Now the ARM port implements pointer encryption for jmpbufs, gdb needs
a SystemTap probe point in longjmp to determine the target PC of
a call to longjmp. This patch implements the probe point in longjmp
and a similar probe point in setjmp.
In order to have all the appropriate registers available to pass to the
probe this reorders the layout of jmpbuf, putting the sp and lr registers
at the start rather than the end, allowing them to be read and
written sequentially.
Tested on armv7, no new failures in the glibc testsuite and confirmed
that this fixes the gdb.base/longjmp.exp failures in the gdb testsuite.
ChangeLog:
2014-02-25 Will Newton <will.newton@linaro.org>
* sysdeps/arm/__longjmp.S: Include stap-probe.h.
(__longjmp): Restore sp and lr before restoring callee
saved registers. Add longjmp and longjmp_target
SystemTap probe point.
* sysdeps/arm/bits/setjmp.h (__jmp_buf): Update comment.
* sysdeps/arm/include/bits/setjmp.h (__JMP_BUF_SP):
Define to zero to match jmpbuf layout.
* sysdeps/arm/setjmp.S: Include stap-probe.h.
(__sigsetjmp): Save sp and lr before saving callee
saved registers. Add setjmp SystemTap probe point.
I've moved the ARM port from ports to the main sysdeps hierarchy.
Beyond the README update, the move of the files was simply
git mv ports/sysdeps/arm sysdeps/arm
git mv ports/sysdeps/unix/arm sysdeps/unix/arm
git mv ports/sysdeps/unix/sysv/linux/arm sysdeps/unix/sysv/linux/arm
and in addition to the ChangeLog entries here, I put a note at the top
of ports/ChangeLog.arm similar to that at the top of
ChangeLog.powerpc. There is deliberately no NEWS change, as I think
it makes the most sense to put in a general note above all ports
having moved if we can achieve that for 2.20.
Tested that disassembly of installed shared libraries for arm is the
same before and after this patch, except for data (not instructions)
in ld.so (there are assertions in sysdeps/arm/dl-machine.h, and the
path by which that file is found, and so by which it appears in the
assertion message, changes as a result of the move).
* sysdeps/arm: Move directory from ports/sysdeps/arm.
* sysdeps/unix/arm: Move directory from ports/sysdeps/unix/arm.
* sysdeps/unix/sysv/linux/arm: Move directory from
ports/sysdeps/unix/sysv/linux/arm.
* README: Update listing for arm-*-linux-gnueabi.
ports/ChangeLog.arm:
* sysdeps/arm: Move directory to ../sysdeps/arm.
* sysdeps/unix/arm: Move directory to ../sysdeps.arm.
* sysdeps/unix/sysv/linux/arm: Move directory to
../sysdeps/unix/sysv/linux/arm.
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.
1998-08-20 16:01 Ulrich Drepper <drepper@cygnus.com>
* elf/ldd.sh.in: Redirect warnings and error messages to stderr.
* elf/ldd.bash.in: Likewise.
* elf/sln.c: Avoid warning for no main prototype.
* sysdeps/unix/sysv/linux/alpha/bits/fcntl.h: Remove O_READ and
O_WRITE.
* sysdeps/unix/sysv/linux/mips/bits/fcntl.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/fcntl.h: Likewise.
* sysdeps/unix/sysv/linux/alpha/bits/fcntl.h: Add F_SETSIG and
F_GETSIG.
* sysdeps/unix/sysv/linux/bits/fcntl.h: Likewise.
* sysdeps/unix/sysv/linux/mips/bits/fcntl.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/fcntl.h: Likewise.
1998-08-20 Philip Blundell <pb@nexus.co.uk>
* sysdeps/arm/fpu/ieee754.h: Move to...
* sysdeps/arm/ieee754.h: ... here.
* sysdeps/arm/__longjmp.S: Put return value in correct register.
Don't set the condition flags unnecessarily.
* sysdeps/arm/fpu/__longjmp.S: Likewise. Restore floating point
registers correctly.
* sysdeps/arm/dl-machine.h: Fix problems with profiling code
(patch from Scott Bambrough).
* sysdeps/arm/sysdep.h (CALL_MCOUNT): Add missing semicolons.
* csu/initfini.c (_init): Don't check whether __gmon_start__ is
NULL, just call it unconditionally.
(__gmon_start__): Provide stub version as a weak symbol.
1998-07-30 Philip Blundell <philb@gnu.org>
* sysdeps/unix/sysv/linux/arm/init-first.h: New file (from patch
by Scott Bambrough)
* sysdeps/unix/sysv/linux/arm/errlist.c: New file; ARM tools don't
like `@' in .type directives.
* sysdeps/arm/bsd-setjmp.S: Use PLT for procedure call.
* sysdeps/arm/bsd-_setjmp.S: Likewise.
* sysdeps/arm/dl-machine.h: Set __libc_stack_end.
1998-08-20 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* sysdeps/unix/sysv/linux/mips/bits/fcntl.h (F_SETOWN): Correct value.
(F_GETOWN): Likewise.
* sysdeps/unix/sysv/linux/bits/siginfo.h (SI_SIGIO): Add it (from
Linux 2.1.117).
1998-08-20 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/generic/glob.c [_LIBC]: Define __stat only if not
already defined.
1998-08-14 Thorsten Kukuk <kukuk@vt.uni-paderborn.de>
* nis/nss_compat/compat-grp.c: Set errno to ENOENT if we have no
more entries.
* nis/nss_compat/compat-initgroups.c: Likewise.
* nis/nss_compat/compat-pwd.c: Likewise.
* nis/nss_compat/compat-spwd.c: Likewise.
* nis/nss_nis/nis-alias.c: Likewise.
* nis/nss_nis/nis-ethers.c: Likewise.
* nis/nss_nis/nis-grp.c: Likewise.
* nis/nss_nis/nis-hosts.c: Likewise.
* nis/nss_nis/nis-initgroups.c: Likewise.
* nis/nss_nis/nis-network.c: Likewise.
* nis/nss_nis/nis-proto.c: Likewise.
* nis/nss_nis/nis-pwd.c: Likewise.
* nis/nss_nis/nis-rpc.c: Likewise.
* nis/nss_nis/nis-service.c: Likewise.
* nis/nss_nis/nis-spwd.c: Likewise.
* nis/rpcsvc/yp.h: Generate new without 1024 byte limits.
* nis/ypclnt.c: Try binding dir only first time, could be to old.
* nis/yp_xdr.c: Remove 1024 byte limit.
* nis/ypupdate_xdr.c: Likewise.
* nis/nss_nis/nis-publickey.c: Make sure, nobody could send
wrong data.
1998-03-18 14:25 Ulrich Drepper <drepper@cygnus.com>
* string/bits/string2.h: Add optimization for strdup.
Always define __strsep and __strtok_r and make real names available
when feature select macros are defined.
1998-03-18 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* manual/install.texi (Installation): Use i486-linux as example
instead of the unsupported sunos4.
(Reporting Bugs): Mention glibcbug script.
(Tools for Installation): gcc 2.8.1/egcs 1.0.2 is required.
1998-03-16 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* posix/wordexp-tst.sh: Make portable. Add more tests.
* posix/Makefile (do-globtest do-wordexp-test): New targets.
1998-03-18 13:38 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/unix/sysv/linux/libc-start.c: Moved to ...
* sysdeps/generic/libc-start.c: ...here, replacing former content.
* sysdeps/unix/sysv/linux/Dist: Add netash/ash.h and
netpacket/packet.h.
* sysdeps/unix/sysv/linux/bits/socket.h: Pretty print.
1998-03-17 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/unix/sysv/linux/bits/resource.h: Remove trailing comma
in enumerator for strict standard compliance.
* sysdeps/generic/bits/resource.h: Likewise.
1998-03-18 10:04 Philip Blundell <pb@nexus.co.uk>
* sysdeps/arm/sysdep.h (__ARM_USES_FP): Deleted.
(PLTJMP): New macro.
* sysdeps/arm/fpu/__longjmp.S: New file, implementation of
longjmp() when floating point enabled.
* sysdeps/arm/fpu/setjmp.S: Likewise for setjmp().
* sysdeps/arm/__longjmp.S: Remove floating point code.
* sysdeps/arm/setjmp.S: Likewise.
* sysdeps/arm/bsd-setjmp.S: Call __sigsetjmp by correct name.
* sysdeps/arm/bsd-_setjmp.S: Likewise.
* sysdeps/arm/memset.S: New file; optimised ARM implementation of
memset().
* sysdeps/generic/setsockopt.c (setsockopt): Keep in step with
prototype.
1998-03-17 16:16 Philip Blundell <pb@nexus.co.uk>
Based on patches from Pat Beirne and Scott Bambrough:
* sysdeps/arm/__longjmp.S: Use ip, not r2, as temporary.
* sysdeps/arm/bits/fenv.h: New file.
* sysdeps/arm/dl-machine.h: New file. Add ELF support.
* sysdeps/arm/elf/setjmp.S: Likewise.
* sysdeps/arm/elf/start.S: Likewise.
* sysdeps/arm/init-first.c: Likewise.
* sysdeps/arm/setjmp.S: Call __sigjmp_save through PLT
* sysdeps/arm/sysdep.h: Change format of .type directive. Correct
comment about floating point to reflect current reality.
* sysdeps/unix/arm/brk.S: Support PIC.
* sysdeps/unix/arm/sysdep.S (syscall_error): Support PIC and
re-entrant code.
* sysdeps/unix/sysv/linux/arm/socket.S: Check correctly for error
return; call syscall_error through PLT.
* sysdeps/unix/sysv/linux/arm/sysdep.h (ENTRY): Correct error jump.
1998-03-04 12:01 Philip Blundell <pb@nexus.co.uk>
* sysdeps/unix/sysv/linux/netpacket/packet.h: New file.
* sysdeps/unix/sysv/linux/netash/ash.h: Likewise.
* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Install them.
1997-04-15 03:14 Ulrich Drepper <drepper@cygnus.com>
* wcsmbs/wcsstr.c: Add weak alias wcswcs for Unix98 compliance.
* math/Makefile (libm-calls): Add s_sincos and s_cproj.
* math/mathcalls.h: Add prototype for sincos.
* sysdeps/i386/fpu/__math.h: Warn about restriction on arguments to
inlined sin and cos function.
Define functions new in ISO C 9X when __USE_ISOC9X is defined.
Add optimized version of finite.
Rewrite sincos function to handle too large arguments.
* sysdeps/libm-i387/s_cos.S: Better code alignment.
* sysdeps/libm-i387/s_cosl.S: Likewise.
* sysdeps/libm-i387/s_sin.S: Likewise.
* sysdeps/libm-i387/s_sinl.S: Likewise.
* sysdeps/libm-i387/s_finite.S: Yet better code.
* sysdeps/libm-i387/s_finitef.S: Likewise.
* sysdeps/libm-i387/s_sincos.S: New file.
* sysdeps/libm-i387/s_sincosf.S: New file.
* sysdeps/libm-i387/s_sincosl.S: New file.
* sysdeps/libm-ieee754/s_sincos.c: New file.
* sysdeps/libm-ieee754/s_sincosf.c: New file.
* sysdeps/libm-ieee754/s_sincosl.c: New file.
* sysdeps/libm-ieee754/s_ccosh.c: Change to use sincos function.
* sysdeps/libm-ieee754/s_ccoshf.c: Likewise.
* sysdeps/libm-ieee754/s_ccoshl.c: Likewise.
* sysdeps/libm-ieee754/s_cexp.c: Likewise.
* sysdeps/libm-ieee754/s_cexpf.c: Likewise.
* sysdeps/libm-ieee754/s_cexpl.c: Likewise.
* sysdeps/libm-ieee754/s_csinh.c: Likewise.
* sysdeps/libm-ieee754/s_csinhf.c: Likewise.
* sysdeps/libm-ieee754/s_csinhl.c: Likewise.
* sysdeps/libm-ieee754/s_ctan.c: Likewise.
* sysdeps/libm-ieee754/s_ctanf.c: Likewise.
* sysdeps/libm-ieee754/s_ctanl.c: Likewise.
* sysdeps/libm-ieee754/s_ctanh.c: Likewise.
* sysdeps/libm-ieee754/s_ctanhf.c: Likewise.
* sysdeps/libm-ieee754/s_ctanhl.c: Likewise.
* sysdeps/libm-ieee754/s_cosl.c: Correct check for range.
* sysdeps/libm-ieee754/s_sinl.c: Likewise.
* sysdeps/libm-ieee754/s_roundtol.c: Fix typos.
* sysdeps/libm-ieee754/s_roundtoll.c: Likewise.
* nis/Makefile (services): Mention nisplus before compat.
* nis/nis_call.c (__do_niscall): Change type of variable server_len
to prevent warning.
* nis/nss_compat/compat-grp.c (getgrent_next_file_plusgroup): Add
cast to prevent warning.
* nis/nss_compat/compat-pwd.c (getpwent_next_file_plususer): Likewise.
* nis/nss_compat/compat-spwd.c (getspent_next_file_plususer): Likewise.
* nis/nss_nisplus/nisplus-hosts.c (_nss_nisplus_parse_hostent): Change
type of variable `i' to prevent warning.
* nis/nss_nisplus/nisplus-network.c (_nss_nisplus_parse_netent):
Likewise.
* nis/nss_nisplus/nisplus-proto.c (_nss_nisplus_parse_protoent):
Likewise.
* nis/nss_nisplus/nisplus-rpc.c (_nss_nisplus_parse_rpcent): Likewise.
* nis/nss_nisplus/nisplus-service.c (_nss_nisplus_parse_servent):
Likewise.
* sysdeps/generic/Dist: Remove old math implementation files.
* sysdeps/generic/mathimpl.h: Removed.
* sysdeps/generic/trig.h: Removed.
* sysdeps/generic/sincos.c: Removed.
* sysdeps/generic/asincos.c: Removed.
* sysdeps/generic/exp__E.c: Removed.
* sysdeps/generic/log__L.c: Removed.
1997-04-13 17:18 Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>
* malloc/malloc.c (fREe): Small optimization. Before returning,
add fast check whether the heap containing top can go away.
1997-04-11 16:46 Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>
* malloc/malloc.c (mALLOc, rEALLOc, cALLOc, mEMALIGn): When
failing to allocate a new chunk, also try the main_arena. It may
be that we are only running out of mmapped regions, and other
arenas cannot be enlarged sufficiently.
(new_heap, malloc_extend_top): Handle top_pad more consistently,
i.e. only in new_heap().
1997-04-13 21:10 Philip Blundell <pjb27@cl.cam.ac.uk>
* sysdeps/posix/Makefile: Don't try to build and run mk-stdiolim
if cross-compiling.
* configure.in: Recognise "...linuxaout" OS names and turn off ELF.
* configure.in: Add ARM support.
* sysdeps/arm/Implies: New file.
* sysdeps/arm/__longjmp.S: New file.
* sysdeps/arm/bsd-_setjmp: New file.
* sysdeps/arm/bsd-setjmp: New file.
* sysdeps/arm/bytesex.h: New file.
* sysdeps/arm/fpu_control.h: New file.
* sysdeps/arm/jmp_buf.h: New file.
* sysdeps/arm/setjmp.h: New file.
* sysdeps/arm/sysdep.h: New file.
* sysdeps/unix/arm/config.h: New file.
1997-04-14 04:03 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/libm-ieee754/s_cproj.c: New file.
* sysdeps/libm-ieee754/s_cprojf.c: New file.
* sysdeps/libm-ieee754/s_cprojl.c: New file.
Roland McGrath