| /* |
| * 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 "windef.h" |
| #include "thread.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 */ |
| |
| /*********************************************************************** |
| * signal context platform-specific definitions |
| */ |
| |
| #ifdef 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 VM86_EAX 0 /* the %eax value while vm86_enter is executing */ |
| |
| int vm86_enter( void **vm86_ptr ); |
| void vm86_return(void); |
| void vm86_return_end(void); |
| __ASM_GLOBAL_FUNC(vm86_enter, |
| "pushl %ebp\n\t" |
| "movl %esp, %ebp\n\t" |
| "movl $166,%eax\n\t" /*SYS_vm86*/ |
| "movl 8(%ebp),%ecx\n\t" /* vm86_ptr */ |
| "movl (%ecx),%ecx\n\t" |
| "pushl %ebx\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" |
| "popl %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 |
| |
| #endif /* linux */ |
| |
| #ifdef 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)) |
| |
| #endif /* bsdi */ |
| |
| #if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || 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) |
| |
| #endif /* *BSD */ |
| |
| #if 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 |
| |
| #endif /* svr4 || SCO_DS */ |
| |
| #ifdef __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) |
| #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) |
| #endif |
| |
| #endif /* __APPLE__ */ |
| |
| WINE_DEFAULT_DEBUG_CHANNEL(seh); |
| |
| typedef int (*wine_signal_handler)(unsigned int sig); |
| |
| static size_t signal_stack_mask; |
| static size_t signal_stack_size; |
| |
| static wine_signal_handler handlers[256]; |
| |
| extern void DECLSPEC_NORETURN __wine_call_from_32_restore_regs( const CONTEXT *context ); |
| |
| enum i386_trap_code |
| { |
| TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */ |
| #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) |
| 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 |
| }; |
| |
| |
| /*********************************************************************** |
| * 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); |
| } |
| |
| |
| #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 && NtCurrentTeb()->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_MASK) |
| { |
| 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_MASK; |
| NtCurrentTeb()->vm86_pending = 0; |
| __regs_RtlRaiseException( rec, &vcontext ); |
| |
| 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 |= NtCurrentTeb()->vm86_pending; |
| } |
| #endif /* __HAVE_VM86 */ |
| |
| |
| typedef void (WINAPI *raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context ); |
| |
| |
| /*********************************************************************** |
| * init_handler |
| * |
| * Handler initialization when the full context is not needed. |
| */ |
| static inline void *init_handler( const SIGCONTEXT *sigcontext, WORD *fs, WORD *gs ) |
| { |
| void *stack = (void *)(ESP_sig(sigcontext) & ~3); |
| TEB *teb = get_current_teb(); |
| struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)teb->SystemReserved2; |
| |
| /* 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 |
| |
| wine_set_fs( thread_data->fs ); |
| |
| /* now restore a proper %gs for the fault handler */ |
| 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. |
| */ |
| wine_set_gs( thread_data->gs ); |
| stack = teb->WOW32Reserved; |
| } |
| #ifdef __HAVE_VM86 |
| else if ((void *)EIP_sig(sigcontext) == vm86_return) /* vm86 mode */ |
| { |
| unsigned int *int_stack = stack; |
| /* fetch the saved %gs from the stack */ |
| wine_set_gs( int_stack[0] ); |
| } |
| #endif |
| else /* 32-bit mode */ |
| { |
| #ifdef GS_sig |
| wine_set_gs( GS_sig(sigcontext) ); |
| #endif |
| } |
| return stack; |
| } |
| |
| |
| /*********************************************************************** |
| * 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 |
| } |
| |
| |
| /*********************************************************************** |
| * 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__ */ |
| } |
| |
| |
| /*********************************************************************** |
| * 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_regs * const regs = ntdll_get_thread_regs(); |
| |
| 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; |
| |
| #ifdef FPU_sig |
| if (FPU_sig(sigcontext)) |
| { |
| context->ContextFlags |= CONTEXT_FLOATING_POINT; |
| context->FloatSave = *FPU_sig(sigcontext); |
| } |
| else |
| #endif |
| { |
| 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_regs * const regs = ntdll_get_thread_regs(); |
| |
| 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 |
| |
| #ifdef FPU_sig |
| if (FPU_sig(sigcontext)) |
| { |
| *FPU_sig(sigcontext) = context->FloatSave; |
| } |
| else |
| #endif |
| { |
| restore_fpu( context ); |
| } |
| } |
| |
| |
| /*********************************************************************** |
| * get_cpu_context |
| * |
| * Register function to get the context of the current thread. |
| */ |
| void WINAPI __regs_get_cpu_context( CONTEXT *context, CONTEXT *regs ) |
| { |
| *context = *regs; |
| save_fpu( context ); |
| } |
| DEFINE_REGS_ENTRYPOINT( get_cpu_context, 4, 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_FLOATING_POINT) restore_fpu( context ); |
| |
| if (flags & CONTEXT_DEBUG_REGISTERS) |
| { |
| struct ntdll_thread_regs * const regs = ntdll_get_thread_regs(); |
| regs->dr0 = context->Dr0; |
| regs->dr1 = context->Dr1; |
| regs->dr2 = context->Dr2; |
| regs->dr3 = context->Dr3; |
| regs->dr6 = context->Dr6; |
| regs->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_call_from_32_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_call_from_32_restore_regs( &newcontext ); |
| } |
| } |
| } |
| |
| |
| /*********************************************************************** |
| * 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( CONTEXT86 *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 |
| * |
| * 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 ) |
| { |
| 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; |
| |
| WORD fs, gs; |
| |
| stack = init_handler( sigcontext, &fs, &gs ); |
| |
| /* 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 ); |
| server_abort_thread(1); |
| } |
| |
| if (stack - 1 > stack || /* check for overflow in subtraction */ |
| (char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit || |
| (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase) |
| { |
| UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)stack; |
| if (diff < 4096) |
| { |
| WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p\n", |
| diff, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext), |
| (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit, |
| NtCurrentTeb()->Tib.StackBase ); |
| server_abort_thread(1); |
| } |
| else 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 ); |
| } |
| |
| stack--; /* push the stack_layout structure */ |
| #ifdef HAVE_VALGRIND_MEMCHECK_H |
| 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.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 and align check flag */ |
| EFL_sig(sigcontext) &= ~(0x100|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; |
| } |
| |
| |
| /*********************************************************************** |
| * 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; |
| |
| 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 ) |
| { |
| 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; |
| rec->ExceptionCode = VIRTUAL_HandleFault( (void *)rec->ExceptionInformation[1] ); |
| } |
| 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; |
| } |
| __regs_RtlRaiseException( rec, context ); |
| done: |
| NtSetContextThread( GetCurrentThread(), context ); |
| } |
| |
| |
| /********************************************************************** |
| * raise_trap_exception |
| */ |
| static void WINAPI raise_trap_exception( EXCEPTION_RECORD *rec, CONTEXT *context ) |
| { |
| if (rec->ExceptionCode == EXCEPTION_SINGLE_STEP) |
| { |
| if (context->EFlags & 0x100) |
| { |
| context->EFlags &= ~0x100; /* clear single-step flag */ |
| } |
| else /* hardware breakpoint, fetch the debug registers */ |
| { |
| context->ContextFlags = CONTEXT_DEBUG_REGISTERS; |
| NtGetContextThread(GetCurrentThread(), context); |
| /* we have either: |
| * - a bp from a debug register |
| * - a single step interrupt at popf instruction, which just has |
| * removed the TF. |
| * - someone did a kill(SIGTRAP) on us, and we shall return |
| * a breakpoint, not a single step exception |
| */ |
| if ( !(context->Dr6 & 0xf) && !(context->Dr6 & 0x4000) ) |
| rec->ExceptionCode = EXCEPTION_BREAKPOINT; |
| context->ContextFlags |= CONTEXT_FULL; /* restore flags */ |
| } |
| } |
| |
| __regs_RtlRaiseException( rec, context ); |
| NtSetContextThread( GetCurrentThread(), context ); |
| } |
| |
| |
| /********************************************************************** |
| * raise_exception |
| * |
| * Generic raise function for exceptions that don't need special treatment. |
| */ |
| static void WINAPI raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context ) |
| { |
| __regs_RtlRaiseException( rec, context ); |
| NtSetContextThread( GetCurrentThread(), context ); |
| } |
| |
| |
| #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 */ |
| NtCurrentTeb()->vm86_pending |= VIP_MASK; |
| |
| 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 (NtCurrentTeb()->dpmi_vif && |
| !wine_ldt_is_system(context->SegCs) && |
| !wine_ldt_is_system(context->SegSs)) |
| { |
| /* Executing DPMI code and virtual interrupts are enabled. */ |
| NtCurrentTeb()->vm86_pending = 0; |
| __regs_RtlRaiseException( rec, context ); |
| } |
| done: |
| NtSetContextThread( GetCurrentThread(), context ); |
| } |
| |
| |
| /********************************************************************** |
| * usr2_handler |
| * |
| * Handler for SIGUSR2. |
| * We use it to signal that the running __wine_enter_vm86() should |
| * immediately set VIP_MASK, 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 ) |
| { |
| SIGCONTEXT *context = sigcontext; |
| EXCEPTION_RECORD *rec = setup_exception( context, raise_segv_exception ); |
| |
| 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_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 ); |
| 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 thats 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_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_exception ); |
| rec->ExceptionCode = EXCEPTION_WINE_ASSERTION; |
| rec->ExceptionFlags = EH_NONCONTINUABLE; |
| } |
| |
| |
| /********************************************************************** |
| * term_handler |
| * |
| * Handler for SIGTERM. |
| */ |
| static void term_handler( int signal, siginfo_t *siginfo, void *sigcontext ) |
| { |
| WORD fs, gs; |
| init_handler( sigcontext, &fs, &gs ); |
| server_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 ); |
| } |
| |
| |
| /********************************************************************** |
| * get_signal_stack_total_size |
| * |
| * Retrieve the size to allocate for the signal stack, including the TEB at the bottom. |
| * Must be a power of two. |
| */ |
| size_t get_signal_stack_total_size(void) |
| { |
| static const size_t teb_size = 4096; /* we reserve one page for the TEB */ |
| |
| if (!signal_stack_size) |
| { |
| size_t size = 4096, min_size = teb_size + max( MINSIGSTKSZ, 4096 ); |
| /* find the first power of two not smaller than min_size */ |
| while (size < min_size) size *= 2; |
| signal_stack_mask = size - 1; |
| signal_stack_size = size - teb_size; |
| } |
| return signal_stack_size + teb_size; |
| } |
| |
| |
| /*********************************************************************** |
| * __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) |
| { |
| struct sigaction sig_act; |
| |
| #ifdef HAVE_SIGALTSTACK |
| 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 = get_signal_stack(); |
| ss.ss_size = signal_stack_size; |
| ss.ss_flags = 0; |
| if (sigaltstack(&ss, NULL) == -1) |
| { |
| perror( "sigaltstack" ); |
| return FALSE; |
| } |
| #endif /* HAVE_SIGALTSTACK */ |
| |
| 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 = term_handler; |
| if (sigaction( SIGTERM, &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 |
| |
| return TRUE; |
| |
| error: |
| perror("sigaction"); |
| return FALSE; |
| } |
| |
| |
| #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_MASK; |
| context->EFlags &= ~VIP_MASK; |
| NtCurrentTeb()->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; |
| } |
| __regs_RtlRaiseException( &rec, context ); |
| } |
| } |
| |
| #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 */ |
| |
| /********************************************************************** |
| * DbgBreakPoint (NTDLL.@) |
| */ |
| __ASM_GLOBAL_FUNC( DbgBreakPoint, "int $3; ret") |
| |
| /********************************************************************** |
| * DbgUserBreakPoint (NTDLL.@) |
| */ |
| __ASM_GLOBAL_FUNC( DbgUserBreakPoint, "int $3; 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" |
| " movl %esp, %ebp\n" |
| " pushl %ebx\n" |
| " movl 28(%ebp), %edx\n" /* ugly hack to pass the 6th param needed because of Shrinker */ |
| " pushl 24(%ebp)\n" |
| " pushl 20(%ebp)\n" |
| " pushl 16(%ebp)\n" |
| " pushl 12(%ebp)\n" |
| " pushl 8(%ebp)\n" |
| " call " __ASM_NAME("call_exception_handler") "\n" |
| " popl %ebx\n" |
| " leave\n" |
| " ret\n" |
| ) |
| __ASM_GLOBAL_FUNC(call_exception_handler, |
| " pushl %ebp\n" |
| " movl %esp, %ebp\n" |
| " subl $12,%esp\n" |
| " pushl 12(%ebp)\n" /* make any exceptions in this... */ |
| " pushl %edx\n" /* handler be handled by... */ |
| " .byte 0x64\n" |
| " pushl (0)\n" /* nested_handler (passed in edx). */ |
| " .byte 0x64\n" |
| " movl %esp,(0)\n" /* push the new exception frame onto the exception stack. */ |
| " pushl 20(%ebp)\n" |
| " pushl 16(%ebp)\n" |
| " pushl 12(%ebp)\n" |
| " pushl 8(%ebp)\n" |
| " movl 24(%ebp), %ecx\n" /* (*1) */ |
| " call *%ecx\n" /* call handler. (*2) */ |
| " .byte 0x64\n" |
| " movl (0), %esp\n" /* restore previous... (*3) */ |
| " .byte 0x64\n" |
| " popl (0)\n" /* exception frame. */ |
| " movl %ebp, %esp\n" /* restore saved stack, in case it was corrupted */ |
| " popl %ebp\n" |
| " ret $20\n" /* (*4) */ |
| ) |
| #endif /* __i386__ */ |
