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/* 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
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