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* backends: Guard x86_sample_* function calls behind HAVE_X86_INITREG_SAMPLEAaron Merey2025-10-243-0/+44
| | | | | | | | Avoid "implicit declaration" compile errors on non-x86_64/i386 arches by calling x86_sample_* functions only when x86_initreg_sample.c is included in the build. Signed-off-by: Aaron Merey <[email protected]>
* libdwfl_stacktrace + libebl: dwflst_sample_getframes non-perf apiSerhei Makarov2025-10-247-192/+126
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a generic dwflst_sample_getframes() API that does not depend on perf_events concepts, in particular the linux-kernel-specific enum defining the perf_regs_mask register order. This involves reworking the register-handling backend to use regs_mapping arrays rather than perf_regs_mask, and provide a way to translate perf_regs_mask to regs_mapping. A regs_mapping array, for each item in a provided regs[] array, specifies its position in the full register file expected by the DWARF functionality. * libdwfl_stacktrace/Makefile.am: Rename dwflst_sample_frame.c from dwflst_perf_frame.c. * libdwfl_stacktrace/libdwfl_stacktrace.h (dwflst_sample_getframes): New function providing unwinding functionality with a regs_mapping array rather than a linux-kernel-dependent perf_regs_mask. * libdw/libdw.map (ELFUTILS_0.194_EXPERIMENTAL): Add dwflst_sample_getframes. * libdwfl_stacktrace/dwflst_sample_frame.c: Renamed from dwflst_perf_frame.c. Remove linux/perf_event.h dependency. (struct sample_info): Rename from perf_sample_info, include regs_mapping field, replace abi with elfclass field. (sample_next_thread): Renamed struct sample_info. (sample_getthread): Renamed struct sample_info. (copy_word): Use elfclass instead of perf abi field. (elf_memory_read): Renamed struct sample_info, use elfclass. (sample_memory_read): Renamed struct sample_info, use elfclass. (sample_set_initial_registers): Renamed struct sample_info, pass regs_mapping to ebl_set_initial_registers_sample. (dwflst_sample_getframes): New function. (dwflst_perf_sample_getframes): Reimplement in terms of dwflst_sample_getframes and ebl_sample_perf_regs_mapping. * libebl/ebl-hooks.h (set_initial_registers_sample): Now takes regs_mapping instead of regs_mask. (sample_base_addr): Removed. (sample_pc): Removed. (sample_sp_pc): New function combining the removed functions for efficiency. (sample_perf_regs_mapping): New function translating perf_regs_mask to regs_mapping array. * libebl/eblinitreg_sample.c (ebl_sample_base_addr): Removed. (ebl_sample_pc): Removed. (ebl_sample_sp_pc): New function. (ebl_set_initial_registers_sample): Take regs_mapping, provide a default implementation for contiguous dwarf_regs array. (ebl_sample_perf_regs_mapping): New function. * libebl/eblclosebackend.c (ebl_closebackend): Free cached_regs_mapping. * libebl/libebl.h (ebl_set_initial_registers_sample): Now takes regs_mapping instead of regs_mask. (ebl_sample_base_addr): Removed. (ebl_sample_pc): Removed. (ebl_sample_sp_pc): New function. (ebl_sample_perf_regs_mapping): New function. * libebl/libeblP.h (struct ebl): Add caching fields to remove the need to repeat a sample_perf_regs_mapping() computation for every frame when the perf_regs_mask is consistent. * backends/Makefile.am: Remove no-longer-needed linux-perf-regs.c. * backends/i386_init.c (i386_init): Renamed sample_* functions, added cached_regs_mapping and related fields/functions. * backends/i386_initreg_sample.c (i386_sample_base_addr): Removed. (i386_sample_pc): Removed. (i386_sample_sp_pc): New function combining the removed functions. (i386_set_initial_registers_sample): Removed. (i386_sample_perf_regs_mapping): New function translating perf_regs_mask to regs_mapping array. * backends/linux-perf-regs.c: Removed as perf_sample_find_reg is no longer needed. * backends/x86_64_init.c (x86_64_init): Renamed sample_* functions, added cached_regs_mapping and related fields/functions. * backends/x86_64_initreg_sample.c (x86_64_sample_base_addr): Removed. (x86_64_sample_pc): Removed. (x86_64_sample_sp_pc): New function combining the removed functions. (x86_64_set_initial_registers_sample): Removed. (x86_64_sample_perf_regs_mapping): New function translating perf_regs_mask to regs_mapping array. * backends/x86_initreg_sample.c (x86_set_initial_registers_sample): Removed. (x86_sample_sp_pc): New function. (x86_sample_perf_regs_mapping): New function translating perf_regs_mask to regs_mapping array. Signed-off-by: Serhei Makarov <[email protected]>
* backends/ppc_attrs.c: Add PPC long double tagsA. Wilcox2025-05-301-0/+12
| | | | | | | | | | | | When an explicit type of long double is specified in the ELF GNU_Power_ABI_FP attribute, elflint and friends were erroring out: section [36] '.gnu.attributes': offset 15: unrecognized GNU_Power_ABI_FP attribute value 9 Add the different long double tags to fp_kinds so that these values are correctly recognised and printed. Signed-off-by: A. Wilcox <[email protected]>
* PR32930 backends/: guard asm/perf_regs.h includeSerhei Makarov2025-05-061-2/+6
| | | | | | | | | | | | | | asm/perf_regs.h is an arch-specific linux include, not present on architectures like hppa and m68k that lack perf_events support. Only one place we need to fix; others already guard the include by architecture, or use architecture-independent headers (e.g. linux/perf_events.h). * backends/libebl_PERF_FLAGS.h: Only include asm/perf_regs.h on architectures where we use it. Signed-off-by: Serhei Makarov <[email protected]>
* libebl [1/12]: api for perf register handling, start with x86_64Serhei Makarov2025-04-258-7/+430
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | First patch of a series that reworks eu-stacktrace functionality into a library interface for other profiling tools. * * * As it happens, Linux perf_events and DWARF can prescribe completely different layouts for the register file, requiring non-obvious code for translation. This makes sense to put in libebl if we want profilers to handle perf sample data with elfutils. Start with the x86_64/i386 implementation taken from eu-stacktrace. The code has been generalized to accept other perf register masks besides the 'preferred' one. * backends/Makefile.am (i386_SRCS): Add i386_initreg_sample.c. (x86_64_SRCS): Add x86_64_initreg_sample.c. (noinst_HEADERS): Add libebl_PERF_FLAGS.h, linux-perf-regs.c, x86_initreg_sample.c. * backends/libebl_PERF_FLAGS.h: New file. * backends/linux-perf-regs.c: New file. (perf_sample_find_reg): Index into a perf register array whose contents are described by regs_mask. The target index is the index of the register in the enum defined by linux arch/N/include/uapi/asm/perf_regs.h on arch N. * backends/x86_initreg_sample.c: New file, implements a generalized version of the eu-stacktrace register shuffling for x86-64/i386. * backends/x86_64_initreg_sample.c: New file, specializes x86_initreg_sample.c for x86-64. * backends/i386_initreg_sample.c: New file, specializes i386_initreg_sample.c for i386. * backends/x86_64_init.c (x86_64_init): Add initialization for set_initial_registers_sample, perf_frame_regs_mask, sample_base_addr, sample_pc. * backends/i386_init.c (i386_init): Add initialization for set_initial_registers_sample, perf_frame_regs_mask, sample_base_addr, sample_pc. * libebl/Makefile.am (libebl_a_SOURCES): Add eblinitreg_sample.c. * libebl/ebl-hooks.h (set_initial_registers_sample): New hook. (sample_base_addr): Ditto. (sample_pc): Ditto. * libebl/eblinitreg_sample.c: New file, implements ebl interface to set_initial_registers_sample, sample_base_addr, sample_pc backend hooks. * libebl/libebl.h (ebl_set_initial_registers_sample): New function. (ebl_perf_frame_regs_mask): New function. (ebl_sample_base_addr): New function. (ebl_sample_pc): New function. * libebl/libeblP.h (struct ebl): Add perf_frame_regs_mask field giving the preferred register mask. Signed-off-by: Serhei Makarov <[email protected]>
* aarch64: define struct user_pac_mask if neededMarkus Mayer2025-02-231-0/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On Aarch64, Linux is using Pointer Authentication Code (PAC) for pointer authentication.[1] The struct "user_pac_mask" has been part of the Linux kernel since version 5.0 as part of this feature. However, older kernels do not define it. Therefore, we want to check if the definition is present in the kernel headers and provide one if it isn't. This ensures two things: * elfutils will continue to compile against kernel headers from 4.x * binaries built against older kernel headers will still be fully functional if used on a newer system For reference, the build error that is being avoided looks like this: [...] CC aarch64_initreg.o aarch64_initreg.c: In function 'aarch64_set_initial_registers_tid': aarch64_initreg.c:61:24: error: storage size of 'pac_mask' isn't known struct user_pac_mask pac_mask; ^~~~~~~~ aarch64_initreg.c:61:24: warning: unused variable 'pac_mask' [-Wunused-variable] make[4]: *** [Makefile:831: aarch64_initreg.o] Error 1 make[3]: *** [Makefile:547: all-recursive] Error 1 make[2]: *** [Makefile:463: all] Error 2 [1] https://docs.kernel.org/arch/arm64/pointer-authentication.html https://sourceware.org/bugzilla/show_bug.cgi?id=32684 Fixes: 64e3b451ad2c ("aarch64: extend dwfl_thread_state_registers to handle PAC") Signed-off-by: Markus Mayer <[email protected]>
* Replace usage of ar with stored library manifest filesMichael Pratt2025-01-211-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ar program is called to assemble a list of objects within each archive to assist in building combined libraries, however make already has this information when processing the subdirectory for that respective library. The list can be saved in a "manifest" file instead of being generated whenever it is needed for use with other subdirectories. Even though the difference in time is insignificant, a simple "echo" and "cat" is as much as 10 times faster than a call to "ar t" for printing the archive members. Since elfutils builds ar, this also removes the awkward circular dependency where an installation of ar is required to build the libraries for ar. Additionally, not every version of ar is equally portable, as native versions of ar on macOS and other BSD-like distributions may print out a special archive member like "__.SYMDEF" which is not a compiled object but rather just metadata from ranlib, leading to a build failure. Avoid these limitations by removing usage of ar and adding build and clean rules for the usage of archive manifest files. * .gitignore: exclude ".manifest" file extension. * backends/Makefile.am: add manifest file build and clean rules. * debuginfod/Makefile.am: Likewise. * lib/Makefile.am: Likewise. * libasm/Makefile.am: Likewise. * libcpu/Makefile.am: Likewise. * libdw/Makefile.am: Likewise, and set object lists to manifest contents. * libdwelf/Makefile.am: Likewise. * libdwfl/Makefile.am: Likewise. * libebl/Makefile.am: Likewise. * libelf/Makefile.am: Likewise, and set object lists to manifest contents. * src/Makefile.am: Likewise. Signed-off-by: Michael Pratt <[email protected]>
* backends: check_special_symbol _GLOBAL_OFFSET_TABLE_ points inside .gotMark Wielaard2024-12-301-3/+24
| | | | | | | | | | If desthdr is ".got.plt" search for the actual ".got" section and make sure the _GLOBAL_OFFSET_TABLE_ points to it. * backends/riscv_symbol.c (riscv_check_special_symbol): Check sname is ".got.plt", find ".got" scn to check sym st_value. Signed-off-by: Mark Wielaard <[email protected]>
* Consolidate and add files to clean target variablesupstream/users/amerey/try-cleanMichael Pratt2024-11-081-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | To increase the consistency of how automatic clean targets run, define the variables together without +=, default to MOSTLYCLEANFILES when there is no need for different levels or add more clean levels to match other subdirectories, add more files that are built, remove duplication, and cleanup. Do the same for EXTRA_DIST where it is equally messy. * backends/Makefile.am: add more objects to clean, improve spacing. * debuginfod/Makefile.am: Likewise, and remove duplicates. * lib/Makefile.am: improve spacing. * libasm/Makefile.am: add more objects to clean, split similar to debuginfod. * libcpu/Makefile.am: use normal =, add more objects to clean. * libdw/Makefile.am: add more objects to clean, split similar to debuginfod. * libdwelf/Makefile.am: add more objects to clean, use lowest clean level. * libdwfl/Makefile.am: Likewise. * libebl/Makefile.am: add more objects to clean. * libelf/Makefile.am: add more objects to clean, split similar to debuginfod. * src/Makefile.am: consolidate including EXTRA_DIST, split clean levels, define with normal =, define with variables. * tests/Makefile.am: Likewise, but not including EXTRA_DIST. Signed-off-by: Michael Pratt <[email protected]>
* aarch64: Add NT_ARM_PAC_* regsetKuan-Ying Lee2024-08-301-0/+9
| | | | | | | Add the NT_ARM_PAC_MASK and NT_ARM_PAC_ENABLED_KEYS for aarch64. Recognize and print the new core item. Signed-off-by: Kuan-Ying Lee <[email protected]>
* libdwfl, aarch64: Read PAC mask from coreSteve Capper2024-08-301-2/+15
| | | | | | | | | | We need to read the PAC mask from a core file when debugging offline as the information is still needed to demangle return addresses. This commit pulls out the NT_ARM_PAC_MASK info from the core and feeds it through to dwfl_thread_state_registers for each thread. Signed-off-by: Steve Capper <[email protected]>
* libdwfl, aarch64: extend dwfl_thread_state_registers to handle PACSteve Capper2024-08-301-0/+10
| | | | | | | | | | | | | | | | | On AArch64 systems with pointer authentication enabled, one needs to know the PAC mask in order to unwind functions that employ PAC. This patch extends dwfl_thread_state_registers to handle the PAC mask information by introducing a special register -2. (-1 is used in a similar manner already for handling the program counter). The AArch64 linux process attach logic is also extended to query ptrace for the PAC mask. A subsequent patch will add support for retrieving the PAC mask from an AArch64 linux core file. Signed-off-by: Steve Capper <[email protected]>
* aarch64: Create definitions for AARCH64_RA_SIGN_STATE registerGerman Gomez2024-08-302-1/+6
| | | | | | | | | | | This register will be used to indicate whether a return address is mangled with a PAC or not, in accordance with the DWARF AARCH64 ABI [1]. [1] https://github.com/ARM-software/abi-aa/blob/main/aadwarf64/aadwarf64.rst#41dwarf-register-names Signed-off-by: German Gomez <[email protected]> [SteveC: move DW_AARCH64_RA_SIGN_STATE to cfi.h, fix comments] Signed-off-by: Steve Capper <[email protected]>
* aarch64: Add NT_ARM_TAGGED_ADDR_CTRL regsetKuan-Ying Lee2024-08-171-1/+10
| | | | | | | Add the NT_ARM_TAGGED_ADDR_CTRL regset for aarch64. Recognize and print this new core itme. Signed-off-by: Kuan-Ying Lee <[email protected]>
* backends/riscv: Remove unused relocationsAndreas Schwab2024-08-071-7/+0
| | | | | | | | | | | None of these relocations were ever part of any object file. The GNU_VTINHERIT and GNU_VTINHERIT relocations were part of the obsolete --gc-sections support which was never implemented for RISC-V. The other relocations are only used internally by libbfd during the relaxation pass and eliminated before writing the object file. * riscv_reloc.def: Remove GNU_VTINHERIT, GNU_VTENTRY, RVC_LUI, GPREL_I, GPREL_S, TPREL_I, TPREL_S.
* backends: allocate enough stace for null terminatorSergei Trofimovich2024-07-182-2/+17
| | | | | | | | | | | | | | | | | | | `gcc-15` added a new warning in https://gcc.gnu.org/PR115185: i386_regs.c:88:11: error: initializer-string for array of 'char' is too long [-Werror=unterminated-string-initialization] 88 | "ax", "cx", "dx", "bx", "sp", "bp", "si", "di", "ip" | ^~~~ `elfutils` does not need to store '\0'. We could either initialize the arrays with individual bytes or allocate extra byte for null. This change initializes the array bytewise. * backends/i386_regs.c (i386_register_info): Initialize the array bytewise to fix gcc-15 warning. * backends/x86_64_regs.c (x86_64_register_info): Ditto. Signed-off-by: Sergei Trofimovich <[email protected]>
* backends: Add register_info, return_value_location, core_note on mipsYing Huang2024-04-055-1/+421
| | | | | | | | | | | | * backends/Makefile.am (mips_SRCS): Add mips_regs.c, mips_retval.c and mips_corenote.c. * backends/mips_init.c (mips_init): HOOK register_info, return_value_location and core_note. * backends/mips_corenote.c: New file. * backends/mips_regs.c: Likewise. * backends/mips_retval.c: Likewise. Signed-off-by: Ying Huang <[email protected]>
* stack: Fix stack unwind failure on mipsYing Huang2024-04-055-1/+219
| | | | | | | | | | | | | | Add abi_cfi, set_initial_registers_tid, unwind on mips. * backends/Makefile.am (mips_SRCS): Add mips_initreg.c, mips_cfi.c and mips_unwind.c. * backends/mips_init.c (mips_init): HOOK abi_cfi, unwind and set_initial_registers_tid. Set frame_nregs to 71. * backends/mips_cfi.c: New file. * backends/mips_initreg.c: Likewise. * backends/mips_unwind.c: Likewise. Signed-off-by: Ying Huang <[email protected]>
* Hexagon: implement machine flag checkMatheus Tavares Bernardino2024-04-042-0/+8
| | | | | | | | | | | | | This fixes the "invalid machine flag" error from eu-elflint when passing hexagon binaries. * backends/hexagon_init.c (hexagon_init): Hook machine_flag_check * backends/hexagon_symbol.c (hexagon_machine_flag_check): new function * libelf/elf-knowledge.h: add EF_HEXAGON_TINY constant Signed-off-by: Matheus Tavares Bernardino <[email protected]>
* Add support for HexagonMatheus Tavares Bernardino2024-04-044-2/+244
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This implements initial support for the Hexagon architecture. The Hexagon ABI spec can be seen at https://lists.llvm.org/pipermail/llvm-dev/attachments/20190916/21516a52/attachment-0001.pdf A hello_hexagon.ko test is also added. $ head tests/test-suite.log [...] # TOTAL: 275 # PASS: 269 # SKIP: 6 # XFAIL: 0 # FAIL: 0 # XPASS: 0 # ERROR: 0 $ cat tests/run-strip-reloc-ko.sh.log [...] runtest hello_hexagon.ko PASS run-strip-reloc-ko.sh (exit status: 0) * backends/Makefile.am (modules): Add hexagon. (hexagon_SRCS): New var for hexagon_init.c and hexagon_symbol.c. (libebl_backends_a_SOURCES): Add hexagon_SRCS. * backends/hexagon_init.c: New file. * backends/hexagon_reloc.def: Likewise. * backends/hexagon_symbol.c: Likewise. * libebl/eblopenbackend.c (hexagon_init): Declare. (machines): Add hexagon. * libelf/elf-knowledge.h: Add hexagon e_flags values, section indices and and relocs. * src/elflint.c (valid_e_machine): Add EM_QDSP6. * tests/Makefile.am (EXTRA_DIST): Add hello_hexagon.ko.bz2. * tests/hello_hexagon.ko.bz2: New test file. * tests/run-strip-reloc-ko.sh: Add hello_hexagon.ko. Signed-off-by: Matheus Tavares Bernardino <[email protected]>
* Support Mips architectureYing Huang2024-03-294-2/+212
| | | | | | | | | | | | | | * backends/Makefile.am (modules): Add mips. (mips_SRCS): New var for mips_init.c mips_symbol.c. (libebl_backends_a_SOURCES): Add mips_SRCS. * backends/mips_init.c: New file. * backends/mips_reloc.def: Likewise. * backends/mips_symbol.c: Likewise. * libebl/eblopenbackend.c (mips_init): Declare. (machines): Add mips. * libelf/libelfP.h: Add ELF64_MIPS_R_TYPE{1,2,3} Signed-off-by: Ying Huang <[email protected]>
* riscv: Partial implementation of flatten_aggregateMark Wielaard2024-03-201-11/+112
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | dwfl_module_return_value_location would fail on riscv for functions which return a (small) struct. This patch implements the simplest cases of flatten_aggregate in backends/riscv_retval.c. It just handles structs containing one or two members of the same base type which fit completely or in pieces in one or two general or floating point registers. It also adds a specific test case run-funcretval-struct.sh containing small structs of ints, longs, floats and doubles. All these testscases now work for riscv. There is already a slightly more extensive testcase for this in tests/run-funcretval.sh but that only has a testcase for aarch64. * backends/riscv_retval.c (flatten_aggregate_arg): Implement for the simple cases where we have a struct with one or two members of the same base type. (pass_by_flattened_arg): Likewise. Call either pass_in_gpr_lp64 or pass_in_fpr_lp64d. (riscv_return_value_location_lp64ifd): Call flatten_aggregate_arg including size. * tests/Makefile.am (TESTS): Add run-funcretval-struct.sh and run-funcretval-struct-native.sh. (check_PROGRAMS): Add funcretval_test_struct. (funcretval_test_struct_SOURCES): New. (EXTRA_DIST): Add run-funcretval-struct.sh, funcretval_test_struct_riscv.bz2 and run-funcretval-struct-native.sh. * tests/funcretval_test_struct_riscv.bz2: New test binary. * tests/run-funcretval-struct-native.sh: New test. * tests/run-funcretval-struct.sh: Likewise. https://sourceware.org/bugzilla/show_bug.cgi?id=31142 Signed-off-by: Mark Wielaard <[email protected]>
* backends: Update list of LoongArch relocationsXi Ruoyao2024-02-241-0/+17
| | | | Signed-off-by: Xi Ruoyao <[email protected]>
* backends: Fix arm_machine_flag_name version string.Mark Wielaard2023-11-131-1/+1
| | | | | | | | | | | | | arm_machine_flag_name checks the version byte and if not zero returns a version string. There are only 5 versions defined. So check the version byte is not larger. * backends/arm_machineflagname.c (arm_machine_flag_name): Check version <= 0, otherwise return NULL. https://sourceware.org/bugzilla/show_bug.cgi?id=31058 Signed-off-by: Mark Wielaard <[email protected]>
* backends: Update list of LoongArch relocationsXi Ruoyao2023-08-291-0/+9
| | | | | | | * backends/loongarch_reloc.def: Add DELETE, ALIGN, PCREL20_S2, CFA, ADD6, SUB6, ADD_ULEB128, SUB_ULEB128, 64_PCREL. Signed-off-by: Xi Ruoyao <[email protected]>
* backends: Update list of RISC-V relocationsAndreas Schwab2023-06-271-0/+4
| | | | | | | * backends/riscv_reloc.def: Add IRELATIVE, PLT32, SET_ULEB128, SUB_ULEB128. Signed-off-by: Andreas Schwab <[email protected]>
* backends: Add set_initial_registers_tid callback for LoongArchYouling Tang2023-05-094-1/+96
| | | | | | | This patch implements the set_initial_registers_tid hook for LoongArch. Signed-off-by: Liwei Ge <[email protected]> Signed-off-by: Youling Tang <[email protected]>
* backends: Add core_note callback for LoongArchYouling Tang2023-05-094-1/+122
| | | | Signed-off-by: Youling Tang <[email protected]>
* backends: Add frame pointer unwinding for LoongArchYouling Tang2023-05-094-1/+93
| | | | | | | | | | | If we don't find any debug information for a given frame, we usually cannot unwind any further. However, the binary in question might have been compiled with frame pointers, in which case we can look up the well known frame pointer locations in the stack snapshot and use them to bridge the frames without debug information. Signed-off-by: Liwei Ge <[email protected]> Signed-off-by: Youling Tang <[email protected]>
* backends: Add initial return value location support for LoongArchYouling Tang2023-05-094-1/+212
| | | | | | | | LoongArch ELF ABI specification - Return values: https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html#_return_values Signed-off-by: Liwei Ge <[email protected]> Signed-off-by: Youling Tang <[email protected]>
* backends: Add abi_cfi and register_info callbacks for LoongArchYouling Tang2023-05-095-2/+238
| | | | | | | | | | | LoongArch Reference Manual - Volume 1: https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html LoongArch ELF ABI: https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html Signed-off-by: Liwei Ge <[email protected]> Signed-off-by: Youling Tang <[email protected]>
* backends: Check results for NULL early in dwarf_peeled_die_typeMark Wielaard2023-04-141-3/+3
| | | | | | | | | | | Calling dwarf_peeled_die_type with a NULL results pointer is an error, check early that result is not NULL so dwarf_formref_die and dwarf_peel_type won't try to set the NULL Dwarf_Die. * backends/libebl_CPU.h (dwarf_peeled_die_type): Move check for results == NULL to start of function. Signed-off-by: Mark Wielaard <[email protected]>
* backends: add checks for _GLOBAL_OFFSET_TABLE_ on loongarchYouling Tang2023-04-073-0/+41
| | | | | | | | | | | | | | | | Add handling of _GLOBAL_OFFSET_TABLE_. Before applying the patch: $ ./src/elflint --gnu-ld ./src/elflint section [35] '.symtab': _GLOBAL_OFFSET_TABLE_ symbol value 0x68548 does not match .got.plt section address 0x68238 After applying the patch: $ ./src/elflint --gnu-ld ./src/elflint No errors Signed-off-by: Liwei Ge <[email protected]> Signed-off-by: Youling Tang <[email protected]>
* backends: Add new relocation type handling for LoongArchYouling Tang2023-04-072-0/+44
| | | | | | Add new relocation type handling. Signed-off-by: Youling Tang <[email protected]>
* LoongArch: implemented a basic machine flag checkAlexey Sheplyakov2023-03-202-0/+8
| | | | | | | | | | | | | | | | | | | | With this patch I can use eu-elflint to verify LoongArch ELF binaries. Previously eu-elflint was complaining about invalid machine flags: $ ./src/elflint --gnu-ld ./src/elflint invalid machine flags: 0x43 $ echo $? 1 * backends/loongarch_symbol.c (loongarch_init): Hook machine_flag_check. * backends/loongarch_symbol.c (loongarch_machine_flag_check): New function. https://sourceware.org/bugzilla/show_bug.cgi?id=30251 Signed-off-by: Alexey Sheplyakov <[email protected]>
* backends: Handle DW_TAG_unspecified_type in dwarf_peeled_die_typeMark Wielaard2023-02-142-2/+17
| | | | | | | | | | | | | | | | binutils 2.40 introduces DW_TAG_unspecified_type for assembly functions with an unknown return type. This breaks the run-funcretval.sh testcase because dwfl_module_return_value_location returns an error for such functions because it cannot determine the return value location. Fix that by treating DW_TAG_unspecified_type as if the DIE doesn't have a DW_AT_type. Also update the testcase to explicitly checking for DW_TAG_unspecified_type and printing "returns unspecified type". https://sourceware.org/bugzilla/show_bug.cgi?id=30047 Signed-off-by: Mark Wielaard <[email protected]>
* backends: Support returning lvalue and rvalue referencesIlya Leoshkevich2023-02-1414-40/+42
| | | | | | | | | On the low level, they are the same as pointers. The change needs to be done for all backends, so define a function and a macro to avoid repetition. Also add a native test, which has to be implemented in C++. Add the configure check for it. Signed-off-by: Ilya Leoshkevich <[email protected]>
* Initialize reglocs for VMCOREINFOIlya Leoshkevich2023-02-081-0/+1
| | | | | | | | | | | | | | | | | MSan complains: Uninitialized value was created by an allocation of 'reglocs' in the stack frame #0 0x562d35c686f0 in handle_core_note elfutils/src/readelf.c:12674:3 #const Ebl_Register_Location *reglocs; ==1006199==WARNING: MemorySanitizer: use-of-uninitialized-value #0 0x562d35c68a2a in handle_core_note elfutils/src/readelf.c:12692:11 #colno = handle_core_registers (ebl, ebl->elf, desc + regs_offset, # reglocs, nregloc); Strictly speaking, this is not a problem, because nregloc == 0, but for other note types we initialize it anyway, so do it here as well. Signed-off-by: Ilya Leoshkevich <[email protected]>
* backends: sparc uses NONE relocation type in ET_EXEC and ET_DYN filesMark Wielaard2023-01-192-1/+5
| | | | | | | | | Using the NONE relocation doesn't do anything, but is harmless. This fixes several (self) tests on sparc that use elflint to check files are valid ELF. Signed-off-by: Mark Wielaard <[email protected]>
* Add support for Synopsys ARCv2 processorsShahab Vahedi2022-12-225-2/+240
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is no regression in tests for an x86_64 build, while the new hello_arc_hs4.ko is added as well. This is the only meaningful test that I could add at the moment, given the features supported by this port. $ cat tests/test-suite.log ========================================== elfutils 0.188: tests/test-suite.log ========================================== # TOTAL: 236 # PASS: 235 # SKIP: 1 # XFAIL: 0 # FAIL: 0 # XPASS: 0 # ERROR: 0 .. contents:: :depth: 2 SKIP: run-lfs-symbols.sh ======================== LFS testing is irrelevant on this system SKIP run-lfs-symbols.sh (exit status: 77) $ cat tests/run-strip-reloc.sh.log runtest hello_i386.ko runtest hello_x86_64.ko runtest hello_ppc64.ko runtest hello_s390.ko runtest hello_aarch64.ko runtest hello_m68k.ko runtest hello_riscv64.ko runtest hello_csky.ko runtest hello_arc_hs4.ko <-- [ new ARC HS4 test ] runtest /home/shahab/pahole_pkg/elfutils-git/bld_arc/src/strip runtest /home/shahab/pahole_pkg/elfutils-git/bld_arc/src/strip.o runtest strip-uncompressed.o runtest strip-compressed.o runtest testfile-debug-rel-ppc64.o runtest testfile-debug-rel-ppc64-z.o runtest testfile-debug-rel-ppc64-g.o PASS run-strip-reloc.sh (exit status: 0) Signed-off-by: Shahab Vahedi <[email protected]>
* Add support for LoongArchHengqi Chen2022-12-195-2/+217
| | | | | | This implements initial support for the LoongArch architecture. Signed-off-by: Hengqi Chen <[email protected]>
* backends: Handle new RISC-V specific definitionsAndreas Schwab2022-08-093-0/+58
| | | | | | Handle PT_RISCV_ATTRIBUTES, SHT_RISCV_ATTRIBUTES, DT_RISCV_VARIANT_CC. Signed-off-by: Andreas Schwab <[email protected]>
* Arm Ehdr flag printingUlrich Drepper2022-06-064-1/+165
| | | | | | | | | | | | | | | | | | Arm needs to decode flags and I modeled it after the binutils code. The same messages are printed. Given the requirement of the interface and the ABIs the current version of the callback function isn't sufficient unless one wants to create a stateful interface. The problem is that most flags need to be interpreted in the context of the ABI version. So I changed the API to also pass the original flag value. This shouldn't be a problem because there are no users yet. There is also a bug in ebl_machine_flag_name. When copying the string provided by the callback cp is moved past the NUL byte. It should move to the NUL byte. Otherwise one cannot anything but the first added flag description. Finally some cosmetic changes (space after each comma in the output). Signed-off-by: Mark Wielaard <[email protected]>
* backends: Use PTRACE_GETREGSET for ppc_set_initial_registers_tidMark Wielaard2022-02-162-25/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The code in ppc_initreg.c used PTRACE_PEEKUSER to fetch all registers one by one. Which is slightly inefficient. It did this because it wanted things to work on linux 2.6.18 which didn't support PTRACE_GETREGSET. PTRACE_GETREGSET was only officially since 2.6.34 (but backported to some earlier versions). It seems ok to require a linux kernel that supports PTRACE_GETREGSET now. This is much more efficient since it takes just one ptrace call instead of 44 calls to fetch each register individually. For some really old versions we need to include <linux/ptrace.h> to get PTRACE_GETREGSET defined. And on ppc64 there is no 32bit version of struct pt_regs available, so we define that ourselves and check how much data is returned to know whether this is a full pt_regs or one for a 32bit process. An alternative would be to use the raw iov_base bytes with 64bit or 32bit offset constants to get at the registers instead of using a struct with names. The code works for inspecting a 32bit process from a 64bit build, but not the other way around (the previous code also didn't). This could work if we also defined and used a 64bit pt_regs struct on ppc32. But it seems a use case that is not really used (it was hard enough finding ppc32 setups to test this on). Tested against ppc and ppc64 on linux 2.6.32 and glibc 2.12 and ppc and ppc64 on linux 3.10.0 with glibc 2.17. Signed-off-by: Mark Wielaard <[email protected]>
* RISC-V: PR27925 Add support for LP64 and LP64F ABIs return valuesWilliam Cohen2021-09-303-16/+104
| | | | | | | | | | | | The RISC-V Linux kernel is compiled without floating point (the LP64 ABI) and elfutils could not obtain return value locations for functions in the kernel. This issue was noticed when Systemtap generated RISC-V kernel modules for scripts that used $return target variables in function return probes. This patch adds the needed support to provide return value information for the LP64 and LP64F ABIs. Signed-off-by: William Cohen <[email protected]>
* Come up with startswith function.Martin Liska2021-05-123-2/+11
| | | | | | | New function in system.h that returns true if a string has a given prefix, false otherwise. Use it in place of strncmp. Signed-off-by: Martin Liška <[email protected]>
* backends/ppc_initreg.c: include <asm/ptrace.h>.Érico Rolim2021-02-052-0/+5
| | | | | | | Necessary on musl for struct pt_regs definition, doesn't affect the build on glibc, since <sys/user.h> includes the same header. Signed-off-by: Érico Rolim <[email protected]>
* backends: fix spelling typos in commentsDmitry V. Levin2020-12-123-2/+8
| | | | | | | adress -> address sigle -> single Signed-off-by: Dmitry V. Levin <[email protected]>
* backends: Handle SHT_X86_64_UNWIND as valid relocation target type.Mark Wielaard2020-11-173-0/+14
| | | | | | | | | The x86_64 abi defines a special section type for .eh_frame[_hdr], SHT_X86_64_UNWIND, which is a valid relocation target type. https://sourceware.org/bugzilla/show_bug.cgi?id=26878 Signed-off-by: Mark Wielaard <[email protected]>
* backends: Remove tilegx backend.Mark Wielaard2020-10-268-584/+14
| | | | | | | | Support for the Tilera TILE-Gx processor has been removed or deprecated in gcc and binutils already. There are no users and there is no way to test it. Signed-off-by: Mark Wielaard <[email protected]>
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