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glibc/sysdeps/unix/sysv/linux/i386
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H.J. Lu 086df229ee i386: Add <startup.h> [BZ #21913] 
On Linux/i386, there are 3 ways to make a system call:

1. call *%gs:SYSINFO_OFFSET.  This requires TLS initialization.
2. call *_dl_sysinfo.  This requires relocation of _dl_sysinfo.
3. int $0x80.  This is slower than #2 and #3, but works everywhere.

When an object file is compiled with PIC, #1 is prefered since it is
faster than #3 and doesn't require relocation of _dl_sysinfo.  For
dynamic executables, ld.so initializes TLS.  However, for static
executables, before TLS is initialized by __libc_setup_tls, #3 should
be used for system calls.

This patch adds <startup.h> which defines _startup_fatal and defaults
it to __libc_fatal.  It replaces __libc_fatal with _startup_fatal in
static executables where it is called before __libc_setup_tls is called.
This header file is included in all files containing functions which are
called before __libc_setup_tls is called.  On Linux/i386, when PIE is
enabled by default, _startup_fatal is turned into ABORT_INSTRUCTION and
I386_USE_SYSENTER is defined to 0 so that "int $0x80" is used for system
calls before __libc_setup_tls is called.

Tested on i686 and x86-64.  Without this patch, all statically-linked
tests will fail on i686 when the compiler defaults to -fPIE.

	[BZ #21913]
	* csu/libc-tls.c: Include <startup.h> first.
	(__libc_setup_tls): Call _startup_fatal instead of __libc_fatal.
	* elf/dl-tunables.c: Include <startup.h> first.
	* include/libc-symbols.h (BUILD_PIE_DEFAULT): New.
	* sysdeps/generic/startup.h: New file.
	* sysdeps/unix/sysv/linux/i386/startup.h: Likewise.
	* sysdeps/unix/sysv/linux/i386/brk.c [BUILD_PIE_DEFAULT != 0]
	(I386_USE_SYSENTER): New.  Defined to 0.
2017-08-08 08:43:15 -07:00
..
i686 Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
i786 Move remaining nptl/sysdeps/unix/sysv/linux/i386/ files. 2014-05-14 13:37:40 -07:00
____longjmp_chk.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
_exit.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
alphasort64.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
arch-fork.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
brk.c i386: Add <startup.h> [BZ #21913] 2017-08-08 08:43:15 -07:00
c++-types.data x86: Move abilist files out of nptl/ subdirectories. 2014-05-14 15:45:23 -07:00
clone.S Call exit directly in clone (BZ #21512) 2017-06-26 17:52:20 -03:00
configure Require Linux kernel 3.2 or later on x86 / x86_64. 2017-05-08 10:45:20 +00:00
configure.ac Require Linux kernel 3.2 or later on x86 / x86_64. 2017-05-08 10:45:20 +00:00
dl-librecon.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-procinfo.h Add include guards to dl-procinfo.h 2017-06-07 11:11:38 +05:30
dl-sysdep.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fxstat.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fxstatat.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
get_clockfreq.c Narrowing the visibility of libc-internal.h even further. 2017-03-01 20:33:46 -05:00
getcontext.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getdents64.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getmsg.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
gettimeofday.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
glob64.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Implies NPTL is no longer an add-on! 2014-07-07 09:29:06 -07:00
init-first.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
kernel-features.h Simplify accept4, recvmmsg, sendmmsg code. 2017-05-09 21:59:36 +00:00
ld.abilist ld.so: Remove __libc_memalign 2016-11-30 16:23:58 +01:00
ldconfig.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
libanl.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
libBrokenLocale.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
libc-do-syscall.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
libc-lowlevellock.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
libc.abilist Add float128 support for x86_64, x86. 2017-06-26 22:02:24 +00:00
libcrypt.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
libdl.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
libm.abilist Add float128 support for x86_64, x86. 2017-06-26 22:02:24 +00:00
libnsl.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
libpthread.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
libresolv.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
librt.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
libthread_db.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
libutil.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
lll_timedlock_wait.c Move sysdeps/unix/sysv/linux/i386/i486/*.? to i386 2015-09-30 10:12:44 -07:00
lll_timedwait_tid.c Move sysdeps/unix/sysv/linux/i386/i486/*.? to i386 2015-09-30 10:12:44 -07:00
localplt.data Document and fix --enable-bind-now [BZ #21015] 2017-03-02 14:44:28 +01:00
lockf64.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
lowlevellock.h robust mutexes: Fix broken x86 assembly by removing it 2017-01-13 17:16:07 +01:00
lowlevellock.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
lxstat.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
makecontext.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Makefile Build divdi3 only for architecture that required it 2017-04-06 15:14:34 -03:00
olddirent.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
profil-counter.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
putmsg.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
readdir64_r.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
readdir64.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
readelflib.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
register-dump.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
scandir64.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
setcontext.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
shlib-versions Clean up gnu/lib-names.h generation (bug 14171). 2014-09-26 17:33:04 +00:00
sigaction.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sigcontextinfo.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
smp.h Clean pthread functions namespaces for C11 threads 2017-06-23 17:38:17 -03:00
startup.h i386: Add <startup.h> [BZ #21913] 2017-08-08 08:43:15 -07:00
swapcontext.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
syscall.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
syscalls.list posix: Consolidate Linux waitpid syscall 2017-05-18 18:06:47 -03:00
sysdep-cancel.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sysdep.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sysdep.h i386: Update I386_USE_SYSENTER for early PIC syscall 2017-08-04 12:30:38 -07:00
time.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ucontext_i.sym * sysdeps/unix/sysv/linux/i386/ucontext_i.h: File removed. 2005-12-22 05:18:34 +00:00
Versions Clean pthread functions namespaces for C11 threads 2017-06-23 17:38:17 -03:00
versionsort64.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
vfork.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
xstat.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00