diff options
Diffstat (limited to 'sys/compat/linux/linux_util.c')
| -rw-r--r-- | sys/compat/linux/linux_util.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/sys/compat/linux/linux_util.c b/sys/compat/linux/linux_util.c new file mode 100644 index 0000000..3412c37 --- /dev/null +++ b/sys/compat/linux/linux_util.c @@ -0,0 +1,243 @@ +/*- + * Copyright (c) 1994 Christos Zoulas + * Copyright (c) 1995 Frank van der Linden + * Copyright (c) 1995 Scott Bartram + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * from: svr4_util.c,v 1.5 1995/01/22 23:44:50 christos Exp + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_compat.h" + +#include <sys/param.h> +#include <sys/bus.h> +#include <sys/fcntl.h> +#include <sys/lock.h> +#include <sys/malloc.h> +#include <sys/linker_set.h> +#include <sys/mutex.h> +#include <sys/namei.h> +#include <sys/proc.h> +#include <sys/syscallsubr.h> +#include <sys/systm.h> +#include <sys/vnode.h> + +#include <machine/stdarg.h> + +#include <compat/linux/linux_util.h> +#ifdef COMPAT_LINUX32 +#include <machine/../linux32/linux.h> +#else +#include <machine/../linux/linux.h> +#endif + +const char linux_emul_path[] = "/compat/linux"; + +/* + * Search an alternate path before passing pathname arguments on to + * system calls. Useful for keeping a separate 'emulation tree'. + * + * If cflag is set, we check if an attempt can be made to create the + * named file, i.e. we check if the directory it should be in exists. + */ +int +linux_emul_convpath(td, path, pathseg, pbuf, cflag, dfd) + struct thread *td; + const char *path; + enum uio_seg pathseg; + char **pbuf; + int cflag; + int dfd; +{ + + return (kern_alternate_path(td, linux_emul_path, path, pathseg, pbuf, + cflag, dfd)); +} + +void +linux_msg(const struct thread *td, const char *fmt, ...) +{ + va_list ap; + struct proc *p; + + p = td->td_proc; + printf("linux: pid %d (%s): ", (int)p->p_pid, p->p_comm); + va_start(ap, fmt); + vprintf(fmt, ap); + va_end(ap); + printf("\n"); +} + +struct device_element +{ + TAILQ_ENTRY(device_element) list; + struct linux_device_handler entry; +}; + +static TAILQ_HEAD(, device_element) devices = + TAILQ_HEAD_INITIALIZER(devices); + +static struct linux_device_handler null_handler = + { "mem", "mem", "null", "null", 1, 3, 1}; + +DATA_SET(linux_device_handler_set, null_handler); + +char * +linux_driver_get_name_dev(device_t dev) +{ + struct device_element *de; + const char *device_name = device_get_name(dev); + + if (device_name == NULL) + return NULL; + TAILQ_FOREACH(de, &devices, list) { + if (strcmp(device_name, de->entry.bsd_driver_name) == 0) + return (de->entry.linux_driver_name); + } + + return NULL; +} + +int +linux_driver_get_major_minor(char *node, int *major, int *minor) +{ + struct device_element *de; + + if (node == NULL || major == NULL || minor == NULL) + return 1; + + if (strlen(node) > strlen("pts/") && + strncmp(node, "pts/", strlen("pts/")) == 0) { + unsigned long devno; + + /* + * Linux checks major and minors of the slave device + * to make sure it's a pty device, so let's make him + * believe it is. + */ + devno = strtoul(node + strlen("pts/"), NULL, 10); + *major = 136 + (devno / 256); + *minor = devno % 256; + return 0; + } + + TAILQ_FOREACH(de, &devices, list) { + if (strcmp(node, de->entry.bsd_device_name) == 0) { + *major = de->entry.linux_major; + *minor = de->entry.linux_minor; + return 0; + } + } + + return 1; +} + +char * +linux_get_char_devices() +{ + struct device_element *de; + char *temp, *string, *last; + char formated[256]; + int current_size = 0, string_size = 1024; + + string = malloc(string_size, M_LINUX, M_WAITOK); + string[0] = '\000'; + last = ""; + TAILQ_FOREACH(de, &devices, list) { + if (!de->entry.linux_char_device) + continue; + temp = string; + if (strcmp(last, de->entry.bsd_driver_name) != 0) { + last = de->entry.bsd_driver_name; + + snprintf(formated, sizeof(formated), "%3d %s\n", + de->entry.linux_major, + de->entry.linux_device_name); + if (strlen(formated) + current_size + >= string_size) { + string_size *= 2; + string = malloc(string_size, + M_LINUX, M_WAITOK); + bcopy(temp, string, current_size); + free(temp, M_LINUX); + } + strcat(string, formated); + current_size = strlen(string); + } + } + + return string; +} + +void +linux_free_get_char_devices(char *string) +{ + free(string, M_LINUX); +} + +static int linux_major_starting = 200; + +int +linux_device_register_handler(struct linux_device_handler *d) +{ + struct device_element *de; + + if (d == NULL) + return (EINVAL); + + de = malloc(sizeof(*de), + M_LINUX, M_WAITOK); + if (d->linux_major < 0) { + d->linux_major = linux_major_starting++; + } + bcopy(d, &de->entry, sizeof(*d)); + + /* Add the element to the list, sorted on span. */ + TAILQ_INSERT_TAIL(&devices, de, list); + + return (0); +} + +int +linux_device_unregister_handler(struct linux_device_handler *d) +{ + struct device_element *de; + + if (d == NULL) + return (EINVAL); + + TAILQ_FOREACH(de, &devices, list) { + if (bcmp(d, &de->entry, sizeof(*d)) == 0) { + TAILQ_REMOVE(&devices, de, list); + free(de, M_LINUX); + return (0); + } + } + + return (EINVAL); +} |
