74 lines
3.0 KiB
C
74 lines
3.0 KiB
C
//----------------------------------------------------------------------------//
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// OS on Kaleid //
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// //
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// Desc: System call & userspace related functions //
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// //
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// //
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// Copyright © 2018-2021 The OS/K Team //
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// //
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// This file is part of OS/K. //
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// //
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// OS/K is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 3 of the License, or //
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// any later version. //
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// //
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// OS/K is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY//without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
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//----------------------------------------------------------------------------//
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#include <libbuf.h>
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#include <init/boot.h>
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#include <ke/idt.h>
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#include <ke/syscall.h>
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#include <io/vga.h>
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static error_t (*syscallTable[255])(void*, void*, void*, ISRFrame_t*) = {NULL};
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//
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// Syscall handler that dispatches calls depending of code value
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//
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error_t _KeSyscallHandler( ulong code, void *rdi, void *rsi, void *rdx,
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ISRFrame_t *regs )
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{
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if ((ulong)regs->cs >= (ulong)BtLoaderInfo.codeSegment) {
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DebugLog("System call code %ld from userspace (cs %#x)\n",
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code, regs->cs);
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} else {
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DebugLog("System call call code %ld from kernel (cs %#x)\n",
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code, regs->cs);
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}
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if (code > LATEST_SYSCALL_CODE) {
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return EINVAL;
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}
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return syscallTable[(uchar)code](rdi, rsi, rdx, regs);
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return EOK;
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}
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//
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// Syscalls
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//
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static error_t syscallRead(void *rdi, void *rsi, void *rdx, ISRFrame_t *regs)
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{
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DebugLog("syscallRead attempted\n");
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return EOK;
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}
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//
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// Initializes the syscall table
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//
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void KeEnableSyscalls()
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{
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syscallTable[0] = syscallRead;
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}
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