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Compare Revisions

• This comparison shows the changes necessary to convert path

  → /tags/0.1.1/kernel/generic/src/syscall @ 1963

  → /tags/0.1.1/kernel/generic/src/syscall @ 1968

  ↔ Reverse comparison

• Compare Path:	Rev

  With Path:	Rev

Ignore whitespace Rev 1963 → Rev 1968

/tags/0.1.1/kernel/generic/src/syscall/syscall.c
0,0 → 1,115
/*
* Copyright (C) 2005 Martin Decky
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - 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.
*/
/**
* @file syscall.c
* @brief Syscall table and syscall wrappers.
*/
#include <syscall/syscall.h>
#include <proc/thread.h>
#include <proc/task.h>
#include <mm/as.h>
#include <print.h>
#include <putchar.h>
#include <errno.h>
#include <arch.h>
#include <debug.h>
#include <ipc/sysipc.h>
#include <synch/futex.h>
#include <ddi/ddi.h>
#include <security/cap.h>
#include <syscall/copy.h>
#include <sysinfo/sysinfo.h>
static __native sys_io(int fd, const void * buf, size_t count) {
// TODO: buf sanity checks and a lot of other stuff ...
size_t i;
for (i = 0; i < count; i++)
putchar(((char *) buf)[i]);
return count;
}
/** Dispatch system call */
__native syscall_handler(__native a1, __native a2, __native a3,
__native a4, __native id)
{
if (id < SYSCALL_END)
return syscall_table[id](a1,a2,a3,a4);
else
panic("Undefined syscall %d", id);
}
syshandler_t syscall_table[SYSCALL_END] = {
sys_io,
sys_tls_set,
/* Thread and task related syscalls. */
sys_thread_create,
sys_thread_exit,
sys_task_get_id,
/* Synchronization related syscalls. */
sys_futex_sleep_timeout,
sys_futex_wakeup,
/* Address space related syscalls. */
sys_as_area_create,
sys_as_area_resize,
sys_as_area_destroy,
/* IPC related syscalls. */
sys_ipc_call_sync_fast,
sys_ipc_call_sync,
sys_ipc_call_async_fast,
sys_ipc_call_async,
sys_ipc_answer_fast,
sys_ipc_answer,
sys_ipc_forward_fast,
sys_ipc_wait_for_call,
sys_ipc_hangup,
sys_ipc_register_irq,
sys_ipc_unregister_irq,
/* Capabilities related syscalls. */
sys_cap_grant,
sys_cap_revoke,
/* DDI related syscalls. */
sys_physmem_map,
sys_iospace_enable,
sys_preempt_control,
/* Sysinfo syscalls */
sys_sysinfo_valid,
sys_sysinfo_value
};

/tags/0.1.1/kernel/generic/src/syscall/copy.c
0,0 → 1,125
/*
* Copyright (C) 2006 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - 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.
*/
/**
* @file copy.c
* @brief Copying between kernel and userspace.
*
* This file contains sanitized functions for copying data
* between kernel and userspace.
*/
#include <syscall/copy.h>
#include <proc/thread.h>
#include <mm/as.h>
#include <macros.h>
#include <arch.h>
#include <errno.h>
#include <typedefs.h>
/** Copy data from userspace to kernel.
*
* Provisions are made to return value even after page fault.
*
* This function can be called only from syscall.
*
* @param dst Destination kernel address.
* @param uspace_src Source userspace address.
* @param size Size of the data to be copied.
*
* @return 0 on success or error code from @ref errno.h.
*/
int copy_from_uspace(void *dst, const void *uspace_src, size_t size)
{
ipl_t ipl;
int rc;
ASSERT(THREAD);
ASSERT(!THREAD->in_copy_from_uspace);
if (!KERNEL_ADDRESS_SPACE_SHADOWED) {
if (overlaps((__address) uspace_src, size,
KERNEL_ADDRESS_SPACE_START, KERNEL_ADDRESS_SPACE_END-KERNEL_ADDRESS_SPACE_START)) {
/*
* The userspace source block conflicts with kernel address space.
*/
return EPERM;
}
}
ipl = interrupts_disable();
THREAD->in_copy_from_uspace = true;
rc = memcpy_from_uspace(dst, uspace_src, size);
THREAD->in_copy_from_uspace = false;
interrupts_restore(ipl);
return !rc ? EPERM : 0;
}
/** Copy data from kernel to userspace.
*
* Provisions are made to return value even after page fault.
*
* This function can be called only from syscall.
*
* @param uspace_dst Destination userspace address.
* @param uspace_src Source kernel address.
* @param size Size of the data to be copied.
*
* @return 0 on success or error code from @ref errno.h.
*/
int copy_to_uspace(void *uspace_dst, const void *src, size_t size)
{
ipl_t ipl;
int rc;
ASSERT(THREAD);
ASSERT(!THREAD->in_copy_from_uspace);
if (!KERNEL_ADDRESS_SPACE_SHADOWED) {
if (overlaps((__address) uspace_dst, size,
KERNEL_ADDRESS_SPACE_START, KERNEL_ADDRESS_SPACE_END-KERNEL_ADDRESS_SPACE_START)) {
/*
* The userspace destination block conflicts with kernel address space.
*/
return EPERM;
}
}
ipl = interrupts_disable();
THREAD->in_copy_from_uspace = true;
rc = memcpy_to_uspace(uspace_dst, src, size);
THREAD->in_copy_from_uspace = false;
interrupts_restore(ipl);
return !rc ? EPERM : 0;
}