/* * i386 signal handling routines * * Copyright 1999 Alexandre Julliard * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA */ #ifdef __i386__ #include "config.h" #include "wine/port.h" #include <errno.h> #include <signal.h> #include <stdlib.h> #include <stdarg.h> #include <stdio.h> #include <sys/types.h> #ifdef HAVE_UNISTD_H # include <unistd.h> #endif #ifdef HAVE_SYS_PARAM_H # include <sys/param.h> #endif #ifdef HAVE_SYSCALL_H # include <syscall.h> #else # ifdef HAVE_SYS_SYSCALL_H # include <sys/syscall.h> # endif #endif #ifdef HAVE_SYS_VM86_H # include <sys/vm86.h> #endif #ifdef HAVE_SYS_SIGNAL_H # include <sys/signal.h> #endif #ifdef HAVE_SYS_SYSCTL_H # include <sys/sysctl.h> #endif #include "ntstatus.h" #define WIN32_NO_STATUS #include "windef.h" #include "wine/library.h" #include "ntdll_misc.h" #include "wine/exception.h" #include "wine/debug.h" #ifdef HAVE_VALGRIND_MEMCHECK_H #include <valgrind/memcheck.h> #endif #undef ERR /* Solaris needs to define this */ /* not defined for x86, so copy the x86_64 definition */ typedef struct DECLSPEC_ALIGN(16) _M128A { ULONGLONG Low; LONGLONG High; } M128A; typedef struct { WORD ControlWord; WORD StatusWord; BYTE TagWord; BYTE Reserved1; WORD ErrorOpcode; DWORD ErrorOffset; WORD ErrorSelector; WORD Reserved2; DWORD DataOffset; WORD DataSelector; WORD Reserved3; DWORD MxCsr; DWORD MxCsr_Mask; M128A FloatRegisters[8]; M128A XmmRegisters[16]; BYTE Reserved4[96]; } XMM_SAVE_AREA32; /*********************************************************************** * signal context platform-specific definitions */ #if defined (__linux__) typedef ucontext_t SIGCONTEXT; #define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX]) #define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX]) #define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX]) #define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX]) #define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI]) #define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI]) #define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP]) #define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP]) #define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS]) #define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS]) #define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES]) #define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS]) #define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS]) #define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS]) #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL]) #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP]) #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO]) #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR]) #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->uc_mcontext.fpregs)) #define FPUX_sig(context) (FPU_sig(context) && !((context)->uc_mcontext.fpregs->status >> 16) ? (XMM_SAVE_AREA32 *)(FPU_sig(context) + 1) : NULL) #define VM86_EAX 0 /* the %eax value while vm86_enter is executing */ #define VIF_FLAG 0x00080000 #define VIP_FLAG 0x00100000 int vm86_enter( void **vm86_ptr ); void vm86_return(void); void vm86_return_end(void); __ASM_GLOBAL_FUNC(vm86_enter, "pushl %ebp\n\t" __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t") __ASM_CFI(".cfi_rel_offset %ebp,0\n\t") "movl %esp,%ebp\n\t" __ASM_CFI(".cfi_def_cfa_register %ebp\n\t") "pushl %ebx\n\t" __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t") "movl $166,%eax\n\t" /*SYS_vm86*/ "movl 8(%ebp),%ecx\n\t" /* vm86_ptr */ "movl (%ecx),%ecx\n\t" "movl $1,%ebx\n\t" /*VM86_ENTER*/ "pushl %ecx\n\t" /* put vm86plus_struct ptr somewhere we can find it */ "pushl %fs\n\t" "pushl %gs\n\t" "int $0x80\n" ".globl " __ASM_NAME("vm86_return") "\n\t" __ASM_FUNC("vm86_return") "\n" __ASM_NAME("vm86_return") ":\n\t" "popl %gs\n\t" "popl %fs\n\t" "popl %ecx\n\t" "popl %ebx\n\t" __ASM_CFI(".cfi_same_value %ebx\n\t") "popl %ebp\n\t" __ASM_CFI(".cfi_def_cfa %esp,4\n\t") __ASM_CFI(".cfi_same_value %ebp\n\t") "testl %eax,%eax\n\t" "jl 0f\n\t" "cmpb $0,%al\n\t" /* VM86_SIGNAL */ "je " __ASM_NAME("vm86_enter") "\n\t" "0:\n\t" "movl 4(%esp),%ecx\n\t" /* vm86_ptr */ "movl $0,(%ecx)\n\t" ".globl " __ASM_NAME("vm86_return_end") "\n\t" __ASM_FUNC("vm86_return_end") "\n" __ASM_NAME("vm86_return_end") ":\n\t" "ret" ) #ifdef HAVE_SYS_VM86_H # define __HAVE_VM86 #endif #elif defined (__BSDI__) #include <machine/frame.h> typedef struct trapframe SIGCONTEXT; #define EAX_sig(context) ((context)->tf_eax) #define EBX_sig(context) ((context)->tf_ebx) #define ECX_sig(context) ((context)->tf_ecx) #define EDX_sig(context) ((context)->tf_edx) #define ESI_sig(context) ((context)->tf_esi) #define EDI_sig(context) ((context)->tf_edi) #define EBP_sig(context) ((context)->tf_ebp) #define CS_sig(context) ((context)->tf_cs) #define DS_sig(context) ((context)->tf_ds) #define ES_sig(context) ((context)->tf_es) #define SS_sig(context) ((context)->tf_ss) #define EFL_sig(context) ((context)->tf_eflags) #define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip)) #define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp)) #define FPU_sig(context) NULL /* FIXME */ #define FPUX_sig(context) NULL /* FIXME */ #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__) #include <machine/trap.h> typedef struct sigcontext SIGCONTEXT; #define EAX_sig(context) ((context)->sc_eax) #define EBX_sig(context) ((context)->sc_ebx) #define ECX_sig(context) ((context)->sc_ecx) #define EDX_sig(context) ((context)->sc_edx) #define ESI_sig(context) ((context)->sc_esi) #define EDI_sig(context) ((context)->sc_edi) #define EBP_sig(context) ((context)->sc_ebp) #define CS_sig(context) ((context)->sc_cs) #define DS_sig(context) ((context)->sc_ds) #define ES_sig(context) ((context)->sc_es) #define FS_sig(context) ((context)->sc_fs) #define GS_sig(context) ((context)->sc_gs) #define SS_sig(context) ((context)->sc_ss) #define TRAP_sig(context) ((context)->sc_trapno) #define ERROR_sig(context) ((context)->sc_err) #define EFL_sig(context) ((context)->sc_eflags) #define EIP_sig(context) ((context)->sc_eip) #define ESP_sig(context) ((context)->sc_esp) #define FPU_sig(context) NULL /* FIXME */ #define FPUX_sig(context) NULL /* FIXME */ #elif defined (__OpenBSD__) typedef struct sigcontext SIGCONTEXT; #define EAX_sig(context) ((context)->sc_eax) #define EBX_sig(context) ((context)->sc_ebx) #define ECX_sig(context) ((context)->sc_ecx) #define EDX_sig(context) ((context)->sc_edx) #define ESI_sig(context) ((context)->sc_esi) #define EDI_sig(context) ((context)->sc_edi) #define EBP_sig(context) ((context)->sc_ebp) #define CS_sig(context) ((context)->sc_cs) #define DS_sig(context) ((context)->sc_ds) #define ES_sig(context) ((context)->sc_es) #define FS_sig(context) ((context)->sc_fs) #define GS_sig(context) ((context)->sc_gs) #define SS_sig(context) ((context)->sc_ss) #define TRAP_sig(context) ((context)->sc_trapno) #define ERROR_sig(context) ((context)->sc_err) #define EFL_sig(context) ((context)->sc_eflags) #define EIP_sig(context) ((context)->sc_eip) #define ESP_sig(context) ((context)->sc_esp) #define FPU_sig(context) NULL /* FIXME */ #define FPUX_sig(context) NULL /* FIXME */ #define T_MCHK T_MACHK #define T_XMMFLT T_XFTRAP #elif defined(__svr4__) || defined(_SCO_DS) || defined(__sun) #ifdef _SCO_DS #include <sys/regset.h> #endif #include <sys/ucontext.h> typedef struct ucontext SIGCONTEXT; #ifdef _SCO_DS #define gregs regs #endif #define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX]) #define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX]) #define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX]) #define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX]) #define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI]) #define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI]) #define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP]) #define CS_sig(context) ((context)->uc_mcontext.gregs[CS]) #define DS_sig(context) ((context)->uc_mcontext.gregs[DS]) #define ES_sig(context) ((context)->uc_mcontext.gregs[ES]) #define SS_sig(context) ((context)->uc_mcontext.gregs[SS]) #define FS_sig(context) ((context)->uc_mcontext.gregs[FS]) #define GS_sig(context) ((context)->uc_mcontext.gregs[GS]) #define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL]) #define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP]) #ifdef UESP #define ESP_sig(context) ((context)->uc_mcontext.gregs[UESP]) #elif defined(R_ESP) #define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP]) #else #define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP]) #endif #ifdef ERR #define ERROR_sig(context) ((context)->uc_mcontext.gregs[ERR]) #endif #ifdef TRAPNO #define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO]) #endif #define FPU_sig(context) NULL /* FIXME */ #define FPUX_sig(context) NULL /* FIXME */ #elif defined (__APPLE__) # include <sys/ucontext.h> typedef ucontext_t SIGCONTEXT; /* work around silly renaming of struct members in OS X 10.5 */ #if __DARWIN_UNIX03 && defined(_STRUCT_X86_EXCEPTION_STATE32) #define EAX_sig(context) ((context)->uc_mcontext->__ss.__eax) #define EBX_sig(context) ((context)->uc_mcontext->__ss.__ebx) #define ECX_sig(context) ((context)->uc_mcontext->__ss.__ecx) #define EDX_sig(context) ((context)->uc_mcontext->__ss.__edx) #define ESI_sig(context) ((context)->uc_mcontext->__ss.__esi) #define EDI_sig(context) ((context)->uc_mcontext->__ss.__edi) #define EBP_sig(context) ((context)->uc_mcontext->__ss.__ebp) #define CS_sig(context) ((context)->uc_mcontext->__ss.__cs) #define DS_sig(context) ((context)->uc_mcontext->__ss.__ds) #define ES_sig(context) ((context)->uc_mcontext->__ss.__es) #define FS_sig(context) ((context)->uc_mcontext->__ss.__fs) #define GS_sig(context) ((context)->uc_mcontext->__ss.__gs) #define SS_sig(context) ((context)->uc_mcontext->__ss.__ss) #define EFL_sig(context) ((context)->uc_mcontext->__ss.__eflags) #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__eip)) #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__esp)) #define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno) #define ERROR_sig(context) ((context)->uc_mcontext->__es.__err) #define FPU_sig(context) NULL #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->__fs.__fpu_fcw) #else #define EAX_sig(context) ((context)->uc_mcontext->ss.eax) #define EBX_sig(context) ((context)->uc_mcontext->ss.ebx) #define ECX_sig(context) ((context)->uc_mcontext->ss.ecx) #define EDX_sig(context) ((context)->uc_mcontext->ss.edx) #define ESI_sig(context) ((context)->uc_mcontext->ss.esi) #define EDI_sig(context) ((context)->uc_mcontext->ss.edi) #define EBP_sig(context) ((context)->uc_mcontext->ss.ebp) #define CS_sig(context) ((context)->uc_mcontext->ss.cs) #define DS_sig(context) ((context)->uc_mcontext->ss.ds) #define ES_sig(context) ((context)->uc_mcontext->ss.es) #define FS_sig(context) ((context)->uc_mcontext->ss.fs) #define GS_sig(context) ((context)->uc_mcontext->ss.gs) #define SS_sig(context) ((context)->uc_mcontext->ss.ss) #define EFL_sig(context) ((context)->uc_mcontext->ss.eflags) #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip)) #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.esp)) #define TRAP_sig(context) ((context)->uc_mcontext->es.trapno) #define ERROR_sig(context) ((context)->uc_mcontext->es.err) #define FPU_sig(context) NULL #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->fs.fpu_fcw) #endif #elif defined(__NetBSD__) # include <sys/ucontext.h> # include <sys/types.h> # include <signal.h> typedef ucontext_t SIGCONTEXT; #define EAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EAX]) #define EBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBX]) #define ECX_sig(context) ((context)->uc_mcontext.__gregs[_REG_ECX]) #define EDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDX]) #define ESI_sig(context) ((context)->uc_mcontext.__gregs[_REG_ESI]) #define EDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDI]) #define EBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBP]) #define ESP_sig(context) _UC_MACHINE_SP(context) #define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS]) #define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS]) #define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES]) #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS]) #define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS]) #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS]) #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_EFL]) #define EIP_sig(context) _UC_MACHINE_PC(context) #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO]) #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR]) #define FPU_sig(context) NULL #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&((context)->uc_mcontext.__fpregs)) #define T_MCHK T_MCA #define T_XMMFLT T_XMM #else #error You must define the signal context functions for your platform #endif /* linux */ WINE_DEFAULT_DEBUG_CHANNEL(seh); typedef int (*wine_signal_handler)(unsigned int sig); static const size_t teb_size = 4096; /* we reserve one page for the TEB */ static size_t signal_stack_mask; static size_t signal_stack_size; static wine_signal_handler handlers[256]; static int fpux_support; /* whether the CPU support extended fpu context */ extern void DECLSPEC_NORETURN __wine_restore_regs( const CONTEXT *context ); enum i386_trap_code { TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */ #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) TRAP_x86_DIVIDE = T_DIVIDE, /* Division by zero exception */ TRAP_x86_TRCTRAP = T_TRCTRAP, /* Single-step exception */ TRAP_x86_NMI = T_NMI, /* NMI interrupt */ TRAP_x86_BPTFLT = T_BPTFLT, /* Breakpoint exception */ TRAP_x86_OFLOW = T_OFLOW, /* Overflow exception */ TRAP_x86_BOUND = T_BOUND, /* Bound range exception */ TRAP_x86_PRIVINFLT = T_PRIVINFLT, /* Invalid opcode exception */ TRAP_x86_DNA = T_DNA, /* Device not available exception */ TRAP_x86_DOUBLEFLT = T_DOUBLEFLT, /* Double fault exception */ TRAP_x86_FPOPFLT = T_FPOPFLT, /* Coprocessor segment overrun */ TRAP_x86_TSSFLT = T_TSSFLT, /* Invalid TSS exception */ TRAP_x86_SEGNPFLT = T_SEGNPFLT, /* Segment not present exception */ TRAP_x86_STKFLT = T_STKFLT, /* Stack fault */ TRAP_x86_PROTFLT = T_PROTFLT, /* General protection fault */ TRAP_x86_PAGEFLT = T_PAGEFLT, /* Page fault */ TRAP_x86_ARITHTRAP = T_ARITHTRAP, /* Floating point exception */ TRAP_x86_ALIGNFLT = T_ALIGNFLT, /* Alignment check exception */ TRAP_x86_MCHK = T_MCHK, /* Machine check exception */ TRAP_x86_CACHEFLT = T_XMMFLT /* Cache flush exception */ #else TRAP_x86_DIVIDE = 0, /* Division by zero exception */ TRAP_x86_TRCTRAP = 1, /* Single-step exception */ TRAP_x86_NMI = 2, /* NMI interrupt */ TRAP_x86_BPTFLT = 3, /* Breakpoint exception */ TRAP_x86_OFLOW = 4, /* Overflow exception */ TRAP_x86_BOUND = 5, /* Bound range exception */ TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */ TRAP_x86_DNA = 7, /* Device not available exception */ TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */ TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */ TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */ TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */ TRAP_x86_STKFLT = 12, /* Stack fault */ TRAP_x86_PROTFLT = 13, /* General protection fault */ TRAP_x86_PAGEFLT = 14, /* Page fault */ TRAP_x86_ARITHTRAP = 16, /* Floating point exception */ TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */ TRAP_x86_MCHK = 18, /* Machine check exception */ TRAP_x86_CACHEFLT = 19 /* SIMD exception (via SIGFPE) if CPU is SSE capable otherwise Cache flush exception (via SIGSEV) */ #endif }; /* Exception record for handling exceptions happening inside exception handlers */ typedef struct { EXCEPTION_REGISTRATION_RECORD frame; EXCEPTION_REGISTRATION_RECORD *prevFrame; } EXC_NESTED_FRAME; extern DWORD EXC_CallHandler( EXCEPTION_RECORD *record, EXCEPTION_REGISTRATION_RECORD *frame, CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher, PEXCEPTION_HANDLER handler, PEXCEPTION_HANDLER nested_handler ); /*********************************************************************** * dispatch_signal */ static inline int dispatch_signal(unsigned int sig) { if (handlers[sig] == NULL) return 0; return handlers[sig](sig); } /*********************************************************************** * get_trap_code * * Get the trap code for a signal. */ static inline enum i386_trap_code get_trap_code( const SIGCONTEXT *sigcontext ) { #ifdef TRAP_sig return TRAP_sig(sigcontext); #else return TRAP_x86_UNKNOWN; /* unknown trap code */ #endif } /*********************************************************************** * get_error_code * * Get the error code for a signal. */ static inline WORD get_error_code( const SIGCONTEXT *sigcontext ) { #ifdef ERROR_sig return ERROR_sig(sigcontext); #else return 0; #endif } /*********************************************************************** * get_signal_stack * * Get the base of the signal stack for the current thread. */ static inline void *get_signal_stack(void) { return (char *)NtCurrentTeb() + 4096; } /*********************************************************************** * get_current_teb * * Get the current teb based on the stack pointer. */ static inline TEB *get_current_teb(void) { unsigned long esp; __asm__("movl %%esp,%0" : "=g" (esp) ); return (TEB *)(esp & ~signal_stack_mask); } /******************************************************************* * is_valid_frame */ static inline BOOL is_valid_frame( void *frame ) { if ((ULONG_PTR)frame & 3) return FALSE; return (frame >= NtCurrentTeb()->Tib.StackLimit && (void **)frame < (void **)NtCurrentTeb()->Tib.StackBase - 1); } /******************************************************************* * raise_handler * * Handler for exceptions happening inside a handler. */ static DWORD raise_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame, CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher ) { if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) return ExceptionContinueSearch; /* We shouldn't get here so we store faulty frame in dispatcher */ *dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame; return ExceptionNestedException; } /******************************************************************* * unwind_handler * * Handler for exceptions happening inside an unwind handler. */ static DWORD unwind_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame, CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher ) { if (!(rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))) return ExceptionContinueSearch; /* We shouldn't get here so we store faulty frame in dispatcher */ *dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame; return ExceptionCollidedUnwind; } /********************************************************************** * call_stack_handlers * * Call the stack handlers chain. */ static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *context ) { EXCEPTION_REGISTRATION_RECORD *frame, *dispatch, *nested_frame; DWORD res; frame = NtCurrentTeb()->Tib.ExceptionList; nested_frame = NULL; while (frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL) { /* Check frame address */ if (!is_valid_frame( frame )) { rec->ExceptionFlags |= EH_STACK_INVALID; break; } /* Call handler */ TRACE( "calling handler at %p code=%x flags=%x\n", frame->Handler, rec->ExceptionCode, rec->ExceptionFlags ); res = EXC_CallHandler( rec, frame, context, &dispatch, frame->Handler, raise_handler ); TRACE( "handler at %p returned %x\n", frame->Handler, res ); if (frame == nested_frame) { /* no longer nested */ nested_frame = NULL; rec->ExceptionFlags &= ~EH_NESTED_CALL; } switch(res) { case ExceptionContinueExecution: if (!(rec->ExceptionFlags & EH_NONCONTINUABLE)) return STATUS_SUCCESS; return STATUS_NONCONTINUABLE_EXCEPTION; case ExceptionContinueSearch: break; case ExceptionNestedException: if (nested_frame < dispatch) nested_frame = dispatch; rec->ExceptionFlags |= EH_NESTED_CALL; break; default: return STATUS_INVALID_DISPOSITION; } frame = frame->Prev; } return STATUS_UNHANDLED_EXCEPTION; } /******************************************************************* * raise_exception * * Implementation of NtRaiseException. */ static NTSTATUS raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance ) { NTSTATUS status; if (first_chance) { DWORD c; TRACE( "code=%x flags=%x addr=%p ip=%08x tid=%04x\n", rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress, context->Eip, GetCurrentThreadId() ); for (c = 0; c < rec->NumberParameters; c++) TRACE( " info[%d]=%08lx\n", c, rec->ExceptionInformation[c] ); if (rec->ExceptionCode == EXCEPTION_WINE_STUB) { if (rec->ExceptionInformation[1] >> 16) MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n", rec->ExceptionAddress, (char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] ); else MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n", rec->ExceptionAddress, (char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] ); } else { TRACE(" eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n", context->Eax, context->Ebx, context->Ecx, context->Edx, context->Esi, context->Edi ); TRACE(" ebp=%08x esp=%08x cs=%04x ds=%04x es=%04x fs=%04x gs=%04x flags=%08x\n", context->Ebp, context->Esp, context->SegCs, context->SegDs, context->SegEs, context->SegFs, context->SegGs, context->EFlags ); } status = send_debug_event( rec, TRUE, context ); if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED) return STATUS_SUCCESS; /* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */ if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context->Eip--; if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION) return STATUS_SUCCESS; if ((status = call_stack_handlers( rec, context )) != STATUS_UNHANDLED_EXCEPTION) return status; } /* last chance exception */ status = send_debug_event( rec, FALSE, context ); if (status != DBG_CONTINUE) { if (rec->ExceptionFlags & EH_STACK_INVALID) WINE_ERR("Exception frame is not in stack limits => unable to dispatch exception.\n"); else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION) WINE_ERR("Process attempted to continue execution after noncontinuable exception.\n"); else WINE_ERR("Unhandled exception code %x flags %x addr %p\n", rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress ); NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode ); } return STATUS_SUCCESS; } #ifdef __HAVE_VM86 /*********************************************************************** * save_vm86_context * * Set the register values from a vm86 structure. */ static void save_vm86_context( CONTEXT *context, const struct vm86plus_struct *vm86 ) { context->ContextFlags = CONTEXT_FULL; context->Eax = vm86->regs.eax; context->Ebx = vm86->regs.ebx; context->Ecx = vm86->regs.ecx; context->Edx = vm86->regs.edx; context->Esi = vm86->regs.esi; context->Edi = vm86->regs.edi; context->Esp = vm86->regs.esp; context->Ebp = vm86->regs.ebp; context->Eip = vm86->regs.eip; context->SegCs = vm86->regs.cs; context->SegDs = vm86->regs.ds; context->SegEs = vm86->regs.es; context->SegFs = vm86->regs.fs; context->SegGs = vm86->regs.gs; context->SegSs = vm86->regs.ss; context->EFlags = vm86->regs.eflags; } /*********************************************************************** * restore_vm86_context * * Build a vm86 structure from the register values. */ static void restore_vm86_context( const CONTEXT *context, struct vm86plus_struct *vm86 ) { vm86->regs.eax = context->Eax; vm86->regs.ebx = context->Ebx; vm86->regs.ecx = context->Ecx; vm86->regs.edx = context->Edx; vm86->regs.esi = context->Esi; vm86->regs.edi = context->Edi; vm86->regs.esp = context->Esp; vm86->regs.ebp = context->Ebp; vm86->regs.eip = context->Eip; vm86->regs.cs = context->SegCs; vm86->regs.ds = context->SegDs; vm86->regs.es = context->SegEs; vm86->regs.fs = context->SegFs; vm86->regs.gs = context->SegGs; vm86->regs.ss = context->SegSs; vm86->regs.eflags = context->EFlags; } /********************************************************************** * merge_vm86_pending_flags * * Merges TEB.vm86_ptr and TEB.vm86_pending VIP flags and * raises exception if there are pending events and VIF flag * has been turned on. * * Called from __wine_enter_vm86 because vm86_enter * doesn't check for pending events. * * Called from raise_vm86_sti_exception to check for * pending events in a signal safe way. */ static void merge_vm86_pending_flags( EXCEPTION_RECORD *rec ) { BOOL check_pending = TRUE; struct vm86plus_struct *vm86 = (struct vm86plus_struct*)(ntdll_get_thread_data()->vm86_ptr); /* * In order to prevent a race when SIGUSR2 occurs while * we are returning from exception handler, pending events * will be rechecked after each raised exception. */ while (check_pending && get_vm86_teb_info()->vm86_pending) { check_pending = FALSE; ntdll_get_thread_data()->vm86_ptr = NULL; /* * If VIF is set, throw exception. * Note that SIGUSR2 may turn VIF flag off so * VIF check must occur only when TEB.vm86_ptr is NULL. */ if (vm86->regs.eflags & VIF_FLAG) { CONTEXT vcontext; save_vm86_context( &vcontext, vm86 ); rec->ExceptionCode = EXCEPTION_VM86_STI; rec->ExceptionFlags = EXCEPTION_CONTINUABLE; rec->ExceptionRecord = NULL; rec->NumberParameters = 0; rec->ExceptionAddress = (LPVOID)vcontext.Eip; vcontext.EFlags &= ~VIP_FLAG; get_vm86_teb_info()->vm86_pending = 0; raise_exception( rec, &vcontext, TRUE ); restore_vm86_context( &vcontext, vm86 ); check_pending = TRUE; } ntdll_get_thread_data()->vm86_ptr = vm86; } /* * Merge VIP flags in a signal safe way. This requires * that the following operation compiles into atomic * instruction. */ vm86->regs.eflags |= get_vm86_teb_info()->vm86_pending; } #endif /* __HAVE_VM86 */ #ifdef __sun /* We have to workaround two Solaris breakages: * - Solaris doesn't restore %ds and %es before calling the signal handler so exceptions in 16-bit * code crash badly. * - Solaris inserts a libc trampoline to call our handler, but the trampoline expects that registers * are setup correctly. So we need to insert our own trampoline below the libc trampoline to set %gs. */ extern int sigaction_syscall( int sig, const struct sigaction *new, struct sigaction *old ); __ASM_GLOBAL_FUNC( sigaction_syscall, "movl $0x62,%eax\n\t" "int $0x91\n\t" "ret" ) /* assume the same libc handler is used for all signals */ static void (*libc_sigacthandler)( int signal, siginfo_t *siginfo, void *context ); static void wine_sigacthandler( int signal, siginfo_t *siginfo, void *sigcontext ) { struct ntdll_thread_data *thread_data; __asm__ __volatile__("mov %ss,%ax; mov %ax,%ds; mov %ax,%es"); thread_data = (struct ntdll_thread_data *)get_current_teb()->SpareBytes1; wine_set_fs( thread_data->fs ); wine_set_gs( thread_data->gs ); libc_sigacthandler( signal, siginfo, sigcontext ); } static int solaris_sigaction( int sig, const struct sigaction *new, struct sigaction *old ) { struct sigaction real_act; if (sigaction( sig, new, old ) == -1) return -1; /* retrieve the real handler and flags with a direct syscall */ sigaction_syscall( sig, NULL, &real_act ); libc_sigacthandler = real_act.sa_sigaction; real_act.sa_sigaction = wine_sigacthandler; sigaction_syscall( sig, &real_act, NULL ); return 0; } #define sigaction(sig,new,old) solaris_sigaction(sig,new,old) #endif typedef void (WINAPI *raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context ); extern void clear_alignment_flag(void); __ASM_GLOBAL_FUNC( clear_alignment_flag, "pushfl\n\t" __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t") "andl $~0x40000,(%esp)\n\t" "popfl\n\t" __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t") "ret" ) /*********************************************************************** * init_handler * * Handler initialization when the full context is not needed. * Return the stack pointer to use for pushing the exception data. */ static inline void *init_handler( const SIGCONTEXT *sigcontext, WORD *fs, WORD *gs ) { TEB *teb = get_current_teb(); clear_alignment_flag(); /* get %fs and %gs at time of the fault */ #ifdef FS_sig *fs = LOWORD(FS_sig(sigcontext)); #else *fs = wine_get_fs(); #endif #ifdef GS_sig *gs = LOWORD(GS_sig(sigcontext)); #else *gs = wine_get_gs(); #endif #ifndef __sun /* see above for Solaris handling */ { struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)teb->SpareBytes1; wine_set_fs( thread_data->fs ); wine_set_gs( thread_data->gs ); } #endif if (!wine_ldt_is_system(CS_sig(sigcontext)) || !wine_ldt_is_system(SS_sig(sigcontext))) /* 16-bit mode */ { /* * Win16 or DOS protected mode. Note that during switch * from 16-bit mode to linear mode, CS may be set to system * segment before FS is restored. Fortunately, in this case * SS is still non-system segment. This is why both CS and SS * are checked. */ return teb->WOW32Reserved; } return (void *)(ESP_sig(sigcontext) & ~3); } /*********************************************************************** * save_fpu * * Save the thread FPU context. */ static inline void save_fpu( CONTEXT *context ) { #ifdef __GNUC__ context->ContextFlags |= CONTEXT_FLOATING_POINT; __asm__ __volatile__( "fnsave %0; fwait" : "=m" (context->FloatSave) ); #endif } /*********************************************************************** * save_fpux * * Save the thread FPU extended context. */ static inline void save_fpux( CONTEXT *context ) { #ifdef __GNUC__ /* we have to enforce alignment by hand */ char buffer[sizeof(XMM_SAVE_AREA32) + 16]; XMM_SAVE_AREA32 *state = (XMM_SAVE_AREA32 *)(((ULONG_PTR)buffer + 15) & ~15); __asm__ __volatile__( "fxsave %0" : "=m" (*state) ); context->ContextFlags |= CONTEXT_EXTENDED_REGISTERS; memcpy( context->ExtendedRegisters, state, sizeof(*state) ); #endif } /*********************************************************************** * restore_fpu * * Restore the FPU context to a sigcontext. */ static inline void restore_fpu( const CONTEXT *context ) { FLOATING_SAVE_AREA float_status = context->FloatSave; /* reset the current interrupt status */ float_status.StatusWord &= float_status.ControlWord | 0xffffff80; #ifdef __GNUC__ __asm__ __volatile__( "frstor %0; fwait" : : "m" (float_status) ); #endif /* __GNUC__ */ } /*********************************************************************** * restore_fpux * * Restore the FPU extended context to a sigcontext. */ static inline void restore_fpux( const CONTEXT *context ) { #ifdef __GNUC__ /* we have to enforce alignment by hand */ char buffer[sizeof(XMM_SAVE_AREA32) + 16]; XMM_SAVE_AREA32 *state = (XMM_SAVE_AREA32 *)(((ULONG_PTR)buffer + 15) & ~15); memcpy( state, context->ExtendedRegisters, sizeof(*state) ); /* reset the current interrupt status */ state->StatusWord &= state->ControlWord | 0xff80; __asm__ __volatile__( "fxrstor %0" : : "m" (*state) ); #endif } /*********************************************************************** * fpux_to_fpu * * Build a standard FPU context from an extended one. */ static void fpux_to_fpu( FLOATING_SAVE_AREA *fpu, const XMM_SAVE_AREA32 *fpux ) { unsigned int i, tag, stack_top; fpu->ControlWord = fpux->ControlWord | 0xffff0000; fpu->StatusWord = fpux->StatusWord | 0xffff0000; fpu->ErrorOffset = fpux->ErrorOffset; fpu->ErrorSelector = fpux->ErrorSelector | (fpux->ErrorOpcode << 16); fpu->DataOffset = fpux->DataOffset; fpu->DataSelector = fpux->DataSelector; fpu->Cr0NpxState = fpux->StatusWord | 0xffff0000; stack_top = (fpux->StatusWord >> 11) & 7; fpu->TagWord = 0xffff0000; for (i = 0; i < 8; i++) { memcpy( &fpu->RegisterArea[10 * i], &fpux->FloatRegisters[i], 10 ); if (!(fpux->TagWord & (1 << i))) tag = 3; /* empty */ else { const M128A *reg = &fpux->FloatRegisters[(i - stack_top) & 7]; if ((reg->High & 0x7fff) == 0x7fff) /* exponent all ones */ { tag = 2; /* special */ } else if (!(reg->High & 0x7fff)) /* exponent all zeroes */ { if (reg->Low) tag = 2; /* special */ else tag = 1; /* zero */ } else { if (reg->Low >> 63) tag = 0; /* valid */ else tag = 2; /* special */ } } fpu->TagWord |= tag << (2 * i); } } /*********************************************************************** * save_context * * Build a context structure from the signal info. */ static inline void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext, WORD fs, WORD gs ) { struct ntdll_thread_data * const regs = ntdll_get_thread_data(); FLOATING_SAVE_AREA *fpu = FPU_sig(sigcontext); XMM_SAVE_AREA32 *fpux = FPUX_sig(sigcontext); memset(context, 0, sizeof(*context)); context->ContextFlags = CONTEXT_FULL | CONTEXT_DEBUG_REGISTERS; context->Eax = EAX_sig(sigcontext); context->Ebx = EBX_sig(sigcontext); context->Ecx = ECX_sig(sigcontext); context->Edx = EDX_sig(sigcontext); context->Esi = ESI_sig(sigcontext); context->Edi = EDI_sig(sigcontext); context->Ebp = EBP_sig(sigcontext); context->EFlags = EFL_sig(sigcontext); context->Eip = EIP_sig(sigcontext); context->Esp = ESP_sig(sigcontext); context->SegCs = LOWORD(CS_sig(sigcontext)); context->SegDs = LOWORD(DS_sig(sigcontext)); context->SegEs = LOWORD(ES_sig(sigcontext)); context->SegFs = fs; context->SegGs = gs; context->SegSs = LOWORD(SS_sig(sigcontext)); context->Dr0 = regs->dr0; context->Dr1 = regs->dr1; context->Dr2 = regs->dr2; context->Dr3 = regs->dr3; context->Dr6 = regs->dr6; context->Dr7 = regs->dr7; if (fpu) { context->ContextFlags |= CONTEXT_FLOATING_POINT; context->FloatSave = *fpu; } if (fpux) { context->ContextFlags |= CONTEXT_FLOATING_POINT | CONTEXT_EXTENDED_REGISTERS; memcpy( context->ExtendedRegisters, fpux, sizeof(*fpux) ); fpux_support = 1; if (!fpu) fpux_to_fpu( &context->FloatSave, fpux ); } if (!fpu && !fpux) save_fpu( context ); } /*********************************************************************** * restore_context * * Restore the signal info from the context. */ static inline void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext ) { struct ntdll_thread_data * const regs = ntdll_get_thread_data(); FLOATING_SAVE_AREA *fpu = FPU_sig(sigcontext); XMM_SAVE_AREA32 *fpux = FPUX_sig(sigcontext); regs->dr0 = context->Dr0; regs->dr1 = context->Dr1; regs->dr2 = context->Dr2; regs->dr3 = context->Dr3; regs->dr6 = context->Dr6; regs->dr7 = context->Dr7; EAX_sig(sigcontext) = context->Eax; EBX_sig(sigcontext) = context->Ebx; ECX_sig(sigcontext) = context->Ecx; EDX_sig(sigcontext) = context->Edx; ESI_sig(sigcontext) = context->Esi; EDI_sig(sigcontext) = context->Edi; EBP_sig(sigcontext) = context->Ebp; EFL_sig(sigcontext) = context->EFlags; EIP_sig(sigcontext) = context->Eip; ESP_sig(sigcontext) = context->Esp; CS_sig(sigcontext) = context->SegCs; DS_sig(sigcontext) = context->SegDs; ES_sig(sigcontext) = context->SegEs; SS_sig(sigcontext) = context->SegSs; #ifdef GS_sig GS_sig(sigcontext) = context->SegGs; #else wine_set_gs( context->SegGs ); #endif #ifdef FS_sig FS_sig(sigcontext) = context->SegFs; #else wine_set_fs( context->SegFs ); #endif if (fpu) *fpu = context->FloatSave; if (fpux) memcpy( fpux, context->ExtendedRegisters, sizeof(*fpux) ); if (!fpu && !fpux) restore_fpu( context ); } /*********************************************************************** * RtlCaptureContext (NTDLL.@) */ __ASM_STDCALL_FUNC( RtlCaptureContext, 4, "pushl %eax\n\t" __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t") "movl 8(%esp),%eax\n\t" /* context */ "movl $0x10007,(%eax)\n\t" /* context->ContextFlags */ "movw %gs,0x8c(%eax)\n\t" /* context->SegGs */ "movw %fs,0x90(%eax)\n\t" /* context->SegFs */ "movw %es,0x94(%eax)\n\t" /* context->SegEs */ "movw %ds,0x98(%eax)\n\t" /* context->SegDs */ "movl %edi,0x9c(%eax)\n\t" /* context->Edi */ "movl %esi,0xa0(%eax)\n\t" /* context->Esi */ "movl %ebx,0xa4(%eax)\n\t" /* context->Ebx */ "movl %edx,0xa8(%eax)\n\t" /* context->Edx */ "movl %ecx,0xac(%eax)\n\t" /* context->Ecx */ "movl %ebp,0xb4(%eax)\n\t" /* context->Ebp */ "movl 4(%esp),%edx\n\t" "movl %edx,0xb8(%eax)\n\t" /* context->Eip */ "movw %cs,0xbc(%eax)\n\t" /* context->SegCs */ "pushfl\n\t" __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t") "popl 0xc0(%eax)\n\t" /* context->EFlags */ __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t") "leal 8(%esp),%edx\n\t" "movl %edx,0xc4(%eax)\n\t" /* context->Esp */ "movw %ss,0xc8(%eax)\n\t" /* context->SegSs */ "popl 0xb0(%eax)\n\t" /* context->Eax */ __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t") "ret $4" ) /*********************************************************************** * set_cpu_context * * Set the new CPU context. Used by NtSetContextThread. */ void set_cpu_context( const CONTEXT *context ) { DWORD flags = context->ContextFlags & ~CONTEXT_i386; if ((flags & CONTEXT_EXTENDED_REGISTERS) && fpux_support) restore_fpux( context ); else if (flags & CONTEXT_FLOATING_POINT) restore_fpu( context ); if (flags & CONTEXT_DEBUG_REGISTERS) { ntdll_get_thread_data()->dr0 = context->Dr0; ntdll_get_thread_data()->dr1 = context->Dr1; ntdll_get_thread_data()->dr2 = context->Dr2; ntdll_get_thread_data()->dr3 = context->Dr3; ntdll_get_thread_data()->dr6 = context->Dr6; ntdll_get_thread_data()->dr7 = context->Dr7; } if (flags & CONTEXT_FULL) { if (!(flags & CONTEXT_CONTROL)) FIXME( "setting partial context (%x) not supported\n", flags ); else if (flags & CONTEXT_SEGMENTS) __wine_restore_regs( context ); else { CONTEXT newcontext = *context; newcontext.SegDs = wine_get_ds(); newcontext.SegEs = wine_get_es(); newcontext.SegFs = wine_get_fs(); newcontext.SegGs = wine_get_gs(); __wine_restore_regs( &newcontext ); } } } /*********************************************************************** * set_debug_registers */ static void set_debug_registers( const CONTEXT *context ) { DWORD flags = context->ContextFlags & ~CONTEXT_i386; context_t server_context; if (!(flags & CONTEXT_DEBUG_REGISTERS)) return; if (ntdll_get_thread_data()->dr0 == context->Dr0 && ntdll_get_thread_data()->dr1 == context->Dr1 && ntdll_get_thread_data()->dr2 == context->Dr2 && ntdll_get_thread_data()->dr3 == context->Dr3 && ntdll_get_thread_data()->dr6 == context->Dr6 && ntdll_get_thread_data()->dr7 == context->Dr7) return; context_to_server( &server_context, context ); SERVER_START_REQ( set_thread_context ) { req->handle = wine_server_obj_handle( GetCurrentThread() ); req->suspend = 0; wine_server_add_data( req, &server_context, sizeof(server_context) ); wine_server_call( req ); } SERVER_END_REQ; } /*********************************************************************** * copy_context * * Copy a register context according to the flags. */ void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags ) { flags &= ~CONTEXT_i386; /* get rid of CPU id */ if (flags & CONTEXT_INTEGER) { to->Eax = from->Eax; to->Ebx = from->Ebx; to->Ecx = from->Ecx; to->Edx = from->Edx; to->Esi = from->Esi; to->Edi = from->Edi; } if (flags & CONTEXT_CONTROL) { to->Ebp = from->Ebp; to->Esp = from->Esp; to->Eip = from->Eip; to->SegCs = from->SegCs; to->SegSs = from->SegSs; to->EFlags = from->EFlags; } if (flags & CONTEXT_SEGMENTS) { to->SegDs = from->SegDs; to->SegEs = from->SegEs; to->SegFs = from->SegFs; to->SegGs = from->SegGs; } if (flags & CONTEXT_DEBUG_REGISTERS) { to->Dr0 = from->Dr0; to->Dr1 = from->Dr1; to->Dr2 = from->Dr2; to->Dr3 = from->Dr3; to->Dr6 = from->Dr6; to->Dr7 = from->Dr7; } if (flags & CONTEXT_FLOATING_POINT) { to->FloatSave = from->FloatSave; } if (flags & CONTEXT_EXTENDED_REGISTERS) { memcpy( to->ExtendedRegisters, from->ExtendedRegisters, sizeof(to->ExtendedRegisters) ); } } /*********************************************************************** * context_to_server * * Convert a register context to the server format. */ NTSTATUS context_to_server( context_t *to, const CONTEXT *from ) { DWORD flags = from->ContextFlags & ~CONTEXT_i386; /* get rid of CPU id */ memset( to, 0, sizeof(*to) ); to->cpu = CPU_x86; if (flags & CONTEXT_CONTROL) { to->flags |= SERVER_CTX_CONTROL; to->ctl.i386_regs.ebp = from->Ebp; to->ctl.i386_regs.esp = from->Esp; to->ctl.i386_regs.eip = from->Eip; to->ctl.i386_regs.cs = from->SegCs; to->ctl.i386_regs.ss = from->SegSs; to->ctl.i386_regs.eflags = from->EFlags; } if (flags & CONTEXT_INTEGER) { to->flags |= SERVER_CTX_INTEGER; to->integer.i386_regs.eax = from->Eax; to->integer.i386_regs.ebx = from->Ebx; to->integer.i386_regs.ecx = from->Ecx; to->integer.i386_regs.edx = from->Edx; to->integer.i386_regs.esi = from->Esi; to->integer.i386_regs.edi = from->Edi; } if (flags & CONTEXT_SEGMENTS) { to->flags |= SERVER_CTX_SEGMENTS; to->seg.i386_regs.ds = from->SegDs; to->seg.i386_regs.es = from->SegEs; to->seg.i386_regs.fs = from->SegFs; to->seg.i386_regs.gs = from->SegGs; } if (flags & CONTEXT_FLOATING_POINT) { to->flags |= SERVER_CTX_FLOATING_POINT; to->fp.i386_regs.ctrl = from->FloatSave.ControlWord; to->fp.i386_regs.status = from->FloatSave.StatusWord; to->fp.i386_regs.tag = from->FloatSave.TagWord; to->fp.i386_regs.err_off = from->FloatSave.ErrorOffset; to->fp.i386_regs.err_sel = from->FloatSave.ErrorSelector; to->fp.i386_regs.data_off = from->FloatSave.DataOffset; to->fp.i386_regs.data_sel = from->FloatSave.DataSelector; to->fp.i386_regs.cr0npx = from->FloatSave.Cr0NpxState; memcpy( to->fp.i386_regs.regs, from->FloatSave.RegisterArea, sizeof(to->fp.i386_regs.regs) ); } if (flags & CONTEXT_DEBUG_REGISTERS) { to->flags |= SERVER_CTX_DEBUG_REGISTERS; to->debug.i386_regs.dr0 = from->Dr0; to->debug.i386_regs.dr1 = from->Dr1; to->debug.i386_regs.dr2 = from->Dr2; to->debug.i386_regs.dr3 = from->Dr3; to->debug.i386_regs.dr6 = from->Dr6; to->debug.i386_regs.dr7 = from->Dr7; } if (flags & CONTEXT_EXTENDED_REGISTERS) { to->flags |= SERVER_CTX_EXTENDED_REGISTERS; memcpy( to->ext.i386_regs, from->ExtendedRegisters, sizeof(to->ext.i386_regs) ); } return STATUS_SUCCESS; } /*********************************************************************** * context_from_server * * Convert a register context from the server format. */ NTSTATUS context_from_server( CONTEXT *to, const context_t *from ) { if (from->cpu != CPU_x86) return STATUS_INVALID_PARAMETER; to->ContextFlags = CONTEXT_i386; if (from->flags & SERVER_CTX_CONTROL) { to->ContextFlags |= CONTEXT_CONTROL; to->Ebp = from->ctl.i386_regs.ebp; to->Esp = from->ctl.i386_regs.esp; to->Eip = from->ctl.i386_regs.eip; to->SegCs = from->ctl.i386_regs.cs; to->SegSs = from->ctl.i386_regs.ss; to->EFlags = from->ctl.i386_regs.eflags; } if (from->flags & SERVER_CTX_INTEGER) { to->ContextFlags |= CONTEXT_INTEGER; to->Eax = from->integer.i386_regs.eax; to->Ebx = from->integer.i386_regs.ebx; to->Ecx = from->integer.i386_regs.ecx; to->Edx = from->integer.i386_regs.edx; to->Esi = from->integer.i386_regs.esi; to->Edi = from->integer.i386_regs.edi; } if (from->flags & SERVER_CTX_SEGMENTS) { to->ContextFlags |= CONTEXT_SEGMENTS; to->SegDs = from->seg.i386_regs.ds; to->SegEs = from->seg.i386_regs.es; to->SegFs = from->seg.i386_regs.fs; to->SegGs = from->seg.i386_regs.gs; } if (from->flags & SERVER_CTX_FLOATING_POINT) { to->ContextFlags |= CONTEXT_FLOATING_POINT; to->FloatSave.ControlWord = from->fp.i386_regs.ctrl; to->FloatSave.StatusWord = from->fp.i386_regs.status; to->FloatSave.TagWord = from->fp.i386_regs.tag; to->FloatSave.ErrorOffset = from->fp.i386_regs.err_off; to->FloatSave.ErrorSelector = from->fp.i386_regs.err_sel; to->FloatSave.DataOffset = from->fp.i386_regs.data_off; to->FloatSave.DataSelector = from->fp.i386_regs.data_sel; to->FloatSave.Cr0NpxState = from->fp.i386_regs.cr0npx; memcpy( to->FloatSave.RegisterArea, from->fp.i386_regs.regs, sizeof(to->FloatSave.RegisterArea) ); } if (from->flags & SERVER_CTX_DEBUG_REGISTERS) { to->ContextFlags |= CONTEXT_DEBUG_REGISTERS; to->Dr0 = from->debug.i386_regs.dr0; to->Dr1 = from->debug.i386_regs.dr1; to->Dr2 = from->debug.i386_regs.dr2; to->Dr3 = from->debug.i386_regs.dr3; to->Dr6 = from->debug.i386_regs.dr6; to->Dr7 = from->debug.i386_regs.dr7; } if (from->flags & SERVER_CTX_EXTENDED_REGISTERS) { to->ContextFlags |= CONTEXT_EXTENDED_REGISTERS; memcpy( to->ExtendedRegisters, from->ext.i386_regs, sizeof(to->ExtendedRegisters) ); } return STATUS_SUCCESS; } /*********************************************************************** * is_privileged_instr * * Check if the fault location is a privileged instruction. * Based on the instruction emulation code in dlls/kernel/instr.c. */ static inline DWORD is_privileged_instr( CONTEXT *context ) { const BYTE *instr; unsigned int prefix_count = 0; if (!wine_ldt_is_system( context->SegCs )) return 0; instr = (BYTE *)context->Eip; for (;;) switch(*instr) { /* instruction prefixes */ case 0x2e: /* %cs: */ case 0x36: /* %ss: */ case 0x3e: /* %ds: */ case 0x26: /* %es: */ case 0x64: /* %fs: */ case 0x65: /* %gs: */ case 0x66: /* opcode size */ case 0x67: /* addr size */ case 0xf0: /* lock */ case 0xf2: /* repne */ case 0xf3: /* repe */ if (++prefix_count >= 15) return EXCEPTION_ILLEGAL_INSTRUCTION; instr++; continue; case 0x0f: /* extended instruction */ switch(instr[1]) { case 0x20: /* mov crX, reg */ case 0x21: /* mov drX, reg */ case 0x22: /* mov reg, crX */ case 0x23: /* mov reg drX */ return EXCEPTION_PRIV_INSTRUCTION; } return 0; case 0x6c: /* insb (%dx) */ case 0x6d: /* insl (%dx) */ case 0x6e: /* outsb (%dx) */ case 0x6f: /* outsl (%dx) */ case 0xcd: /* int $xx */ case 0xe4: /* inb al,XX */ case 0xe5: /* in (e)ax,XX */ case 0xe6: /* outb XX,al */ case 0xe7: /* out XX,(e)ax */ case 0xec: /* inb (%dx),%al */ case 0xed: /* inl (%dx),%eax */ case 0xee: /* outb %al,(%dx) */ case 0xef: /* outl %eax,(%dx) */ case 0xf4: /* hlt */ case 0xfa: /* cli */ case 0xfb: /* sti */ return EXCEPTION_PRIV_INSTRUCTION; default: return 0; } } #include "pshpack1.h" struct atl_thunk { DWORD movl; /* movl this,4(%esp) */ DWORD this; BYTE jmp; /* jmp func */ int func; }; #include "poppack.h" /********************************************************************** * check_atl_thunk * * Check if code destination is an ATL thunk, and emulate it if so. */ static BOOL check_atl_thunk( EXCEPTION_RECORD *rec, CONTEXT *context ) { const struct atl_thunk *thunk = (const struct atl_thunk *)rec->ExceptionInformation[1]; BOOL ret = FALSE; __TRY { if (thunk->movl == 0x042444c7 && thunk->jmp == 0xe9) { *((DWORD *)context->Esp + 1) = thunk->this; context->Eip = (DWORD_PTR)(&thunk->func + 1) + thunk->func; TRACE( "emulating ATL thunk at %p, func=%08x arg=%08x\n", thunk, context->Eip, *((DWORD *)context->Esp + 1) ); ret = TRUE; } } __EXCEPT_PAGE_FAULT { return FALSE; } __ENDTRY return ret; } /*********************************************************************** * setup_exception_record * * Setup the exception record and context on the thread stack. */ static EXCEPTION_RECORD *setup_exception_record( SIGCONTEXT *sigcontext, void *stack_ptr, WORD fs, WORD gs, raise_func func ) { struct stack_layout { void *ret_addr; /* return address from raise_func */ EXCEPTION_RECORD *rec_ptr; /* first arg for raise_func */ CONTEXT *context_ptr; /* second arg for raise_func */ CONTEXT context; EXCEPTION_RECORD rec; DWORD ebp; DWORD eip; } *stack = stack_ptr; DWORD exception_code = 0; /* stack sanity checks */ if ((char *)stack >= (char *)get_signal_stack() && (char *)stack < (char *)get_signal_stack() + signal_stack_size) { WINE_ERR( "nested exception on signal stack in thread %04x eip %08x esp %08x stack %p-%p\n", GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext), (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase ); abort_thread(1); } if (stack - 1 > stack || /* check for overflow in subtraction */ (char *)stack <= (char *)NtCurrentTeb()->DeallocationStack || (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase) { WARN( "exception outside of stack limits in thread %04x eip %08x esp %08x stack %p-%p\n", GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext), (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase ); } else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->DeallocationStack + 4096) { /* stack overflow on last page, unrecoverable */ UINT diff = (char *)NtCurrentTeb()->DeallocationStack + 4096 - (char *)(stack - 1); WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n", diff, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext), (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->DeallocationStack, NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase ); abort_thread(1); } else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit) { /* stack access below stack limit, may be recoverable */ if (virtual_handle_stack_fault( stack - 1 )) exception_code = EXCEPTION_STACK_OVERFLOW; else { UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)(stack - 1); WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n", diff, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext), (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->DeallocationStack, NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase ); abort_thread(1); } } stack--; /* push the stack_layout structure */ #if defined(VALGRIND_MAKE_MEM_UNDEFINED) VALGRIND_MAKE_MEM_UNDEFINED(stack, sizeof(*stack)); #elif defined(VALGRIND_MAKE_WRITABLE) VALGRIND_MAKE_WRITABLE(stack, sizeof(*stack)); #endif stack->ret_addr = (void *)0xdeadbabe; /* raise_func must not return */ stack->rec_ptr = &stack->rec; stack->context_ptr = &stack->context; stack->rec.ExceptionRecord = NULL; stack->rec.ExceptionCode = exception_code; stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE; stack->rec.ExceptionAddress = (LPVOID)EIP_sig(sigcontext); stack->rec.NumberParameters = 0; save_context( &stack->context, sigcontext, fs, gs ); /* now modify the sigcontext to return to the raise function */ ESP_sig(sigcontext) = (DWORD)stack; EIP_sig(sigcontext) = (DWORD)func; /* clear single-step, direction, and align check flag */ EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000); CS_sig(sigcontext) = wine_get_cs(); DS_sig(sigcontext) = wine_get_ds(); ES_sig(sigcontext) = wine_get_es(); FS_sig(sigcontext) = wine_get_fs(); GS_sig(sigcontext) = wine_get_gs(); SS_sig(sigcontext) = wine_get_ss(); return stack->rec_ptr; } /*********************************************************************** * setup_exception * * Setup a proper stack frame for the raise function, and modify the * sigcontext so that the return from the signal handler will call * the raise function. */ static EXCEPTION_RECORD *setup_exception( SIGCONTEXT *sigcontext, raise_func func ) { WORD fs, gs; void *stack = init_handler( sigcontext, &fs, &gs ); return setup_exception_record( sigcontext, stack, fs, gs, func ); } /*********************************************************************** * get_exception_context * * Get a pointer to the context built by setup_exception. */ static inline CONTEXT *get_exception_context( EXCEPTION_RECORD *rec ) { return (CONTEXT *)rec - 1; /* cf. stack_layout structure */ } /********************************************************************** * get_fpu_code * * Get the FPU exception code from the FPU status. */ static inline DWORD get_fpu_code( const CONTEXT *context ) { DWORD status = context->FloatSave.StatusWord & ~(context->FloatSave.ControlWord & 0x3f); if (status & 0x01) /* IE */ { if (status & 0x40) /* SF */ return EXCEPTION_FLT_STACK_CHECK; else return EXCEPTION_FLT_INVALID_OPERATION; } if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */ if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */ if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */ if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */ if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */ return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */ } /********************************************************************** * raise_segv_exception */ static void WINAPI raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context ) { NTSTATUS status; switch(rec->ExceptionCode) { case EXCEPTION_ACCESS_VIOLATION: if (rec->NumberParameters == 2) { if (rec->ExceptionInformation[0] == EXCEPTION_EXECUTE_FAULT && check_atl_thunk( rec, context )) goto done; if (!(rec->ExceptionCode = virtual_handle_fault( (void *)rec->ExceptionInformation[1], rec->ExceptionInformation[0] ))) goto done; /* send EXCEPTION_EXECUTE_FAULT only if data execution prevention is enabled */ if (rec->ExceptionInformation[0] == EXCEPTION_EXECUTE_FAULT) { ULONG flags; NtQueryInformationProcess( GetCurrentProcess(), ProcessExecuteFlags, &flags, sizeof(flags), NULL ); if (!(flags & MEM_EXECUTE_OPTION_DISABLE)) rec->ExceptionInformation[0] = EXCEPTION_READ_FAULT; } } break; case EXCEPTION_DATATYPE_MISALIGNMENT: /* FIXME: pass through exception handler first? */ if (context->EFlags & 0x00040000) { /* Disable AC flag, return */ context->EFlags &= ~0x00040000; goto done; } break; } status = NtRaiseException( rec, context, TRUE ); raise_status( status, rec ); done: set_cpu_context( context ); } /********************************************************************** * raise_trap_exception */ static void WINAPI raise_trap_exception( EXCEPTION_RECORD *rec, CONTEXT *context ) { NTSTATUS status; if (rec->ExceptionCode == EXCEPTION_SINGLE_STEP) { /* when single stepping can't tell whether this is a hw bp or a * single step interrupt. try to avoid as much overhead as possible * and only do a server call if there is any hw bp enabled. */ if( !(context->EFlags & 0x100) || (ntdll_get_thread_data()->dr7 & 0xff) ) { /* (possible) hardware breakpoint, fetch the debug registers */ context->ContextFlags = CONTEXT_DEBUG_REGISTERS; NtGetContextThread(GetCurrentThread(), context); context->ContextFlags |= CONTEXT_FULL; /* restore flags */ } context->EFlags &= ~0x100; /* clear single-step flag */ } status = NtRaiseException( rec, context, TRUE ); raise_status( status, rec ); } /********************************************************************** * raise_generic_exception * * Generic raise function for exceptions that don't need special treatment. */ static void WINAPI raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *context ) { NTSTATUS status; status = NtRaiseException( rec, context, TRUE ); raise_status( status, rec ); } #ifdef __HAVE_VM86 /********************************************************************** * raise_vm86_sti_exception */ static void WINAPI raise_vm86_sti_exception( EXCEPTION_RECORD *rec, CONTEXT *context ) { /* merge_vm86_pending_flags merges the vm86_pending flag in safely */ get_vm86_teb_info()->vm86_pending |= VIP_FLAG; if (ntdll_get_thread_data()->vm86_ptr) { if (((char*)context->Eip >= (char*)vm86_return) && ((char*)context->Eip <= (char*)vm86_return_end) && (VM86_TYPE(context->Eax) != VM86_SIGNAL)) { /* exiting from VM86, can't throw */ goto done; } merge_vm86_pending_flags( rec ); } else if (get_vm86_teb_info()->dpmi_vif && !wine_ldt_is_system(context->SegCs) && !wine_ldt_is_system(context->SegSs)) { /* Executing DPMI code and virtual interrupts are enabled. */ get_vm86_teb_info()->vm86_pending = 0; NtRaiseException( rec, context, TRUE ); } done: set_cpu_context( context ); } /********************************************************************** * usr2_handler * * Handler for SIGUSR2. * We use it to signal that the running __wine_enter_vm86() should * immediately set VIP_FLAG, causing pending events to be handled * as early as possible. */ static void usr2_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_vm86_sti_exception ); rec->ExceptionCode = EXCEPTION_VM86_STI; } #endif /* __HAVE_VM86 */ /********************************************************************** * segv_handler * * Handler for SIGSEGV and related errors. */ static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { WORD fs, gs; EXCEPTION_RECORD *rec; SIGCONTEXT *context = sigcontext; void *stack = init_handler( sigcontext, &fs, &gs ); /* check for page fault inside the thread stack */ if (get_trap_code(context) == TRAP_x86_PAGEFLT && (char *)siginfo->si_addr >= (char *)NtCurrentTeb()->DeallocationStack && (char *)siginfo->si_addr < (char *)NtCurrentTeb()->Tib.StackBase && virtual_handle_stack_fault( siginfo->si_addr )) { /* check if this was the last guard page */ if ((char *)siginfo->si_addr < (char *)NtCurrentTeb()->DeallocationStack + 2*4096) { rec = setup_exception_record( context, stack, fs, gs, raise_segv_exception ); rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW; } return; } rec = setup_exception_record( context, stack, fs, gs, raise_segv_exception ); if (rec->ExceptionCode == EXCEPTION_STACK_OVERFLOW) return; switch(get_trap_code(context)) { case TRAP_x86_OFLOW: /* Overflow exception */ rec->ExceptionCode = EXCEPTION_INT_OVERFLOW; break; case TRAP_x86_BOUND: /* Bound range exception */ rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED; break; case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */ rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; break; case TRAP_x86_STKFLT: /* Stack fault */ rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW; break; case TRAP_x86_SEGNPFLT: /* Segment not present exception */ case TRAP_x86_PROTFLT: /* General protection fault */ case TRAP_x86_UNKNOWN: /* Unknown fault code */ { WORD err = get_error_code(context); if (!err && (rec->ExceptionCode = is_privileged_instr( get_exception_context(rec) ))) break; rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION; rec->NumberParameters = 2; rec->ExceptionInformation[0] = 0; /* if error contains a LDT selector, use that as fault address */ if ((err & 7) == 4 && !wine_ldt_is_system( err | 7 )) rec->ExceptionInformation[1] = err & ~7; else rec->ExceptionInformation[1] = 0xffffffff; } break; case TRAP_x86_PAGEFLT: /* Page fault */ rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION; rec->NumberParameters = 2; rec->ExceptionInformation[0] = (get_error_code(context) >> 1) & 0x09; rec->ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr; break; case TRAP_x86_ALIGNFLT: /* Alignment check exception */ rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT; break; default: WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) ); /* fall through */ case TRAP_x86_NMI: /* NMI interrupt */ case TRAP_x86_DNA: /* Device not available exception */ case TRAP_x86_DOUBLEFLT: /* Double fault exception */ case TRAP_x86_TSSFLT: /* Invalid TSS exception */ case TRAP_x86_MCHK: /* Machine check exception */ case TRAP_x86_CACHEFLT: /* Cache flush exception */ rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; break; } } /********************************************************************** * trap_handler * * Handler for SIGTRAP. */ static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { SIGCONTEXT *context = sigcontext; EXCEPTION_RECORD *rec = setup_exception( context, raise_trap_exception ); switch(get_trap_code(context)) { case TRAP_x86_TRCTRAP: /* Single-step exception */ rec->ExceptionCode = EXCEPTION_SINGLE_STEP; break; case TRAP_x86_BPTFLT: /* Breakpoint exception */ rec->ExceptionAddress = (char *)rec->ExceptionAddress - 1; /* back up over the int3 instruction */ /* fall through */ default: rec->ExceptionCode = EXCEPTION_BREAKPOINT; break; } } /********************************************************************** * fpe_handler * * Handler for SIGFPE. */ static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { CONTEXT *win_context; SIGCONTEXT *context = sigcontext; EXCEPTION_RECORD *rec = setup_exception( context, raise_generic_exception ); win_context = get_exception_context( rec ); switch(get_trap_code(context)) { case TRAP_x86_DIVIDE: /* Division by zero exception */ rec->ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO; break; case TRAP_x86_FPOPFLT: /* Coprocessor segment overrun */ rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION; break; case TRAP_x86_ARITHTRAP: /* Floating point exception */ case TRAP_x86_UNKNOWN: /* Unknown fault code */ rec->ExceptionCode = get_fpu_code( win_context ); rec->ExceptionAddress = (LPVOID)win_context->FloatSave.ErrorOffset; break; case TRAP_x86_CACHEFLT: /* SIMD exception */ /* TODO: * Behaviour only tested for divide-by-zero exceptions * Check for other SIMD exceptions as well */ if(siginfo->si_code != FPE_FLTDIV) FIXME("untested SIMD exception: %#x. Might not work correctly\n", siginfo->si_code); rec->ExceptionCode = STATUS_FLOAT_MULTIPLE_TRAPS; rec->NumberParameters = 1; /* no idea what meaning is actually behind this but that's what native does */ rec->ExceptionInformation[0] = 0; break; default: WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) ); rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION; break; } } /********************************************************************** * int_handler * * Handler for SIGINT. * * FIXME: should not be calling external functions on the signal stack. */ static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { WORD fs, gs; init_handler( sigcontext, &fs, &gs ); if (!dispatch_signal(SIGINT)) { EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception ); rec->ExceptionCode = CONTROL_C_EXIT; } } /********************************************************************** * abrt_handler * * Handler for SIGABRT. */ static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception ); rec->ExceptionCode = EXCEPTION_WINE_ASSERTION; rec->ExceptionFlags = EH_NONCONTINUABLE; } /********************************************************************** * quit_handler * * Handler for SIGQUIT. */ static void quit_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { WORD fs, gs; init_handler( sigcontext, &fs, &gs ); abort_thread(0); } /********************************************************************** * usr1_handler * * Handler for SIGUSR1, used to signal a thread that it got suspended. */ static void usr1_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { CONTEXT context; WORD fs, gs; init_handler( sigcontext, &fs, &gs ); save_context( &context, sigcontext, fs, gs ); wait_suspend( &context ); restore_context( &context, sigcontext ); } /*********************************************************************** * __wine_set_signal_handler (NTDLL.@) */ int CDECL __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; } /*********************************************************************** * locking for LDT routines */ static RTL_CRITICAL_SECTION ldt_section; static RTL_CRITICAL_SECTION_DEBUG critsect_debug = { 0, 0, &ldt_section, { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList }, 0, 0, { (DWORD_PTR)(__FILE__ ": ldt_section") } }; static RTL_CRITICAL_SECTION ldt_section = { &critsect_debug, -1, 0, 0, 0, 0 }; static sigset_t ldt_sigset; static void ldt_lock(void) { sigset_t sigset; pthread_sigmask( SIG_BLOCK, &server_block_set, &sigset ); RtlEnterCriticalSection( &ldt_section ); if (ldt_section.RecursionCount == 1) ldt_sigset = sigset; } static void ldt_unlock(void) { if (ldt_section.RecursionCount == 1) { sigset_t sigset = ldt_sigset; RtlLeaveCriticalSection( &ldt_section ); pthread_sigmask( SIG_SETMASK, &sigset, NULL ); } else RtlLeaveCriticalSection( &ldt_section ); } /********************************************************************** * signal_alloc_thread */ NTSTATUS signal_alloc_thread( TEB **teb ) { static size_t sigstack_zero_bits; struct ntdll_thread_data *thread_data; struct ntdll_thread_data *parent_data = NULL; SIZE_T size; void *addr = NULL; NTSTATUS status; if (!sigstack_zero_bits) { size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 ); /* find the first power of two not smaller than min_size */ sigstack_zero_bits = 12; while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++; signal_stack_mask = (1 << sigstack_zero_bits) - 1; signal_stack_size = (1 << sigstack_zero_bits) - teb_size; } else parent_data = ntdll_get_thread_data(); size = signal_stack_mask + 1; if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), &addr, sigstack_zero_bits, &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE ))) { *teb = addr; (*teb)->Tib.Self = &(*teb)->Tib; (*teb)->Tib.ExceptionList = (void *)~0UL; thread_data = (struct ntdll_thread_data *)(*teb)->SpareBytes1; if (!(thread_data->fs = wine_ldt_alloc_fs())) { size = 0; NtFreeVirtualMemory( NtCurrentProcess(), &addr, &size, MEM_RELEASE ); status = STATUS_TOO_MANY_THREADS; } if (parent_data) { /* inherit debug registers from parent thread */ thread_data->dr0 = parent_data->dr0; thread_data->dr1 = parent_data->dr1; thread_data->dr2 = parent_data->dr2; thread_data->dr3 = parent_data->dr3; thread_data->dr6 = parent_data->dr6; thread_data->dr7 = parent_data->dr7; } } return status; } /********************************************************************** * signal_free_thread */ void signal_free_thread( TEB *teb ) { SIZE_T size; struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)teb->SpareBytes1; if (thread_data) wine_ldt_free_fs( thread_data->fs ); if (teb->DeallocationStack) { size = 0; NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE ); } size = 0; NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE ); } /********************************************************************** * signal_init_thread */ void signal_init_thread( TEB *teb ) { const WORD fpu_cw = 0x27f; struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)teb->SpareBytes1; LDT_ENTRY fs_entry; stack_t ss; #ifdef __APPLE__ int mib[2], val = 1; mib[0] = CTL_KERN; mib[1] = KERN_THALTSTACK; sysctl( mib, 2, NULL, NULL, &val, sizeof(val) ); #endif ss.ss_sp = (char *)teb + teb_size; ss.ss_size = signal_stack_size; ss.ss_flags = 0; if (sigaltstack(&ss, NULL) == -1) perror( "sigaltstack" ); wine_ldt_set_base( &fs_entry, teb ); wine_ldt_set_limit( &fs_entry, teb_size - 1 ); wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT ); wine_ldt_init_fs( thread_data->fs, &fs_entry ); thread_data->gs = wine_get_gs(); #ifdef __GNUC__ __asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw)); #else FIXME("FPU setup not implemented for this platform.\n"); #endif } /********************************************************************** * signal_init_process */ void signal_init_process(void) { struct sigaction sig_act; sig_act.sa_mask = server_block_set; sig_act.sa_flags = SA_SIGINFO | SA_RESTART; #ifdef SA_ONSTACK sig_act.sa_flags |= SA_ONSTACK; #endif sig_act.sa_sigaction = int_handler; if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = fpe_handler; if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = abrt_handler; if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = quit_handler; if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = usr1_handler; if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = segv_handler; if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error; if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error; #ifdef SIGBUS if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error; #endif #ifdef SIGTRAP sig_act.sa_sigaction = trap_handler; if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error; #endif #ifdef __HAVE_VM86 sig_act.sa_sigaction = usr2_handler; if (sigaction( SIGUSR2, &sig_act, NULL ) == -1) goto error; #endif wine_ldt_init_locking( ldt_lock, ldt_unlock ); return; error: perror("sigaction"); exit(1); } #ifdef __HAVE_VM86 /********************************************************************** * __wine_enter_vm86 (NTDLL.@) * * Enter vm86 mode with the specified register context. */ void __wine_enter_vm86( CONTEXT *context ) { EXCEPTION_RECORD rec; int res; struct vm86plus_struct vm86; memset( &vm86, 0, sizeof(vm86) ); for (;;) { restore_vm86_context( context, &vm86 ); ntdll_get_thread_data()->vm86_ptr = &vm86; merge_vm86_pending_flags( &rec ); res = vm86_enter( &ntdll_get_thread_data()->vm86_ptr ); /* uses and clears teb->vm86_ptr */ if (res < 0) { errno = -res; return; } save_vm86_context( context, &vm86 ); rec.ExceptionFlags = EXCEPTION_CONTINUABLE; rec.ExceptionRecord = NULL; rec.ExceptionAddress = (LPVOID)context->Eip; rec.NumberParameters = 0; switch(VM86_TYPE(res)) { case VM86_UNKNOWN: /* unhandled GP fault - IO-instruction or similar */ rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION; break; case VM86_TRAP: /* return due to DOS-debugger request */ switch(VM86_ARG(res)) { case TRAP_x86_TRCTRAP: /* Single-step exception */ rec.ExceptionCode = EXCEPTION_SINGLE_STEP; break; case TRAP_x86_BPTFLT: /* Breakpoint exception */ rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */ /* fall through */ default: rec.ExceptionCode = EXCEPTION_BREAKPOINT; break; } break; case VM86_INTx: /* int3/int x instruction (ARG = x) */ rec.ExceptionCode = EXCEPTION_VM86_INTx; rec.NumberParameters = 1; rec.ExceptionInformation[0] = VM86_ARG(res); break; case VM86_STI: /* sti/popf/iret instruction enabled virtual interrupts */ context->EFlags |= VIF_FLAG; context->EFlags &= ~VIP_FLAG; get_vm86_teb_info()->vm86_pending = 0; rec.ExceptionCode = EXCEPTION_VM86_STI; break; case VM86_PICRETURN: /* return due to pending PIC request */ rec.ExceptionCode = EXCEPTION_VM86_PICRETURN; break; case VM86_SIGNAL: /* cannot happen because vm86_enter handles this case */ default: WINE_ERR( "unhandled result from vm86 mode %x\n", res ); continue; } raise_exception( &rec, context, TRUE ); } } #else /* __HAVE_VM86 */ /********************************************************************** * __wine_enter_vm86 (NTDLL.@) */ void __wine_enter_vm86( CONTEXT *context ) { MESSAGE("vm86 mode not supported on this platform\n"); } #endif /* __HAVE_VM86 */ /******************************************************************* * RtlUnwind (NTDLL.@) */ void WINAPI __regs_RtlUnwind( EXCEPTION_REGISTRATION_RECORD* pEndFrame, PVOID targetIp, PEXCEPTION_RECORD pRecord, PVOID retval, CONTEXT *context ) { EXCEPTION_RECORD record; EXCEPTION_REGISTRATION_RECORD *frame, *dispatch; DWORD res; context->Eax = (DWORD)retval; /* build an exception record, if we do not have one */ if (!pRecord) { record.ExceptionCode = STATUS_UNWIND; record.ExceptionFlags = 0; record.ExceptionRecord = NULL; record.ExceptionAddress = (void *)context->Eip; record.NumberParameters = 0; pRecord = &record; } pRecord->ExceptionFlags |= EH_UNWINDING | (pEndFrame ? 0 : EH_EXIT_UNWIND); TRACE( "code=%x flags=%x\n", pRecord->ExceptionCode, pRecord->ExceptionFlags ); /* get chain of exception frames */ frame = NtCurrentTeb()->Tib.ExceptionList; while ((frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL) && (frame != pEndFrame)) { /* Check frame address */ if (pEndFrame && (frame > pEndFrame)) raise_status( STATUS_INVALID_UNWIND_TARGET, pRecord ); if (!is_valid_frame( frame )) raise_status( STATUS_BAD_STACK, pRecord ); /* Call handler */ TRACE( "calling handler at %p code=%x flags=%x\n", frame->Handler, pRecord->ExceptionCode, pRecord->ExceptionFlags ); res = EXC_CallHandler( pRecord, frame, context, &dispatch, frame->Handler, unwind_handler ); TRACE( "handler at %p returned %x\n", frame->Handler, res ); switch(res) { case ExceptionContinueSearch: break; case ExceptionCollidedUnwind: frame = dispatch; break; default: raise_status( STATUS_INVALID_DISPOSITION, pRecord ); break; } frame = __wine_pop_frame( frame ); } } DEFINE_REGS_ENTRYPOINT( RtlUnwind, 4 ) /******************************************************************* * NtRaiseException (NTDLL.@) */ NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance ) { NTSTATUS status = raise_exception( rec, context, first_chance ); if (status == STATUS_SUCCESS) { set_debug_registers( context ); set_cpu_context( context ); } return status; } /*********************************************************************** * RtlRaiseException (NTDLL.@) */ void WINAPI __regs_RtlRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context ) { NTSTATUS status; rec->ExceptionAddress = (void *)context->Eip; status = raise_exception( rec, context, TRUE ); if (status != STATUS_SUCCESS) raise_status( status, rec ); } DEFINE_REGS_ENTRYPOINT( RtlRaiseException, 1 ) /************************************************************************* * RtlCaptureStackBackTrace (NTDLL.@) */ USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) { CONTEXT context; ULONG i; ULONG *frame; RtlCaptureContext( &context ); if (hash) *hash = 0; frame = (ULONG *)context.Ebp; while (skip--) { if (!is_valid_frame( frame )) return 0; frame = (ULONG *)*frame; } for (i = 0; i < count; i++) { if (!is_valid_frame( frame )) break; buffer[i] = (void *)frame[1]; if (hash) *hash += frame[1]; frame = (ULONG *)*frame; } return i; } extern void DECLSPEC_NORETURN call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void *arg ); __ASM_GLOBAL_FUNC( call_thread_entry_point, "pushl %ebp\n\t" __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t") __ASM_CFI(".cfi_rel_offset %ebp,0\n\t") "movl %esp,%ebp\n\t" __ASM_CFI(".cfi_def_cfa_register %ebp\n\t") "pushl %ebx\n\t" __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t") "pushl %esi\n\t" __ASM_CFI(".cfi_rel_offset %esi,-8\n\t") "pushl %edi\n\t" __ASM_CFI(".cfi_rel_offset %edi,-12\n\t") "pushl %ebp\n\t" "pushl 12(%ebp)\n\t" "pushl 8(%ebp)\n\t" "call " __ASM_NAME("call_thread_func") ); extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), void *frame ); __ASM_GLOBAL_FUNC( call_thread_exit_func, "movl 4(%esp),%eax\n\t" "movl 8(%esp),%ecx\n\t" "movl 12(%esp),%ebp\n\t" __ASM_CFI(".cfi_def_cfa %ebp,4\n\t") __ASM_CFI(".cfi_rel_offset %ebp,0\n\t") __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t") __ASM_CFI(".cfi_rel_offset %esi,-8\n\t") __ASM_CFI(".cfi_rel_offset %edi,-12\n\t") "leal -20(%ebp),%esp\n\t" "pushl %eax\n\t" "call *%ecx" ); /* wrapper for apps that don't declare the thread function correctly */ extern void DECLSPEC_NORETURN call_thread_func_wrapper( LPTHREAD_START_ROUTINE entry, void *arg ); __ASM_GLOBAL_FUNC(call_thread_func_wrapper, "pushl %ebp\n\t" __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t") __ASM_CFI(".cfi_rel_offset %ebp,0\n\t") "movl %esp,%ebp\n\t" __ASM_CFI(".cfi_def_cfa_register %ebp\n\t") "subl $4,%esp\n\t" "pushl 12(%ebp)\n\t" "call *8(%ebp)\n\t" "leal -4(%ebp),%esp\n\t" "pushl %eax\n\t" "call " __ASM_NAME("exit_thread") "\n\t" "int $3" ) /*********************************************************************** * call_thread_func */ void call_thread_func( LPTHREAD_START_ROUTINE entry, void *arg, void *frame ) { ntdll_get_thread_data()->exit_frame = frame; __TRY { call_thread_func_wrapper( entry, arg ); } __EXCEPT(unhandled_exception_filter) { NtTerminateThread( GetCurrentThread(), GetExceptionCode() ); } __ENDTRY abort(); /* should not be reached */ } /*********************************************************************** * RtlExitUserThread (NTDLL.@) */ void WINAPI RtlExitUserThread( ULONG status ) { if (!ntdll_get_thread_data()->exit_frame) exit_thread( status ); call_thread_exit_func( status, exit_thread, ntdll_get_thread_data()->exit_frame ); } /*********************************************************************** * abort_thread */ void abort_thread( int status ) { if (!ntdll_get_thread_data()->exit_frame) terminate_thread( status ); call_thread_exit_func( status, terminate_thread, ntdll_get_thread_data()->exit_frame ); } /********************************************************************** * DbgBreakPoint (NTDLL.@) */ __ASM_STDCALL_FUNC( DbgBreakPoint, 0, "int $3; ret") /********************************************************************** * DbgUserBreakPoint (NTDLL.@) */ __ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "int $3; ret") /********************************************************************** * NtCurrentTeb (NTDLL.@) */ __ASM_STDCALL_FUNC( NtCurrentTeb, 0, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" ) /************************************************************************** * _chkstk (NTDLL.@) */ __ASM_STDCALL_FUNC( _chkstk, 0, "negl %eax\n\t" "addl %esp,%eax\n\t" "xchgl %esp,%eax\n\t" "movl 0(%eax),%eax\n\t" /* copy return address from old location */ "movl %eax,0(%esp)\n\t" "ret" ) /************************************************************************** * _alloca_probe (NTDLL.@) */ __ASM_STDCALL_FUNC( _alloca_probe, 0, "negl %eax\n\t" "addl %esp,%eax\n\t" "xchgl %esp,%eax\n\t" "movl 0(%eax),%eax\n\t" /* copy return address from old location */ "movl %eax,0(%esp)\n\t" "ret" ) /********************************************************************** * EXC_CallHandler (internal) * * Some exception handlers depend on EBP to have a fixed position relative to * the exception frame. * Shrinker depends on (*1) doing what it does, * (*2) being the exact instruction it is and (*3) beginning with 0x64 * (i.e. the %fs prefix to the movl instruction). It also depends on the * function calling the handler having only 5 parameters (*4). */ __ASM_GLOBAL_FUNC( EXC_CallHandler, "pushl %ebp\n\t" __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t") __ASM_CFI(".cfi_rel_offset %ebp,0\n\t") "movl %esp,%ebp\n\t" __ASM_CFI(".cfi_def_cfa_register %ebp\n\t") "pushl %ebx\n\t" __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t") "movl 28(%ebp), %edx\n\t" /* ugly hack to pass the 6th param needed because of Shrinker */ "pushl 24(%ebp)\n\t" "pushl 20(%ebp)\n\t" "pushl 16(%ebp)\n\t" "pushl 12(%ebp)\n\t" "pushl 8(%ebp)\n\t" "call " __ASM_NAME("call_exception_handler") "\n\t" "popl %ebx\n\t" __ASM_CFI(".cfi_same_value %ebx\n\t") "leave\n" __ASM_CFI(".cfi_def_cfa %esp,4\n\t") __ASM_CFI(".cfi_same_value %ebp\n\t") "ret" ) __ASM_GLOBAL_FUNC(call_exception_handler, "pushl %ebp\n\t" __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t") __ASM_CFI(".cfi_rel_offset %ebp,0\n\t") "movl %esp,%ebp\n\t" __ASM_CFI(".cfi_def_cfa_register %ebp\n\t") "subl $12,%esp\n\t" "pushl 12(%ebp)\n\t" /* make any exceptions in this... */ "pushl %edx\n\t" /* handler be handled by... */ ".byte 0x64\n\t" "pushl (0)\n\t" /* nested_handler (passed in edx). */ ".byte 0x64\n\t" "movl %esp,(0)\n\t" /* push the new exception frame onto the exception stack. */ "pushl 20(%ebp)\n\t" "pushl 16(%ebp)\n\t" "pushl 12(%ebp)\n\t" "pushl 8(%ebp)\n\t" "movl 24(%ebp), %ecx\n\t" /* (*1) */ "call *%ecx\n\t" /* call handler. (*2) */ ".byte 0x64\n\t" "movl (0), %esp\n\t" /* restore previous... (*3) */ ".byte 0x64\n\t" "popl (0)\n\t" /* exception frame. */ "movl %ebp, %esp\n\t" /* restore saved stack, in case it was corrupted */ "popl %ebp\n\t" __ASM_CFI(".cfi_def_cfa %esp,4\n\t") __ASM_CFI(".cfi_same_value %ebp\n\t") "ret $20" ) /* (*4) */ #endif /* __i386__ */