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* x86-64: Don't use SSE resolvers for ISA level 3 or aboveH.J. Lu2024-02-281-6/+9
| | | | | | | | | | | | | | | | When glibc is built with ISA level 3 or above enabled, SSE resolvers aren't available and glibc fails to build: ld: .../elf/librtld.os: in function `init_cpu_features': .../elf/../sysdeps/x86/cpu-features.c:1200:(.text+0x1445f): undefined reference to `_dl_runtime_resolve_fxsave' ld: .../elf/librtld.os: relocation R_X86_64_PC32 against undefined hidden symbol `_dl_runtime_resolve_fxsave' can not be used when making a shared object /usr/local/bin/ld: final link failed: bad value For ISA level 3 or above, don't use _dl_runtime_resolve_fxsave nor _dl_tlsdesc_dynamic_fxsave. This fixes BZ #31429. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* x86: Update _dl_tlsdesc_dynamic to preserve caller-saved registersH.J. Lu2024-02-281-76/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | Compiler generates the following instruction sequence for GNU2 dynamic TLS access: leaq tls_var@TLSDESC(%rip), %rax call *tls_var@TLSCALL(%rax) or leal tls_var@TLSDESC(%ebx), %eax call *tls_var@TLSCALL(%eax) CALL instruction is transparent to compiler which assumes all registers, except for EFLAGS and RAX/EAX, are unchanged after CALL. When _dl_tlsdesc_dynamic is called, it calls __tls_get_addr on the slow path. __tls_get_addr is a normal function which doesn't preserve any caller-saved registers. _dl_tlsdesc_dynamic saved and restored integer caller-saved registers, but didn't preserve any other caller-saved registers. Add _dl_tlsdesc_dynamic IFUNC functions for FNSAVE, FXSAVE, XSAVE and XSAVEC to save and restore all caller-saved registers. This fixes BZ #31372. Add GLRO(dl_x86_64_runtime_resolve) with GLRO(dl_x86_tlsdesc_dynamic) to optimize elf_machine_runtime_setup. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
* Update copyright dates with scripts/update-copyrightsPaul Eggert2024-01-011-1/+1
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* x86-64: Fix the tcb field load for x32 [BZ #31185]H.J. Lu2023-12-221-2/+2
| | | | | | | | | | | | | | | | | | | | | | | _dl_tlsdesc_undefweak and _dl_tlsdesc_dynamic access the thread pointer via the tcb field in TCB: _dl_tlsdesc_undefweak: _CET_ENDBR movq 8(%rax), %rax subq %fs:0, %rax ret _dl_tlsdesc_dynamic: ... subq %fs:0, %rax movq -8(%rsp), %rdi ret Since the tcb field in TCB is a pointer, %fs:0 is a 32-bit location, not 64-bit. It should use "sub %fs:0, %RAX_LP" instead. Since _dl_tlsdesc_undefweak returns ptrdiff_t and _dl_make_tlsdesc_dynamic returns void *, RAX_LP is appropriate here for x32 and x86-64. This fixes BZ #31185.
* x86-64: Fix the dtv field load for x32 [BZ #31184]H.J. Lu2023-12-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On x32, I got FAIL: elf/tst-tlsgap $ gdb elf/tst-tlsgap ... open tst-tlsgap-mod1.so Thread 2 "tst-tlsgap" received signal SIGSEGV, Segmentation fault. [Switching to LWP 2268754] _dl_tlsdesc_dynamic () at ../sysdeps/x86_64/dl-tlsdesc.S:108 108 movq (%rsi), %rax (gdb) p/x $rsi $4 = 0xf7dbf9005655fb18 (gdb) This is caused by _dl_tlsdesc_dynamic: _CET_ENDBR /* Preserve call-clobbered registers that we modify. We need two scratch regs anyway. */ movq %rsi, -16(%rsp) movq %fs:DTV_OFFSET, %rsi Since the dtv field in TCB is a pointer, %fs:DTV_OFFSET is a 32-bit location, not 64-bit. Load the dtv field to RSI_LP instead of rsi. This fixes BZ #31184.
* Update copyright dates with scripts/update-copyrightsJoseph Myers2023-01-061-1/+1
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* Update copyright dates with scripts/update-copyrightsPaul Eggert2022-01-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | 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
* x86_64: Remove lazy tlsdesc relocation related codeSzabolcs Nagy2021-04-151-104/+0
| | | | | _dl_tlsdesc_resolve_rela and _dl_tlsdesc_resolve_hold are only used for lazy tlsdesc relocation processing which is no longer supported.
* Update copyright dates with scripts/update-copyrightsPaul Eggert2021-01-021-1/+1
| | | | | | | | | | | | | | | | I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
* hurd: keep only required PLTs in ld.soSamuel Thibault2020-11-111-4/+0
| | | | | | | | | | | | | | | | | | | | | We need NO_RTLD_HIDDEN because of the need for PLT calls in ld.so. See Roland's comment in https://sourceware.org/bugzilla/show_bug.cgi?id=15605 "in the Hurd it's crucial that calls like __mmap be the libc ones instead of the rtld-local ones after the bootstrap phase, when the dynamic linker is being used for dlopen and the like." We used to just avoid all hidden use in the rtld ; this commit switches to keeping only those that should use PLT calls, i.e. essentially those defined in sysdeps/mach/hurd/dl-sysdep.c: __assert_fail __assert_perror_fail __*stat64 _exit This fixes a few startup issues, notably the call to __tunable_get_val that is made before PLTs are set up.
* Update copyright dates with scripts/update-copyrights.Joseph Myers2020-01-011-1/+1
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* Prefer https to http for gnu.org and fsf.org URLsPaul Eggert2019-09-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
* Update copyright dates with scripts/update-copyrights.Joseph Myers2019-01-011-1/+1
| | | | | | | * All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
* x86: Add _CET_ENDBR to functions in dl-tlsdesc.SH.J. Lu2018-07-171-0/+5
| | | | | | | | | | | | | | | | | | | | | | | Add _CET_ENDBR to functions in dl-tlsdesc.S, which are called indirectly, to support IBT. Tested on i686 and x86-64. Reviewed-by: Carlos O'Donell <carlos@redhat.com> * sysdeps/i386/dl-tlsdesc.S (_dl_tlsdesc_return): Add _CET_ENDBR. (_dl_tlsdesc_undefweak): Likewise. (_dl_tlsdesc_dynamic): Likewise. (_dl_tlsdesc_resolve_abs_plus_addend): Likewise. (_dl_tlsdesc_resolve_rel): Likewise. (_dl_tlsdesc_resolve_rela): Likewise. (_dl_tlsdesc_resolve_hold): Likewise. * sysdeps/x86_64/dl-tlsdesc.S (_dl_tlsdesc_return): Likewise. (_dl_tlsdesc_undefweak): Likewise. (_dl_tlsdesc_dynamic): Likewise. (_dl_tlsdesc_resolve_rela): Likewise. (_dl_tlsdesc_resolve_hold): Likewise.
* hurd: Fix build without NO_HIDDENSamuel Thibault2018-01-061-0/+4
| | | | | | * sysdeps/i386/dl-tlsdesc.S (_dl_tlsdesc_dynamic) [NO_RTLD_HIDDEN]: Call JUMPTARGET (___tls_get_addr) instead of HIDDEN_JUMPTARGET (___tls_get_addr). * sysdeps/x86_64/dl-tlsdesc.S (_dl_tlsdesc_dynamic): Likewise.
* Update copyright dates with scripts/update-copyrights.Joseph Myers2018-01-011-1/+1
| | | | | | | * All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
* Update copyright dates with scripts/update-copyrights.Joseph Myers2017-01-011-1/+1
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* x86-64: Properly align stack in _dl_tlsdesc_dynamic [BZ #20309]H.J. Lu2016-07-121-6/+7
| | | | | | | | | | | | | | | | | | | | Since _dl_tlsdesc_dynamic is called via PLT, we need to add 8 bytes for push in the PLT entry to align the stack. [BZ #20309] * configure.ac (have-mtls-dialect-gnu2): Set to yes if -mtls-dialect=gnu2 works. * configure: Regenerated. * elf/Makefile [have-mtls-dialect-gnu2 = yes] (tests): Add tst-gnu2-tls1. (modules-names): Add tst-gnu2-tls1mod. ($(objpfx)tst-gnu2-tls1): New. (tst-gnu2-tls1mod.so-no-z-defs): Likewise. (CFLAGS-tst-gnu2-tls1mod.c): Likewise. * elf/tst-gnu2-tls1.c: New file. * elf/tst-gnu2-tls1mod.c: Likewise. * sysdeps/x86_64/dl-tlsdesc.S (_dl_tlsdesc_dynamic): Add 8 bytes for push in the PLT entry to align the stack.
* Update copyright dates with scripts/update-copyrights.Joseph Myers2016-01-041-1/+1
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* Update copyright dates with scripts/update-copyrights.Joseph Myers2015-01-021-1/+1
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* Add hidden __tls_get_addr/___tls_get_addr aliasH.J. Lu2014-12-211-1/+1
| | | | | | | | | | | | | | | | | | | | __tls_get_addr/___tls_get_addr is always defined in ld.so. There is no need to call them via PLT inside ld.so. This patch adds the hidden __tls_get_addr/___tls_get_addr aliases and calls them directly from _dl_tlsdesc_dynamic. There is no need to set up the EBX register in i386 _dl_tlsdesc_dynamic when calling the hidden ___tls_get_addr. * elf/dl-tls.c (__tls_get_addr): Provide the hidden definition if not defined. * sysdeps/i386/dl-tls.h (___tls_get_addr): Provide the hidden definition. * sysdeps/i386/dl-tlsdesc.S (_dl_tlsdesc_dynamic): Call the hidden ___tls_get_addr. * sysdeps/x86_64/dl-tlsdesc.S (_dl_tlsdesc_dynamic): Call the hidden __tls_get_addr. * sysdeps/generic/localplt.data (__tls_get_addr): Removed. * sysdeps/unix/sysv/linux/i386/localplt.data (___tls_get_addr): Likewise.
* Update copyright notices with scripts/update-copyrightsAllan McRae2014-01-011-1/+1
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* Fix typo in _dl_tlsdesc_resolve_hold.Ondřej Bílka2013-11-261-1/+1
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* Update copyright notices with scripts/update-copyrights.Joseph Myers2013-01-021-1/+1
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* Replace FSF snail mail address with URLs.Paul Eggert2012-02-091-3/+2
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* Introduce TLS descriptors for i386 and x86_64.Ulrich Drepper2008-05-131-0/+245
* include/inline-hashtab.h: New file, copied from 2005's libiberty, with fix for memory leak imported afterwards by Glauber de Oliveira Costa. * elf/tlsdeschtab.h: New file. * elf/dl-reloc.c (_dl_try_allocate_static_tls): Extract from... (_dl_allocate_static_tls): ... here. Rearrange failure path. (CHECK_STATIC_TLS): Move to... * elf/dynamic-link.h: ... this file. (TRY_STATIC_TLS): New macro. * elf/dl-conflict.c (CHECK_STATIC_TLS, TRY_STATIC_TLS): Override. * elf/elf.h (R_386_TLS_GOTDESC, R_386_TLS_DESC_CALL, R_386_TLS_DESC): Define. (R_X86_64_PC64, R_X86_GOTOFF64, R_X86_64_GOTPC32): Merge from binutils. (R_X86_64_GOTPC32_TLSDESC, R_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC): Define. (R_386_NUM, R_X86_64_NUM): Adjust. * sysdeps/i386/Makefile (sysdep-dl-routines, sysdep_routines, systep-rtld-routines): Add tlsdesc and dl-tlsdesc for elf subdir. (gen-as-const-headers): Add tlsdesc.sym to csu subdir. * sysdeps/i386/dl-lookupcfg.h: New file. Introduce _dl_unmap to release tlsdesc_table. * sysdeps/i386/dl-machine.h: Include dl-tlsdesc.h. (elf_machine_type_class): Mark R_386_TLS_DESC as PLT class. (elf_machine_rel): Handle R_386_TLS_DESC. (elf_machine_rela): Likewise. (elf_machine_lazy_rel): Likewise. (elf_machine_lazy_rela): Likewise. * sysdeps/i386/dl-tls.h (struct dl_tls_index): Name it. * sysdeps/i386/dl-tlsdesc.S: New file. * sysdeps/i386/dl-tlsdesc.h: New file. * sysdeps/i386/tlsdesc.c: New file. * sysdeps/i386/tlsdesc.sym: New file. * sysdeps/i386/bits/linkmap.h (struct link_map_machine): Add tlsdesc_table. * sysdeps/x86_64/Makefile (sysdep-dl-routines, sysdep_routines, systep-rtld-routines): Add tlsdesc and dl-tlsdesc for elf subdir. (gen-as-const-headers): Add tlsdesc.sym to csu subdir. * sysdeps/x86_64/dl-lookupcfg.h: New file. Introduce _dl_unmap to release tlsdesc_table. * sysdeps/x86_64/dl-machine.h: Include dl-tlsdesc.h. (elf_machine_runtime_setup): Set up lazy TLSDESC GOT entry. (elf_machine_type_class): Mark R_X86_64_TLSDESC as PLT class. (elf_machine_rel): Handle R_X86_64_TLSDESC. (elf_machine_rela): Likewise. (elf_machine_lazy_rel): Likewise. * sysdeps/x86_64/dl-tls.h (struct dl_tls_index): Name it. (__tls_get_addr): Do not declare for non-shared compiles. * sysdeps/x86_64/dl-tlsdesc.S: New file. * sysdeps/x86_64/dl-tlsdesc.h: New file. * sysdeps/x86_64/tlsdesc.c: New file. * sysdeps/x86_64/tlsdesc.sym: New file. * sysdeps/x86_64/bits/linkmap.h (struct link_map_machine): Add tlsdesc_table for both 32- and 64-bit structs.
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-12 11:16:21 +0000