aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/unix/sysv/linux/i386/setcontext.S
AgeCommit message (Collapse)Author
2024-01-09i386: Remove CET supportAdhemerval Zanella
CET is only support for x86_64, this patch reverts: - faaee1f07ed x86: Support shadow stack pointer in setjmp/longjmp. - be9ccd27c09 i386: Add _CET_ENDBR to indirect jump targets in add_n.S/sub_n.S - c02695d7764 x86/CET: Update vfork to prevent child return - 5d844e1b725 i386: Enable CET support in ucontext functions - 124bcde683 x86: Add _CET_ENDBR to functions in crti.S - 562837c002 x86: Add _CET_ENDBR to functions in dl-tlsdesc.S - f753fa7dea x86: Support IBT and SHSTK in Intel CET [BZ #21598] - 825b58f3fb i386-mcount.S: Add _CET_ENDBR to _mcount and __fentry__ - 7e119cd582 i386: Use _CET_NOTRACK in i686/memcmp.S - 177824e232 i386: Use _CET_NOTRACK in memcmp-sse4.S - 0a899af097 i386: Use _CET_NOTRACK in memcpy-ssse3-rep.S - 7fb613361c i386: Use _CET_NOTRACK in memcpy-ssse3.S - 77a8ae0948 i386: Use _CET_NOTRACK in memset-sse2-rep.S - 00e7b76a8f i386: Use _CET_NOTRACK in memset-sse2.S - 90d15dc577 i386: Use _CET_NOTRACK in strcat-sse2.S - f1574581c7 i386: Use _CET_NOTRACK in strcpy-sse2.S - 4031d7484a i386/sub_n.S: Add a missing _CET_ENDBR to indirect jump - target - Checked on i686-linux-gnu.
2024-01-01Update copyright dates with scripts/update-copyrightsPaul Eggert
2023-01-06Update copyright dates with scripts/update-copyrightsJoseph Myers
2022-01-01Update copyright dates with scripts/update-copyrightsPaul Eggert
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
2021-09-03Remove "Contributed by" linesSiddhesh Poyarekar
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2021-01-02Update copyright dates with scripts/update-copyrightsPaul Eggert
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
2020-02-14i386: Enable CET support in ucontext functionsH.J. Lu
1. getcontext and swapcontext are updated to save the caller's shadow stack pointer and return address. 2. setcontext and swapcontext are updated to restore shadow stack and jump to new context directly. 3. makecontext is updated to allocate a new shadow stack and set the caller's return address to the helper code, L(exitcode). 4. Since we no longer save and restore EAX, ECX and EDX in getcontext, setcontext and swapcontext, we can use them as scratch register slots to enable CET in ucontext functions. Since makecontext allocates a new shadow stack when making a new context and kernel allocates a new shadow stack for clone/fork/vfork syscalls, we track the current shadow stack base. In setcontext and swapcontext, if the target shadow stack base is the same as the current shadow stack base, we unwind the shadow stack. Otherwise it is a stack switch and we look for a restore token. We enable shadow stack at run-time only if program and all used shared objects, including dlopened ones, are shadow stack enabled, which means that they must be compiled with GCC 8 or above and glibc 2.28 or above. We need to save and restore shadow stack only if shadow stack is enabled. When caller of getcontext, setcontext, swapcontext and makecontext is compiled with smaller ucontext_t, shadow stack won't be enabled at run-time. We check if shadow stack is enabled before accessing the extended field in ucontext_t. Tested on i386 CET/non-CET machines. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2020-02-01i386: Don't unnecessarily save and restore EAX, ECX and EDX [BZ# 25262]H.J. Lu
On i386, since EAX, ECX and EDX are caller-saved, there are no need to save and restore EAX, ECX and EDX in getcontext, setcontext and swapcontext. They just need to clear EAX on success. The extra scratch registers are needed to enable CET. Tested on i386. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2020-01-01Update copyright dates with scripts/update-copyrights.Joseph Myers
2019-09-07Prefer https to http for gnu.org and fsf.org URLsPaul Eggert
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
2019-01-01Update copyright dates with scripts/update-copyrights.Joseph Myers
* 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.
2018-01-01Update copyright dates with scripts/update-copyrights.Joseph Myers
* 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.
2017-01-01Update copyright dates with scripts/update-copyrights.Joseph Myers
2016-01-04Update copyright dates with scripts/update-copyrights.Joseph Myers
2015-08-19Call __setcontext with HIDDEN_JUMPTARGETH.J. Lu
i386 __makecontext should call __setcontext with HIDDEN_JUMPTARGET. [BZ #18822] * sysdeps/unix/sysv/linux/i386/makecontext.S (__makecontext): Don't load %ebx when calling __setcontext. Call __setcontext with HIDDEN_JUMPTARGET. * sysdeps/unix/sysv/linux/i386/setcontext.S (__setcontext): Add libc_hidden_def.
2015-01-02Update copyright dates with scripts/update-copyrights.Joseph Myers
2014-01-01Update copyright notices with scripts/update-copyrightsAllan McRae
2013-01-02Update copyright notices with scripts/update-copyrights.Joseph Myers
2012-07-25Remove unused pseudo_end labelAndreas Schwab
2012-02-09Replace FSF snail mail address with URLs.Paul Eggert
2005-05-26Add space inf weak_alias use.Ulrich Drepper
2005-05-04* intl/Makefile (tst-gettext[45].out): Pass also $(run-program-prefix)cvs/fedora-glibc-20050504T1818Ulrich Drepper
as argument to the scripts. * intl/tst-gettext2.sh: Use mkdir -p instead of test -d + mkdir. * intl/tst-gettext4.sh: Likewise. Use run_program_prefix argument. * intl/tst-gettext5.sh: Likewise. * intl/tst-translit.sh: Add mkdir -p. * sysdeps/unix/sysv/linux/i386/sysdep.h (SETUP_PIC_REG): Use .ifndef/.endif to allow use of this macro more than once per .S file. (LOAD_PIC_REG): New macro. * sysdeps/unix/sysv/linux/i386/makecontext.S: Add call frame information. * sysdeps/unix/sysv/linux/i386/getcontext.S: Likewise. * sysdeps/unix/sysv/linux/i386/vfork.S: Likewise. * sysdeps/i386/fpu/s_asinh.S: Use LOAD_PIC_REG macro. Add call frame information. * sysdeps/i386/fpu/e_log10f.S: Likewise. * sysdeps/i386/fpu/s_expm1.S: Likewise. * sysdeps/i386/fpu/e_acoshf.S: Likewise. * sysdeps/i386/fpu/e_log2l.S: Likewise. * sysdeps/i386/fpu/s_log1pf.S: Likewise. * sysdeps/i386/fpu/s_lrint.S: Likewise. * sysdeps/i386/fpu/s_llrint.S: Likewise. * sysdeps/i386/fpu/s_ilogbf.S: Likewise. * sysdeps/i386/fpu/s_cbrtl.S: Likewise. * sysdeps/i386/fpu/s_asinhf.S: Likewise. * sysdeps/i386/fpu/e_log.S: Likewise. * sysdeps/i386/fpu/e_atanhf.S: Likewise. * sysdeps/i386/fpu/s_lrintl.S: Likewise. * sysdeps/i386/fpu/e_atanhl.S: Likewise. * sysdeps/i386/fpu/e_scalb.S: Likewise. * sysdeps/i386/fpu/s_log1p.S: Likewise. * sysdeps/i386/fpu/s_nearbyintl.S: Likewise. * sysdeps/i386/fpu/s_frexpl.S: Likewise. * sysdeps/i386/fpu/s_log1pl.S: Likewise. * sysdeps/i386/fpu/s_nearbyintf.S: Likewise. * sysdeps/i386/fpu/s_cbrt.S: Likewise. * sysdeps/i386/fpu/s_expm1l.S: Likewise. * sysdeps/i386/fpu/s_lrintf.S: Likewise. * sysdeps/i386/fpu/e_acosh.S: Likewise. * sysdeps/i386/fpu/s_cexp.S: Likewise. * sysdeps/i386/fpu/s_ilogbl.S: Likewise. * sysdeps/i386/fpu/s_expm1f.S: Likewise. * sysdeps/i386/fpu/e_powl.S: Likewise. * sysdeps/i386/fpu/e_powf.S: Likewise. * sysdeps/i386/fpu/e_scalbf.S: Likewise. * sysdeps/i386/fpu/e_logl.S: Likewise. * sysdeps/i386/fpu/e_acoshl.S: Likewise. * sysdeps/i386/fpu/s_frexp.S: Likewise. * sysdeps/i386/fpu/e_pow.S: Likewise. * sysdeps/i386/fpu/e_logf.S: Likewise. * sysdeps/i386/fpu/e_log2.S: Likewise. * sysdeps/i386/fpu/s_frexpf.S: Likewise. * sysdeps/i386/fpu/s_cexpl.S: Likewise. * sysdeps/i386/fpu/s_llrintf.S: Likewise. * sysdeps/i386/fpu/s_ilogb.S: Likewise. * sysdeps/i386/fpu/e_scalbl.S: Likewise. * sysdeps/i386/fpu/e_atanh.S: Likewise. * sysdeps/i386/fpu/e_log10.S: Likewise. * sysdeps/i386/fpu/s_cbrtf.S: Likewise. * sysdeps/i386/fpu/s_cexpf.S: Likewise. * sysdeps/i386/fpu/s_llrintl.S: Likewise. * sysdeps/i386/fpu/e_log10l.S: Likewise. * sysdeps/i386/fpu/s_nearbyint.S: Likewise. * sysdeps/i386/fpu/s_asinhl.S: Likewise. * sysdeps/i386/fpu/e_log2f.S: Likewise. * sysdeps/i386/addmul_1.S: Various fixes to cfi handling. * sysdeps/i386/mul_1.S: Likewise. * sysdeps/i386/strtok.S: Likewise. * sysdeps/i386/sub_n.S: Likewise. * sysdeps/i386/submul_1.S: Likewise. * sysdeps/i386/i586/addmul_1.S: Likewise. * sysdeps/i386/i586/memcpy.S: Likewise. * sysdeps/i386/i586/mul_1.S: Likewise. * sysdeps/i386/i586/rshift.S: Likewise. * sysdeps/i386/i586/sub_n.S: Likewise. * sysdeps/i386/i586/submul_1.S: Likewise. * sysdeps/i386/i686/memcmp.S: Likewise. * sysdeps/i386/i686/memmove.S: Likewise. * sysdeps/unix/sysv/linux/i386/clone.S: Likewise. * sysdeps/unix/sysv/linux/i386/mmap.S: Likewise. * sysdeps/unix/sysv/linux/i386/mmap64.S: Likewise. * sysdeps/unix/sysv/linux/i386/setcontext.S: Likewise.
2005-05-04* sysdeps/i386/add_n.S: Add call frame information.cvs/fedora-glibc-20050504T0728Ulrich Drepper
* sysdeps/i386/addmul_1.S: Likewise. * sysdeps/i386/bsd-setjmp.S: Likewise. * sysdeps/i386/lshift.S: Likewise. * sysdeps/i386/memchr.S: Likewise. * sysdeps/i386/memcmp.S: Likewise. * sysdeps/i386/mul_1.S: Likewise. * sysdeps/i386/rawmemchr.S: Likewise. * sysdeps/i386/rshift.S: Likewise. * sysdeps/i386/stpncpy.S: Likewise. * sysdeps/i386/strchr.S: Likewise. * sysdeps/i386/strchrnul.S: Likewise. * sysdeps/i386/strcspn.S: Likewise. * sysdeps/i386/strpbrk.S: Likewise. * sysdeps/i386/strrchr.S: Likewise. * sysdeps/i386/strspn.S: Likewise. * sysdeps/i386/strtok.S: Likewise. * sysdeps/i386/sub_n.S: Likewise. * sysdeps/i386/submul_1.S: Likewise. * sysdeps/i386/elf/bsd-setjmp.S: Likewise. * sysdeps/i386/i486/strcat.S: Likewise. * sysdeps/i386/i586/add_n.S: Likewise. * sysdeps/i386/i586/addmul_1.S: Likewise. * sysdeps/i386/i586/lshift.S: Likewise. * sysdeps/i386/i586/memcpy.S: Likewise. * sysdeps/i386/i586/memset.S: Likewise. * sysdeps/i386/i586/mul_1.S: Likewise. * sysdeps/i386/i586/rshift.S: Likewise. * sysdeps/i386/i586/strchr.S: Likewise. * sysdeps/i386/i586/strcpy.S: Likewise. * sysdeps/i386/i586/sub_n.S: Likewise. * sysdeps/i386/i586/submul_1.S: Likewise. * sysdeps/i386/i686/add_n.S: Likewise. * sysdeps/i386/i686/memcmp.S: Likewise. * sysdeps/i386/i686/memmove.S: Likewise. * sysdeps/i386/i686/mempcpy.S: Likewise. * sysdeps/i386/i686/memset.S: Likewise. * sysdeps/i386/i686/strtok.S: Likewise. * sysdeps/unix/sysv/linux/i386/clone.S: Likewise. * sysdeps/unix/sysv/linux/i386/mmap.S: Likewise. * sysdeps/unix/sysv/linux/i386/mmap64.S: Likewise. * sysdeps/unix/sysv/linux/i386/posix_fadvise64.S: Likewise. * sysdeps/unix/sysv/linux/i386/semtimedop.S: Likewise. * sysdeps/unix/sysv/linux/i386/setcontext.S: Likewise. * sysdeps/i386/fpu/libm-test-ulps: Adjust for gcc 4.
2004-12-22(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.Ulrich Drepper
2007-07-122.5-18.1Jakub Jelinek
2003-04-05Update.Ulrich Drepper
2003-04-05 Roland McGrath <roland@redhat.com> * sysdeps/unix/sysv/linux/i386/setcontext.S: Rewrite to avoid writing below the stack pointer even if switching to the same context we are running right now. * catgets/gencat.c (read_input_file): Make sure that \n is not alone on the line before testing for continuation. * math/test-tgmath.c (compile_test): Initialize c.
2002-12-20Update.Ulrich Drepper
* sysdeps/unix/sysv/linux/i386/pthread_once.S: Use ENTER_KERNEL instead of int $0x80. * sysdeps/unix/sysv/linux/i386/i486/libc-lowlevellock.S: Likewise. * sysdeps/unix/sysv/linux/i386/i486/libc-lowlevelmutex.S: Likewise. * sysdeps/unix/sysv/linux/i386/i486/lowlevelcond.S: Likewise. * sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S: Likewise. * sysdeps/unix/sysv/linux/i386/i486/lowlevelmutex.S: Likewise. * sysdeps/unix/sysv/linux/i386/i486/lowlevelrwlock.S: Likewise. * sysdeps/unix/sysv/linux/i386/i486/lowlevelsem.S: Likewise. * sysdeps/unix/sysv/linux/i386/i486/pthread_barrier_wait.S: Likewise. * sysdeps/unix/sysv/linux/i386/lowlevellock.h: Add support for using sysenter. * sysdeps/unix/sysv/linux/i386/lowlevelsem.h: Likewise. * sysdeps/i386/tls.h: Unconditionally include <dl-sysdep.h>.
2001-07-31Update.Ulrich Drepper
* sysdeps/unix/sysv/linux/i386/getcontext.S: Don't touch the %gs register so that contexts can be used in different threads. * sysdeps/unix/sysv/linux/i386/setcontext.S: Likewise. * sysdeps/unix/sysv/linux/i386/swapcontext.S: Likewise.
2001-07-06Update to LGPL v2.1.Andreas Jaeger
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
2001-04-07Update.Ulrich Drepper
2001-04-07 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/i386/getcontext.S: New file. * sysdeps/unix/sysv/linux/i386/setcontext.S: New file. * sysdeps/unix/sysv/linux/i386/makecontext.S: New file. * sysdeps/unix/sysv/linux/i386/swapcontext.S: New file. * sysdeps/unix/sysv/linux/i386/ucontext_i.h: New file. * sysdeps/unix/sysv/linux/i386/Dist: Add ucontext_i.h.
generated by cgit v1.2.3-70-g09d2 (git 2.48.1) at 2025-04-06 01:16:33 +0000