glibc

Tree: e6b4e2de6d

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.		9 years ago
..
bits	Fix MicroBlaze bits/setjmp.h for C++.	9 years ago
nptl	Optimize generic spinlock code and use C11 like atomic macros.	9 years ago
Implies	[MicroBlaze]: Move MicroBlaze from ports to sysdeps.	12 years ago
Makefile	[MicroBlaze]: Move MicroBlaze from ports to sysdeps.	12 years ago
__longjmp.S	Update copyright dates with scripts/update-copyrights.	9 years ago
_mcount.S	Update copyright dates with scripts/update-copyrights.	9 years ago
abort-instr.h	[MicroBlaze]: Move MicroBlaze from ports to sysdeps.	12 years ago
asm-syntax.h	Update copyright dates with scripts/update-copyrights.	9 years ago
atomic-machine.h	Optimize generic spinlock code and use C11 like atomic macros.	9 years ago
backtrace.c	Fix MicroBlaze __backtrace get_frame_size namespace (bug 21022).	9 years ago
backtrace_linux.c	Update copyright dates with scripts/update-copyrights.	9 years ago
bsd-_setjmp.S	Update copyright dates with scripts/update-copyrights.	9 years ago
bsd-setjmp.S	Update copyright dates with scripts/update-copyrights.	9 years ago
crti.S	Update copyright dates with scripts/update-copyrights.	9 years ago
crtn.S	Update copyright dates with scripts/update-copyrights.	9 years ago
dl-machine.h	PowerPC64 ELFv2 PPC64_OPT_LOCALENTRY	9 years ago
dl-tls.h	Update copyright dates with scripts/update-copyrights.	9 years ago
dl-trampoline.S	Update copyright dates with scripts/update-copyrights.	9 years ago
gccframe.h	Update copyright dates with scripts/update-copyrights.	9 years ago
jmpbuf-unwind.h	Update copyright dates with scripts/update-copyrights.	9 years ago
ldsodefs.h	Update copyright dates with scripts/update-copyrights.	9 years ago
libc-tls.c	Update copyright dates with scripts/update-copyrights.	9 years ago
libm-test-ulps	Remove very old libm-test-ulps entries.	9 years ago
libm-test-ulps-name	Do not hardcode platform names in manual/libm-err-tab.pl (bug 14139).	10 years ago
machine-gmon.h	Update copyright dates with scripts/update-copyrights.	9 years ago
math_private.h	math: add LDBL_CLASSIFY_COMPAT support	11 years ago
memusage.h	Update copyright dates with scripts/update-copyrights.	9 years ago
preconfigure	[MicroBlaze]: Move MicroBlaze from ports to sysdeps.	12 years ago
s_fma.c	Use soft-fp fma for MicroBlaze (bug 13304).	11 years ago
s_fmaf.c	Use soft-fp fma for MicroBlaze (bug 13304).	11 years ago
setjmp.S	Update copyright dates with scripts/update-copyrights.	9 years ago
sfp-machine.h	Use soft-fp fma for MicroBlaze (bug 13304).	11 years ago
sotruss-lib.c	Update copyright dates with scripts/update-copyrights.	9 years ago
stackinfo.h	Update copyright dates with scripts/update-copyrights.	9 years ago
start.S	Update copyright dates with scripts/update-copyrights.	9 years ago
sysdep.h	Update copyright dates with scripts/update-copyrights.	9 years ago
tls-macros.h	Update copyright dates with scripts/update-copyrights.	9 years ago
tst-audit.h	Update copyright dates with scripts/update-copyrights.	9 years ago