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glibc/sysdeps/generic
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Alan Modra 0572433b5b PowerPC64 ELFv2 PPC64_OPT_LOCALENTRY 
ELFv2 functions with localentry:0 are those with a single entry point,
ie. global entry == local entry, that have no requirement on r2 or
r12 and guarantee r2 is unchanged on return.  Such an external
function can be called via the PLT without saving r2 or restoring it
on return, avoiding a common load-hit-store for small functions.

This patch implements the ld.so changes necessary for this
optimization.  ld.so needs to check that an optimized plt call
sequence is in fact calling a function implemented with localentry:0,
end emit a fatal error otherwise.

The elf/testobj6.c change is to stop "error while loading shared
libraries: expected localentry:0 `preload'" when running
elf/preloadtest, which we'd get otherwise.

	* elf/elf.h (PPC64_OPT_LOCALENTRY): Define.
	* sysdeps/alpha/dl-machine.h (elf_machine_fixup_plt): Add
	refsym and sym parameters.  Adjust callers.
	* sysdeps/aarch64/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/arm/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/generic/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/hppa/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/i386/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/ia64/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/m68k/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/microblaze/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/mips/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/nios2/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/powerpc/powerpc32/dl-machine.h (elf_machine_fixup_plt):
	Likewise.
	* sysdeps/s390/s390-32/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/s390/s390-64/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/sh/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/sparc/sparc32/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/sparc/sparc64/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/tile/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/x86_64/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/powerpc/powerpc64/dl-machine.c (_dl_error_localentry): New.
	(_dl_reloc_overflow): Increase buffser size.  Formatting.
	* sysdeps/powerpc/powerpc64/dl-machine.h (ppc64_local_entry_offset):
	Delete reloc param, add refsym and sym.  Check optimized plt
	call stubs for localentry:0 functions.  Adjust callers.
	(elf_machine_fixup_plt, elf_machine_plt_conflict): Add refsym
	and sym parameters.  Adjust callers.
	(_dl_reloc_overflow): Move attribute.
	(_dl_error_localentry): Declare.
	* elf/dl-runtime.c (_dl_fixup): Save original sym.  Pass
	refsym and sym to elf_machine_fixup_plt.
	* elf/testobj6.c (preload): Call printf.
2017-06-14 10:47:25 +09:30
..
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 Fix sys/ucontext.h namespace from signal.h etc. inclusion (bug 21457). 2017-05-23 11:49:48 +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-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-machine.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
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 float128: Add private _Float128 declarations for libm. 2017-05-15 10:23:28 -03:00
math-tests-arch.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
math-tests.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +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
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 Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
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 BZ #15754: Fix test case for ARM. 2013-09-23 01:44:38 -04:00
stackinfo.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
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