372 lines
7.9 KiB
C
372 lines
7.9 KiB
C
/*
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* Copyright 2010 Stefan Lankes, Chair for Operating Systems,
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* RWTH Aachen University
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of MetalSVM.
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*/
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#include <metalsvm/stdarg.h>
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#include <metalsvm/stdio.h>
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#include <metalsvm/syscall.h>
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#include <metalsvm/tasks.h>
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#include <metalsvm/string.h>
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#include <metalsvm/errno.h>
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#include <metalsvm/spinlock.h>
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#include <metalsvm/time.h>
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#include <lwip/opt.h>
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#if defined(CONFIG_LWIP) && LWIP_SOCKET
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#include <lwip/mem.h>
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#include <lwip/raw.h>
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#include <lwip/icmp.h>
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#include <lwip/netif.h>
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#include <lwip/sys.h>
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#include <lwip/timers.h>
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#include <lwip/inet_chksum.h>
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#include <lwip/ip.h>
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#include <lwip/sockets.h>
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#include <lwip/inet.h>
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#include <lwip/err.h>
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#endif
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static int get_fildes(){
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int fd;
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for (fd = 0; fd < NR_OPEN; fd++) {
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if (per_core(current_task)->fildes_table[fd].node == NULL) {
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return fd;
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}
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}
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/* can't get any free fd */
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return -EMFILE;
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}
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static int sys_open(const char* name, int flags, int mode)
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{
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int fd, check;
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fildes_t* file = NULL;
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fd = get_fildes();
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/* validate the fd */
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if (fd < 0)
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return fd;
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file = &(per_core(current_task)->fildes_table[fd]);
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file->offset = 0;
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file->mode = mode;
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file->flags = flags;
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check = open_fs(file, (char*) name);
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if (check < 0) {
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/* file doesn't exist! */
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file->node = NULL;
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return check;
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}
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return fd;
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}
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#if defined(CONFIG_LWIP) && LWIP_SOCKET
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static int sys_socket(int domain, int type, int protocol)
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{
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int fd;
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fildes_t* file = NULL;
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fd = get_fildes();
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/* validate the fd */
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if (fd < 0)
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return fd;
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file = &(per_core(current_task)->fildes_table[fd]);
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file->offset = lwip_socket(domain, type, protocol);
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file->mode = 0;
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file->flags = 0;
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file->node = findnode_fs("/dev/socket");
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return fd;
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}
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static int sys_accept(int s, struct sockaddr* addr, socklen_t* addrlen)
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{
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int fd;
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fildes_t* file = NULL;
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fd = get_fildes();
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/* validate the fd */
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if (fd < 0)
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return fd;
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file = &(per_core(current_task)->fildes_table[fd]);
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file->offset = lwip_accept(s, addr, addrlen);
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file->mode = 0;
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file->flags = 0;
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file->node = findnode_fs("/dev/socket");
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return fd;
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}
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#endif
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static int sys_close(int fd)
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{
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fildes_t* file = &(per_core(current_task)->fildes_table[fd]);
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close_fs(file);
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file->node = NULL;
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file->offset = 0;
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file->mode = 0;
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file->flags = 0;
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return 0;
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}
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static int sys_lseek(int fd, off_t pos, int origin)
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{
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int ret = -EINVAL;
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fildes_t* file = &(per_core(current_task)->fildes_table[fd]);
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if (BUILTIN_EXPECT(!((file->node->type == FS_FILE)
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|| (file->node->type == FS_CHARDEVICE)), 0))
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return -EINVAL;
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switch(origin)
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{
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case SEEK_SET: { /* set file offset to offset */
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file->offset = pos;
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ret = 0;
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break;
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}
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case SEEK_CUR: { /* set file offset to current plus offset */
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ret = pos + file->offset;
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break;
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}
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case SEEK_END: { /* set file offset to EOF plus offset */
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file->offset = pos + file->node->block_size;
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ret = 0;
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break;
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}
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default:
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static int sys_sbrk(int incr)
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{
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task_t* task = per_core(current_task);
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vma_t* tmp = NULL;
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int ret;
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spinlock_lock(&task->vma_lock);
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tmp = task->vma_list;
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while(tmp && !((task->end_heap >= tmp->start) && (task->end_heap <= tmp->end)))
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tmp = tmp->next;
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ret = (int) task->end_heap;
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task->end_heap += incr;
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if (task->end_heap < task->start_heap)
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task->end_heap = task->start_heap;
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// resize virtual memory area
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if (tmp && (tmp->end <= task->end_heap))
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tmp->end = task->end_heap;
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spinlock_unlock(&task->vma_lock);
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return ret;
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}
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int syscall_handler(uint32_t sys_nr, ...)
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{
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int ret = -EINVAL;
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va_list vl;
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check_workqueues();
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va_start(vl, sys_nr);
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switch(sys_nr)
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{
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case __NR_exit:
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sys_exit(va_arg(vl, uint32_t));
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ret = 0;
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break;
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case __NR_write: {
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int fd = va_arg(vl, int);
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const char* buf = va_arg(vl, const char*);
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size_t len = va_arg(vl, size_t);
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if (fd >= 0)
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ret = write_fs(&(per_core(current_task)->fildes_table[fd]),
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(uint8_t*)buf, len);
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break;
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}
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case __NR_open: {
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const char* name = va_arg(vl, const char*);
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int flags = va_arg(vl, int);
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int mode = va_arg(vl, int);
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ret = sys_open(name, flags, mode);
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break;
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}
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case __NR_close: {
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int fd = va_arg(vl, int);
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if (fd >= 0)
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ret = sys_close(fd);
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break;
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}
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case __NR_read: {
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int fd = va_arg(vl, int);
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const char* buf = va_arg(vl, const char*);
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size_t len = va_arg(vl, size_t);
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if (fd >= 0)
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ret = read_fs(&(per_core(current_task)->fildes_table[fd]),
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(uint8_t*)buf, len);
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break;
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}
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case __NR_lseek: {
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int fd = va_arg(vl, int);
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off_t pos = va_arg(vl, off_t);
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int origin = va_arg(vl, int);
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if (fd >= 0)
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ret = sys_lseek(fd, pos, origin);
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break;
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}
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case __NR_sbrk: {
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int incr = va_arg(vl, int);
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ret = sys_sbrk(incr);
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break;
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}
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case __NR_getpid:
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ret = per_core(current_task)->id;
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break;
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case __NR_fork:
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ret = sys_fork();
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break;
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case __NR_wait: {
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int32_t* status = va_arg(vl, int32_t*);
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ret = wait(status);
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break;
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}
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case __NR_execve: {
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const char* name = va_arg(vl, const char*);
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char** argv = va_arg(vl, char**);
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char** env = va_arg(vl, char**);
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ret = sys_execve(name, argv, env);
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break;
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}
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case __NR_times: {
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struct tms* buffer = va_arg(vl, struct tms*);
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clock_t* clock = va_arg(vl, clock_t*);
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ret = sys_times(buffer, clock);
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break;
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}
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#if defined(CONFIG_LWIP) && LWIP_SOCKET
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case __NR_closesocket: {
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int fd = va_arg(vl, int);
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if (fd < 0) {
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ret = -ENOTSOCK;
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break;
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}
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ret = lwip_close(per_core(current_task)->fildes_table[fd].offset);
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if (ret < 0)
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ret = -errno;
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break;
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}
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case __NR_socket: {
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int domain = va_arg(vl, int);
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int type = va_arg(vl, int);
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int protocol = va_arg(vl, int);
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ret = sys_socket(domain, type, protocol);
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break;
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}
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case __NR_connect: {
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int fd = va_arg(vl, int);
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const struct sockaddr* name = va_arg(vl, const struct sockaddr*);
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socklen_t namelen = va_arg(vl, socklen_t);
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if (per_core(current_task)->fildes_table[fd].offset < 0) {
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ret = -ENOTSOCK;
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break;
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}
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//kprintf("lwip_connect: %p with lenght %i and Socket %i", name, namelen, per_core(current_task)->fildes_table[fd].offset);
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ret = lwip_connect(per_core(current_task)->fildes_table[fd].offset, name, namelen);
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if (ret < 0)
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ret = -errno;
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break;
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}
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case __NR_bind: {
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int fd = va_arg(vl, int);
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const struct sockaddr* name = va_arg(vl, const struct sockaddr*);
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socklen_t namelen = va_arg(vl, socklen_t);
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if (per_core(current_task)->fildes_table[fd].offset < 0) {
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ret = -ENOTSOCK;
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break;
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}
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ret = lwip_bind(per_core(current_task)->fildes_table[fd].offset, name, namelen);
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if (ret < 0)
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ret = -errno;
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break;
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}
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case __NR_listen: {
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int fd = va_arg(vl, int);
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int backlog = va_arg(vl, int);
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if (per_core(current_task)->fildes_table[fd].offset < 0) {
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ret = -ENOTSOCK;
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break;
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}
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ret = lwip_listen(per_core(current_task)->fildes_table[fd].offset, backlog);
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if (ret < 0)
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ret = -errno;
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break;
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}
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case __NR_accept: {
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int fd = va_arg(vl, int);
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struct sockaddr* addr = va_arg(vl, struct sockaddr*);
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socklen_t* addrlen = va_arg(vl, socklen_t*);
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if (per_core(current_task)->fildes_table[fd].offset < 0) {
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ret = -ENOTSOCK;
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break;
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}
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ret = sys_accept(per_core(current_task)->fildes_table[fd].offset, addr, addrlen);
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if (ret < 0)
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ret = -errno;
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break;
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}
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#endif
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default:
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kputs("invalid system call\n");
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ret = -ENOSYS;
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break;
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};
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va_end(vl);
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return ret;
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}
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