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
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alphaev6	Update copyright dates with scripts/update-copyrights.	9 years ago
alphaev67	Update copyright dates with scripts/update-copyrights.	9 years ago
bits	Update copyright dates with scripts/update-copyrights.	9 years ago
fpu	Add earlyclobber to sqrtt/sqrtf insns.	9 years ago
nptl	Move shared pthread definitions to common headers	9 years ago
soft-fp	Update copyright dates with scripts/update-copyrights.	9 years ago
Implies	Relocate alpha from ports to libc	12 years ago
Makefile	Update copyright dates with scripts/update-copyrights.	9 years ago
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__longjmp.S	Update copyright dates with scripts/update-copyrights.	9 years ago
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add_n.S	Update copyright dates with scripts/update-copyrights.	9 years ago
addmul_1.S	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	Relocate alpha from ports to libc	12 years ago
bb_init_func.S	Update copyright dates with scripts/update-copyrights.	9 years ago
bsd-_setjmp.S	Relocate alpha from ports to libc	12 years ago
bsd-setjmp.S	Relocate alpha from ports to libc	12 years ago
bzero.S	Update copyright dates with scripts/update-copyrights.	9 years ago
configure	Require autoconf 2.69	12 years ago
configure.ac	Require autoconf 2.69	12 years ago
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dl-dtprocnum.h	Relocate alpha from ports to libc	12 years ago
dl-machine.h	PowerPC64 ELFv2 PPC64_OPT_LOCALENTRY	9 years ago
dl-procinfo.c	Update copyright dates with scripts/update-copyrights.	9 years ago
dl-procinfo.h	Remove _dl_platform_string	9 years ago
dl-sysdep.h	Update copyright dates with scripts/update-copyrights.	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
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memchr.c	alpha: Use saturating arithmetic in memchr	9 years ago
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preconfigure	Remove relro configure test.	12 years ago
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tininess.h	Relocate alpha from ports to libc	12 years ago
tls-macros.h	Relocate alpha from ports to libc	12 years ago
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