Consolidate Linux setrlimit and getrlimit implementation

This patch consolidates all Linux setrlimit and getrlimit on the default
sysdeps/unix/sysv/linux/{set,get}rlimit{64}.c.  It contains two exceptions:

  1. mips32 and mips64n32 which requires a versioned symbol for GLIBC 2.19
     and higher due a broken RLIM64_INFINITY constant.
  2. sparc32 does not define a compat symbol for getrlimit64 for old 2GB
     limit. I am not sure if it is required, but a RLIM_INFINITY fix [1]
     change its definition without adding a compat symbol.  This patch does
     not aim to address this possible issue, it follow current symbol
     export.

The default implementation uses prlimit64 for 64 bit rlim_t ({set,get}rlimit64)
and if it fails with ENOSYS it fall back to {get,set}rlimit syscall.  This
code path is only used on kernel older than 2.6.36 (basically now only x86)
and I avoid to user __ASSUME_PRLIMTI64 to simplify the implementation.  Once
x86 moves to be on par with other architectures regarding minimum kernel
supported we can get rid of using old syscalls and default path.

A new type size define is added, __RLIM_T_MATCHES_RLIM64_T, where is set as
default for 64 bits ports.  This allows the default implementation to avoid
{get,set}rlimit building and alias {get,set}rlimit64 to {get,set}rlimit.

Checked on x86_64, i386, armhf, aarch64, and powerpc64le.  I also did a
sanity build plus check-abi on all other supported architectures.

[1] Commit 9c96ff23858b0759e12ad69e3c4599931c90bee8

	Adhemerval Zanella  <adhemerval.zanella@linaro.org>
	Yury Norov  <ynorov@caviumnetworks.com>

	* bits/typesizes.h (__RLIM_T_MATCHES_RLIM64_T): define.
	* sysdeps/unix/sysv/linux/alpha/bits/typesizes.h
	(__RLIM_T_MATCHES_RLIM64_T): Likewise.
	* sysdeps/unix/sysv/linux/generic/bits/typesizes.h
	(__RLIM_T_MATCHES_RLIM64_T): Likewise.
	* sysdeps/unix/sysv/linux/s390/bits/typesizes.h [__s390x__]
	(__RLIM_T_MATCHES_RLIM64_T): Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/typesizes.h
	[__arch64__ || __sparcv9] (__RLIM_T_MATCHES_RLIM64_T): Likewise.
	* sysdeps/unix/sysv/linux/x86/bits/typesizes.h [__86_64__]
	(__RLIM_T_MATCHES_RLIM64_T): Likewise.
	* sysdeps/unix/sysv/linux/arm/Makefile [$(subdir) = resource]
	(sysdep_routines): Remove oldgetrlimit64.
	* sysdeps/unix/sysv/linux/i386/Makefile [$(subdir) = resource]
	(sysdep_routines): Likewise.
	* sysdeps/unix/sysv/linux/m68k/Makefile [$(subdir) = resource]
	(sysdep_routines): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/Makefile
	[$(subdir) = resource] (sysdep_routines): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/Makefile
	[$(subdir) = resource] (sysdep_routines): Likewise.
	* sysdeps/unix/sysv/linux/arm/getrlimit64.c: Remove file.
	* sysdeps/unix/sysv/linux/arm/oldgetrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/hppa/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/oldgetrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/m68k/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/m68k/oldgetrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/oldgetrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/oldgetrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/sh/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/setrlimit64.c: Likewise.
	* sysdeps/sysv/linux/generic/wordsize-32/syscalls.list: Remove
	setrlimit and getrlimit.
	* sysdeps/unix/sysv/linux/hppa/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/i386/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/getrlimit.c: New file.
	* sysdeps/unix/sysv/linux/sparc/getrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/setrlimit.c: Likewise.
	* sysdeps/unix/sysv/linux/getrlimit64.c (__getrlimit64): Handle
	__RLIM_T_MATCHES_RLIM64_T and add alias if defined.
	(__old_getrlimit64): Add compatibility symbol.
	* sysdeps/unix/sysv/linux/setrlimit64.c (__setrlimit): Likewise.

1 files changed, 59 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 721ea68d24..330a631331 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,62 @@
+2016-11-17  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
+	    Yury Norov  <ynorov@caviumnetworks.com>
+
+	* bits/typesizes.h (__RLIM_T_MATCHES_RLIM64_T): define.
+	* sysdeps/unix/sysv/linux/alpha/bits/typesizes.h
+	(__RLIM_T_MATCHES_RLIM64_T): Likewise.
+	* sysdeps/unix/sysv/linux/generic/bits/typesizes.h
+	(__RLIM_T_MATCHES_RLIM64_T): Likewise.
+	* sysdeps/unix/sysv/linux/s390/bits/typesizes.h [__s390x__]
+	(__RLIM_T_MATCHES_RLIM64_T): Likewise.
+	* sysdeps/unix/sysv/linux/sparc/bits/typesizes.h
+	[__arch64__ || __sparcv9] (__RLIM_T_MATCHES_RLIM64_T): Likewise.
+	* sysdeps/unix/sysv/linux/x86/bits/typesizes.h [__86_64__]
+	(__RLIM_T_MATCHES_RLIM64_T): Likewise.
+	* sysdeps/unix/sysv/linux/arm/Makefile [$(subdir) = resource]
+	(sysdep_routines): Remove oldgetrlimit64.
+	* sysdeps/unix/sysv/linux/i386/Makefile [$(subdir) = resource]
+	(sysdep_routines): Likewise.
+	* sysdeps/unix/sysv/linux/m68k/Makefile [$(subdir) = resource]
+	(sysdep_routines): Likewise.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc32/Makefile
+	[$(subdir) = resource] (sysdep_routines): Likewise.
+	* sysdeps/unix/sysv/linux/s390/s390-32/Makefile
+	[$(subdir) = resource] (sysdep_routines): Likewise.
+	* sysdeps/unix/sysv/linux/arm/getrlimit64.c: Remove file.
+	* sysdeps/unix/sysv/linux/arm/oldgetrlimit64.c: Likewise.
+	* sysdeps/unix/sysv/linux/arm/oldgetrlimit.c: Likewise.
+	* sysdeps/unix/sysv/linux/arm/oldsetrlimit.c: Likewise.
+	* sysdeps/unix/sysv/linux/hppa/getrlimit64.c: Likewise.
+	* sysdeps/unix/sysv/linux/i386/getrlimit64.c: Likewise.
+	* sysdeps/unix/sysv/linux/i386/oldgetrlimit64.c: Likewise.
+	* sysdeps/unix/sysv/linux/m68k/getrlimit64.c: Likewise.
+	* sysdeps/unix/sysv/linux/m68k/oldgetrlimit64.c: Likewise.
+	* sysdeps/unix/sysv/linux/powerpc/getrlimit64.c: Likewise.
+	* sysdeps/unix/sysv/linux/powerpc/oldgetrlimit64.c: Likewise.
+	* sysdeps/unix/sysv/linux/s390/s390-32/getrlimit64.c: Likewise.
+	* sysdeps/unix/sysv/linux/s390/s390-32/oldgetrlimit64.c: Likewise.
+	* sysdeps/unix/sysv/linux/sh/getrlimit64.c: Likewise.
+	* sysdeps/unix/sysv/linux/wordsize-64/getrlimit64.c: Likewise.
+	* sysdeps/unix/sysv/linux/wordsize-64/setrlimit64.c: Likewise.
+	* sysdeps/sysv/linux/generic/wordsize-32/syscalls.list: Remove
+	setrlimit and getrlimit.
+	* sysdeps/unix/sysv/linux/hppa/syscalls.list: Likewise.
+	* sysdeps/unix/sysv/linux/i386/syscalls.list: Likewise.
+	* sysdeps/unix/sysv/linux/m68k/m680x0/syscalls.list: Likewise.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc32/syscalls.list: Likewise.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc64/syscalls.list: Likewise.
+	* sysdeps/unix/sysv/linux/s390/s390-32/syscalls.list: Likewise.
+	* sysdeps/unix/sysv/linux/sparc/sparc32/syscalls.list: Likewise.
+	* sysdeps/unix/sysv/linux/syscalls.list: Likewise.
+	* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list: Likewise.
+	* sysdeps/unix/sysv/linux/getrlimit.c: New file.
+	* sysdeps/unix/sysv/linux/sparc/getrlimit64.c: Likewise.
+	* sysdeps/unix/sysv/linux/setrlimit.c: Likewise.
+	* sysdeps/unix/sysv/linux/getrlimit64.c (__getrlimit64): Handle
+	__RLIM_T_MATCHES_RLIM64_T and add alias if defined.
+	(__old_getrlimit64): Add compatibility symbol.
+	* sysdeps/unix/sysv/linux/setrlimit64.c (__setrlimit): Likewise.
+
 2016-11-17  Joseph Myers  <joseph@codesourcery.com>
 
 	* scripts/build-many-glibcs.py (Config.build_gcc): Configure with