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- /* -*- mode:c; c-file-style:"k&r"; c-basic-offset: 4; tab-width:4; indent-tabs-mode:nil; mode:auto-fill; fill-column:78; -*- */
- /* vim: set ts=4 sw=4 et tw=78 fo=cqt wm=0: */
- /* Copyright (C) 2014 OSCAR lab, Stony Brook University
- This file is part of Graphene Library OS.
- Graphene Library OS is free software: you can redistribute it and/or
- modify it under the terms of the GNU General Public License
- as published by the Free Software Foundation, either version 3 of the
- License, or (at your option) any later version.
- Graphene Library OS is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- /*
- * db_exception.c
- *
- * This file contains APIs to set up handlers of exceptions issued by the
- * host, and the methods to pass the exceptions to the upcalls.
- */
- #include "pal_defs.h"
- #include "pal.h"
- #include "pal_internal.h"
- #include "pal_error.h"
- #include "api.h"
- #include "linux_list.h"
- PAL_BOL
- DkSetExceptionHandler (void (*handler) (PAL_PTR, PAL_NUM, PAL_CONTEXT *),
- PAL_NUM event, PAL_FLG flags)
- {
- ENTER_PAL_CALL(DkSetExceptionHandler);
- if (!handler || event <= 0 || event > PAL_EVENT_NUM_BOUND) {
- _DkRaiseFailure(PAL_ERROR_INVAL);
- LEAVE_PAL_CALL_RETURN(PAL_FALSE);
- }
- int ret = _DkExceptionHandlers[event](event, handler, flags);
- if (ret < 0) {
- _DkRaiseFailure(-ret);
- LEAVE_PAL_CALL_RETURN(PAL_FALSE);
- }
- LEAVE_PAL_CALL_RETURN(PAL_TRUE);
- }
- void DkExceptionReturn (PAL_PTR event)
- {
- _DkExceptionReturn(event);
- }
- #ifndef NO_HANDLE_COMPATIBILITY
- unsigned long _DkHandleCompatibilityException (unsigned long syscallno,
- unsigned long args[6])
- {
- printf("compatibility support: detected an unintercepted system call\n");
- if (!pal_state.syscall_sym_addr)
- _DkProcessExit(-1);
- unsigned long ret;
- asm volatile ("movq %6, %%r10\r\n"
- "movq %7, %%r8\r\n"
- "movq %8, %%r9\r\n"
- "callq *%1\r\n"
- "movq %%rax, %0\r\n"
- : "=a" (ret)
- : "r"(pal_state.syscall_sym_addr),
- "a" (syscallno),
- "D" (args[0]),
- "S" (args[1]),
- "d" (args[2]),
- "r" (args[3]),
- "r" (args[4]),
- "r" (args[5])
- : "memory", "r10", "r8", "r9");
- return ret;
- }
- #endif
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