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authorH.J. Lu <hjl.tools@gmail.com>2016-07-12 09:21:36 -0700
committerH.J. Lu <hjl.tools@gmail.com>2016-07-12 09:21:56 -0700
commitf531f93056b34800383c5154280e7ba5112563c7 (patch)
tree23cd6ebe83824bea3829476456b8c112221666aa /sysdeps
parent3bbee82a56b38fc4ee28ecb59721ea1d42494642 (diff)
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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.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/x86_64/syscalls.list4
1 files changed, 4 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/syscalls.list b/sysdeps/unix/sysv/linux/x86_64/syscalls.list
index d09d101da5..bcf63701de 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