diff options
Diffstat (limited to 'ldso/include/dl-syscall.h')
| -rw-r--r-- | ldso/include/dl-syscall.h | 62 |
1 files changed, 22 insertions, 40 deletions
diff --git a/ldso/include/dl-syscall.h b/ldso/include/dl-syscall.h index 20d443edf..0be937b5e 100644 --- a/ldso/include/dl-syscall.h +++ b/ldso/include/dl-syscall.h @@ -135,30 +135,6 @@ static __always_inline _syscall2(int, _dl_gettimeofday, struct timeval *, tv, # endif #endif - -/* handle all the fun mmap intricacies */ -#define MAP_FAILED ((void *) -1) -#if (defined(__UCLIBC_MMAP_HAS_6_ARGS__) && defined(__NR_mmap)) || !defined(__NR_mmap2) -# define _dl_MAX_ERRNO 4096 -# define _dl_mmap_check_error(__res) \ - (((long)__res) < 0 && ((long)__res) >= -_dl_MAX_ERRNO) -#else -# define _dl_mmap_check_error(X) (((void *)X) == MAP_FAILED) -#endif - -/* first try mmap(), syscall6() style */ -#if defined(__UCLIBC_MMAP_HAS_6_ARGS__) && defined(__NR_mmap) - -# define __NR__dl_mmap __NR_mmap -static __always_inline _syscall6(void *, _dl_mmap, void *, start, size_t, length, - int, prot, int, flags, int, fd, off_t, offset); -/* then try mmap2() */ -#elif defined(__NR_mmap2) && !defined (__mcoldfire__) - -# define __NR___syscall_mmap2 __NR_mmap2 -static __always_inline _syscall6(__ptr_t, __syscall_mmap2, __ptr_t, addr, size_t, len, - int, prot, int, flags, int, fd, off_t, offset); - /* Some architectures always use 12 as page shift for mmap2() eventhough the * real PAGE_SHIFT != 12. Other architectures use the same value as * PAGE_SHIFT... @@ -167,35 +143,41 @@ static __always_inline _syscall6(__ptr_t, __syscall_mmap2, __ptr_t, addr, size_t # define MMAP2_PAGE_SHIFT 12 #endif -static __always_inline void * _dl_mmap(void * addr, unsigned long size, int prot, - int flags, int fd, unsigned long offset) +#define MAP_FAILED ((void *) -1) +#define _dl_mmap_check_error(X) (((void *)X) == MAP_FAILED) + +static __always_inline +void *_dl_mmap(void *addr, unsigned long size, int prot, + int flags, int fd, unsigned long offset) { +#if defined(__UCLIBC_MMAP_HAS_6_ARGS__) && defined(__NR_mmap) + /* first try mmap(), syscall6() style */ + return (void *)INLINE_SYSCALL(mmap, 6, addr, size, prot, flags, fd, offset); + +#elif defined(__NR_mmap2) && !defined (__mcoldfire__) + /* then try mmap2() */ + unsigned long shifted; + if (offset & ((1 << MMAP2_PAGE_SHIFT) - 1)) return MAP_FAILED; - return __syscall_mmap2(addr, size, prot, flags, - fd, (off_t) (offset >> MMAP2_PAGE_SHIFT)); -} -/* finally, fall back to mmap(), syscall1() style */ -#elif defined(__NR_mmap) -# define __NR__dl_mmap_real __NR_mmap -static __always_inline _syscall1(void *, _dl_mmap_real, unsigned long *, buffer); -static __always_inline void * _dl_mmap(void * addr, unsigned long size, int prot, - int flags, int fd, unsigned long offset) -{ - unsigned long buffer[6]; + /* gcc needs help with putting things onto the stack */ + shifted = offset >> MMAP2_PAGE_SHIFT; + return (void *)INLINE_SYSCALL(mmap2, 6, addr, size, prot, flags, fd, shifted); +#elif defined(__NR_mmap) + /* finally, fall back to mmap(), syscall1() style */ + unsigned long buffer[6]; buffer[0] = (unsigned long) addr; buffer[1] = (unsigned long) size; buffer[2] = (unsigned long) prot; buffer[3] = (unsigned long) flags; buffer[4] = (unsigned long) fd; buffer[5] = (unsigned long) offset; - return (void *) _dl_mmap_real(buffer); -} - + return (void *)INLINE_SYSCALL(mmap, 1, buffer); #else # error "Your architecture doesn't seem to provide mmap() !?" #endif +} #endif /* _LD_SYSCALL_H_ */ |