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
..
bits	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
nptl	Move shared pthread definitions to common headers	2017-05-09 17:49:17 -03:00
sh3	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
sh4	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
soft-fp
____longjmp_chk.S	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
_mcount.S	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
abort-instr.h
backtrace.c
bsd-_setjmp.S	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
bsd-setjmp.S	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
configure
configure.ac
crti.S	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
crtn.S	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-tls.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
dl-trampoline.S	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
fpu_control.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
gmp-mparam.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
Implies
jmpbuf-offsets.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
jmpbuf-unwind.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
ldsodefs.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
libc-tls.c	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
libm-test-ulps	Remove very old libm-test-ulps entries.	2017-01-20 23:58:49 +00:00
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
linkmap.h
machine-gmon.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
Makefile
math_private.h	math: add LDBL_CLASSIFY_COMPAT support	2015-12-03 13:00:46 -05:00
memcpy.S	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
memset.S	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
preconfigure
s_fma.c
s_fmaf.c
sotruss-lib.c	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
stackguard-macros.h
stackinfo.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
start.S	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
strlen.S	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
sysdep.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
tininess.h
tls-macros.h
tst-audit.h	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00