about summary refs log tree commit diff
path: root/sysdeps/arc
Commit message (Collapse)AuthorAgeFilesLines
* login: Check default sizes of structs utmp, utmpx, lastlogFlorian Weimer2024-04-191-0/+3
| | | | | | | | The default <utmp-size.h> is for ports with a 64-bit time_t. Ports with a 32-bit time_t or with __WORDSIZE_TIME64_COMPAT32=1 need to override it. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* string: Use builtins for ffs and ffsllAdhemerval Zanella Netto2024-02-011-0/+2
| | | | | | | It allows to remove a lot of arch-specific implementations. Checked on x86_64, aarch64, powerpc64. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Update copyright dates with scripts/update-copyrightsPaul Eggert2024-01-0144-44/+44
|
* configure: Use autoconf 2.71Siddhesh Poyarekar2023-07-171-38/+51
| | | | | | | | | | | | | | Bump autoconf requirement to 2.71 to allow regenerating configure on more recent distributions. autoconf 2.71 has been in Fedora since F36 and is the current version in Debian stable (bookworm). It appears to be current in Gentoo as well. All sysdeps configure and preconfigure scripts have also been regenerated; all changes are trivial transformations that do not affect functionality. Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Fix misspellings in sysdeps/ -- BZ 25337Paul Pluzhnikov2023-05-301-1/+1
|
* ARC:fpu: add extra capability check before use of sqrt and fma builtinsPavel Kozlov2023-02-172-4/+24
| | | | | | | | | | | | | | | | | | | | Add extra check for compiler definitions to ensure that compiler provides sqrt and fma hw fpu instructions else use software implementation. As divide/sqrt and FMA hw support from CPU side is optional, the compiler can be configured by options to generate hw FPU instructions, but without use of FDDIV, FDSQRT, FSDIV, FSSQRT, FDMADD and FSMADD instructions. In this case __builtin_sqrt and __builtin_sqrtf provided by compiler can't be used inside the glibc code, as these builtins are used in implementations of sqrt() and sqrtf() functions but at the same time these builtins unfold to sqrt() and sqrtf(). So it is possible to receive code like that: 0001c4b4 <__ieee754_sqrtf>: 1c4b4: 0001 0000 b 0 ;1c4b4 <__ieee754_sqrtf> The same is also true for __builtin_fma and __builtin_fmaf. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Update copyright dates with scripts/update-copyrightsJoseph Myers2023-01-0644-44/+44
|
* ARC: update definitions in elf/elf.hShahab Vahedi2022-11-291-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While porting ARCv2 to elfutils [1], it was brought up that the necessary changes to the project's libelf/elf.h must come from glibc, because they sync it from glibc [2]. Therefore, this patch is to update ARC entries in elf/elf.h. The majority of the update is about adding new definitions, specially for the relocations. However, there is one rename, one deletion, and one change: - R_ARC_JUMP_SLOT renamed to R_ARC_JMP_SLOT to match binutils. - R_ARC_B26 removed because it is unused and deprecated. - R_ARC_TLS_DTPOFF_S9 changed from 0x4a to the correct value 0x49. Finally, a specific SHT class for ARC has been added to glibcelf.py. Else, it would result in a collision: _register_elf_h(Sht, ranges=True, File "/src/glibc/scripts/glibcelf.py", line x, in _register_elf_h raise ValueError('duplicate value {}: {}, {}'.format( ValueError: duplicate value 1879048193: SHT_ARC_ATTRIBUTES, SHT_X86_64_UNWIND [1] https://sourceware.org/pipermail/elfutils-devel/2022q4/005530.html [2] https://sourceware.org/pipermail/elfutils-devel/2022q4/005548.html No regression has been observed after applying this patch. Below follows the result: UNSUPPORTED: crypt/cert UNSUPPORTED: elf/tst-audit22 FAIL: elf/tst-audit25a FAIL: elf/tst-audit25b FAIL: elf/tst-bz15311 FAIL: elf/tst-bz28937 FAIL: elf/tst-dlmopen4 UNSUPPORTED: elf/tst-dlopen-self-container UNSUPPORTED: elf/tst-dlopen-tlsmodid-container UNSUPPORTED: elf/tst-glibc-hwcaps-prepend-cache UNSUPPORTED: elf/tst-ldconfig-bad-aux-cache UNSUPPORTED: elf/tst-ldconfig-ld_so_conf-update UNSUPPORTED: elf/tst-pldd UNSUPPORTED: elf/tst-preload-pthread-libc XPASS: elf/tst-protected1a XPASS: elf/tst-protected1b FAIL: elf/tst-tls-allocation-failure-static-patched FAIL: elf/tst-tls1 FAIL: elf/tst-tls3 FAIL: elf/tst-tlsalign-extern UNSUPPORTED: elf/tst-valgrind-smoke UNSUPPORTED: grp/tst-initgroups1 UNSUPPORTED: grp/tst-initgroups2 UNSUPPORTED: io/tst-getcwd-smallbuff UNSUPPORTED: locale/tst-localedef-path-norm FAIL: localedata/sort-test UNSUPPORTED: localedata/tst-localedef-hardlinks FAIL: malloc/tst-malloc-thread-fail-malloc-check FAIL: malloc/tst-malloc_info-malloc-check UNSUPPORTED: math/test-fesetexcept-traps UNSUPPORTED: math/test-fexcept-traps UNSUPPORTED: math/test-nearbyint-except UNSUPPORTED: math/test-nearbyint-except-2 UNSUPPORTED: misc/tst-adjtimex UNSUPPORTED: misc/tst-clock_adjtime FAIL: misc/tst-misalign-clone FAIL: misc/tst-misalign-clone-internal UNSUPPORTED: misc/tst-ntp_adjtime UNSUPPORTED: misc/tst-pkey UNSUPPORTED: misc/tst-rseq UNSUPPORTED: misc/tst-rseq-disable UNSUPPORTED: misc/tst-syslog UNSUPPORTED: misc/tst-ttyname FAIL: nptl/test-cond-printers FAIL: nptl/test-condattr-printers FAIL: nptl/test-mutex-printers FAIL: nptl/test-mutexattr-printers FAIL: nptl/test-rwlock-printers FAIL: nptl/test-rwlockattr-printers UNSUPPORTED: nptl/tst-pthread-gdb-attach UNSUPPORTED: nptl/tst-pthread-gdb-attach-static UNSUPPORTED: nptl/tst-pthread-getattr UNSUPPORTED: nptl/tst-rseq-nptl UNSUPPORTED: nss/tst-nss-compat1 UNSUPPORTED: nss/tst-nss-db-endgrent UNSUPPORTED: nss/tst-nss-db-endpwent UNSUPPORTED: nss/tst-nss-files-hosts-long UNSUPPORTED: nss/tst-nss-gai-actions UNSUPPORTED: nss/tst-nss-test3 UNSUPPORTED: nss/tst-reload1 UNSUPPORTED: nss/tst-reload2 UNSUPPORTED: posix/bug-ga2 UNSUPPORTED: posix/bug-ga2-mem FAIL: posix/globtest UNSUPPORTED: posix/tst-vfork3 UNSUPPORTED: posix/tst-vfork3-mem UNSUPPORTED: resolv/mtrace-tst-leaks2 UNSUPPORTED: resolv/tst-leaks2 UNSUPPORTED: resolv/tst-resolv-ai_idn UNSUPPORTED: resolv/tst-resolv-ai_idn-latin1 UNSUPPORTED: resolv/tst-resolv-res_init UNSUPPORTED: resolv/tst-resolv-res_init-thread UNSUPPORTED: rt/tst-bz28213 UNSUPPORTED: rt/tst-mqueue1 UNSUPPORTED: rt/tst-mqueue10 UNSUPPORTED: rt/tst-mqueue2 UNSUPPORTED: rt/tst-mqueue3 UNSUPPORTED: rt/tst-mqueue4 UNSUPPORTED: rt/tst-mqueue5 UNSUPPORTED: rt/tst-mqueue6 UNSUPPORTED: rt/tst-mqueue8 UNSUPPORTED: rt/tst-mqueue8x UNSUPPORTED: rt/tst-mqueue9 UNSUPPORTED: stdlib/test-bz22786 UNSUPPORTED: stdlib/tst-system UNSUPPORTED: string/test-bcopy UNSUPPORTED: string/test-memmove UNSUPPORTED: string/tst-memmove-overflow UNSUPPORTED: string/tst-strerror UNSUPPORTED: string/tst-strsignal UNSUPPORTED: time/tst-clock_settime UNSUPPORTED: time/tst-settimeofday Summary of test results: 21 FAIL 4184 PASS 69 UNSUPPORTED 16 XFAIL 2 XPASS Signed-off-by: Shahab Vahedi <shahab@synopsys.com> Signed-off-by: Vineet Gupta <vineet.gupta@linux.dev>
* elf: Introduce <dl-call_tls_init_tp.h> and call_tls_init_tp (bug 29249)Florian Weimer2022-11-031-2/+1
| | | | | | | | This makes it more likely that the compiler can compute the strlen argument in _startup_fatal at compile time, which is required to avoid a dependency on strlen this early during process startup. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* Use PTR_MANGLE and PTR_DEMANGLE unconditionally in C sourcesFlorian Weimer2022-10-181-2/+0
| | | | | | | | | | | | | | | | | In the future, this will result in a compilation failure if the macros are unexpectedly undefined (due to header inclusion ordering or header inclusion missing altogether). Assembler sources are more difficult to convert. In many cases, they are hand-optimized for the mangling and no-mangling variants, which is why they are not converted. sysdeps/s390/s390-32/__longjmp.c and sysdeps/s390/s390-64/__longjmp.c are special: These are C sources, but most of the implementation is in assembler, so the PTR_DEMANGLE macro has to be undefined in some cases, to match the assembler style. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Introduce <pointer_guard.h>, extracted from <sysdep.h>Florian Weimer2022-10-181-0/+1
| | | | | | | | | | | | | | This allows us to define a generic no-op version of PTR_MANGLE and PTR_DEMANGLE. In the future, we can use PTR_MANGLE and PTR_DEMANGLE unconditionally in C sources, avoiding an unintended loss of hardening due to missing include files or unlucky header inclusion ordering. In i386 and x86_64, we can avoid a <tls.h> dependency in the C code by using the computed constant from <tcb-offsets.h>. <sysdep.h> no longer includes these definitions, so there is no cyclic dependency anymore when computing the <tcb-offsets.h> constants. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Use atomic_exchange_release/acquireWilco Dijkstra2022-09-261-1/+1
| | | | | | | Rename atomic_exchange_rel/acq to use atomic_exchange_release/acquire since these map to the standard C11 atomic builtins. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* csu: Change start code license to have link exceptionSzabolcs Nagy2022-08-261-1/+18
| | | | | | | | | | | | | | | The start code can get linked into dynamic linked executables where LGPL would require shipping the source or linkable binaries when the executable is distributed. On some targets the license exception was missing in start.S (which is compiled into crt1.o and Scrt1.o which may end up linked into PDE and PIE binaries). I did not review what other code may end up in executables, just fixed the start.S license inconsistency across targets. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* elf: Remove ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATAFangrui Song2022-06-151-21/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | If an executable has copy relocations for extern protected data, that can only work if the library containing the definition is built with assumptions (a) the compiler emits GOT-generating relocations (b) the linker produces R_*_GLOB_DAT instead of R_*_RELATIVE. Otherwise the library uses its own definition directly and the executable accesses a stale copy. Note: the GOT relocations defeat the purpose of protected visibility as an optimization, but allow rtld to make the executable and library use the same copy when copy relocations are present, but it turns out this never worked perfectly. ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA has strange semantics when both a.so and b.so define protected var and the executable copy relocates var: b.so accesses its own copy even with GLOB_DAT. The behavior change is from commit 62da1e3b00b51383ffa7efc89d8addda0502e107 (x86) and then copied to nios2 (ae5eae7cfc9c4a8297ff82ec6b794faca1976ecc) and arc (0e7d930c4c11de896fe807f67fa1eb756c9c1e05). Without ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA, b.so accesses the copy relocated data like a.so. There is now a warning for copy relocation on protected symbol since commit 7374c02b683b7110b853a32496a619410364d70b. It's extremely unlikely anyone relies on the ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA behavior, so let's remove it: this removes a check in the symbol lookup code.
* arc: Remove _dl_skip_args usageAdhemerval Zanella2022-05-301-15/+2
| | | | | | | | Since ad43cac44a the generic code already shuffles the argv/envp/auxv on the stack to remove the ld.so own arguments and thus _dl_skip_args is always 0. So there is no need to adjust the argc or argv. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* rtld: Remove DL_ARGV_NOT_RELRO and make _dl_skip_args constSzabolcs Nagy2022-05-171-4/+0
| | | | | | | | | | | _dl_skip_args is always 0, so the target specific code that modifies argv after relro protection is applied is no longer used. After the patch relro protection is applied to _dl_argv consistently on all targets. Reviewed-by: Florian Weimer <fweimer@redhat.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* elf: Replace PI_STATIC_AND_HIDDEN with opposite HIDDEN_VAR_NEEDS_DYNAMIC_RELOCFangrui Song2022-04-262-3/+0
| | | | | | | | | | | | | | | | | | PI_STATIC_AND_HIDDEN indicates whether accesses to internal linkage variables and hidden visibility variables in a shared object (ld.so) need dynamic relocations (usually R_*_RELATIVE). PI (position independent) in the macro name is a misnomer: a code sequence using GOT is typically position-independent as well, but using dynamic relocations does not meet the requirement. Not defining PI_STATIC_AND_HIDDEN is legacy and we expect that all new ports will define PI_STATIC_AND_HIDDEN. Current ports defining PI_STATIC_AND_HIDDEN are more than the opposite. Change the configure default. No functional change. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Update copyright dates with scripts/update-copyrightsPaul Eggert2022-01-0145-45/+45
| | | | | | | | | | | | | | | | | | | | | | | I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
* malloc: Remove memusage.hAdhemerval Zanella2021-12-281-21/+0
| | | | | | And use machine-sp.h instead. The Linux implementation is based on already provided CURRENT_STACK_FRAME (used on nptl code) and STACK_GROWS_UPWARD is replaced with _STACK_GROWS_UP.
* Remove atomic-machine.h atomic typedefsAdhemerval Zanella2021-12-281-12/+0
| | | | Now that memusage.c uses generic types we can remove them.
* malloc: Remove atomic_* usageAdhemerval Zanella2021-12-281-2/+0
| | | | | These typedef are used solely on memusage and can be replaced with generic types.
* Remove ununsed tcb-offsetAdhemerval Zanella2021-12-172-33/+0
| | | | Some architectures do not use the auto-generated tcb-offsets.h.
* Remove TLS_TCB_ALIGN and TLS_INIT_TCB_ALIGNFlorian Weimer2021-12-091-6/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | TLS_INIT_TCB_ALIGN is not actually used. TLS_TCB_ALIGN was likely introduced to support a configuration where the thread pointer has not the same alignment as THREAD_SELF. Only ia64 seems to use that, but for the stack/pointer guard, not for storing tcbhead_t. Some ports use TLS_TCB_OFFSET and TLS_PRE_TCB_SIZE to shift the thread pointer, potentially landing in a different residue class modulo the alignment, but the changes should not impact that. In general, given that TLS variables have their own alignment requirements, having different alignment for the (unshifted) thread pointer and struct pthread would potentially result in dynamic offsets, leading to more complexity. hppa had different values before: __alignof__ (tcbhead_t), which seems to be 4, and __alignof__ (struct pthread), which was 8 (old default) and is now 32. However, it defines THREAD_SELF as: /* Return the thread descriptor for the current thread. */ # define THREAD_SELF \ ({ struct pthread *__self; \ __self = __get_cr27(); \ __self - 1; \ }) So the thread pointer points after struct pthread (hence __self - 1), and they have to have the same alignment on hppa as well. Similarly, on ia64, the definitions were different. We have: # define TLS_PRE_TCB_SIZE \ (sizeof (struct pthread) \ + (PTHREAD_STRUCT_END_PADDING < 2 * sizeof (uintptr_t) \ ? ((2 * sizeof (uintptr_t) + __alignof__ (struct pthread) - 1) \ & ~(__alignof__ (struct pthread) - 1)) \ : 0)) # define THREAD_SELF \ ((struct pthread *) ((char *) __thread_self - TLS_PRE_TCB_SIZE)) And TLS_PRE_TCB_SIZE is a multiple of the struct pthread alignment (confirmed by the new _Static_assert in sysdeps/ia64/libc-tls.c). On m68k, we have a larger gap between tcbhead_t and struct pthread. But as far as I can tell, the port is fine with that. The definition of TCB_OFFSET is sufficient to handle the shifted TCB scenario. This fixes commit 23c77f60181eb549f11ec2f913b4270af29eee38 ("nptl: Increase default TCB alignment to 32"). Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
* nptl: Introduce <tcb-access.h> for THREAD_* accessorsFlorian Weimer2021-12-091-9/+1
| | | | | | | These are common between most architectures. Only the x86 targets are outliers. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* nptl: Increase default TCB alignment to 32Florian Weimer2021-12-031-3/+0
| | | | | | | | | | rseq support will use a 32-byte aligned field in struct pthread, so the whole struct needs to have at least that alignment. nptl/tst-tls3mod.c uses TCB_ALIGNMENT, therefore include <descr.h> to obtain the fallback definition. Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
* elf: Fix dynamic-link.h usage on rtld.cAdhemerval Zanella2021-10-141-6/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 4af6982e4c fix does not fully handle RTLD_BOOTSTRAP usage on rtld.c due two issues: 1. RTLD_BOOTSTRAP is also used on dl-machine.h on various architectures and it changes the semantics of various machine relocation functions. 2. The elf_get_dynamic_info() change was done sideways, previously to 490e6c62aa get-dynamic-info.h was included by the first dynamic-link.h include *without* RTLD_BOOTSTRAP being defined. It means that the code within elf_get_dynamic_info() that uses RTLD_BOOTSTRAP is in fact unused. To fix 1. this patch now includes dynamic-link.h only once with RTLD_BOOTSTRAP defined. The ELF_DYNAMIC_RELOCATE call will now have the relocation fnctions with the expected semantics for the loader. And to fix 2. part of 4af6982e4c is reverted (the check argument elf_get_dynamic_info() is not required) and the RTLD_BOOTSTRAP pieces are removed. To reorganize the includes the static TLS definition is moved to its own header to avoid a circular dependency (it is defined on dynamic-link.h and dl-machine.h requires it at same time other dynamic-link.h definition requires dl-machine.h defitions). Also ELF_MACHINE_NO_REL, ELF_MACHINE_NO_RELA, and ELF_MACHINE_PLT_REL are moved to its own header. Only ancient ABIs need special values (arm, i386, and mips), so a generic one is used as default. The powerpc Elf64_FuncDesc is also moved to its own header, since csu code required its definition (which would require either include elf/ folder or add a full path with elf/). Checked on x86_64, i686, aarch64, armhf, powerpc64, powerpc32, and powerpc64le. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* elf: Avoid nested functions in the loader [BZ #27220]Fangrui Song2021-10-071-7/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | dynamic-link.h is included more than once in some elf/ files (rtld.c, dl-conflict.c, dl-reloc.c, dl-reloc-static-pie.c) and uses GCC nested functions. This harms readability and the nested functions usage is the biggest obstacle prevents Clang build (Clang doesn't support GCC nested functions). The key idea for unnesting is to add extra parameters (struct link_map *and struct r_scope_elm *[]) to RESOLVE_MAP, ELF_MACHINE_BEFORE_RTLD_RELOC, ELF_DYNAMIC_RELOCATE, elf_machine_rel[a], elf_machine_lazy_rel, and elf_machine_runtime_setup. (This is inspired by Stan Shebs' ppc64/x86-64 implementation in the google/grte/v5-2.27/master which uses mixed extra parameters and static variables.) Future simplification: * If mips elf_machine_runtime_setup no longer needs RESOLVE_GOTSYM, elf_machine_runtime_setup can drop the `scope` parameter. * If TLSDESC no longer need to be in elf_machine_lazy_rel, elf_machine_lazy_rel can drop the `scope` parameter. Tested on aarch64, i386, x86-64, powerpc64le, powerpc64, powerpc32, sparc64, sparcv9, s390x, s390, hppa, ia64, armhf, alpha, and mips64. In addition, tested build-many-glibcs.py with {arc,csky,microblaze,nios2}-linux-gnu and riscv64-linux-gnu-rv64imafdc-lp64d. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* elf: Remove THREAD_GSCOPE_IN_TCBSergey Bugaev2021-09-161-1/+0
| | | | | | | | | All the ports now have THREAD_GSCOPE_IN_TCB set to 1. Remove all support for !THREAD_GSCOPE_IN_TCB, along with the definition itself. Signed-off-by: Sergey Bugaev <bugaevc@gmail.com> Message-Id: <20210915171110.226187-4-bugaevc@gmail.com> Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
* Remove sysdeps/*/tls-macros.hFangrui Song2021-08-181-47/+0
| | | | | | | | They provide TLS_GD/TLS_LD/TLS_IE/TLS_IE macros for TLS testing. Now that we have migrated to __thread and tls_model attributes, these macros are unused and the tls-macros.h files can retire. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
* ARC: elf: make type safeVineet Gupta2021-07-211-13/+10
| | | | Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
* ARC: fp: (micro)optimize FPU_STATUS read by eliding FWE bit clearingVineet Gupta2021-07-211-8/+7
| | | | | | | | | | | | | | | | Any FPU_STATUS write needs setting the FWE bit (31) whcih just provides a "control signal" to enable explicit write (vs. the side-effect of FPU instructions). However this bit is RAZ and write-only, thus effectively never stored in FPU_STATUS register. Thus when reading the register there is no need to clear it. This shaves off a BCLR instruction from the fe*exceptino family of functions and while no big deal still makes sense to do. This came up when debugging a race in math/test-fenv-tls [1] [1]: https://github.com/foss-for-synopsys-dwc-arc-processors/linux/issues/54 Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
* ARC: Update ulpsVineet Gupta2021-04-142-25/+29
| | | | | | Needed after 43576de04afc6 Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
* Reduce the statically linked startup code [BZ #23323]Florian Weimer2021-02-251-4/+3
| | | | | | | | | | | | | | | | | | | It turns out the startup code in csu/elf-init.c has a perfect pair of ROP gadgets (see Marco-Gisbert and Ripoll-Ripoll, "return-to-csu: A New Method to Bypass 64-bit Linux ASLR"). These functions are not needed in dynamically-linked binaries because DT_INIT/DT_INIT_ARRAY are already processed by the dynamic linker. However, the dynamic linker skipped the main program for some reason. For maximum backwards compatibility, this is not changed, and instead, the main map is consulted from __libc_start_main if the init function argument is a NULL pointer. For statically linked binaries, the old approach based on linker symbols is still used because there is nothing else available. A new symbol version __libc_start_main@@GLIBC_2.34 is introduced because new binaries running on an old libc would not run their ELF constructors, leading to difficult-to-debug issues.
* ARC: nofpu: Regenerate ulpsVineet Gupta2021-01-171-5/+6
|
* ARC: Regenerate ulpsVineet Gupta2021-01-081-4/+4
| | | | | | | | | | | | | Reinstate pass for FAIL: math/test-double-cosh FAIL: math/test-double-sinh FAIL: math/test-float32x-cosh FAIL: math/test-float32x-sinh FAIL: math/test-float64-cosh FAIL: math/test-float64-sinh FAIL: math/test-ldouble-cosh FAIL: math/test-ldouble-sinh
* Update copyright dates with scripts/update-copyrightsPaul Eggert2021-01-0248-48/+48
| | | | | | | | | | | | | | | | I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
* nptl: Move stack list variables into _rtld_globalFlorian Weimer2020-11-161-2/+0
| | | | | | | | | Now __thread_gscope_wait (the function behind THREAD_GSCOPE_WAIT, formerly __wait_lookup_done) can be implemented directly in ld.so, eliminating the unprotected GL (dl_wait_lookup_done) function pointer. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* aarch64: enforce >=64K guard size [BZ #26691]Szabolcs Nagy2020-10-021-0/+3
| | | | | | | | | | | | | | | | | | | | | | | There are several compiler implementations that allow large stack allocations to jump over the guard page at the end of the stack and corrupt memory beyond that. See CVE-2017-1000364. Compilers can emit code to probe the stack such that the guard page cannot be skipped, but on aarch64 the probe interval is 64K by default instead of the minimum supported page size (4K). This patch enforces at least 64K guard on aarch64 unless the guard is disabled by setting its size to 0. For backward compatibility reasons the increased guard is not reported, so it is only observable by exhausting the address space or parsing /proc/self/maps on linux. On other targets the patch has no effect. If the stack probe interval is larger than a page size on a target then ARCH_MIN_GUARD_SIZE can be defined to get large enough stack guard on libc allocated stacks. The patch does not affect threads with user allocated stacks. Fixes bug 26691.
* ARC: Build InfrastructureVineet Gupta2020-07-107-0/+276
| | | | Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* ARC: ABI listsVineet Gupta2020-07-104-0/+1414
| | | | Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* ARC: Linux ABIVineet Gupta2020-07-101-0/+32
| | | | Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* ARC: hardware floating point supportVineet Gupta2020-07-1020-0/+711
| | | | Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* ARC: math soft float supportVineet Gupta2020-07-105-0/+203
| | | | Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* ARC: Atomics and Locking primitivesVineet Gupta2020-07-101-0/+69
| | | | Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* ARC: Thread Local Storage supportVineet Gupta2020-07-105-0/+240
| | | | | | This includes all 4 TLS addressing models Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* ARC: startup and dynamic linking codeVineet Gupta2020-07-107-0/+591
| | | | | | Code for C runtime startup and dynamic loading including PLT layout. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* ARC: ABI ImplementationVineet Gupta2020-07-1017-0/+547
This code deals with the ARC ABI. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-06-16 05:25:36 +0000