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* backends: add checks for _GLOBAL_OFFSET_TABLE_ and __global_pointer$ on riscvAndreas Schwab2018-05-153-0/+38
| | | | Signed-off-by: Andreas Schwab <schwab@suse.de>
* Add support for RISC-VAndreas Schwab2018-04-235-2/+215
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This implements initial support for the RISC-V architecture. It has been tested with qemu linux-user emulation <https://build.opensuse.org/package/live_build_log/openSUSE:Factory:RISCV/elfutils/standard/riscv64>, with the following unresolved issues FAIL: run-strip-strmerge.sh =========================== elflint /home/abuild/rpmbuild/BUILD/elfutils-0.170/tests/elfstrmerge section [32] '.symtab': _GLOBAL_OFFSET_TABLE_ symbol value 0x51c0 does not match .got section address 0x5010 section [32] '.symtab': symbol 119: st_value out of bounds FAIL run-strip-strmerge.sh (exit status: 1) FAIL: run-elflint-self.sh ========================= section [33] '.symtab': _GLOBAL_OFFSET_TABLE_ symbol value 0x6220 does not match .got section address 0x6008 section [33] '.symtab': symbol 135: st_value out of bounds *** failure in /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/elflint --quiet --gnu-ld /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/addr2line section [33] '.symtab': _GLOBAL_OFFSET_TABLE_ symbol value 0x91d8 does not match .got section address 0x9040 section [33] '.symtab': symbol 163: st_value out of bounds *** failure in /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/elflint --quiet --gnu-ld /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/elfcmp section [33] '.symtab': _GLOBAL_OFFSET_TABLE_ symbol value 0x1a2a0 does not match .got section address 0x1a040 section [33] '.symtab': symbol 267: st_value out of bounds *** failure in /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/elflint --quiet --gnu-ld /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/elflint section [33] '.symtab': _GLOBAL_OFFSET_TABLE_ symbol value 0xd418 does not match .got section address 0xd0f0 section [33] '.symtab': symbol 238: st_value out of bounds *** failure in /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/elflint --quiet --gnu-ld /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/nm section [33] '.symtab': _GLOBAL_OFFSET_TABLE_ symbol value 0xa2d0 does not match .got section address 0xa0b0 section [33] '.symtab': symbol 193: st_value out of bounds *** failure in /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/elflint --quiet --gnu-ld /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/objdump section [33] '.symtab': _GLOBAL_OFFSET_TABLE_ symbol value 0x2e5b8 does not match .got section address 0x2e058 section [33] '.symtab': symbol 410: st_value out of bounds *** failure in /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/elflint --quiet --gnu-ld /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/readelf section [32] '.symtab': _GLOBAL_OFFSET_TABLE_ symbol value 0x171b8 does not match .got section address 0x17010 *** failure in /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/elflint --quiet --gnu-ld /home/abuild/rpmbuild/BUILD/elfutils-0.170/libelf/libelf.so section [32] '.symtab': _GLOBAL_OFFSET_TABLE_ symbol value 0x3a5b0 does not match .got section address 0x3a0d8 *** failure in /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/elflint --quiet --gnu-ld /home/abuild/rpmbuild/BUILD/elfutils-0.170/libdw/libdw.so section [31] '.symtab': _GLOBAL_OFFSET_TABLE_ symbol value 0xd0c8 does not match .got section address 0xd008 *** failure in /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/elflint --quiet --gnu-ld /home/abuild/rpmbuild/BUILD/elfutils-0.170/backends/libebl_i386.so section [31] '.symtab': _GLOBAL_OFFSET_TABLE_ symbol value 0xf0c8 does not match .got section address 0xf008 *** failure in /home/abuild/rpmbuild/BUILD/elfutils-0.170/src/elflint --quiet --gnu-ld /home/abuild/rpmbuild/BUILD/elfutils-0.170/backends/libebl_x86_64.so FAIL run-elflint-self.sh (exit status: 1) FAIL: run-native-test.sh ======================== /home/abuild/rpmbuild/BUILD/elfutils-0.170/tests/allregs: dwfl_module_register_names: no backend registers known FAIL run-native-test.sh (exit status: 1) FAIL: run-backtrace-native-core.sh ================================== backtrace: backtrace.c:111: callback_verify: Assertion `symname && strcmp (symname, "raise") == 0' failed. ./test-subr.sh: line 84: 26040 Aborted (core dumped) LD_LIBRARY_PATH="${built_library_path}${LD_LIBRARY_PATH:+:}$LD_LIBRARY_PATH" $VALGRIND_CMD "$@" backtrace-child-core.26027: no main rmdir: failed to remove 'test-26016': Directory not empty FAIL run-backtrace-native-core.sh (exit status: 1) In addition, all tests that use ptrace are failing as linux-user emulation does not implement it. There are no regressions for a x86_64 build. Signed-off-by: Andreas Schwab <schwab@suse.de>
* aarch64: Add default cfi rule to restore SP from CFA address.Mark Wielaard2018-04-132-2/+10
| | | | | | | | | The CFA is set by default to the stack pointer of the previous frame. So that is also how we can always restore the SP. This default aarch64 CFI rule is necessary on Fedora 28 with GCC8 to make the run-deleted.sh and run-backtrace-dwarf.sh testcases work. Signed-off-by: Mark Wielaard <mark@klomp.org>
* Include sys/ptrace.h as early as possible.Mark Wielaard2018-02-152-2/+7
| | | | | | | | | | | | | | | | | | | On some systems, at least on Fedora 27 ppc64le with glibc 2.26-24 and kernel 4.14.18-300, including sys/ptrace.h late (after signal.h or sys/wait.h for example) will cause issues and produce errors like: In file included from /usr/include/asm/sigcontext.h:12:0, from /usr/include/bits/sigcontext.h:30, from /usr/include/signal.h:287, from /usr/include/sys/wait.h:36, from linux-pid-attach.c:38: /usr/include/sys/ptrace.h:73:3: error: expected identifier before numeric constant PTRACE_GETREGS = 12, ^ Swapping the include order fixes these issues. Signed-off-by: Mark Wielaard <mark@klomp.org>
* Use fallthrough attribute.Joshua Watt2018-02-1019-26/+48
| | | | | | | | | | | | | | | Use __attribute__ ((fallthrough)) to indicate switch case fall through instead of a comment. This ensures that the fallthrough warning is not triggered even if the file is pre-processed (hence stripping the comments) before it is compiled. The actual fallback implementation is hidden behind a FALLBACK macro in case the compiler doesn't support it. Finally, the -Wimplict-fallthrough warning was upgraded to only allow the attribute to satisfy it; a comment alone is no longer sufficient. Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
* backends: Ignore GCC8 -Wpacked-not-aligned for m68k_corenote.c.Mark Wielaard2017-10-262-0/+11
| | | | | | | | | The GCC8 -Wpacked-not-aligned warns if a structure field with explicit padding in a packed structure will be misaligned. m68k prstatus core notes are described by a packed structure which has such aligned structure fields. Signed-off-by: Mark Wielaard <mark@klomp.org>
* Make sure packed structs follow the gcc memory layoutUlf Hermann2017-09-202-1/+5
| | | | | | | | | | | | | | gcc defaults to using struct layouts that follow the native conventions, even if __attribute__((packed)) is given. In order to get the layout we expect, we need to tell gcc to always use the gcc struct layout, at least for packed structs. To do this, we can use the gcc_struct attribute. This is important, not only for porting to windows, but also potentially for other platforms, as the bugs resulting from struct layout differences are rather subtle and hard to find. Signed-off-by: Ulf Hermann <ulf.hermann@qt.io>
* Check for -z,defs, -z,relro, -fPIC, -fPIE before using themUlf Hermann2017-08-182-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | Those flags are not available on all platforms, and omitting them when not available will not cause any harm. In particular: -z,defs disallows undefined symbols in object files. This option is unsupported if the target binary format enforces the same condition already. Furthermore it is only a compile time sanity check. When it is omitted, the same binary is produced. -z,relro instructs the loader to mark sections read-only after loading the library, where possible. This is a hardening mechanism. If it is unavailable, the functionality of the code is not affected in any way. -fPIC instructs the compiler to produce position independent code. While this is preferable to relocatable code, relocatable code also works and may even be faster. Relocatable code might just be loaded into memory multiple times for different processes. -fPIE is the same thing as -fPIC for executables rather than shared libraries. Signed-off-by: Ulf Hermann <ulf.hermann@qt.io>
* backends: sparc GOTDATA_OP[_HIX22|LOX10] can be used in ET_REL files.Mark Wielaard2017-08-022-3/+8
| | | | | | Tested on new GNU Compile Farm server gcc202. Signed-off-by: Mark Wielaard <mark@klomp.org>
* ppc64: Add HTM SPRs support to readelfGustavo Romero2017-07-253-3/+28
| | | | | | | | | | Since POWER8, PowerPC 64 supports Hardware Transactional Memory, which has three special purpose registers associated to it: tfhar, tfiar, and texasr. This commit add HTM SPRs set as known note type so it's possible to use 'readelf --notes' to inspect the HTM SPRs in a coredump file generated in such a machines. Signed-off-by: Gustavo Romero <gromero@linux.vnet.ibm.com>
* strip: Deal with ARM data marker symbols pointing to debug sections.Mark Wielaard2017-07-245-4/+38
| | | | | | | | | | | | | | | | | | | ARM data marker symbols "$d" indicate the start of a sequence of data items in a section. For data only sections no data marker symbol is necessary, but may be put pointing to the start of the section. binutils however has a bug which places a data marker symbol somewhere inside the section (at least for .debug_frame). https://sourceware.org/bugzilla/show_bug.cgi?id=21809 When strip finds a symbol pointing to a debug section that would be put into the .debug file then it will copy over the whole symbol table. This isn't necessary because the symbol is redundant. Add an ebl hook to recognize data marker symbols with implementations for arm and aarch64. Use it in strip to strip such symbols from the symbol table if they point to a debug section. Signed-off-by: Mark Wielaard <mark@klomp.org>
* backends: Don't depend on linux/bpf.h to compile bpf disassembler.Mark Wielaard2017-07-244-12/+8
| | | | | | | | | We only need a few constants and one structure definition from linux/bpf. Just define those in a local lib/bpf.h file. This makes sure the bpf disassembler is always build and included even when elfutils is build on older GNU/Linux systems (and even on other platforms). Signed-off-by: Mark Wielaard <mark@klomp.org>
* Unify linking of libasm, libelf, libdw, backendsUlf Hermann2017-07-242-3/+10
| | | | | | | | | | Link them all with -z,defs,-z,relro,--no-undefined, provide complete dependencies for the link steps, and add libeu.a to each one. libeu.a contains useful library functionality that each of them might use. The linker will strip unneeded symbols, so linking it in won't hurt even if none of the functions are used. Signed-off-by: Ulf Hermann <ulf.hermann@qt.io>
* backends: Swap sys/ptrace.h and asm/ptrace.h include order on s390.Mark Wielaard2017-07-172-1/+5
| | | | | | | | | glibc 2.26 changed the sys/ptrace.h header so that it cannot be included after asm/ptrace.h. We still need to include the kernel asm/ptrace.h for the ptrace_area definition. Including it after sys/ptrace.h works against both old and new glibc. Signed-off-by: Mark Wielaard <mark@klomp.org>
* Support EM_PPC machine flagsAndreas Schwab2017-06-153-0/+16
| | | | | | | This fixes the elflint self test when the compiler is configured for PIE default. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
* ppc64: Add minimal fallback unwinder.Mark Wielaard2017-06-124-1/+84
| | | | | | | | | | | | | This adds a minimal fallback unwinder for ppc64[le] in case we cannot find CFI for a particular address. It simply always sets the program counter to the link register, picks the previous stack pointer from the backchain, and the previous link register from the LR save area. This is enough for some simple situations when we don't have CFI and seems to work nicely in the case of perf with libdw powerpc support: https://lkml.org/lkml/2017/5/18/998 Signed-off-by: Mark Wielaard <mark@klomp.org>
* Add frame pointer unwinding for aarch64 and relax backtrace testcases.Ulf Hermann2017-05-024-1/+91
| | | | | | | | | | | | | | | 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. Relax the backtrace core testcases a little by allowing a duplicate sigusr2 frame or a backtrace ending with an invalid register. Both of which can happen if the frame pointer unwinder guesses slightly wrong. Signed-off-by: Ulf Hermann <ulf.hermann@qt.io> Signed-off-by: Mark Wielaard <mark@klomp.org>
* Add i386 frame pointer unwinder.Mark Wielaard2017-05-024-2/+93
| | | | | | | Add a simple i386_unwind.c frame pointer unwinder as fallback if DWARF/CFI unwinding fails. Signed-off-by: Mark Wielaard <mark@klomp.org>
* Add frame pointer unwinding as fallback on x86_64Ulf Hermann2017-05-024-1/+94
| | | | | | | | | | | | | | 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. The "unwind" hook is the right place for this as it is so far only used on s390 and called only after trying to unwind with debug information. Signed-off-by: Ulf Hermann <ulf.hermann@qt.io>
* Clean up linux-specific system includesUlf Hermann2017-04-266-8/+18
| | | | | | We only include them where we actually need them and only on linux. Signed-off-by: Ulf Hermann <ulf.hermann@qt.io>
* backends: Add support for EM_PPC64 GNU_ATTRIBUTES.Mark Wielaard2017-03-243-0/+8
| | | | | | | | ppc64 and ppc64le ELF files can also contain a power specific .gnu.attributes section. Add support for those and recognize the new GNU_Power_ABI_FP Single-precision hard float value. Signed-off-by: Mark Wielaard <mark@klomp.org>
* Add GCC7 -Wimplicit-fallthrough support/fixes.Mark Wielaard2016-11-107-8/+18
| | | | | | | | | | | GCC7 will have a new -Wimplicit-fallthrough warning. It did catch one small buglet in elflint option procession. So it seems useful to enable to make sure all swatch case fallthroughs are deliberate. Add configure check to detect whether gcc support -Wimplicit-fallthrough and enable it. Add fixes and explicit fallthrough comments where necessary. Signed-off-by: Mark Wielaard <mjw@redhat.com>
* sparc: fix the printing of hw capabilities object attributes.Jose E. Marchesi2016-08-242-23/+58
| | | | | | | | | | The GNU_Sparc_HWCAPS and GNU_Sparc_HWCAPS2 object attributes comprise a set of hardware capabilities that may (or not) be present in the target machine for which the object was compiled. This patch adds the support for printing a nicely formatted comma-separated list with the selected hw capabilities. Signed-off-by: Jose E. Marchesi <jose.marchesi@oracle.com>
* Add m68k testsAndreas Schwab2016-07-113-1/+12
| | | | Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
* Add support for BPFRichard Henderson2016-06-286-4/+183
| | | | Signed-off-by: Richard Henderson <rth@redhat.com>
* Add support for m68kAndreas Schwab2016-05-239-3/+545
| | | | Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
* sparc: restore 32-bit build.Jose E. Marchesi2016-02-262-1/+7
| | | | | | | This patch provides a dummy sparc_set_initial_registers-tid for sparc32. This fixes the build in sparcv9-*-* targets. Signed-off-by: Jose E. Marchesi <jose.marchesi@oracle.com>
* Add support for DT_PPC_OPTAndreas Schwab2016-02-262-1/+9
| | | | | | https://sourceware.org/ml/binutils/2013-10/msg00378.html Signed-off-by: Andreas Schwab <schwab@suse.de>
* Add new i386 and x86_64 relocation types.Mark Wielaard2016-02-193-0/+8
| | | | | | | Update elf.h from glibc and recognize R_386_GOT32X, R_X86_64_GOTPCRELX and R_x86_64_REX_GOTPCRELX as non-dynamic relocations. Signed-off-by: Mark Wielaard <mjw@redhat.com>
* Add NT_ARM_SYSTEM_CALL aarch64 syscall regset.Mark Wielaard2016-02-152-1/+17
| | | | | | | | | Linux kernel 3.18 added the NT_ARM_SYSTEM_CALL regset for aarch64. Recognize and print this new core item. https://bugzilla.redhat.com/show_bug.cgi?id=1285613 Signed-off-by: Mark Wielaard <mjw@redhat.com>
* backends: sparc: support for live backtracesJose E. Marchesi2016-01-034-1/+137
| | | | | | | This patch implements the set_initial_registers_tid hook for sparc. It works in both sparcv9-*-* and sparc64-*-* targets. Signed-off-by: Jose E. Marchesi <jose.marchesi@oracle.com>
* backends: sparc: support for core backtracesJose E. Marchesi2016-01-035-2/+111
| | | | | | | | This patch adds sparc support to the unwinder, providing a default CFI program that works in both sparcv9-*-* and sparc64-*-* targets. Signed-off-by: Jose E. Marchesi <jose.marchesi@oracle.com> Signed-off-by: Mark Wielaard <mjw@redhat.com>
* Move nested functions in backends to file scope.Chih-Hung Hsieh2015-11-033-25/+40
| | | | | | | * backends/aarch64_regs.c and backends/ia64_retval.c should now compile with clang. Signed-off-by: Chih-Hung Hsieh <chh@google.com>
* ppc: ppc_check_special_symbol): Also allow _SDA_BASE_ in .data section.Mark Wielaard2015-10-162-3/+13
| | | | | | | | | The Small Data Area Base normally points to .sdata, in which case we check it is at an offset of 0x8000. It might however fall in the .data section, in which case we cannot check the offset. The size always should be zero. Signed-off-by: Mark Wielaard <mjw@redhat.com>
* Improve AM_SILENT_RULES coverageJosh Stone2015-10-062-2/+6
| | | | | | | | | | | Note, elfutils does not explicitly enable AM_SILENT_RULES. It's only available starting from automake 1.11, but starting from automake 1.13 silent rules are always generated, defaulting to verbose. $(AM_V_foo) additions should be no-ops on systems that don't support silent rules. To be silent, use "./configure --enable-silent-rules" or "make V=0". Signed-off-by: Josh Stone <jistone@redhat.com>
* sparc: support for the check_object_attribute ebl hook.Jose E. Marchesi2015-10-064-1/+83
| | | | | | | This makes elfutils based utilities to be aware of the ELF attribute tags defined in sparc targets. Signed-off-by: Jose E. Marchesi <jose.marchesi@oracle.com>
* sparc: fix the extraction of relocation IDs from r_type fields.Jose E. Marchesi2015-10-063-1/+27
| | | | | | | | | | This patch adds support for a RELOC_TYPE_ID transform macros that backends can use before including common-reloc.c. The sparc backend uses this in order to extract the relocation IDs from r_type fields. In this target the most significative 24 bits of r_type are used to store an additional addend in some relocation types. Signed-off-by: Jose E. Marchesi <jose.marchesi@oracle.com>
* sparc: add some missing relocation types.Jose E. Marchesi2015-10-052-0/+8
| | | | | | | This adds three missing relocation types in sparc targets: WDISP10, JMP_IREL and IRELATIVE. Signed-off-by: Jose E. Marchesi <jose.marchesi@oracle.com>
* Remove old-style function definitions.Mark Wielaard2015-09-234-22/+16
| | | | | | | We already require -std=gnu99 and old-style function definitions might hide some compiler warnings. Signed-off-by: Mark Wielaard <mjw@redhat.com>
* Replace some K&R function definitions with ansi-C definitions.Chih-Hung Hsieh2015-09-0713-60/+64
| | | | | Signed-off-by: Chih-Hung Hsieh <chh@google.com> Signed-off-by: Mark Wielaard <mjw@redhat.com>
* backends: Use ebl->class consistently in sparc backend.Mark Wielaard2015-09-032-6/+10
| | | | | | | | | | | sparc_init would check the ELF class to register to correct core_note handler. But sparc_register_info would check the ELF machine to determine whether the register set was 32 or 64 bits. This caused some confusion and assertion failures in readelf when printing core notes where the sparc machine and class didn't seem to match up. Check the ELF class in both sparc_unit and sparc_register_info to give consistent results. Signed-off-by: Mark Wielaard <mjw@redhat.com>
* Reduce scope of some includesPino Toscano2015-06-272-1/+5
| | | | | | | | Use some includes only according to the #ifdef block of the respective code, or matching the fact they are Linux-only. This way, includes potentially unportable are not unconditionally used. Signed-off-by: Pino Toscano <toscano.pino@tiscali.it>
* Update elf.h from glibc.Mark Wielaard2015-04-282-3/+8
| | | | Signed-off-by: Mark Wielaard <mjw@redhat.com>
* backends: Add x32_corenote.cH.J. Lu2015-04-016-11/+92
| | | | | | | | This patch adds x32_corenote.c to support x32 coredump. X32 coredump is a hybrid between ia32 coredump and x86-64 coredump. The exact formats are described in bfd/hosts/x86-64linux.h in GNU binutils source tree. Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
* backends: aarch64 can have _GLOBAL_OFFSET_TABLE_ point anywhere in .got.Mark Wielaard2015-03-272-5/+15
| | | | | | | | | | When building with relro aarch64 splits .got in a writable and read-only part. _GLOBAL_OFFSET_TABLE_ points to the first writable symbol, not the start of .got. https://bugzilla.redhat.com/show_bug.cgi?id=1201778 Signed-off-by: Mark Wielaard <mjw@redhat.com>
* backends: COPY relocations can also happen in ET_DYN.Mark Wielaard2015-03-1312-21/+36
| | | | | | | | | In particular COPY relocations might happen in PIE executables, which are ET_DYN. Found on Fedora Rawhide with run-elflint-self.sh. Signed-off-by: Mark Wielaard <mjw@redhat.com>
* Support STT_ARM_TFUNC symbol type in ebl_symbol_type_name hookPetr Machata2015-02-243-2/+21
| | | | Signed-off-by: Petr Machata <pmachata@redhat.com>
* backends: Check sh_entsize is not zero in ppc_symbol.c (find_dyn_got).Mark Wielaard2015-01-152-1/+6
| | | | | | Found with afl-fuzz. Signed-off-by: Mark Wielaard <mjw@redhat.com>
* avoid scary command outputUlrich Drepper2014-12-182-1/+5
| | | | | | The commands to check for invalid text relocations in the generated DSOs shouldn't be displayed. They contain an echo which prints the text. This patch suppresses the commands from being printed.
* Use elf_getphdrnum instead of accessing ehdr->e_phnum directly.Mark Wielaard2014-11-263-8/+18
| | | | | | | Using elf_getphdrnum lets us handle ELF files that use more than PN_XNUM phdrs. And guards against some corrupt files. Signed-off-by: Mark Wielaard <mjw@redhat.com>
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