CET is only support for x86_64, this patch reverts:
- faaee1f07e x86: Support shadow stack pointer in setjmp/longjmp.
- be9ccd27c0 i386: Add _CET_ENDBR to indirect jump targets in
add_n.S/sub_n.S
- c02695d776 x86/CET: Update vfork to prevent child return
- 5d844e1b72 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.
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>
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
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
Save and restore shadow stack pointer in setjmp and longjmp to support
shadow stack in Intel CET. Use feature_1 in tcbhead_t to check if
shadow stack is enabled before saving and restoring shadow stack pointer.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* sysdeps/i386/__longjmp.S: Include <jmp_buf-ssp.h>.
(__longjmp): Restore shadow stack pointer if shadow stack is
enabled, SHADOW_STACK_POINTER_OFFSET is defined and __longjmp
isn't defined for __longjmp_cancel.
* sysdeps/i386/bsd-_setjmp.S: Include <jmp_buf-ssp.h>.
(_setjmp): Save shadow stack pointer if shadow stack is enabled
and SHADOW_STACK_POINTER_OFFSET is defined.
* sysdeps/i386/bsd-setjmp.S: Include <jmp_buf-ssp.h>.
(setjmp): Save shadow stack pointer if shadow stack is enabled
and SHADOW_STACK_POINTER_OFFSET is defined.
* sysdeps/i386/setjmp.S: Include <jmp_buf-ssp.h>.
(__sigsetjmp): Save shadow stack pointer if shadow stack is
enabled and SHADOW_STACK_POINTER_OFFSET is defined.
* sysdeps/unix/sysv/linux/i386/____longjmp_chk.S: Include
<jmp_buf-ssp.h>.
(____longjmp_chk): Restore shadow stack pointer if shadow stack
is enabled and SHADOW_STACK_POINTER_OFFSET is defined.
* sysdeps/unix/sysv/linux/x86/Makefile (gen-as-const-headers):
Remove jmp_buf-ssp.sym.
* sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S: Include
<jmp_buf-ssp.h>.
(____longjmp_chk): Restore shadow stack pointer if shadow stack
is enabled and SHADOW_STACK_POINTER_OFFSET is defined.
* sysdeps/x86/Makefile (gen-as-const-headers): Add
jmp_buf-ssp.sym.
* sysdeps/x86/jmp_buf-ssp.sym: New dummy file.
* sysdeps/x86_64/__longjmp.S: Include <jmp_buf-ssp.h>.
(__longjmp): Restore shadow stack pointer if shadow stack is
enabled, SHADOW_STACK_POINTER_OFFSET is defined and __longjmp
isn't defined for __longjmp_cancel.
* sysdeps/x86_64/setjmp.S: Include <jmp_buf-ssp.h>.
(__sigsetjmp): Save shadow stack pointer if shadow stack is
enabled and SHADOW_STACK_POINTER_OFFSET is defined.
* elf/rtld.c: Define __pointer_chk_guard_local and if necessary
__pointer_chk_guard.
(_rtld_global_ro): Initialize _dl_pointer_guard.
(dl_main): Initialize __pointer_chk_guard_local and either
__pointer_chk_guard or TLS value if necessary.
(process_envvars): Recognize and handle LD_POINTER_GUARD.
* sysdeps/generic/ldsodefs.h (rtld_global_ro): Add _dl_pointer_guard.
* sysdeps/i386/__longjmp.S: Use PTR_DEMANGLE for PC if defined.
* sysdeps/x86_64/__longjmp.S: Likewise.
* sysdeps/i386/bsd-_setjmp.S: Use PTR_MANGLE for PC if defined.
* sysdeps/i386/bsd-_setjmp.S: Likewise.
* sysdeps/i386/setjmp.S: Likewise.
[IS_IN_rtld]: Avoid call to __sigjmp_save.
* sysdeps/i386/setjmp.S: Likewise.
* sysdeps/unix/sysv/linux/i386/sysdep.h: Define PTR_MANGLE and
PTR_DEMANGLE.
* sysdeps/unix/sysv/linux/x86_64/sysdep.h: Likewise.
* sysdeps/i386/elf/setjmp.S: Removed.
* sysdeps/i386/elf/bsd-setjmp.S: Removed.
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.
1997-03-20 01:49 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/libm-ieee754/s_tanhl.c (__tanhl): Correct handling of
-inf.
* Makeconfig: (rpath-link): Add math/ directory.
(math-objdir): New variable.
(link-extra-lib): Define to special version when
$(common-objpfx)!=$(objpfx) to allow libraries outside
$(common-objpfx) be linked to the application.
* math/Makefile: Add rules to build and run test programs.
* math/libm-test.c (_GNU_SOURCE): Define only if still undefined.
(check_equal): Correct check for error.
(ceil_test): Fix typo.
(log_test): Fix typo.
(floor_test): Fix typo.
(pow_test): Fix typos.
(log10_test): Allow slight incorrectness for `log10(e)'.
(modf_test): New functions to test `modf' et.al.
(hypot_test): Rewrite test completely.
Patch partly by Andreas Jaeger.
* math/test-double.h (__NO_MATH_INLINES): Define only if not
already defined.
* math/test-float.h: Likewise.
* math/test-logdouble.h: Likewise.
* setjmp/setjmp.h: Change references of ANSI C to ISO C.
* setjmp/tst-setjmp.c: Correct and extend test suite.
* sysdeps/i386/__longjmp.S: Update copyright.
* sysdeps/i386/bsd-_setjmp.S: Correct fatal bug in jump to
`__sigsetjmp' in PIC code.
* sysdeps/i386/bsd-setjmp.S: Likewise.
* sysdeps/libm-i387/e_pow.S: Correct recognition of mantissa
overflow.
* sysdeps/libm-i387/e_powf.S: Likewise.
* sysdeps/libm-i387/s_expm1.S: Handle x == +-0 as a special
case since expm1(-0) == -0.
* sysdeps/libm-i387/s_expm1f.S: Likewise.
* sysdeps/libm-i387/s_expm1l.S: Likewise.
* sysdeps/libm-ieee754/s_modf.c: Optimize code by avoiding unneeded
access to FP number.
* sysdeps/libm-ieee754/s_modff.c: Likewise.
* sysdeps/libm-ieee754/s_modfl.c: Correct former completely bogus
code. It never worked correctly.
* sysdeps/libm-ieee754/s_tanh.c: Handle x == +-0 as a special
case since tanh(-0) == -0.
* sysdeps/libm-ieee754/s_tanhf.c: Likewise.
1997-03-19 21:13 Ulrich Drepper <drepper@cygnus.com>
* stdlib/strtod.c (STRTOL): Use wchar_t as type for `decimal' and
`thousands' to support systems with sizeof(wchar_t) !=
sizeof(wint_t). Blargh.
* sysdeps/unix/sysv/linux/socketbits.h: Remove definition of
SOL_IP, SOL_TCP, SOL_UDP, and SOL_IPX as they are defined in
appropriate headers.
* sysdeps/unix/sysv/linux/writev.c: Don't use MAX_IOVEC. Test for
UIO_FASTIOV and set to 8 if not available.
* sysdeps/unix/sysv/linux/readv.c: Likewise.
Patch by HJ Lu.
* sysdeps/unix/sysv/linux/xstat.c: Include <kernel_stat.h>, not
"kernel_stat.h".
* sysdeps/unix/sysv/linux/lxstat.c: Likewise.
* sysdeps/unix/sysv/linux/fxstat.c: Likewise.
Reported by fabsoft@fabsoft2.zarm.uni-bremen.de.
Tue Oct 22 21:38:21 1996 Ulrich Drepper <drepper@cygnus.com>
* version.h: Bump version number to 1.97.
* features.h: Undo change of Sun Oct 20 22:19:58 1996.
Include libc-version.h.
* features.h.in: Removed.
* Makefile: Change rules to generate libc-version.h instead of
features.h.
* malloc/free.c: Add cast to prevent warning.
* malloc/malloc-walk.c: Likewise.
* malloc/ralloc.c: Likewise.
* malloc/realloc.c: Likewise.
* grp/fgetgrent_r.c: Accept empty numeric field if name start with +
or -.
* pwd/fgetpwent_r.c: Likewise.
* nss/nss_files/files-grp.c: Don't accept entries with names starting
with + or - in lookup functions.
* nss/nss_files/files-pwd.c: Likewise.
* Makerules: Call autolock.sh using $(SHELL).
Mon Oct 21 22:52:16 1996 NIIBE Yutaka <gniibe@mri.co.jp>
* elf/dl-minimal.c: Don't define `dgettext' replacement but
`dcgettext'. When optimizing the macros in <libintl.h> define
`dgettext' as a macro and so this function will never be called.
Mon Oct 21 15:41:59 1996 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/i386/sysdep.h: Define END to use .size when available.
(PSEUDO_END): Use END.
* sysdeps/unix/sysv/linux/i386/sysdep.h: Define PSEUDO_END to
define SYSCALL_ERROR_HANDLER before using END.
(SYSCALL_ERROR_HANDLER): Don't use .size directive.
* sysdeps/unix/sysv/linux/clone.S: Don't use SYSCALL_ERROR_HANDLER
and .size directive but PSEUDO_END.
* sysdeps/unix/sysv/linux/mmap.S: Likewise.
* sysdeps/unix/sysv/linux/socket.S: Likewise.
* sysdeps/unix/sysv/linux/syscall.S: Likewise.
* sysdeps/unix/sysv/linux/sysdep.S (__errno_location): Use END.
* sysdeps/unix/i386/sysdep.S (__syscall_error): Likewise.
* sysdeps/i386/__longjmp.S: Use END instead of PSEUDO_END.
* sysdeps/i386/bsd-_setjmp.S: Likewise.
* sysdeps/i386/bsd-setjmp.S: Likewise.
* sysdeps/i386/memchr.S: Likewise.
* sysdeps/i386/memcmp.S: Likewise.
* sysdeps/i386/setjmp.S: Likewise.
* sysdeps/i386/stpcpy.S: Likewise.
* sysdeps/i386/stpncpy.S: Likewise.
* sysdeps/i386/strchr.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/i486/strcat.S: Likewise.
* sysdeps/i386/i486/strlen.S: Likewise.
* sysdeps/i386/i586/memset.S: Likewise.
* sysdeps/i386/i586/strchr.S: Likewise.
* sysdeps/i386/i586/strlen.S: Likewise.
* sysdeps/i386/strlen.c: De-ANSI-fy.
* sysdeps/generic/_strerror.c: Undo change of Mon Oct 21 01:32:36 1996.
Define dgettext if not defined to use dcgettext.
* sysdeps/mach/_strerror.c: Likewise.
* sysdeps/unix/sysv/i386/time.S: Add PSEUDO_END to get
__syscall_error defined..
Sat Oct 19 12:27:50 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/unix/sysv/linux/m68k/mmap.S: Fix braino: CALL_MCOUNT is
already included in the ENTRY macro. Remove SYSCALL_ERROR_HANDLER
now provided by PSEUDO_END.
* sysdeps/unix/sysv/linux/m68k/sigreturn.S: Likewise.
* sysdeps/unix/sysv/linux/m68k/socket.S: Likewise.
* sysdeps/unix/sysv/linux/m68k/syscall.S: Likewise.
* sysdeps/unix/sysv/linux/m68k/sysdep.S: Likewise.
* sysdeps/unix/sysv/linux/m68k/clone.S: Likewise. Use JUMPTARGET.
* sysdeps/generic/sysdep.h (END): Provide default empty
definition.
* sysdeps/unix/sysv/linux/m68k/sysdep.h (END): Redefine to use
size directive.
(PSEUDO): Don't include SYSCALL_ERROR_HANDLER.
(PSEUDO_END): Include it here instead.
(SYSCALL_ERROR_HANDLER): Remove type directive.
* sysdeps/m68k/bsd-_setjmp.S: Use END, not PSEUDO_END.
* sysdeps/m68k/bsd-setjmp.S: Likewise.
* sysdeps/unix/sysv/linux/m68k/sigreturn.S: Likewise.
* sysdeps/unix/sysv/linux/m68k/sysdep.S: Likewise.
(__syscall_error): Can't use ENTRY macro.
Sat Oct 19 12:13:24 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/unix/sysv/linux/syscalls.list (getresuid, setresuid):
Set caller to EXTRA.
O_SHLOCK.
Tue Oct 15 14:37:40 1996 Thomas Bushnell, n/BSG <thomas@gnu.ai.mit.edu>
* sysdeps/mach/hurd/fcntlbits.h (O_HURD): Add O_EXLOCK and
