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glibc/sysdeps/generic
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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
..
net Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
netinet Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
nfs Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sys Rename struct ucontext tag (bug 21457). 2017-06-26 22:03:58 +00:00
_G_config.h Remove __need macros from stdio.h and wchar.h. 2017-06-08 13:58:17 -04:00
_itoa.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
a.out.h
abort-instr.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
aio_misc.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
allocalim.h
asm-syntax.h
atomic-machine.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
c++-types.data Add placeholder c++-types.data and *.abilist files. 2015-02-13 15:41:34 -08:00
confstr.h
device-nrs.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dirstream.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-cache.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-dtprocnum.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-dtv.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-fcntl.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-fileid.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-fptr.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-hash.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-irel.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-librecon.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-lookupcfg.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-machine.h PowerPC64 ELFv2 PPC64_OPT_LOCALENTRY 2017-06-14 10:47:25 +09:30
dl-mman.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-osinfo.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-procinfo.c
dl-procinfo.h Remove _dl_platform_string 2017-03-14 17:18:52 +01:00
dl-sysdep.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dl-tls.h
dl-unistd.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dwarf2.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
elide.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
eloop-threshold.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
entry.h
errqueue.h
exit-thread.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fd_to_filename.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fips-private.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fix-fp-int-compare-invalid.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fix-fp-int-convert-overflow.h float128: Add private _Float128 declarations for libm. 2017-05-15 10:23:28 -03:00
fix-int-fp-convert-zero.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
fork.h
fpu_control.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
frame.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
framestate.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
gcc-compat.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
gccframe.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
get-rounding-mode.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
gmp-mparam.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
hp-timing-common.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
hp-timing.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ifreq.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ifunc-sel.h Do not stack-protect ifunc resolvers [BZ #7065] 2016-12-26 10:08:41 +01:00
intr-msg.h
inttypes.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ld.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
ldconfig.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ldsodefs.h ld.so: Consolidate 2 strtouls into _dl_strtoul [BZ #21528] 2017-06-08 12:52:42 -07:00
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-lock.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
libc-mmap.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
libc-start.h powerpc: Fix float128 IFUNC relocations [BZ #21707] 2017-07-17 17:49:26 -03:00
libc-tsd.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
libc.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
libcidn.abilist
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-test-ulps
libm-test-ulps-name Do not hardcode platform names in manual/libm-err-tab.pl (bug 14139). 2016-11-04 16:49:06 +00:00
libm.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
libnsl.abilist Add placeholder libnsl.abilist and libutil.abilist files 2016-03-07 00:49:36 +01:00
libnss_compat.abilist
libnss_db.abilist
libnss_dns.abilist
libnss_files.abilist
libnss_hesiod.abilist
libnss_nis.abilist
libnss_nisplus.abilist
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
libutil.abilist Add placeholder libnsl.abilist and libutil.abilist files 2016-03-07 00:49:36 +01:00
linkmap.h Rename bits/linkmap.h to linkmap.h (bug 14912). 2015-09-04 19:44:27 +00:00
local-setxid.h
localplt.data ld.so: Remove __libc_memalign 2016-11-30 16:23:58 +01:00
machine-gmon.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
machine-lock.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
machine-sp.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Makefile Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
malloc-alignment.h i386: Increase MALLOC_ALIGNMENT to 16 [BZ #21120] 2017-06-30 09:11:24 -07:00
malloc-machine.h i386: Increase MALLOC_ALIGNMENT to 16 [BZ #21120] 2017-06-30 09:11:24 -07:00
malloc-sysdep.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
math_ldbl_opt.h
math_ldbl.h Allow direct use of math_ldbl.h in testsuite. 2017-02-25 10:40:48 -05:00
math_private_calls.h float128: Add private _Float128 declarations for libm. 2017-05-15 10:23:28 -03:00
math_private.h Reimplement min_of_type using __MATH_TG. 2017-08-04 21:32:57 +00:00
math-tests-arch.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
math-tests.h Support _Float128 in math-tests.h. 2017-06-22 23:03:38 +00:00
math-type-macros-double.h Add new templates for IEEE wrappers 2017-02-23 11:28:50 -03:00
math-type-macros-float128.h float128: Enable use of IEEE wrapper templates 2017-05-15 10:24:14 -03:00
math-type-macros-float.h Add new templates for IEEE wrappers 2017-02-23 11:28:50 -03:00
math-type-macros-ldouble.h Add new templates for IEEE wrappers 2017-02-23 11:28:50 -03:00
math-type-macros.h Convert e_exp2l.c into a template 2017-05-17 14:44:08 -03:00
memcopy.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memusage.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
nan-high-order-bit.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
not-cancel.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
not-errno.h tunables: Use direct syscall for access (BZ#21744) 2017-07-24 11:21:07 -03:00
nscd-types.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
pagecopy.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
paths.h
profil-counter.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
pty-private.h 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
rtld-lowlevel.h
safe-fatal.h 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
siglist.h Factor out shared definitions from bits/signum.h. 2017-06-20 20:32:50 -04:00
sigset-cvt-mask.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sigsetops.h Remove __need macros from signal.h. 2017-05-20 19:04:43 -04:00
stackguard-macros.h
stackinfo.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
startup.h i386: Add <startup.h> [BZ #21913] 2017-08-08 08:43:15 -07:00
stdint.h Fix network headers stdint.h namespace (bug 21455). 2017-05-04 20:36:42 +00:00
stdio-lock.h Remove _IO_MTSAFE_IO from public headers. 2017-05-11 19:14:11 -04:00
string_private.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
symbol-hacks.h PLT avoidance for __stack_chk_fail [BZ #7065] 2016-12-26 10:11:05 +01:00
sysdep-cancel.h
sysdep.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
thread_state.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tininess.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tls-macros.h
tls.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tst-audit.h
tst-stack-align.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
unsecvars.h Ignore and remove LD_HWCAP_MASK for AT_SECURE programs (bug #21209) 2017-03-07 20:52:04 +05:30
unwind-dw2-fde-glibc.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
unwind-dw2-fde.c [BZ 21357] unwind-dw2-fde: Call free() outside of unwind mutex 2017-04-17 12:03:44 -03:00
unwind-dw2-fde.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
unwind-dw2.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
unwind-pe.c
unwind-pe.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
unwind-resume.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
unwind.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
utmp-equal.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00