Preliminary implementation of signal handling for x86-64.
This commit is contained in:
Alexandre Julliard
parent
08de86c831
commit
ebf7a5d408
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@ -40,6 +40,7 @@ C_SRCS = \
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signal_i386.c \
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signal_powerpc.c \
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signal_sparc.c \
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signal_x86_64.c \
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string.c \
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sync.c \
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version.c \
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@ -0,0 +1,507 @@
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/*
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* x86-64 signal handling routines
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*
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* Copyright 1999, 2005 Alexandre Julliard
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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 __x86_64__
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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_SYS_SIGNAL_H
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# include <sys/signal.h>
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#endif
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#define NONAMELESSUNION
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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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#define RAX_sig(context) ((context)->uc_mcontext.gregs[REG_RAX])
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#define RBX_sig(context) ((context)->uc_mcontext.gregs[REG_RBX])
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#define RCX_sig(context) ((context)->uc_mcontext.gregs[REG_RCX])
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#define RDX_sig(context) ((context)->uc_mcontext.gregs[REG_RDX])
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#define RSI_sig(context) ((context)->uc_mcontext.gregs[REG_RSI])
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#define RDI_sig(context) ((context)->uc_mcontext.gregs[REG_RDI])
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#define RBP_sig(context) ((context)->uc_mcontext.gregs[REG_RBP])
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#define R8_sig(context) ((context)->uc_mcontext.gregs[REG_R8])
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#define R9_sig(context) ((context)->uc_mcontext.gregs[REG_R9])
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#define R10_sig(context) ((context)->uc_mcontext.gregs[REG_R10])
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#define R11_sig(context) ((context)->uc_mcontext.gregs[REG_R11])
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#define R12_sig(context) ((context)->uc_mcontext.gregs[REG_R12])
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#define R13_sig(context) ((context)->uc_mcontext.gregs[REG_R13])
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#define R14_sig(context) ((context)->uc_mcontext.gregs[REG_R14])
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#define R15_sig(context) ((context)->uc_mcontext.gregs[REG_R15])
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#define CS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 0))
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#define GS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 1))
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#define FS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 2))
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#define RSP_sig(context) ((context)->uc_mcontext.gregs[REG_RSP])
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#define RIP_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
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#define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
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#define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
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#define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
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#define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.fpregs))
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#define FAULT_CODE (__siginfo->si_code)
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#define FAULT_ADDRESS (__siginfo->si_addr)
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#endif /* linux */
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#define T_UNKNOWN (-1) /* Unknown fault (TRAP_sig not defined) */
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#define T_DIVIDE 0 /* Division by zero exception */
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#define T_TRCTRAP 1 /* Single-step exception */
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#define T_NMI 2 /* NMI interrupt */
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#define T_BPTFLT 3 /* Breakpoint exception */
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#define T_OFLOW 4 /* Overflow exception */
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#define T_BOUND 5 /* Bound range exception */
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#define T_PRIVINFLT 6 /* Invalid opcode exception */
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#define T_DNA 7 /* Device not available exception */
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#define T_DOUBLEFLT 8 /* Double fault exception */
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#define T_FPOPFLT 9 /* Coprocessor segment overrun */
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#define T_TSSFLT 10 /* Invalid TSS exception */
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#define T_SEGNPFLT 11 /* Segment not present exception */
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#define T_STKFLT 12 /* Stack fault */
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#define T_PROTFLT 13 /* General protection fault */
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#define T_PAGEFLT 14 /* Page fault */
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#define T_RESERVED 15 /* Unknown exception */
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#define T_ARITHTRAP 16 /* Floating point exception */
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#define T_ALIGNFLT 17 /* Alignment check exception */
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#define T_MCHK 18 /* Machine check exception */
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#define T_CACHEFLT 19 /* Cache flush exception */
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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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context->Rax = RAX_sig(sigcontext);
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context->Rcx = RCX_sig(sigcontext);
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context->Rdx = RDX_sig(sigcontext);
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context->Rbx = RBX_sig(sigcontext);
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context->Rsp = RSP_sig(sigcontext);
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context->Rbp = RBP_sig(sigcontext);
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context->Rsi = RSI_sig(sigcontext);
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context->Rdi = RDI_sig(sigcontext);
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context->R8 = R8_sig(sigcontext);
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context->R9 = R9_sig(sigcontext);
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context->R10 = R10_sig(sigcontext);
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context->R11 = R11_sig(sigcontext);
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context->R12 = R12_sig(sigcontext);
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context->R13 = R13_sig(sigcontext);
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context->R14 = R14_sig(sigcontext);
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context->R15 = R15_sig(sigcontext);
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context->Rip = RIP_sig(sigcontext);
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context->SegCs = CS_sig(sigcontext);
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context->SegFs = FS_sig(sigcontext);
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context->SegGs = GS_sig(sigcontext);
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context->EFlags = EFL_sig(sigcontext);
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context->SegDs = 0; /* FIXME */
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context->SegEs = 0; /* FIXME */
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context->SegSs = 0; /* FIXME */
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context->MxCsr = 0; /* FIXME */
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if (FPU_sig(sigcontext)) context->u.FltSave = *FPU_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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RAX_sig(sigcontext) = context->Rax;
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RCX_sig(sigcontext) = context->Rcx;
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RDX_sig(sigcontext) = context->Rdx;
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RBX_sig(sigcontext) = context->Rbx;
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RSP_sig(sigcontext) = context->Rsp;
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RBP_sig(sigcontext) = context->Rbp;
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RSI_sig(sigcontext) = context->Rsi;
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RDI_sig(sigcontext) = context->Rdi;
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R8_sig(sigcontext) = context->R8;
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R9_sig(sigcontext) = context->R9;
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R10_sig(sigcontext) = context->R10;
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R11_sig(sigcontext) = context->R11;
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R12_sig(sigcontext) = context->R12;
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R13_sig(sigcontext) = context->R13;
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R14_sig(sigcontext) = context->R14;
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R15_sig(sigcontext) = context->R15;
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RIP_sig(sigcontext) = context->Rip;
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CS_sig(sigcontext) = context->SegCs;
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FS_sig(sigcontext) = context->SegFs;
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GS_sig(sigcontext) = context->SegGs;
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EFL_sig(sigcontext) = context->EFlags;
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if (FPU_sig(sigcontext)) *FPU_sig(sigcontext) = context->u.FltSave;
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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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EXCEPTION_RECORD rec;
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CONTEXT context;
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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)context.Rip;
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rec.NumberParameters = 0;
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switch(TRAP_sig(HANDLER_CONTEXT))
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{
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case T_OFLOW: /* Overflow exception */
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rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
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break;
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case T_BOUND: /* Bound range exception */
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rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
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break;
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case T_PRIVINFLT: /* Invalid opcode exception */
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rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
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break;
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case T_STKFLT: /* Stack fault */
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rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
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break;
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case T_SEGNPFLT: /* Segment not present exception */
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case T_PROTFLT: /* General protection fault */
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case T_UNKNOWN: /* Unknown fault code */
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rec.ExceptionCode = ERROR_sig(HANDLER_CONTEXT) ? EXCEPTION_ACCESS_VIOLATION
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: EXCEPTION_PRIV_INSTRUCTION;
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break;
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case T_PAGEFLT: /* Page fault */
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rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
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#ifdef FAULT_ADDRESS
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rec.NumberParameters = 2;
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rec.ExceptionInformation[0] = (ERROR_sig(HANDLER_CONTEXT) & 2) != 0;
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rec.ExceptionInformation[1] = (ULONG_PTR)FAULT_ADDRESS;
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#endif
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break;
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case T_ALIGNFLT: /* Alignment check exception */
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rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
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break;
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default:
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ERR( "Got unexpected trap %ld\n", TRAP_sig(HANDLER_CONTEXT) );
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/* fall through */
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case T_NMI: /* NMI interrupt */
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case T_DNA: /* Device not available exception */
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case T_DOUBLEFLT: /* Double fault exception */
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case T_TSSFLT: /* Invalid TSS exception */
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case T_RESERVED: /* Unknown exception */
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case T_MCHK: /* Machine check exception */
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case T_CACHEFLT: /* Cache flush exception */
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rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
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break;
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}
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__regs_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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EXCEPTION_RECORD rec;
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CONTEXT context;
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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.Rip;
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rec.NumberParameters = 0;
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switch(FAULT_CODE)
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{
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case TRAP_TRACE: /* Single-step exception */
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rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
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EFL_sig(HANDLER_CONTEXT) &= ~0x100; /* clear single-step flag */
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break;
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case TRAP_BRKPT: /* Breakpoint exception */
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rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */
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/* fall through */
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default:
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rec.ExceptionCode = EXCEPTION_BREAKPOINT;
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break;
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}
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__regs_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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EXCEPTION_RECORD rec;
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CONTEXT context;
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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.Rip;
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rec.NumberParameters = 0;
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switch (FAULT_CODE)
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{
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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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__regs_RtlRaiseException( &rec, &context );
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restore_context( &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.Rip;
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rec.NumberParameters = 0;
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__regs_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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* abrt_handler
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*
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* Handler for SIGABRT.
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*/
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static HANDLER_DEF(abrt_handler)
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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 = EXCEPTION_WINE_ASSERTION;
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rec.ExceptionFlags = EH_NONCONTINUABLE;
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rec.ExceptionRecord = NULL;
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rec.ExceptionAddress = (LPVOID)context.Rip;
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rec.NumberParameters = 0;
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__regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
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restore_context( &context, HANDLER_CONTEXT );
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}
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/**********************************************************************
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* term_handler
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*
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* Handler for SIGTERM.
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*/
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static HANDLER_DEF(term_handler)
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{
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server_abort_thread(0);
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}
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/**********************************************************************
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* usr1_handler
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*
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* Handler for SIGUSR1, used to signal a thread that it got suspended.
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*/
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static HANDLER_DEF(usr1_handler)
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{
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LARGE_INTEGER timeout;
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/* wait with 0 timeout, will only return once the thread is no longer suspended */
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timeout.QuadPart = 0;
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NTDLL_wait_for_multiple_objects( 0, NULL, 0, &timeout, 0 );
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}
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/**********************************************************************
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* get_signal_stack_total_size
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*
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* Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
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* Must be a power of two.
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*/
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size_t get_signal_stack_total_size(void)
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{
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assert( sizeof(TEB) <= 2*getpagesize() );
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return 2*getpagesize(); /* this is just for the TEB, we don't need a signal stack */
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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, 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, SIGUSR2 );
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|
||||
sig_act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
|
||||
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.@)
|
||||
*/
|
||||
__ASM_GLOBAL_FUNC( DbgBreakPoint, "int $3; ret");
|
||||
|
||||
/**********************************************************************
|
||||
* DbgUserBreakPoint (NTDLL.@)
|
||||
*/
|
||||
__ASM_GLOBAL_FUNC( DbgUserBreakPoint, "int $3; ret");
|
||||
|
||||
#endif /* __x86_64__ */
|
||||
Loading…
Reference in New Issue