703 lines
19 KiB
C
703 lines
19 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 <assert.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <stdarg.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 "windef.h"
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#include "winternl.h"
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#include "wine/library.h"
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#include "wine/exception.h"
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#include "ntdll_misc.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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#ifdef linux
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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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/* All Registers access - only for local access */
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# define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
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/* Gpr Registers access */
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# define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
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# define IAR_sig(context) REG_sig(nip, context) /* Program counter */
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# define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */
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# define CTR_sig(context) REG_sig(ctr, context) /* Count register */
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# define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */
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# define LR_sig(context) REG_sig(link, context) /* Link register */
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# define CR_sig(context) REG_sig(ccr, context) /* Condition register */
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/* Float Registers access */
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# define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num])
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# define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4)))
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/* Exception Registers access */
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# define DAR_sig(context) REG_sig(dar, context)
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# define DSISR_sig(context) REG_sig(dsisr, context)
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# define TRAP_sig(context) REG_sig(trap, context)
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#endif /* linux */
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#ifdef __APPLE__
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# include <sys/ucontext.h>
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# include <sys/types.h>
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# include <signal.h>
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typedef siginfo_t siginfo;
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typedef struct ucontext SIGCONTEXT;
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# define HANDLER_DEF(name) void name( int __signal, siginfo *__siginfo, SIGCONTEXT *__context )
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# define HANDLER_CONTEXT (__context)
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/* All Registers access - only for local access */
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# define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
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# define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
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# define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
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# define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
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/* Gpr Registers access */
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# define GPR_sig(reg_num, context) REG_sig(r##reg_num, context)
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# define IAR_sig(context) REG_sig(srr0, context) /* Program counter */
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# define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */
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# define CTR_sig(context) REG_sig(ctr, context)
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# define XER_sig(context) REG_sig(xer, context) /* Link register */
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# define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */
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# define CR_sig(context) REG_sig(cr, context) /* Condition register */
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/* Float Registers access */
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# define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
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# define FPSCR_sig(context) FLOATREG_sig(fpscr, context)
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/* Exception Registers access */
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# define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */
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# define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
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# define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */
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/* Signal defs : Those are undefined on darwin
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SIGBUS
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#undef BUS_ADRERR
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#undef BUS_OBJERR
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SIGILL
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#undef ILL_ILLOPN
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#undef ILL_ILLTRP
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#undef ILL_ILLADR
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#undef ILL_COPROC
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#undef ILL_PRVREG
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#undef ILL_BADSTK
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SIGTRAP
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#undef TRAP_BRKPT
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#undef TRAP_TRACE
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SIGFPE
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*/
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#endif /* __APPLE__ */
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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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/***********************************************************************
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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 C(x) context->Gpr##x = GPR_sig(x,sigcontext)
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/* Save Gpr registers */
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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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#undef C
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context->Iar = IAR_sig(sigcontext); /* Program Counter */
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context->Msr = MSR_sig(sigcontext); /* Machine State Register (Supervisor) */
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context->Ctr = CTR_sig(sigcontext);
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context->Xer = XER_sig(sigcontext);
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context->Lr = LR_sig(sigcontext);
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context->Cr = CR_sig(sigcontext);
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/* Saving Exception regs */
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context->Dar = DAR_sig(sigcontext);
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context->Dsisr = DSISR_sig(sigcontext);
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context->Trap = TRAP_sig(sigcontext);
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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 C(x) GPR_sig(x,sigcontext) = context->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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#undef C
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IAR_sig(sigcontext) = context->Iar; /* Program Counter */
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MSR_sig(sigcontext) = context->Msr; /* Machine State Register (Supervisor) */
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CTR_sig(sigcontext) = context->Ctr;
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XER_sig(sigcontext) = context->Xer;
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LR_sig(sigcontext) = context->Lr;
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CR_sig(sigcontext) = context->Cr;
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/* Setting Exception regs */
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DAR_sig(sigcontext) = context->Dar;
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DSISR_sig(sigcontext) = context->Dsisr;
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TRAP_sig(sigcontext) = context->Trap;
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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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#define C(x) context->Fpr##x = FLOAT_sig(x,sigcontext)
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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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#undef C
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context->Fpscr = FPSCR_sig(sigcontext);
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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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#define C(x) FLOAT_sig(x,sigcontext) = context->Fpr##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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#undef C
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FPSCR_sig(sigcontext) = context->Fpscr;
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}
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/***********************************************************************
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* get_cpu_context
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*
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* Get the context of the current thread.
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*/
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void get_cpu_context( CONTEXT *context )
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{
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FIXME("not implemented\n");
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}
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/***********************************************************************
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* set_cpu_context
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*
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* Set the new CPU context.
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*/
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void set_cpu_context( const CONTEXT *context )
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{
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FIXME("not implemented\n");
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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 = context->Fpscr;
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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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* do_segv
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*
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* Implementation of SIGSEGV handler.
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*/
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static void do_segv( CONTEXT *context, int trap, int err, int code, void * addr )
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{
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EXCEPTION_RECORD rec;
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DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
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rec.ExceptionRecord = NULL;
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rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
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rec.ExceptionAddress = addr;
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rec.NumberParameters = 0;
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switch (trap) {
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case SIGSEGV:
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switch ( 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] = (ULONG_PTR)addr;
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if (!(page_fault_code=VIRTUAL_HandleFault(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",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 ( 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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#ifdef BUS_ADRERR
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case BUS_ADRERR:
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#endif
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#ifdef BUS_OBJERR
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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] = (ULONG_PTR)addr;
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if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
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return;
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rec.ExceptionCode = page_fault_code;
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break;
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#endif
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default:FIXME("Unhandled SIGBUS/%x\n",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 ( code & 0xffff ) {
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case ILL_ILLOPC: /* illegal opcode */
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#ifdef ILL_ILLOPN
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case ILL_ILLOPN: /* illegal operand */
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#endif
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#ifdef ILL_ILLADR
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case ILL_ILLADR: /* illegal addressing mode */
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#endif
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#ifdef ILL_ILLTRP
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case ILL_ILLTRP: /* illegal trap */
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#endif
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#ifdef ILL_COPROC
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case ILL_COPROC: /* coprocessor error */
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#endif
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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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#ifdef ILL_PRVREG
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case ILL_PRVREG: /* privileged register */
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#endif
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rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
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break;
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#ifdef ILL_BADSTK
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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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#endif
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default:FIXME("Unhandled SIGILL/%x\n", code);
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break;
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}
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break;
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}
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__regs_RtlRaiseException( &rec, context );
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}
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/**********************************************************************
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* do_trap
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*
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* Implementation of SIGTRAP handler.
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*/
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static void do_trap( CONTEXT *context, int code, void * addr )
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{
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EXCEPTION_RECORD rec;
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rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
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rec.ExceptionRecord = NULL;
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rec.ExceptionAddress = addr;
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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 (code & 0xffff) {
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#ifdef TRAP_BRKPT
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case TRAP_BRKPT:
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rec.ExceptionCode = EXCEPTION_BREAKPOINT;
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break;
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#endif
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#ifdef TRAP_TRACE
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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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#endif
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default:FIXME("Unhandled SIGTRAP/%x\n", code);
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break;
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}
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__regs_RtlRaiseException( &rec, context );
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}
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/**********************************************************************
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* do_trap
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*
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* Implementation of SIGFPE handler.
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*/
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static void do_fpe( CONTEXT *context, int code, void * addr )
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{
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EXCEPTION_RECORD rec;
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switch ( code & 0xffff ) {
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#ifdef FPE_FLTSUB
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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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#endif
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#ifdef FPE_INTDIV
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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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#endif
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#ifdef FPE_INTOVF
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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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#endif
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#ifdef FPE_FLTDIV
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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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#endif
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#ifdef FPE_FLTOVF
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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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#endif
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#ifdef FPE_FLTUND
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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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#endif
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#ifdef FPE_FLTRES
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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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#endif
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#ifdef FPE_FLTINV
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case FPE_FLTINV:
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#endif
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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 = addr;
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rec.NumberParameters = 0;
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__regs_RtlRaiseException( &rec, context );
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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)
|
|
{
|
|
CONTEXT context;
|
|
save_context( &context, HANDLER_CONTEXT );
|
|
do_segv( &context, __siginfo->si_signo, __siginfo->si_errno, __siginfo->si_code, __siginfo->si_addr );
|
|
restore_context( &context, HANDLER_CONTEXT );
|
|
}
|
|
|
|
/**********************************************************************
|
|
* trap_handler
|
|
*
|
|
* Handler for SIGTRAP.
|
|
*/
|
|
static HANDLER_DEF(trap_handler)
|
|
{
|
|
CONTEXT context;
|
|
save_context( &context, HANDLER_CONTEXT );
|
|
do_trap( &context, __siginfo->si_code, __siginfo->si_addr );
|
|
restore_context( &context, HANDLER_CONTEXT );
|
|
}
|
|
|
|
/**********************************************************************
|
|
* fpe_handler
|
|
*
|
|
* Handler for SIGFPE.
|
|
*/
|
|
static HANDLER_DEF(fpe_handler)
|
|
{
|
|
CONTEXT context;
|
|
save_fpu( &context, HANDLER_CONTEXT );
|
|
save_context( &context, HANDLER_CONTEXT );
|
|
do_fpe( &context, __siginfo->si_code, __siginfo->si_addr );
|
|
restore_context( &context, HANDLER_CONTEXT );
|
|
restore_fpu( &context, HANDLER_CONTEXT );
|
|
}
|
|
|
|
/**********************************************************************
|
|
* int_handler
|
|
*
|
|
* Handler for SIGINT.
|
|
*/
|
|
static HANDLER_DEF(int_handler)
|
|
{
|
|
if (!dispatch_signal(SIGINT))
|
|
{
|
|
EXCEPTION_RECORD rec;
|
|
CONTEXT context;
|
|
|
|
save_context( &context, HANDLER_CONTEXT );
|
|
rec.ExceptionCode = CONTROL_C_EXIT;
|
|
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
|
|
rec.ExceptionRecord = NULL;
|
|
rec.ExceptionAddress = (LPVOID)context.Iar;
|
|
rec.NumberParameters = 0;
|
|
__regs_RtlRaiseException( &rec, &context );
|
|
restore_context( &context, HANDLER_CONTEXT );
|
|
}
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* abrt_handler
|
|
*
|
|
* Handler for SIGABRT.
|
|
*/
|
|
static HANDLER_DEF(abrt_handler)
|
|
{
|
|
EXCEPTION_RECORD rec;
|
|
CONTEXT context;
|
|
|
|
save_context( &context, HANDLER_CONTEXT );
|
|
rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
|
|
rec.ExceptionFlags = EH_NONCONTINUABLE;
|
|
rec.ExceptionRecord = NULL;
|
|
rec.ExceptionAddress = (LPVOID)context.Iar;
|
|
rec.NumberParameters = 0;
|
|
__regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
|
|
restore_context( &context, HANDLER_CONTEXT );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* term_handler
|
|
*
|
|
* Handler for SIGTERM.
|
|
*/
|
|
static HANDLER_DEF(term_handler)
|
|
{
|
|
server_abort_thread(0);
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* usr1_handler
|
|
*
|
|
* Handler for SIGUSR1, used to signal a thread that it got suspended.
|
|
*/
|
|
static HANDLER_DEF(usr1_handler)
|
|
{
|
|
CONTEXT context;
|
|
|
|
save_context( &context, HANDLER_CONTEXT );
|
|
wait_suspend( &context );
|
|
restore_context( &context, HANDLER_CONTEXT );
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* get_signal_stack_total_size
|
|
*
|
|
* Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
|
|
* Must be a power of two.
|
|
*/
|
|
size_t get_signal_stack_total_size(void)
|
|
{
|
|
assert( sizeof(TEB) <= getpagesize() );
|
|
return getpagesize(); /* this is just for the TEB, we don't need a signal stack */
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* set_handler
|
|
*
|
|
* Set a signal handler
|
|
*/
|
|
static int set_handler( int sig, void (*func)() )
|
|
{
|
|
struct sigaction sig_act;
|
|
|
|
sig_act.sa_sigaction = func;
|
|
sig_act.sa_mask = server_block_set;
|
|
sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
|
|
return sigaction( sig, &sig_act, NULL );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* __wine_set_signal_handler (NTDLL.@)
|
|
*/
|
|
int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
|
|
{
|
|
if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
|
|
if (handlers[sig] != NULL) return -2;
|
|
handlers[sig] = wsh;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* SIGNAL_Init
|
|
*/
|
|
BOOL SIGNAL_Init(void)
|
|
{
|
|
if (set_handler( SIGINT, (void (*)())int_handler ) == -1) goto error;
|
|
if (set_handler( SIGFPE, (void (*)())fpe_handler ) == -1) goto error;
|
|
if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
|
|
if (set_handler( SIGILL, (void (*)())segv_handler ) == -1) goto error;
|
|
if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
|
|
if (set_handler( SIGTERM, (void (*)())term_handler ) == -1) goto error;
|
|
if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
|
|
#ifdef SIGBUS
|
|
if (set_handler( SIGBUS, (void (*)())segv_handler ) == -1) goto error;
|
|
#endif
|
|
#ifdef SIGTRAP
|
|
if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
|
|
#endif
|
|
|
|
return TRUE;
|
|
|
|
error:
|
|
perror("sigaction");
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* __wine_enter_vm86 (NTDLL.@)
|
|
*/
|
|
void __wine_enter_vm86( CONTEXT *context )
|
|
{
|
|
MESSAGE("vm86 mode not supported on this platform\n");
|
|
}
|
|
|
|
/**********************************************************************
|
|
* DbgBreakPoint (NTDLL.@)
|
|
*/
|
|
void WINAPI DbgBreakPoint(void)
|
|
{
|
|
kill(getpid(), SIGTRAP);
|
|
}
|
|
|
|
/**********************************************************************
|
|
* DbgUserBreakPoint (NTDLL.@)
|
|
*/
|
|
void WINAPI DbgUserBreakPoint(void)
|
|
{
|
|
kill(getpid(), SIGTRAP);
|
|
}
|
|
|
|
#endif /* __powerpc__ */
|