From 7ad553b96e2d5b88b79506b9a60c21415072ccaf Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Fri, 25 Jun 2021 10:30:36 +0200
Subject: Linux: Move aio_read, aio_read64 into libc

Both symbols have to be moved at the same time because they
are intertwined for __WORDSIZE == 64.  The treatment of this case
is also changed to match more closely how the other files suppress
the declaration of the *64 identifier.

The symbols were moved using scripts/move-symbol-to-libc.py.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
---
 rt/Makefile     |  4 ++--
 rt/Versions     |  6 +++++-
 rt/aio_read.c   | 32 +++++++++++++++++++++++++++++---
 rt/aio_read64.c | 20 ++++++++++++++++----
 4 files changed, 52 insertions(+), 10 deletions(-)

(limited to 'rt')

diff --git a/rt/Makefile b/rt/Makefile
index 119b757d2a..ec2aff9ce4 100644
--- a/rt/Makefile
+++ b/rt/Makefile
@@ -29,8 +29,6 @@ routines = \
   shm_unlink \
 
 librt-routines = \
-  aio_read \
-  aio_read64 \
   aio_return \
   aio_suspend \
   aio_write \
@@ -62,6 +60,8 @@ $(librt-routines-var) += \
   aio_fsync \
   aio_misc \
   aio_notify \
+  aio_read \
+  aio_read64 \
   aio_sigqueue \
 
 tests := tst-shm tst-timer tst-timer2 \
diff --git a/rt/Versions b/rt/Versions
index 1a0aa77fd0..6db40bebc4 100644
--- a/rt/Versions
+++ b/rt/Versions
@@ -8,6 +8,8 @@ libc {
     aio_error64;
     aio_fsync;
     aio_fsync64;
+    aio_read;
+    aio_read64;
 %endif
   }
   GLIBC_2.2 {
@@ -23,6 +25,8 @@ libc {
     aio_error64;
     aio_fsync;
     aio_fsync64;
+    aio_read;
+    aio_read64;
 %endif
     shm_open;
     shm_unlink;
@@ -51,9 +55,9 @@ librt {
     aio_fsync;
     aio_fsync64;
     aio_init;
-%endif
     aio_read;
     aio_read64;
+%endif
     aio_return;
     aio_return64;
     aio_suspend;
diff --git a/rt/aio_read.c b/rt/aio_read.c
index 4698e48b1c..61cf8bc99a 100644
--- a/rt/aio_read.c
+++ b/rt/aio_read.c
@@ -17,14 +17,40 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <aio.h>
+#include <bits/wordsize.h>
+#if __WORDSIZE == 64
+# define aio_read64 XXX
+# include <aio.h>
+/* And undo the hack.  */
+# undef aio_read64
+#else
+# include <aio.h>
+#endif
 
 #include <aio_misc.h>
-
+#include <shlib-compat.h>
 
 int
-aio_read (struct aiocb *aiocbp)
+__aio_read (struct aiocb *aiocbp)
 {
   return (__aio_enqueue_request ((aiocb_union *) aiocbp, LIO_READ) == NULL
 	  ? -1 : 0);
 }
+
+#if PTHREAD_IN_LIBC
+versioned_symbol (libc, __aio_read, aio_read, GLIBC_2_34);
+# if __WORDSIZE == 64
+versioned_symbol (libc, __aio_read, aio_read64, GLIBC_2_34);
+# endif
+# if OTHER_SHLIB_COMPAT (librt, GLIBC_2_1, GLIBC_2_34)
+compat_symbol (librt, __aio_read, aio_read, GLIBC_2_1);
+#  if __WORDSIZE == 64
+compat_symbol (librt, __aio_read, aio_read64, GLIBC_2_1);
+#  endif
+# endif
+#else /* !PTHREAD_IN_LIBC */
+strong_alias (__aio_read, aio_read)
+# if __WORDSIZE == 64
+weak_alias (__aio_read, aio_read64)
+#endif
+#endif  /* !PTHREAD_IN_LIBC */
diff --git a/rt/aio_read64.c b/rt/aio_read64.c
index 26b9b0b380..3aa169fbf3 100644
--- a/rt/aio_read64.c
+++ b/rt/aio_read64.c
@@ -17,14 +17,26 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <aio.h>
-
-#include <aio_misc.h>
+#include <bits/wordsize.h>
+#if __WORDSIZE != 64
 
+# include <aio.h>
+# include <aio_misc.h>
+# include <shlib-compat.h>
 
 int
-aio_read64 (struct aiocb64 *aiocbp)
+__aio_read64 (struct aiocb64 *aiocbp)
 {
   return (__aio_enqueue_request ((aiocb_union *) aiocbp, LIO_READ64) == NULL
 	  ? -1 : 0);
 }
+
+# if PTHREAD_IN_LIBC
+versioned_symbol (libc, __aio_read64, aio_read64, GLIBC_2_34);
+#  if OTHER_SHLIB_COMPAT (librt, GLIBC_2_1, GLIBC_2_34)
+compat_symbol (librt, __aio_read64, aio_read64, GLIBC_2_1);
+#  endif
+# else /* !PTHREAD_IN_LIBC */
+strong_alias (__aio_read64, aio_read64)
+# endif
+#endif /* __WORDSIZE != 64 */
-- 
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