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| author | Ulrich Drepper <drepper@redhat.com> | 2001-04-20 04:53:42 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2001-04-20 04:53:42 +0000 |
| commit | 821fcfd5c3c0f3799b37fded7321199cdceade7e (patch) | |
| tree | cae5927e11059055d5aa6467d94df9158549feed | |
| parent | aa29e3a242d513616ccb74cf00ab8083b73c03bd (diff) | |
| download | glibc-821fcfd5c3c0f3799b37fded7321199cdceade7e.zip glibc-821fcfd5c3c0f3799b37fded7321199cdceade7e.tar.gz glibc-821fcfd5c3c0f3799b37fded7321199cdceade7e.tar.bz2 | |
(__mmap64): Optimize a bit.
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/mmap64.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/mmap64.c b/sysdeps/unix/sysv/linux/powerpc/mmap64.c index fc0c959..4b3e60d 100644 --- a/sysdeps/unix/sysv/linux/powerpc/mmap64.c +++ b/sysdeps/unix/sysv/linux/powerpc/mmap64.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1999, 2000 Free Software Foundation, Inc. +/* Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek <jakub@redhat.com>, 1999. @@ -39,28 +39,32 @@ static int have_no_mmap2; #endif #endif -__ptr_t -__mmap64 (__ptr_t addr, size_t len, int prot, int flags, int fd, off64_t offset) +void * +__mmap64 (void *addr, size_t len, int prot, int flags, int fd, off64_t offset) { + if (! (offset & ((1 << PAGE_SHIFT)-1))) + { + __set_errno (EINVAL); + return MAP_FAILED; + } #ifdef __NR_mmap2 - if ( # ifndef __ASSUME_MMAP2_SYSCALL - ! have_no_mmap2 && + if (! have_no_mmap2) # endif - ! (offset & ((1 << PAGE_SHIFT)-1))) { # ifndef __ASSUME_MMAP2_SYSCALL int saved_errno = errno; # endif - __ptr_t result; - __ptrvalue (result) = INLINE_SYSCALL (mmap2, 6, __ptrvalue (addr), len, prot, - flags, fd, (off_t) (offset >> PAGE_SHIFT)); + void *result; + __ptrvalue (result) = INLINE_SYSCALL (mmap2, 6, __ptrvalue (addr), len, + prot, flags, fd, + (off_t) (offset >> PAGE_SHIFT)); # if __BOUNDED_POINTERS__ __ptrlow (result) = __ptrvalue (result); __ptrhigh (result) = __ptrvalue (result) + len; # endif # ifndef __ASSUME_MMAP2_SYSCALL - if (result != (__ptr_t) -1 || errno != ENOSYS) + if (result != MAP_FAILED || errno != ENOSYS) # endif return result; @@ -70,6 +74,7 @@ __mmap64 (__ptr_t addr, size_t len, int prot, int flags, int fd, off64_t offset) # endif } #endif +#ifndef __ASSUME_MMAP2_SYSCALL if (offset != (off_t) offset || (offset + len) != (off_t) (offset + len)) { __set_errno (EINVAL); @@ -77,6 +82,7 @@ __mmap64 (__ptr_t addr, size_t len, int prot, int flags, int fd, off64_t offset) } return __mmap (addr, len, prot, flags, fd, (off_t) offset); +#endif } weak_alias (__mmap64, mmap64) |