rosetta/lib/libc/core/errno/errno.c

#include <errno.h>
#include <mango/log.h>
#include <mango/status.h>

static int __errno = 32;

int __attribute__((weak)) * __errno_location(void)
{
	kern_log("using builtin errno");
	return &__errno;
}

#if defined(BUILD_STATIC)
int __set_errno(int err)
{
	return -err;
}
#endif

#if defined(BUILD_SHARED)
int __set_errno(int err)
{
	/* TODO */
	*__errno_location() = err;
	return -1;
}
#endif

int __errno_from_kern_status(unsigned int err)
{
	switch (err) {
	case KERN_OK:
		return SUCCESS;
	case KERN_UNIMPLEMENTED:
		return ENOSYS;
	case KERN_NAME_EXISTS:
		return EEXIST;
	case KERN_INVALID_ARGUMENT:
		return EINVAL;
	case KERN_UNSUPPORTED:
		return ENOTSUP;
	case KERN_NO_MEMORY:
		return ENOMEM;
	case KERN_NO_ENTRY:
		return ENOENT;
	case KERN_WOULD_BLOCK:
		return EWOULDBLOCK;
	case KERN_NO_DEVICE:
		return ENODEV;
	case KERN_DEVICE_STUCK:
	case KERN_IO_ERROR:
		return EIO;
	case KERN_FATAL_ERROR:
		return ENXIO;
	case KERN_BAD_STATE:
		return EPERM;
	case KERN_MEMORY_FAULT:
		return EFAULT;
	case KERN_ACCESS_DENIED:
		return EACCES;
	default:
		return EINVAL;
	}
}