/* * x86-64 signal handling routines * * Copyright 1999, 2005 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 __x86_64__ #include "config.h" #include "wine/port.h" #include <assert.h> #include <signal.h> #include <stdlib.h> #include <stdarg.h> #include <stdio.h> #ifdef HAVE_UNISTD_H # include <unistd.h> #endif #ifdef HAVE_SYS_PARAM_H # include <sys/param.h> #endif #ifdef HAVE_SYS_SIGNAL_H # include <sys/signal.h> #endif #define NONAMELESSUNION #define NONAMELESSSTRUCT #include "ntstatus.h" #define WIN32_NO_STATUS #include "windef.h" #include "winternl.h" #include "wine/library.h" #include "wine/exception.h" #include "ntdll_misc.h" #include "wine/debug.h" WINE_DEFAULT_DEBUG_CHANNEL(seh); struct _DISPATCHER_CONTEXT; typedef LONG (WINAPI *PC_LANGUAGE_EXCEPTION_HANDLER)( EXCEPTION_POINTERS *ptrs, ULONG64 frame ); typedef EXCEPTION_DISPOSITION (WINAPI *PEXCEPTION_ROUTINE)( EXCEPTION_RECORD *rec, ULONG64 frame, CONTEXT *context, struct _DISPATCHER_CONTEXT *dispatch ); typedef struct _DISPATCHER_CONTEXT { ULONG64 ControlPc; ULONG64 ImageBase; PRUNTIME_FUNCTION FunctionEntry; ULONG64 EstablisherFrame; ULONG64 TargetIp; PCONTEXT ContextRecord; PEXCEPTION_ROUTINE LanguageHandler; PVOID HandlerData; PUNWIND_HISTORY_TABLE HistoryTable; ULONG ScopeIndex; } DISPATCHER_CONTEXT, *PDISPATCHER_CONTEXT; typedef struct _SCOPE_TABLE { ULONG Count; struct { ULONG BeginAddress; ULONG EndAddress; ULONG HandlerAddress; ULONG JumpTarget; } ScopeRecord[1]; } SCOPE_TABLE, *PSCOPE_TABLE; /*********************************************************************** * signal context platform-specific definitions */ #ifdef linux #include <asm/prctl.h> extern int arch_prctl(int func, void *ptr); #define RAX_sig(context) ((context)->uc_mcontext.gregs[REG_RAX]) #define RBX_sig(context) ((context)->uc_mcontext.gregs[REG_RBX]) #define RCX_sig(context) ((context)->uc_mcontext.gregs[REG_RCX]) #define RDX_sig(context) ((context)->uc_mcontext.gregs[REG_RDX]) #define RSI_sig(context) ((context)->uc_mcontext.gregs[REG_RSI]) #define RDI_sig(context) ((context)->uc_mcontext.gregs[REG_RDI]) #define RBP_sig(context) ((context)->uc_mcontext.gregs[REG_RBP]) #define R8_sig(context) ((context)->uc_mcontext.gregs[REG_R8]) #define R9_sig(context) ((context)->uc_mcontext.gregs[REG_R9]) #define R10_sig(context) ((context)->uc_mcontext.gregs[REG_R10]) #define R11_sig(context) ((context)->uc_mcontext.gregs[REG_R11]) #define R12_sig(context) ((context)->uc_mcontext.gregs[REG_R12]) #define R13_sig(context) ((context)->uc_mcontext.gregs[REG_R13]) #define R14_sig(context) ((context)->uc_mcontext.gregs[REG_R14]) #define R15_sig(context) ((context)->uc_mcontext.gregs[REG_R15]) #define CS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 0)) #define GS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 1)) #define FS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 2)) #define RSP_sig(context) ((context)->uc_mcontext.gregs[REG_RSP]) #define RIP_sig(context) ((context)->uc_mcontext.gregs[REG_RIP]) #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL]) #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO]) #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR]) #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.fpregs)) #endif /* linux */ #if defined(__NetBSD__) # include <sys/ucontext.h> # include <sys/types.h> # include <signal.h> #define RAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RAX]) #define RBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBX]) #define RCX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RCX]) #define RDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDX]) #define RSI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RSI]) #define RDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDI]) #define RBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBP]) #define R8_sig(context) ((context)->uc_mcontext.__gregs[_REG_R8]) #define R9_sig(context) ((context)->uc_mcontext.__gregs[_REG_R9]) #define R10_sig(context) ((context)->uc_mcontext.__gregs[_REG_R10]) #define R11_sig(context) ((context)->uc_mcontext.__gregs[_REG_R11]) #define R12_sig(context) ((context)->uc_mcontext.__gregs[_REG_R12]) #define R13_sig(context) ((context)->uc_mcontext.__gregs[_REG_R13]) #define R14_sig(context) ((context)->uc_mcontext.__gregs[_REG_R14]) #define R15_sig(context) ((context)->uc_mcontext.__gregs[_REG_R15]) #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 FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS]) #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS]) #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS]) #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_RFL]) #define RIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_RIP])) #define RSP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_URSP])) #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO]) #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR]) #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.__fpregs)) #endif /* __NetBSD__ */ enum i386_trap_code { TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */ 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 /* Cache flush exception */ }; typedef int (*wine_signal_handler)(unsigned int sig); static wine_signal_handler handlers[256]; /* definitions for unwind tables */ union handler_data { RUNTIME_FUNCTION chain; ULONG handler; }; struct opcode { BYTE offset; BYTE code : 4; BYTE info : 4; }; struct UNWIND_INFO { BYTE version : 3; BYTE flags : 5; BYTE prolog; BYTE count; BYTE frame_reg : 4; BYTE frame_offset : 4; struct opcode opcodes[1]; /* info->count entries */ /* followed by handler_data */ }; #define UWOP_PUSH_NONVOL 0 #define UWOP_ALLOC_LARGE 1 #define UWOP_ALLOC_SMALL 2 #define UWOP_SET_FPREG 3 #define UWOP_SAVE_NONVOL 4 #define UWOP_SAVE_NONVOL_FAR 5 #define UWOP_SAVE_XMM128 8 #define UWOP_SAVE_XMM128_FAR 9 #define UWOP_PUSH_MACHFRAME 10 static void dump_unwind_info( ULONG64 base, RUNTIME_FUNCTION *function ) { static const char * const reg_names[16] = { "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" }; union handler_data *handler_data; struct UNWIND_INFO *info; unsigned int i, count; TRACE( "**** func %x-%x\n", function->BeginAddress, function->EndAddress ); for (;;) { if (function->UnwindData & 1) { RUNTIME_FUNCTION *next = (RUNTIME_FUNCTION *)((char *)base + (function->UnwindData & ~1)); TRACE( "unwind info for function %p-%p chained to function %p-%p\n", (char *)base + function->BeginAddress, (char *)base + function->EndAddress, (char *)base + next->BeginAddress, (char *)base + next->EndAddress ); function = next; continue; } info = (struct UNWIND_INFO *)((char *)base + function->UnwindData); TRACE( "unwind info at %p flags %x prolog 0x%x bytes function %p-%p\n", info, info->flags, info->prolog, (char *)base + function->BeginAddress, (char *)base + function->EndAddress ); if (info->frame_reg) TRACE( " frame register %s offset 0x%x(%%rsp)\n", reg_names[info->frame_reg], info->frame_offset * 16 ); for (i = 0; i < info->count; i++) { TRACE( " 0x%x: ", info->opcodes[i].offset ); switch (info->opcodes[i].code) { case UWOP_PUSH_NONVOL: TRACE( "pushq %%%s\n", reg_names[info->opcodes[i].info] ); break; case UWOP_ALLOC_LARGE: if (info->opcodes[i].info) { count = *(DWORD *)&info->opcodes[i+1]; i += 2; } else { count = *(USHORT *)&info->opcodes[i+1] * 8; i++; } TRACE( "subq $0x%x,%%rsp\n", count ); break; case UWOP_ALLOC_SMALL: count = (info->opcodes[i].info + 1) * 8; TRACE( "subq $0x%x,%%rsp\n", count ); break; case UWOP_SET_FPREG: TRACE( "leaq 0x%x(%%rsp),%s\n", info->frame_offset * 16, reg_names[info->frame_reg] ); break; case UWOP_SAVE_NONVOL: count = *(USHORT *)&info->opcodes[i+1] * 8; TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count ); i++; break; case UWOP_SAVE_NONVOL_FAR: count = *(DWORD *)&info->opcodes[i+1]; TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count ); i += 2; break; case UWOP_SAVE_XMM128: count = *(USHORT *)&info->opcodes[i+1] * 16; TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count ); i++; break; case UWOP_SAVE_XMM128_FAR: count = *(DWORD *)&info->opcodes[i+1]; TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count ); i += 2; break; case UWOP_PUSH_MACHFRAME: TRACE( "PUSH_MACHFRAME %u\n", info->opcodes[i].info ); break; default: FIXME( "unknown code %u\n", info->opcodes[i].code ); break; } } handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1]; if (info->flags & UNW_FLAG_CHAININFO) { TRACE( " chained to function %p-%p\n", (char *)base + handler_data->chain.BeginAddress, (char *)base + handler_data->chain.EndAddress ); function = &handler_data->chain; continue; } if (info->flags & (UNW_FLAG_EHANDLER | UNW_FLAG_UHANDLER)) TRACE( " handler %p data at %p\n", (char *)base + handler_data->handler, &handler_data->handler + 1 ); break; } } static void dump_scope_table( ULONG64 base, const SCOPE_TABLE *table ) { unsigned int i; TRACE( "scope table at %p\n", table ); for (i = 0; i < table->Count; i++) TRACE( " %u: %lx-%lx handler %lx target %lx\n", i, base + table->ScopeRecord[i].BeginAddress, base + table->ScopeRecord[i].EndAddress, base + table->ScopeRecord[i].HandlerAddress, base + table->ScopeRecord[i].JumpTarget ); } /*********************************************************************** * dispatch_signal */ static inline int dispatch_signal(unsigned int sig) { if (handlers[sig] == NULL) return 0; return handlers[sig](sig); } /*********************************************************************** * save_context * * Set the register values from a sigcontext. */ static void save_context( CONTEXT *context, const ucontext_t *sigcontext ) { context->ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_SEGMENTS; context->Rax = RAX_sig(sigcontext); context->Rcx = RCX_sig(sigcontext); context->Rdx = RDX_sig(sigcontext); context->Rbx = RBX_sig(sigcontext); context->Rsp = RSP_sig(sigcontext); context->Rbp = RBP_sig(sigcontext); context->Rsi = RSI_sig(sigcontext); context->Rdi = RDI_sig(sigcontext); context->R8 = R8_sig(sigcontext); context->R9 = R9_sig(sigcontext); context->R10 = R10_sig(sigcontext); context->R11 = R11_sig(sigcontext); context->R12 = R12_sig(sigcontext); context->R13 = R13_sig(sigcontext); context->R14 = R14_sig(sigcontext); context->R15 = R15_sig(sigcontext); context->Rip = RIP_sig(sigcontext); context->SegCs = CS_sig(sigcontext); context->SegFs = FS_sig(sigcontext); context->SegGs = GS_sig(sigcontext); context->EFlags = EFL_sig(sigcontext); #ifdef DS_sig context->SegDs = DS_sig(sigcontext); #else __asm__("movw %%ds,%0" : "=m" (context->SegDs)); #endif #ifdef ES_sig context->SegEs = ES_sig(sigcontext); #else __asm__("movw %%es,%0" : "=m" (context->SegEs)); #endif #ifdef SS_sig context->SegSs = SS_sig(sigcontext); #else __asm__("movw %%ss,%0" : "=m" (context->SegSs)); #endif context->MxCsr = 0; /* FIXME */ if (FPU_sig(sigcontext)) { context->ContextFlags |= CONTEXT_FLOATING_POINT; context->u.FltSave = *FPU_sig(sigcontext); } } /*********************************************************************** * restore_context * * Build a sigcontext from the register values. */ static void restore_context( const CONTEXT *context, ucontext_t *sigcontext ) { RAX_sig(sigcontext) = context->Rax; RCX_sig(sigcontext) = context->Rcx; RDX_sig(sigcontext) = context->Rdx; RBX_sig(sigcontext) = context->Rbx; RSP_sig(sigcontext) = context->Rsp; RBP_sig(sigcontext) = context->Rbp; RSI_sig(sigcontext) = context->Rsi; RDI_sig(sigcontext) = context->Rdi; R8_sig(sigcontext) = context->R8; R9_sig(sigcontext) = context->R9; R10_sig(sigcontext) = context->R10; R11_sig(sigcontext) = context->R11; R12_sig(sigcontext) = context->R12; R13_sig(sigcontext) = context->R13; R14_sig(sigcontext) = context->R14; R15_sig(sigcontext) = context->R15; RIP_sig(sigcontext) = context->Rip; CS_sig(sigcontext) = context->SegCs; FS_sig(sigcontext) = context->SegFs; GS_sig(sigcontext) = context->SegGs; EFL_sig(sigcontext) = context->EFlags; #ifdef DS_sig DS_sig(sigcontext) = context->SegDs; #endif #ifdef ES_sig ES_sig(sigcontext) = context->SegEs; #endif #ifdef SS_sig SS_sig(sigcontext) = context->SegSs; #endif if (FPU_sig(sigcontext)) *FPU_sig(sigcontext) = context->u.FltSave; } /*********************************************************************** * RtlCaptureContext (NTDLL.@) */ void WINAPI __regs_RtlCaptureContext( CONTEXT *context, CONTEXT *regs ) { *context = *regs; } DEFINE_REGS_ENTRYPOINT( RtlCaptureContext, 1 ) /*********************************************************************** * set_cpu_context * * Set the new CPU context. */ void set_cpu_context( const CONTEXT *context ) { extern void CDECL __wine_restore_regs( const CONTEXT * ) DECLSPEC_NORETURN; __wine_restore_regs( context ); } /*********************************************************************** * copy_context * * Copy a register context according to the flags. */ void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags ) { flags &= ~CONTEXT_AMD64; /* get rid of CPU id */ if (flags & CONTEXT_CONTROL) { to->Rbp = from->Rbp; to->Rip = from->Rip; to->Rsp = from->Rsp; to->SegCs = from->SegCs; to->SegSs = from->SegSs; to->EFlags = from->EFlags; to->MxCsr = from->MxCsr; } if (flags & CONTEXT_INTEGER) { to->Rax = from->Rax; to->Rcx = from->Rcx; to->Rdx = from->Rdx; to->Rbx = from->Rbx; to->Rsi = from->Rsi; to->Rdi = from->Rdi; to->R8 = from->R8; to->R9 = from->R9; to->R10 = from->R10; to->R11 = from->R11; to->R12 = from->R12; to->R13 = from->R13; to->R14 = from->R14; to->R15 = from->R15; } if (flags & CONTEXT_SEGMENTS) { to->SegDs = from->SegDs; to->SegEs = from->SegEs; to->SegFs = from->SegFs; to->SegGs = from->SegGs; } if (flags & CONTEXT_FLOATING_POINT) { to->u.FltSave = from->u.FltSave; } 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; } } /*********************************************************************** * 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_AMD64; /* get rid of CPU id */ memset( to, 0, sizeof(*to) ); to->cpu = CPU_x86_64; if (flags & CONTEXT_CONTROL) { to->flags |= SERVER_CTX_CONTROL; to->ctl.x86_64_regs.rbp = from->Rbp; to->ctl.x86_64_regs.rip = from->Rip; to->ctl.x86_64_regs.rsp = from->Rsp; to->ctl.x86_64_regs.cs = from->SegCs; to->ctl.x86_64_regs.ss = from->SegSs; to->ctl.x86_64_regs.flags = from->EFlags; to->ctl.x86_64_regs.mxcsr = from->MxCsr; } if (flags & CONTEXT_INTEGER) { to->flags |= SERVER_CTX_INTEGER; to->integer.x86_64_regs.rax = from->Rax; to->integer.x86_64_regs.rcx = from->Rcx; to->integer.x86_64_regs.rdx = from->Rdx; to->integer.x86_64_regs.rbx = from->Rbx; to->integer.x86_64_regs.rsi = from->Rsi; to->integer.x86_64_regs.rdi = from->Rdi; to->integer.x86_64_regs.r8 = from->R8; to->integer.x86_64_regs.r9 = from->R9; to->integer.x86_64_regs.r10 = from->R10; to->integer.x86_64_regs.r11 = from->R11; to->integer.x86_64_regs.r12 = from->R12; to->integer.x86_64_regs.r13 = from->R13; to->integer.x86_64_regs.r14 = from->R14; to->integer.x86_64_regs.r15 = from->R15; } if (flags & CONTEXT_SEGMENTS) { to->flags |= SERVER_CTX_SEGMENTS; to->seg.x86_64_regs.ds = from->SegDs; to->seg.x86_64_regs.es = from->SegEs; to->seg.x86_64_regs.fs = from->SegFs; to->seg.x86_64_regs.gs = from->SegGs; } if (flags & CONTEXT_FLOATING_POINT) { to->flags |= SERVER_CTX_FLOATING_POINT; memcpy( to->fp.x86_64_regs.fpregs, &from->u.FltSave, sizeof(to->fp.x86_64_regs.fpregs) ); } if (flags & CONTEXT_DEBUG_REGISTERS) { to->flags |= SERVER_CTX_DEBUG_REGISTERS; to->debug.x86_64_regs.dr0 = from->Dr0; to->debug.x86_64_regs.dr1 = from->Dr1; to->debug.x86_64_regs.dr2 = from->Dr2; to->debug.x86_64_regs.dr3 = from->Dr3; to->debug.x86_64_regs.dr6 = from->Dr6; to->debug.x86_64_regs.dr7 = from->Dr7; } 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_64) return STATUS_INVALID_PARAMETER; to->ContextFlags = CONTEXT_AMD64; if (from->flags & SERVER_CTX_CONTROL) { to->ContextFlags |= CONTEXT_CONTROL; to->Rbp = from->ctl.x86_64_regs.rbp; to->Rip = from->ctl.x86_64_regs.rip; to->Rsp = from->ctl.x86_64_regs.rsp; to->SegCs = from->ctl.x86_64_regs.cs; to->SegSs = from->ctl.x86_64_regs.ss; to->EFlags = from->ctl.x86_64_regs.flags; to->MxCsr = from->ctl.x86_64_regs.mxcsr; } if (from->flags & SERVER_CTX_INTEGER) { to->ContextFlags |= CONTEXT_INTEGER; to->Rax = from->integer.x86_64_regs.rax; to->Rcx = from->integer.x86_64_regs.rcx; to->Rdx = from->integer.x86_64_regs.rdx; to->Rbx = from->integer.x86_64_regs.rbx; to->Rsi = from->integer.x86_64_regs.rsi; to->Rdi = from->integer.x86_64_regs.rdi; to->R8 = from->integer.x86_64_regs.r8; to->R9 = from->integer.x86_64_regs.r9; to->R10 = from->integer.x86_64_regs.r10; to->R11 = from->integer.x86_64_regs.r11; to->R12 = from->integer.x86_64_regs.r12; to->R13 = from->integer.x86_64_regs.r13; to->R14 = from->integer.x86_64_regs.r14; to->R15 = from->integer.x86_64_regs.r15; } if (from->flags & SERVER_CTX_SEGMENTS) { to->ContextFlags |= CONTEXT_SEGMENTS; to->SegDs = from->seg.x86_64_regs.ds; to->SegEs = from->seg.x86_64_regs.es; to->SegFs = from->seg.x86_64_regs.fs; to->SegGs = from->seg.x86_64_regs.gs; } if (from->flags & SERVER_CTX_FLOATING_POINT) { to->ContextFlags |= CONTEXT_FLOATING_POINT; memcpy( &to->u.FltSave, from->fp.x86_64_regs.fpregs, sizeof(from->fp.x86_64_regs.fpregs) ); } if (from->flags & SERVER_CTX_DEBUG_REGISTERS) { to->ContextFlags |= CONTEXT_DEBUG_REGISTERS; to->Dr0 = from->debug.x86_64_regs.dr0; to->Dr1 = from->debug.x86_64_regs.dr1; to->Dr2 = from->debug.x86_64_regs.dr2; to->Dr3 = from->debug.x86_64_regs.dr3; to->Dr6 = from->debug.x86_64_regs.dr6; to->Dr7 = from->debug.x86_64_regs.dr7; } return STATUS_SUCCESS; } /********************************************************************** * find_function_info */ static RUNTIME_FUNCTION *find_function_info( ULONG64 pc, HMODULE module, RUNTIME_FUNCTION *func, ULONG size ) { int min = 0; int max = size/sizeof(*func) - 1; while (min <= max) { int pos = (min + max) / 2; if ((char *)pc < (char *)module + func[pos].BeginAddress) max = pos - 1; else if ((char *)pc >= (char *)module + func[pos].EndAddress) min = pos + 1; else { func += pos; while (func->UnwindData & 1) /* follow chained entry */ func = (RUNTIME_FUNCTION *)((char *)module + (func->UnwindData & ~1)); return func; } } return NULL; } /********************************************************************** * call_stack_handlers * * Call the stack handlers chain. */ static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *orig_context ) { EXCEPTION_POINTERS ptrs; UNWIND_HISTORY_TABLE table; ULONG64 frame; RUNTIME_FUNCTION *dir, *info; PEXCEPTION_ROUTINE handler; DISPATCHER_CONTEXT dispatch; CONTEXT context, new_context; LDR_MODULE *module; DWORD size; context = *orig_context; for (;;) { /* FIXME: should use the history table to make things faster */ if (LdrFindEntryForAddress( (void *)context.Rip, &module )) { ERR( "no module found for rip %p, can't dispatch exception\n", (void *)context.Rip ); break; } if (!(dir = RtlImageDirectoryEntryToData( module->BaseAddress, TRUE, IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size ))) { ERR( "module %s doesn't contain exception data, can't dispatch exception\n", debugstr_w(module->BaseDllName.Buffer) ); break; } if (!(info = find_function_info( context.Rip, module->BaseAddress, dir, size ))) { /* leaf function */ context.Rip = *(ULONG64 *)context.Rsp; context.Rsp += sizeof(ULONG64); continue; } new_context = context; handler = RtlVirtualUnwind( UNW_FLAG_EHANDLER, (ULONG64)module->BaseAddress, context.Rip, info, &new_context, &dispatch.HandlerData, &frame, NULL ); if ((frame & 7) || frame < (ULONG64)NtCurrentTeb()->Tib.StackLimit || frame >= (ULONG64)NtCurrentTeb()->Tib.StackBase) { ERR( "invalid frame %lx\n", frame ); rec->ExceptionFlags |= EH_STACK_INVALID; break; } if (handler) { dispatch.ControlPc = context.Rip; dispatch.ImageBase = (ULONG64)module->BaseAddress; dispatch.FunctionEntry = info; dispatch.EstablisherFrame = frame; dispatch.TargetIp = 0; /* FIXME */ dispatch.ContextRecord = &context; dispatch.LanguageHandler = handler; dispatch.HistoryTable = &table; dispatch.ScopeIndex = 0; /* FIXME */ TRACE( "calling handler %p (rec=%p, frame=%lx context=%p, dispatch=%p)\n", handler, rec, frame, &context, &dispatch ); switch( handler( rec, frame, &context, &dispatch )) { case ExceptionContinueExecution: if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION; *orig_context = context; return STATUS_SUCCESS; case ExceptionContinueSearch: break; case ExceptionNestedException: break; default: return STATUS_INVALID_DISPOSITION; } } context = new_context; } /* hack: call unhandled exception filter directly */ ptrs.ExceptionRecord = rec; ptrs.ContextRecord = orig_context; unhandled_exception_filter( &ptrs ); 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=%lx tid=%04x\n", rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress, context->Rip, GetCurrentThreadId() ); for (c = 0; c < min( EXCEPTION_MAXIMUM_PARAMETERS, 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(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n", context->Rax, context->Rbx, context->Rcx, context->Rdx ); TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n", context->Rsi, context->Rdi, context->Rbp, context->Rsp ); TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n", context->R8, context->R9, context->R10, context->R11 ); TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n", context->R12, context->R13, context->R14, context->R15 ); } status = send_debug_event( rec, TRUE, context ); if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED) return STATUS_SUCCESS; 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) ERR("Exception frame is not in stack limits => unable to dispatch exception.\n"); else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION) ERR("Process attempted to continue execution after noncontinuable exception.\n"); else ERR("Unhandled exception code %x flags %x addr %p\n", rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress ); NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode ); } return STATUS_SUCCESS; } /********************************************************************** * segv_handler * * Handler for SIGSEGV and related errors. */ static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD rec; CONTEXT context; NTSTATUS status; ucontext_t *ucontext = sigcontext; save_context( &context, ucontext ); rec.ExceptionRecord = NULL; rec.ExceptionFlags = EXCEPTION_CONTINUABLE; rec.ExceptionAddress = (LPVOID)context.Rip; rec.NumberParameters = 0; switch(TRAP_sig(ucontext)) { 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 */ rec.ExceptionCode = ERROR_sig(ucontext) ? EXCEPTION_ACCESS_VIOLATION : EXCEPTION_PRIV_INSTRUCTION; break; case TRAP_x86_PAGEFLT: /* Page fault */ rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION; rec.NumberParameters = 2; rec.ExceptionInformation[0] = (ERROR_sig(ucontext) & 2) != 0; rec.ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr; if (!(rec.ExceptionCode = virtual_handle_fault( siginfo->si_addr, rec.ExceptionInformation[0] ))) goto done; break; case TRAP_x86_ALIGNFLT: /* Alignment check exception */ rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT; break; default: ERR( "Got unexpected trap %ld\n", TRAP_sig(ucontext) ); /* 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; } status = raise_exception( &rec, &context, TRUE ); if (status) raise_status( status, &rec ); done: restore_context( &context, ucontext ); } /********************************************************************** * trap_handler * * Handler for SIGTRAP. */ static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD rec; CONTEXT context; NTSTATUS status; ucontext_t *ucontext = sigcontext; save_context( &context, ucontext ); rec.ExceptionFlags = EXCEPTION_CONTINUABLE; rec.ExceptionRecord = NULL; rec.ExceptionAddress = (LPVOID)context.Rip; rec.NumberParameters = 0; switch (siginfo->si_code) { case TRAP_TRACE: /* Single-step exception */ rec.ExceptionCode = EXCEPTION_SINGLE_STEP; EFL_sig(ucontext) &= ~0x100; /* clear single-step flag */ break; case TRAP_BRKPT: /* Breakpoint exception */ rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */ /* fall through */ default: rec.ExceptionCode = EXCEPTION_BREAKPOINT; break; } status = raise_exception( &rec, &context, TRUE ); if (status) raise_status( status, &rec ); restore_context( &context, ucontext ); } /********************************************************************** * fpe_handler * * Handler for SIGFPE. */ static void fpe_handler( int signal, siginfo_t *siginfo, void *ucontext ) { EXCEPTION_RECORD rec; CONTEXT context; NTSTATUS status; save_context( &context, ucontext ); rec.ExceptionFlags = EXCEPTION_CONTINUABLE; rec.ExceptionRecord = NULL; rec.ExceptionAddress = (LPVOID)context.Rip; rec.NumberParameters = 0; switch (siginfo->si_code) { case FPE_FLTSUB: rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED; break; case FPE_INTDIV: rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO; break; case FPE_INTOVF: rec.ExceptionCode = EXCEPTION_INT_OVERFLOW; break; case FPE_FLTDIV: rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO; break; case FPE_FLTOVF: rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW; break; case FPE_FLTUND: rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW; break; case FPE_FLTRES: rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT; break; case FPE_FLTINV: default: rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION; break; } status = raise_exception( &rec, &context, TRUE ); if (status) raise_status( status, &rec ); restore_context( &context, ucontext ); } /********************************************************************** * int_handler * * Handler for SIGINT. */ static void int_handler( int signal, siginfo_t *siginfo, void *ucontext ) { if (!dispatch_signal(SIGINT)) { EXCEPTION_RECORD rec; CONTEXT context; NTSTATUS status; save_context( &context, ucontext ); rec.ExceptionCode = CONTROL_C_EXIT; rec.ExceptionFlags = EXCEPTION_CONTINUABLE; rec.ExceptionRecord = NULL; rec.ExceptionAddress = (LPVOID)context.Rip; rec.NumberParameters = 0; status = raise_exception( &rec, &context, TRUE ); if (status) raise_status( status, &rec ); restore_context( &context, ucontext ); } } /********************************************************************** * abrt_handler * * Handler for SIGABRT. */ static void abrt_handler( int signal, siginfo_t *siginfo, void *ucontext ) { EXCEPTION_RECORD rec; CONTEXT context; NTSTATUS status; save_context( &context, ucontext ); rec.ExceptionCode = EXCEPTION_WINE_ASSERTION; rec.ExceptionFlags = EH_NONCONTINUABLE; rec.ExceptionRecord = NULL; rec.ExceptionAddress = (LPVOID)context.Rip; rec.NumberParameters = 0; status = raise_exception( &rec, &context, TRUE ); if (status) raise_status( status, &rec ); restore_context( &context, ucontext ); } /********************************************************************** * quit_handler * * Handler for SIGQUIT. */ static void quit_handler( int signal, siginfo_t *siginfo, void *ucontext ) { 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 *ucontext ) { CONTEXT context; save_context( &context, ucontext ); wait_suspend( &context ); restore_context( &context, ucontext ); } /********************************************************************** * get_signal_stack_total_size * * Retrieve the size to allocate for the signal stack, including the TEB at the bottom. * Must be a power of two. */ size_t get_signal_stack_total_size(void) { assert( sizeof(TEB) <= 2*getpagesize() ); return 2*getpagesize(); /* this is just for the TEB, we don't need a signal stack */ } /*********************************************************************** * __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; } /********************************************************************** * signal_init_thread */ void signal_init_thread( TEB *teb ) { #ifdef __linux__ arch_prctl( ARCH_SET_GS, teb ); #else # error Please define setting %gs for your architecture #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_RESTART | SA_SIGINFO; 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 return; error: perror("sigaction"); exit(1); } /********************************************************************** * RtlLookupFunctionEntry (NTDLL.@) */ PRUNTIME_FUNCTION WINAPI RtlLookupFunctionEntry( ULONG64 pc, ULONG64 *base, UNWIND_HISTORY_TABLE *table ) { LDR_MODULE *module; RUNTIME_FUNCTION *func; ULONG size; /* FIXME: should use the history table to make things faster */ if (LdrFindEntryForAddress( (void *)pc, &module )) { WARN( "module not found for %lx\n", pc ); return NULL; } if (!(func = RtlImageDirectoryEntryToData( module->BaseAddress, TRUE, IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size ))) { WARN( "no exception table found in module %p pc %lx\n", module->BaseAddress, pc ); return NULL; } func = find_function_info( pc, module->BaseAddress, func, size ); if (func) *base = (ULONG64)module->BaseAddress; return func; } static ULONG64 get_int_reg( CONTEXT *context, int reg ) { return *(&context->Rax + reg); } static void set_int_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, ULONG64 val ) { *(&context->Rax + reg) = val; if (ctx_ptr) ctx_ptr->u2.IntegerContext[reg] = &context->Rax + reg; } static void set_float_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, M128A val ) { *(&context->u.s.Xmm0 + reg) = val; if (ctx_ptr) ctx_ptr->u1.FloatingContext[reg] = &context->u.s.Xmm0 + reg; } static int get_opcode_size( struct opcode op ) { switch (op.code) { case UWOP_ALLOC_LARGE: return 2 + (op.info != 0); case UWOP_SAVE_NONVOL: case UWOP_SAVE_XMM128: return 2; case UWOP_SAVE_NONVOL_FAR: case UWOP_SAVE_XMM128_FAR: return 3; default: return 1; } } static BOOL is_inside_epilog( BYTE *pc ) { /* add or lea must be the first instruction, and it must have a rex.W prefix */ if ((pc[0] & 0xf8) == 0x48) { switch (pc[1]) { case 0x81: /* add $nnnn,%rsp */ if (pc[0] == 0x48 && pc[2] == 0xc4) { pc += 7; break; } return FALSE; case 0x83: /* add $n,%rsp */ if (pc[0] == 0x48 && pc[2] == 0xc4) { pc += 4; break; } return FALSE; case 0x8d: /* lea n(reg),%rsp */ if (pc[0] & 0x06) return FALSE; /* rex.RX must be cleared */ if (((pc[2] >> 3) & 7) != 4) return FALSE; /* dest reg mus be %rsp */ if ((pc[2] & 7) == 4) return FALSE; /* no SIB byte allowed */ if ((pc[2] >> 6) == 1) /* 8-bit offset */ { pc += 4; break; } if ((pc[2] >> 6) == 2) /* 32-bit offset */ { pc += 7; break; } return FALSE; } } /* now check for various pop instructions */ for (;;) { BYTE rex = 0; if ((*pc & 0xf0) == 0x40) rex = *pc++ & 0x0f; /* rex prefix */ switch (*pc) { case 0x58: /* pop %rax/%r8 */ case 0x59: /* pop %rcx/%r9 */ case 0x5a: /* pop %rdx/%r10 */ case 0x5b: /* pop %rbx/%r11 */ case 0x5c: /* pop %rsp/%r12 */ case 0x5d: /* pop %rbp/%r13 */ case 0x5e: /* pop %rsi/%r14 */ case 0x5f: /* pop %rdi/%r15 */ pc++; continue; case 0xc2: /* ret $nn */ case 0xc3: /* ret */ return TRUE; /* FIXME: add various jump instructions */ } return FALSE; } } /* execute a function epilog, which must have been validated with is_inside_epilog() */ static void interpret_epilog( BYTE *pc, CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr ) { for (;;) { BYTE rex = 0; if ((*pc & 0xf0) == 0x40) rex = *pc++ & 0x0f; /* rex prefix */ switch (*pc) { case 0x58: /* pop %rax/r8 */ case 0x59: /* pop %rcx/r9 */ case 0x5a: /* pop %rdx/r10 */ case 0x5b: /* pop %rbx/r11 */ case 0x5c: /* pop %rsp/r12 */ case 0x5d: /* pop %rbp/r13 */ case 0x5e: /* pop %rsi/r14 */ case 0x5f: /* pop %rdi/r15 */ set_int_reg( context, ctx_ptr, *pc - 0x58 + (rex & 1) * 8, *(ULONG64 *)context->Rsp ); context->Rsp += sizeof(ULONG64); pc++; continue; case 0x81: /* add $nnnn,%rsp */ context->Rsp += *(LONG *)(pc + 2); pc += 2 + sizeof(LONG); continue; case 0x83: /* add $n,%rsp */ context->Rsp += (signed char)pc[2]; pc += 3; continue; case 0x8d: if ((pc[1] >> 6) == 1) /* lea n(reg),%rsp */ { context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + (signed char)pc[2]; pc += 3; } else /* lea nnnn(reg),%rsp */ { context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + *(LONG *)(pc + 2); pc += 2 + sizeof(LONG); } continue; case 0xc2: /* ret $nn */ context->Rip = *(ULONG64 *)context->Rsp; context->Rsp += sizeof(ULONG64) + *(WORD *)(pc + 1); return; case 0xc3: /* ret */ context->Rip = *(ULONG64 *)context->Rsp; context->Rsp += sizeof(ULONG64); return; /* FIXME: add various jump instructions */ } return; } } /********************************************************************** * RtlVirtualUnwind (NTDLL.@) */ PVOID WINAPI RtlVirtualUnwind( ULONG type, ULONG64 base, ULONG64 pc, RUNTIME_FUNCTION *function, CONTEXT *context, PVOID *data, ULONG64 *frame_ret, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr ) { union handler_data *handler_data; ULONG64 frame, off; struct UNWIND_INFO *info; unsigned int i, prolog_offset; TRACE( "type %x rip %lx rsp %lx\n", type, pc, context->Rsp ); if (TRACE_ON(seh)) dump_unwind_info( base, function ); frame = *frame_ret = context->Rsp; for (;;) { info = (struct UNWIND_INFO *)((char *)base + function->UnwindData); handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1]; if (info->version != 1) { FIXME( "unknown unwind info version %u at %p\n", info->version, info ); return NULL; } if (info->frame_reg) frame = get_int_reg( context, info->frame_reg ) - info->frame_offset * 16; /* check if in prolog */ if (pc >= base + function->BeginAddress && pc < base + function->BeginAddress + info->prolog) { prolog_offset = pc - base - function->BeginAddress; } else { prolog_offset = ~0; if (is_inside_epilog( (BYTE *)pc )) { interpret_epilog( (BYTE *)pc, context, ctx_ptr ); *frame_ret = frame; return NULL; } } for (i = 0; i < info->count; i += get_opcode_size(info->opcodes[i])) { if (prolog_offset < info->opcodes[i].offset) continue; /* skip it */ switch (info->opcodes[i].code) { case UWOP_PUSH_NONVOL: /* pushq %reg */ set_int_reg( context, ctx_ptr, info->opcodes[i].info, *(ULONG64 *)context->Rsp ); context->Rsp += sizeof(ULONG64); break; case UWOP_ALLOC_LARGE: /* subq $nn,%rsp */ if (info->opcodes[i].info) context->Rsp += *(DWORD *)&info->opcodes[i+1]; else context->Rsp += *(USHORT *)&info->opcodes[i+1] * 8; break; case UWOP_ALLOC_SMALL: /* subq $n,%rsp */ context->Rsp += (info->opcodes[i].info + 1) * 8; break; case UWOP_SET_FPREG: /* leaq nn(%rsp),%framereg */ context->Rsp = *frame_ret = frame; break; case UWOP_SAVE_NONVOL: /* movq %reg,n(%rsp) */ off = frame + *(USHORT *)&info->opcodes[i+1] * 8; set_int_reg( context, ctx_ptr, info->opcodes[i].info, *(ULONG64 *)off ); break; case UWOP_SAVE_NONVOL_FAR: /* movq %reg,nn(%rsp) */ off = frame + *(DWORD *)&info->opcodes[i+1]; set_int_reg( context, ctx_ptr, info->opcodes[i].info, *(ULONG64 *)off ); break; case UWOP_SAVE_XMM128: /* movaps %xmmreg,n(%rsp) */ off = frame + *(USHORT *)&info->opcodes[i+1] * 16; set_float_reg( context, ctx_ptr, info->opcodes[i].info, *(M128A *)off ); break; case UWOP_SAVE_XMM128_FAR: /* movaps %xmmreg,nn(%rsp) */ off = frame + *(DWORD *)&info->opcodes[i+1]; set_float_reg( context, ctx_ptr, info->opcodes[i].info, *(M128A *)off ); break; case UWOP_PUSH_MACHFRAME: FIXME( "PUSH_MACHFRAME %u\n", info->opcodes[i].info ); break; default: FIXME( "unknown code %u\n", info->opcodes[i].code ); break; } } if (!(info->flags & UNW_FLAG_CHAININFO)) break; function = &handler_data->chain; /* restart with the chained info */ } /* now pop return address */ context->Rip = *(ULONG64 *)context->Rsp; context->Rsp += sizeof(ULONG64); if (!(info->flags & type)) return NULL; /* no matching handler */ if (prolog_offset != ~0) return NULL; /* inside prolog */ *data = &handler_data->handler + 1; return (char *)base + handler_data->handler; } /******************************************************************* * RtlUnwindEx (NTDLL.@) */ void WINAPI RtlUnwindEx( ULONG64 end_frame, ULONG64 target_ip, EXCEPTION_RECORD *rec, ULONG64 retval, CONTEXT *context, UNWIND_HISTORY_TABLE *table ) { EXCEPTION_RECORD record; ULONG64 frame; RUNTIME_FUNCTION *dir, *info; PEXCEPTION_ROUTINE handler; DISPATCHER_CONTEXT dispatch; CONTEXT new_context; LDR_MODULE *module; DWORD size; /* build an exception record, if we do not have one */ if (!rec) { record.ExceptionCode = STATUS_UNWIND; record.ExceptionFlags = 0; record.ExceptionRecord = NULL; record.ExceptionAddress = (void *)context->Rip; record.NumberParameters = 0; rec = &record; } rec->ExceptionFlags |= EH_UNWINDING | (end_frame ? 0 : EH_EXIT_UNWIND); FIXME( "code=%x flags=%x end_frame=%lx target_ip=%lx\n", rec->ExceptionCode, rec->ExceptionFlags, end_frame, target_ip ); frame = context->Rsp; while (frame != end_frame) { /* FIXME: should use the history table to make things faster */ if (LdrFindEntryForAddress( (void *)context->Rip, &module )) { ERR( "no module found for rip %p, can't unwind exception\n", (void *)context->Rip ); raise_status( STATUS_BAD_FUNCTION_TABLE, rec ); } if (!(dir = RtlImageDirectoryEntryToData( module->BaseAddress, TRUE, IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size ))) { ERR( "module %s doesn't contain exception data, can't unwind exception\n", debugstr_w(module->BaseDllName.Buffer) ); raise_status( STATUS_BAD_FUNCTION_TABLE, rec ); } if (!(info = find_function_info( context->Rip, module->BaseAddress, dir, size ))) { /* leaf function */ context->Rip = *(ULONG64 *)context->Rsp; context->Rsp += sizeof(ULONG64); continue; } new_context = *context; handler = RtlVirtualUnwind( UNW_FLAG_UHANDLER, (ULONG64)module->BaseAddress, context->Rip, info, &new_context, &dispatch.HandlerData, &frame, NULL ); if ((frame & 7) || frame < (ULONG64)NtCurrentTeb()->Tib.StackLimit || frame >= (ULONG64)NtCurrentTeb()->Tib.StackBase) { ERR( "invalid frame %lx\n", frame ); raise_status( STATUS_BAD_STACK, rec ); } if (end_frame && (frame > end_frame)) { ERR( "invalid frame %lx/%lx\n", frame, end_frame ); raise_status( STATUS_INVALID_UNWIND_TARGET, rec ); } if (handler) { dispatch.ControlPc = context->Rip; dispatch.ImageBase = (ULONG64)module->BaseAddress; dispatch.FunctionEntry = info; dispatch.EstablisherFrame = frame; dispatch.TargetIp = target_ip; dispatch.ContextRecord = context; dispatch.LanguageHandler = handler; dispatch.HistoryTable = table; dispatch.ScopeIndex = 0; /* FIXME */ TRACE( "calling handler %p (rec=%p, frame=%lx context=%p, dispatch=%p)\n", handler, rec, frame, context, &dispatch ); switch( handler( rec, frame, context, &dispatch )) { case ExceptionContinueSearch: break; case ExceptionCollidedUnwind: FIXME( "ExceptionCollidedUnwind not supported yet\n" ); break; default: raise_status( STATUS_INVALID_DISPOSITION, rec ); break; } } *context = new_context; } context->Rax = retval; context->Rip = target_ip; TRACE( "returning to %lx stack %lx\n", context->Rip, context->Rsp ); set_cpu_context( context ); } /******************************************************************* * RtlUnwind (NTDLL.@) */ void WINAPI __regs_RtlUnwind( ULONG64 frame, ULONG64 target_ip, EXCEPTION_RECORD *rec, ULONG64 retval, CONTEXT *context ) { RtlUnwindEx( frame, target_ip, rec, retval, context, NULL ); } DEFINE_REGS_ENTRYPOINT( RtlUnwind, 4 ) /******************************************************************* * __C_specific_handler (NTDLL.@) */ EXCEPTION_DISPOSITION WINAPI __C_specific_handler( EXCEPTION_RECORD *rec, ULONG64 frame, CONTEXT *context, struct _DISPATCHER_CONTEXT *dispatch ) { SCOPE_TABLE *table = dispatch->HandlerData; ULONG i; TRACE( "%p %lx %p %p\n", rec, frame, context, dispatch ); if (TRACE_ON(seh)) dump_scope_table( dispatch->ImageBase, table ); if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) /* FIXME */ return ExceptionContinueSearch; for (i = 0; i < table->Count; i++) { if (context->Rip >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress && context->Rip < dispatch->ImageBase + table->ScopeRecord[i].EndAddress) { if (!table->ScopeRecord[i].JumpTarget) continue; if (table->ScopeRecord[i].HandlerAddress != EXCEPTION_EXECUTE_HANDLER) { EXCEPTION_POINTERS ptrs; PC_LANGUAGE_EXCEPTION_HANDLER filter; filter = (PC_LANGUAGE_EXCEPTION_HANDLER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress); ptrs.ExceptionRecord = rec; ptrs.ContextRecord = context; TRACE( "calling filter %p ptrs %p frame %lx\n", filter, &ptrs, frame ); switch (filter( &ptrs, frame )) { case EXCEPTION_EXECUTE_HANDLER: break; case EXCEPTION_CONTINUE_SEARCH: continue; case EXCEPTION_CONTINUE_EXECUTION: return ExceptionContinueExecution; } } TRACE( "unwinding to target %lx\n", dispatch->ImageBase + table->ScopeRecord[i].JumpTarget ); RtlUnwindEx( frame, dispatch->ImageBase + table->ScopeRecord[i].JumpTarget, rec, 0, context, dispatch->HistoryTable ); } } return ExceptionContinueSearch; } /******************************************************************* * 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) NtSetContextThread( GetCurrentThread(), context ); return status; } /*********************************************************************** * RtlRaiseException (NTDLL.@) */ void WINAPI __regs_RtlRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context ) { NTSTATUS status; rec->ExceptionAddress = (void *)context->Rip; status = raise_exception( rec, context, TRUE ); if (status != STATUS_SUCCESS) raise_status( status, rec ); } DEFINE_REGS_ENTRYPOINT( RtlRaiseException, 1 ) /********************************************************************** * __wine_enter_vm86 (NTDLL.@) */ void __wine_enter_vm86( CONTEXT *context ) { MESSAGE("vm86 mode not supported on this platform\n"); } /********************************************************************** * DbgBreakPoint (NTDLL.@) */ __ASM_GLOBAL_FUNC( DbgBreakPoint, "int $3; ret") /********************************************************************** * DbgUserBreakPoint (NTDLL.@) */ __ASM_GLOBAL_FUNC( DbgUserBreakPoint, "int $3; ret") #endif /* __x86_64__ */