mirror of
git://source.winehq.org/git/wine.git
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510 lines
14 KiB
C
510 lines
14 KiB
C
/*
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* PowerPC signal handling routines
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*
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* Copyright 2002 Marcus Meissner, SuSE Linux AG
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifdef __powerpc__
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#include "config.h"
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#include "wine/port.h"
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#include <errno.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <stdio.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_SYS_PARAM_H
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# include <sys/param.h>
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#endif
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#ifdef HAVE_SYSCALL_H
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# include <syscall.h>
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#else
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# ifdef HAVE_SYS_SYSCALL_H
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# include <sys/syscall.h>
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# endif
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#endif
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#ifdef HAVE_SYS_VM86_H
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# include <sys/vm86.h>
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#endif
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#ifdef HAVE_SYS_SIGNAL_H
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# include <sys/signal.h>
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#endif
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#include "winternl.h"
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#include "winnt.h"
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#include "wine/library.h"
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#include "wine/exception.h"
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#include "selectors.h"
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#include "stackframe.h"
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#include "global.h"
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#include "miscemu.h"
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#include "syslevel.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(seh);
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/***********************************************************************
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* signal context platform-specific definitions
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*/
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typedef struct ucontext SIGCONTEXT;
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#define HANDLER_DEF(name) void name( int __signal, struct siginfo *__siginfo, SIGCONTEXT *__context )
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#define HANDLER_CONTEXT (__context)
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typedef int (*wine_signal_handler)(unsigned int sig);
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static wine_signal_handler handlers[256];
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static sigset_t all_sigs;
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/***********************************************************************
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* dispatch_signal
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*/
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inline static int dispatch_signal(unsigned int sig)
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{
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if (handlers[sig] == NULL) return 0;
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return handlers[sig](sig);
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}
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/***********************************************************************
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* save_context
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*
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* Set the register values from a sigcontext.
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*/
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static void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext )
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{
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#define CX(x,y) context->x = sigcontext->uc_mcontext.regs->y
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#define C(x) CX(Gpr##x,gpr[x])
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C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
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C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
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C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
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C(31);
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CX(Iar,nip);
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CX(Msr,msr);
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CX(Ctr,ctr);
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#undef CX
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/* FIXME: fp regs? */
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/* FIXME: missing pt_regs ...
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unsigned long link;
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unsigned long xer;
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unsigned long ccr;
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unsigned long mq;
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unsigned long trap;
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unsigned long dar;
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unsigned long dsisr;
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*/
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}
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/***********************************************************************
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* restore_context
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*
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* Build a sigcontext from the register values.
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*/
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static void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
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{
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#define CX(x,y) sigcontext->uc_mcontext.regs->y = context->x
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C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
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C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
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C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
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C(31);
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CX(Iar,nip);
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CX(Msr,msr);
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CX(Ctr,ctr);
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#undef CX
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}
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/***********************************************************************
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* save_fpu
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*
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* Set the FPU context from a sigcontext.
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*/
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inline static void save_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
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{
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/* FIXME? */
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}
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/***********************************************************************
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* restore_fpu
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*
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* Restore the FPU context to a sigcontext.
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*/
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inline static void restore_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
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{
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/* FIXME? */
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}
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/**********************************************************************
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* get_fpu_code
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*
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* Get the FPU exception code from the FPU status.
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*/
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static inline DWORD get_fpu_code( const CONTEXT *context )
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{
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DWORD status = 0 /* FIXME */;
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if (status & 0x01) /* IE */
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{
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if (status & 0x40) /* SF */
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return EXCEPTION_FLT_STACK_CHECK;
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else
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return EXCEPTION_FLT_INVALID_OPERATION;
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}
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if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
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if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
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if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
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if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
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if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
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return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
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}
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/***********************************************************************
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* SIGNAL_Unblock
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*
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* Unblock signals. Called from EXC_RtlRaiseException.
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*/
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void SIGNAL_Unblock( void )
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{
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sigprocmask( SIG_UNBLOCK, &all_sigs, NULL );
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}
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/**********************************************************************
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* segv_handler
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*
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* Handler for SIGSEGV and related errors.
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*/
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static HANDLER_DEF(segv_handler)
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{
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CONTEXT context;
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EXCEPTION_RECORD rec;
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DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
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save_context( &context, HANDLER_CONTEXT );
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rec.ExceptionRecord = NULL;
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rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
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rec.ExceptionAddress = (LPVOID)HANDLER_CONTEXT->uc_mcontext.regs->nip;
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rec.NumberParameters = 0;
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switch (__siginfo->si_signo) {
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case SIGSEGV:
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switch ( __siginfo->si_code & 0xffff ) {
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case SEGV_MAPERR:
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case SEGV_ACCERR:
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rec.NumberParameters = 2;
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rec.ExceptionInformation[0] = 0; /* FIXME ? */
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rec.ExceptionInformation[1] = (DWORD)__siginfo->si_addr;
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if (!(page_fault_code=VIRTUAL_HandleFault(__siginfo->si_addr)))
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return;
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rec.ExceptionCode = page_fault_code;
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break;
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default:FIXME("Unhandled SIGSEGV/%x\n",__siginfo->si_code);
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break;
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}
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break;
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case SIGBUS:
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switch ( __siginfo->si_code & 0xffff ) {
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case BUS_ADRALN:
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rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
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break;
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case BUS_ADRERR:
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case BUS_OBJERR:
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/* FIXME: correct for all cases ? */
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rec.NumberParameters = 2;
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rec.ExceptionInformation[0] = 0; /* FIXME ? */
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rec.ExceptionInformation[1] = (DWORD)__siginfo->si_addr;
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if (!(page_fault_code=VIRTUAL_HandleFault(__siginfo->si_addr)))
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return;
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rec.ExceptionCode = page_fault_code;
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break;
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default:FIXME("Unhandled SIGBUS/%x\n",__siginfo->si_code);
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break;
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}
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break;
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case SIGILL:
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switch ( __siginfo->si_code & 0xffff ) {
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case ILL_ILLOPC: /* illegal opcode */
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case ILL_ILLOPN: /* illegal operand */
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case ILL_ILLADR: /* illegal addressing mode */
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case ILL_ILLTRP: /* illegal trap */
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case ILL_COPROC: /* coprocessor error */
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rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
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break;
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case ILL_PRVOPC: /* privileged opcode */
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case ILL_PRVREG: /* privileged register */
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rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
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break;
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case ILL_BADSTK: /* internal stack error */
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rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
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break;
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default:FIXME("Unhandled SIGILL/%x\n",__siginfo->si_code);
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break;
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}
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break;
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}
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EXC_RtlRaiseException( &rec, &context );
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restore_context( &context, HANDLER_CONTEXT );
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}
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/**********************************************************************
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* trap_handler
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*
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* Handler for SIGTRAP.
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*/
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static HANDLER_DEF(trap_handler)
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{
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CONTEXT context;
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EXCEPTION_RECORD rec;
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save_context( &context, HANDLER_CONTEXT );
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rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
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rec.ExceptionRecord = NULL;
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rec.ExceptionAddress = (LPVOID)__context->uc_mcontext.regs->nip;
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rec.NumberParameters = 0;
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/* FIXME: check if we might need to modify PC */
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switch (__siginfo->si_code & 0xffff) {
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case TRAP_BRKPT:
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rec.ExceptionCode = EXCEPTION_BREAKPOINT;
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break;
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case TRAP_TRACE:
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rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
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break;
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}
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EXC_RtlRaiseException( &rec, &context );
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restore_context( &context, HANDLER_CONTEXT );
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}
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/**********************************************************************
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* fpe_handler
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*
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* Handler for SIGFPE.
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*/
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static HANDLER_DEF(fpe_handler)
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{
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CONTEXT context;
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EXCEPTION_RECORD rec;
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/*save_fpu( &context, HANDLER_CONTEXT );*/
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save_context( &context, HANDLER_CONTEXT );
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switch ( __siginfo->si_code & 0xffff ) {
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case FPE_FLTSUB:
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rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
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break;
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case FPE_INTDIV:
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rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
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break;
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case FPE_INTOVF:
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rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
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break;
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case FPE_FLTDIV:
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rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
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break;
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case FPE_FLTOVF:
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rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
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break;
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case FPE_FLTUND:
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rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
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break;
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case FPE_FLTRES:
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rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
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break;
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case FPE_FLTINV:
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default:
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rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
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break;
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}
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rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
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rec.ExceptionRecord = NULL;
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rec.ExceptionAddress = (LPVOID)__context->uc_mcontext.regs->nip;
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rec.NumberParameters = 0;
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EXC_RtlRaiseException( &rec, &context );
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restore_context( &context, HANDLER_CONTEXT );
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/*restore_fpu( &context, HANDLER_CONTEXT );*/
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}
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/**********************************************************************
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* int_handler
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*
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* Handler for SIGINT.
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*/
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static HANDLER_DEF(int_handler)
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{
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if (!dispatch_signal(SIGINT))
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{
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EXCEPTION_RECORD rec;
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CONTEXT context;
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save_context( &context, HANDLER_CONTEXT );
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rec.ExceptionCode = CONTROL_C_EXIT;
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rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
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rec.ExceptionRecord = NULL;
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rec.ExceptionAddress = (LPVOID)context.Iar;
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rec.NumberParameters = 0;
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EXC_RtlRaiseException( &rec, &context );
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restore_context( &context, HANDLER_CONTEXT );
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}
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}
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/***********************************************************************
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* set_handler
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*
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* Set a signal handler
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*/
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static int set_handler( int sig, int have_sigaltstack, void (*func)() )
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{
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struct sigaction sig_act;
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sig_act.sa_sigaction = func;
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sigemptyset( &sig_act.sa_mask );
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sigaddset( &sig_act.sa_mask, SIGINT );
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sigaddset( &sig_act.sa_mask, SIGALRM );
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sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
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#ifdef SA_ONSTACK
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if (have_sigaltstack) sig_act.sa_flags |= SA_ONSTACK;
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#endif
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return sigaction( sig, &sig_act, NULL );
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}
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/***********************************************************************
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* __wine_set_signal_handler (NTDLL.@)
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*/
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int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
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{
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if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
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if (handlers[sig] != NULL) return -2;
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handlers[sig] = wsh;
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return 0;
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}
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/**********************************************************************
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* SIGNAL_Init
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*/
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BOOL SIGNAL_Init(void)
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{
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int have_sigaltstack = 0;
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#ifdef HAVE_SIGALTSTACK
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struct sigaltstack ss;
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if ((ss.ss_sp = NtCurrentTeb()->signal_stack))
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{
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ss.ss_size = SIGNAL_STACK_SIZE;
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ss.ss_flags = 0;
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if (!sigaltstack(&ss, NULL)) have_sigaltstack = 1;
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}
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#endif /* HAVE_SIGALTSTACK */
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sigfillset( &all_sigs );
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if (set_handler( SIGINT, have_sigaltstack, (void (*)())int_handler ) == -1) goto error;
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if (set_handler( SIGFPE, have_sigaltstack, (void (*)())fpe_handler ) == -1) goto error;
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if (set_handler( SIGSEGV, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
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if (set_handler( SIGILL, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
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#ifdef SIGBUS
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if (set_handler( SIGBUS, have_sigaltstack, (void (*)())segv_handler ) == -1) goto error;
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#endif
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#ifdef SIGTRAP
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if (set_handler( SIGTRAP, have_sigaltstack, (void (*)())trap_handler ) == -1) goto error;
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#endif
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return TRUE;
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error:
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perror("sigaction");
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return FALSE;
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}
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/**********************************************************************
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* SIGNAL_Reset
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*/
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void SIGNAL_Reset(void)
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{
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sigset_t block_set;
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/* block the async signals */
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sigemptyset( &block_set );
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sigaddset( &block_set, SIGALRM );
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sigaddset( &block_set, SIGIO );
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sigaddset( &block_set, SIGHUP );
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sigaddset( &block_set, SIGUSR2 );
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sigprocmask( SIG_BLOCK, &block_set, NULL );
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/* restore default handlers */
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signal( SIGINT, SIG_DFL );
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signal( SIGFPE, SIG_DFL );
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signal( SIGSEGV, SIG_DFL );
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signal( SIGILL, SIG_DFL );
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#ifdef SIGBUS
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signal( SIGBUS, SIG_DFL );
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#endif
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#ifdef SIGTRAP
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signal( SIGTRAP, SIG_DFL );
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#endif
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}
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/**********************************************************************
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* __wine_enter_vm86 (NTDLL.@)
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*/
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void __wine_enter_vm86( CONTEXT *context )
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{
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MESSAGE("vm86 mode not supported on this platform\n");
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}
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/**********************************************************************
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* DbgBreakPoint (NTDLL.@)
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*/
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void WINAPI DbgBreakPoint(void)
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{
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kill(getpid(), SIGTRAP);
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}
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/**********************************************************************
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* DbgUserBreakPoint (NTDLL.@)
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*/
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void WINAPI DbgUserBreakPoint(void)
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{
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kill(getpid(), SIGTRAP);
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}
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#endif /* __powerpc__ */
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