AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-12-19 17:30:08 +00:00
Code Issues Packages Projects Releases Wiki Activity

x86-64: Add p{read,write}[v]64 to syscalls.list [BZ #20348]

Browse Source 
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.
This commit is contained in:
H.J. Lu 2016-07-12 09:21:36 -07:00
parent 3bbee82a56
commit f531f93056
2 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
ChangeLog
View File

@ -1,3 +1,9 @@
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]

4
sysdeps/unix/sysv/linux/x86_64/syscalls.list
View File

@ -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