a4) * mold used to accept not only a single dash but also double dashes for single-letter options. For example, --S was accidentally accepted as an alias for-S. This is unconventional, and such options are no longer accepted. (232dafa) * --color-diagnostics is now an alias for --color-diagnostics=auto instead of --color-diagnostics=always for compatibility with LLVM lld. * pkg-config is no longer needed to build mold. * The --package-metadata option is supported. (#505, e9f6715) ------------------------------------------------------------------- Fri May 13 09:31:25 UTC 2022 - Martin Liška <mliska@suse.cz> - Use better CC and TEST_CC variables. ------------------------------------------------------------------- Fri May 13 09:21:22 UTC 2022 - Martin Liška <mliska@suse.cz> - Add memory per job constraint. ------------------------------------------------------------------- Tue May 10 12:30:07 UTC 2022 - Martin Liška <mliska@suse.cz> - Do not use mimalloc, use system glibc allocator. ------------------------------------------------------------------- Thu May 5 11:17:01 UTC 2022 - Martin Liška <mliska@suse.cz> - Add valgrind as BuildRequire argument. ------------------------------------------------------------------- Thu Apr 28 12:49:30 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.2.1 * Various bugs in --gdb-index have been fixed. * mold now recognizes --thinlto-cache-dir and --thinlto-cache-policy for the sake of compatibility with LLVM lld. (7ebd071) * mold can now handle TLS common symbols. It looks like GCC sometimes creates such symbol for a thread-local variable. (cf850f8) * In some edge cases, mold created a non-versioned symbol and a versioned one for the same symbol, even though if one symbol is versioned, all symbols of the same name must be versioned. This bug has been fixed. (8298c0a) * mold used to write a PLT address of a symbol instead of its address to .symtab. This bug has been fixed. (e088db7) * mold can now handle an input file with more than 219 symbols. (f1f2d40) * /usr/local/libexec/mold/ld is now installed as a relative symlink instead of an absolute symlink. (5803c3c) - Removed upstreamed fix-gdb-index.patch patch. ------------------------------------------------------------------- Wed Apr 20 06:50:40 UTC 2022 - Martin Liška <mliska@suse.cz> - Run test serially. - Install some packages in order to increase test coverage. - Use ExclusiveArch. ------------------------------------------------------------------- Tue Apr 19 06:43:50 UTC 2022 - Martin Liška <mliska@suse.cz> - Add fix-gdb-index.patch. - Enable tests. ------------------------------------------------------------------- Fri Apr 15 11:53:51 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.2.0 * The ARM32 target is now supported. * --gdb-index is implemented. * mold now supports the following flags: --start-address, -Tbss, -Tdata, -Ttext, --oformat=binary, --disable-new-dtags ------------------------------------------------------------------- Fri Apr 8 15:40:19 UTC 2022 - Callum Farmer <gmbr3@opensuse.org> - Set LIBEXECDIR - Disable default stripping ------------------------------------------------------------------- Tue Mar 8 12:07:34 UTC 2022 - Martin Liška <mliska@suse.cz> - Respect %{optflags}. ------------------------------------------------------------------- Tue Mar 8 09:58:13 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.1.1 * Native LTO (Link-Time Optimization) support * RISC-V CPU architecture support * Optimize memory usage by reducing the sizes of frequently-allocated objects; roughly 6% redux in the maximum RSS. ------------------------------------------------------------------- Wed Feb 23 23:29:01 UTC 2022 - Christoph G <foss@grueninger.de> - Fix building for openSUSE Leap 15.3 and 15.4. ------------------------------------------------------------------- Mon Feb 21 07:51:37 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.1: https://github.com/rui314/mold/releases/tag/v1.1. ------------------------------------------------------------------- Mon Jan 31 10:24:17 UTC 2022 - Martin Liška <mliska@suse.cz> - Start using system library mimalloc. ------------------------------------------------------------------- Sun Jan 30 15:53:00 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.0.3: https://github.com/rui314/mold/releases/tag/v1.0.3. ------------------------------------------------------------------- Sun Jan 23 09:44:13 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.0.2: complete release notes can be found here: https://github.com/rui314/mold/releases/tag/v1.0.2. ------------------------------------------------------------------- Mon Jan 3 08:33:39 UTC 2022 - Martin Liška <mliska@suse.cz> - Start using %{_libexecdir} as an installation location. ------------------------------------------------------------------- Sat Jan 1 22:23:26 UTC 2022 - Christoph G <foss@grueninger.de> - Remove quotationsmarks from build_args as it prevented the use of system packages for TBB and xxHash. - Drop configure-fix.patch as xxHash is used from system package, so we don't need to patch the wrong configuration of xxHash. - Use telling name of source tarball, adjust GitHub url to have matching names. ------------------------------------------------------------------- Sat Jan 1 21:37:43 UTC 2022 - Martin Liška <mliska@suse.cz> - Update to version 1.0.1: * make install now creates /usr/local/libexec/mold/ld as a symlink to the mold executable. We do this for GCC. By passing -B/usr/local/libexec/mold, you can tell GCC to use ld inside that directory instead of /usr/bin/ld. (e8dcecf) * xxHash library is now included in the mold's source tree as a subtree for ease of building. If you want to link against a libxxhash in a system library directory, pass SYSTEM_XXHASH=1 to make. (665bffa) * The extern "C++" directive is now supported in the dynamic list. (7aa5c39) * --color-diagnostics is supported. mold used to ignore that flag. (6e290aa) * Not only * but also ? are now treated as special characters in the version script wildcard pattern. (31b0248) * The --threads=N option has been added as an alias for --thread-count=N. (f9ff048) * The following option has been added: --defsym (f6e8006), -z nodefaultlib (8c86c28), -z separate-code, -z noseparate-code and -z separate-lodable-segments (5601cf4), -z max-page-size (f3766cd) - Add workaround patch configure-fix.patch. ------------------------------------------------------------------- Tue Dec 21 17:04:56 UTC 2021 - Martin Liška <mliska@suse.cz> - Ignore -Wno-sign-compare for now. ------------------------------------------------------------------- Tue Dec 21 16:35:38 UTC 2021 - Martin Liška <mliska@suse.cz> - Use system package for tbb and xxhash. ------------------------------------------------------------------- Tue Dec 21 15:03:07 UTC 2021 - Mark Nefedov <mark_nefedov@runbox.com> - Start with version 1.0.0.
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