[1/4] Alpha: Add wrappers to get/setrlimit64 to fix RLIM64_INFINITY constant [BZ #22648]

diff --git a/ChangeLog b/ChangeLog
index ddd49200ed..489cd1fd84 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@ 
+2018-01-05  Aurelien Jarno  <aurelien@aurel32.net>
+
+	[BZ #22648]
+	* sysdeps/unix/sysv/linux/alpha/getrlimit64.c: New file.
+	* sysdeps/unix/sysv/linux/alpha/setrlimit64.c: Ditto.
+
 2018-01-04  Joseph Myers  <joseph@codesourcery.com>
 
 	* malloc/tst-malloc-tcache-leak.c (TIMEOUT): Define to 50.
diff --git a/sysdeps/unix/sysv/linux/alpha/getrlimit64.c b/sysdeps/unix/sysv/linux/alpha/getrlimit64.c
new file mode 100644
index 0000000000..908be53180
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/getrlimit64.c
@@ -0,0 +1,64 @@ 
+/* Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <sys/types.h>
+
+/* Add this redirection so the strong_alias linking getrlimit64 to
+   {__}getrlimit does not throw a type error.  */
+#undef getrlimit
+#undef __getrlimit
+#define getrlimit getrlimit_redirect
+#define __getrlimit __getrlimit_redirect
+#include <sys/resource.h>
+#undef getrlimit
+#undef __getrlimit
+
+/* RLIM64_INFINITY was supposed to be a glibc convention rather than
+   anything seen by the kernel, but it ended being passed to the kernel
+   through the prlimit64 syscall.  Given that a lot of binaries with
+   the wrong constant value are in the wild, provide a wrapper function
+   fixing the value after the syscall.  */
+#define KERNEL_RLIM64_INFINITY		0xffffffffffffffffULL
+
+int
+__getrlimit64 (enum __rlimit_resource resource, struct rlimit64 *rlimits)
+{
+  struct rlimit64 krlimits;
+
+  if (INLINE_SYSCALL_CALL (prlimit64, 0, resource, NULL, &krlimits) < 0)
+    return -1;
+
+  if (krlimits.rlim_cur == KERNEL_RLIM64_INFINITY)
+    rlimits->rlim_cur = RLIM64_INFINITY;
+  else
+    rlimits->rlim_cur = krlimits.rlim_cur;
+  if (krlimits.rlim_max == KERNEL_RLIM64_INFINITY)
+    rlimits->rlim_max = RLIM64_INFINITY;
+  else
+    rlimits->rlim_max = krlimits.rlim_max;
+
+  return 0;
+}
+libc_hidden_def (__getrlimit64)
+strong_alias (__getrlimit64, __GI_getrlimit)
+strong_alias (__getrlimit64, __GI___getrlimit)
+strong_alias (__getrlimit64, __getrlimit)
+weak_alias (__getrlimit64, getrlimit)
+
+weak_alias (__getrlimit64, getrlimit64)
+libc_hidden_weak (getrlimit64)
diff --git a/sysdeps/unix/sysv/linux/alpha/setrlimit64.c b/sysdeps/unix/sysv/linux/alpha/setrlimit64.c
new file mode 100644
index 0000000000..1b8a95b9e9
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/setrlimit64.c
@@ -0,0 +1,61 @@ 
+/* Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <sys/types.h>
+
+/* Add this redirection so the strong_alias linking setrlimit64 to
+   {__}setrlimit does not throw a type error.  */
+#undef setrlimit
+#undef __setrlimit
+#define setrlimit setrlimit_redirect
+#define __setrlimit __setrlimit_redirect
+#include <sys/resource.h>
+#undef setrlimit
+#undef __setrlimit
+
+/* RLIM64_INFINITY was supposed to be a glibc convention rather than
+   anything seen by the kernel, but it ended being passed to the kernel
+   through the prlimit64 syscall.  Given that a lot of binaries with
+   the wrong constant value are in the wild, provide a wrapper function
+   fixing the value before the syscall.  */
+#define KERNEL_RLIM64_INFINITY		0xffffffffffffffffULL
+
+int
+__setrlimit64 (enum __rlimit_resource resource, const struct rlimit64 *rlimits)
+{
+  struct rlimit64 krlimits;
+
+  if (rlimits->rlim_cur == RLIM64_INFINITY)
+    krlimits.rlim_cur = KERNEL_RLIM64_INFINITY;
+  else
+    krlimits.rlim_cur = rlimits->rlim_cur;
+  if (rlimits->rlim_max == RLIM64_INFINITY)
+    krlimits.rlim_max = KERNEL_RLIM64_INFINITY;
+  else
+    krlimits.rlim_max = rlimits->rlim_max;
+
+  return INLINE_SYSCALL_CALL (prlimit64, 0, resource, &krlimits, NULL);
+}
+
+weak_alias (__setrlimit64, setrlimit64)
+
+strong_alias (__setrlimit64, __setrlimit)
+weak_alias (__setrlimit64, setrlimit)
+#ifdef SHARED
+__hidden_ver1 (__setrlimit64, __GI___setrlimit, __setrlimit64);
+#endif