/* * 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 */ #if 0 #pragma makedep unix #endif #ifdef __x86_64__ #include "config.h" #include "wine/port.h" #include #include #include #include #include #include #include #include #ifdef HAVE_UNISTD_H # include #endif #ifdef HAVE_MACHINE_SYSARCH_H # include #endif #ifdef HAVE_SYS_AUXV_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 "ddk/wdm.h" #include "wine/exception.h" #include "wine/list.h" #include "wine/asm.h" #include "unix_private.h" #include "wine/debug.h" WINE_DEFAULT_DEBUG_CHANNEL(unwind); WINE_DECLARE_DEBUG_CHANNEL(seh); /*********************************************************************** * signal context platform-specific definitions */ #ifdef linux #include static inline int arch_prctl( int func, void *ptr ) { return syscall( __NR_arch_prctl, func, ptr ); } extern int CDECL alloc_fs_sel( int sel, void *base ) DECLSPEC_HIDDEN; __ASM_GLOBAL_FUNC( alloc_fs_sel, /* switch to 32-bit stack */ "pushq %rbx\n\t" "pushq %rdi\n\t" "movq %rsp,%rdi\n\t" "movq %gs:0x8,%rsp\n\t" /* NtCurrentTeb()->Tib.StackBase */ "subl $0x10,%esp\n\t" /* setup modify_ldt struct on 32-bit stack */ "movl %ecx,(%rsp)\n\t" /* entry_number */ "movl %edx,4(%rsp)\n\t" /* base */ "movl $~0,8(%rsp)\n\t" /* limit */ "movl $0x41,12(%rsp)\n\t" /* seg_32bit | usable */ /* invoke 32-bit syscall */ "movl %esp,%ebx\n\t" "movl $0xf3,%eax\n\t" /* SYS_set_thread_area */ "int $0x80\n\t" /* restore stack */ "movl (%rsp),%eax\n\t" /* entry_number */ "movq %rdi,%rsp\n\t" "popq %rdi\n\t" "popq %rbx\n\t" "ret" ); #ifndef FP_XSTATE_MAGIC1 #define FP_XSTATE_MAGIC1 0x46505853 #endif #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)) #define XState_sig(fpu) (((unsigned int *)fpu->Reserved4)[12] == FP_XSTATE_MAGIC1 ? (XSTATE *)(fpu + 1) : NULL) #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)) #define XState_sig(context) NULL #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)) #define XState_sig(context) NULL #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) #define XState_sig(context) NULL #else #error You must define the signal context functions for your platform #endif enum i386_trap_code { 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 */ }; /* stack layout when calling an exception raise function */ struct stack_layout { CONTEXT context; CONTEXT_EX context_ex; EXCEPTION_RECORD rec; ULONG64 align; char xstate[0]; /* If xstate is present it is allocated * dynamically to provide 64 byte alignment. */ }; C_ASSERT((offsetof(struct stack_layout, xstate) == sizeof(struct stack_layout))); C_ASSERT( sizeof(XSTATE) == 0x140 ); C_ASSERT( sizeof(struct stack_layout) == 0x590 ); /* Should match the size in call_user_exception_dispatcher(). */ /* flags to control the behavior of the syscall dispatcher */ #define SYSCALL_HAVE_XSAVE 1 #define SYSCALL_HAVE_XSAVEC 2 #define SYSCALL_HAVE_PTHREAD_TEB 4 #define SYSCALL_HAVE_WRFSGSBASE 8 /* stack layout when calling an user apc function. * FIXME: match Windows ABI. */ struct apc_stack_layout { ULONG64 save_regs[4]; void *func; ULONG64 align; CONTEXT context; ULONG64 rbp; ULONG64 rip; }; struct syscall_frame { ULONG64 rax; /* 0000 */ ULONG64 rbx; /* 0008 */ ULONG64 rcx; /* 0010 */ ULONG64 rdx; /* 0018 */ ULONG64 rsi; /* 0020 */ ULONG64 rdi; /* 0028 */ ULONG64 r8; /* 0030 */ ULONG64 r9; /* 0038 */ ULONG64 r10; /* 0040 */ ULONG64 r11; /* 0048 */ ULONG64 r12; /* 0050 */ ULONG64 r13; /* 0058 */ ULONG64 r14; /* 0060 */ ULONG64 r15; /* 0068 */ ULONG64 rip; /* 0070 */ WORD cs; /* 0078 */ WORD ds; /* 007a */ WORD es; /* 007c */ WORD fs; /* 007e */ ULONG64 eflags; /* 0080 */ ULONG64 rsp; /* 0088 */ WORD ss; /* 0090 */ WORD gs; /* 0092 */ DWORD restore_flags; /* 0094 */ ULONG64 rbp; /* 0098 */ ULONG64 align[4]; /* 00a0 */ XMM_SAVE_AREA32 xsave; /* 00c0 */ XSTATE xstate; /* 02c0 */ }; C_ASSERT( sizeof( struct syscall_frame ) == 0x400); struct amd64_thread_data { DWORD_PTR dr0; /* 02f0 debug registers */ DWORD_PTR dr1; /* 02f8 */ DWORD_PTR dr2; /* 0300 */ DWORD_PTR dr3; /* 0308 */ DWORD_PTR dr6; /* 0310 */ DWORD_PTR dr7; /* 0318 */ void *exit_frame; /* 0320 exit frame pointer */ struct syscall_frame *syscall_frame; /* 0328 syscall frame pointer */ void *pthread_teb; /* 0330 thread data for pthread */ }; C_ASSERT( sizeof(struct amd64_thread_data) <= sizeof(((struct ntdll_thread_data *)0)->cpu_data) ); C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct amd64_thread_data, exit_frame ) == 0x320 ); C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct amd64_thread_data, syscall_frame ) == 0x328 ); C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct amd64_thread_data, pthread_teb ) == 0x330 ); static inline struct amd64_thread_data *amd64_thread_data(void) { return (struct amd64_thread_data *)ntdll_get_thread_data()->cpu_data; } static BOOL is_inside_syscall( ucontext_t *sigcontext ) { return ((char *)RSP_sig(sigcontext) >= (char *)ntdll_get_thread_data()->kernel_stack && (char *)RSP_sig(sigcontext) <= (char *)amd64_thread_data()->syscall_frame); } struct xcontext { CONTEXT c; CONTEXT_EX c_ex; ULONG64 host_compaction_mask; }; extern BOOL xstate_compaction_enabled DECLSPEC_HIDDEN; static inline XSTATE *xstate_from_context( const CONTEXT *context ) { CONTEXT_EX *xctx = (CONTEXT_EX *)(context + 1); if ((context->ContextFlags & CONTEXT_XSTATE) != CONTEXT_XSTATE) return NULL; return (XSTATE *)((char *)xctx + xctx->XState.Offset); } static inline void context_init_xstate( CONTEXT *context, void *xstate_buffer ) { CONTEXT_EX *xctx; xctx = (CONTEXT_EX *)(context + 1); xctx->Legacy.Length = sizeof(CONTEXT); xctx->Legacy.Offset = -(LONG)sizeof(CONTEXT); xctx->XState.Length = sizeof(XSTATE); xctx->XState.Offset = (BYTE *)xstate_buffer - (BYTE *)xctx; xctx->All.Length = sizeof(CONTEXT) + xctx->XState.Offset + xctx->XState.Length; xctx->All.Offset = -(LONG)sizeof(CONTEXT); context->ContextFlags |= CONTEXT_XSTATE; } static USHORT cs32_sel; /* selector for %cs in 32-bit mode */ static USHORT cs64_sel; /* selector for %cs in 64-bit mode */ static USHORT ds64_sel; /* selector for %ds/%es/%ss in 64-bit mode */ static USHORT fs32_sel; /* selector for %fs in 32-bit mode */ /*********************************************************************** * 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_uleb128 0x01 #define DW_EH_PE_udata2 0x02 #define DW_EH_PE_udata4 0x03 #define DW_EH_PE_udata8 0x04 #define DW_EH_PE_sleb128 0x09 #define DW_EH_PE_sdata2 0x0a #define DW_EH_PE_sdata4 0x0b #define DW_EH_PE_sdata8 0x0c #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, const struct dwarf_eh_bases *bases ) { ULONG_PTR base; if (encoding == DW_EH_PE_omit) return 0; switch (encoding & 0x70) { case DW_EH_PE_abs: base = 0; break; case DW_EH_PE_pcrel: base = (ULONG_PTR)*p; break; case DW_EH_PE_textrel: base = (ULONG_PTR)bases->tbase; break; case DW_EH_PE_datarel: base = (ULONG_PTR)bases->dbase; break; case DW_EH_PE_funcrel: base = (ULONG_PTR)bases->func; break; case DW_EH_PE_aligned: base = ((ULONG_PTR)*p + 7) & ~7ul; break; default: FIXME( "unsupported encoding %02x\n", encoding ); return 0; } switch (encoding & 0x0f) { case DW_EH_PE_native: base += dwarf_get_u8( p ); break; case DW_EH_PE_uleb128: base += dwarf_get_uleb128( p ); break; case DW_EH_PE_udata2: base += dwarf_get_u2( p ); break; case DW_EH_PE_udata4: base += dwarf_get_u4( p ); break; case DW_EH_PE_udata8: base += dwarf_get_u8( p ); break; case DW_EH_PE_sleb128: base += dwarf_get_sleb128( p ); break; case DW_EH_PE_sdata2: base += (signed short)dwarf_get_u2( p ); break; case DW_EH_PE_sdata4: base += (signed int)dwarf_get_u4( p ); break; case DW_EH_PE_sdata8: base += (LONG64)dwarf_get_u8( p ); break; default: FIXME( "unsupported encoding %02x\n", encoding ); return 0; } if (encoding & DW_EH_PE_indirect) base = *(ULONG_PTR *)base; return base; } 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, const struct dwarf_eh_bases *bases ) { 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, bases ); 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, const struct dwarf_eh_bases *bases ) { 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, bases ); 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, const struct dwarf_eh_bases *bases ) { 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, bases ); break; case RULE_VAL_EXPRESSION: cfa = eval_expression( (const unsigned char *)state->cfa_offset, context, bases ); 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, bases ); set_context_reg( &new_context, i, (void *)value ); break; case RULE_VAL_EXPRESSION: value = eval_expression( (const unsigned char *)state->regs[i], context, bases ); 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, bases ); 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, bases ); ptr = (const unsigned char *)(fde + 1); info.ip = dwarf_get_ptr( &ptr, info.fde_encoding, bases ); /* fde code start */ code_end = info.ip + dwarf_get_ptr( &ptr, info.fde_encoding & 0x0f, bases ); /* 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, bases ); 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, bases ); *frame = context->Rsp; apply_frame_state( context, &info.state, bases ); 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_virtual_unwind * * Equivalent of RtlVirtualUnwind for builtin modules. */ static NTSTATUS libunwind_virtual_unwind( ULONG64 ip, 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; #ifdef __APPLE__ rc = unw_getcontext( &unw_context ); if (rc == UNW_ESUCCESS) rc = unw_init_local( &cursor, &unw_context ); if (rc == UNW_ESUCCESS) { unw_set_reg( &cursor, UNW_REG_IP, context->Rip ); unw_set_reg( &cursor, UNW_REG_SP, context->Rsp ); unw_set_reg( &cursor, UNW_X86_64_RAX, context->Rax ); unw_set_reg( &cursor, UNW_X86_64_RDX, context->Rdx ); unw_set_reg( &cursor, UNW_X86_64_RCX, context->Rcx ); unw_set_reg( &cursor, UNW_X86_64_RBX, context->Rbx ); unw_set_reg( &cursor, UNW_X86_64_RSI, context->Rsi ); unw_set_reg( &cursor, UNW_X86_64_RDI, context->Rdi ); unw_set_reg( &cursor, UNW_X86_64_RBP, context->Rbp ); unw_set_reg( &cursor, UNW_X86_64_R8, context->R8 ); unw_set_reg( &cursor, UNW_X86_64_R9, context->R9 ); unw_set_reg( &cursor, UNW_X86_64_R10, context->R10 ); unw_set_reg( &cursor, UNW_X86_64_R11, context->R11 ); unw_set_reg( &cursor, UNW_X86_64_R12, context->R12 ); unw_set_reg( &cursor, UNW_X86_64_R13, context->R13 ); unw_set_reg( &cursor, UNW_X86_64_R14, context->R14 ); unw_set_reg( &cursor, UNW_X86_64_R15, context->R15 ); } #else RAX_sig(&unw_context) = context->Rax; RCX_sig(&unw_context) = context->Rcx; RDX_sig(&unw_context) = context->Rdx; RBX_sig(&unw_context) = context->Rbx; RSP_sig(&unw_context) = context->Rsp; RBP_sig(&unw_context) = context->Rbp; RSI_sig(&unw_context) = context->Rsi; RDI_sig(&unw_context) = context->Rdi; R8_sig(&unw_context) = context->R8; R9_sig(&unw_context) = context->R9; R10_sig(&unw_context) = context->R10; R11_sig(&unw_context) = context->R11; R12_sig(&unw_context) = context->R12; R13_sig(&unw_context) = context->R13; R14_sig(&unw_context) = context->R14; R15_sig(&unw_context) = context->R15; RIP_sig(&unw_context) = context->Rip; CS_sig(&unw_context) = context->SegCs; FS_sig(&unw_context) = context->SegFs; GS_sig(&unw_context) = context->SegGs; EFL_sig(&unw_context) = context->EFlags; rc = unw_init_local( &cursor, &unw_context ); #endif if (rc != UNW_ESUCCESS) { WARN( "setup failed: %d\n", rc ); return STATUS_INVALID_DISPOSITION; } *handler = NULL; *frame = context->Rsp; rc = unw_get_proc_info(&cursor, &info); if (rc != UNW_ESUCCESS && rc != UNW_ENOINFO) { WARN( "failed to get info: %d\n", rc ); return STATUS_INVALID_DISPOSITION; } if (rc == UNW_ENOINFO || ip < info.start_ip || ip > info.end_ip || info.end_ip == info.start_ip + 1) return STATUS_UNSUCCESSFUL; 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 ); if (!(rc = unw_step( &cursor ))) { WARN( "last frame\n" ); return STATUS_UNSUCCESSFUL; } if (rc < 0) { WARN( "failed to unwind: %d\n", rc ); return STATUS_INVALID_DISPOSITION; } unw_get_reg( &cursor, UNW_REG_IP, (unw_word_t *)&context->Rip ); unw_get_reg( &cursor, UNW_REG_SP, (unw_word_t *)&context->Rsp ); unw_get_reg( &cursor, UNW_X86_64_RAX, (unw_word_t *)&context->Rax ); unw_get_reg( &cursor, UNW_X86_64_RDX, (unw_word_t *)&context->Rdx ); unw_get_reg( &cursor, UNW_X86_64_RCX, (unw_word_t *)&context->Rcx ); unw_get_reg( &cursor, UNW_X86_64_RBX, (unw_word_t *)&context->Rbx ); unw_get_reg( &cursor, UNW_X86_64_RSI, (unw_word_t *)&context->Rsi ); unw_get_reg( &cursor, UNW_X86_64_RDI, (unw_word_t *)&context->Rdi ); unw_get_reg( &cursor, UNW_X86_64_RBP, (unw_word_t *)&context->Rbp ); unw_get_reg( &cursor, UNW_X86_64_R8, (unw_word_t *)&context->R8 ); unw_get_reg( &cursor, UNW_X86_64_R9, (unw_word_t *)&context->R9 ); unw_get_reg( &cursor, UNW_X86_64_R10, (unw_word_t *)&context->R10 ); unw_get_reg( &cursor, UNW_X86_64_R11, (unw_word_t *)&context->R11 ); unw_get_reg( &cursor, UNW_X86_64_R12, (unw_word_t *)&context->R12 ); unw_get_reg( &cursor, UNW_X86_64_R13, (unw_word_t *)&context->R13 ); unw_get_reg( &cursor, UNW_X86_64_R14, (unw_word_t *)&context->R14 ); unw_get_reg( &cursor, UNW_X86_64_R15, (unw_word_t *)&context->R15 ); *handler = (void*)info.handler; *handler_data = (void*)info.lsda; 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 /*********************************************************************** * unwind_builtin_dll */ NTSTATUS CDECL unwind_builtin_dll( ULONG type, DISPATCHER_CONTEXT *dispatch, CONTEXT *context ) { struct dwarf_eh_bases bases; const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(context->Rip - 1), &bases ); if (fde) return dwarf_virtual_unwind( context->Rip, &dispatch->EstablisherFrame, context, fde, &bases, &dispatch->LanguageHandler, &dispatch->HandlerData ); #ifdef HAVE_LIBUNWIND return libunwind_virtual_unwind( context->Rip, &dispatch->EstablisherFrame, context, &dispatch->LanguageHandler, &dispatch->HandlerData ); #endif return STATUS_UNSUCCESSFUL; } static inline void set_sigcontext( const CONTEXT *context, ucontext_t *sigcontext ) { RAX_sig(sigcontext) = context->Rax; RCX_sig(sigcontext) = context->Rcx; RDX_sig(sigcontext) = context->Rdx; RBX_sig(sigcontext) = context->Rbx; RSP_sig(sigcontext) = context->Rsp; RBP_sig(sigcontext) = context->Rbp; RSI_sig(sigcontext) = context->Rsi; RDI_sig(sigcontext) = context->Rdi; R8_sig(sigcontext) = context->R8; R9_sig(sigcontext) = context->R9; R10_sig(sigcontext) = context->R10; R11_sig(sigcontext) = context->R11; R12_sig(sigcontext) = context->R12; R13_sig(sigcontext) = context->R13; R14_sig(sigcontext) = context->R14; R15_sig(sigcontext) = context->R15; RIP_sig(sigcontext) = context->Rip; CS_sig(sigcontext) = context->SegCs; FS_sig(sigcontext) = context->SegFs; GS_sig(sigcontext) = context->SegGs; EFL_sig(sigcontext) = context->EFlags; #ifdef DS_sig DS_sig(sigcontext) = context->SegDs; #endif #ifdef ES_sig ES_sig(sigcontext) = context->SegEs; #endif #ifdef SS_sig SS_sig(sigcontext) = context->SegSs; #endif } /*********************************************************************** * init_handler */ static inline void init_handler( const ucontext_t *sigcontext ) { #ifdef __linux__ if (fs32_sel) arch_prctl( ARCH_SET_FS, amd64_thread_data()->pthread_teb ); #endif } /*********************************************************************** * leave_handler */ static inline void leave_handler( const ucontext_t *sigcontext ) { #ifdef __linux__ if (fs32_sel && !is_inside_signal_stack( (void *)RSP_sig(sigcontext ))) __asm__ volatile( "movw %0,%%fs" :: "r" (fs32_sel) ); #endif } /*********************************************************************** * save_context * * Set the register values from a sigcontext. */ static void save_context( struct xcontext *xcontext, const ucontext_t *sigcontext ) { CONTEXT *context = &xcontext->c; init_handler( 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)) { XSTATE *xs; context->ContextFlags |= CONTEXT_FLOATING_POINT; context->u.FltSave = *FPU_sig(sigcontext); context->MxCsr = context->u.FltSave.MxCsr; if ((cpu_info.ProcessorFeatureBits & CPU_FEATURE_AVX) && (xs = XState_sig(FPU_sig(sigcontext)))) { /* xcontext and sigcontext are both on the signal stack, so we can * just reference sigcontext without overflowing 32 bit XState.Offset */ context_init_xstate( context, xs ); assert( xcontext->c_ex.XState.Offset == (BYTE *)xs - (BYTE *)&xcontext->c_ex ); xcontext->host_compaction_mask = xs->CompactionMask; } } } /*********************************************************************** * restore_context * * Build a sigcontext from the register values. */ static void restore_context( const struct xcontext *xcontext, ucontext_t *sigcontext ) { const CONTEXT *context = &xcontext->c; XSTATE *xs; 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; set_sigcontext( context, sigcontext ); if (FPU_sig(sigcontext)) *FPU_sig(sigcontext) = context->u.FltSave; if ((cpu_info.ProcessorFeatureBits & CPU_FEATURE_AVX) && (xs = XState_sig(FPU_sig(sigcontext)))) xs->CompactionMask = xcontext->host_compaction_mask; leave_handler( sigcontext ); } /*********************************************************************** * signal_set_full_context */ NTSTATUS signal_set_full_context( CONTEXT *context ) { NTSTATUS status = NtSetContextThread( GetCurrentThread(), context ); if (!status && (context->ContextFlags & CONTEXT_INTEGER) == CONTEXT_INTEGER) amd64_thread_data()->syscall_frame->restore_flags |= CONTEXT_INTEGER; return status; } /*********************************************************************** * get_native_context */ void *get_native_context( CONTEXT *context ) { return context; } /*********************************************************************** * get_wow_context */ void *get_wow_context( CONTEXT *context ) { if (context->SegCs != cs64_sel) return NULL; return get_cpu_area( IMAGE_FILE_MACHINE_I386 ); } /*********************************************************************** * NtSetContextThread (NTDLL.@) * ZwSetContextThread (NTDLL.@) */ NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context ) { NTSTATUS ret = STATUS_SUCCESS; DWORD flags = context->ContextFlags & ~CONTEXT_AMD64; BOOL self = (handle == GetCurrentThread()); struct syscall_frame *frame = amd64_thread_data()->syscall_frame; if ((flags & CONTEXT_XSTATE) && (cpu_info.ProcessorFeatureBits & CPU_FEATURE_AVX)) { CONTEXT_EX *context_ex = (CONTEXT_EX *)(context + 1); XSTATE *xs = (XSTATE *)((char *)context_ex + context_ex->XState.Offset); if (context_ex->XState.Length < offsetof(XSTATE, YmmContext) || context_ex->XState.Length > sizeof(XSTATE)) return STATUS_INVALID_PARAMETER; if ((xs->Mask & XSTATE_MASK_GSSE) && (context_ex->XState.Length < sizeof(XSTATE))) return STATUS_BUFFER_OVERFLOW; } else flags &= ~CONTEXT_XSTATE; /* debug registers require a server call */ if (self && (flags & CONTEXT_DEBUG_REGISTERS)) 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) { ret = set_thread_context( handle, context, &self, IMAGE_FILE_MACHINE_AMD64 ); if (ret || !self) return ret; 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_INTEGER) { frame->rax = context->Rax; frame->rbx = context->Rbx; frame->rcx = context->Rcx; frame->rdx = context->Rdx; frame->rsi = context->Rsi; frame->rdi = context->Rdi; frame->r8 = context->R8; frame->r9 = context->R9; frame->r10 = context->R10; frame->r11 = context->R11; frame->r12 = context->R12; frame->r13 = context->R13; frame->r14 = context->R14; frame->r15 = context->R15; } if (flags & CONTEXT_CONTROL) { frame->rsp = context->Rsp; frame->rbp = context->Rbp; frame->rip = context->Rip; frame->eflags = context->EFlags; frame->cs = context->SegCs; frame->ss = context->SegSs; } if (flags & CONTEXT_SEGMENTS) { frame->ds = context->SegDs; frame->es = context->SegEs; frame->fs = context->SegFs; frame->gs = context->SegGs; } if (flags & CONTEXT_FLOATING_POINT) { frame->xsave = context->u.FltSave; frame->xstate.Mask |= XSTATE_MASK_LEGACY; } if (flags & CONTEXT_XSTATE) { CONTEXT_EX *context_ex = (CONTEXT_EX *)(context + 1); XSTATE *xs = (XSTATE *)((char *)context_ex + context_ex->XState.Offset); if (xs->Mask & XSTATE_MASK_GSSE) { frame->xstate.Mask |= XSTATE_MASK_GSSE; memcpy( &frame->xstate.YmmContext, &xs->YmmContext, sizeof(xs->YmmContext) ); } else frame->xstate.Mask &= ~XSTATE_MASK_GSSE; } frame->restore_flags |= flags & ~CONTEXT_INTEGER; return STATUS_SUCCESS; } /*********************************************************************** * NtGetContextThread (NTDLL.@) * ZwGetContextThread (NTDLL.@) */ NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context ) { struct syscall_frame *frame = amd64_thread_data()->syscall_frame; DWORD needed_flags = context->ContextFlags & ~CONTEXT_AMD64; BOOL self = (handle == GetCurrentThread()); /* debug registers require a server call */ if (needed_flags & CONTEXT_DEBUG_REGISTERS) self = FALSE; if (!self) { NTSTATUS ret = get_thread_context( handle, context, &self, IMAGE_FILE_MACHINE_AMD64 ); if (ret || !self) return ret; } if (needed_flags & CONTEXT_INTEGER) { context->Rax = frame->rax; context->Rbx = frame->rbx; context->Rcx = frame->rcx; context->Rdx = frame->rdx; context->Rsi = frame->rsi; context->Rdi = frame->rdi; context->R8 = frame->r8; context->R9 = frame->r9; context->R10 = frame->r10; context->R11 = frame->r11; context->R12 = frame->r12; context->R13 = frame->r13; context->R14 = frame->r14; context->R15 = frame->r15; context->ContextFlags |= CONTEXT_INTEGER; } if (needed_flags & CONTEXT_CONTROL) { context->Rsp = frame->rsp; context->Rbp = frame->rbp; context->Rip = frame->rip; context->EFlags = frame->eflags; context->SegCs = frame->cs; context->SegSs = frame->ss; context->ContextFlags |= CONTEXT_CONTROL; } if (needed_flags & CONTEXT_SEGMENTS) { context->SegDs = frame->ds; context->SegEs = frame->es; context->SegFs = frame->fs; context->SegGs = frame->gs; context->ContextFlags |= CONTEXT_SEGMENTS; } if (needed_flags & CONTEXT_FLOATING_POINT) { if (!xstate_compaction_enabled || (frame->xstate.Mask & XSTATE_MASK_LEGACY_FLOATING_POINT)) { memcpy( &context->u.FltSave, &frame->xsave, FIELD_OFFSET( XSAVE_FORMAT, MxCsr )); memcpy( context->u.FltSave.FloatRegisters, frame->xsave.FloatRegisters, sizeof( context->u.FltSave.FloatRegisters )); } else { memset( &context->u.FltSave, 0, FIELD_OFFSET( XSAVE_FORMAT, MxCsr )); memset( context->u.FltSave.FloatRegisters, 0, sizeof( context->u.FltSave.FloatRegisters )); context->u.FltSave.ControlWord = 0x37f; } if (!xstate_compaction_enabled || (frame->xstate.Mask & XSTATE_MASK_LEGACY_SSE)) { memcpy( context->u.FltSave.XmmRegisters, frame->xsave.XmmRegisters, sizeof( context->u.FltSave.XmmRegisters )); context->u.FltSave.MxCsr = frame->xsave.MxCsr; context->u.FltSave.MxCsr_Mask = frame->xsave.MxCsr_Mask; } else { memset( context->u.FltSave.XmmRegisters, 0, sizeof( context->u.FltSave.XmmRegisters )); context->u.FltSave.MxCsr = 0x1f80; context->u.FltSave.MxCsr_Mask = 0x2ffff; } context->MxCsr = context->u.FltSave.MxCsr; context->ContextFlags |= CONTEXT_FLOATING_POINT; } if ((needed_flags & CONTEXT_XSTATE) && (cpu_info.ProcessorFeatureBits & CPU_FEATURE_AVX)) { CONTEXT_EX *context_ex = (CONTEXT_EX *)(context + 1); XSTATE *xstate = (XSTATE *)((char *)context_ex + context_ex->XState.Offset); unsigned int mask; if (context_ex->XState.Length < offsetof(XSTATE, YmmContext) || context_ex->XState.Length > sizeof(XSTATE)) return STATUS_INVALID_PARAMETER; mask = (xstate_compaction_enabled ? xstate->CompactionMask : xstate->Mask) & XSTATE_MASK_GSSE; xstate->Mask = frame->xstate.Mask & mask; xstate->CompactionMask = xstate_compaction_enabled ? (0x8000000000000000 | mask) : 0; memset( xstate->Reserved, 0, sizeof(xstate->Reserved) ); if (xstate->Mask) { if (context_ex->XState.Length < sizeof(XSTATE)) return STATUS_BUFFER_OVERFLOW; memcpy( &xstate->YmmContext, &frame->xstate.YmmContext, sizeof(xstate->YmmContext) ); } } /* update the cached version of the debug registers */ if (needed_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; } return STATUS_SUCCESS; } /*********************************************************************** * set_thread_wow64_context */ NTSTATUS set_thread_wow64_context( HANDLE handle, const void *ctx, ULONG size ) { BOOL self = (handle == GetCurrentThread()); struct syscall_frame *frame = amd64_thread_data()->syscall_frame; I386_CONTEXT *wow_frame; const I386_CONTEXT *context = ctx; DWORD flags = context->ContextFlags & ~CONTEXT_i386; if (size != sizeof(I386_CONTEXT)) return STATUS_INFO_LENGTH_MISMATCH; /* debug registers require a server call */ if (self && (flags & CONTEXT_I386_DEBUG_REGISTERS)) 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) { NTSTATUS ret = set_thread_context( handle, context, &self, IMAGE_FILE_MACHINE_I386 ); if (ret || !self) return ret; if (flags & CONTEXT_I386_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_I386_DEBUG_REGISTERS)) return ret; } if (!(wow_frame = get_cpu_area( IMAGE_FILE_MACHINE_I386 ))) return STATUS_INVALID_PARAMETER; if (flags & CONTEXT_I386_INTEGER) { wow_frame->Eax = context->Eax; wow_frame->Ebx = context->Ebx; wow_frame->Ecx = context->Ecx; wow_frame->Edx = context->Edx; wow_frame->Esi = context->Esi; wow_frame->Edi = context->Edi; } if (flags & CONTEXT_I386_CONTROL) { WOW64_CPURESERVED *cpu = NtCurrentTeb()->TlsSlots[WOW64_TLS_CPURESERVED]; wow_frame->Esp = context->Esp; wow_frame->Ebp = context->Ebp; wow_frame->Eip = context->Eip; wow_frame->EFlags = context->EFlags; wow_frame->SegCs = cs32_sel; wow_frame->SegSs = ds64_sel; cpu->Flags |= WOW64_CPURESERVED_FLAG_RESET_STATE; } if (flags & CONTEXT_I386_SEGMENTS) { wow_frame->SegDs = ds64_sel; wow_frame->SegEs = ds64_sel; wow_frame->SegFs = fs32_sel; wow_frame->SegGs = ds64_sel; } if (flags & CONTEXT_I386_DEBUG_REGISTERS) { wow_frame->Dr0 = context->Dr0; wow_frame->Dr1 = context->Dr1; wow_frame->Dr2 = context->Dr2; wow_frame->Dr3 = context->Dr3; wow_frame->Dr6 = context->Dr6; wow_frame->Dr7 = context->Dr7; } if (flags & CONTEXT_I386_EXTENDED_REGISTERS) { memcpy( &frame->xsave, context->ExtendedRegisters, sizeof(frame->xsave) ); } else if (flags & CONTEXT_I386_FLOATING_POINT) { fpu_to_fpux( &frame->xsave, &context->FloatSave ); } if (flags & CONTEXT_I386_XSTATE) { CONTEXT_EX *context_ex = (CONTEXT_EX *)(context + 1); XSTATE *xs = (XSTATE *)((char *)context_ex + context_ex->XState.Offset); if (xs->Mask & XSTATE_MASK_GSSE) { frame->xstate.Mask |= XSTATE_MASK_GSSE; memcpy( &frame->xstate.YmmContext, &xs->YmmContext, sizeof(xs->YmmContext) ); } else frame->xstate.Mask &= ~XSTATE_MASK_GSSE; frame->restore_flags |= CONTEXT_XSTATE; } return STATUS_SUCCESS; } /*********************************************************************** * get_thread_wow64_context */ NTSTATUS get_thread_wow64_context( HANDLE handle, void *ctx, ULONG size ) { DWORD needed_flags; struct syscall_frame *frame = amd64_thread_data()->syscall_frame; I386_CONTEXT *wow_frame, *context = ctx; BOOL self = (handle == GetCurrentThread()); if (size != sizeof(I386_CONTEXT)) return STATUS_INFO_LENGTH_MISMATCH; needed_flags = context->ContextFlags & ~CONTEXT_i386; /* debug registers require a server call */ if (needed_flags & CONTEXT_I386_DEBUG_REGISTERS) self = FALSE; if (!self) { NTSTATUS ret = get_thread_context( handle, context, &self, IMAGE_FILE_MACHINE_I386 ); if (ret || !self) return ret; /* update the cached version of the debug registers */ if (needed_flags & CONTEXT_I386_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 (!(needed_flags & ~CONTEXT_I386_DEBUG_REGISTERS)) return ret; } if (!(wow_frame = get_cpu_area( IMAGE_FILE_MACHINE_I386 ))) return STATUS_INVALID_PARAMETER; if (needed_flags & CONTEXT_I386_INTEGER) { context->Eax = wow_frame->Eax; context->Ebx = wow_frame->Ebx; context->Ecx = wow_frame->Ecx; context->Edx = wow_frame->Edx; context->Esi = wow_frame->Esi; context->Edi = wow_frame->Edi; context->ContextFlags |= CONTEXT_I386_INTEGER; } if (needed_flags & CONTEXT_I386_CONTROL) { context->Esp = wow_frame->Esp; context->Ebp = wow_frame->Ebp; context->Eip = wow_frame->Eip; context->EFlags = wow_frame->EFlags; context->SegCs = wow_frame->SegCs; context->SegSs = wow_frame->SegSs; context->ContextFlags |= CONTEXT_I386_CONTROL; } if (needed_flags & CONTEXT_I386_SEGMENTS) { context->SegDs = wow_frame->SegDs; context->SegEs = wow_frame->SegEs; context->SegFs = wow_frame->SegFs; context->SegGs = wow_frame->SegGs; context->ContextFlags |= CONTEXT_I386_SEGMENTS; } if (needed_flags & CONTEXT_I386_EXTENDED_REGISTERS) { memcpy( context->ExtendedRegisters, &frame->xsave, sizeof(context->ExtendedRegisters) ); context->ContextFlags |= CONTEXT_I386_EXTENDED_REGISTERS; } if (needed_flags & CONTEXT_I386_FLOATING_POINT) { fpux_to_fpu( &context->FloatSave, &frame->xsave ); context->ContextFlags |= CONTEXT_I386_FLOATING_POINT; } if ((needed_flags & CONTEXT_I386_XSTATE) && (cpu_info.ProcessorFeatureBits & CPU_FEATURE_AVX)) { CONTEXT_EX *context_ex = (CONTEXT_EX *)(context + 1); XSTATE *xstate = (XSTATE *)((char *)context_ex + context_ex->XState.Offset); unsigned int mask; if (context_ex->XState.Length < offsetof(XSTATE, YmmContext) || context_ex->XState.Length > sizeof(XSTATE)) return STATUS_INVALID_PARAMETER; mask = (xstate_compaction_enabled ? xstate->CompactionMask : xstate->Mask) & XSTATE_MASK_GSSE; xstate->Mask = frame->xstate.Mask & mask; xstate->CompactionMask = xstate_compaction_enabled ? (0x8000000000000000 | mask) : 0; memset( xstate->Reserved, 0, sizeof(xstate->Reserved) ); if (xstate->Mask) { if (context_ex->XState.Length < sizeof(XSTATE)) return STATUS_BUFFER_OVERFLOW; memcpy( &xstate->YmmContext, &frame->xstate.YmmContext, sizeof(xstate->YmmContext) ); } } return STATUS_SUCCESS; } /*********************************************************************** * setup_raise_exception */ static void setup_raise_exception( ucontext_t *sigcontext, EXCEPTION_RECORD *rec, struct xcontext *xcontext ) { void *stack_ptr = (void *)(RSP_sig(sigcontext) & ~15); CONTEXT *context = &xcontext->c; struct stack_layout *stack; size_t stack_size; NTSTATUS status; XSTATE *src_xs; if (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 (!(context->EFlags & 0x100) || (context->Dr7 & 0xff)) { /* (possible) hardware breakpoint, fetch the debug registers */ DWORD saved_flags = context->ContextFlags; context->ContextFlags = CONTEXT_DEBUG_REGISTERS; NtGetContextThread(GetCurrentThread(), context); context->ContextFlags |= saved_flags; /* restore flags */ } context->EFlags &= ~0x100; /* clear single-step flag */ } status = send_debug_event( rec, context, TRUE ); if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED) { restore_context( xcontext, sigcontext ); return; } /* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */ if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context->Rip--; stack_size = sizeof(*stack) + 0x20; if ((src_xs = xstate_from_context( context ))) { stack_size += (ULONG_PTR)stack_ptr - 0x20 - (((ULONG_PTR)stack_ptr - 0x20 - sizeof(XSTATE)) & ~(ULONG_PTR)63); } stack = virtual_setup_exception( stack_ptr, stack_size, rec ); stack->rec = *rec; stack->context = *context; if (src_xs) { XSTATE *dst_xs = (XSTATE *)stack->xstate; assert( !((ULONG_PTR)dst_xs & 63) ); context_init_xstate( &stack->context, stack->xstate ); memset( dst_xs, 0, offsetof(XSTATE, YmmContext) ); dst_xs->CompactionMask = xstate_compaction_enabled ? 0x8000000000000004 : 0; if (src_xs->Mask & 4) { dst_xs->Mask = 4; memcpy( &dst_xs->YmmContext, &src_xs->YmmContext, sizeof(dst_xs->YmmContext) ); } } RIP_sig(sigcontext) = (ULONG_PTR)pKiUserExceptionDispatcher; RSP_sig(sigcontext) = (ULONG_PTR)stack; /* clear single-step, direction, and align check flag */ EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000); leave_handler( sigcontext ); } /*********************************************************************** * 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 void setup_exception( ucontext_t *sigcontext, EXCEPTION_RECORD *rec ) { struct xcontext context; rec->ExceptionAddress = (void *)RIP_sig(sigcontext); save_context( &context, sigcontext ); setup_raise_exception( sigcontext, rec, &context ); } /*********************************************************************** * call_user_apc_dispatcher */ NTSTATUS call_user_apc_dispatcher( CONTEXT *context, ULONG_PTR arg1, ULONG_PTR arg2, ULONG_PTR arg3, PNTAPCFUNC func, NTSTATUS status ) { struct syscall_frame *frame = amd64_thread_data()->syscall_frame; ULONG64 rsp = context ? context->Rsp : frame->rsp; struct apc_stack_layout *stack; rsp &= ~15; stack = (struct apc_stack_layout *)rsp - 1; if (context) { memmove( &stack->context, context, sizeof(stack->context) ); NtSetContextThread( GetCurrentThread(), &stack->context ); } else { stack->context.ContextFlags = CONTEXT_FULL; NtGetContextThread( GetCurrentThread(), &stack->context ); stack->context.Rax = status; } frame->rbp = stack->context.Rbp; frame->rsp = (ULONG64)stack - 8; frame->rip = (ULONG64)pKiUserApcDispatcher; frame->rcx = (ULONG64)&stack->context; frame->rdx = arg1; frame->r8 = arg2; frame->r9 = arg3; stack->func = func; frame->restore_flags |= CONTEXT_CONTROL | CONTEXT_INTEGER; return status; } /*********************************************************************** * call_raise_user_exception_dispatcher */ void call_raise_user_exception_dispatcher(void) { amd64_thread_data()->syscall_frame->rip = (UINT64)pKiRaiseUserExceptionDispatcher; } /*********************************************************************** * call_user_exception_dispatcher */ NTSTATUS call_user_exception_dispatcher( EXCEPTION_RECORD *rec, CONTEXT *context ) { struct syscall_frame *frame = amd64_thread_data()->syscall_frame; struct stack_layout *stack; ULONG64 rsp; NTSTATUS status = NtSetContextThread( GetCurrentThread(), context ); if (status) return status; rsp = (context->Rsp - 0x20) & ~15; stack = (struct stack_layout *)rsp - 1; if ((context->ContextFlags & CONTEXT_XSTATE) == CONTEXT_XSTATE) { rsp = (rsp - sizeof(XSTATE)) & ~63; stack = (struct stack_layout *)rsp - 1; assert( !((ULONG_PTR)stack->xstate & 63) ); context_init_xstate( &stack->context, stack->xstate ); memcpy( stack->xstate, &frame->xstate, sizeof(frame->xstate) ); } memmove( &stack->context, context, sizeof(*context) ); stack->rec = *rec; /* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */ if (stack->rec.ExceptionCode == EXCEPTION_BREAKPOINT) stack->context.Rip--; frame->rbp = context->Rbp; frame->rsp = (ULONG64)stack; frame->rip = (ULONG64)pKiUserExceptionDispatcher; frame->restore_flags |= CONTEXT_CONTROL; return status; } /*********************************************************************** * 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, EXCEPTION_RECORD *rec, struct xcontext *xcontext ) { CONTEXT *context = &xcontext->c; switch (ERROR_sig(sigcontext) >> 3) { case 0x2c: rec->ExceptionCode = STATUS_ASSERTION_FAILURE; break; case 0x2d: switch (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; leave_handler( sigcontext ); return TRUE; } context->Rip += 3; rec->ExceptionCode = EXCEPTION_BREAKPOINT; rec->ExceptionAddress = (void *)context->Rip; rec->NumberParameters = 1; rec->ExceptionInformation[0] = context->Rax; break; default: return FALSE; } setup_raise_exception( sigcontext, rec, xcontext ); return TRUE; } /*********************************************************************** * handle_syscall_fault * * Handle a page fault happening during a system call. */ static BOOL handle_syscall_fault( ucontext_t *sigcontext, EXCEPTION_RECORD *rec, CONTEXT *context ) { struct syscall_frame *frame = amd64_thread_data()->syscall_frame; DWORD i; if (!is_inside_syscall( sigcontext )) return FALSE; TRACE_(seh)( "code=%x flags=%x addr=%p ip=%lx tid=%04x\n", rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress, context->Rip, GetCurrentThreadId() ); for (i = 0; i < rec->NumberParameters; i++) TRACE_(seh)( " info[%d]=%016lx\n", i, rec->ExceptionInformation[i] ); TRACE_(seh)( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n", context->Rax, context->Rbx, context->Rcx, context->Rdx ); TRACE_(seh)( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n", context->Rsi, context->Rdi, context->Rbp, context->Rsp ); TRACE_(seh)( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n", context->R8, context->R9, context->R10, context->R11 ); TRACE_(seh)( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n", context->R12, context->R13, context->R14, context->R15 ); if (ntdll_get_thread_data()->jmp_buf) { TRACE_(seh)( "returning to handler\n" ); RCX_sig(sigcontext) = (ULONG_PTR)ntdll_get_thread_data()->jmp_buf; RDX_sig(sigcontext) = 1; RIP_sig(sigcontext) = (ULONG_PTR)__wine_longjmp; ntdll_get_thread_data()->jmp_buf = NULL; } else { TRACE_(seh)( "returning to user mode ip=%016lx ret=%08x\n", frame->rip, rec->ExceptionCode ); RCX_sig(sigcontext) = (ULONG_PTR)frame; RDX_sig(sigcontext) = rec->ExceptionCode; RIP_sig(sigcontext) = (ULONG_PTR)__wine_syscall_dispatcher_return; } return TRUE; } /*********************************************************************** * handle_syscall_trap * * Handle a trap exception during a system call. */ static BOOL handle_syscall_trap( ucontext_t *sigcontext ) { extern void __wine_syscall_dispatcher_prolog_end(void); struct syscall_frame *frame = amd64_thread_data()->syscall_frame; /* disallow single-stepping through a syscall */ if ((void *)RIP_sig( sigcontext ) != __wine_syscall_dispatcher) return FALSE; TRACE_(seh)( "ignoring trap in syscall rip=%p eflags=%08x\n", (void *)RIP_sig(sigcontext), (ULONG)EFL_sig(sigcontext) ); frame->rip = *(ULONG64 *)RSP_sig( sigcontext ); frame->eflags = EFL_sig(sigcontext); frame->restore_flags = CONTEXT_CONTROL; RIP_sig( sigcontext ) = (ULONG64)__wine_syscall_dispatcher_prolog_end; RCX_sig( sigcontext ) = (ULONG64)frame; RSP_sig( sigcontext ) += sizeof(ULONG64); EFL_sig( sigcontext ) &= ~0x100; /* clear single-step flag */ return TRUE; } /********************************************************************** * segv_handler * * Handler for SIGSEGV and related errors. */ static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD rec = { 0 }; struct xcontext context; ucontext_t *ucontext = sigcontext; rec.ExceptionAddress = (void *)RIP_sig(ucontext); save_context( &context, sigcontext ); switch(TRAP_sig(ucontext)) { case TRAP_x86_OFLOW: /* Overflow exception */ rec.ExceptionCode = EXCEPTION_INT_OVERFLOW; break; case TRAP_x86_BOUND: /* Bound range exception */ rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED; break; case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */ rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; break; case TRAP_x86_STKFLT: /* Stack fault */ rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW; break; case TRAP_x86_SEGNPFLT: /* Segment not present exception */ case TRAP_x86_PROTFLT: /* General protection fault */ { WORD err = ERROR_sig(ucontext); if (!err && (rec.ExceptionCode = is_privileged_instr( &context.c ))) break; if ((err & 7) == 2 && handle_interrupt( ucontext, &rec, &context )) return; rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION; rec.NumberParameters = 2; rec.ExceptionInformation[0] = 0; rec.ExceptionInformation[1] = 0xffffffffffffffff; } break; case TRAP_x86_PAGEFLT: /* Page fault */ rec.NumberParameters = 2; rec.ExceptionInformation[0] = (ERROR_sig(ucontext) >> 1) & 0x09; rec.ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr; rec.ExceptionCode = virtual_handle_fault( siginfo->si_addr, rec.ExceptionInformation[0], (void *)RSP_sig(ucontext) ); if (!rec.ExceptionCode) { leave_handler( sigcontext ); return; } break; case TRAP_x86_ALIGNFLT: /* Alignment check exception */ if (EFL_sig(ucontext) & 0x00040000) { EFL_sig(ucontext) &= ~0x00040000; /* reset AC flag */ leave_handler( sigcontext ); return; } rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT; break; default: ERR_(seh)( "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 */ rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; break; } if (handle_syscall_fault( sigcontext, &rec, &context.c )) return; setup_raise_exception( sigcontext, &rec, &context ); } /********************************************************************** * trap_handler * * Handler for SIGTRAP. */ static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD rec = { 0 }; struct xcontext context; ucontext_t *ucontext = sigcontext; if (handle_syscall_trap( sigcontext )) return; rec.ExceptionAddress = (void *)RIP_sig(ucontext); save_context( &context, sigcontext ); switch (siginfo->si_code) { case TRAP_TRACE: /* Single-step exception */ case 4 /* TRAP_HWBKPT */: /* Hardware breakpoint exception */ 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 *)RIP_sig(ucontext))[-1] == 0xF1) { rec.ExceptionCode = EXCEPTION_SINGLE_STEP; break; } rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */ /* fall through */ default: rec.ExceptionCode = EXCEPTION_BREAKPOINT; rec.NumberParameters = 1; rec.ExceptionInformation[0] = 0; break; } setup_raise_exception( sigcontext, &rec, &context ); } /********************************************************************** * fpe_handler * * Handler for SIGFPE. */ static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD rec = { 0 }; switch (siginfo->si_code) { case FPE_FLTSUB: rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED; break; case FPE_INTDIV: rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO; break; case FPE_INTOVF: rec.ExceptionCode = EXCEPTION_INT_OVERFLOW; break; case FPE_FLTDIV: rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO; break; case FPE_FLTOVF: rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW; break; case FPE_FLTUND: rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW; break; case FPE_FLTRES: rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT; break; case FPE_FLTINV: default: rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION; break; } setup_exception( sigcontext, &rec ); } /********************************************************************** * int_handler * * Handler for SIGINT. */ static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { HANDLE handle; if (!p__wine_ctrl_routine) return; if (!NtCreateThreadEx( &handle, THREAD_ALL_ACCESS, NULL, NtCurrentProcess(), p__wine_ctrl_routine, 0 /* CTRL_C_EVENT */, 0, 0, 0, 0, NULL )) NtClose( handle ); } /********************************************************************** * abrt_handler * * Handler for SIGABRT. */ static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext ) { EXCEPTION_RECORD rec = { EXCEPTION_WINE_ASSERTION, EH_NONCONTINUABLE }; setup_exception( sigcontext, &rec ); } /********************************************************************** * quit_handler * * Handler for SIGQUIT. */ static void quit_handler( int signal, siginfo_t *siginfo, void *ucontext ) { init_handler( 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 ) { struct xcontext context; if (is_inside_syscall( ucontext )) { DECLSPEC_ALIGN(64) XSTATE xs; context.c.ContextFlags = CONTEXT_FULL; context_init_xstate( &context.c, &xs ); NtGetContextThread( GetCurrentThread(), &context.c ); wait_suspend( &context.c ); NtSetContextThread( GetCurrentThread(), &context.c ); } else { save_context( &context, ucontext ); wait_suspend( &context.c ); restore_context( &context, ucontext ); } } /********************************************************************** * get_thread_ldt_entry */ NTSTATUS get_thread_ldt_entry( HANDLE handle, void *data, ULONG len, ULONG *ret_len ) { return STATUS_NOT_IMPLEMENTED; } /****************************************************************************** * NtSetLdtEntries (NTDLL.@) * ZwSetLdtEntries (NTDLL.@) */ NTSTATUS WINAPI NtSetLdtEntries( ULONG sel1, LDT_ENTRY entry1, ULONG sel2, LDT_ENTRY entry2 ) { return STATUS_NOT_IMPLEMENTED; } /********************************************************************** * signal_init_threading */ void signal_init_threading(void) { __asm__( "movw %%cs,%0" : "=m" (cs64_sel) ); __asm__( "movw %%ss,%0" : "=m" (ds64_sel) ); } /********************************************************************** * signal_alloc_thread */ NTSTATUS signal_alloc_thread( TEB *teb ) { return STATUS_SUCCESS; } /********************************************************************** * signal_free_thread */ void signal_free_thread( TEB *teb ) { } #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; kern_return_t kr = thread_info(mach_thread_self(), THREAD_IDENTIFIER_INFO, (thread_info_t) &tiinfo, &info_count); if (kr == KERN_SUCCESS) 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))) 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) return (char*)pthread_self() + gsbase_offset; return NULL; } #endif /********************************************************************** * signal_init_thread */ void signal_init_thread( TEB *teb ) { const WORD fpu_cw = 0x27f; #if defined __linux__ arch_prctl( ARCH_SET_GS, teb ); arch_prctl( ARCH_GET_FS, &amd64_thread_data()->pthread_teb ); if (fs32_sel) alloc_fs_sel( fs32_sel >> 3, (char *)teb + teb->WowTebOffset ); #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))); amd64_thread_data()->pthread_teb = mac_thread_gsbase(); /* 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] = amd64_thread_data()->pthread_teb; #else # error Please define setting %gs for your architecture #endif #ifdef __GNUC__ __asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw)); #else FIXME_(seh)("FPU setup not implemented for this platform.\n"); #endif } /********************************************************************** * signal_init_process */ void signal_init_process(void) { struct sigaction sig_act; void *ptr, *kernel_stack = (char *)ntdll_get_thread_data()->kernel_stack + kernel_stack_size; amd64_thread_data()->syscall_frame = (struct syscall_frame *)kernel_stack - 1; /* sneak in a syscall dispatcher pointer at a fixed address (7ffe1000) */ ptr = (char *)user_shared_data + page_size; anon_mmap_fixed( ptr, page_size, PROT_READ | PROT_WRITE, 0 ); *(void **)ptr = __wine_syscall_dispatcher; if (cpu_info.ProcessorFeatureBits & CPU_FEATURE_XSAVE) __wine_syscall_flags |= SYSCALL_HAVE_XSAVE; if (xstate_compaction_enabled) __wine_syscall_flags |= SYSCALL_HAVE_XSAVEC; #ifdef __linux__ if (NtCurrentTeb()->WowTebOffset) { void *teb32 = (char *)NtCurrentTeb() + NtCurrentTeb()->WowTebOffset; int sel; cs32_sel = 0x23; if ((sel = alloc_fs_sel( -1, teb32 )) != -1) { fs32_sel = (sel << 3) | 3; __wine_syscall_flags |= SYSCALL_HAVE_PTHREAD_TEB; if (getauxval( AT_HWCAP2 ) & 2) __wine_syscall_flags |= SYSCALL_HAVE_WRFSGSBASE; } else ERR_(seh)( "failed to allocate %%fs selector\n" ); } #endif sig_act.sa_mask = server_block_set; sig_act.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; sig_act.sa_sigaction = int_handler; if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = fpe_handler; if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = abrt_handler; if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = quit_handler; if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = usr1_handler; if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = trap_handler; if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error; sig_act.sa_sigaction = segv_handler; if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error; if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error; if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error; return; error: perror("sigaction"); exit(1); } /*********************************************************************** * call_init_thunk */ void DECLSPEC_HIDDEN call_init_thunk( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend, TEB *teb ) { struct amd64_thread_data *thread_data = (struct amd64_thread_data *)&teb->GdiTebBatch; struct syscall_frame *frame = thread_data->syscall_frame; CONTEXT *ctx, context = { 0 }; I386_CONTEXT *wow_context; context.ContextFlags = CONTEXT_ALL; context.Rcx = (ULONG_PTR)entry; context.Rdx = (ULONG_PTR)arg; context.Rsp = (ULONG_PTR)teb->Tib.StackBase - 0x28; context.Rip = (ULONG_PTR)pRtlUserThreadStart; context.SegCs = cs64_sel; context.SegDs = ds64_sel; context.SegEs = ds64_sel; context.SegFs = fs32_sel; context.SegGs = ds64_sel; context.SegSs = ds64_sel; context.EFlags = 0x200; context.u.FltSave.ControlWord = 0x27f; context.u.FltSave.MxCsr = context.MxCsr = 0x1f80; if ((wow_context = get_cpu_area( IMAGE_FILE_MACHINE_I386 ))) { wow_context->ContextFlags = CONTEXT_I386_ALL; wow_context->Eax = (ULONG_PTR)entry; wow_context->Ebx = (arg == peb ? get_wow_teb( teb )->Peb : (ULONG_PTR)arg); wow_context->Esp = get_wow_teb( teb )->Tib.StackBase - 16; wow_context->Eip = pLdrSystemDllInitBlock->pRtlUserThreadStart; wow_context->SegCs = cs32_sel; wow_context->SegDs = context.SegDs; wow_context->SegEs = context.SegEs; wow_context->SegFs = context.SegFs; wow_context->SegGs = context.SegGs; wow_context->SegSs = context.SegSs; wow_context->EFlags = 0x202; wow_context->FloatSave.ControlWord = context.u.FltSave.ControlWord; *(XSAVE_FORMAT *)wow_context->ExtendedRegisters = context.u.FltSave; } if (suspend) wait_suspend( &context ); ctx = (CONTEXT *)((ULONG_PTR)context.Rsp & ~15) - 1; *ctx = context; ctx->ContextFlags = CONTEXT_FULL; memset( frame, 0, sizeof(*frame) ); NtSetContextThread( GetCurrentThread(), ctx ); frame->rsp = (ULONG64)ctx - 8; frame->rip = (ULONG64)pLdrInitializeThunk; frame->rcx = (ULONG64)ctx; frame->restore_flags |= CONTEXT_INTEGER; pthread_sigmask( SIG_UNBLOCK, &server_block_set, NULL ); __wine_syscall_dispatcher_return( frame, 0 ); } /*********************************************************************** * signal_start_thread */ __ASM_GLOBAL_FUNC( signal_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 %rsp,0x320(%rcx)\n\t" /* amd64_thread_data()->exit_frame */ /* set syscall frame */ "movq 0x328(%rcx),%rax\n\t" /* amd64_thread_data()->syscall_frame */ "orq %rax,%rax\n\t" "jnz 1f\n\t" "leaq -0x400(%rsp),%rax\n\t" /* sizeof(struct syscall_frame) */ "andq $~63,%rax\n\t" "movq %rax,0x328(%rcx)\n" /* amd64_thread_data()->syscall_frame */ "1:\tmovq %rax,%rsp\n\t" "call " __ASM_NAME("call_init_thunk")) /*********************************************************************** * signal_exit_thread */ __ASM_GLOBAL_FUNC( signal_exit_thread, /* fetch exit frame */ "xorl %ecx,%ecx\n\t" "xchgq %rcx,0x320(%rdx)\n\t" /* amd64_thread_data()->exit_frame */ "testq %rcx,%rcx\n\t" "jnz 1f\n\t" "jmp *%rsi\n" /* switch to exit frame stack */ "1:\tmovq %rcx,%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" ) #endif /* __x86_64__ */