/* * 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 */ #if 0 #pragma makedep unix #endif #ifdef __aarch64__ #include "config.h" #include "wine/port.h" #include #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 #ifdef HAVE_LIBUNWIND # define UNW_LOCAL_ONLY # include #endif #define NONAMELESSUNION #define NONAMELESSSTRUCT #include "ntstatus.h" #define WIN32_NO_STATUS #include "windef.h" #include "winnt.h" #include "winternl.h" #include "wine/exception.h" #include "wine/asm.h" #include "unix_private.h" #include "wine/debug.h" WINE_DEFAULT_DEBUG_CHANNEL(seh); /*********************************************************************** * 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 */ static struct _aarch64_ctx *get_extended_sigcontext( ucontext_t *sigcontext, unsigned int magic ) { struct _aarch64_ctx *ctx = (struct _aarch64_ctx *)sigcontext->uc_mcontext.__reserved; while ((char *)ctx < (char *)(&sigcontext->uc_mcontext + 1) && ctx->magic && ctx->size) { if (ctx->magic == magic) return ctx; ctx = (struct _aarch64_ctx *)((char *)ctx + ctx->size); } return NULL; } static struct fpsimd_context *get_fpsimd_context( ucontext_t *sigcontext ) { return (struct fpsimd_context *)get_extended_sigcontext( sigcontext, FPSIMD_MAGIC ); } static DWORD64 get_fault_esr( ucontext_t *sigcontext ) { struct esr_context *esr = (struct esr_context *)get_extended_sigcontext( sigcontext, ESR_MAGIC ); if (esr) return esr->esr; return 0; } #elif defined(__APPLE__) /* All Registers access - only for local access */ # define REG_sig(reg_name, context) ((context)->uc_mcontext->__ss.__ ## reg_name) # define REGn_sig(reg_num, context) ((context)->uc_mcontext->__ss.__x[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(cpsr, context) /* Current State Register */ # define FP_sig(context) REG_sig(fp, context) /* Frame pointer */ # define LR_sig(context) REG_sig(lr, context) /* Link Register */ static DWORD64 get_fault_esr( ucontext_t *sigcontext ) { return sigcontext->uc_mcontext->__es.__esr; } #endif /* linux */ static pthread_key_t teb_key; struct syscall_frame { ULONG64 x29; ULONG64 thunk_addr; ULONG64 x0, x1, x2, x3, x4, x5, x6, x7, x8; struct syscall_frame *prev_frame; ULONG64 x19, x20, x21, x22, x23, x24, x25, x26, x27, x28; ULONG64 thunk_x29; ULONG64 ret_addr; }; struct arm64_thread_data { void *exit_frame; /* 02f0 exit frame pointer */ struct syscall_frame *syscall_frame; /* 02f8 frame pointer on syscall entry */ CONTEXT *context; /* 0300 context to set with SIGUSR2 */ }; C_ASSERT( sizeof(struct arm64_thread_data) <= sizeof(((struct ntdll_thread_data *)0)->cpu_data) ); C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct arm64_thread_data, exit_frame ) == 0x2f0 ); C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct arm64_thread_data, syscall_frame ) == 0x2f8 ); static inline struct arm64_thread_data *arm64_thread_data(void) { return (struct arm64_thread_data *)ntdll_get_thread_data()->cpu_data; } /*********************************************************************** * unwind_builtin_dll * * Equivalent of RtlVirtualUnwind for builtin modules. */ NTSTATUS CDECL unwind_builtin_dll( ULONG type, DISPATCHER_CONTEXT *dispatch, CONTEXT *context ) { #ifdef HAVE_LIBUNWIND ULONG_PTR ip = context->Pc; unw_context_t unw_context; unw_cursor_t cursor; unw_proc_info_t info; int rc; #ifdef __APPLE__ rc = unw_getcontext( &unw_context ); if (rc == UNW_ESUCCESS) rc = unw_init_local( &cursor, &unw_context ); if (rc == UNW_ESUCCESS) { int i; for (i = 0; i <= 28; i++) unw_set_reg( &cursor, UNW_ARM64_X0 + i, context->u.X[i] ); unw_set_reg( &cursor, UNW_ARM64_FP, context->u.s.Fp ); unw_set_reg( &cursor, UNW_ARM64_LR, context->u.s.Lr ); unw_set_reg( &cursor, UNW_ARM64_SP, context->Sp ); unw_set_reg( &cursor, UNW_REG_IP, context->Pc ); } #else memcpy( unw_context.uc_mcontext.regs, context->u.X, sizeof(context->u.X) ); unw_context.uc_mcontext.sp = context->Sp; unw_context.uc_mcontext.pc = context->Pc; rc = unw_init_local( &cursor, &unw_context ); #endif if (rc != UNW_ESUCCESS) { WARN( "setup failed: %d\n", rc ); return STATUS_INVALID_DISPOSITION; } rc = unw_get_proc_info( &cursor, &info ); if (rc != UNW_ESUCCESS && rc != -UNW_ENOINFO) { WARN( "failed to get info: %d\n", rc ); return STATUS_INVALID_DISPOSITION; } if (rc == -UNW_ENOINFO || ip < info.start_ip || ip > info.end_ip) { TRACE( "no info found for %lx ip %lx-%lx, assuming leaf function\n", ip, info.start_ip, info.end_ip ); dispatch->LanguageHandler = NULL; dispatch->EstablisherFrame = context->Sp; context->Pc = context->u.s.Lr; context->Sp = context->Sp + sizeof(ULONG64); context->ContextFlags |= CONTEXT_UNWOUND_TO_CALL; return STATUS_SUCCESS; } TRACE( "ip %#lx function %#lx-%#lx personality %#lx lsda %#lx fde %#lx\n", ip, (unsigned long)info.start_ip, (unsigned long)info.end_ip, (unsigned long)info.handler, (unsigned long)info.lsda, (unsigned long)info.unwind_info ); rc = unw_step( &cursor ); if (rc < 0) { WARN( "failed to unwind: %d %d\n", rc, UNW_ENOINFO ); return STATUS_INVALID_DISPOSITION; } dispatch->LanguageHandler = (void *)info.handler; dispatch->HandlerData = (void *)info.lsda; dispatch->EstablisherFrame = context->Sp; #ifdef __APPLE__ { int i; for (i = 0; i <= 28; i++) unw_get_reg( &cursor, UNW_ARM64_X0 + i, (unw_word_t *)&context->u.X[i] ); } unw_get_reg( &cursor, UNW_ARM64_FP, (unw_word_t *)&context->u.s.Fp ); unw_get_reg( &cursor, UNW_ARM64_X30, (unw_word_t *)&context->u.s.Lr ); unw_get_reg( &cursor, UNW_ARM64_SP, (unw_word_t *)&context->Sp ); #else unw_get_reg( &cursor, UNW_AARCH64_X0, (unw_word_t *)&context->u.s.X0 ); unw_get_reg( &cursor, UNW_AARCH64_X1, (unw_word_t *)&context->u.s.X1 ); unw_get_reg( &cursor, UNW_AARCH64_X2, (unw_word_t *)&context->u.s.X2 ); unw_get_reg( &cursor, UNW_AARCH64_X3, (unw_word_t *)&context->u.s.X3 ); unw_get_reg( &cursor, UNW_AARCH64_X4, (unw_word_t *)&context->u.s.X4 ); unw_get_reg( &cursor, UNW_AARCH64_X5, (unw_word_t *)&context->u.s.X5 ); unw_get_reg( &cursor, UNW_AARCH64_X6, (unw_word_t *)&context->u.s.X6 ); unw_get_reg( &cursor, UNW_AARCH64_X7, (unw_word_t *)&context->u.s.X7 ); unw_get_reg( &cursor, UNW_AARCH64_X8, (unw_word_t *)&context->u.s.X8 ); unw_get_reg( &cursor, UNW_AARCH64_X9, (unw_word_t *)&context->u.s.X9 ); unw_get_reg( &cursor, UNW_AARCH64_X10, (unw_word_t *)&context->u.s.X10 ); unw_get_reg( &cursor, UNW_AARCH64_X11, (unw_word_t *)&context->u.s.X11 ); unw_get_reg( &cursor, UNW_AARCH64_X12, (unw_word_t *)&context->u.s.X12 ); unw_get_reg( &cursor, UNW_AARCH64_X13, (unw_word_t *)&context->u.s.X13 ); unw_get_reg( &cursor, UNW_AARCH64_X14, (unw_word_t *)&context->u.s.X14 ); unw_get_reg( &cursor, UNW_AARCH64_X15, (unw_word_t *)&context->u.s.X15 ); unw_get_reg( &cursor, UNW_AARCH64_X16, (unw_word_t *)&context->u.s.X16 ); unw_get_reg( &cursor, UNW_AARCH64_X17, (unw_word_t *)&context->u.s.X17 ); unw_get_reg( &cursor, UNW_AARCH64_X18, (unw_word_t *)&context->u.s.X18 ); unw_get_reg( &cursor, UNW_AARCH64_X19, (unw_word_t *)&context->u.s.X19 ); unw_get_reg( &cursor, UNW_AARCH64_X20, (unw_word_t *)&context->u.s.X20 ); unw_get_reg( &cursor, UNW_AARCH64_X21, (unw_word_t *)&context->u.s.X21 ); unw_get_reg( &cursor, UNW_AARCH64_X22, (unw_word_t *)&context->u.s.X22 ); unw_get_reg( &cursor, UNW_AARCH64_X23, (unw_word_t *)&context->u.s.X23 ); unw_get_reg( &cursor, UNW_AARCH64_X24, (unw_word_t *)&context->u.s.X24 ); unw_get_reg( &cursor, UNW_AARCH64_X25, (unw_word_t *)&context->u.s.X25 ); unw_get_reg( &cursor, UNW_AARCH64_X26, (unw_word_t *)&context->u.s.X26 ); unw_get_reg( &cursor, UNW_AARCH64_X27, (unw_word_t *)&context->u.s.X27 ); unw_get_reg( &cursor, UNW_AARCH64_X28, (unw_word_t *)&context->u.s.X28 ); unw_get_reg( &cursor, UNW_AARCH64_X29, (unw_word_t *)&context->u.s.Fp ); unw_get_reg( &cursor, UNW_AARCH64_X30, (unw_word_t *)&context->u.s.Lr ); unw_get_reg( &cursor, UNW_AARCH64_SP, (unw_word_t *)&context->Sp ); #endif unw_get_reg( &cursor, UNW_REG_IP, (unw_word_t *)&context->Pc ); context->ContextFlags |= CONTEXT_UNWOUND_TO_CALL; TRACE( "next function pc=%016lx%s\n", context->Pc, rc ? "" : " (last frame)" ); TRACE(" x0=%016lx x1=%016lx x2=%016lx x3=%016lx\n", context->u.s.X0, context->u.s.X1, context->u.s.X2, context->u.s.X3 ); TRACE(" x4=%016lx x5=%016lx x6=%016lx x7=%016lx\n", context->u.s.X4, context->u.s.X5, context->u.s.X6, context->u.s.X7 ); TRACE(" x8=%016lx x9=%016lx x10=%016lx x11=%016lx\n", context->u.s.X8, context->u.s.X9, context->u.s.X10, context->u.s.X11 ); TRACE(" x12=%016lx x13=%016lx x14=%016lx x15=%016lx\n", context->u.s.X12, context->u.s.X13, context->u.s.X14, context->u.s.X15 ); TRACE(" x16=%016lx x17=%016lx x18=%016lx x19=%016lx\n", context->u.s.X16, context->u.s.X17, context->u.s.X18, context->u.s.X19 ); TRACE(" x20=%016lx x21=%016lx x22=%016lx x23=%016lx\n", context->u.s.X20, context->u.s.X21, context->u.s.X22, context->u.s.X23 ); TRACE(" x24=%016lx x25=%016lx x26=%016lx x27=%016lx\n", context->u.s.X24, context->u.s.X25, context->u.s.X26, context->u.s.X27 ); TRACE(" x28=%016lx fp=%016lx lr=%016lx sp=%016lx\n", context->u.s.X28, context->u.s.Fp, context->u.s.Lr, context->Sp ); return STATUS_SUCCESS; #else return STATUS_INVALID_DISPOSITION; #endif } /*********************************************************************** * 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->u.s.Fp = FP_sig(sigcontext); /* Frame pointer */ context->u.s.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->u.s.Fp; /* Frame pointer */ LR_sig(sigcontext) = context->u.s.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 void save_fpu( CONTEXT *context, ucontext_t *sigcontext ) { #ifdef linux struct fpsimd_context *fp = get_fpsimd_context( sigcontext ); if (!fp) return; context->ContextFlags |= CONTEXT_FLOATING_POINT; context->Fpcr = fp->fpcr; context->Fpsr = fp->fpsr; memcpy( context->V, fp->vregs, sizeof(context->V) ); #elif defined(__APPLE__) context->ContextFlags |= CONTEXT_FLOATING_POINT; context->Fpcr = sigcontext->uc_mcontext->__ns.__fpcr; context->Fpsr = sigcontext->uc_mcontext->__ns.__fpsr; memcpy( context->V, sigcontext->uc_mcontext->__ns.__v, sizeof(context->V) ); #endif } /*********************************************************************** * restore_fpu * * Restore the FPU context to a sigcontext. */ static void restore_fpu( CONTEXT *context, ucontext_t *sigcontext ) { #ifdef linux struct fpsimd_context *fp = get_fpsimd_context( sigcontext ); if (!fp) return; fp->fpcr = context->Fpcr; fp->fpsr = context->Fpsr; memcpy( fp->vregs, context->V, sizeof(fp->vregs) ); #elif defined(__APPLE__) sigcontext->uc_mcontext->__ns.__fpcr = context->Fpcr; sigcontext->uc_mcontext->__ns.__fpsr = context->Fpsr; memcpy( sigcontext->uc_mcontext->__ns.__v, context->V, sizeof(context->V) ); #endif } /*********************************************************************** * get_server_context_flags * * Convert CPU-specific flags to generic server flags */ static unsigned int get_server_context_flags( DWORD flags ) { unsigned int ret = 0; flags &= ~CONTEXT_ARM64; /* get rid of CPU id */ if (flags & CONTEXT_CONTROL) ret |= SERVER_CTX_CONTROL; if (flags & CONTEXT_INTEGER) ret |= SERVER_CTX_INTEGER; if (flags & CONTEXT_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT; if (flags & CONTEXT_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS; return ret; } /*********************************************************************** * 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->u.s.Fp; to->integer.arm64_regs.x[30] = from->u.s.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 < 32; i++) { to->fp.arm64_regs.q[i].low = from->V[i].s.Low; to->fp.arm64_regs.q[i].high = from->V[i].s.High; } 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->u.s.Fp = from->integer.arm64_regs.x[29]; to->u.s.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 < 32; i++) { to->V[i].s.Low = from->fp.arm64_regs.q[i].low; to->V[i].s.High = from->fp.arm64_regs.q[i].high; } 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 = STATUS_SUCCESS; BOOL self = (handle == GetCurrentThread()); if (self && (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_ARM64))) self = FALSE; if (!self) { context_t server_context; context_to_server( &server_context, context ); ret = set_thread_context( handle, &server_context, &self ); } if (self && ret == STATUS_SUCCESS) { InterlockedExchangePointer( (void **)&arm64_thread_data()->context, (void *)context ); raise( SIGUSR2 ); } return ret; } /*********************************************************************** * NtGetContextThread (NTDLL.@) * ZwGetContextThread (NTDLL.@) */ NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context ) { NTSTATUS ret; struct syscall_frame *frame = arm64_thread_data()->syscall_frame; DWORD needed_flags = context->ContextFlags & ~CONTEXT_ARM64; BOOL self = (handle == GetCurrentThread()); if (!self) { context_t server_context; unsigned int server_flags = get_server_context_flags( context->ContextFlags ); if ((ret = get_thread_context( handle, &server_context, server_flags, &self ))) return ret; if ((ret = context_from_server( context, &server_context ))) return ret; needed_flags &= ~context->ContextFlags; } if (self) { if (needed_flags & CONTEXT_INTEGER) { memset( context->u.X, 0, sizeof(context->u.X[0]) * 18 ); context->u.X[18] = (DWORD64)NtCurrentTeb(); memcpy( context->u.X + 19, &frame->x19, sizeof(context->u.X[0]) * 10 ); context->ContextFlags |= CONTEXT_INTEGER; } if (needed_flags & CONTEXT_CONTROL) { context->u.s.Fp = frame->x29; context->u.s.Lr = frame->ret_addr; context->Sp = (ULONG64)&frame->thunk_x29; context->Pc = frame->thunk_addr; context->Cpsr = 0; context->ContextFlags |= CONTEXT_CONTROL; } if (needed_flags & CONTEXT_FLOATING_POINT) FIXME( "floating point not supported\n" ); if (needed_flags & CONTEXT_DEBUG_REGISTERS) FIXME( "debug registers not supported\n" ); } return STATUS_SUCCESS; } extern void raise_func_trampoline( EXCEPTION_RECORD *rec, CONTEXT *context, void *dispatcher, void *sp ); __ASM_GLOBAL_FUNC( raise_func_trampoline, __ASM_CFI(".cfi_signal_frame\n\t") "stp x29, x30, [sp, #-0x20]!\n\t" __ASM_CFI(".cfi_def_cfa_offset 32\n\t") __ASM_CFI(".cfi_offset 29, -32\n\t") __ASM_CFI(".cfi_offset 30, -24\n\t") "mov x29, sp\n\t" __ASM_CFI(".cfi_def_cfa_register 29\n\t") "str x3, [sp, 0x10]\n\t" __ASM_CFI(".cfi_remember_state\n\t") __ASM_CFI(".cfi_escape 0x0f,0x03,0x8d,0x10,0x06\n\t") /* CFA */ __ASM_CFI(".cfi_escape 0x10,0x1d,0x02,0x8d,0x00\n\t") /* x29 */ __ASM_CFI(".cfi_escape 0x10,0x1e,0x02,0x8d,0x08\n\t") /* x30 */ "blr x2\n\t" __ASM_CFI(".cfi_restore_state\n\t") "brk #1") /*********************************************************************** * setup_exception * * Modify the signal context to call the exception raise function. */ static void setup_exception( ucontext_t *sigcontext, EXCEPTION_RECORD *rec ) { struct { CONTEXT context; EXCEPTION_RECORD rec; void *redzone[3]; } *stack; void *stack_ptr = (void *)(SP_sig(sigcontext) & ~15); CONTEXT context; NTSTATUS status; rec->ExceptionAddress = (void *)PC_sig(sigcontext); save_context( &context, sigcontext ); save_fpu( &context, sigcontext ); if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context.Pc += 4; status = send_debug_event( rec, &context, TRUE ); if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED) { restore_context( &context, sigcontext ); return; } stack = virtual_setup_exception( stack_ptr, (sizeof(*stack) + 15) & ~15, rec ); stack->rec = *rec; stack->context = context; REGn_sig(3, sigcontext) = SP_sig(sigcontext); /* original stack pointer, fourth arg for raise_func_trampoline */ SP_sig(sigcontext) = (ULONG_PTR)stack; LR_sig(sigcontext) = PC_sig(sigcontext); PC_sig(sigcontext) = (ULONG_PTR)raise_func_trampoline; REGn_sig(0, sigcontext) = (ULONG_PTR)&stack->rec; /* first arg for KiUserExceptionDispatcher */ REGn_sig(1, sigcontext) = (ULONG_PTR)&stack->context; /* second arg for KiUserExceptionDispatcher */ REGn_sig(2, sigcontext) = (ULONG_PTR)pKiUserExceptionDispatcher; /* dispatcher arg for raise_func_trampoline */ REGn_sig(18, sigcontext) = (ULONG_PTR)NtCurrentTeb(); } /*********************************************************************** * call_user_apc */ void WINAPI call_user_apc( CONTEXT *context_ptr, ULONG_PTR ctx, ULONG_PTR arg1, ULONG_PTR arg2, PNTAPCFUNC func ) { CONTEXT context; if (!context_ptr) { context.ContextFlags = CONTEXT_FULL; NtGetContextThread( GetCurrentThread(), &context ); context.u.s.X0 = STATUS_USER_APC; context_ptr = &context; } pKiUserApcDispatcher( context_ptr, ctx, arg1, arg2, func ); } /*********************************************************************** * call_raise_user_exception_dispatcher */ __ASM_GLOBAL_FUNC( call_raise_user_exception_dispatcher, "mov x2, x0\n\t" /* dispatcher */ "b " __ASM_NAME("call_user_exception_dispatcher") ) /*********************************************************************** * call_user_exception_dispatcher */ __ASM_GLOBAL_FUNC( call_user_exception_dispatcher, "mov x19, x0\n\t" "mov x20, x1\n\t" "mov x21, x2\n\t" "bl " __ASM_NAME("NtCurrentTeb") "\n\t" "add x4, x0, #0x2f8\n\t" /* arm64_thread_data()->syscall_frame */ "ldr x5, [x4]\n\t" "ldr x6, [x5, #88]\n\t" /* frame->prev_frame */ "str x6, [x4]\n\t" "mov x0, x19\n\t" "mov x1, x20\n\t" "mov x2, x21\n\t" "ldp x19, x20, [x5, #96]\n\t" /* frame->x19,x20 */ "ldp x21, x22, [x5, #112]\n\t" /* frame->x21,x22 */ "ldp x23, x24, [x5, #128]\n\t" /* frame->x23,x24 */ "ldp x25, x26, [x5, #144]\n\t" /* frame->x25,x26 */ "ldp x27, x28, [x5, #160]\n\t" /* frame->x27,x28 */ "ldp x29, x30, [x5, #176]\n\t" /* frame->thunk_x29,ret_addr */ "add sp, x5, #192\n\t" "br x2" ) /********************************************************************** * segv_handler * * Handler for SIGSEGV. */ static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD rec = { 0 }; ucontext_t *context = sigcontext; rec.NumberParameters = 2; rec.ExceptionInformation[0] = (get_fault_esr( context ) & 0x40) != 0; rec.ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr; rec.ExceptionCode = virtual_handle_fault( siginfo->si_addr, rec.ExceptionInformation[0], (void *)SP_sig(context) ); if (!rec.ExceptionCode) return; setup_exception( context, &rec ); } /********************************************************************** * ill_handler * * Handler for SIGILL. */ static void ill_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD rec = { EXCEPTION_ILLEGAL_INSTRUCTION }; setup_exception( sigcontext, &rec ); } /********************************************************************** * bus_handler * * Handler for SIGBUS. */ static void bus_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD rec = { EXCEPTION_DATATYPE_MISALIGNMENT }; setup_exception( sigcontext, &rec ); } /********************************************************************** * trap_handler * * Handler for SIGTRAP. */ static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD rec = { 0 }; switch (siginfo->si_code) { case TRAP_TRACE: rec.ExceptionCode = EXCEPTION_SINGLE_STEP; break; case TRAP_BRKPT: default: rec.ExceptionCode = EXCEPTION_BREAKPOINT; rec.NumberParameters = 1; break; } setup_exception( sigcontext, &rec ); } /********************************************************************** * fpe_handler * * Handler for SIGFPE. */ static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD rec = { 0 }; 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; } setup_exception( sigcontext, &rec ); } /********************************************************************** * int_handler * * Handler for SIGINT. */ static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD rec = { CONTROL_C_EXIT }; setup_exception( sigcontext, &rec ); } /********************************************************************** * abrt_handler * * Handler for SIGABRT. */ static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD rec = { EXCEPTION_WINE_ASSERTION, EH_NONCONTINUABLE }; setup_exception( sigcontext, &rec ); } /********************************************************************** * 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 ); } /********************************************************************** * usr2_handler * * Handler for SIGUSR2, used to set a thread context. */ static void usr2_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { CONTEXT *context = InterlockedExchangePointer( (void **)&arm64_thread_data()->context, NULL ); if (!context) return; if ((context->ContextFlags & ~CONTEXT_ARM64) & CONTEXT_FLOATING_POINT) restore_fpu( context, sigcontext ); restore_context( context, sigcontext ); } /********************************************************************** * get_thread_ldt_entry */ NTSTATUS get_thread_ldt_entry( HANDLE handle, void *data, ULONG len, ULONG *ret_len ) { return STATUS_NOT_IMPLEMENTED; } /****************************************************************************** * NtSetLdtEntries (NTDLL.@) * ZwSetLdtEntries (NTDLL.@) */ NTSTATUS WINAPI NtSetLdtEntries( ULONG sel1, LDT_ENTRY entry1, ULONG sel2, LDT_ENTRY entry2 ) { return STATUS_NOT_IMPLEMENTED; } /********************************************************************** * signal_init_threading */ void signal_init_threading(void) { pthread_key_create( &teb_key, NULL ); } /********************************************************************** * signal_alloc_thread */ NTSTATUS signal_alloc_thread( TEB *teb ) { return STATUS_SUCCESS; } /********************************************************************** * signal_free_thread */ void signal_free_thread( TEB *teb ) { } /********************************************************************** * signal_init_thread */ void signal_init_thread( TEB *teb ) { /* 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_SIGINFO | SA_RESTART | SA_ONSTACK; 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 = usr2_handler; if (sigaction( SIGUSR2, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = trap_handler; if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = segv_handler; if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = ill_handler; if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = bus_handler; if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error; return; error: perror("sigaction"); exit(1); } /*********************************************************************** * init_thread_context */ static void init_thread_context( CONTEXT *context, LPTHREAD_START_ROUTINE entry, void *arg, void *relay ) { context->u.s.X0 = (DWORD64)entry; context->u.s.X1 = (DWORD64)arg; context->u.s.X18 = (DWORD64)NtCurrentTeb(); context->Sp = (DWORD64)NtCurrentTeb()->Tib.StackBase; context->Pc = (DWORD64)relay; } /*********************************************************************** * get_initial_context */ PCONTEXT DECLSPEC_HIDDEN get_initial_context( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend, void *relay ) { CONTEXT *ctx; if (suspend) { CONTEXT context = { CONTEXT_ALL }; init_thread_context( &context, entry, arg, relay ); wait_suspend( &context ); ctx = (CONTEXT *)((ULONG_PTR)context.Sp & ~15) - 1; *ctx = context; } else { ctx = (CONTEXT *)NtCurrentTeb()->Tib.StackBase - 1; init_thread_context( ctx, entry, arg, relay ); } pthread_sigmask( SIG_UNBLOCK, &server_block_set, NULL ); ctx->ContextFlags = CONTEXT_FULL | CONTEXT_FLOATING_POINT; return ctx; } /*********************************************************************** * signal_start_thread */ __ASM_GLOBAL_FUNC( signal_start_thread, "stp x29, x30, [sp,#-16]!\n\t" "mov x19, x4\n\t" /* thunk */ "mov x18, x5\n\t" /* teb */ /* store exit frame */ "mov x29, sp\n\t" "str x29, [x5, #0x2f0]\n\t" /* arm64_thread_data()->exit_frame */ /* switch to thread stack */ "ldr x5, [x5, #8]\n\t" /* teb->Tib.StackBase */ "sub sp, x5, #0x1000\n\t" /* attach dlls */ "bl " __ASM_NAME("get_initial_context") "\n\t" "add x1, x0, #4\n\t" /* &context->X0 */ "mov lr, #0\n\t" "br x19" ) extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), TEB *teb ); __ASM_GLOBAL_FUNC( call_thread_exit_func, "stp x29, x30, [sp,#-16]!\n\t" "ldr x3, [x2, #0x2f0]\n\t" /* arm64_thread_data()->exit_frame */ "str xzr, [x2, #0x2f0]\n\t" "cbz x3, 1f\n\t" "mov sp, x3\n" "1:\tldp x29, x30, [sp], #16\n\t" "br x1" ) /*********************************************************************** * signal_exit_thread */ void signal_exit_thread( int status, void (*func)(int) ) { call_thread_exit_func( status, func, NtCurrentTeb() ); } /********************************************************************** * NtCurrentTeb (NTDLL.@) */ TEB * WINAPI NtCurrentTeb(void) { return pthread_getspecific( teb_key ); } #endif /* __aarch64__ */