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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2016-08-25 17:42:44 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2016-11-08 16:04:33 -0200 |
| commit | 3c7f1f59cd1611e0727f9b5ffc32dae78cb05000 (patch) | |
| tree | e70424eba74bebc6cbc1466f995d8474c57ce89d /nptl | |
| parent | e0c6851980806f2a51b37e3e37fc9a48420a4a83 (diff) | |
| download | glibc-3c7f1f59cd1611e0727f9b5ffc32dae78cb05000.tar.gz | |
Consolidate lseek/lseek64/llseek implementations
This patch consolidates all Linux lseek/lseek64/llseek implementation
in on on sysdeps/unix/sysv/linux/lseek{64}.c. It also removes the llseek
file and instead consolidate the LFS lseek implementation on lseek64.c
as for other LFS symbols implementations.
The general idea is:
- lseek: ABIs that not define __OFF_T_MATCHES_OFF64_T will preferable
use __NR__llseek if kernel supports it, otherwise they will use __NR_lseek.
ABIs that defines __OFF_T_MATCHES_OFF64_T won't produce any symbol.
- lseek64: ABIs with __OFF_T_MATCHES_OFF64_T will preferable use __NR_lseek
(since it will use 64-bit arguments without low/high splitting) and
__NR__llseek if __NR_lseek is not defined (for some ILP32 ports).
- llseek: files will be removed and symbols will be aliased ot lseek64.
ABI without __OFF_T_MATCHES_OFF64_T and without __NR_llseek (basically MIPS64n32
so far) are covered by building lseek with off_t as expected and lseek64
using __NR_lseek (as expected for off64_t being passed using 64-bit registers).
For this consolidation I mantained the x32 assembly specific implementation
because to correctly fix this it would required both the x32 fix for
{INLINE,INTERNAL}_SYSCALL [1] and a wrapper to correctly subscribe it to
return 64 bits instead of default 32 bits (as for times). It could a future
cleanup.
It is based on my previous {INTERNAL,INLINE}_SYSCALL_CALL macro [2],
although it is mainly for simplification.
Tested on x86_64, i686, aarch64, armhf, and powerpc64le.
* nptl/Makefile (libpthread-routines): Remove ptw-llseek and add
ptw-lseek64.
* sysdeps/unix/sysv/linux/Makefile (sysdeps_routines): Remove llseek.
* sysdeps/unix/sysv/linux/alpha/Makefile (sysdeps_routines):
Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/llseek.c: Remove file.
* sysdeps/unix/sysv/linux/generic/wordsize-32/lseek.c: Remove file.
* sysdeps/unix/sysv/linux/mips/mips64/llseek.c: Likewise.
* sysdeps/unix/sysv/linux/llseek.c: Remove file.
* sysdeps/unix/sysv/linux/lseek.c: New file.
* sysdeps/unix/sysv/linux/lseek64.c: Add default Linux implementation.
* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list: Remove lseek and
__libc_lseek64 from auto-generation.
* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/lseek64.S: New file.
[1] https://sourceware.org/ml/libc-alpha/2016-08/msg00443.html
[2] https://sourceware.org/ml/libc-alpha/2016-08/msg00646.html
Diffstat (limited to 'nptl')
| -rw-r--r-- | nptl/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/nptl/Makefile b/nptl/Makefile index 91303db54d..11588fe996 100644 --- a/nptl/Makefile +++ b/nptl/Makefile @@ -38,7 +38,7 @@ shared-only-routines = forward pthread-compat-wrappers = \ write read close fcntl accept \ connect recv recvfrom send \ - sendto fsync lseek llseek \ + sendto fsync lseek lseek64 \ msync nanosleep open open64 pause \ pread pread64 pwrite pwrite64 \ tcdrain wait waitpid msgrcv msgsnd \ |