/* vi: set sw=4 ts=4: */ /* * Copyright (C) 2000-2005 by Erik Andersen <andersen@codepoet.org> * * GNU Lesser General Public License version 2.1 or later. */ #ifndef _LD_SYSCALL_H_ #define _LD_SYSCALL_H_ /* We can't use the real errno in ldso, since it has not yet * been dynamicly linked in yet. */ #include "sys/syscall.h" extern int _dl_errno; #undef __set_errno #define __set_errno(X) {(_dl_errno) = (X);} /* Pull in the arch specific syscall implementation */ #include <dl-syscalls.h> /* For MAP_ANONYMOUS -- differs between platforms */ #define _SYS_MMAN_H 1 #include <bits/mman.h> /* Pull in whatever this particular arch's kernel thinks the kernel version of * struct stat should look like. It turns out that each arch has a different * opinion on the subject, and different kernel revs use different names... */ #if defined(__sparc_v9__) && (__WORDSIZE == 64) #define kernel_stat64 stat #else #define kernel_stat stat #endif #include <bits/kernel_stat.h> #include <bits/kernel_types.h> /* Protection bits. */ #define S_ISUID 04000 /* Set user ID on execution. */ #define S_ISGID 02000 /* Set group ID on execution. */ /* Here are the definitions for some syscalls that are used by the dynamic linker. The idea is that we want to be able to call these before the errno symbol is dynamicly linked, so we use our own version here. Note that we cannot assume any dynamic linking at all, so we cannot return any error codes. We just punt if there is an error. */ #define __NR__dl_exit __NR_exit static __always_inline _syscall1(void, _dl_exit, int, status) #define __NR__dl_close __NR_close static __always_inline _syscall1(int, _dl_close, int, fd) #define __NR__dl_open __NR_open static __always_inline _syscall3(int, _dl_open, const char *, fn, int, flags, __kernel_mode_t, mode) #define __NR__dl_write __NR_write static __always_inline _syscall3(unsigned long, _dl_write, int, fd, const void *, buf, unsigned long, count) #define __NR__dl_read __NR_read static __always_inline _syscall3(unsigned long, _dl_read, int, fd, const void *, buf, unsigned long, count) #define __NR__dl_mprotect __NR_mprotect static __always_inline _syscall3(int, _dl_mprotect, const void *, addr, unsigned long, len, int, prot) #define __NR__dl_stat __NR_stat static __always_inline _syscall2(int, _dl_stat, const char *, file_name, struct stat *, buf) #define __NR__dl_fstat __NR_fstat static __always_inline _syscall2(int, _dl_fstat, int, fd, struct stat *, buf) #define __NR__dl_munmap __NR_munmap static __always_inline _syscall2(int, _dl_munmap, void *, start, unsigned long, length) #ifdef __NR_getxuid # define __NR_getuid __NR_getxuid #endif #define __NR__dl_getuid __NR_getuid static __always_inline _syscall0(uid_t, _dl_getuid) #ifndef __NR_geteuid # define __NR_geteuid __NR_getuid #endif #define __NR__dl_geteuid __NR_geteuid static __always_inline _syscall0(uid_t, _dl_geteuid) #ifdef __NR_getxgid # define __NR_getgid __NR_getxgid #endif #define __NR__dl_getgid __NR_getgid static __always_inline _syscall0(gid_t, _dl_getgid) #ifndef __NR_getegid # define __NR_getegid __NR_getgid #endif #define __NR__dl_getegid __NR_getegid static __always_inline _syscall0(gid_t, _dl_getegid) #ifdef __NR_getxpid # define __NR_getpid __NR_getxpid #endif #define __NR__dl_getpid __NR_getpid static __always_inline _syscall0(gid_t, _dl_getpid) #define __NR__dl_readlink __NR_readlink static __always_inline _syscall3(int, _dl_readlink, const char *, path, char *, buf, size_t, bufsiz) #ifdef __NR_pread64 #define __NR___syscall_pread __NR_pread64 static __always_inline _syscall5(ssize_t, __syscall_pread, int, fd, void *, buf, size_t, count, off_t, offset_hi, off_t, offset_lo) static __always_inline ssize_t _dl_pread(int fd, void *buf, size_t count, off_t offset) { return __syscall_pread(fd, buf, count, offset, offset >> 31); } #elif defined __NR_pread #define __NR___syscall_pread __NR_pread static __always_inline _syscall5(ssize_t, __syscall_pread, int, fd, void *, buf, size_t, count, off_t, offset_hi, off_t, offset_lo) static __always_inline ssize_t _dl_pread(int fd, void *buf, size_t count, off_t offset) { return __syscall_pread(fd, buf, count, __LONG_LONG_PAIR(offset >> 31, offset)); } #endif #ifdef __UCLIBC_HAS_SSP__ # include <sys/time.h> # define __NR__dl_gettimeofday __NR_gettimeofday static __always_inline _syscall2(int, _dl_gettimeofday, struct timeval *, tv, # ifdef __USE_BSD struct timezone * # else void * # endif , tz) #endif /* 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... */ #ifndef MMAP2_PAGE_SHIFT # define MMAP2_PAGE_SHIFT 12 #endif #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; /* 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 *)INLINE_SYSCALL(mmap, 1, buffer); #else # error "Your architecture doesn't seem to provide mmap() !?" #endif } #endif /* _LD_SYSCALL_H_ */