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GNU C Library master sources branch master updated. glibc-2.23-561-gf531f93
- From: hjl at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 12 Jul 2016 16:22:19 -0000
- Subject: GNU C Library master sources branch master updated. glibc-2.23-561-gf531f93
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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=f531f93056b34800383c5154280e7ba5112563c7
commit f531f93056b34800383c5154280e7ba5112563c7
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Tue Jul 12 09:21:36 2016 -0700
x86-64: Add p{read,write}[v]64 to syscalls.list [BZ #20348]
64-bit off_t in pread64, preadv, pwrite64 and pwritev syscalls is passed
in one 64-bit register for both x32 and x86-64. Since the inline
asm statement only passes long, which is 32-bit for x32, in registers,
64-bit off_t is truncated to 32-bit on x32. Since __ASSUME_PREADV and
__ASSUME_PWRITEV are defined unconditionally, these syscalls can be
implemented in syscalls.list to pass 64-bit off_t in one 64-bit register.
Tested on x86-64 and x32 with off_t > 4GB on pread64/pwrite64 and
preadv64/pwritev64.
[BZ #20348]
* sysdeps/unix/sysv/linux/x86_64/syscalls.list: Add pread64,
preadv64, pwrite64 and pwritev64.
diff --git a/ChangeLog b/ChangeLog
index a93884a..e9ab885 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
2016-07-12 H.J. Lu <hongjiu.lu@intel.com>
+ [BZ #20348]
+ * sysdeps/unix/sysv/linux/x86_64/syscalls.list: Add pread64,
+ preadv64, pwrite64 and pwritev64.
+
+2016-07-12 H.J. Lu <hongjiu.lu@intel.com>
+
[BZ #20350]
* posix/tst-preadwrite.c: Renamed to ...
* posix/tst-preadwrite-common.c: This.
diff --git a/sysdeps/unix/sysv/linux/x86_64/syscalls.list b/sysdeps/unix/sysv/linux/x86_64/syscalls.list
index d09d101..bcf6370 100644
--- a/sysdeps/unix/sysv/linux/x86_64/syscalls.list
+++ b/sysdeps/unix/sysv/linux/x86_64/syscalls.list
@@ -6,6 +6,10 @@ msgctl - msgctl i:iip __msgctl msgctl
msgget - msgget i:ii __msgget msgget
msgrcv - msgrcv Ci:ibnii __msgrcv msgrcv
msgsnd - msgsnd Ci:ibni __msgsnd msgsnd
+pread64 - pread64 Ci:ipii __libc_pread __libc_pread64 __pread64 pread64 __pread pread
+preadv64 - preadv Ci:ipii preadv64 preadv
+pwrite64 - pwrite64 Ci:ipii __libc_pwrite __pwrite64 pwrite64 __pwrite pwrite
+pwritev64 - pwritev Ci:ipii pwritev64 pwritev
shmat - shmat i:ipi __shmat shmat
shmctl - shmctl i:iip __shmctl shmctl
shmdt - shmdt i:s __shmdt shmdt
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 6 ++++++
sysdeps/unix/sysv/linux/x86_64/syscalls.list | 4 ++++
2 files changed, 10 insertions(+), 0 deletions(-)
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