/* vi: set sw=4 ts=4: */ /* * create_module syscall for uClibc * * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ #include <errno.h> #include <unistd.h> #include <features.h> #include <sys/types.h> #include <sys/syscall.h> #ifdef __NR_create_module unsigned long create_module(const char *name, size_t size); #if defined(__UCLIBC_BROKEN_CREATE_MODULE__) # define __NR___create_module __NR_create_module static inline _syscall2(long, __create_module, const char *, name, size_t, size); /* By checking the value of errno, we know if we have been fooled * by the syscall2 macro making a very high address look like a * negative, so we we fix it up here. */ unsigned long create_module(const char *name, size_t size) { long ret = __create_module(name, size); /* Jump through hoops to fixup error return codes */ if (ret == -1 && errno > 125) { ret = -errno; __set_errno(0); } return ret; } #elif defined(__UCLIBC_SLIGHTLY_BROKEN_CREATE_MODULE__) # define __NR___create_module __NR_create_module /* Alpha doesn't have the same problem, exactly, but a bug in older kernels fails to clear the error flag. Clear it here explicitly. */ static inline _syscall4(unsigned long, __create_module, const char *, name, size_t, size, size_t, dummy, size_t, err); unsigned long create_module(const char *name, size_t size) { return __create_module(name, size, 0, 0); } #else /* Sparc, MIPS, etc don't mistake return values for errors. */ _syscall2(unsigned long, create_module, const char *, name, size_t, size); #endif #else /* !__NR_create_module */ caddr_t create_module(const char *name attribute_unused, size_t size attribute_unused); caddr_t create_module(const char *name attribute_unused, size_t size attribute_unused) { __set_errno(ENOSYS); return (caddr_t)-1; } #endif