/* * 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 #include #include #include #include #include #ifdef HAVE_UNISTD_H # include #endif #ifdef HAVE_MACHINE_SYSARCH_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 #ifdef __APPLE__ # 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 "wine/list.h" #include "ntdll_misc.h" #include "wine/debug.h" #ifdef HAVE_VALGRIND_MEMCHECK_H #include #endif WINE_DEFAULT_DEBUG_CHANNEL(seh); WINE_DECLARE_DEBUG_CHANNEL(relay); typedef struct _SCOPE_TABLE { ULONG Count; struct { ULONG BeginAddress; ULONG EndAddress; ULONG HandlerAddress; ULONG JumpTarget; } ScopeRecord[1]; } SCOPE_TABLE, *PSCOPE_TABLE; /* layering violation: the setjmp buffer is defined in msvcrt, but used by RtlUnwindEx */ struct MSVCRT_JUMP_BUFFER { ULONG64 Frame; ULONG64 Rbx; ULONG64 Rsp; ULONG64 Rbp; ULONG64 Rsi; ULONG64 Rdi; ULONG64 R12; ULONG64 R13; ULONG64 R14; ULONG64 R15; ULONG64 Rip; ULONG64 Spare; M128A Xmm6; M128A Xmm7; M128A Xmm8; M128A Xmm9; M128A Xmm10; M128A Xmm11; M128A Xmm12; M128A Xmm13; M128A Xmm14; M128A Xmm15; }; /*********************************************************************** * signal context platform-specific definitions */ #ifdef linux #include static inline int arch_prctl( int func, void *ptr ) { return syscall( __NR_arch_prctl, func, 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)) #elif defined(__FreeBSD__) || defined (__FreeBSD_kernel__) #define RAX_sig(context) ((context)->uc_mcontext.mc_rax) #define RBX_sig(context) ((context)->uc_mcontext.mc_rbx) #define RCX_sig(context) ((context)->uc_mcontext.mc_rcx) #define RDX_sig(context) ((context)->uc_mcontext.mc_rdx) #define RSI_sig(context) ((context)->uc_mcontext.mc_rsi) #define RDI_sig(context) ((context)->uc_mcontext.mc_rdi) #define RBP_sig(context) ((context)->uc_mcontext.mc_rbp) #define R8_sig(context) ((context)->uc_mcontext.mc_r8) #define R9_sig(context) ((context)->uc_mcontext.mc_r9) #define R10_sig(context) ((context)->uc_mcontext.mc_r10) #define R11_sig(context) ((context)->uc_mcontext.mc_r11) #define R12_sig(context) ((context)->uc_mcontext.mc_r12) #define R13_sig(context) ((context)->uc_mcontext.mc_r13) #define R14_sig(context) ((context)->uc_mcontext.mc_r14) #define R15_sig(context) ((context)->uc_mcontext.mc_r15) #define CS_sig(context) ((context)->uc_mcontext.mc_cs) #define DS_sig(context) ((context)->uc_mcontext.mc_ds) #define ES_sig(context) ((context)->uc_mcontext.mc_es) #define FS_sig(context) ((context)->uc_mcontext.mc_fs) #define GS_sig(context) ((context)->uc_mcontext.mc_gs) #define SS_sig(context) ((context)->uc_mcontext.mc_ss) #define EFL_sig(context) ((context)->uc_mcontext.mc_rflags) #define RIP_sig(context) ((context)->uc_mcontext.mc_rip) #define RSP_sig(context) ((context)->uc_mcontext.mc_rsp) #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno) #define ERROR_sig(context) ((context)->uc_mcontext.mc_err) #define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.mc_fpstate)) #elif defined(__NetBSD__) #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)) #elif defined (__APPLE__) #define RAX_sig(context) ((context)->uc_mcontext->__ss.__rax) #define RBX_sig(context) ((context)->uc_mcontext->__ss.__rbx) #define RCX_sig(context) ((context)->uc_mcontext->__ss.__rcx) #define RDX_sig(context) ((context)->uc_mcontext->__ss.__rdx) #define RSI_sig(context) ((context)->uc_mcontext->__ss.__rsi) #define RDI_sig(context) ((context)->uc_mcontext->__ss.__rdi) #define RBP_sig(context) ((context)->uc_mcontext->__ss.__rbp) #define R8_sig(context) ((context)->uc_mcontext->__ss.__r8) #define R9_sig(context) ((context)->uc_mcontext->__ss.__r9) #define R10_sig(context) ((context)->uc_mcontext->__ss.__r10) #define R11_sig(context) ((context)->uc_mcontext->__ss.__r11) #define R12_sig(context) ((context)->uc_mcontext->__ss.__r12) #define R13_sig(context) ((context)->uc_mcontext->__ss.__r13) #define R14_sig(context) ((context)->uc_mcontext->__ss.__r14) #define R15_sig(context) ((context)->uc_mcontext->__ss.__r15) #define CS_sig(context) ((context)->uc_mcontext->__ss.__cs) #define FS_sig(context) ((context)->uc_mcontext->__ss.__fs) #define GS_sig(context) ((context)->uc_mcontext->__ss.__gs) #define EFL_sig(context) ((context)->uc_mcontext->__ss.__rflags) #define RIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__rip)) #define RSP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__rsp)) #define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno) #define ERROR_sig(context) ((context)->uc_mcontext->__es.__err) #define FPU_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->__fs.__fpu_fcw) #else #error You must define the signal context functions for your platform #endif 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 */ }; static const size_t teb_size = 0x2000; /* we reserve two pages for the TEB */ static size_t signal_stack_size; typedef void (*raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context ); /* stack layout when calling an exception raise function */ struct stack_layout { CONTEXT context; EXCEPTION_RECORD rec; ULONG64 rsi; ULONG64 rdi; ULONG64 rbp; ULONG64 rip; ULONG64 red_zone[16]; }; typedef int (*wine_signal_handler)(unsigned int sig); static wine_signal_handler handlers[256]; struct amd64_thread_data { DWORD_PTR dr0; /* debug registers */ DWORD_PTR dr1; DWORD_PTR dr2; DWORD_PTR dr3; DWORD_PTR dr6; DWORD_PTR dr7; void *exit_frame; /* exit frame pointer */ }; C_ASSERT( sizeof(struct amd64_thread_data) <= sizeof(((TEB *)0)->SystemReserved2) ); C_ASSERT( offsetof( TEB, SystemReserved2 ) + offsetof( struct amd64_thread_data, exit_frame ) == 0x330 ); static inline struct amd64_thread_data *amd64_thread_data(void) { return (struct amd64_thread_data *)NtCurrentTeb()->SystemReserved2; } /*********************************************************************** * Definitions for Win32 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_EPILOG 6 #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; case UWOP_EPILOG: if (info->version == 2) { unsigned int offset; if (info->opcodes[i].info) offset = info->opcodes[i].offset; else offset = (info->opcodes[i+1].info << 8) + info->opcodes[i+1].offset; TRACE("epilog %p-%p\n", (char *)base + function->EndAddress - offset, (char *)base + function->EndAddress - offset + info->opcodes[i].offset ); i += 1; 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 ); } /*********************************************************************** * Definitions for Dwarf unwind tables */ enum dwarf_call_frame_info { DW_CFA_advance_loc = 0x40, DW_CFA_offset = 0x80, DW_CFA_restore = 0xc0, DW_CFA_nop = 0x00, DW_CFA_set_loc = 0x01, DW_CFA_advance_loc1 = 0x02, DW_CFA_advance_loc2 = 0x03, DW_CFA_advance_loc4 = 0x04, DW_CFA_offset_extended = 0x05, DW_CFA_restore_extended = 0x06, DW_CFA_undefined = 0x07, DW_CFA_same_value = 0x08, DW_CFA_register = 0x09, DW_CFA_remember_state = 0x0a, DW_CFA_restore_state = 0x0b, DW_CFA_def_cfa = 0x0c, DW_CFA_def_cfa_register = 0x0d, DW_CFA_def_cfa_offset = 0x0e, DW_CFA_def_cfa_expression = 0x0f, DW_CFA_expression = 0x10, DW_CFA_offset_extended_sf = 0x11, DW_CFA_def_cfa_sf = 0x12, DW_CFA_def_cfa_offset_sf = 0x13, DW_CFA_val_offset = 0x14, DW_CFA_val_offset_sf = 0x15, DW_CFA_val_expression = 0x16, }; enum dwarf_operation { DW_OP_addr = 0x03, DW_OP_deref = 0x06, DW_OP_const1u = 0x08, DW_OP_const1s = 0x09, DW_OP_const2u = 0x0a, DW_OP_const2s = 0x0b, DW_OP_const4u = 0x0c, DW_OP_const4s = 0x0d, DW_OP_const8u = 0x0e, DW_OP_const8s = 0x0f, DW_OP_constu = 0x10, DW_OP_consts = 0x11, DW_OP_dup = 0x12, DW_OP_drop = 0x13, DW_OP_over = 0x14, DW_OP_pick = 0x15, DW_OP_swap = 0x16, DW_OP_rot = 0x17, DW_OP_xderef = 0x18, DW_OP_abs = 0x19, DW_OP_and = 0x1a, DW_OP_div = 0x1b, DW_OP_minus = 0x1c, DW_OP_mod = 0x1d, DW_OP_mul = 0x1e, DW_OP_neg = 0x1f, DW_OP_not = 0x20, DW_OP_or = 0x21, DW_OP_plus = 0x22, DW_OP_plus_uconst = 0x23, DW_OP_shl = 0x24, DW_OP_shr = 0x25, DW_OP_shra = 0x26, DW_OP_xor = 0x27, DW_OP_bra = 0x28, DW_OP_eq = 0x29, DW_OP_ge = 0x2a, DW_OP_gt = 0x2b, DW_OP_le = 0x2c, DW_OP_lt = 0x2d, DW_OP_ne = 0x2e, DW_OP_skip = 0x2f, DW_OP_lit0 = 0x30, DW_OP_lit1 = 0x31, DW_OP_lit2 = 0x32, DW_OP_lit3 = 0x33, DW_OP_lit4 = 0x34, DW_OP_lit5 = 0x35, DW_OP_lit6 = 0x36, DW_OP_lit7 = 0x37, DW_OP_lit8 = 0x38, DW_OP_lit9 = 0x39, DW_OP_lit10 = 0x3a, DW_OP_lit11 = 0x3b, DW_OP_lit12 = 0x3c, DW_OP_lit13 = 0x3d, DW_OP_lit14 = 0x3e, DW_OP_lit15 = 0x3f, DW_OP_lit16 = 0x40, DW_OP_lit17 = 0x41, DW_OP_lit18 = 0x42, DW_OP_lit19 = 0x43, DW_OP_lit20 = 0x44, DW_OP_lit21 = 0x45, DW_OP_lit22 = 0x46, DW_OP_lit23 = 0x47, DW_OP_lit24 = 0x48, DW_OP_lit25 = 0x49, DW_OP_lit26 = 0x4a, DW_OP_lit27 = 0x4b, DW_OP_lit28 = 0x4c, DW_OP_lit29 = 0x4d, DW_OP_lit30 = 0x4e, DW_OP_lit31 = 0x4f, DW_OP_reg0 = 0x50, DW_OP_reg1 = 0x51, DW_OP_reg2 = 0x52, DW_OP_reg3 = 0x53, DW_OP_reg4 = 0x54, DW_OP_reg5 = 0x55, DW_OP_reg6 = 0x56, DW_OP_reg7 = 0x57, DW_OP_reg8 = 0x58, DW_OP_reg9 = 0x59, DW_OP_reg10 = 0x5a, DW_OP_reg11 = 0x5b, DW_OP_reg12 = 0x5c, DW_OP_reg13 = 0x5d, DW_OP_reg14 = 0x5e, DW_OP_reg15 = 0x5f, DW_OP_reg16 = 0x60, DW_OP_reg17 = 0x61, DW_OP_reg18 = 0x62, DW_OP_reg19 = 0x63, DW_OP_reg20 = 0x64, DW_OP_reg21 = 0x65, DW_OP_reg22 = 0x66, DW_OP_reg23 = 0x67, DW_OP_reg24 = 0x68, DW_OP_reg25 = 0x69, DW_OP_reg26 = 0x6a, DW_OP_reg27 = 0x6b, DW_OP_reg28 = 0x6c, DW_OP_reg29 = 0x6d, DW_OP_reg30 = 0x6e, DW_OP_reg31 = 0x6f, DW_OP_breg0 = 0x70, DW_OP_breg1 = 0x71, DW_OP_breg2 = 0x72, DW_OP_breg3 = 0x73, DW_OP_breg4 = 0x74, DW_OP_breg5 = 0x75, DW_OP_breg6 = 0x76, DW_OP_breg7 = 0x77, DW_OP_breg8 = 0x78, DW_OP_breg9 = 0x79, DW_OP_breg10 = 0x7a, DW_OP_breg11 = 0x7b, DW_OP_breg12 = 0x7c, DW_OP_breg13 = 0x7d, DW_OP_breg14 = 0x7e, DW_OP_breg15 = 0x7f, DW_OP_breg16 = 0x80, DW_OP_breg17 = 0x81, DW_OP_breg18 = 0x82, DW_OP_breg19 = 0x83, DW_OP_breg20 = 0x84, DW_OP_breg21 = 0x85, DW_OP_breg22 = 0x86, DW_OP_breg23 = 0x87, DW_OP_breg24 = 0x88, DW_OP_breg25 = 0x89, DW_OP_breg26 = 0x8a, DW_OP_breg27 = 0x8b, DW_OP_breg28 = 0x8c, DW_OP_breg29 = 0x8d, DW_OP_breg30 = 0x8e, DW_OP_breg31 = 0x8f, DW_OP_regx = 0x90, DW_OP_fbreg = 0x91, DW_OP_bregx = 0x92, DW_OP_piece = 0x93, DW_OP_deref_size = 0x94, DW_OP_xderef_size = 0x95, DW_OP_nop = 0x96, DW_OP_push_object_address = 0x97, DW_OP_call2 = 0x98, DW_OP_call4 = 0x99, DW_OP_call_ref = 0x9a, DW_OP_form_tls_address = 0x9b, DW_OP_call_frame_cfa = 0x9c, DW_OP_bit_piece = 0x9d, DW_OP_lo_user = 0xe0, DW_OP_hi_user = 0xff, DW_OP_GNU_push_tls_address = 0xe0, DW_OP_GNU_uninit = 0xf0, DW_OP_GNU_encoded_addr = 0xf1, }; #define DW_EH_PE_native 0x00 #define DW_EH_PE_leb128 0x01 #define DW_EH_PE_data2 0x02 #define DW_EH_PE_data4 0x03 #define DW_EH_PE_data8 0x04 #define DW_EH_PE_signed 0x08 #define DW_EH_PE_abs 0x00 #define DW_EH_PE_pcrel 0x10 #define DW_EH_PE_textrel 0x20 #define DW_EH_PE_datarel 0x30 #define DW_EH_PE_funcrel 0x40 #define DW_EH_PE_aligned 0x50 #define DW_EH_PE_indirect 0x80 #define DW_EH_PE_omit 0xff struct dwarf_eh_bases { void *tbase; void *dbase; void *func; }; struct dwarf_cie { unsigned int length; int id; unsigned char version; unsigned char augmentation[1]; }; struct dwarf_fde { unsigned int length; unsigned int cie_offset; }; extern const struct dwarf_fde *_Unwind_Find_FDE (void *, struct dwarf_eh_bases *); static unsigned char dwarf_get_u1( const unsigned char **p ) { return *(*p)++; } static unsigned short dwarf_get_u2( const unsigned char **p ) { unsigned int ret = (*p)[0] | ((*p)[1] << 8); (*p) += 2; return ret; } static unsigned int dwarf_get_u4( const unsigned char **p ) { unsigned int ret = (*p)[0] | ((*p)[1] << 8) | ((*p)[2] << 16) | ((*p)[3] << 24); (*p) += 4; return ret; } static ULONG64 dwarf_get_u8( const unsigned char **p ) { ULONG64 low = dwarf_get_u4( p ); ULONG64 high = dwarf_get_u4( p ); return low | (high << 32); } static ULONG_PTR dwarf_get_uleb128( const unsigned char **p ) { ULONG_PTR ret = 0; unsigned int shift = 0; unsigned char byte; do { byte = **p; ret |= (ULONG_PTR)(byte & 0x7f) << shift; shift += 7; (*p)++; } while (byte & 0x80); return ret; } static LONG_PTR dwarf_get_sleb128( const unsigned char **p ) { ULONG_PTR ret = 0; unsigned int shift = 0; unsigned char byte; do { byte = **p; ret |= (ULONG_PTR)(byte & 0x7f) << shift; shift += 7; (*p)++; } while (byte & 0x80); if ((shift < 8 * sizeof(ret)) && (byte & 0x40)) ret |= -((ULONG_PTR)1 << shift); return ret; } static ULONG_PTR dwarf_get_ptr( const unsigned char **p, unsigned char encoding ) { ULONG_PTR base; if (encoding == DW_EH_PE_omit) return 0; switch (encoding & 0xf0) { case DW_EH_PE_abs: base = 0; break; case DW_EH_PE_pcrel: base = (ULONG_PTR)*p; break; default: FIXME( "unsupported encoding %02x\n", encoding ); return 0; } switch (encoding & 0x0f) { case DW_EH_PE_native: return base + dwarf_get_u8( p ); case DW_EH_PE_leb128: return base + dwarf_get_uleb128( p ); case DW_EH_PE_data2: return base + dwarf_get_u2( p ); case DW_EH_PE_data4: return base + dwarf_get_u4( p ); case DW_EH_PE_data8: return base + dwarf_get_u8( p ); case DW_EH_PE_signed|DW_EH_PE_leb128: return base + dwarf_get_sleb128( p ); case DW_EH_PE_signed|DW_EH_PE_data2: return base + (signed short)dwarf_get_u2( p ); case DW_EH_PE_signed|DW_EH_PE_data4: return base + (signed int)dwarf_get_u4( p ); case DW_EH_PE_signed|DW_EH_PE_data8: return base + (LONG64)dwarf_get_u8( p ); default: FIXME( "unsupported encoding %02x\n", encoding ); return 0; } } enum reg_rule { RULE_UNSET, /* not set at all */ RULE_UNDEFINED, /* undefined value */ RULE_SAME, /* same value as previous frame */ RULE_CFA_OFFSET, /* stored at cfa offset */ RULE_OTHER_REG, /* stored in other register */ RULE_EXPRESSION, /* address specified by expression */ RULE_VAL_EXPRESSION /* value specified by expression */ }; #define NB_FRAME_REGS 41 #define MAX_SAVED_STATES 16 struct frame_state { ULONG_PTR cfa_offset; unsigned char cfa_reg; enum reg_rule cfa_rule; enum reg_rule rules[NB_FRAME_REGS]; ULONG64 regs[NB_FRAME_REGS]; }; struct frame_info { ULONG_PTR ip; ULONG_PTR code_align; LONG_PTR data_align; unsigned char retaddr_reg; unsigned char fde_encoding; unsigned char signal_frame; unsigned char state_sp; struct frame_state state; struct frame_state *state_stack; }; static const char *dwarf_reg_names[NB_FRAME_REGS] = { /* 0-7 */ "%rax", "%rdx", "%rcx", "%rbx", "%rsi", "%rdi", "%rbp", "%rsp", /* 8-16 */ "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", "%rip", /* 17-24 */ "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", /* 25-32 */ "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm12", "%xmm13", "%xmm14", "%xmm15", /* 33-40 */ "%st0", "%st1", "%st2", "%st3", "%st4", "%st5", "%st6", "%st7" }; static BOOL valid_reg( ULONG_PTR reg ) { if (reg >= NB_FRAME_REGS) FIXME( "unsupported reg %lx\n", reg ); return (reg < NB_FRAME_REGS); } static void execute_cfa_instructions( const unsigned char *ptr, const unsigned char *end, ULONG_PTR last_ip, struct frame_info *info ) { while (ptr < end && info->ip < last_ip + info->signal_frame) { enum dwarf_call_frame_info op = *ptr++; if (op & 0xc0) { switch (op & 0xc0) { case DW_CFA_advance_loc: { ULONG_PTR offset = (op & 0x3f) * info->code_align; TRACE( "%lx: DW_CFA_advance_loc %lu\n", info->ip, offset ); info->ip += offset; break; } case DW_CFA_offset: { ULONG_PTR reg = op & 0x3f; LONG_PTR offset = dwarf_get_uleb128( &ptr ) * info->data_align; if (!valid_reg( reg )) break; TRACE( "%lx: DW_CFA_offset %s, %ld\n", info->ip, dwarf_reg_names[reg], offset ); info->state.regs[reg] = offset; info->state.rules[reg] = RULE_CFA_OFFSET; break; } case DW_CFA_restore: { ULONG_PTR reg = op & 0x3f; if (!valid_reg( reg )) break; TRACE( "%lx: DW_CFA_restore %s\n", info->ip, dwarf_reg_names[reg] ); info->state.rules[reg] = RULE_UNSET; break; } } } else switch (op) { case DW_CFA_nop: break; case DW_CFA_set_loc: { ULONG_PTR loc = dwarf_get_ptr( &ptr, info->fde_encoding ); TRACE( "%lx: DW_CFA_set_loc %lx\n", info->ip, loc ); info->ip = loc; break; } case DW_CFA_advance_loc1: { ULONG_PTR offset = *ptr++ * info->code_align; TRACE( "%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset ); info->ip += offset; break; } case DW_CFA_advance_loc2: { ULONG_PTR offset = dwarf_get_u2( &ptr ) * info->code_align; TRACE( "%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset ); info->ip += offset; break; } case DW_CFA_advance_loc4: { ULONG_PTR offset = dwarf_get_u4( &ptr ) * info->code_align; TRACE( "%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset ); info->ip += offset; break; } case DW_CFA_offset_extended: case DW_CFA_offset_extended_sf: { ULONG_PTR reg = dwarf_get_uleb128( &ptr ); LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf_get_uleb128( &ptr ) * info->data_align : dwarf_get_sleb128( &ptr ) * info->data_align; if (!valid_reg( reg )) break; TRACE( "%lx: DW_CFA_offset_extended %s, %ld\n", info->ip, dwarf_reg_names[reg], offset ); info->state.regs[reg] = offset; info->state.rules[reg] = RULE_CFA_OFFSET; break; } case DW_CFA_restore_extended: { ULONG_PTR reg = dwarf_get_uleb128( &ptr ); if (!valid_reg( reg )) break; TRACE( "%lx: DW_CFA_restore_extended %s\n", info->ip, dwarf_reg_names[reg] ); info->state.rules[reg] = RULE_UNSET; break; } case DW_CFA_undefined: { ULONG_PTR reg = dwarf_get_uleb128( &ptr ); if (!valid_reg( reg )) break; TRACE( "%lx: DW_CFA_undefined %s\n", info->ip, dwarf_reg_names[reg] ); info->state.rules[reg] = RULE_UNDEFINED; break; } case DW_CFA_same_value: { ULONG_PTR reg = dwarf_get_uleb128( &ptr ); if (!valid_reg( reg )) break; TRACE( "%lx: DW_CFA_same_value %s\n", info->ip, dwarf_reg_names[reg] ); info->state.regs[reg] = reg; info->state.rules[reg] = RULE_SAME; break; } case DW_CFA_register: { ULONG_PTR reg = dwarf_get_uleb128( &ptr ); ULONG_PTR reg2 = dwarf_get_uleb128( &ptr ); if (!valid_reg( reg ) || !valid_reg( reg2 )) break; TRACE( "%lx: DW_CFA_register %s == %s\n", info->ip, dwarf_reg_names[reg], dwarf_reg_names[reg2] ); info->state.regs[reg] = reg2; info->state.rules[reg] = RULE_OTHER_REG; break; } case DW_CFA_remember_state: TRACE( "%lx: DW_CFA_remember_state\n", info->ip ); if (info->state_sp >= MAX_SAVED_STATES) FIXME( "%lx: DW_CFA_remember_state too many nested saves\n", info->ip ); else info->state_stack[info->state_sp++] = info->state; break; case DW_CFA_restore_state: TRACE( "%lx: DW_CFA_restore_state\n", info->ip ); if (!info->state_sp) FIXME( "%lx: DW_CFA_restore_state without corresponding save\n", info->ip ); else info->state = info->state_stack[--info->state_sp]; break; case DW_CFA_def_cfa: case DW_CFA_def_cfa_sf: { ULONG_PTR reg = dwarf_get_uleb128( &ptr ); ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf_get_uleb128( &ptr ) : dwarf_get_sleb128( &ptr ) * info->data_align; if (!valid_reg( reg )) break; TRACE( "%lx: DW_CFA_def_cfa %s, %lu\n", info->ip, dwarf_reg_names[reg], offset ); info->state.cfa_reg = reg; info->state.cfa_offset = offset; info->state.cfa_rule = RULE_CFA_OFFSET; break; } case DW_CFA_def_cfa_register: { ULONG_PTR reg = dwarf_get_uleb128( &ptr ); if (!valid_reg( reg )) break; TRACE( "%lx: DW_CFA_def_cfa_register %s\n", info->ip, dwarf_reg_names[reg] ); info->state.cfa_reg = reg; info->state.cfa_rule = RULE_CFA_OFFSET; break; } case DW_CFA_def_cfa_offset: case DW_CFA_def_cfa_offset_sf: { ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf_get_uleb128( &ptr ) : dwarf_get_sleb128( &ptr ) * info->data_align; TRACE( "%lx: DW_CFA_def_cfa_offset %lu\n", info->ip, offset ); info->state.cfa_offset = offset; info->state.cfa_rule = RULE_CFA_OFFSET; break; } case DW_CFA_def_cfa_expression: { ULONG_PTR expr = (ULONG_PTR)ptr; ULONG_PTR len = dwarf_get_uleb128( &ptr ); TRACE( "%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len ); info->state.cfa_offset = expr; info->state.cfa_rule = RULE_VAL_EXPRESSION; ptr += len; break; } case DW_CFA_expression: case DW_CFA_val_expression: { ULONG_PTR reg = dwarf_get_uleb128( &ptr ); ULONG_PTR expr = (ULONG_PTR)ptr; ULONG_PTR len = dwarf_get_uleb128( &ptr ); if (!valid_reg( reg )) break; TRACE( "%lx: DW_CFA_%sexpression %s %lx-%lx\n", info->ip, (op == DW_CFA_expression) ? "" : "val_", dwarf_reg_names[reg], expr, expr+len ); info->state.regs[reg] = expr; info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION; ptr += len; break; } default: FIXME( "%lx: unknown CFA opcode %02x\n", info->ip, op ); break; } } } /* retrieve a context register from its dwarf number */ static void *get_context_reg( CONTEXT *context, ULONG_PTR dw_reg ) { switch (dw_reg) { case 0: return &context->Rax; case 1: return &context->Rdx; case 2: return &context->Rcx; case 3: return &context->Rbx; case 4: return &context->Rsi; case 5: return &context->Rdi; case 6: return &context->Rbp; case 7: return &context->Rsp; case 8: return &context->R8; case 9: return &context->R9; case 10: return &context->R10; case 11: return &context->R11; case 12: return &context->R12; case 13: return &context->R13; case 14: return &context->R14; case 15: return &context->R15; case 16: return &context->Rip; case 17: return &context->u.s.Xmm0; case 18: return &context->u.s.Xmm1; case 19: return &context->u.s.Xmm2; case 20: return &context->u.s.Xmm3; case 21: return &context->u.s.Xmm4; case 22: return &context->u.s.Xmm5; case 23: return &context->u.s.Xmm6; case 24: return &context->u.s.Xmm7; case 25: return &context->u.s.Xmm8; case 26: return &context->u.s.Xmm9; case 27: return &context->u.s.Xmm10; case 28: return &context->u.s.Xmm11; case 29: return &context->u.s.Xmm12; case 30: return &context->u.s.Xmm13; case 31: return &context->u.s.Xmm14; case 32: return &context->u.s.Xmm15; case 33: return &context->u.s.Legacy[0]; case 34: return &context->u.s.Legacy[1]; case 35: return &context->u.s.Legacy[2]; case 36: return &context->u.s.Legacy[3]; case 37: return &context->u.s.Legacy[4]; case 38: return &context->u.s.Legacy[5]; case 39: return &context->u.s.Legacy[6]; case 40: return &context->u.s.Legacy[7]; default: return NULL; } } /* set a context register from its dwarf number */ static void set_context_reg( CONTEXT *context, ULONG_PTR dw_reg, void *val ) { switch (dw_reg) { case 0: context->Rax = *(ULONG64 *)val; break; case 1: context->Rdx = *(ULONG64 *)val; break; case 2: context->Rcx = *(ULONG64 *)val; break; case 3: context->Rbx = *(ULONG64 *)val; break; case 4: context->Rsi = *(ULONG64 *)val; break; case 5: context->Rdi = *(ULONG64 *)val; break; case 6: context->Rbp = *(ULONG64 *)val; break; case 7: context->Rsp = *(ULONG64 *)val; break; case 8: context->R8 = *(ULONG64 *)val; break; case 9: context->R9 = *(ULONG64 *)val; break; case 10: context->R10 = *(ULONG64 *)val; break; case 11: context->R11 = *(ULONG64 *)val; break; case 12: context->R12 = *(ULONG64 *)val; break; case 13: context->R13 = *(ULONG64 *)val; break; case 14: context->R14 = *(ULONG64 *)val; break; case 15: context->R15 = *(ULONG64 *)val; break; case 16: context->Rip = *(ULONG64 *)val; break; case 17: memcpy( &context->u.s.Xmm0, val, sizeof(M128A) ); break; case 18: memcpy( &context->u.s.Xmm1, val, sizeof(M128A) ); break; case 19: memcpy( &context->u.s.Xmm2, val, sizeof(M128A) ); break; case 20: memcpy( &context->u.s.Xmm3, val, sizeof(M128A) ); break; case 21: memcpy( &context->u.s.Xmm4, val, sizeof(M128A) ); break; case 22: memcpy( &context->u.s.Xmm5, val, sizeof(M128A) ); break; case 23: memcpy( &context->u.s.Xmm6, val, sizeof(M128A) ); break; case 24: memcpy( &context->u.s.Xmm7, val, sizeof(M128A) ); break; case 25: memcpy( &context->u.s.Xmm8, val, sizeof(M128A) ); break; case 26: memcpy( &context->u.s.Xmm9, val, sizeof(M128A) ); break; case 27: memcpy( &context->u.s.Xmm10, val, sizeof(M128A) ); break; case 28: memcpy( &context->u.s.Xmm11, val, sizeof(M128A) ); break; case 29: memcpy( &context->u.s.Xmm12, val, sizeof(M128A) ); break; case 30: memcpy( &context->u.s.Xmm13, val, sizeof(M128A) ); break; case 31: memcpy( &context->u.s.Xmm14, val, sizeof(M128A) ); break; case 32: memcpy( &context->u.s.Xmm15, val, sizeof(M128A) ); break; case 33: memcpy( &context->u.s.Legacy[0], val, sizeof(M128A) ); break; case 34: memcpy( &context->u.s.Legacy[1], val, sizeof(M128A) ); break; case 35: memcpy( &context->u.s.Legacy[2], val, sizeof(M128A) ); break; case 36: memcpy( &context->u.s.Legacy[3], val, sizeof(M128A) ); break; case 37: memcpy( &context->u.s.Legacy[4], val, sizeof(M128A) ); break; case 38: memcpy( &context->u.s.Legacy[5], val, sizeof(M128A) ); break; case 39: memcpy( &context->u.s.Legacy[6], val, sizeof(M128A) ); break; case 40: memcpy( &context->u.s.Legacy[7], val, sizeof(M128A) ); break; } } static ULONG_PTR eval_expression( const unsigned char *p, CONTEXT *context ) { ULONG_PTR reg, tmp, stack[64]; int sp = -1; ULONG_PTR len = dwarf_get_uleb128(&p); const unsigned char *end = p + len; while (p < end) { unsigned char opcode = dwarf_get_u1(&p); if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31) stack[++sp] = opcode - DW_OP_lit0; else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31) stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_reg0 ); else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31) stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_breg0 ) + dwarf_get_sleb128(&p); else switch (opcode) { case DW_OP_nop: break; case DW_OP_addr: stack[++sp] = dwarf_get_u8(&p); break; case DW_OP_const1u: stack[++sp] = dwarf_get_u1(&p); break; case DW_OP_const1s: stack[++sp] = (signed char)dwarf_get_u1(&p); break; case DW_OP_const2u: stack[++sp] = dwarf_get_u2(&p); break; case DW_OP_const2s: stack[++sp] = (short)dwarf_get_u2(&p); break; case DW_OP_const4u: stack[++sp] = dwarf_get_u4(&p); break; case DW_OP_const4s: stack[++sp] = (signed int)dwarf_get_u4(&p); break; case DW_OP_const8u: stack[++sp] = dwarf_get_u8(&p); break; case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf_get_u8(&p); break; case DW_OP_constu: stack[++sp] = dwarf_get_uleb128(&p); break; case DW_OP_consts: stack[++sp] = dwarf_get_sleb128(&p); break; case DW_OP_deref: stack[sp] = *(ULONG_PTR *)stack[sp]; break; case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break; case DW_OP_drop: sp--; break; case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break; case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf_get_u1(&p)]; sp++; break; case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break; case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break; case DW_OP_abs: stack[sp] = labs(stack[sp]); break; case DW_OP_neg: stack[sp] = -stack[sp]; break; case DW_OP_not: stack[sp] = ~stack[sp]; break; case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break; case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break; case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break; case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break; case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break; case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break; case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break; case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break; case DW_OP_plus_uconst: stack[sp] += dwarf_get_uleb128(&p); break; case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break; case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break; case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break; case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break; case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break; case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break; case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break; case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break; case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break; case DW_OP_skip: tmp = (short)dwarf_get_u2(&p); p += tmp; break; case DW_OP_bra: tmp = (short)dwarf_get_u2(&p); if (!stack[sp--]) p += tmp; break; case DW_OP_GNU_encoded_addr: tmp = *p++; stack[++sp] = dwarf_get_ptr( &p, tmp ); break; case DW_OP_regx: stack[++sp] = *(ULONG_PTR *)get_context_reg( context, dwarf_get_uleb128(&p) ); break; case DW_OP_bregx: reg = dwarf_get_uleb128(&p); tmp = dwarf_get_sleb128(&p); stack[++sp] = *(ULONG_PTR *)get_context_reg( context, reg ) + tmp; break; case DW_OP_deref_size: switch (*p++) { case 1: stack[sp] = *(unsigned char *)stack[sp]; break; case 2: stack[sp] = *(unsigned short *)stack[sp]; break; case 4: stack[sp] = *(unsigned int *)stack[sp]; break; case 8: stack[sp] = *(ULONG_PTR *)stack[sp]; break; } break; default: FIXME( "unhandled opcode %02x\n", opcode ); } } return stack[sp]; } /* apply the computed frame info to the actual context */ static void apply_frame_state( CONTEXT *context, struct frame_state *state ) { unsigned int i; ULONG_PTR cfa, value; CONTEXT new_context = *context; switch (state->cfa_rule) { case RULE_EXPRESSION: cfa = *(ULONG_PTR *)eval_expression( (const unsigned char *)state->cfa_offset, context ); break; case RULE_VAL_EXPRESSION: cfa = eval_expression( (const unsigned char *)state->cfa_offset, context ); break; default: cfa = *(ULONG_PTR *)get_context_reg( context, state->cfa_reg ) + state->cfa_offset; break; } if (!cfa) return; for (i = 0; i < NB_FRAME_REGS; i++) { switch (state->rules[i]) { case RULE_UNSET: case RULE_UNDEFINED: case RULE_SAME: break; case RULE_CFA_OFFSET: set_context_reg( &new_context, i, (char *)cfa + state->regs[i] ); break; case RULE_OTHER_REG: set_context_reg( &new_context, i, get_context_reg( context, state->regs[i] )); break; case RULE_EXPRESSION: value = eval_expression( (const unsigned char *)state->regs[i], context ); set_context_reg( &new_context, i, (void *)value ); break; case RULE_VAL_EXPRESSION: value = eval_expression( (const unsigned char *)state->regs[i], context ); set_context_reg( &new_context, i, &value ); break; } } new_context.Rsp = cfa; *context = new_context; } /*********************************************************************** * dwarf_virtual_unwind * * Equivalent of RtlVirtualUnwind for builtin modules. */ static NTSTATUS dwarf_virtual_unwind( ULONG64 ip, ULONG64 *frame,CONTEXT *context, const struct dwarf_fde *fde, const struct dwarf_eh_bases *bases, PEXCEPTION_ROUTINE *handler, void **handler_data ) { const struct dwarf_cie *cie; const unsigned char *ptr, *augmentation, *end; ULONG_PTR len, code_end; struct frame_info info; struct frame_state state_stack[MAX_SAVED_STATES]; int aug_z_format = 0; unsigned char lsda_encoding = DW_EH_PE_omit; memset( &info, 0, sizeof(info) ); info.state_stack = state_stack; info.ip = (ULONG_PTR)bases->func; *handler = NULL; cie = (const struct dwarf_cie *)((const char *)&fde->cie_offset - fde->cie_offset); /* parse the CIE first */ if (cie->version != 1 && cie->version != 3) { FIXME( "unknown CIE version %u at %p\n", cie->version, cie ); return STATUS_INVALID_DISPOSITION; } ptr = cie->augmentation + strlen((const char *)cie->augmentation) + 1; info.code_align = dwarf_get_uleb128( &ptr ); info.data_align = dwarf_get_sleb128( &ptr ); if (cie->version == 1) info.retaddr_reg = *ptr++; else info.retaddr_reg = dwarf_get_uleb128( &ptr ); info.state.cfa_rule = RULE_CFA_OFFSET; TRACE( "function %lx base %p cie %p len %x id %x version %x aug '%s' code_align %lu data_align %ld retaddr %s\n", ip, bases->func, cie, cie->length, cie->id, cie->version, cie->augmentation, info.code_align, info.data_align, dwarf_reg_names[info.retaddr_reg] ); end = NULL; for (augmentation = cie->augmentation; *augmentation; augmentation++) { switch (*augmentation) { case 'z': len = dwarf_get_uleb128( &ptr ); end = ptr + len; aug_z_format = 1; continue; case 'L': lsda_encoding = *ptr++; continue; case 'P': { unsigned char encoding = *ptr++; *handler = (void *)dwarf_get_ptr( &ptr, encoding ); continue; } case 'R': info.fde_encoding = *ptr++; continue; case 'S': info.signal_frame = 1; continue; } FIXME( "unknown augmentation '%c'\n", *augmentation ); if (!end) return STATUS_INVALID_DISPOSITION; /* cannot continue */ break; } if (end) ptr = end; end = (const unsigned char *)(&cie->length + 1) + cie->length; execute_cfa_instructions( ptr, end, ip, &info ); ptr = (const unsigned char *)(fde + 1); info.ip = dwarf_get_ptr( &ptr, info.fde_encoding ); /* fde code start */ code_end = info.ip + dwarf_get_ptr( &ptr, info.fde_encoding & 0x0f ); /* fde code length */ if (aug_z_format) /* get length of augmentation data */ { len = dwarf_get_uleb128( &ptr ); end = ptr + len; } else end = NULL; *handler_data = (void *)dwarf_get_ptr( &ptr, lsda_encoding ); if (end) ptr = end; end = (const unsigned char *)(&fde->length + 1) + fde->length; TRACE( "fde %p len %x personality %p lsda %p code %lx-%lx\n", fde, fde->length, *handler, *handler_data, info.ip, code_end ); execute_cfa_instructions( ptr, end, ip, &info ); *frame = context->Rsp; apply_frame_state( context, &info.state ); TRACE( "next function rip=%016lx\n", context->Rip ); 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 ); return STATUS_SUCCESS; } #ifdef HAVE_LIBUNWIND /*********************************************************************** * libunwind_set_cursor_from_context */ static int libunwind_set_cursor_from_context( unw_cursor_t *cursor, CONTEXT *context, ULONG64 ip ) { int rc; rc = unw_set_reg(cursor, UNW_REG_IP, ip); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_REG_SP, context->Rsp); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_RAX, context->Rax); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_RDX, context->Rdx); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_RCX, context->Rcx); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_RBX, context->Rbx); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_RSI, context->Rsi); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_RDI, context->Rdi); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_RBP, context->Rbp); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_R8, context->R8); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_R9, context->R9); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_R10, context->R10); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_R11, context->R11); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_R12, context->R12); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_R13, context->R13); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_R14, context->R14); if (rc == UNW_ESUCCESS) rc = unw_set_reg(cursor, UNW_X86_64_R15, context->R15); return rc; } /*********************************************************************** * libunwind_get_reg */ static int libunwind_get_reg( unw_cursor_t *cursor, unw_regnum_t reg, ULONG64 *val ) { int rc; unw_word_t word; rc = unw_get_reg(cursor, reg, &word); if (rc == UNW_ESUCCESS) *val = word; return rc; } /*********************************************************************** * libunwind_set_context_from_cursor */ static BOOL libunwind_set_context_from_cursor( CONTEXT *context, unw_cursor_t *cursor ) { int rc; rc = libunwind_get_reg(cursor, UNW_REG_IP, &context->Rip); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_REG_SP, &context->Rsp); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_RAX, &context->Rax); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_RDX, &context->Rdx); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_RCX, &context->Rcx); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_RBX, &context->Rbx); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_RSI, &context->Rsi); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_RDI, &context->Rdi); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_RBP, &context->Rbp); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_R8, &context->R8); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_R9, &context->R9); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_R10, &context->R10); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_R11, &context->R11); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_R12, &context->R12); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_R13, &context->R13); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_R14, &context->R14); if (rc == UNW_ESUCCESS) rc = libunwind_get_reg(cursor, UNW_X86_64_R15, &context->R15); return rc; } /*********************************************************************** * libunwind_virtual_unwind * * Equivalent of RtlVirtualUnwind for builtin modules. */ static NTSTATUS libunwind_virtual_unwind( ULONG64 ip, BOOL* got_info, ULONG64 *frame, CONTEXT *context, PEXCEPTION_ROUTINE *handler, void **handler_data ) { unw_context_t unw_context; unw_cursor_t cursor; unw_proc_info_t info; int rc; rc = unw_getcontext( &unw_context ); if (rc == UNW_ESUCCESS) rc = unw_init_local( &cursor, &unw_context ); if (rc == UNW_ESUCCESS) rc = libunwind_set_cursor_from_context( &cursor, context, ip - 1 ); 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 || info.end_ip <= ip || !info.format) { *got_info = FALSE; 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\n", rc ); return STATUS_INVALID_DISPOSITION; } *frame = context->Rsp; rc = libunwind_set_context_from_cursor( context, &cursor ); if (rc != UNW_ESUCCESS) { WARN( "failed to update context after unwind: %d\n", rc ); return STATUS_INVALID_DISPOSITION; } *handler = (void*)info.handler; *handler_data = (void*)info.lsda; *got_info = TRUE; TRACE( "next function rip=%016lx\n", context->Rip ); 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 ); return STATUS_SUCCESS; } #endif /*********************************************************************** * virtual_unwind */ static NTSTATUS virtual_unwind( ULONG type, DISPATCHER_CONTEXT *dispatch, CONTEXT *context ) { LDR_MODULE *module; NTSTATUS status; dispatch->ImageBase = 0; dispatch->ScopeIndex = 0; dispatch->ControlPc = context->Rip; /* first look for PE exception information */ if ((dispatch->FunctionEntry = lookup_function_info( context->Rip, &dispatch->ImageBase, &module ))) { dispatch->LanguageHandler = RtlVirtualUnwind( type, dispatch->ImageBase, context->Rip, dispatch->FunctionEntry, context, &dispatch->HandlerData, &dispatch->EstablisherFrame, NULL ); return STATUS_SUCCESS; } /* then look for host system exception information */ if (!module || (module->Flags & LDR_WINE_INTERNAL)) { BOOL got_info = FALSE; struct dwarf_eh_bases bases; const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(context->Rip - 1), &bases ); if (fde) { status = dwarf_virtual_unwind( context->Rip, &dispatch->EstablisherFrame, context, fde, &bases, &dispatch->LanguageHandler, &dispatch->HandlerData ); if (status != STATUS_SUCCESS) return status; got_info = TRUE; } #ifdef HAVE_LIBUNWIND else { status = libunwind_virtual_unwind( context->Rip, &got_info, &dispatch->EstablisherFrame, context, &dispatch->LanguageHandler, &dispatch->HandlerData ); if (status != STATUS_SUCCESS) return status; } #endif if (got_info) { if (dispatch->LanguageHandler && !module) { FIXME( "calling personality routine in system library not supported yet\n" ); dispatch->LanguageHandler = NULL; } return STATUS_SUCCESS; } } else WARN( "exception data not found in %s\n", debugstr_w(module->BaseDllName.Buffer) ); /* no exception information, treat as a leaf function */ dispatch->EstablisherFrame = context->Rsp; dispatch->LanguageHandler = NULL; context->Rip = *(ULONG64 *)context->Rsp; context->Rsp = context->Rsp + sizeof(ULONG64); return STATUS_SUCCESS; } /*********************************************************************** * dispatch_signal */ static inline int dispatch_signal(unsigned int sig) { if (handlers[sig] == NULL) return 0; return handlers[sig](sig); } /*********************************************************************** * get_signal_stack * * Get the base of the signal stack for the current thread. */ static inline void *get_signal_stack(void) { return (char *)NtCurrentTeb() + teb_size; } /*********************************************************************** * is_inside_signal_stack * * Check if pointer is inside the signal stack. */ static inline BOOL is_inside_signal_stack( void *ptr ) { return ((char *)ptr >= (char *)get_signal_stack() && (char *)ptr < (char *)get_signal_stack() + signal_stack_size); } /*********************************************************************** * 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_DEBUG_REGISTERS; 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->Dr0 = amd64_thread_data()->dr0; context->Dr1 = amd64_thread_data()->dr1; context->Dr2 = amd64_thread_data()->dr2; context->Dr3 = amd64_thread_data()->dr3; context->Dr6 = amd64_thread_data()->dr6; context->Dr7 = amd64_thread_data()->dr7; if (FPU_sig(sigcontext)) { context->ContextFlags |= CONTEXT_FLOATING_POINT; context->u.FltSave = *FPU_sig(sigcontext); context->MxCsr = context->u.FltSave.MxCsr; } } /*********************************************************************** * restore_context * * Build a sigcontext from the register values. */ static void restore_context( const CONTEXT *context, ucontext_t *sigcontext ) { amd64_thread_data()->dr0 = context->Dr0; amd64_thread_data()->dr1 = context->Dr1; amd64_thread_data()->dr2 = context->Dr2; amd64_thread_data()->dr3 = context->Dr3; amd64_thread_data()->dr6 = context->Dr6; amd64_thread_data()->dr7 = context->Dr7; 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; } /************************************************************************** * __chkstk (NTDLL.@) * * Supposed to touch all the stack pages, but we shouldn't need that. */ __ASM_GLOBAL_FUNC( __chkstk, "ret" ); /*********************************************************************** * RtlCaptureContext (NTDLL.@) */ __ASM_GLOBAL_FUNC( RtlCaptureContext, "pushfq\n\t" __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t") "movl $0x001000f,0x30(%rcx)\n\t" /* context->ContextFlags */ "stmxcsr 0x34(%rcx)\n\t" /* context->MxCsr */ "movw %cs,0x38(%rcx)\n\t" /* context->SegCs */ "movw %ds,0x3a(%rcx)\n\t" /* context->SegDs */ "movw %es,0x3c(%rcx)\n\t" /* context->SegEs */ "movw %fs,0x3e(%rcx)\n\t" /* context->SegFs */ "movw %gs,0x40(%rcx)\n\t" /* context->SegGs */ "movw %ss,0x42(%rcx)\n\t" /* context->SegSs */ "popq 0x44(%rcx)\n\t" /* context->Eflags */ __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t") "movq %rax,0x78(%rcx)\n\t" /* context->Rax */ "movq %rcx,0x80(%rcx)\n\t" /* context->Rcx */ "movq %rdx,0x88(%rcx)\n\t" /* context->Rdx */ "movq %rbx,0x90(%rcx)\n\t" /* context->Rbx */ "leaq 8(%rsp),%rax\n\t" "movq %rax,0x98(%rcx)\n\t" /* context->Rsp */ "movq %rbp,0xa0(%rcx)\n\t" /* context->Rbp */ "movq %rsi,0xa8(%rcx)\n\t" /* context->Rsi */ "movq %rdi,0xb0(%rcx)\n\t" /* context->Rdi */ "movq %r8,0xb8(%rcx)\n\t" /* context->R8 */ "movq %r9,0xc0(%rcx)\n\t" /* context->R9 */ "movq %r10,0xc8(%rcx)\n\t" /* context->R10 */ "movq %r11,0xd0(%rcx)\n\t" /* context->R11 */ "movq %r12,0xd8(%rcx)\n\t" /* context->R12 */ "movq %r13,0xe0(%rcx)\n\t" /* context->R13 */ "movq %r14,0xe8(%rcx)\n\t" /* context->R14 */ "movq %r15,0xf0(%rcx)\n\t" /* context->R15 */ "movq (%rsp),%rax\n\t" "movq %rax,0xf8(%rcx)\n\t" /* context->Rip */ "fxsave 0x100(%rcx)\n\t" /* context->FtlSave */ "movdqa %xmm0,0x1a0(%rcx)\n\t" /* context->Xmm0 */ "movdqa %xmm1,0x1b0(%rcx)\n\t" /* context->Xmm1 */ "movdqa %xmm2,0x1c0(%rcx)\n\t" /* context->Xmm2 */ "movdqa %xmm3,0x1d0(%rcx)\n\t" /* context->Xmm3 */ "movdqa %xmm4,0x1e0(%rcx)\n\t" /* context->Xmm4 */ "movdqa %xmm5,0x1f0(%rcx)\n\t" /* context->Xmm5 */ "movdqa %xmm6,0x200(%rcx)\n\t" /* context->Xmm6 */ "movdqa %xmm7,0x210(%rcx)\n\t" /* context->Xmm7 */ "movdqa %xmm8,0x220(%rcx)\n\t" /* context->Xmm8 */ "movdqa %xmm9,0x230(%rcx)\n\t" /* context->Xmm9 */ "movdqa %xmm10,0x240(%rcx)\n\t" /* context->Xmm10 */ "movdqa %xmm11,0x250(%rcx)\n\t" /* context->Xmm11 */ "movdqa %xmm12,0x260(%rcx)\n\t" /* context->Xmm12 */ "movdqa %xmm13,0x270(%rcx)\n\t" /* context->Xmm13 */ "movdqa %xmm14,0x280(%rcx)\n\t" /* context->Xmm14 */ "movdqa %xmm15,0x290(%rcx)\n\t" /* context->Xmm15 */ "ret" ); /*********************************************************************** * set_full_cpu_context * * Set the new CPU context. */ extern void set_full_cpu_context( const CONTEXT *context ); __ASM_GLOBAL_FUNC( set_full_cpu_context, "subq $40,%rsp\n\t" __ASM_SEH(".seh_stackalloc 0x40\n\t") __ASM_SEH(".seh_endprologue\n\t") __ASM_CFI(".cfi_adjust_cfa_offset 40\n\t") "ldmxcsr 0x34(%rdi)\n\t" /* context->MxCsr */ "movw 0x38(%rdi),%ax\n\t" /* context->SegCs */ "movq %rax,8(%rsp)\n\t" "movw 0x42(%rdi),%ax\n\t" /* context->SegSs */ "movq %rax,32(%rsp)\n\t" "movq 0x44(%rdi),%rax\n\t" /* context->Eflags */ "movq %rax,16(%rsp)\n\t" "movq 0x80(%rdi),%rcx\n\t" /* context->Rcx */ "movq 0x88(%rdi),%rdx\n\t" /* context->Rdx */ "movq 0x90(%rdi),%rbx\n\t" /* context->Rbx */ "movq 0x98(%rdi),%rax\n\t" /* context->Rsp */ "movq %rax,24(%rsp)\n\t" "movq 0xa0(%rdi),%rbp\n\t" /* context->Rbp */ "movq 0xa8(%rdi),%rsi\n\t" /* context->Rsi */ "movq 0xb8(%rdi),%r8\n\t" /* context->R8 */ "movq 0xc0(%rdi),%r9\n\t" /* context->R9 */ "movq 0xc8(%rdi),%r10\n\t" /* context->R10 */ "movq 0xd0(%rdi),%r11\n\t" /* context->R11 */ "movq 0xd8(%rdi),%r12\n\t" /* context->R12 */ "movq 0xe0(%rdi),%r13\n\t" /* context->R13 */ "movq 0xe8(%rdi),%r14\n\t" /* context->R14 */ "movq 0xf0(%rdi),%r15\n\t" /* context->R15 */ "movq 0xf8(%rdi),%rax\n\t" /* context->Rip */ "movq %rax,(%rsp)\n\t" "fxrstor 0x100(%rdi)\n\t" /* context->FtlSave */ "movdqa 0x1a0(%rdi),%xmm0\n\t" /* context->Xmm0 */ "movdqa 0x1b0(%rdi),%xmm1\n\t" /* context->Xmm1 */ "movdqa 0x1c0(%rdi),%xmm2\n\t" /* context->Xmm2 */ "movdqa 0x1d0(%rdi),%xmm3\n\t" /* context->Xmm3 */ "movdqa 0x1e0(%rdi),%xmm4\n\t" /* context->Xmm4 */ "movdqa 0x1f0(%rdi),%xmm5\n\t" /* context->Xmm5 */ "movdqa 0x200(%rdi),%xmm6\n\t" /* context->Xmm6 */ "movdqa 0x210(%rdi),%xmm7\n\t" /* context->Xmm7 */ "movdqa 0x220(%rdi),%xmm8\n\t" /* context->Xmm8 */ "movdqa 0x230(%rdi),%xmm9\n\t" /* context->Xmm9 */ "movdqa 0x240(%rdi),%xmm10\n\t" /* context->Xmm10 */ "movdqa 0x250(%rdi),%xmm11\n\t" /* context->Xmm11 */ "movdqa 0x260(%rdi),%xmm12\n\t" /* context->Xmm12 */ "movdqa 0x270(%rdi),%xmm13\n\t" /* context->Xmm13 */ "movdqa 0x280(%rdi),%xmm14\n\t" /* context->Xmm14 */ "movdqa 0x290(%rdi),%xmm15\n\t" /* context->Xmm15 */ "movq 0x78(%rdi),%rax\n\t" /* context->Rax */ "movq 0xb0(%rdi),%rdi\n\t" /* context->Rdi */ "iretq" ); /*********************************************************************** * set_cpu_context * * Set the new CPU context. Used by NtSetContextThread. */ void DECLSPEC_HIDDEN set_cpu_context( const CONTEXT *context ) { DWORD flags = context->ContextFlags & ~CONTEXT_AMD64; if (flags & CONTEXT_DEBUG_REGISTERS) { amd64_thread_data()->dr0 = context->Dr0; amd64_thread_data()->dr1 = context->Dr1; amd64_thread_data()->dr2 = context->Dr2; amd64_thread_data()->dr3 = context->Dr3; amd64_thread_data()->dr6 = context->Dr6; amd64_thread_data()->dr7 = context->Dr7; } if (flags & CONTEXT_FULL) { if (!(flags & CONTEXT_CONTROL)) FIXME( "setting partial context (%x) not supported\n", flags ); else set_full_cpu_context( context ); } } /*********************************************************************** * 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_AMD64; /* get rid of CPU id */ if (flags & CONTEXT_CONTROL) ret |= SERVER_CTX_CONTROL; if (flags & CONTEXT_INTEGER) ret |= SERVER_CTX_INTEGER; if (flags & CONTEXT_SEGMENTS) ret |= SERVER_CTX_SEGMENTS; if (flags & CONTEXT_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT; if (flags & CONTEXT_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS; return ret; } /*********************************************************************** * copy_context * * Copy a register context according to the flags. */ static 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; } 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->MxCsr = from->MxCsr; 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; } 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; } 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) ); to->MxCsr = to->u.FltSave.MxCsr; } 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; } /*********************************************************************** * NtSetContextThread (NTDLL.@) * ZwSetContextThread (NTDLL.@) */ NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context ) { NTSTATUS ret = STATUS_SUCCESS; BOOL self = (handle == GetCurrentThread()); /* debug registers require a server call */ if (self && (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_AMD64))) self = (amd64_thread_data()->dr0 == context->Dr0 && amd64_thread_data()->dr1 == context->Dr1 && amd64_thread_data()->dr2 == context->Dr2 && amd64_thread_data()->dr3 == context->Dr3 && amd64_thread_data()->dr6 == context->Dr6 && amd64_thread_data()->dr7 == context->Dr7); 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) set_cpu_context( context ); return ret; } /*********************************************************************** * NtGetContextThread (NTDLL.@) * ZwGetContextThread (NTDLL.@) */ NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context ) { NTSTATUS ret; DWORD needed_flags; BOOL self = (handle == GetCurrentThread()); if (!context) return STATUS_INVALID_PARAMETER; needed_flags = context->ContextFlags; /* debug registers require a server call */ if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_AMD64)) self = FALSE; 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 ctx; RtlCaptureContext( &ctx ); copy_context( context, &ctx, ctx.ContextFlags & needed_flags ); context->ContextFlags |= ctx.ContextFlags & needed_flags; } /* update the cached version of the debug registers */ if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_AMD64)) { amd64_thread_data()->dr0 = context->Dr0; amd64_thread_data()->dr1 = context->Dr1; amd64_thread_data()->dr2 = context->Dr2; amd64_thread_data()->dr3 = context->Dr3; amd64_thread_data()->dr6 = context->Dr6; amd64_thread_data()->dr7 = context->Dr7; } } return STATUS_SUCCESS; } /*********************************************************************** * wow64_get_server_context_flags */ static unsigned int wow64_get_server_context_flags( DWORD flags ) { unsigned int ret = 0; flags &= ~WOW64_CONTEXT_i386; /* get rid of CPU id */ if (flags & WOW64_CONTEXT_CONTROL) ret |= SERVER_CTX_CONTROL; if (flags & WOW64_CONTEXT_INTEGER) ret |= SERVER_CTX_INTEGER; if (flags & WOW64_CONTEXT_SEGMENTS) ret |= SERVER_CTX_SEGMENTS; if (flags & WOW64_CONTEXT_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT; if (flags & WOW64_CONTEXT_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS; if (flags & WOW64_CONTEXT_EXTENDED_REGISTERS) ret |= SERVER_CTX_EXTENDED_REGISTERS; return ret; } /*********************************************************************** * wow64_context_from_server */ static NTSTATUS wow64_context_from_server( WOW64_CONTEXT *to, const context_t *from ) { if (from->cpu != CPU_x86) return STATUS_INVALID_PARAMETER; to->ContextFlags = WOW64_CONTEXT_i386; if (from->flags & SERVER_CTX_CONTROL) { to->ContextFlags |= WOW64_CONTEXT_CONTROL; to->Ebp = from->ctl.i386_regs.ebp; to->Esp = from->ctl.i386_regs.esp; to->Eip = from->ctl.i386_regs.eip; to->SegCs = from->ctl.i386_regs.cs; to->SegSs = from->ctl.i386_regs.ss; to->EFlags = from->ctl.i386_regs.eflags; } if (from->flags & SERVER_CTX_INTEGER) { to->ContextFlags |= WOW64_CONTEXT_INTEGER; to->Eax = from->integer.i386_regs.eax; to->Ebx = from->integer.i386_regs.ebx; to->Ecx = from->integer.i386_regs.ecx; to->Edx = from->integer.i386_regs.edx; to->Esi = from->integer.i386_regs.esi; to->Edi = from->integer.i386_regs.edi; } if (from->flags & SERVER_CTX_SEGMENTS) { to->ContextFlags |= WOW64_CONTEXT_SEGMENTS; to->SegDs = from->seg.i386_regs.ds; to->SegEs = from->seg.i386_regs.es; to->SegFs = from->seg.i386_regs.fs; to->SegGs = from->seg.i386_regs.gs; } if (from->flags & SERVER_CTX_FLOATING_POINT) { to->ContextFlags |= WOW64_CONTEXT_FLOATING_POINT; to->FloatSave.ControlWord = from->fp.i386_regs.ctrl; to->FloatSave.StatusWord = from->fp.i386_regs.status; to->FloatSave.TagWord = from->fp.i386_regs.tag; to->FloatSave.ErrorOffset = from->fp.i386_regs.err_off; to->FloatSave.ErrorSelector = from->fp.i386_regs.err_sel; to->FloatSave.DataOffset = from->fp.i386_regs.data_off; to->FloatSave.DataSelector = from->fp.i386_regs.data_sel; to->FloatSave.Cr0NpxState = from->fp.i386_regs.cr0npx; memcpy( to->FloatSave.RegisterArea, from->fp.i386_regs.regs, sizeof(to->FloatSave.RegisterArea) ); } if (from->flags & SERVER_CTX_DEBUG_REGISTERS) { to->ContextFlags |= WOW64_CONTEXT_DEBUG_REGISTERS; to->Dr0 = from->debug.i386_regs.dr0; to->Dr1 = from->debug.i386_regs.dr1; to->Dr2 = from->debug.i386_regs.dr2; to->Dr3 = from->debug.i386_regs.dr3; to->Dr6 = from->debug.i386_regs.dr6; to->Dr7 = from->debug.i386_regs.dr7; } if (from->flags & SERVER_CTX_EXTENDED_REGISTERS) { to->ContextFlags |= WOW64_CONTEXT_EXTENDED_REGISTERS; memcpy( to->ExtendedRegisters, from->ext.i386_regs, sizeof(to->ExtendedRegisters) ); } return STATUS_SUCCESS; } /*********************************************************************** * wow64_context_to_server */ static void wow64_context_to_server( context_t *to, const WOW64_CONTEXT *from ) { DWORD flags = from->ContextFlags & ~WOW64_CONTEXT_i386; /* get rid of CPU id */ memset( to, 0, sizeof(*to) ); to->cpu = CPU_x86; if (flags & WOW64_CONTEXT_CONTROL) { to->flags |= SERVER_CTX_CONTROL; to->ctl.i386_regs.ebp = from->Ebp; to->ctl.i386_regs.esp = from->Esp; to->ctl.i386_regs.eip = from->Eip; to->ctl.i386_regs.cs = from->SegCs; to->ctl.i386_regs.ss = from->SegSs; to->ctl.i386_regs.eflags = from->EFlags; } if (flags & WOW64_CONTEXT_INTEGER) { to->flags |= SERVER_CTX_INTEGER; to->integer.i386_regs.eax = from->Eax; to->integer.i386_regs.ebx = from->Ebx; to->integer.i386_regs.ecx = from->Ecx; to->integer.i386_regs.edx = from->Edx; to->integer.i386_regs.esi = from->Esi; to->integer.i386_regs.edi = from->Edi; } if (flags & WOW64_CONTEXT_SEGMENTS) { to->flags |= SERVER_CTX_SEGMENTS; to->seg.i386_regs.ds = from->SegDs; to->seg.i386_regs.es = from->SegEs; to->seg.i386_regs.fs = from->SegFs; to->seg.i386_regs.gs = from->SegGs; } if (flags & WOW64_CONTEXT_FLOATING_POINT) { to->flags |= SERVER_CTX_FLOATING_POINT; to->fp.i386_regs.ctrl = from->FloatSave.ControlWord; to->fp.i386_regs.status = from->FloatSave.StatusWord; to->fp.i386_regs.tag = from->FloatSave.TagWord; to->fp.i386_regs.err_off = from->FloatSave.ErrorOffset; to->fp.i386_regs.err_sel = from->FloatSave.ErrorSelector; to->fp.i386_regs.data_off = from->FloatSave.DataOffset; to->fp.i386_regs.data_sel = from->FloatSave.DataSelector; to->fp.i386_regs.cr0npx = from->FloatSave.Cr0NpxState; memcpy( to->fp.i386_regs.regs, from->FloatSave.RegisterArea, sizeof(to->fp.i386_regs.regs) ); } if (flags & WOW64_CONTEXT_DEBUG_REGISTERS) { to->flags |= SERVER_CTX_DEBUG_REGISTERS; to->debug.i386_regs.dr0 = from->Dr0; to->debug.i386_regs.dr1 = from->Dr1; to->debug.i386_regs.dr2 = from->Dr2; to->debug.i386_regs.dr3 = from->Dr3; to->debug.i386_regs.dr6 = from->Dr6; to->debug.i386_regs.dr7 = from->Dr7; } if (flags & WOW64_CONTEXT_EXTENDED_REGISTERS) { to->flags |= SERVER_CTX_EXTENDED_REGISTERS; memcpy( to->ext.i386_regs, from->ExtendedRegisters, sizeof(to->ext.i386_regs) ); } } /****************************************************************************** * RtlWow64GetThreadContext (NTDLL.@) */ NTSTATUS WINAPI RtlWow64GetThreadContext( HANDLE handle, WOW64_CONTEXT *context ) { BOOL self; NTSTATUS ret; context_t server_context; unsigned int server_flags = wow64_get_server_context_flags( context->ContextFlags ); if ((ret = get_thread_context( handle, &server_context, server_flags, &self ))) return ret; if (self) return STATUS_INVALID_PARAMETER; return wow64_context_from_server( context, &server_context ); } /****************************************************************************** * RtlWow64SetThreadContext (NTDLL.@) */ NTSTATUS WINAPI RtlWow64SetThreadContext( HANDLE handle, const WOW64_CONTEXT *context ) { BOOL self; context_t server_context; wow64_context_to_server( &server_context, context ); return set_thread_context( handle, &server_context, &self ); } static DWORD __cdecl nested_exception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame, CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher ) { if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) return ExceptionContinueSearch; /* FIXME */ return ExceptionNestedException; } /********************************************************************** * call_handler * * Call a single exception handler. * FIXME: Handle nested exceptions. */ static DWORD call_handler( EXCEPTION_RECORD *rec, CONTEXT *context, DISPATCHER_CONTEXT *dispatch ) { EXCEPTION_REGISTRATION_RECORD frame; DWORD res; frame.Handler = nested_exception_handler; __wine_push_frame( &frame ); TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n", dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch ); res = dispatch->LanguageHandler( rec, (void *)dispatch->EstablisherFrame, context, dispatch ); TRACE( "handler at %p returned %u\n", dispatch->LanguageHandler, res ); __wine_pop_frame( &frame ); return res; } /********************************************************************** * call_teb_handler * * Call a single exception handler from the TEB chain. * FIXME: Handle nested exceptions. */ static DWORD call_teb_handler( EXCEPTION_RECORD *rec, CONTEXT *context, DISPATCHER_CONTEXT *dispatch, EXCEPTION_REGISTRATION_RECORD *teb_frame ) { DWORD res; TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n", teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, dispatch ); res = teb_frame->Handler( rec, teb_frame, context, (EXCEPTION_REGISTRATION_RECORD**)dispatch ); TRACE( "handler at %p returned %u\n", teb_frame->Handler, res ); return res; } /********************************************************************** * call_stack_handlers * * Call the stack handlers chain. */ static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *orig_context ) { EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList; UNWIND_HISTORY_TABLE table; DISPATCHER_CONTEXT dispatch; CONTEXT context; NTSTATUS status; context = *orig_context; dispatch.TargetIp = 0; dispatch.ContextRecord = &context; dispatch.HistoryTable = &table; for (;;) { status = virtual_unwind( UNW_FLAG_EHANDLER, &dispatch, &context ); if (status != STATUS_SUCCESS) return status; unwind_done: if (!dispatch.EstablisherFrame) break; if ((dispatch.EstablisherFrame & 7) || dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit || dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase) { ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame, NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase ); rec->ExceptionFlags |= EH_STACK_INVALID; break; } if (dispatch.LanguageHandler) { switch (call_handler( rec, orig_context, &dispatch )) { case ExceptionContinueExecution: if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION; return STATUS_SUCCESS; case ExceptionContinueSearch: break; case ExceptionNestedException: FIXME( "nested exception\n" ); break; case ExceptionCollidedUnwind: { ULONG64 frame; context = *dispatch.ContextRecord; dispatch.ContextRecord = &context; RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase, dispatch.ControlPc, dispatch.FunctionEntry, &context, NULL, &frame, NULL ); goto unwind_done; } default: return STATUS_INVALID_DISPOSITION; } } /* hack: call wine handlers registered in the tib list */ else while ((ULONG64)teb_frame < context.Rsp) { TRACE( "found wine frame %p rsp %lx handler %p\n", teb_frame, context.Rsp, teb_frame->Handler ); dispatch.EstablisherFrame = (ULONG64)teb_frame; switch (call_teb_handler( rec, orig_context, &dispatch, teb_frame )) { case ExceptionContinueExecution: if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION; return STATUS_SUCCESS; case ExceptionContinueSearch: break; case ExceptionNestedException: FIXME( "nested exception\n" ); break; case ExceptionCollidedUnwind: { ULONG64 frame; context = *dispatch.ContextRecord; dispatch.ContextRecord = &context; RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase, dispatch.ControlPc, dispatch.FunctionEntry, &context, NULL, &frame, NULL ); teb_frame = teb_frame->Prev; goto unwind_done; } default: return STATUS_INVALID_DISPOSITION; } teb_frame = teb_frame->Prev; } if (context.Rsp == (ULONG64)NtCurrentTeb()->Tib.StackBase) break; } return STATUS_UNHANDLED_EXCEPTION; } 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]=%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 { 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 ); } /* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */ if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context->Rip--; if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION) goto done; if ((status = call_stack_handlers( rec, context )) == STATUS_SUCCESS) goto done; if (status != 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 ); } done: return NtSetContextThread( GetCurrentThread(), context ); } /******************************************************************* * NtRaiseException (NTDLL.@) */ NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance ) { NTSTATUS status; if (first_chance) { status = send_debug_event( rec, TRUE, context ); if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED) return NtSetContextThread( GetCurrentThread(), context ); } return raise_exception( rec, context, first_chance); } /********************************************************************** * raise_generic_exception * * Generic raise function for exceptions that don't need special treatment. */ static void raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *context ) { NTSTATUS status = NtRaiseException( rec, context, TRUE ); raise_status( status, rec ); } extern void raise_func_trampoline( EXCEPTION_RECORD *rec, CONTEXT *context, raise_func func ); __ASM_GLOBAL_FUNC( raise_func_trampoline, __ASM_CFI(".cfi_signal_frame\n\t") __ASM_CFI(".cfi_def_cfa %rbp,160\n\t") /* red zone + rip + rbp + rdi + rsi */ __ASM_CFI(".cfi_rel_offset %rip,24\n\t") __ASM_CFI(".cfi_rel_offset %rbp,16\n\t") __ASM_CFI(".cfi_rel_offset %rdi,8\n\t") __ASM_CFI(".cfi_rel_offset %rsi,0\n\t") "call *%rdx\n\t" "int $3") /*********************************************************************** * setup_exception * * Setup a proper stack frame for the raise function, and modify the * sigcontext so that the return from the signal handler will call * the raise function. */ static struct stack_layout *setup_exception( ucontext_t *sigcontext ) { struct stack_layout *stack; DWORD exception_code = 0; stack = (struct stack_layout *)(RSP_sig(sigcontext) & ~15); /* stack sanity checks */ if (is_inside_signal_stack( stack )) { ERR( "nested exception on signal stack in thread %04x eip %016lx esp %016lx stack %p-%p\n", GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext), (ULONG_PTR)RSP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase ); abort_thread(1); } if (stack - 1 > stack || /* check for overflow in subtraction */ (char *)stack <= (char *)NtCurrentTeb()->DeallocationStack || (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase) { WARN( "exception outside of stack limits in thread %04x eip %016lx esp %016lx stack %p-%p\n", GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext), (ULONG_PTR)RSP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase ); } else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->DeallocationStack + 4096) { /* stack overflow on last page, unrecoverable */ UINT diff = (char *)NtCurrentTeb()->DeallocationStack + 4096 - (char *)(stack - 1); ERR( "stack overflow %u bytes in thread %04x eip %016lx esp %016lx stack %p-%p-%p\n", diff, GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext), (ULONG_PTR)RSP_sig(sigcontext), NtCurrentTeb()->DeallocationStack, NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase ); abort_thread(1); } else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit) { /* stack access below stack limit, may be recoverable */ switch (virtual_handle_stack_fault( stack - 1 )) { case 0: /* not handled */ { UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)(stack - 1); ERR( "stack overflow %u bytes in thread %04x eip %016lx esp %016lx stack %p-%p-%p\n", diff, GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext), (ULONG_PTR)RSP_sig(sigcontext), NtCurrentTeb()->DeallocationStack, NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase ); abort_thread(1); } case -1: /* overflow */ exception_code = EXCEPTION_STACK_OVERFLOW; break; } } stack--; /* push the stack_layout structure */ #if defined(VALGRIND_MAKE_MEM_UNDEFINED) VALGRIND_MAKE_MEM_UNDEFINED(stack, sizeof(*stack)); #elif defined(VALGRIND_MAKE_WRITABLE) VALGRIND_MAKE_WRITABLE(stack, sizeof(*stack)); #endif stack->rec.ExceptionRecord = NULL; stack->rec.ExceptionCode = exception_code; stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE; stack->rec.ExceptionAddress = (void *)RIP_sig(sigcontext); stack->rec.NumberParameters = 0; save_context( &stack->context, sigcontext ); return stack; } static void setup_raise_exception( ucontext_t *sigcontext, struct stack_layout *stack ) { ULONG64 *rsp_ptr; NTSTATUS status; if (stack->rec.ExceptionCode == EXCEPTION_SINGLE_STEP) { /* when single stepping can't tell whether this is a hw bp or a * single step interrupt. try to avoid as much overhead as possible * and only do a server call if there is any hw bp enabled. */ if (!(stack->context.EFlags & 0x100) || (stack->context.Dr7 & 0xff)) { /* (possible) hardware breakpoint, fetch the debug registers */ DWORD saved_flags = stack->context.ContextFlags; stack->context.ContextFlags = CONTEXT_DEBUG_REGISTERS; NtGetContextThread(GetCurrentThread(), &stack->context); stack->context.ContextFlags |= saved_flags; /* restore flags */ } stack->context.EFlags &= ~0x100; /* clear single-step flag */ } status = send_debug_event( &stack->rec, TRUE, &stack->context ); if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED) { restore_context( &stack->context, sigcontext ); return; } /* store return address and %rbp without aligning, so that the offset is fixed */ rsp_ptr = (ULONG64 *)RSP_sig(sigcontext) - 16; *(--rsp_ptr) = stack->context.Rip; *(--rsp_ptr) = stack->context.Rbp; *(--rsp_ptr) = stack->context.Rdi; *(--rsp_ptr) = stack->context.Rsi; /* now modify the sigcontext to return to the raise function */ RIP_sig(sigcontext) = (ULONG_PTR)raise_func_trampoline; RDI_sig(sigcontext) = (ULONG_PTR)&stack->rec; RSI_sig(sigcontext) = (ULONG_PTR)&stack->context; RDX_sig(sigcontext) = (ULONG_PTR)raise_generic_exception; RBP_sig(sigcontext) = (ULONG_PTR)rsp_ptr; RSP_sig(sigcontext) = (ULONG_PTR)stack; /* clear single-step, direction, and align check flag */ EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000); } /*********************************************************************** * is_privileged_instr * * Check if the fault location is a privileged instruction. */ static inline DWORD is_privileged_instr( CONTEXT *context ) { BYTE instr[16]; unsigned int i, prefix_count = 0; unsigned int len = virtual_uninterrupted_read_memory( (BYTE *)context->Rip, instr, sizeof(instr) ); for (i = 0; i < len; i++) switch (instr[i]) { /* instruction prefixes */ case 0x2e: /* %cs: */ case 0x36: /* %ss: */ case 0x3e: /* %ds: */ case 0x26: /* %es: */ case 0x40: /* rex */ case 0x41: /* rex */ case 0x42: /* rex */ case 0x43: /* rex */ case 0x44: /* rex */ case 0x45: /* rex */ case 0x46: /* rex */ case 0x47: /* rex */ case 0x48: /* rex */ case 0x49: /* rex */ case 0x4a: /* rex */ case 0x4b: /* rex */ case 0x4c: /* rex */ case 0x4d: /* rex */ case 0x4e: /* rex */ case 0x4f: /* rex */ case 0x64: /* %fs: */ case 0x65: /* %gs: */ case 0x66: /* opcode size */ case 0x67: /* addr size */ case 0xf0: /* lock */ case 0xf2: /* repne */ case 0xf3: /* repe */ if (++prefix_count >= 15) return EXCEPTION_ILLEGAL_INSTRUCTION; continue; case 0x0f: /* extended instruction */ if (i == len - 1) return 0; switch (instr[i + 1]) { case 0x06: /* clts */ case 0x08: /* invd */ case 0x09: /* wbinvd */ case 0x20: /* mov crX, reg */ case 0x21: /* mov drX, reg */ case 0x22: /* mov reg, crX */ case 0x23: /* mov reg drX */ return EXCEPTION_PRIV_INSTRUCTION; } return 0; case 0x6c: /* insb (%dx) */ case 0x6d: /* insl (%dx) */ case 0x6e: /* outsb (%dx) */ case 0x6f: /* outsl (%dx) */ case 0xcd: /* int $xx */ case 0xe4: /* inb al,XX */ case 0xe5: /* in (e)ax,XX */ case 0xe6: /* outb XX,al */ case 0xe7: /* out XX,(e)ax */ case 0xec: /* inb (%dx),%al */ case 0xed: /* inl (%dx),%eax */ case 0xee: /* outb %al,(%dx) */ case 0xef: /* outl %eax,(%dx) */ case 0xf4: /* hlt */ case 0xfa: /* cli */ case 0xfb: /* sti */ return EXCEPTION_PRIV_INSTRUCTION; default: return 0; } return 0; } /*********************************************************************** * handle_interrupt * * Handle an interrupt. */ static inline BOOL handle_interrupt( ucontext_t *sigcontext, struct stack_layout *stack ) { switch (ERROR_sig(sigcontext) >> 3) { case 0x2c: stack->rec.ExceptionCode = STATUS_ASSERTION_FAILURE; break; case 0x2d: switch (stack->context.Rax) { case 1: /* BREAKPOINT_PRINT */ case 3: /* BREAKPOINT_LOAD_SYMBOLS */ case 4: /* BREAKPOINT_UNLOAD_SYMBOLS */ case 5: /* BREAKPOINT_COMMAND_STRING (>= Win2003) */ RIP_sig(sigcontext) += 3; return TRUE; } stack->context.Rip += 3; stack->rec.ExceptionCode = EXCEPTION_BREAKPOINT; stack->rec.ExceptionAddress = (void *)stack->context.Rip; stack->rec.NumberParameters = 1; stack->rec.ExceptionInformation[0] = stack->context.Rax; break; default: return FALSE; } setup_raise_exception( sigcontext, stack ); return TRUE; } /********************************************************************** * segv_handler * * Handler for SIGSEGV and related errors. */ static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { struct stack_layout *stack; ucontext_t *ucontext = sigcontext; /* check for page fault inside the thread stack */ if (TRAP_sig(ucontext) == TRAP_x86_PAGEFLT) { switch (virtual_handle_stack_fault( siginfo->si_addr )) { case 1: /* handled */ return; case -1: /* overflow */ stack = setup_exception( sigcontext ); stack->rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW; goto done; } } stack = setup_exception( sigcontext ); if (stack->rec.ExceptionCode == EXCEPTION_STACK_OVERFLOW) goto done; switch(TRAP_sig(ucontext)) { case TRAP_x86_OFLOW: /* Overflow exception */ stack->rec.ExceptionCode = EXCEPTION_INT_OVERFLOW; break; case TRAP_x86_BOUND: /* Bound range exception */ stack->rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED; break; case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */ stack->rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; break; case TRAP_x86_STKFLT: /* Stack fault */ stack->rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW; break; case TRAP_x86_SEGNPFLT: /* Segment not present exception */ case TRAP_x86_PROTFLT: /* General protection fault */ case TRAP_x86_UNKNOWN: /* Unknown fault code */ { WORD err = ERROR_sig(ucontext); if (!err && (stack->rec.ExceptionCode = is_privileged_instr( &stack->context ))) break; if ((err & 7) == 2 && handle_interrupt( ucontext, stack )) return; stack->rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION; stack->rec.NumberParameters = 2; stack->rec.ExceptionInformation[0] = 0; stack->rec.ExceptionInformation[1] = 0xffffffffffffffff; } break; case TRAP_x86_PAGEFLT: /* Page fault */ stack->rec.NumberParameters = 2; stack->rec.ExceptionInformation[0] = (ERROR_sig(ucontext) >> 1) & 0x09; stack->rec.ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr; if (!(stack->rec.ExceptionCode = virtual_handle_fault((void *)stack->rec.ExceptionInformation[1], stack->rec.ExceptionInformation[0], FALSE ))) return; break; case TRAP_x86_ALIGNFLT: /* Alignment check exception */ stack->rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT; break; default: ERR( "Got unexpected trap %ld\n", (ULONG_PTR)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 */ stack->rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; break; } done: setup_raise_exception( sigcontext, stack ); } /********************************************************************** * trap_handler * * Handler for SIGTRAP. */ static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { struct stack_layout *stack = setup_exception( sigcontext ); switch (siginfo->si_code) { case TRAP_TRACE: /* Single-step exception */ case 4 /* TRAP_HWBKPT */: /* Hardware breakpoint exception */ stack->rec.ExceptionCode = EXCEPTION_SINGLE_STEP; break; case TRAP_BRKPT: /* Breakpoint exception */ #ifdef SI_KERNEL case SI_KERNEL: #endif /* Check if this is actually icebp instruction */ if (((unsigned char *)stack->rec.ExceptionAddress)[-1] == 0xF1) { stack->rec.ExceptionCode = EXCEPTION_SINGLE_STEP; break; } stack->rec.ExceptionAddress = (char *)stack->rec.ExceptionAddress - 1; /* back up over the int3 instruction */ /* fall through */ default: stack->rec.ExceptionCode = EXCEPTION_BREAKPOINT; stack->rec.NumberParameters = 1; stack->rec.ExceptionInformation[0] = 0; break; } setup_raise_exception( sigcontext, stack ); } /********************************************************************** * fpe_handler * * Handler for SIGFPE. */ static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { struct stack_layout *stack = setup_exception( sigcontext ); switch (siginfo->si_code) { case FPE_FLTSUB: stack->rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED; break; case FPE_INTDIV: stack->rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO; break; case FPE_INTOVF: stack->rec.ExceptionCode = EXCEPTION_INT_OVERFLOW; break; case FPE_FLTDIV: stack->rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO; break; case FPE_FLTOVF: stack->rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW; break; case FPE_FLTUND: stack->rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW; break; case FPE_FLTRES: stack->rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT; break; case FPE_FLTINV: default: stack->rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION; break; } setup_raise_exception( sigcontext, stack ); } /********************************************************************** * int_handler * * Handler for SIGINT. */ static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { if (!dispatch_signal(SIGINT)) { struct stack_layout *stack = setup_exception( sigcontext ); stack->rec.ExceptionCode = CONTROL_C_EXIT; setup_raise_exception( sigcontext, stack ); } } /********************************************************************** * abrt_handler * * Handler for SIGABRT. */ static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { struct stack_layout *stack = setup_exception( sigcontext ); stack->rec.ExceptionCode = EXCEPTION_WINE_ASSERTION; stack->rec.ExceptionFlags = EH_NONCONTINUABLE; setup_raise_exception( sigcontext, stack ); } /********************************************************************** * 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 ); } /*********************************************************************** * __wine_set_signal_handler (NTDLL.@) */ int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh) { if (sig >= ARRAY_SIZE(handlers)) 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_alignment; SIZE_T size; NTSTATUS status; if (!sigstack_alignment) { size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 ); /* find the first power of two not smaller than min_size */ sigstack_alignment = 12; while ((1u << sigstack_alignment) < min_size) sigstack_alignment++; signal_stack_size = (1 << sigstack_alignment) - teb_size; assert( sizeof(TEB) <= teb_size ); } size = 1 << sigstack_alignment; *teb = NULL; if (!(status = virtual_alloc_aligned( (void **)teb, 0, &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE, sigstack_alignment ))) { (*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 ); } #ifdef __APPLE__ /********************************************************************** * mac_thread_gsbase */ static void *mac_thread_gsbase(void) { struct thread_identifier_info tiinfo; unsigned int info_count = THREAD_IDENTIFIER_INFO_COUNT; static int gsbase_offset = -1; void *ret; kern_return_t kr = thread_info(mach_thread_self(), THREAD_IDENTIFIER_INFO, (thread_info_t) &tiinfo, &info_count); if (kr == KERN_SUCCESS) { TRACE("pthread_self() %p thread ID %llx gsbase %llx\n", pthread_self(), tiinfo.thread_id, tiinfo.thread_handle); return (void*)tiinfo.thread_handle; } if (gsbase_offset < 0) { /* Search for the array of TLS slots within the pthread data structure. That's what the macOS pthread implementation uses for gsbase. */ const void* const sentinel1 = (const void*)0x2bffb6b4f11228ae; const void* const sentinel2 = (const void*)0x0845a7ff6ab76707; int rc; pthread_key_t key; const void** p = (const void**)pthread_self(); int i; gsbase_offset = 0; if ((rc = pthread_key_create(&key, NULL))) { ERR("failed to create sentinel key for gsbase search: %d\n", rc); return NULL; } pthread_setspecific(key, sentinel1); for (i = key + 1; i < 2000; i++) /* arbitrary limit */ { if (p[i] == sentinel1) { pthread_setspecific(key, sentinel2); if (p[i] == sentinel2) { gsbase_offset = (i - key) * sizeof(*p); break; } pthread_setspecific(key, sentinel1); } } pthread_key_delete(key); } if (gsbase_offset) { ret = (char*)pthread_self() + gsbase_offset; TRACE("pthread_self() %p + offset 0x%08x -> gsbase %p\n", pthread_self(), gsbase_offset, ret); } else { ret = NULL; ERR("failed to locate gsbase; won't be able to poke ThreadLocalStoragePointer into pthread TLS; expect crashes\n"); } return ret; } #endif /********************************************************************** * signal_init_thread */ void signal_init_thread( TEB *teb ) { const WORD fpu_cw = 0x27f; stack_t ss; #if defined __linux__ arch_prctl( ARCH_SET_GS, teb ); #elif defined (__FreeBSD__) || defined (__FreeBSD_kernel__) amd64_set_gsbase( teb ); #elif defined(__NetBSD__) sysarch( X86_64_SET_GSBASE, &teb ); #elif defined (__APPLE__) __asm__ volatile (".byte 0x65\n\tmovq %0,%c1" : : "r" (teb->Tib.Self), "n" (FIELD_OFFSET(TEB, Tib.Self))); __asm__ volatile (".byte 0x65\n\tmovq %0,%c1" : : "r" (teb->ThreadLocalStoragePointer), "n" (FIELD_OFFSET(TEB, ThreadLocalStoragePointer))); /* alloc_tls_slot() needs to poke a value to an address relative to each thread's gsbase. Have each thread record its gsbase pointer into its TEB so alloc_tls_slot() can find it. */ teb->Reserved5[0] = mac_thread_gsbase(); #else # error Please define setting %gs for your architecture #endif ss.ss_sp = (char *)teb + teb_size; ss.ss_size = signal_stack_size; ss.ss_flags = 0; if (sigaltstack(&ss, NULL) == -1) perror( "sigaltstack" ); #ifdef __GNUC__ __asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw)); #else FIXME("FPU setup not implemented for this platform.\n"); #endif } /********************************************************************** * signal_init_process */ void signal_init_process(void) { struct sigaction sig_act; sig_act.sa_mask = server_block_set; sig_act.sa_flags = SA_RESTART | SA_SIGINFO | 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 = 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); } 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] = val; } 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->u.FloatingContext[reg] = val; } 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: case UWOP_EPILOG: return 2; case UWOP_SAVE_NONVOL_FAR: case UWOP_SAVE_XMM128_FAR: return 3; default: return 1; } } static BOOL is_inside_epilog( BYTE *pc, ULONG64 base, const RUNTIME_FUNCTION *function ) { /* 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 (;;) { if ((*pc & 0xf0) == 0x40) pc++; /* 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; case 0xe9: /* jmp nnnn */ pc += 5 + *(LONG *)(pc + 1); if (pc - (BYTE *)base >= function->BeginAddress && pc - (BYTE *)base < function->EndAddress) continue; break; case 0xeb: /* jmp n */ pc += 2 + (signed char)pc[1]; if (pc - (BYTE *)base >= function->BeginAddress && pc - (BYTE *)base < function->EndAddress) continue; break; case 0xf3: /* rep; ret (for amd64 prediction bug) */ return pc[1] == 0xc3; } 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 */ case 0xf3: /* rep; ret */ context->Rip = *(ULONG64 *)context->Rsp; context->Rsp += sizeof(ULONG64); return; case 0xe9: /* jmp nnnn */ pc += 5 + *(LONG *)(pc + 1); continue; case 0xeb: /* jmp n */ pc += 2 + (signed char)pc[1]; continue; } 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 && info->version != 2) { 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, base, function )) { 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; case UWOP_EPILOG: if (info->version == 2) break; /* nothing to do */ 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; } struct unwind_exception_frame { EXCEPTION_REGISTRATION_RECORD frame; DISPATCHER_CONTEXT *dispatch; }; /********************************************************************** * unwind_exception_handler * * Handler for exceptions happening while calling an unwind handler. */ static DWORD __cdecl unwind_exception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame, CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher ) { struct unwind_exception_frame *unwind_frame = (struct unwind_exception_frame *)frame; DISPATCHER_CONTEXT *dispatch = (DISPATCHER_CONTEXT *)dispatcher; /* copy the original dispatcher into the current one, except for the TargetIp */ dispatch->ControlPc = unwind_frame->dispatch->ControlPc; dispatch->ImageBase = unwind_frame->dispatch->ImageBase; dispatch->FunctionEntry = unwind_frame->dispatch->FunctionEntry; dispatch->EstablisherFrame = unwind_frame->dispatch->EstablisherFrame; dispatch->ContextRecord = unwind_frame->dispatch->ContextRecord; dispatch->LanguageHandler = unwind_frame->dispatch->LanguageHandler; dispatch->HandlerData = unwind_frame->dispatch->HandlerData; dispatch->HistoryTable = unwind_frame->dispatch->HistoryTable; dispatch->ScopeIndex = unwind_frame->dispatch->ScopeIndex; TRACE( "detected collided unwind\n" ); return ExceptionCollidedUnwind; } /********************************************************************** * call_unwind_handler * * Call a single unwind handler. */ static DWORD call_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch ) { struct unwind_exception_frame frame; DWORD res; frame.frame.Handler = unwind_exception_handler; frame.dispatch = dispatch; __wine_push_frame( &frame.frame ); TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n", dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch ); res = dispatch->LanguageHandler( rec, (void *)dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch ); TRACE( "handler %p returned %x\n", dispatch->LanguageHandler, res ); __wine_pop_frame( &frame.frame ); switch (res) { case ExceptionContinueSearch: case ExceptionCollidedUnwind: break; default: raise_status( STATUS_INVALID_DISPOSITION, rec ); break; } return res; } /********************************************************************** * call_teb_unwind_handler * * Call a single unwind handler from the TEB chain. */ static DWORD call_teb_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch, EXCEPTION_REGISTRATION_RECORD *teb_frame ) { DWORD res; TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n", teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, dispatch ); res = teb_frame->Handler( rec, teb_frame, dispatch->ContextRecord, (EXCEPTION_REGISTRATION_RECORD**)dispatch ); TRACE( "handler at %p returned %u\n", teb_frame->Handler, res ); switch (res) { case ExceptionContinueSearch: case ExceptionCollidedUnwind: break; default: raise_status( STATUS_INVALID_DISPOSITION, rec ); break; } return res; } /********************************************************************** * call_consolidate_callback * * Wrapper function to call a consolidate callback from a fake frame. * If the callback executes RtlUnwindEx (like for example done in C++ handlers), * we have to skip all frames which were already processed. To do that we * trick the unwinding functions into thinking the call came from somewhere * else. All CFI instructions are either DW_CFA_def_cfa_expression or * DW_CFA_expression, and the expressions have the following format: * * DW_OP_breg6; sleb128 0x10 | Load %rbp + 0x10 * DW_OP_deref | Get *(%rbp + 0x10) == context * DW_OP_plus_uconst; uleb128 | Add offset to get struct member * [DW_OP_deref] | Dereference, only for CFA */ extern void * WINAPI call_consolidate_callback( CONTEXT *context, void *(CALLBACK *callback)(EXCEPTION_RECORD *), EXCEPTION_RECORD *rec ); __ASM_GLOBAL_FUNC( call_consolidate_callback, "pushq %rbp\n\t" __ASM_SEH(".seh_pushreg %rbp\n\t") __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t") __ASM_CFI(".cfi_rel_offset %rbp,0\n\t") "movq %rsp,%rbp\n\t" __ASM_SEH(".seh_setframe %rbp,0\n\t") __ASM_CFI(".cfi_def_cfa_register %rbp\n\t") "subq $0x20,%rsp\n\t" __ASM_SEH(".seh_stackalloc 0x20\n\t") __ASM_SEH(".seh_endprologue\n\t") "movq %rcx,0x10(%rbp)\n\t" __ASM_CFI(".cfi_remember_state\n\t") __ASM_CFI(".cfi_escape 0x0f,0x07,0x76,0x10,0x06,0x23,0x98,0x01,0x06\n\t") /* CFA */ __ASM_CFI(".cfi_escape 0x10,0x03,0x06,0x76,0x10,0x06,0x23,0x90,0x01\n\t") /* %rbx */ __ASM_CFI(".cfi_escape 0x10,0x04,0x06,0x76,0x10,0x06,0x23,0xa8,0x01\n\t") /* %rsi */ __ASM_CFI(".cfi_escape 0x10,0x05,0x06,0x76,0x10,0x06,0x23,0xb0,0x01\n\t") /* %rdi */ __ASM_CFI(".cfi_escape 0x10,0x06,0x06,0x76,0x10,0x06,0x23,0xa0,0x01\n\t") /* %rbp */ __ASM_CFI(".cfi_escape 0x10,0x0c,0x06,0x76,0x10,0x06,0x23,0xd8,0x01\n\t") /* %r12 */ __ASM_CFI(".cfi_escape 0x10,0x0d,0x06,0x76,0x10,0x06,0x23,0xe0,0x01\n\t") /* %r13 */ __ASM_CFI(".cfi_escape 0x10,0x0e,0x06,0x76,0x10,0x06,0x23,0xe8,0x01\n\t") /* %r14 */ __ASM_CFI(".cfi_escape 0x10,0x0f,0x06,0x76,0x10,0x06,0x23,0xf0,0x01\n\t") /* %r15 */ __ASM_CFI(".cfi_escape 0x10,0x10,0x06,0x76,0x10,0x06,0x23,0xf8,0x01\n\t") /* %rip */ __ASM_CFI(".cfi_escape 0x10,0x17,0x06,0x76,0x10,0x06,0x23,0x80,0x04\n\t") /* %xmm6 */ __ASM_CFI(".cfi_escape 0x10,0x18,0x06,0x76,0x10,0x06,0x23,0x90,0x04\n\t") /* %xmm7 */ __ASM_CFI(".cfi_escape 0x10,0x19,0x06,0x76,0x10,0x06,0x23,0xa0,0x04\n\t") /* %xmm8 */ __ASM_CFI(".cfi_escape 0x10,0x1a,0x06,0x76,0x10,0x06,0x23,0xb0,0x04\n\t") /* %xmm9 */ __ASM_CFI(".cfi_escape 0x10,0x1b,0x06,0x76,0x10,0x06,0x23,0xc0,0x04\n\t") /* %xmm10 */ __ASM_CFI(".cfi_escape 0x10,0x1c,0x06,0x76,0x10,0x06,0x23,0xd0,0x04\n\t") /* %xmm11 */ __ASM_CFI(".cfi_escape 0x10,0x1d,0x06,0x76,0x10,0x06,0x23,0xe0,0x04\n\t") /* %xmm12 */ __ASM_CFI(".cfi_escape 0x10,0x1e,0x06,0x76,0x10,0x06,0x23,0xf0,0x04\n\t") /* %xmm13 */ __ASM_CFI(".cfi_escape 0x10,0x1f,0x06,0x76,0x10,0x06,0x23,0x80,0x05\n\t") /* %xmm14 */ __ASM_CFI(".cfi_escape 0x10,0x20,0x06,0x76,0x10,0x06,0x23,0x90,0x05\n\t") /* %xmm15 */ "movq %r8,%rcx\n\t" "callq *%rdx\n\t" __ASM_CFI(".cfi_restore_state\n\t") "leaq 0(%rbp),%rsp\n\t" __ASM_CFI(".cfi_def_cfa_register %rsp\n\t") "popq %rbp\n\t" __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t") __ASM_CFI(".cfi_same_value %rbp\n\t") "ret") /******************************************************************* * RtlRestoreContext (NTDLL.@) */ void WINAPI RtlRestoreContext( CONTEXT *context, EXCEPTION_RECORD *rec ) { EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList; if (rec && rec->ExceptionCode == STATUS_LONGJUMP && rec->NumberParameters >= 1) { struct MSVCRT_JUMP_BUFFER *jmp = (struct MSVCRT_JUMP_BUFFER *)rec->ExceptionInformation[0]; context->Rbx = jmp->Rbx; context->Rsp = jmp->Rsp; context->Rbp = jmp->Rbp; context->Rsi = jmp->Rsi; context->Rdi = jmp->Rdi; context->R12 = jmp->R12; context->R13 = jmp->R13; context->R14 = jmp->R14; context->R15 = jmp->R15; context->Rip = jmp->Rip; context->u.s.Xmm6 = jmp->Xmm6; context->u.s.Xmm7 = jmp->Xmm7; context->u.s.Xmm8 = jmp->Xmm8; context->u.s.Xmm9 = jmp->Xmm9; context->u.s.Xmm10 = jmp->Xmm10; context->u.s.Xmm11 = jmp->Xmm11; context->u.s.Xmm12 = jmp->Xmm12; context->u.s.Xmm13 = jmp->Xmm13; context->u.s.Xmm14 = jmp->Xmm14; context->u.s.Xmm15 = jmp->Xmm15; } else if (rec && rec->ExceptionCode == STATUS_UNWIND_CONSOLIDATE && rec->NumberParameters >= 1) { PVOID (CALLBACK *consolidate)(EXCEPTION_RECORD *) = (void *)rec->ExceptionInformation[0]; TRACE( "calling consolidate callback %p (rec=%p)\n", consolidate, rec ); context->Rip = (ULONG64)call_consolidate_callback( context, consolidate, rec ); } /* hack: remove no longer accessible TEB frames */ while ((ULONG64)teb_frame < context->Rsp) { TRACE( "removing TEB frame: %p\n", teb_frame ); teb_frame = __wine_pop_frame( teb_frame ); } TRACE( "returning to %lx stack %lx\n", context->Rip, context->Rsp ); set_cpu_context( context ); } /******************************************************************* * RtlUnwindEx (NTDLL.@) */ void WINAPI RtlUnwindEx( PVOID end_frame, PVOID target_ip, EXCEPTION_RECORD *rec, PVOID retval, CONTEXT *context, UNWIND_HISTORY_TABLE *table ) { EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList; EXCEPTION_RECORD record; DISPATCHER_CONTEXT dispatch; CONTEXT new_context; NTSTATUS status; DWORD i; RtlCaptureContext( context ); new_context = *context; /* 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); TRACE( "code=%x flags=%x end_frame=%p target_ip=%p rip=%016lx\n", rec->ExceptionCode, rec->ExceptionFlags, end_frame, target_ip, context->Rip ); for (i = 0; i < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); i++) TRACE( " info[%d]=%016lx\n", i, rec->ExceptionInformation[i] ); 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 ); dispatch.EstablisherFrame = context->Rsp; dispatch.TargetIp = (ULONG64)target_ip; dispatch.ContextRecord = context; dispatch.HistoryTable = table; for (;;) { status = virtual_unwind( UNW_FLAG_UHANDLER, &dispatch, &new_context ); if (status != STATUS_SUCCESS) raise_status( status, rec ); unwind_done: if (!dispatch.EstablisherFrame) break; if (is_inside_signal_stack( (void *)dispatch.EstablisherFrame )) { TRACE( "frame %lx is inside signal stack (%p-%p)\n", dispatch.EstablisherFrame, get_signal_stack(), (char *)get_signal_stack() + signal_stack_size ); *context = new_context; continue; } if ((dispatch.EstablisherFrame & 7) || dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit || dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase) { ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame, NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase ); rec->ExceptionFlags |= EH_STACK_INVALID; break; } if (dispatch.LanguageHandler) { if (end_frame && (dispatch.EstablisherFrame > (ULONG64)end_frame)) { ERR( "invalid end frame %lx/%p\n", dispatch.EstablisherFrame, end_frame ); raise_status( STATUS_INVALID_UNWIND_TARGET, rec ); } if (dispatch.EstablisherFrame == (ULONG64)end_frame) rec->ExceptionFlags |= EH_TARGET_UNWIND; if (call_unwind_handler( rec, &dispatch ) == ExceptionCollidedUnwind) { ULONG64 frame; *context = new_context = *dispatch.ContextRecord; dispatch.ContextRecord = context; RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase, dispatch.ControlPc, dispatch.FunctionEntry, &new_context, NULL, &frame, NULL ); rec->ExceptionFlags |= EH_COLLIDED_UNWIND; goto unwind_done; } rec->ExceptionFlags &= ~EH_COLLIDED_UNWIND; } else /* hack: call builtin handlers registered in the tib list */ { DWORD64 backup_frame = dispatch.EstablisherFrame; while ((ULONG64)teb_frame < new_context.Rsp && (ULONG64)teb_frame < (ULONG64)end_frame) { TRACE( "found builtin frame %p handler %p\n", teb_frame, teb_frame->Handler ); dispatch.EstablisherFrame = (ULONG64)teb_frame; if (call_teb_unwind_handler( rec, &dispatch, teb_frame ) == ExceptionCollidedUnwind) { ULONG64 frame; teb_frame = __wine_pop_frame( teb_frame ); *context = new_context = *dispatch.ContextRecord; dispatch.ContextRecord = context; RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase, dispatch.ControlPc, dispatch.FunctionEntry, &new_context, NULL, &frame, NULL ); rec->ExceptionFlags |= EH_COLLIDED_UNWIND; goto unwind_done; } teb_frame = __wine_pop_frame( teb_frame ); } if ((ULONG64)teb_frame == (ULONG64)end_frame && (ULONG64)end_frame < new_context.Rsp) break; dispatch.EstablisherFrame = backup_frame; } if (dispatch.EstablisherFrame == (ULONG64)end_frame) break; *context = new_context; } context->Rax = (ULONG64)retval; context->Rip = (ULONG64)target_ip; RtlRestoreContext(context, rec); } /******************************************************************* * RtlUnwind (NTDLL.@) */ void WINAPI RtlUnwind( void *frame, void *target_ip, EXCEPTION_RECORD *rec, void *retval ) { CONTEXT context; RtlUnwindEx( frame, target_ip, rec, retval, &context, NULL ); } /******************************************************************* * _local_unwind (NTDLL.@) */ void WINAPI _local_unwind( void *frame, void *target_ip ) { CONTEXT context; RtlUnwindEx( frame, target_ip, NULL, NULL, &context, NULL ); } /******************************************************************* * __C_specific_handler (NTDLL.@) */ EXCEPTION_DISPOSITION WINAPI __C_specific_handler( EXCEPTION_RECORD *rec, void *frame, CONTEXT *context, struct _DISPATCHER_CONTEXT *dispatch ) { SCOPE_TABLE *table = dispatch->HandlerData; ULONG i; TRACE( "%p %p %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)) { for (i = dispatch->ScopeIndex; i < table->Count; i++) { if (dispatch->ControlPc >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress && dispatch->ControlPc < dispatch->ImageBase + table->ScopeRecord[i].EndAddress) { PTERMINATION_HANDLER handler; if (table->ScopeRecord[i].JumpTarget) continue; if (rec->ExceptionFlags & EH_TARGET_UNWIND && dispatch->TargetIp >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress && dispatch->TargetIp < dispatch->ImageBase + table->ScopeRecord[i].EndAddress) { break; } handler = (PTERMINATION_HANDLER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress); dispatch->ScopeIndex = i+1; TRACE( "calling __finally %p frame %p\n", handler, frame ); handler( TRUE, frame ); } } return ExceptionContinueSearch; } for (i = dispatch->ScopeIndex; i < table->Count; i++) { if (dispatch->ControlPc >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress && dispatch->ControlPc < dispatch->ImageBase + table->ScopeRecord[i].EndAddress) { if (!table->ScopeRecord[i].JumpTarget) continue; if (table->ScopeRecord[i].HandlerAddress != EXCEPTION_EXECUTE_HANDLER) { EXCEPTION_POINTERS ptrs; PEXCEPTION_FILTER filter; filter = (PEXCEPTION_FILTER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress); ptrs.ExceptionRecord = rec; ptrs.ContextRecord = context; TRACE( "calling filter %p ptrs %p frame %p\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, (char *)dispatch->ImageBase + table->ScopeRecord[i].JumpTarget, rec, 0, dispatch->ContextRecord, dispatch->HistoryTable ); } } return ExceptionContinueSearch; } /*********************************************************************** * RtlRaiseException (NTDLL.@) */ __ASM_GLOBAL_FUNC( RtlRaiseException, "sub $0x4f8,%rsp\n\t" __ASM_SEH(".seh_stackalloc 0x4f8\n\t") __ASM_SEH(".seh_endprologue\n\t") __ASM_CFI(".cfi_adjust_cfa_offset 0x4f8\n\t") "movq %rcx,0x500(%rsp)\n\t" "leaq 0x20(%rsp),%rcx\n\t" "call " __ASM_NAME("RtlCaptureContext") "\n\t" "leaq 0x20(%rsp),%rdx\n\t" /* context pointer */ "leaq 0x500(%rsp),%rax\n\t" /* orig stack pointer */ "movq %rax,0x98(%rdx)\n\t" /* context->Rsp */ "movq (%rax),%rcx\n\t" /* original first parameter */ "movq %rcx,0x80(%rdx)\n\t" /* context->Rcx */ "movq 0x4f8(%rsp),%rax\n\t" /* return address */ "movq %rax,0xf8(%rdx)\n\t" /* context->Rip */ "movq %rax,0x10(%rcx)\n\t" /* rec->ExceptionAddress */ "movl $1,%r8d\n\t" "call " __ASM_NAME("NtRaiseException") "\n\t" "movq %rax,%rcx\n\t" "call " __ASM_NAME("RtlRaiseStatus") /* does not return */ ); static inline ULONG hash_pointers( void **ptrs, ULONG count ) { /* Based on MurmurHash2, which is in the public domain */ static const ULONG m = 0x5bd1e995; static const ULONG r = 24; ULONG hash = count * sizeof(void*); for (; count > 0; ptrs++, count--) { ULONG_PTR data = (ULONG_PTR)*ptrs; ULONG k1 = (ULONG)(data & 0xffffffff), k2 = (ULONG)(data >> 32); k1 *= m; k1 = (k1 ^ (k1 >> r)) * m; k2 *= m; k2 = (k2 ^ (k2 >> r)) * m; hash = (((hash * m) ^ k1) * m) ^ k2; } hash = (hash ^ (hash >> 13)) * m; return hash ^ (hash >> 15); } /************************************************************************* * RtlCaptureStackBackTrace (NTDLL.@) */ USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash ) { UNWIND_HISTORY_TABLE table; DISPATCHER_CONTEXT dispatch; CONTEXT context; NTSTATUS status; ULONG i; USHORT num_entries = 0; TRACE( "(%u, %u, %p, %p)\n", skip, count, buffer, hash ); RtlCaptureContext( &context ); dispatch.TargetIp = 0; dispatch.ContextRecord = &context; dispatch.HistoryTable = &table; if (hash) *hash = 0; for (i = 0; i < skip + count; i++) { status = virtual_unwind( UNW_FLAG_NHANDLER, &dispatch, &context ); if (status != STATUS_SUCCESS) return i; if (!dispatch.EstablisherFrame) break; if ((dispatch.EstablisherFrame & 7) || dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit || dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase) { ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame, NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase ); break; } if (context.Rsp == (ULONG64)NtCurrentTeb()->Tib.StackBase) break; if (i >= skip) buffer[num_entries++] = (void *)context.Rip; } if (hash && num_entries > 0) *hash = hash_pointers( buffer, num_entries ); TRACE( "captured %hu frames\n", num_entries ); return num_entries; } /*********************************************************************** * call_thread_func */ static void WINAPI call_thread_func( LPTHREAD_START_ROUTINE entry, void *arg ) { __TRY { TRACE_(relay)( "\1Starting thread proc %p (arg=%p)\n", entry, arg ); RtlExitUserThread( entry( arg )); } __EXCEPT(call_unhandled_exception_filter) { NtTerminateThread( GetCurrentThread(), GetExceptionCode() ); } __ENDTRY abort(); /* should not be reached */ } extern void DECLSPEC_NORETURN start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend, void *relay ); __ASM_GLOBAL_FUNC( start_thread, "subq $56,%rsp\n\t" __ASM_SEH(".seh_stackalloc 56\n\t") __ASM_SEH(".seh_endprologue\n\t") __ASM_CFI(".cfi_adjust_cfa_offset 56\n\t") "movq %rbp,48(%rsp)\n\t" __ASM_CFI(".cfi_rel_offset %rbp,48\n\t") "movq %rbx,40(%rsp)\n\t" __ASM_CFI(".cfi_rel_offset %rbx,40\n\t") "movq %r12,32(%rsp)\n\t" __ASM_CFI(".cfi_rel_offset %r12,32\n\t") "movq %r13,24(%rsp)\n\t" __ASM_CFI(".cfi_rel_offset %r13,24\n\t") "movq %r14,16(%rsp)\n\t" __ASM_CFI(".cfi_rel_offset %r14,16\n\t") "movq %r15,8(%rsp)\n\t" __ASM_CFI(".cfi_rel_offset %r15,8\n\t") /* store exit frame */ "movq %gs:0x30,%rax\n\t" "movq %rsp,0x330(%rax)\n\t" /* amd64_thread_data()->exit_frame */ /* switch to thread stack */ "movq 8(%rax),%rax\n\t" /* NtCurrentTeb()->Tib.StackBase */ "leaq -0x1000(%rax),%rsp\n\t" /* attach dlls */ "call " __ASM_NAME("attach_thread") "\n\t" "movq %rax,%rsp\n\t" /* clear the stack */ "andq $~0xfff,%rax\n\t" /* round down to page size */ "movq %rax,%rdi\n\t" "call " __ASM_NAME("virtual_clear_thread_stack") "\n\t" /* switch to the initial context */ "movq %rsp,%rdi\n\t" "call " __ASM_NAME("set_cpu_context") ) extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int) ); __ASM_GLOBAL_FUNC( call_thread_exit_func, /* fetch exit frame */ "movq %gs:0x30,%rax\n\t" "movq 0x330(%rax),%rdx\n\t" /* amd64_thread_data()->exit_frame */ "testq %rdx,%rdx\n\t" "jnz 1f\n\t" "jmp *%rsi\n" /* switch to exit frame stack */ "1:\tmovq $0,0x330(%rax)\n\t" "movq %rdx,%rsp\n\t" __ASM_CFI(".cfi_adjust_cfa_offset 56\n\t") __ASM_CFI(".cfi_rel_offset %rbp,48\n\t") __ASM_CFI(".cfi_rel_offset %rbx,40\n\t") __ASM_CFI(".cfi_rel_offset %r12,32\n\t") __ASM_CFI(".cfi_rel_offset %r13,24\n\t") __ASM_CFI(".cfi_rel_offset %r14,16\n\t") __ASM_CFI(".cfi_rel_offset %r15,8\n\t") "call *%rsi" ) /*********************************************************************** * init_thread_context */ static void init_thread_context( CONTEXT *context, LPTHREAD_START_ROUTINE entry, void *arg, void *relay ) { __asm__( "movw %%cs,%0" : "=m" (context->SegCs) ); __asm__( "movw %%ss,%0" : "=m" (context->SegSs) ); __asm__( "fxsave %0" : "=m" (context->u.FltSave) ); context->Rcx = (ULONG_PTR)entry; context->Rdx = (ULONG_PTR)arg; context->Rsp = (ULONG_PTR)NtCurrentTeb()->Tib.StackBase - 0x28; context->Rip = (ULONG_PTR)relay; context->EFlags = 0x200; } /*********************************************************************** * attach_thread */ PCONTEXT DECLSPEC_HIDDEN attach_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend, void *relay ) { CONTEXT *ctx; if (suspend) { CONTEXT context = { 0 }; context.ContextFlags = CONTEXT_ALL; init_thread_context( &context, entry, arg, relay ); wait_suspend( &context ); ctx = (CONTEXT *)((ULONG_PTR)context.Rsp & ~15) - 1; *ctx = context; } else { ctx = (CONTEXT *)((char *)NtCurrentTeb()->Tib.StackBase - 0x30) - 1; init_thread_context( ctx, entry, arg, relay ); } ctx->ContextFlags = CONTEXT_FULL; LdrInitializeThunk( ctx, (void **)&ctx->Rcx, 0, 0 ); return ctx; } /*********************************************************************** * signal_start_thread * * Thread startup sequence: * signal_start_thread() * -> start_thread() * -> call_thread_func() */ void signal_start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend ) { start_thread( entry, arg, suspend, call_thread_func ); } /********************************************************************** * signal_start_process * * Process startup sequence: * signal_start_process() * -> start_thread() * -> kernel32_start_process() */ void signal_start_process( LPTHREAD_START_ROUTINE entry, BOOL suspend ) { start_thread( entry, NtCurrentTeb()->Peb, suspend, kernel32_start_process ); } /*********************************************************************** * signal_exit_thread */ void signal_exit_thread( int status ) { call_thread_exit_func( status, exit_thread ); } /*********************************************************************** * signal_exit_process */ void signal_exit_process( int status ) { call_thread_exit_func( status, exit ); } /********************************************************************** * DbgBreakPoint (NTDLL.@) */ __ASM_STDCALL_FUNC( DbgBreakPoint, 0, "int $3; ret") /********************************************************************** * DbgUserBreakPoint (NTDLL.@) */ __ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "int $3; ret") #endif /* __x86_64__ */