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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 /ChangeLog | |
parent | c4c96f92f76dbc03a04a0e5005bf0be6f8dd4138 (diff) | |
download | glibc-d8a7d10324d9765fa62f42c1d94c5bf36b60d558.tar.gz glibc-d8a7d10324d9765fa62f42c1d94c5bf36b60d558.tar.xz glibc-d8a7d10324d9765fa62f42c1d94c5bf36b60d558.zip |
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 'ChangeLog')
-rw-r--r-- | ChangeLog | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index ff791f711c..1cbcf564e0 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +2017-06-05 H.J. Lu <hongjiu.lu@intel.com> + + * 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. + 2017-06-05 Joseph Myers <joseph@codesourcery.com> [BZ #21538] |