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| author | Peter Wemm <peter@FreeBSD.org> | 2007-07-04 23:27:38 +0000 |
|---|---|---|
| committer | Peter Wemm <peter@FreeBSD.org> | 2007-07-04 23:27:38 +0000 |
| commit | 4dd719bd7f6491cea2f15846bf5ebcfd3d5e862f (patch) | |
| tree | c6557e22092cc28b77304e9185ac106ae162a5ca /lib/libc/include | |
| parent | 65a6d893baa4ff43995d874bdaf3119266533e84 (diff) | |
| download | src-4dd719bd7f6491cea2f15846bf5ebcfd3d5e862f.tar.gz src-4dd719bd7f6491cea2f15846bf5ebcfd3d5e862f.zip | |
Change the C wrappers for mmap/lseek/pread/pwrite/truncate/ftruncate to
call the pad-less versions of the corresponding syscalls if the running
kernel supports it. Check kern.osreldate once per program and cache the
result to select the appropriate syscall. This maintains userland
compatability with kernel.old's from quite a while back.
Approved by: re (kensmith)
Notes
Notes:
svn path=/head/; revision=171219
Diffstat (limited to 'lib/libc/include')
| -rw-r--r-- | lib/libc/include/libc_private.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/lib/libc/include/libc_private.h b/lib/libc/include/libc_private.h index a8b53fecabb3..de4bbe44151c 100644 --- a/lib/libc/include/libc_private.h +++ b/lib/libc/include/libc_private.h @@ -169,4 +169,27 @@ void _malloc_postfork(void); */ extern void (*__cleanup)(void); +/* + * Get kern.osreldate to detect ABI revisions. Explicitly + * ignores value of $OSVERSION and caches result. Prototypes + * for the wrapped "new" pad-less syscalls are here for now. + */ +extern int __getosreldate(void); +#include <sys/_types.h> +/* Without pad */ +extern __off_t __sys_lseek(int, __off_t, int); +extern int __sys_ftruncate(int, __off_t); +extern int __sys_truncate(const char *, __off_t); +extern __ssize_t __sys_pread(int, void *, __size_t, __off_t); +extern __ssize_t __sys_pwrite(int, const void *, __size_t, __off_t); +extern void * __sys_mmap(void *, __size_t, int, int, int, __off_t); + +/* With pad */ +extern __off_t __sys_freebsd6_lseek(int, int, __off_t, int); +extern int __sys_freebsd6_ftruncate(int, int, __off_t); +extern int __sys_freebsd6_truncate(const char *, int, __off_t); +extern __ssize_t __sys_freebsd6_pread(int, void *, __size_t, int, __off_t); +extern __ssize_t __sys_freebsd6_pwrite(int, const void *, __size_t, int, __off_t); +extern void * __sys_freebsd6_mmap(void *, __size_t, int, int, int, int, __off_t); + #endif /* _LIBC_PRIVATE_H_ */ |