/* * ARM64 signal handling routines * * Copyright 2010-2013 André Hentschel * * 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 __aarch64__ #include "config.h" #include "wine/port.h" #include #include #include #include #include #ifdef HAVE_UNISTD_H # include #endif #ifdef HAVE_SYS_PARAM_H # include #endif #ifdef HAVE_SYSCALL_H # include #else # ifdef HAVE_SYS_SYSCALL_H # include # endif #endif #ifdef HAVE_SYS_SIGNAL_H # include #endif #ifdef HAVE_SYS_UCONTEXT_H # include #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" #include "winnt.h" WINE_DEFAULT_DEBUG_CHANNEL(seh); WINE_DECLARE_DEBUG_CHANNEL(relay); static pthread_key_t teb_key; /*********************************************************************** * signal context platform-specific definitions */ #ifdef linux /* All Registers access - only for local access */ # define REG_sig(reg_name, context) ((context)->uc_mcontext.reg_name) # define REGn_sig(reg_num, context) ((context)->uc_mcontext.regs[reg_num]) /* Special Registers access */ # define SP_sig(context) REG_sig(sp, context) /* Stack pointer */ # define PC_sig(context) REG_sig(pc, context) /* Program counter */ # define PSTATE_sig(context) REG_sig(pstate, context) /* Current State Register */ # define FP_sig(context) REGn_sig(29, context) /* Frame pointer */ # define LR_sig(context) REGn_sig(30, context) /* Link Register */ /* Exceptions */ # define FAULT_sig(context) REG_sig(fault_address, context) #endif /* linux */ static const size_t teb_size = 0x2000; /* we reserve two pages for the TEB */ static size_t signal_stack_size; typedef void (WINAPI *raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context ); typedef int (*wine_signal_handler)(unsigned int sig); static wine_signal_handler handlers[256]; /*********************************************************************** * dispatch_signal */ static inline int dispatch_signal(unsigned int sig) { if (handlers[sig] == NULL) return 0; return handlers[sig](sig); } /******************************************************************* * is_valid_frame */ static inline BOOL is_valid_frame( void *frame ) { if ((ULONG_PTR)frame & 3) return FALSE; return (frame >= NtCurrentTeb()->Tib.StackLimit && (void **)frame < (void **)NtCurrentTeb()->Tib.StackBase - 1); } /*********************************************************************** * save_context * * Set the register values from a sigcontext. */ static void save_context( CONTEXT *context, const ucontext_t *sigcontext ) { DWORD i; context->ContextFlags = CONTEXT_FULL; context->Fp = FP_sig(sigcontext); /* Frame pointer */ context->Lr = LR_sig(sigcontext); /* Link register */ context->Sp = SP_sig(sigcontext); /* Stack pointer */ context->Pc = PC_sig(sigcontext); /* Program Counter */ context->Cpsr = PSTATE_sig(sigcontext); /* Current State Register */ for (i = 0; i <= 28; i++) context->u.X[i] = REGn_sig( i, sigcontext ); } /*********************************************************************** * restore_context * * Build a sigcontext from the register values. */ static void restore_context( const CONTEXT *context, ucontext_t *sigcontext ) { DWORD i; FP_sig(sigcontext) = context->Fp; /* Frame pointer */ LR_sig(sigcontext) = context->Lr; /* Link register */ SP_sig(sigcontext) = context->Sp; /* Stack pointer */ PC_sig(sigcontext) = context->Pc; /* Program Counter */ PSTATE_sig(sigcontext) = context->Cpsr; /* Current State Register */ for (i = 0; i <= 28; i++) REGn_sig( i, sigcontext ) = context->u.X[i]; } /*********************************************************************** * save_fpu * * Set the FPU context from a sigcontext. */ static inline void save_fpu( CONTEXT *context, const ucontext_t *sigcontext ) { FIXME( "Not implemented on ARM64\n" ); } /*********************************************************************** * restore_fpu * * Restore the FPU context to a sigcontext. */ static inline void restore_fpu( CONTEXT *context, const ucontext_t *sigcontext ) { FIXME( "Not implemented on ARM64\n" ); } /*********************************************************************** * RtlCaptureContext (NTDLL.@) */ /* FIXME: Use the Stack instead of the actual register values? */ __ASM_STDCALL_FUNC( RtlCaptureContext, 8, "stp x0, x1, [sp, #-32]!\n\t" "mov w1, #0x400000\n\t" /* CONTEXT_ARM64 */ "add w1, w1, #0x3\n\t" /* CONTEXT_FULL */ "str w1, [x0]\n\t" /* context->ContextFlags */ /* 32-bit, look at cpsr */ "mrs x1, NZCV\n\t" "str w1, [x0, #0x4]\n\t" /* context->Cpsr */ "ldp x0, x1, [sp], #32\n\t" "str x0, [x0, #0x8]\n\t" /* context->X0 */ "str x1, [x0, #0x10]\n\t" /* context->X1 */ "str x2, [x0, #0x18]\n\t" /* context->X2 */ "str x3, [x0, #0x20]\n\t" /* context->X3 */ "str x4, [x0, #0x28]\n\t" /* context->X4 */ "str x5, [x0, #0x30]\n\t" /* context->X5 */ "str x6, [x0, #0x38]\n\t" /* context->X6 */ "str x7, [x0, #0x40]\n\t" /* context->X7 */ "str x8, [x0, #0x48]\n\t" /* context->X8 */ "str x9, [x0, #0x50]\n\t" /* context->X9 */ "str x10, [x0, #0x58]\n\t" /* context->X10 */ "str x11, [x0, #0x60]\n\t" /* context->X11 */ "str x12, [x0, #0x68]\n\t" /* context->X12 */ "str x13, [x0, #0x70]\n\t" /* context->X13 */ "str x14, [x0, #0x78]\n\t" /* context->X14 */ "str x15, [x0, #0x80]\n\t" /* context->X15 */ "str x16, [x0, #0x88]\n\t" /* context->X16 */ "str x17, [x0, #0x90]\n\t" /* context->X17 */ "str x18, [x0, #0x98]\n\t" /* context->X18 */ "str x19, [x0, #0xa0]\n\t" /* context->X19 */ "str x20, [x0, #0xa8]\n\t" /* context->X20 */ "str x21, [x0, #0xb0]\n\t" /* context->X21 */ "str x22, [x0, #0xb8]\n\t" /* context->X22 */ "str x23, [x0, #0xc0]\n\t" /* context->X23 */ "str x24, [x0, #0xc8]\n\t" /* context->X24 */ "str x25, [x0, #0xd0]\n\t" /* context->X25 */ "str x26, [x0, #0xd8]\n\t" /* context->X26 */ "str x27, [x0, #0xe0]\n\t" /* context->X27 */ "str x28, [x0, #0xe8]\n\t" /* context->X28 */ "str x29, [x0, #0xf0]\n\t" /* context->Fp */ "str x30, [x0, #0xf8]\n\t" /* context->Lr */ "mov x1, sp\n\t" "str x1, [x0, #0x100]\n\t" /* context->Sp */ "adr x1, 1f\n\t" "1: str x1, [x0, #0x108]\n\t" /* context->Pc */ "ret" ) /*********************************************************************** * set_cpu_context * * Set the new CPU context. */ static void set_cpu_context( const CONTEXT *context ) { FIXME( "Not implemented on ARM64\n" ); } /*********************************************************************** * copy_context * * Copy a register context according to the flags. */ static void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags ) { flags &= ~CONTEXT_ARM64; /* get rid of CPU id */ if (flags & CONTEXT_CONTROL) { to->Fp = from->Fp; to->Lr = from->Lr; to->Sp = from->Sp; to->Pc = from->Pc; to->Cpsr = from->Cpsr; } if (flags & CONTEXT_INTEGER) { memcpy( to->u.X, from->u.X, sizeof(to->u.X) ); } if (flags & CONTEXT_FLOATING_POINT) { memcpy( to->V, from->V, sizeof(to->V) ); to->Fpcr = from->Fpcr; to->Fpsr = from->Fpsr; } if (flags & CONTEXT_DEBUG_REGISTERS) { memcpy( to->Bcr, from->Bcr, sizeof(to->Bcr) ); memcpy( to->Bvr, from->Bvr, sizeof(to->Bvr) ); memcpy( to->Wcr, from->Wcr, sizeof(to->Wcr) ); memcpy( to->Wvr, from->Wvr, sizeof(to->Wvr) ); } } /*********************************************************************** * context_to_server * * Convert a register context to the server format. */ NTSTATUS context_to_server( context_t *to, const CONTEXT *from ) { DWORD i, flags = from->ContextFlags & ~CONTEXT_ARM64; /* get rid of CPU id */ memset( to, 0, sizeof(*to) ); to->cpu = CPU_ARM64; if (flags & CONTEXT_CONTROL) { to->flags |= SERVER_CTX_CONTROL; to->integer.arm64_regs.x[29] = from->Fp; to->integer.arm64_regs.x[30] = from->Lr; to->ctl.arm64_regs.sp = from->Sp; to->ctl.arm64_regs.pc = from->Pc; to->ctl.arm64_regs.pstate = from->Cpsr; } if (flags & CONTEXT_INTEGER) { to->flags |= SERVER_CTX_INTEGER; for (i = 0; i <= 28; i++) to->integer.arm64_regs.x[i] = from->u.X[i]; } if (flags & CONTEXT_FLOATING_POINT) { to->flags |= SERVER_CTX_FLOATING_POINT; for (i = 0; i < 64; i++) to->fp.arm64_regs.d[i] = from->V[i / 2].D[i % 2]; to->fp.arm64_regs.fpcr = from->Fpcr; to->fp.arm64_regs.fpsr = from->Fpsr; } if (flags & CONTEXT_DEBUG_REGISTERS) { to->flags |= SERVER_CTX_DEBUG_REGISTERS; for (i = 0; i < ARM64_MAX_BREAKPOINTS; i++) to->debug.arm64_regs.bcr[i] = from->Bcr[i]; for (i = 0; i < ARM64_MAX_BREAKPOINTS; i++) to->debug.arm64_regs.bvr[i] = from->Bvr[i]; for (i = 0; i < ARM64_MAX_WATCHPOINTS; i++) to->debug.arm64_regs.wcr[i] = from->Wcr[i]; for (i = 0; i < ARM64_MAX_WATCHPOINTS; i++) to->debug.arm64_regs.wvr[i] = from->Wvr[i]; } return STATUS_SUCCESS; } /*********************************************************************** * context_from_server * * Convert a register context from the server format. */ NTSTATUS context_from_server( CONTEXT *to, const context_t *from ) { DWORD i; if (from->cpu != CPU_ARM64) return STATUS_INVALID_PARAMETER; to->ContextFlags = CONTEXT_ARM64; if (from->flags & SERVER_CTX_CONTROL) { to->ContextFlags |= CONTEXT_CONTROL; to->Fp = from->integer.arm64_regs.x[29]; to->Lr = from->integer.arm64_regs.x[30]; to->Sp = from->ctl.arm64_regs.sp; to->Pc = from->ctl.arm64_regs.pc; to->Cpsr = from->ctl.arm64_regs.pstate; } if (from->flags & SERVER_CTX_INTEGER) { to->ContextFlags |= CONTEXT_INTEGER; for (i = 0; i <= 28; i++) to->u.X[i] = from->integer.arm64_regs.x[i]; } if (from->flags & SERVER_CTX_FLOATING_POINT) { to->ContextFlags |= CONTEXT_FLOATING_POINT; for (i = 0; i < 64; i++) to->V[i / 2].D[i % 2] = from->fp.arm64_regs.d[i]; to->Fpcr = from->fp.arm64_regs.fpcr; to->Fpsr = from->fp.arm64_regs.fpsr; } if (from->flags & SERVER_CTX_DEBUG_REGISTERS) { to->ContextFlags |= CONTEXT_DEBUG_REGISTERS; for (i = 0; i < ARM64_MAX_BREAKPOINTS; i++) to->Bcr[i] = from->debug.arm64_regs.bcr[i]; for (i = 0; i < ARM64_MAX_BREAKPOINTS; i++) to->Bvr[i] = from->debug.arm64_regs.bvr[i]; for (i = 0; i < ARM64_MAX_WATCHPOINTS; i++) to->Wcr[i] = from->debug.arm64_regs.wcr[i]; for (i = 0; i < ARM64_MAX_WATCHPOINTS; i++) to->Wvr[i] = from->debug.arm64_regs.wvr[i]; } return STATUS_SUCCESS; } /*********************************************************************** * NtSetContextThread (NTDLL.@) * ZwSetContextThread (NTDLL.@) */ NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context ) { NTSTATUS ret; BOOL self; ret = set_thread_context( handle, context, &self ); if (self && ret == STATUS_SUCCESS) set_cpu_context( context ); return ret; } /*********************************************************************** * NtGetContextThread (NTDLL.@) * ZwGetContextThread (NTDLL.@) */ NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context ) { NTSTATUS ret; DWORD needed_flags = context->ContextFlags; BOOL self = (handle == GetCurrentThread()); if (!self) { if ((ret = get_thread_context( handle, context, &self ))) return ret; needed_flags &= ~context->ContextFlags; } if (self && needed_flags) { CONTEXT ctx; RtlCaptureContext( &ctx ); copy_context( context, &ctx, ctx.ContextFlags & needed_flags ); context->ContextFlags |= ctx.ContextFlags & needed_flags; } return STATUS_SUCCESS; } /*********************************************************************** * setup_exception_record * * Setup the exception record and context on the thread stack. */ static EXCEPTION_RECORD *setup_exception( ucontext_t *sigcontext, raise_func func ) { struct stack_layout { CONTEXT context; EXCEPTION_RECORD rec; } *stack; DWORD exception_code = 0; /* push the stack_layout structure */ stack = (struct stack_layout *)((SP_sig(sigcontext) - sizeof(*stack)) & ~15); stack->rec.ExceptionRecord = NULL; stack->rec.ExceptionCode = exception_code; stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE; stack->rec.ExceptionAddress = (LPVOID)PC_sig(sigcontext); stack->rec.NumberParameters = 0; save_context( &stack->context, sigcontext ); /* now modify the sigcontext to return to the raise function */ SP_sig(sigcontext) = (ULONG_PTR)stack; PC_sig(sigcontext) = (ULONG_PTR)func; REGn_sig(0, sigcontext) = (ULONG_PTR)&stack->rec; /* first arg for raise_func */ REGn_sig(1, sigcontext) = (ULONG_PTR)&stack->context; /* second arg for raise_func */ return &stack->rec; } /********************************************************************** * raise_segv_exception */ static void WINAPI raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context ) { NTSTATUS status; switch(rec->ExceptionCode) { case EXCEPTION_ACCESS_VIOLATION: if (rec->NumberParameters == 2) { if (!(rec->ExceptionCode = virtual_handle_fault( (void *)rec->ExceptionInformation[1], rec->ExceptionInformation[0], FALSE ))) goto done; } break; } status = NtRaiseException( rec, context, TRUE ); if (status) raise_status( status, rec ); done: set_cpu_context( context ); } /********************************************************************** * call_stack_handlers * * Call the stack handlers chain. */ static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *context ) { EXCEPTION_REGISTRATION_RECORD *frame, *dispatch, *nested_frame; DWORD res; frame = NtCurrentTeb()->Tib.ExceptionList; nested_frame = NULL; while (frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL) { /* Check frame address */ if (!is_valid_frame( frame )) { rec->ExceptionFlags |= EH_STACK_INVALID; break; } /* Call handler */ TRACE( "calling handler at %p code=%x flags=%x\n", frame->Handler, rec->ExceptionCode, rec->ExceptionFlags ); res = frame->Handler( rec, frame, context, &dispatch ); TRACE( "handler at %p returned %x\n", frame->Handler, res ); if (frame == nested_frame) { /* no longer nested */ nested_frame = NULL; rec->ExceptionFlags &= ~EH_NESTED_CALL; } switch(res) { case ExceptionContinueExecution: if (!(rec->ExceptionFlags & EH_NONCONTINUABLE)) return STATUS_SUCCESS; return STATUS_NONCONTINUABLE_EXCEPTION; case ExceptionContinueSearch: break; case ExceptionNestedException: if (nested_frame < dispatch) nested_frame = dispatch; rec->ExceptionFlags |= EH_NESTED_CALL; break; default: return STATUS_INVALID_DISPOSITION; } frame = frame->Prev; } return STATUS_UNHANDLED_EXCEPTION; } /******************************************************************* * raise_exception * * Implementation of NtRaiseException. */ static NTSTATUS raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance ) { NTSTATUS status; if (first_chance) { DWORD c; for (c = 0; c < rec->NumberParameters; c++) TRACE( " info[%d]=%016lx\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 { /* FIXME: dump context */ } 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 *info, void *ucontext ) { EXCEPTION_RECORD *rec; ucontext_t *context = ucontext; /* check for page fault inside the thread stack */ if (signal == SIGSEGV && (char *)info->si_addr >= (char *)NtCurrentTeb()->DeallocationStack && (char *)info->si_addr < (char *)NtCurrentTeb()->Tib.StackBase && virtual_handle_stack_fault( info->si_addr )) { /* check if this was the last guard page */ if ((char *)info->si_addr < (char *)NtCurrentTeb()->DeallocationStack + 2*4096) { rec = setup_exception( context, raise_segv_exception ); rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW; } return; } rec = setup_exception( context, raise_segv_exception ); if (rec->ExceptionCode == EXCEPTION_STACK_OVERFLOW) return; switch(signal) { case SIGILL: /* Invalid opcode exception */ rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; break; case SIGSEGV: /* Segmentation fault */ rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION; rec->NumberParameters = 2; /* FIXME: Currently the kernel provides no way to determine if it's read or write */ rec->ExceptionInformation[0] = 0; rec->ExceptionInformation[1] = (ULONG_PTR)info->si_addr; break; case SIGBUS: /* Alignment check exception */ rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT; break; default: ERR("Got unexpected signal %i\n", signal); rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; break; } } /********************************************************************** * trap_handler * * Handler for SIGTRAP. */ static void trap_handler( int signal, siginfo_t *info, void *ucontext ) { EXCEPTION_RECORD rec; CONTEXT context; NTSTATUS status; switch ( info->si_code ) { case TRAP_TRACE: rec.ExceptionCode = EXCEPTION_SINGLE_STEP; break; case TRAP_BRKPT: default: rec.ExceptionCode = EXCEPTION_BREAKPOINT; break; } save_context( &context, ucontext ); rec.ExceptionFlags = EXCEPTION_CONTINUABLE; rec.ExceptionRecord = NULL; rec.ExceptionAddress = (LPVOID)context.Pc; rec.NumberParameters = 0; 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 *sigcontext ) { EXCEPTION_RECORD rec; CONTEXT context; NTSTATUS status; save_fpu( &context, sigcontext ); save_context( &context, sigcontext ); switch (siginfo->si_code & 0xffff ) { #ifdef FPE_FLTSUB case FPE_FLTSUB: rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED; break; #endif #ifdef FPE_INTDIV case FPE_INTDIV: rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO; break; #endif #ifdef FPE_INTOVF case FPE_INTOVF: rec.ExceptionCode = EXCEPTION_INT_OVERFLOW; break; #endif #ifdef FPE_FLTDIV case FPE_FLTDIV: rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO; break; #endif #ifdef FPE_FLTOVF case FPE_FLTOVF: rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW; break; #endif #ifdef FPE_FLTUND case FPE_FLTUND: rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW; break; #endif #ifdef FPE_FLTRES case FPE_FLTRES: rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT; break; #endif #ifdef FPE_FLTINV case FPE_FLTINV: #endif default: rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION; break; } rec.ExceptionFlags = EXCEPTION_CONTINUABLE; rec.ExceptionRecord = NULL; rec.ExceptionAddress = (LPVOID)context.Pc; rec.NumberParameters = 0; status = raise_exception( &rec, &context, TRUE ); if (status) raise_status( status, &rec ); restore_context( &context, sigcontext ); restore_fpu( &context, sigcontext ); } /********************************************************************** * int_handler * * Handler for SIGINT. */ static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { if (!dispatch_signal(SIGINT)) { EXCEPTION_RECORD rec; CONTEXT context; NTSTATUS status; save_context( &context, sigcontext ); rec.ExceptionCode = CONTROL_C_EXIT; rec.ExceptionFlags = EXCEPTION_CONTINUABLE; rec.ExceptionRecord = NULL; rec.ExceptionAddress = (LPVOID)context.Pc; rec.NumberParameters = 0; status = raise_exception( &rec, &context, TRUE ); if (status) raise_status( status, &rec ); restore_context( &context, sigcontext ); } } /********************************************************************** * abrt_handler * * Handler for SIGABRT. */ static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD rec; CONTEXT context; NTSTATUS status; save_context( &context, sigcontext ); rec.ExceptionCode = EXCEPTION_WINE_ASSERTION; rec.ExceptionFlags = EH_NONCONTINUABLE; rec.ExceptionRecord = NULL; rec.ExceptionAddress = (LPVOID)context.Pc; rec.NumberParameters = 0; status = raise_exception( &rec, &context, TRUE ); if (status) raise_status( status, &rec ); restore_context( &context, sigcontext ); } /********************************************************************** * quit_handler * * Handler for SIGQUIT. */ static void quit_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { 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; save_context( &context, sigcontext ); wait_suspend( &context ); restore_context( &context, sigcontext ); } /*********************************************************************** * __wine_set_signal_handler (NTDLL.@) */ int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh) { if (sig >= sizeof(handlers) / sizeof(handlers[0])) return -1; if (handlers[sig] != NULL) return -2; handlers[sig] = wsh; return 0; } /********************************************************************** * signal_alloc_thread */ NTSTATUS signal_alloc_thread( TEB **teb ) { static size_t sigstack_zero_bits; SIZE_T size; NTSTATUS status; if (!sigstack_zero_bits) { size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 ); /* find the first power of two not smaller than min_size */ sigstack_zero_bits = 12; while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++; signal_stack_size = (1 << sigstack_zero_bits) - teb_size; assert( sizeof(TEB) <= teb_size ); } size = 1 << sigstack_zero_bits; *teb = NULL; if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), (void **)teb, sigstack_zero_bits, &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE ))) { (*teb)->Tib.Self = &(*teb)->Tib; (*teb)->Tib.ExceptionList = (void *)~0UL; } return status; } /********************************************************************** * signal_free_thread */ void signal_free_thread( TEB *teb ) { SIZE_T size = 0; NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE ); } /********************************************************************** * signal_init_thread */ void signal_init_thread( TEB *teb ) { static BOOL init_done; if (!init_done) { pthread_key_create( &teb_key, NULL ); init_done = TRUE; } /* Win64/ARM applications expect the TEB pointer to be in the x18 platform register. */ __asm__ __volatile__( "mov x18, %0" : : "r" (teb) ); pthread_setspecific( teb_key, teb ); } /********************************************************************** * 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); } /********************************************************************** * __wine_enter_vm86 (NTDLL.@) */ void __wine_enter_vm86( CONTEXT *context ) { MESSAGE("vm86 mode not supported on this platform\n"); } /*********************************************************************** * RtlUnwind (NTDLL.@) */ void WINAPI RtlUnwind( PVOID pEndFrame, PVOID targetIp, PEXCEPTION_RECORD pRecord, PVOID retval ) { FIXME( "Not implemented on ARM64\n" ); } /******************************************************************* * 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 RtlRaiseException( EXCEPTION_RECORD *rec ) { CONTEXT context; NTSTATUS status; RtlCaptureContext( &context ); rec->ExceptionAddress = (LPVOID)context.Pc; status = raise_exception( rec, &context, TRUE ); if (status) raise_status( status, rec ); } /************************************************************************* * RtlCaptureStackBackTrace (NTDLL.@) */ USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) { FIXME( "(%d, %d, %p, %p) stub!\n", skip, count, buffer, hash ); return 0; } /*********************************************************************** * call_thread_entry_point */ static void WINAPI call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void *arg ) { __TRY { TRACE_(relay)( "\1Starting thread proc %p (arg=%p)\n", entry, arg ); RtlExitUserThread( entry( arg )); } __EXCEPT(unhandled_exception_filter) { NtTerminateThread( GetCurrentThread(), GetExceptionCode() ); } __ENDTRY abort(); /* should not be reached */ } typedef void (WINAPI *thread_start_func)(LPTHREAD_START_ROUTINE,void *); struct startup_info { thread_start_func start; LPTHREAD_START_ROUTINE entry; void *arg; BOOL suspend; }; /*********************************************************************** * thread_startup */ static void thread_startup( void *param ) { CONTEXT context = { 0 }; struct startup_info *info = param; /* build the initial context */ context.ContextFlags = CONTEXT_FULL; context.u.s.X0 = (DWORD_PTR)info->entry; context.u.s.X1 = (DWORD_PTR)info->arg; context.Sp = (DWORD_PTR)NtCurrentTeb()->Tib.StackBase; context.Pc = (DWORD_PTR)info->start; attach_dlls( &context, info->suspend ); ((thread_start_func)context.Pc)( (LPTHREAD_START_ROUTINE)context.u.s.X0, (void *)context.u.s.X1 ); } /*********************************************************************** * signal_start_thread * * Thread startup sequence: * signal_start_thread() * -> thread_startup() * -> call_thread_entry_point() */ void signal_start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend ) { struct startup_info info = { call_thread_entry_point, entry, arg, suspend }; wine_switch_to_stack( thread_startup, &info, NtCurrentTeb()->Tib.StackBase ); } /********************************************************************** * signal_start_process * * Process startup sequence: * signal_start_process() * -> thread_startup() * -> kernel32_start_process() */ void signal_start_process( LPTHREAD_START_ROUTINE entry, BOOL suspend ) { struct startup_info info = { kernel32_start_process, entry, NtCurrentTeb()->Peb, suspend }; wine_switch_to_stack( thread_startup, &info, NtCurrentTeb()->Tib.StackBase ); } /*********************************************************************** * signal_exit_thread */ void signal_exit_thread( int status ) { exit_thread( status ); } /*********************************************************************** * signal_exit_process */ void signal_exit_process( int status ) { exit( status ); } /********************************************************************** * DbgBreakPoint (NTDLL.@) */ void WINAPI DbgBreakPoint(void) { kill(getpid(), SIGTRAP); } /********************************************************************** * DbgUserBreakPoint (NTDLL.@) */ void WINAPI DbgUserBreakPoint(void) { kill(getpid(), SIGTRAP); } /********************************************************************** * NtCurrentTeb (NTDLL.@) */ TEB * WINAPI NtCurrentTeb(void) { return pthread_getspecific( teb_key ); } #endif /* __aarch64__ */