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author | H.J. Lu <hjl.tools@gmail.com> | 2017-06-05 07:21:44 -0700 |
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committer | H.J. Lu <hjl.tools@gmail.com> | 2017-06-05 07:21:57 -0700 |
commit | d8a7d10324d9765fa62f42c1d94c5bf36b60d558 (patch) | |
tree | b5b327952195b4aafa8a96a8a3fc83dbe4432333 /mach/err_mach.sub | |
parent | c4c96f92f76dbc03a04a0e5005bf0be6f8dd4138 (diff) | |
download | glibc-d8a7d10324d9765fa62f42c1d94c5bf36b60d558.zip glibc-d8a7d10324d9765fa62f42c1d94c5bf36b60d558.tar.gz glibc-d8a7d10324d9765fa62f42c1d94c5bf36b60d558.tar.bz2 |
x86-64: Update LO_HI_LONG for p{readv,writev}{64}v2
The kernel interface for p{readv,writev}{64}v is
(unsigned long fd, {const }struct iovec *iov, unsigned long vlen,
unsigned long pos_l, unsigned long pos_h)
Except for targets which define __ARCH_WANT_COMPAT_SYS_PREADV64 and
__ARCH_WANT_COMPAT_SYS_PWRITEV64,
(unsigned long fd, {const }struct iovec *iov, unsigned long vlen,
off64_t pos)
is used for p{readv,writev}{64}v. X32 is the only such target. The
LO_HI_LONG macro is used to pass offset to the pos_l and pos_h pair.
Since pos_h is ignored when size of offset == sizeof of pos_l, x86-64
has
#define LO_HI_LONG(val) (val)
But the kernel interface for p{readv,writev}{64}v2 is
(unsigned long fd, {const }struct iovec *iov, unsigned long vlen,
unsigned long pos_l, unsigned long pos_h, int flags)
Except for targets which define __ARCH_WANT_COMPAT_SYS_PREADV64V2 and
__ARCH_WANT_COMPAT_SYS_PWRITEV64V2,
(unsigned long fd, {const }struct iovec *iov, unsigned long vlen,
off64_t pos, int flags)
is used for p{readv,writev}{64}v2. X32 is the only such target. Update
x86-64 LO_HI_LONG to pass 0 as the high part of the offset argument for
p{readv,writev}{64}v2 and define a different LO_HI_LONG for x32 to only
pass one argument for offset.
Tested on x32 and x86-64.
* sysdeps/unix/sysv/linux/x86_64/sysdep.h (LO_HI_LONG): Pass
0 as the high part of offset.
* sysdeps/unix/sysv/linux/x86_64/x32/sysdep.h (LO_HI_LONG): New.
Diffstat (limited to 'mach/err_mach.sub')
0 files changed, 0 insertions, 0 deletions