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/*
* x86-64 signal handling routines
*
* Copyright 1999, 2005 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifdef __x86_64__
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <signal.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_MACHINE_SYSARCH_H
# include <machine/sysarch.h>
#endif
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#ifdef HAVE_SYSCALL_H
# include <syscall.h>
#else
# ifdef HAVE_SYS_SYSCALL_H
# include <sys/syscall.h>
# endif
#endif
#ifdef HAVE_SYS_SIGNAL_H
# include <sys/signal.h>
#endif
#ifdef HAVE_SYS_UCONTEXT_H
# include <sys/ucontext.h>
#endif
#ifdef HAVE_LIBUNWIND_H
# define UNW_LOCAL_ONLY
# include <libunwind.h>
#endif
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.h"
#include "wine/library.h"
#include "wine/exception.h"
#include "wine/list.h"
#include "ntdll_misc.h"
#include "wine/debug.h"
#ifdef HAVE_VALGRIND_MEMCHECK_H
#include <valgrind/memcheck.h>
#endif
WINE_DEFAULT_DEBUG_CHANNEL(seh);
WINE_DECLARE_DEBUG_CHANNEL(relay);
struct _DISPATCHER_CONTEXT;
typedef LONG (WINAPI *PC_LANGUAGE_EXCEPTION_HANDLER)( EXCEPTION_POINTERS *ptrs, ULONG64 frame );
typedef EXCEPTION_DISPOSITION (WINAPI *PEXCEPTION_ROUTINE)( EXCEPTION_RECORD *rec,
ULONG64 frame,
CONTEXT *context,
struct _DISPATCHER_CONTEXT *dispatch );
typedef void (WINAPI *TERMINATION_HANDLER)( ULONG flags, ULONG64 frame );
typedef struct _DISPATCHER_CONTEXT
{
ULONG64 ControlPc;
ULONG64 ImageBase;
PRUNTIME_FUNCTION FunctionEntry;
ULONG64 EstablisherFrame;
ULONG64 TargetIp;
PCONTEXT ContextRecord;
PEXCEPTION_ROUTINE LanguageHandler;
PVOID HandlerData;
PUNWIND_HISTORY_TABLE HistoryTable;
ULONG ScopeIndex;
} DISPATCHER_CONTEXT, *PDISPATCHER_CONTEXT;
typedef struct _SCOPE_TABLE
{
ULONG Count;
struct
{
ULONG BeginAddress;
ULONG EndAddress;
ULONG HandlerAddress;
ULONG JumpTarget;
} ScopeRecord[1];
} SCOPE_TABLE, *PSCOPE_TABLE;
/* layering violation: the setjmp buffer is defined in msvcrt, but used by RtlUnwindEx */
struct MSVCRT_JUMP_BUFFER
{
ULONG64 Frame;
ULONG64 Rbx;
ULONG64 Rsp;
ULONG64 Rbp;
ULONG64 Rsi;
ULONG64 Rdi;
ULONG64 R12;
ULONG64 R13;
ULONG64 R14;
ULONG64 R15;
ULONG64 Rip;
ULONG64 Spare;
M128A Xmm6;
M128A Xmm7;
M128A Xmm8;
M128A Xmm9;
M128A Xmm10;
M128A Xmm11;
M128A Xmm12;
M128A Xmm13;
M128A Xmm14;
M128A Xmm15;
};
/***********************************************************************
* signal context platform-specific definitions
*/
#ifdef linux
#include <asm/prctl.h>
static inline int arch_prctl( int func, void *ptr ) { return syscall( __NR_arch_prctl, func, ptr ); }
#define RAX_sig(context) ((context)->uc_mcontext.gregs[REG_RAX])
#define RBX_sig(context) ((context)->uc_mcontext.gregs[REG_RBX])
#define RCX_sig(context) ((context)->uc_mcontext.gregs[REG_RCX])
#define RDX_sig(context) ((context)->uc_mcontext.gregs[REG_RDX])
#define RSI_sig(context) ((context)->uc_mcontext.gregs[REG_RSI])
#define RDI_sig(context) ((context)->uc_mcontext.gregs[REG_RDI])
#define RBP_sig(context) ((context)->uc_mcontext.gregs[REG_RBP])
#define R8_sig(context) ((context)->uc_mcontext.gregs[REG_R8])
#define R9_sig(context) ((context)->uc_mcontext.gregs[REG_R9])
#define R10_sig(context) ((context)->uc_mcontext.gregs[REG_R10])
#define R11_sig(context) ((context)->uc_mcontext.gregs[REG_R11])
#define R12_sig(context) ((context)->uc_mcontext.gregs[REG_R12])
#define R13_sig(context) ((context)->uc_mcontext.gregs[REG_R13])
#define R14_sig(context) ((context)->uc_mcontext.gregs[REG_R14])
#define R15_sig(context) ((context)->uc_mcontext.gregs[REG_R15])
#define CS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 0))
#define GS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 1))
#define FS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 2))
#define RSP_sig(context) ((context)->uc_mcontext.gregs[REG_RSP])
#define RIP_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
#define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
#define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
#define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
#define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.fpregs))
#elif defined(__FreeBSD__) || defined (__FreeBSD_kernel__)
#define RAX_sig(context) ((context)->uc_mcontext.mc_rax)
#define RBX_sig(context) ((context)->uc_mcontext.mc_rbx)
#define RCX_sig(context) ((context)->uc_mcontext.mc_rcx)
#define RDX_sig(context) ((context)->uc_mcontext.mc_rdx)
#define RSI_sig(context) ((context)->uc_mcontext.mc_rsi)
#define RDI_sig(context) ((context)->uc_mcontext.mc_rdi)
#define RBP_sig(context) ((context)->uc_mcontext.mc_rbp)
#define R8_sig(context) ((context)->uc_mcontext.mc_r8)
#define R9_sig(context) ((context)->uc_mcontext.mc_r9)
#define R10_sig(context) ((context)->uc_mcontext.mc_r10)
#define R11_sig(context) ((context)->uc_mcontext.mc_r11)
#define R12_sig(context) ((context)->uc_mcontext.mc_r12)
#define R13_sig(context) ((context)->uc_mcontext.mc_r13)
#define R14_sig(context) ((context)->uc_mcontext.mc_r14)
#define R15_sig(context) ((context)->uc_mcontext.mc_r15)
#define CS_sig(context) ((context)->uc_mcontext.mc_cs)
#define DS_sig(context) ((context)->uc_mcontext.mc_ds)
#define ES_sig(context) ((context)->uc_mcontext.mc_es)
#define FS_sig(context) ((context)->uc_mcontext.mc_fs)
#define GS_sig(context) ((context)->uc_mcontext.mc_gs)
#define SS_sig(context) ((context)->uc_mcontext.mc_ss)
#define EFL_sig(context) ((context)->uc_mcontext.mc_rflags)
#define RIP_sig(context) ((context)->uc_mcontext.mc_rip)
#define RSP_sig(context) ((context)->uc_mcontext.mc_rsp)
#define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
#define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
#define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.mc_fpstate))
#elif defined(__NetBSD__)
#define RAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RAX])
#define RBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBX])
#define RCX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RCX])
#define RDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDX])
#define RSI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RSI])
#define RDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDI])
#define RBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBP])
#define R8_sig(context) ((context)->uc_mcontext.__gregs[_REG_R8])
#define R9_sig(context) ((context)->uc_mcontext.__gregs[_REG_R9])
#define R10_sig(context) ((context)->uc_mcontext.__gregs[_REG_R10])
#define R11_sig(context) ((context)->uc_mcontext.__gregs[_REG_R11])
#define R12_sig(context) ((context)->uc_mcontext.__gregs[_REG_R12])
#define R13_sig(context) ((context)->uc_mcontext.__gregs[_REG_R13])
#define R14_sig(context) ((context)->uc_mcontext.__gregs[_REG_R14])
#define R15_sig(context) ((context)->uc_mcontext.__gregs[_REG_R15])
#define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
#define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
#define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
#define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
#define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
#define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
#define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_RFL])
#define RIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_RIP]))
#define RSP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_URSP]))
#define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
#define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
#define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.__fpregs))
#elif defined (__APPLE__)
#define RAX_sig(context) ((context)->uc_mcontext->__ss.__rax)
#define RBX_sig(context) ((context)->uc_mcontext->__ss.__rbx)
#define RCX_sig(context) ((context)->uc_mcontext->__ss.__rcx)
#define RDX_sig(context) ((context)->uc_mcontext->__ss.__rdx)
#define RSI_sig(context) ((context)->uc_mcontext->__ss.__rsi)
#define RDI_sig(context) ((context)->uc_mcontext->__ss.__rdi)
#define RBP_sig(context) ((context)->uc_mcontext->__ss.__rbp)
#define R8_sig(context) ((context)->uc_mcontext->__ss.__r8)
#define R9_sig(context) ((context)->uc_mcontext->__ss.__r9)
#define R10_sig(context) ((context)->uc_mcontext->__ss.__r10)
#define R11_sig(context) ((context)->uc_mcontext->__ss.__r11)
#define R12_sig(context) ((context)->uc_mcontext->__ss.__r12)
#define R13_sig(context) ((context)->uc_mcontext->__ss.__r13)
#define R14_sig(context) ((context)->uc_mcontext->__ss.__r14)
#define R15_sig(context) ((context)->uc_mcontext->__ss.__r15)
#define CS_sig(context) ((context)->uc_mcontext->__ss.__cs)
#define FS_sig(context) ((context)->uc_mcontext->__ss.__fs)
#define GS_sig(context) ((context)->uc_mcontext->__ss.__gs)
#define EFL_sig(context) ((context)->uc_mcontext->__ss.__rflags)
#define RIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__rip))
#define RSP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__rsp))
#define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno)
#define ERROR_sig(context) ((context)->uc_mcontext->__es.__err)
#define FPU_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->__fs.__fpu_fcw)
#else
#error You must define the signal context functions for your platform
#endif
enum i386_trap_code
{
TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
TRAP_x86_DIVIDE = 0, /* Division by zero exception */
TRAP_x86_TRCTRAP = 1, /* Single-step exception */
TRAP_x86_NMI = 2, /* NMI interrupt */
TRAP_x86_BPTFLT = 3, /* Breakpoint exception */
TRAP_x86_OFLOW = 4, /* Overflow exception */
TRAP_x86_BOUND = 5, /* Bound range exception */
TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */
TRAP_x86_DNA = 7, /* Device not available exception */
TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */
TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */
TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */
TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */
TRAP_x86_STKFLT = 12, /* Stack fault */
TRAP_x86_PROTFLT = 13, /* General protection fault */
TRAP_x86_PAGEFLT = 14, /* Page fault */
TRAP_x86_ARITHTRAP = 16, /* Floating point exception */
TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */
TRAP_x86_MCHK = 18, /* Machine check exception */
TRAP_x86_CACHEFLT = 19 /* Cache flush exception */
};
static const size_t teb_size = 0x2000; /* we reserve two pages for the TEB */
static size_t signal_stack_size;
typedef void (*raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context );
typedef int (*wine_signal_handler)(unsigned int sig);
static wine_signal_handler handlers[256];
struct amd64_thread_data
{
DWORD_PTR dr0; /* debug registers */
DWORD_PTR dr1;
DWORD_PTR dr2;
DWORD_PTR dr3;
DWORD_PTR dr6;
DWORD_PTR dr7;
void *exit_frame; /* exit frame pointer */
};
C_ASSERT( sizeof(struct amd64_thread_data) <= sizeof(((TEB *)0)->SystemReserved2) );
C_ASSERT( offsetof( TEB, SystemReserved2 ) + offsetof( struct amd64_thread_data, exit_frame ) == 0x330 );
static inline struct amd64_thread_data *amd64_thread_data(void)
{
return (struct amd64_thread_data *)NtCurrentTeb()->SystemReserved2;
}
/***********************************************************************
* Dynamic unwind table
*/
struct dynamic_unwind_entry
{
struct list entry;
/* memory region which matches this entry */
DWORD64 base;
DWORD size;
/* lookup table */
RUNTIME_FUNCTION *table;
DWORD table_size;
/* user defined callback */
PGET_RUNTIME_FUNCTION_CALLBACK callback;
PVOID context;
};
static struct list dynamic_unwind_list = LIST_INIT(dynamic_unwind_list);
static RTL_CRITICAL_SECTION dynamic_unwind_section;
static RTL_CRITICAL_SECTION_DEBUG dynamic_unwind_debug =
{
0, 0, &dynamic_unwind_section,
{ &dynamic_unwind_debug.ProcessLocksList, &dynamic_unwind_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": dynamic_unwind_section") }
};
static RTL_CRITICAL_SECTION dynamic_unwind_section = { &dynamic_unwind_debug, -1, 0, 0, 0, 0 };
/***********************************************************************
* Definitions for Win32 unwind tables
*/
union handler_data
{
RUNTIME_FUNCTION chain;
ULONG handler;
};
struct opcode
{
BYTE offset;
BYTE code : 4;
BYTE info : 4;
};
struct UNWIND_INFO
{
BYTE version : 3;
BYTE flags : 5;
BYTE prolog;
BYTE count;
BYTE frame_reg : 4;
BYTE frame_offset : 4;
struct opcode opcodes[1]; /* info->count entries */
/* followed by handler_data */
};
#define UWOP_PUSH_NONVOL 0
#define UWOP_ALLOC_LARGE 1
#define UWOP_ALLOC_SMALL 2
#define UWOP_SET_FPREG 3
#define UWOP_SAVE_NONVOL 4
#define UWOP_SAVE_NONVOL_FAR 5
#define UWOP_SAVE_XMM128 8
#define UWOP_SAVE_XMM128_FAR 9
#define UWOP_PUSH_MACHFRAME 10
static void dump_unwind_info( ULONG64 base, RUNTIME_FUNCTION *function )
{
static const char * const reg_names[16] =
{ "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" };
union handler_data *handler_data;
struct UNWIND_INFO *info;
unsigned int i, count;
TRACE( "**** func %x-%x\n", function->BeginAddress, function->EndAddress );
for (;;)
{
if (function->UnwindData & 1)
{
RUNTIME_FUNCTION *next = (RUNTIME_FUNCTION *)((char *)base + (function->UnwindData & ~1));
TRACE( "unwind info for function %p-%p chained to function %p-%p\n",
(char *)base + function->BeginAddress, (char *)base + function->EndAddress,
(char *)base + next->BeginAddress, (char *)base + next->EndAddress );
function = next;
continue;
}
info = (struct UNWIND_INFO *)((char *)base + function->UnwindData);
TRACE( "unwind info at %p flags %x prolog 0x%x bytes function %p-%p\n",
info, info->flags, info->prolog,
(char *)base + function->BeginAddress, (char *)base + function->EndAddress );
if (info->frame_reg)
TRACE( " frame register %s offset 0x%x(%%rsp)\n",
reg_names[info->frame_reg], info->frame_offset * 16 );
for (i = 0; i < info->count; i++)
{
TRACE( " 0x%x: ", info->opcodes[i].offset );
switch (info->opcodes[i].code)
{
case UWOP_PUSH_NONVOL:
TRACE( "pushq %%%s\n", reg_names[info->opcodes[i].info] );
break;
case UWOP_ALLOC_LARGE:
if (info->opcodes[i].info)
{
count = *(DWORD *)&info->opcodes[i+1];
i += 2;
}
else
{
count = *(USHORT *)&info->opcodes[i+1] * 8;
i++;
}
TRACE( "subq $0x%x,%%rsp\n", count );
break;
case UWOP_ALLOC_SMALL:
count = (info->opcodes[i].info + 1) * 8;
TRACE( "subq $0x%x,%%rsp\n", count );
break;
case UWOP_SET_FPREG:
TRACE( "leaq 0x%x(%%rsp),%s\n",
info->frame_offset * 16, reg_names[info->frame_reg] );
break;
case UWOP_SAVE_NONVOL:
count = *(USHORT *)&info->opcodes[i+1] * 8;
TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count );
i++;
break;
case UWOP_SAVE_NONVOL_FAR:
count = *(DWORD *)&info->opcodes[i+1];
TRACE( "movq %%%s,0x%x(%%rsp)\n", reg_names[info->opcodes[i].info], count );
i += 2;
break;
case UWOP_SAVE_XMM128:
count = *(USHORT *)&info->opcodes[i+1] * 16;
TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count );
i++;
break;
case UWOP_SAVE_XMM128_FAR:
count = *(DWORD *)&info->opcodes[i+1];
TRACE( "movaps %%xmm%u,0x%x(%%rsp)\n", info->opcodes[i].info, count );
i += 2;
break;
case UWOP_PUSH_MACHFRAME:
TRACE( "PUSH_MACHFRAME %u\n", info->opcodes[i].info );
break;
default:
FIXME( "unknown code %u\n", info->opcodes[i].code );
break;
}
}
handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1];
if (info->flags & UNW_FLAG_CHAININFO)
{
TRACE( " chained to function %p-%p\n",
(char *)base + handler_data->chain.BeginAddress,
(char *)base + handler_data->chain.EndAddress );
function = &handler_data->chain;
continue;
}
if (info->flags & (UNW_FLAG_EHANDLER | UNW_FLAG_UHANDLER))
TRACE( " handler %p data at %p\n",
(char *)base + handler_data->handler, &handler_data->handler + 1 );
break;
}
}
static void dump_scope_table( ULONG64 base, const SCOPE_TABLE *table )
{
unsigned int i;
TRACE( "scope table at %p\n", table );
for (i = 0; i < table->Count; i++)
TRACE( " %u: %lx-%lx handler %lx target %lx\n", i,
base + table->ScopeRecord[i].BeginAddress,
base + table->ScopeRecord[i].EndAddress,
base + table->ScopeRecord[i].HandlerAddress,
base + table->ScopeRecord[i].JumpTarget );
}
/***********************************************************************
* Definitions for Dwarf unwind tables
*/
enum dwarf_call_frame_info
{
DW_CFA_advance_loc = 0x40,
DW_CFA_offset = 0x80,
DW_CFA_restore = 0xc0,
DW_CFA_nop = 0x00,
DW_CFA_set_loc = 0x01,
DW_CFA_advance_loc1 = 0x02,
DW_CFA_advance_loc2 = 0x03,
DW_CFA_advance_loc4 = 0x04,
DW_CFA_offset_extended = 0x05,
DW_CFA_restore_extended = 0x06,
DW_CFA_undefined = 0x07,
DW_CFA_same_value = 0x08,
DW_CFA_register = 0x09,
DW_CFA_remember_state = 0x0a,
DW_CFA_restore_state = 0x0b,
DW_CFA_def_cfa = 0x0c,
DW_CFA_def_cfa_register = 0x0d,
DW_CFA_def_cfa_offset = 0x0e,
DW_CFA_def_cfa_expression = 0x0f,
DW_CFA_expression = 0x10,
DW_CFA_offset_extended_sf = 0x11,
DW_CFA_def_cfa_sf = 0x12,
DW_CFA_def_cfa_offset_sf = 0x13,
DW_CFA_val_offset = 0x14,
DW_CFA_val_offset_sf = 0x15,
DW_CFA_val_expression = 0x16,
};
enum dwarf_operation
{
DW_OP_addr = 0x03,
DW_OP_deref = 0x06,
DW_OP_const1u = 0x08,
DW_OP_const1s = 0x09,
DW_OP_const2u = 0x0a,
DW_OP_const2s = 0x0b,
DW_OP_const4u = 0x0c,
DW_OP_const4s = 0x0d,
DW_OP_const8u = 0x0e,
DW_OP_const8s = 0x0f,
DW_OP_constu = 0x10,
DW_OP_consts = 0x11,
DW_OP_dup = 0x12,
DW_OP_drop = 0x13,
DW_OP_over = 0x14,
DW_OP_pick = 0x15,
DW_OP_swap = 0x16,
DW_OP_rot = 0x17,
DW_OP_xderef = 0x18,
DW_OP_abs = 0x19,
DW_OP_and = 0x1a,
DW_OP_div = 0x1b,
DW_OP_minus = 0x1c,
DW_OP_mod = 0x1d,
DW_OP_mul = 0x1e,
DW_OP_neg = 0x1f,
DW_OP_not = 0x20,
DW_OP_or = 0x21,
DW_OP_plus = 0x22,
DW_OP_plus_uconst = 0x23,
DW_OP_shl = 0x24,
DW_OP_shr = 0x25,
DW_OP_shra = 0x26,
DW_OP_xor = 0x27,
DW_OP_bra = 0x28,
DW_OP_eq = 0x29,
DW_OP_ge = 0x2a,
DW_OP_gt = 0x2b,
DW_OP_le = 0x2c,
DW_OP_lt = 0x2d,
DW_OP_ne = 0x2e,
DW_OP_skip = 0x2f,
DW_OP_lit0 = 0x30,
DW_OP_lit1 = 0x31,
DW_OP_lit2 = 0x32,
DW_OP_lit3 = 0x33,
DW_OP_lit4 = 0x34,
DW_OP_lit5 = 0x35,
DW_OP_lit6 = 0x36,
DW_OP_lit7 = 0x37,
DW_OP_lit8 = 0x38,
DW_OP_lit9 = 0x39,
DW_OP_lit10 = 0x3a,
DW_OP_lit11 = 0x3b,
DW_OP_lit12 = 0x3c,
DW_OP_lit13 = 0x3d,
DW_OP_lit14 = 0x3e,
DW_OP_lit15 = 0x3f,
DW_OP_lit16 = 0x40,
DW_OP_lit17 = 0x41,
DW_OP_lit18 = 0x42,
DW_OP_lit19 = 0x43,
DW_OP_lit20 = 0x44,
DW_OP_lit21 = 0x45,
DW_OP_lit22 = 0x46,
DW_OP_lit23 = 0x47,
DW_OP_lit24 = 0x48,
DW_OP_lit25 = 0x49,
DW_OP_lit26 = 0x4a,
DW_OP_lit27 = 0x4b,
DW_OP_lit28 = 0x4c,
DW_OP_lit29 = 0x4d,
DW_OP_lit30 = 0x4e,
DW_OP_lit31 = 0x4f,
DW_OP_reg0 = 0x50,
DW_OP_reg1 = 0x51,
DW_OP_reg2 = 0x52,
DW_OP_reg3 = 0x53,
DW_OP_reg4 = 0x54,
DW_OP_reg5 = 0x55,
DW_OP_reg6 = 0x56,
DW_OP_reg7 = 0x57,
DW_OP_reg8 = 0x58,
DW_OP_reg9 = 0x59,
DW_OP_reg10 = 0x5a,
DW_OP_reg11 = 0x5b,
DW_OP_reg12 = 0x5c,
DW_OP_reg13 = 0x5d,
DW_OP_reg14 = 0x5e,
DW_OP_reg15 = 0x5f,
DW_OP_reg16 = 0x60,
DW_OP_reg17 = 0x61,
DW_OP_reg18 = 0x62,
DW_OP_reg19 = 0x63,
DW_OP_reg20 = 0x64,
DW_OP_reg21 = 0x65,
DW_OP_reg22 = 0x66,
DW_OP_reg23 = 0x67,
DW_OP_reg24 = 0x68,
DW_OP_reg25 = 0x69,
DW_OP_reg26 = 0x6a,
DW_OP_reg27 = 0x6b,
DW_OP_reg28 = 0x6c,
DW_OP_reg29 = 0x6d,
DW_OP_reg30 = 0x6e,
DW_OP_reg31 = 0x6f,
DW_OP_breg0 = 0x70,
DW_OP_breg1 = 0x71,
DW_OP_breg2 = 0x72,
DW_OP_breg3 = 0x73,
DW_OP_breg4 = 0x74,
DW_OP_breg5 = 0x75,
DW_OP_breg6 = 0x76,
DW_OP_breg7 = 0x77,
DW_OP_breg8 = 0x78,
DW_OP_breg9 = 0x79,
DW_OP_breg10 = 0x7a,
DW_OP_breg11 = 0x7b,
DW_OP_breg12 = 0x7c,
DW_OP_breg13 = 0x7d,
DW_OP_breg14 = 0x7e,
DW_OP_breg15 = 0x7f,
DW_OP_breg16 = 0x80,
DW_OP_breg17 = 0x81,
DW_OP_breg18 = 0x82,
DW_OP_breg19 = 0x83,
DW_OP_breg20 = 0x84,
DW_OP_breg21 = 0x85,
DW_OP_breg22 = 0x86,
DW_OP_breg23 = 0x87,
DW_OP_breg24 = 0x88,
DW_OP_breg25 = 0x89,
DW_OP_breg26 = 0x8a,
DW_OP_breg27 = 0x8b,
DW_OP_breg28 = 0x8c,
DW_OP_breg29 = 0x8d,
DW_OP_breg30 = 0x8e,
DW_OP_breg31 = 0x8f,
DW_OP_regx = 0x90,
DW_OP_fbreg = 0x91,
DW_OP_bregx = 0x92,
DW_OP_piece = 0x93,
DW_OP_deref_size = 0x94,
DW_OP_xderef_size = 0x95,
DW_OP_nop = 0x96,
DW_OP_push_object_address = 0x97,
DW_OP_call2 = 0x98,
DW_OP_call4 = 0x99,
DW_OP_call_ref = 0x9a,
DW_OP_form_tls_address = 0x9b,
DW_OP_call_frame_cfa = 0x9c,
DW_OP_bit_piece = 0x9d,
DW_OP_lo_user = 0xe0,
DW_OP_hi_user = 0xff,
DW_OP_GNU_push_tls_address = 0xe0,
DW_OP_GNU_uninit = 0xf0,
DW_OP_GNU_encoded_addr = 0xf1,
};
#define DW_EH_PE_native 0x00
#define DW_EH_PE_leb128 0x01
#define DW_EH_PE_data2 0x02
#define DW_EH_PE_data4 0x03
#define DW_EH_PE_data8 0x04
#define DW_EH_PE_signed 0x08
#define DW_EH_PE_abs 0x00
#define DW_EH_PE_pcrel 0x10
#define DW_EH_PE_textrel 0x20
#define DW_EH_PE_datarel 0x30
#define DW_EH_PE_funcrel 0x40
#define DW_EH_PE_aligned 0x50
#define DW_EH_PE_indirect 0x80
#define DW_EH_PE_omit 0xff
struct dwarf_eh_bases
{
void *tbase;
void *dbase;
void *func;
};
struct dwarf_cie
{
unsigned int length;
int id;
unsigned char version;
unsigned char augmentation[1];
};
struct dwarf_fde
{
unsigned int length;
unsigned int cie_offset;
};
extern const struct dwarf_fde *_Unwind_Find_FDE (void *, struct dwarf_eh_bases *);
static unsigned char dwarf_get_u1( const unsigned char **p )
{
return *(*p)++;
}
static unsigned short dwarf_get_u2( const unsigned char **p )
{
unsigned int ret = (*p)[0] | ((*p)[1] << 8);
(*p) += 2;
return ret;
}
static unsigned int dwarf_get_u4( const unsigned char **p )
{
unsigned int ret = (*p)[0] | ((*p)[1] << 8) | ((*p)[2] << 16) | ((*p)[3] << 24);
(*p) += 4;
return ret;
}
static ULONG64 dwarf_get_u8( const unsigned char **p )
{
ULONG64 low = dwarf_get_u4( p );
ULONG64 high = dwarf_get_u4( p );
return low | (high << 32);
}
static ULONG_PTR dwarf_get_uleb128( const unsigned char **p )
{
ULONG_PTR ret = 0;
unsigned int shift = 0;
unsigned char byte;
do
{
byte = **p;
ret |= (ULONG_PTR)(byte & 0x7f) << shift;
shift += 7;
(*p)++;
} while (byte & 0x80);
return ret;
}
static LONG_PTR dwarf_get_sleb128( const unsigned char **p )
{
ULONG_PTR ret = 0;
unsigned int shift = 0;
unsigned char byte;
do
{
byte = **p;
ret |= (ULONG_PTR)(byte & 0x7f) << shift;
shift += 7;
(*p)++;
} while (byte & 0x80);
if ((shift < 8 * sizeof(ret)) && (byte & 0x40)) ret |= -((ULONG_PTR)1 << shift);
return ret;
}
static ULONG_PTR dwarf_get_ptr( const unsigned char **p, unsigned char encoding )
{
ULONG_PTR base;
if (encoding == DW_EH_PE_omit) return 0;
switch (encoding & 0xf0)
{
case DW_EH_PE_abs:
base = 0;
break;
case DW_EH_PE_pcrel:
base = (ULONG_PTR)*p;
break;
default:
FIXME( "unsupported encoding %02x\n", encoding );
return 0;
}
switch (encoding & 0x0f)
{
case DW_EH_PE_native:
return base + dwarf_get_u8( p );
case DW_EH_PE_leb128:
return base + dwarf_get_uleb128( p );
case DW_EH_PE_data2:
return base + dwarf_get_u2( p );
case DW_EH_PE_data4:
return base + dwarf_get_u4( p );
case DW_EH_PE_data8:
return base + dwarf_get_u8( p );
case DW_EH_PE_signed|DW_EH_PE_leb128:
return base + dwarf_get_sleb128( p );
case DW_EH_PE_signed|DW_EH_PE_data2:
return base + (signed short)dwarf_get_u2( p );
case DW_EH_PE_signed|DW_EH_PE_data4:
return base + (signed int)dwarf_get_u4( p );
case DW_EH_PE_signed|DW_EH_PE_data8:
return base + (LONG64)dwarf_get_u8( p );
default:
FIXME( "unsupported encoding %02x\n", encoding );
return 0;
}
}
enum reg_rule
{
RULE_UNSET, /* not set at all */
RULE_UNDEFINED, /* undefined value */
RULE_SAME, /* same value as previous frame */
RULE_CFA_OFFSET, /* stored at cfa offset */
RULE_OTHER_REG, /* stored in other register */
RULE_EXPRESSION, /* address specified by expression */
RULE_VAL_EXPRESSION /* value specified by expression */
};
#define NB_FRAME_REGS 41
#define MAX_SAVED_STATES 16
struct frame_state
{
ULONG_PTR cfa_offset;
unsigned char cfa_reg;
enum reg_rule cfa_rule;
enum reg_rule rules[NB_FRAME_REGS];
ULONG64 regs[NB_FRAME_REGS];
};
struct frame_info
{
ULONG_PTR ip;
ULONG_PTR code_align;
LONG_PTR data_align;
unsigned char retaddr_reg;
unsigned char fde_encoding;
unsigned char signal_frame;
unsigned char state_sp;
struct frame_state state;
struct frame_state *state_stack;
};
static const char *dwarf_reg_names[NB_FRAME_REGS] =
{
/* 0-7 */ "%rax", "%rdx", "%rcx", "%rbx", "%rsi", "%rdi", "%rbp", "%rsp",
/* 8-16 */ "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", "%rip",
/* 17-24 */ "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7",
/* 25-32 */ "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm12", "%xmm13", "%xmm14", "%xmm15",
/* 33-40 */ "%st0", "%st1", "%st2", "%st3", "%st4", "%st5", "%st6", "%st7"
};
static BOOL valid_reg( ULONG_PTR reg )
{
if (reg >= NB_FRAME_REGS) FIXME( "unsupported reg %lx\n", reg );
return (reg < NB_FRAME_REGS);
}
static void execute_cfa_instructions( const unsigned char *ptr, const unsigned char *end,
ULONG_PTR last_ip, struct frame_info *info )
{
while (ptr < end && info->ip < last_ip + info->signal_frame)
{
enum dwarf_call_frame_info op = *ptr++;
if (op & 0xc0)
{
switch (op & 0xc0)
{
case DW_CFA_advance_loc:
{
ULONG_PTR offset = (op & 0x3f) * info->code_align;
TRACE( "%lx: DW_CFA_advance_loc %lu\n", info->ip, offset );
info->ip += offset;
break;
}
case DW_CFA_offset:
{
ULONG_PTR reg = op & 0x3f;
LONG_PTR offset = dwarf_get_uleb128( &ptr ) * info->data_align;
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_offset %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
info->state.regs[reg] = offset;
info->state.rules[reg] = RULE_CFA_OFFSET;
break;
}
case DW_CFA_restore:
{
ULONG_PTR reg = op & 0x3f;
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_restore %s\n", info->ip, dwarf_reg_names[reg] );
info->state.rules[reg] = RULE_UNSET;
break;
}
}
}
else switch (op)
{
case DW_CFA_nop:
break;
case DW_CFA_set_loc:
{
ULONG_PTR loc = dwarf_get_ptr( &ptr, info->fde_encoding );
TRACE( "%lx: DW_CFA_set_loc %lx\n", info->ip, loc );
info->ip = loc;
break;
}
case DW_CFA_advance_loc1:
{
ULONG_PTR offset = *ptr++ * info->code_align;
TRACE( "%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset );
info->ip += offset;
break;
}
case DW_CFA_advance_loc2:
{
ULONG_PTR offset = dwarf_get_u2( &ptr ) * info->code_align;
TRACE( "%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset );
info->ip += offset;
break;
}
case DW_CFA_advance_loc4:
{
ULONG_PTR offset = dwarf_get_u4( &ptr ) * info->code_align;
TRACE( "%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset );
info->ip += offset;
break;
}
case DW_CFA_offset_extended:
case DW_CFA_offset_extended_sf:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf_get_uleb128( &ptr ) * info->data_align
: dwarf_get_sleb128( &ptr ) * info->data_align;
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_offset_extended %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
info->state.regs[reg] = offset;
info->state.rules[reg] = RULE_CFA_OFFSET;
break;
}
case DW_CFA_restore_extended:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_restore_extended %s\n", info->ip, dwarf_reg_names[reg] );
info->state.rules[reg] = RULE_UNSET;
break;
}
case DW_CFA_undefined:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_undefined %s\n", info->ip, dwarf_reg_names[reg] );
info->state.rules[reg] = RULE_UNDEFINED;
break;
}
case DW_CFA_same_value:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_same_value %s\n", info->ip, dwarf_reg_names[reg] );
info->state.regs[reg] = reg;
info->state.rules[reg] = RULE_SAME;
break;
}
case DW_CFA_register:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
ULONG_PTR reg2 = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg ) || !valid_reg( reg2 )) break;
TRACE( "%lx: DW_CFA_register %s == %s\n", info->ip, dwarf_reg_names[reg], dwarf_reg_names[reg2] );
info->state.regs[reg] = reg2;
info->state.rules[reg] = RULE_OTHER_REG;
break;
}
case DW_CFA_remember_state:
TRACE( "%lx: DW_CFA_remember_state\n", info->ip );
if (info->state_sp >= MAX_SAVED_STATES)
FIXME( "%lx: DW_CFA_remember_state too many nested saves\n", info->ip );
else
info->state_stack[info->state_sp++] = info->state;
break;
case DW_CFA_restore_state:
TRACE( "%lx: DW_CFA_restore_state\n", info->ip );
if (!info->state_sp)
FIXME( "%lx: DW_CFA_restore_state without corresponding save\n", info->ip );
else
info->state = info->state_stack[--info->state_sp];
break;
case DW_CFA_def_cfa:
case DW_CFA_def_cfa_sf:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf_get_uleb128( &ptr )
: dwarf_get_sleb128( &ptr ) * info->data_align;
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_def_cfa %s, %lu\n", info->ip, dwarf_reg_names[reg], offset );
info->state.cfa_reg = reg;
info->state.cfa_offset = offset;
info->state.cfa_rule = RULE_CFA_OFFSET;
break;
}
case DW_CFA_def_cfa_register:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_def_cfa_register %s\n", info->ip, dwarf_reg_names[reg] );
info->state.cfa_reg = reg;
info->state.cfa_rule = RULE_CFA_OFFSET;
break;
}
case DW_CFA_def_cfa_offset:
case DW_CFA_def_cfa_offset_sf:
{
ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf_get_uleb128( &ptr )
: dwarf_get_sleb128( &ptr ) * info->data_align;
TRACE( "%lx: DW_CFA_def_cfa_offset %lu\n", info->ip, offset );
info->state.cfa_offset = offset;
info->state.cfa_rule = RULE_CFA_OFFSET;
break;
}
case DW_CFA_def_cfa_expression:
{
ULONG_PTR expr = (ULONG_PTR)ptr;
ULONG_PTR len = dwarf_get_uleb128( &ptr );
TRACE( "%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len );
info->state.cfa_offset = expr;
info->state.cfa_rule = RULE_VAL_EXPRESSION;
ptr += len;
break;
}
case DW_CFA_expression:
case DW_CFA_val_expression:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
ULONG_PTR expr = (ULONG_PTR)ptr;
ULONG_PTR len = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_%sexpression %s %lx-%lx\n",
info->ip, (op == DW_CFA_expression) ? "" : "val_", dwarf_reg_names[reg], expr, expr+len );
info->state.regs[reg] = expr;
info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
ptr += len;
break;
}
default:
FIXME( "%lx: unknown CFA opcode %02x\n", info->ip, op );
break;
}
}
}
/* retrieve a context register from its dwarf number */
static void *get_context_reg( CONTEXT *context, ULONG_PTR dw_reg )
{
switch (dw_reg)
{
case 0: return &context->Rax;
case 1: return &context->Rdx;
case 2: return &context->Rcx;
case 3: return &context->Rbx;
case 4: return &context->Rsi;
case 5: return &context->Rdi;
case 6: return &context->Rbp;
case 7: return &context->Rsp;
case 8: return &context->R8;
case 9: return &context->R9;
case 10: return &context->R10;
case 11: return &context->R11;
case 12: return &context->R12;
case 13: return &context->R13;
case 14: return &context->R14;
case 15: return &context->R15;
case 16: return &context->Rip;
case 17: return &context->u.s.Xmm0;
case 18: return &context->u.s.Xmm1;
case 19: return &context->u.s.Xmm2;
case 20: return &context->u.s.Xmm3;
case 21: return &context->u.s.Xmm4;
case 22: return &context->u.s.Xmm5;
case 23: return &context->u.s.Xmm6;
case 24: return &context->u.s.Xmm7;
case 25: return &context->u.s.Xmm8;
case 26: return &context->u.s.Xmm9;
case 27: return &context->u.s.Xmm10;
case 28: return &context->u.s.Xmm11;
case 29: return &context->u.s.Xmm12;
case 30: return &context->u.s.Xmm13;
case 31: return &context->u.s.Xmm14;
case 32: return &context->u.s.Xmm15;
case 33: return &context->u.s.Legacy[0];
case 34: return &context->u.s.Legacy[1];
case 35: return &context->u.s.Legacy[2];
case 36: return &context->u.s.Legacy[3];
case 37: return &context->u.s.Legacy[4];
case 38: return &context->u.s.Legacy[5];
case 39: return &context->u.s.Legacy[6];
case 40: return &context->u.s.Legacy[7];
default: return NULL;
}
}
/* set a context register from its dwarf number */
static void set_context_reg( CONTEXT *context, ULONG_PTR dw_reg, void *val )
{
switch (dw_reg)
{
case 0: context->Rax = *(ULONG64 *)val; break;
case 1: context->Rdx = *(ULONG64 *)val; break;
case 2: context->Rcx = *(ULONG64 *)val; break;
case 3: context->Rbx = *(ULONG64 *)val; break;
case 4: context->Rsi = *(ULONG64 *)val; break;
case 5: context->Rdi = *(ULONG64 *)val; break;
case 6: context->Rbp = *(ULONG64 *)val; break;
case 7: context->Rsp = *(ULONG64 *)val; break;
case 8: context->R8 = *(ULONG64 *)val; break;
case 9: context->R9 = *(ULONG64 *)val; break;
case 10: context->R10 = *(ULONG64 *)val; break;
case 11: context->R11 = *(ULONG64 *)val; break;
case 12: context->R12 = *(ULONG64 *)val; break;
case 13: context->R13 = *(ULONG64 *)val; break;
case 14: context->R14 = *(ULONG64 *)val; break;
case 15: context->R15 = *(ULONG64 *)val; break;
case 16: context->Rip = *(ULONG64 *)val; break;
case 17: memcpy( &context->u.s.Xmm0, val, sizeof(M128A) ); break;
case 18: memcpy( &context->u.s.Xmm1, val, sizeof(M128A) ); break;
case 19: memcpy( &context->u.s.Xmm2, val, sizeof(M128A) ); break;
case 20: memcpy( &context->u.s.Xmm3, val, sizeof(M128A) ); break;
case 21: memcpy( &context->u.s.Xmm4, val, sizeof(M128A) ); break;
case 22: memcpy( &context->u.s.Xmm5, val, sizeof(M128A) ); break;
case 23: memcpy( &context->u.s.Xmm6, val, sizeof(M128A) ); break;
case 24: memcpy( &context->u.s.Xmm7, val, sizeof(M128A) ); break;
case 25: memcpy( &context->u.s.Xmm8, val, sizeof(M128A) ); break;
case 26: memcpy( &context->u.s.Xmm9, val, sizeof(M128A) ); break;
case 27: memcpy( &context->u.s.Xmm10, val, sizeof(M128A) ); break;
case 28: memcpy( &context->u.s.Xmm11, val, sizeof(M128A) ); break;
case 29: memcpy( &context->u.s.Xmm12, val, sizeof(M128A) ); break;
case 30: memcpy( &context->u.s.Xmm13, val, sizeof(M128A) ); break;
case 31: memcpy( &context->u.s.Xmm14, val, sizeof(M128A) ); break;
case 32: memcpy( &context->u.s.Xmm15, val, sizeof(M128A) ); break;
case 33: memcpy( &context->u.s.Legacy[0], val, sizeof(M128A) ); break;
case 34: memcpy( &context->u.s.Legacy[1], val, sizeof(M128A) ); break;
case 35: memcpy( &context->u.s.Legacy[2], val, sizeof(M128A) ); break;
case 36: memcpy( &context->u.s.Legacy[3], val, sizeof(M128A) ); break;
case 37: memcpy( &context->u.s.Legacy[4], val, sizeof(M128A) ); break;
case 38: memcpy( &context->u.s.Legacy[5], val, sizeof(M128A) ); break;
case 39: memcpy( &context->u.s.Legacy[6], val, sizeof(M128A) ); break;
case 40: memcpy( &context->u.s.Legacy[7], val, sizeof(M128A) ); break;
}
}
static ULONG_PTR eval_expression( const unsigned char *p, CONTEXT *context )
{
ULONG_PTR reg, tmp, stack[64];
int sp = -1;
ULONG_PTR len = dwarf_get_uleb128(&p);
const unsigned char *end = p + len;
while (p < end)
{
unsigned char opcode = dwarf_get_u1(&p);
if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
stack[++sp] = opcode - DW_OP_lit0;
else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_reg0 );
else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_breg0 ) + dwarf_get_sleb128(&p);
else switch (opcode)
{
case DW_OP_nop: break;
case DW_OP_addr: stack[++sp] = dwarf_get_u8(&p); break;
case DW_OP_const1u: stack[++sp] = dwarf_get_u1(&p); break;
case DW_OP_const1s: stack[++sp] = (signed char)dwarf_get_u1(&p); break;
case DW_OP_const2u: stack[++sp] = dwarf_get_u2(&p); break;
case DW_OP_const2s: stack[++sp] = (short)dwarf_get_u2(&p); break;
case DW_OP_const4u: stack[++sp] = dwarf_get_u4(&p); break;
case DW_OP_const4s: stack[++sp] = (signed int)dwarf_get_u4(&p); break;
case DW_OP_const8u: stack[++sp] = dwarf_get_u8(&p); break;
case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf_get_u8(&p); break;
case DW_OP_constu: stack[++sp] = dwarf_get_uleb128(&p); break;
case DW_OP_consts: stack[++sp] = dwarf_get_sleb128(&p); break;
case DW_OP_deref: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
case DW_OP_drop: sp--; break;
case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf_get_u1(&p)]; sp++; break;
case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
case DW_OP_abs: stack[sp] = labs(stack[sp]); break;
case DW_OP_neg: stack[sp] = -stack[sp]; break;
case DW_OP_not: stack[sp] = ~stack[sp]; break;
case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
case DW_OP_plus_uconst: stack[sp] += dwarf_get_uleb128(&p); break;
case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
case DW_OP_skip: tmp = (short)dwarf_get_u2(&p); p += tmp; break;
case DW_OP_bra: tmp = (short)dwarf_get_u2(&p); if (!stack[sp--]) p += tmp; break;
case DW_OP_GNU_encoded_addr: tmp = *p++; stack[++sp] = dwarf_get_ptr( &p, tmp ); break;
case DW_OP_regx: stack[++sp] = *(ULONG_PTR *)get_context_reg( context, dwarf_get_uleb128(&p) ); break;
case DW_OP_bregx:
reg = dwarf_get_uleb128(&p);
tmp = dwarf_get_sleb128(&p);
stack[++sp] = *(ULONG_PTR *)get_context_reg( context, reg ) + tmp;
break;
case DW_OP_deref_size:
switch (*p++)
{
case 1: stack[sp] = *(unsigned char *)stack[sp]; break;
case 2: stack[sp] = *(unsigned short *)stack[sp]; break;
case 4: stack[sp] = *(unsigned int *)stack[sp]; break;
case 8: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
}
break;
default:
FIXME( "unhandled opcode %02x\n", opcode );
}
}
return stack[sp];
}
/* apply the computed frame info to the actual context */
static void apply_frame_state( CONTEXT *context, struct frame_state *state )
{
unsigned int i;
ULONG_PTR cfa, value;
CONTEXT new_context = *context;
switch (state->cfa_rule)
{
case RULE_EXPRESSION:
cfa = *(ULONG_PTR *)eval_expression( (const unsigned char *)state->cfa_offset, context );
break;
case RULE_VAL_EXPRESSION:
cfa = eval_expression( (const unsigned char *)state->cfa_offset, context );
break;
default:
cfa = *(ULONG_PTR *)get_context_reg( context, state->cfa_reg ) + state->cfa_offset;
break;
}
if (!cfa) return;
for (i = 0; i < NB_FRAME_REGS; i++)
{
switch (state->rules[i])
{
case RULE_UNSET:
case RULE_UNDEFINED:
case RULE_SAME:
break;
case RULE_CFA_OFFSET:
set_context_reg( &new_context, i, (char *)cfa + state->regs[i] );
break;
case RULE_OTHER_REG:
set_context_reg( &new_context, i, get_context_reg( context, state->regs[i] ));
break;
case RULE_EXPRESSION:
value = eval_expression( (const unsigned char *)state->regs[i], context );
set_context_reg( &new_context, i, (void *)value );
break;
case RULE_VAL_EXPRESSION:
value = eval_expression( (const unsigned char *)state->regs[i], context );
set_context_reg( &new_context, i, &value );
break;
}
}
new_context.Rsp = cfa;
*context = new_context;
}
/***********************************************************************
* dwarf_virtual_unwind
*
* Equivalent of RtlVirtualUnwind for builtin modules.
*/
static NTSTATUS dwarf_virtual_unwind( ULONG64 ip, ULONG64 *frame,CONTEXT *context,
const struct dwarf_fde *fde, const struct dwarf_eh_bases *bases,
PEXCEPTION_ROUTINE *handler, void **handler_data )
{
const struct dwarf_cie *cie;
const unsigned char *ptr, *augmentation, *end;
ULONG_PTR len, code_end;
struct frame_info info;
struct frame_state state_stack[MAX_SAVED_STATES];
int aug_z_format = 0;
unsigned char lsda_encoding = DW_EH_PE_omit;
memset( &info, 0, sizeof(info) );
info.state_stack = state_stack;
info.ip = (ULONG_PTR)bases->func;
*handler = NULL;
cie = (const struct dwarf_cie *)((const char *)&fde->cie_offset - fde->cie_offset);
/* parse the CIE first */
if (cie->version != 1 && cie->version != 3)
{
FIXME( "unknown CIE version %u at %p\n", cie->version, cie );
return STATUS_INVALID_DISPOSITION;
}
ptr = cie->augmentation + strlen((const char *)cie->augmentation) + 1;
info.code_align = dwarf_get_uleb128( &ptr );
info.data_align = dwarf_get_sleb128( &ptr );
if (cie->version == 1)
info.retaddr_reg = *ptr++;
else
info.retaddr_reg = dwarf_get_uleb128( &ptr );
info.state.cfa_rule = RULE_CFA_OFFSET;
TRACE( "function %lx base %p cie %p len %x id %x version %x aug '%s' code_align %lu data_align %ld retaddr %s\n",
ip, bases->func, cie, cie->length, cie->id, cie->version, cie->augmentation,
info.code_align, info.data_align, dwarf_reg_names[info.retaddr_reg] );
end = NULL;
for (augmentation = cie->augmentation; *augmentation; augmentation++)
{
switch (*augmentation)
{
case 'z':
len = dwarf_get_uleb128( &ptr );
end = ptr + len;
aug_z_format = 1;
continue;
case 'L':
lsda_encoding = *ptr++;
continue;
case 'P':
{
unsigned char encoding = *ptr++;
*handler = (void *)dwarf_get_ptr( &ptr, encoding );
continue;
}
case 'R':
info.fde_encoding = *ptr++;
continue;
case 'S':
info.signal_frame = 1;
continue;
}
FIXME( "unknown augmentation '%c'\n", *augmentation );
if (!end) return STATUS_INVALID_DISPOSITION; /* cannot continue */
break;
}
if (end) ptr = end;
end = (const unsigned char *)(&cie->length + 1) + cie->length;
execute_cfa_instructions( ptr, end, ip, &info );
ptr = (const unsigned char *)(fde + 1);
info.ip = dwarf_get_ptr( &ptr, info.fde_encoding ); /* fde code start */
code_end = info.ip + dwarf_get_ptr( &ptr, info.fde_encoding & 0x0f ); /* fde code length */
if (aug_z_format) /* get length of augmentation data */
{
len = dwarf_get_uleb128( &ptr );
end = ptr + len;
}
else end = NULL;
*handler_data = (void *)dwarf_get_ptr( &ptr, lsda_encoding );
if (end) ptr = end;
end = (const unsigned char *)(&fde->length + 1) + fde->length;
TRACE( "fde %p len %x personality %p lsda %p code %lx-%lx\n",
fde, fde->length, *handler, *handler_data, info.ip, code_end );
execute_cfa_instructions( ptr, end, ip, &info );
*frame = context->Rsp;
apply_frame_state( context, &info.state );
TRACE( "next function rip=%016lx\n", context->Rip );
TRACE( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
context->Rax, context->Rbx, context->Rcx, context->Rdx );
TRACE( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
context->Rsi, context->Rdi, context->Rbp, context->Rsp );
TRACE( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
context->R8, context->R9, context->R10, context->R11 );
TRACE( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
context->R12, context->R13, context->R14, context->R15 );
return STATUS_SUCCESS;
}
#ifdef HAVE_LIBUNWIND_H
/***********************************************************************
* libunwind_set_cursor_from_context
*/
static int libunwind_set_cursor_from_context( unw_cursor_t *cursor, CONTEXT *context, ULONG64 ip )
{
int rc;
rc = unw_set_reg(cursor, UNW_REG_IP, ip);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_REG_SP, context->Rsp);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_RAX, context->Rax);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_RDX, context->Rdx);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_RCX, context->Rcx);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_RBX, context->Rbx);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_RSI, context->Rsi);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_RDI, context->Rdi);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_RBP, context->Rbp);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_R8, context->R8);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_R9, context->R9);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_R10, context->R10);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_R11, context->R11);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_R12, context->R12);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_R13, context->R13);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_R14, context->R14);
if (rc == UNW_ESUCCESS)
rc = unw_set_reg(cursor, UNW_X86_64_R15, context->R15);
return rc;
}
/***********************************************************************
* libunwind_get_reg
*/
static int libunwind_get_reg( unw_cursor_t *cursor, unw_regnum_t reg, ULONG64 *val )
{
int rc;
unw_word_t word;
rc = unw_get_reg(cursor, reg, &word);
if (rc == UNW_ESUCCESS)
*val = word;
return rc;
}
/***********************************************************************
* libunwind_set_context_from_cursor
*/
static BOOL libunwind_set_context_from_cursor( CONTEXT *context, unw_cursor_t *cursor )
{
int rc;
rc = libunwind_get_reg(cursor, UNW_REG_IP, &context->Rip);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_REG_SP, &context->Rsp);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_RAX, &context->Rax);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_RDX, &context->Rdx);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_RCX, &context->Rcx);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_RBX, &context->Rbx);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_RSI, &context->Rsi);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_RDI, &context->Rdi);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_RBP, &context->Rbp);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_R8, &context->R8);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_R9, &context->R9);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_R10, &context->R10);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_R11, &context->R11);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_R12, &context->R12);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_R13, &context->R13);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_R14, &context->R14);
if (rc == UNW_ESUCCESS)
rc = libunwind_get_reg(cursor, UNW_X86_64_R15, &context->R15);
return rc;
}
/***********************************************************************
* libunwind_virtual_unwind
*
* Equivalent of RtlVirtualUnwind for builtin modules.
*/
static NTSTATUS libunwind_virtual_unwind( ULONG64 ip, BOOL* got_info, ULONG64 *frame, CONTEXT *context,
PEXCEPTION_ROUTINE *handler, void **handler_data )
{
unw_context_t unw_context;
unw_cursor_t cursor;
unw_proc_info_t info;
int rc;
rc = unw_getcontext( &unw_context );
if (rc == UNW_ESUCCESS)
rc = unw_init_local( &cursor, &unw_context );
if (rc == UNW_ESUCCESS)
rc = libunwind_set_cursor_from_context( &cursor, context, ip - 1 );
if (rc != UNW_ESUCCESS)
{
WARN( "setup failed: %d\n", rc );
return STATUS_INVALID_DISPOSITION;
}
rc = unw_get_proc_info(&cursor, &info);
if (rc != UNW_ESUCCESS && rc != UNW_ENOINFO)
{
WARN( "failed to get info: %d\n", rc );
return STATUS_INVALID_DISPOSITION;
}
if (rc == UNW_ENOINFO || ip < info.start_ip || info.end_ip <= ip || !info.format)
{
*got_info = FALSE;
return STATUS_SUCCESS;
}
TRACE( "ip %#lx function %#lx-%#lx personality %#lx lsda %#lx fde %#lx\n",
ip, (unsigned long)info.start_ip, (unsigned long)info.end_ip, (unsigned long)info.handler,
(unsigned long)info.lsda, (unsigned long)info.unwind_info );
rc = unw_step(&cursor);
if (rc < 0)
{
WARN( "failed to unwind: %d\n", rc );
return STATUS_INVALID_DISPOSITION;
}
*frame = context->Rsp;
rc = libunwind_set_context_from_cursor( context, &cursor );
if (rc != UNW_ESUCCESS)
{
WARN( "failed to update context after unwind: %d\n", rc );
return STATUS_INVALID_DISPOSITION;
}
*handler = (void*)info.handler;
*handler_data = (void*)info.lsda;
*got_info = TRUE;
TRACE( "next function rip=%016lx\n", context->Rip );
TRACE( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
context->Rax, context->Rbx, context->Rcx, context->Rdx );
TRACE( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
context->Rsi, context->Rdi, context->Rbp, context->Rsp );
TRACE( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
context->R8, context->R9, context->R10, context->R11 );
TRACE( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
context->R12, context->R13, context->R14, context->R15 );
return STATUS_SUCCESS;
}
#endif
/***********************************************************************
* dispatch_signal
*/
static inline int dispatch_signal(unsigned int sig)
{
if (handlers[sig] == NULL) return 0;
return handlers[sig](sig);
}
/***********************************************************************
* get_signal_stack
*
* Get the base of the signal stack for the current thread.
*/
static inline void *get_signal_stack(void)
{
return (char *)NtCurrentTeb() + teb_size;
}
/***********************************************************************
* is_inside_signal_stack
*
* Check if pointer is inside the signal stack.
*/
static inline BOOL is_inside_signal_stack( void *ptr )
{
return ((char *)ptr >= (char *)get_signal_stack() &&
(char *)ptr < (char *)get_signal_stack() + signal_stack_size);
}
/***********************************************************************
* save_context
*
* Set the register values from a sigcontext.
*/
static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
{
context->ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS;
context->Rax = RAX_sig(sigcontext);
context->Rcx = RCX_sig(sigcontext);
context->Rdx = RDX_sig(sigcontext);
context->Rbx = RBX_sig(sigcontext);
context->Rsp = RSP_sig(sigcontext);
context->Rbp = RBP_sig(sigcontext);
context->Rsi = RSI_sig(sigcontext);
context->Rdi = RDI_sig(sigcontext);
context->R8 = R8_sig(sigcontext);
context->R9 = R9_sig(sigcontext);
context->R10 = R10_sig(sigcontext);
context->R11 = R11_sig(sigcontext);
context->R12 = R12_sig(sigcontext);
context->R13 = R13_sig(sigcontext);
context->R14 = R14_sig(sigcontext);
context->R15 = R15_sig(sigcontext);
context->Rip = RIP_sig(sigcontext);
context->SegCs = CS_sig(sigcontext);
context->SegFs = FS_sig(sigcontext);
context->SegGs = GS_sig(sigcontext);
context->EFlags = EFL_sig(sigcontext);
#ifdef DS_sig
context->SegDs = DS_sig(sigcontext);
#else
__asm__("movw %%ds,%0" : "=m" (context->SegDs));
#endif
#ifdef ES_sig
context->SegEs = ES_sig(sigcontext);
#else
__asm__("movw %%es,%0" : "=m" (context->SegEs));
#endif
#ifdef SS_sig
context->SegSs = SS_sig(sigcontext);
#else
__asm__("movw %%ss,%0" : "=m" (context->SegSs));
#endif
context->Dr0 = amd64_thread_data()->dr0;
context->Dr1 = amd64_thread_data()->dr1;
context->Dr2 = amd64_thread_data()->dr2;
context->Dr3 = amd64_thread_data()->dr3;
context->Dr6 = amd64_thread_data()->dr6;
context->Dr7 = amd64_thread_data()->dr7;
if (FPU_sig(sigcontext))
{
context->ContextFlags |= CONTEXT_FLOATING_POINT;
context->u.FltSave = *FPU_sig(sigcontext);
context->MxCsr = context->u.FltSave.MxCsr;
}
}
/***********************************************************************
* restore_context
*
* Build a sigcontext from the register values.
*/
static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
{
amd64_thread_data()->dr0 = context->Dr0;
amd64_thread_data()->dr1 = context->Dr1;
amd64_thread_data()->dr2 = context->Dr2;
amd64_thread_data()->dr3 = context->Dr3;
amd64_thread_data()->dr6 = context->Dr6;
amd64_thread_data()->dr7 = context->Dr7;
RAX_sig(sigcontext) = context->Rax;
RCX_sig(sigcontext) = context->Rcx;
RDX_sig(sigcontext) = context->Rdx;
RBX_sig(sigcontext) = context->Rbx;
RSP_sig(sigcontext) = context->Rsp;
RBP_sig(sigcontext) = context->Rbp;
RSI_sig(sigcontext) = context->Rsi;
RDI_sig(sigcontext) = context->Rdi;
R8_sig(sigcontext) = context->R8;
R9_sig(sigcontext) = context->R9;
R10_sig(sigcontext) = context->R10;
R11_sig(sigcontext) = context->R11;
R12_sig(sigcontext) = context->R12;
R13_sig(sigcontext) = context->R13;
R14_sig(sigcontext) = context->R14;
R15_sig(sigcontext) = context->R15;
RIP_sig(sigcontext) = context->Rip;
CS_sig(sigcontext) = context->SegCs;
FS_sig(sigcontext) = context->SegFs;
GS_sig(sigcontext) = context->SegGs;
EFL_sig(sigcontext) = context->EFlags;
#ifdef DS_sig
DS_sig(sigcontext) = context->SegDs;
#endif
#ifdef ES_sig
ES_sig(sigcontext) = context->SegEs;
#endif
#ifdef SS_sig
SS_sig(sigcontext) = context->SegSs;
#endif
if (FPU_sig(sigcontext)) *FPU_sig(sigcontext) = context->u.FltSave;
}
/**************************************************************************
* __chkstk (NTDLL.@)
*
* Supposed to touch all the stack pages, but we shouldn't need that.
*/
__ASM_GLOBAL_FUNC( __chkstk, "ret" );
/***********************************************************************
* RtlCaptureContext (NTDLL.@)
*/
__ASM_GLOBAL_FUNC( RtlCaptureContext,
"pushfq\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
"movl $0x001000f,0x30(%rcx)\n\t" /* context->ContextFlags */
"stmxcsr 0x34(%rcx)\n\t" /* context->MxCsr */
"movw %cs,0x38(%rcx)\n\t" /* context->SegCs */
"movw %ds,0x3a(%rcx)\n\t" /* context->SegDs */
"movw %es,0x3c(%rcx)\n\t" /* context->SegEs */
"movw %fs,0x3e(%rcx)\n\t" /* context->SegFs */
"movw %gs,0x40(%rcx)\n\t" /* context->SegGs */
"movw %ss,0x42(%rcx)\n\t" /* context->SegSs */
"popq 0x44(%rcx)\n\t" /* context->Eflags */
__ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
"movq %rax,0x78(%rcx)\n\t" /* context->Rax */
"movq %rcx,0x80(%rcx)\n\t" /* context->Rcx */
"movq %rdx,0x88(%rcx)\n\t" /* context->Rdx */
"movq %rbx,0x90(%rcx)\n\t" /* context->Rbx */
"leaq 8(%rsp),%rax\n\t"
"movq %rax,0x98(%rcx)\n\t" /* context->Rsp */
"movq %rbp,0xa0(%rcx)\n\t" /* context->Rbp */
"movq %rsi,0xa8(%rcx)\n\t" /* context->Rsi */
"movq %rdi,0xb0(%rcx)\n\t" /* context->Rdi */
"movq %r8,0xb8(%rcx)\n\t" /* context->R8 */
"movq %r9,0xc0(%rcx)\n\t" /* context->R9 */
"movq %r10,0xc8(%rcx)\n\t" /* context->R10 */
"movq %r11,0xd0(%rcx)\n\t" /* context->R11 */
"movq %r12,0xd8(%rcx)\n\t" /* context->R12 */
"movq %r13,0xe0(%rcx)\n\t" /* context->R13 */
"movq %r14,0xe8(%rcx)\n\t" /* context->R14 */
"movq %r15,0xf0(%rcx)\n\t" /* context->R15 */
"movq (%rsp),%rax\n\t"
"movq %rax,0xf8(%rcx)\n\t" /* context->Rip */
"fxsave 0x100(%rcx)\n\t" /* context->FtlSave */
"movdqa %xmm0,0x1a0(%rcx)\n\t" /* context->Xmm0 */
"movdqa %xmm1,0x1b0(%rcx)\n\t" /* context->Xmm1 */
"movdqa %xmm2,0x1c0(%rcx)\n\t" /* context->Xmm2 */
"movdqa %xmm3,0x1d0(%rcx)\n\t" /* context->Xmm3 */
"movdqa %xmm4,0x1e0(%rcx)\n\t" /* context->Xmm4 */
"movdqa %xmm5,0x1f0(%rcx)\n\t" /* context->Xmm5 */
"movdqa %xmm6,0x200(%rcx)\n\t" /* context->Xmm6 */
"movdqa %xmm7,0x210(%rcx)\n\t" /* context->Xmm7 */
"movdqa %xmm8,0x220(%rcx)\n\t" /* context->Xmm8 */
"movdqa %xmm9,0x230(%rcx)\n\t" /* context->Xmm9 */
"movdqa %xmm10,0x240(%rcx)\n\t" /* context->Xmm10 */
"movdqa %xmm11,0x250(%rcx)\n\t" /* context->Xmm11 */
"movdqa %xmm12,0x260(%rcx)\n\t" /* context->Xmm12 */
"movdqa %xmm13,0x270(%rcx)\n\t" /* context->Xmm13 */
"movdqa %xmm14,0x280(%rcx)\n\t" /* context->Xmm14 */
"movdqa %xmm15,0x290(%rcx)\n\t" /* context->Xmm15 */
"ret" );
/***********************************************************************
* set_full_cpu_context
*
* Set the new CPU context.
*/
extern void set_full_cpu_context( const CONTEXT *context );
__ASM_GLOBAL_FUNC( set_full_cpu_context,
"subq $40,%rsp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 40\n\t")
"ldmxcsr 0x34(%rdi)\n\t" /* context->MxCsr */
"movw 0x38(%rdi),%ax\n\t" /* context->SegCs */
"movq %rax,8(%rsp)\n\t"
"movw 0x42(%rdi),%ax\n\t" /* context->SegSs */
"movq %rax,32(%rsp)\n\t"
"movq 0x44(%rdi),%rax\n\t" /* context->Eflags */
"movq %rax,16(%rsp)\n\t"
"movq 0x80(%rdi),%rcx\n\t" /* context->Rcx */
"movq 0x88(%rdi),%rdx\n\t" /* context->Rdx */
"movq 0x90(%rdi),%rbx\n\t" /* context->Rbx */
"movq 0x98(%rdi),%rax\n\t" /* context->Rsp */
"movq %rax,24(%rsp)\n\t"
"movq 0xa0(%rdi),%rbp\n\t" /* context->Rbp */
"movq 0xa8(%rdi),%rsi\n\t" /* context->Rsi */
"movq 0xb8(%rdi),%r8\n\t" /* context->R8 */
"movq 0xc0(%rdi),%r9\n\t" /* context->R9 */
"movq 0xc8(%rdi),%r10\n\t" /* context->R10 */
"movq 0xd0(%rdi),%r11\n\t" /* context->R11 */
"movq 0xd8(%rdi),%r12\n\t" /* context->R12 */
"movq 0xe0(%rdi),%r13\n\t" /* context->R13 */
"movq 0xe8(%rdi),%r14\n\t" /* context->R14 */
"movq 0xf0(%rdi),%r15\n\t" /* context->R15 */
"movq 0xf8(%rdi),%rax\n\t" /* context->Rip */
"movq %rax,(%rsp)\n\t"
"fxrstor 0x100(%rdi)\n\t" /* context->FtlSave */
"movdqa 0x1a0(%rdi),%xmm0\n\t" /* context->Xmm0 */
"movdqa 0x1b0(%rdi),%xmm1\n\t" /* context->Xmm1 */
"movdqa 0x1c0(%rdi),%xmm2\n\t" /* context->Xmm2 */
"movdqa 0x1d0(%rdi),%xmm3\n\t" /* context->Xmm3 */
"movdqa 0x1e0(%rdi),%xmm4\n\t" /* context->Xmm4 */
"movdqa 0x1f0(%rdi),%xmm5\n\t" /* context->Xmm5 */
"movdqa 0x200(%rdi),%xmm6\n\t" /* context->Xmm6 */
"movdqa 0x210(%rdi),%xmm7\n\t" /* context->Xmm7 */
"movdqa 0x220(%rdi),%xmm8\n\t" /* context->Xmm8 */
"movdqa 0x230(%rdi),%xmm9\n\t" /* context->Xmm9 */
"movdqa 0x240(%rdi),%xmm10\n\t" /* context->Xmm10 */
"movdqa 0x250(%rdi),%xmm11\n\t" /* context->Xmm11 */
"movdqa 0x260(%rdi),%xmm12\n\t" /* context->Xmm12 */
"movdqa 0x270(%rdi),%xmm13\n\t" /* context->Xmm13 */
"movdqa 0x280(%rdi),%xmm14\n\t" /* context->Xmm14 */
"movdqa 0x290(%rdi),%xmm15\n\t" /* context->Xmm15 */
"movq 0x78(%rdi),%rax\n\t" /* context->Rax */
"movq 0xb0(%rdi),%rdi\n\t" /* context->Rdi */
"iretq" );
/***********************************************************************
* set_cpu_context
*
* Set the new CPU context. Used by NtSetContextThread.
*/
void DECLSPEC_HIDDEN set_cpu_context( const CONTEXT *context )
{
DWORD flags = context->ContextFlags & ~CONTEXT_AMD64;
if (flags & CONTEXT_DEBUG_REGISTERS)
{
amd64_thread_data()->dr0 = context->Dr0;
amd64_thread_data()->dr1 = context->Dr1;
amd64_thread_data()->dr2 = context->Dr2;
amd64_thread_data()->dr3 = context->Dr3;
amd64_thread_data()->dr6 = context->Dr6;
amd64_thread_data()->dr7 = context->Dr7;
}
if (flags & CONTEXT_FULL)
{
if (!(flags & CONTEXT_CONTROL))
FIXME( "setting partial context (%x) not supported\n", flags );
else
set_full_cpu_context( context );
}
}
/***********************************************************************
* get_server_context_flags
*
* Convert CPU-specific flags to generic server flags
*/
static unsigned int get_server_context_flags( DWORD flags )
{
unsigned int ret = 0;
flags &= ~CONTEXT_AMD64; /* get rid of CPU id */
if (flags & CONTEXT_CONTROL) ret |= SERVER_CTX_CONTROL;
if (flags & CONTEXT_INTEGER) ret |= SERVER_CTX_INTEGER;
if (flags & CONTEXT_SEGMENTS) ret |= SERVER_CTX_SEGMENTS;
if (flags & CONTEXT_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT;
if (flags & CONTEXT_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS;
return ret;
}
/***********************************************************************
* copy_context
*
* Copy a register context according to the flags.
*/
static void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags )
{
flags &= ~CONTEXT_AMD64; /* get rid of CPU id */
if (flags & CONTEXT_CONTROL)
{
to->Rbp = from->Rbp;
to->Rip = from->Rip;
to->Rsp = from->Rsp;
to->SegCs = from->SegCs;
to->SegSs = from->SegSs;
to->EFlags = from->EFlags;
}
if (flags & CONTEXT_INTEGER)
{
to->Rax = from->Rax;
to->Rcx = from->Rcx;
to->Rdx = from->Rdx;
to->Rbx = from->Rbx;
to->Rsi = from->Rsi;
to->Rdi = from->Rdi;
to->R8 = from->R8;
to->R9 = from->R9;
to->R10 = from->R10;
to->R11 = from->R11;
to->R12 = from->R12;
to->R13 = from->R13;
to->R14 = from->R14;
to->R15 = from->R15;
}
if (flags & CONTEXT_SEGMENTS)
{
to->SegDs = from->SegDs;
to->SegEs = from->SegEs;
to->SegFs = from->SegFs;
to->SegGs = from->SegGs;
}
if (flags & CONTEXT_FLOATING_POINT)
{
to->MxCsr = from->MxCsr;
to->u.FltSave = from->u.FltSave;
}
if (flags & CONTEXT_DEBUG_REGISTERS)
{
to->Dr0 = from->Dr0;
to->Dr1 = from->Dr1;
to->Dr2 = from->Dr2;
to->Dr3 = from->Dr3;
to->Dr6 = from->Dr6;
to->Dr7 = from->Dr7;
}
}
/***********************************************************************
* context_to_server
*
* Convert a register context to the server format.
*/
NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
{
DWORD flags = from->ContextFlags & ~CONTEXT_AMD64; /* get rid of CPU id */
memset( to, 0, sizeof(*to) );
to->cpu = CPU_x86_64;
if (flags & CONTEXT_CONTROL)
{
to->flags |= SERVER_CTX_CONTROL;
to->ctl.x86_64_regs.rbp = from->Rbp;
to->ctl.x86_64_regs.rip = from->Rip;
to->ctl.x86_64_regs.rsp = from->Rsp;
to->ctl.x86_64_regs.cs = from->SegCs;
to->ctl.x86_64_regs.ss = from->SegSs;
to->ctl.x86_64_regs.flags = from->EFlags;
}
if (flags & CONTEXT_INTEGER)
{
to->flags |= SERVER_CTX_INTEGER;
to->integer.x86_64_regs.rax = from->Rax;
to->integer.x86_64_regs.rcx = from->Rcx;
to->integer.x86_64_regs.rdx = from->Rdx;
to->integer.x86_64_regs.rbx = from->Rbx;
to->integer.x86_64_regs.rsi = from->Rsi;
to->integer.x86_64_regs.rdi = from->Rdi;
to->integer.x86_64_regs.r8 = from->R8;
to->integer.x86_64_regs.r9 = from->R9;
to->integer.x86_64_regs.r10 = from->R10;
to->integer.x86_64_regs.r11 = from->R11;
to->integer.x86_64_regs.r12 = from->R12;
to->integer.x86_64_regs.r13 = from->R13;
to->integer.x86_64_regs.r14 = from->R14;
to->integer.x86_64_regs.r15 = from->R15;
}
if (flags & CONTEXT_SEGMENTS)
{
to->flags |= SERVER_CTX_SEGMENTS;
to->seg.x86_64_regs.ds = from->SegDs;
to->seg.x86_64_regs.es = from->SegEs;
to->seg.x86_64_regs.fs = from->SegFs;
to->seg.x86_64_regs.gs = from->SegGs;
}
if (flags & CONTEXT_FLOATING_POINT)
{
to->flags |= SERVER_CTX_FLOATING_POINT;
memcpy( to->fp.x86_64_regs.fpregs, &from->u.FltSave, sizeof(to->fp.x86_64_regs.fpregs) );
}
if (flags & CONTEXT_DEBUG_REGISTERS)
{
to->flags |= SERVER_CTX_DEBUG_REGISTERS;
to->debug.x86_64_regs.dr0 = from->Dr0;
to->debug.x86_64_regs.dr1 = from->Dr1;
to->debug.x86_64_regs.dr2 = from->Dr2;
to->debug.x86_64_regs.dr3 = from->Dr3;
to->debug.x86_64_regs.dr6 = from->Dr6;
to->debug.x86_64_regs.dr7 = from->Dr7;
}
return STATUS_SUCCESS;
}
/***********************************************************************
* context_from_server
*
* Convert a register context from the server format.
*/
NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
{
if (from->cpu != CPU_x86_64) return STATUS_INVALID_PARAMETER;
to->ContextFlags = CONTEXT_AMD64;
if (from->flags & SERVER_CTX_CONTROL)
{
to->ContextFlags |= CONTEXT_CONTROL;
to->Rbp = from->ctl.x86_64_regs.rbp;
to->Rip = from->ctl.x86_64_regs.rip;
to->Rsp = from->ctl.x86_64_regs.rsp;
to->SegCs = from->ctl.x86_64_regs.cs;
to->SegSs = from->ctl.x86_64_regs.ss;
to->EFlags = from->ctl.x86_64_regs.flags;
}
if (from->flags & SERVER_CTX_INTEGER)
{
to->ContextFlags |= CONTEXT_INTEGER;
to->Rax = from->integer.x86_64_regs.rax;
to->Rcx = from->integer.x86_64_regs.rcx;
to->Rdx = from->integer.x86_64_regs.rdx;
to->Rbx = from->integer.x86_64_regs.rbx;
to->Rsi = from->integer.x86_64_regs.rsi;
to->Rdi = from->integer.x86_64_regs.rdi;
to->R8 = from->integer.x86_64_regs.r8;
to->R9 = from->integer.x86_64_regs.r9;
to->R10 = from->integer.x86_64_regs.r10;
to->R11 = from->integer.x86_64_regs.r11;
to->R12 = from->integer.x86_64_regs.r12;
to->R13 = from->integer.x86_64_regs.r13;
to->R14 = from->integer.x86_64_regs.r14;
to->R15 = from->integer.x86_64_regs.r15;
}
if (from->flags & SERVER_CTX_SEGMENTS)
{
to->ContextFlags |= CONTEXT_SEGMENTS;
to->SegDs = from->seg.x86_64_regs.ds;
to->SegEs = from->seg.x86_64_regs.es;
to->SegFs = from->seg.x86_64_regs.fs;
to->SegGs = from->seg.x86_64_regs.gs;
}
if (from->flags & SERVER_CTX_FLOATING_POINT)
{
to->ContextFlags |= CONTEXT_FLOATING_POINT;
memcpy( &to->u.FltSave, from->fp.x86_64_regs.fpregs, sizeof(from->fp.x86_64_regs.fpregs) );
to->MxCsr = to->u.FltSave.MxCsr;
}
if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
{
to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
to->Dr0 = from->debug.x86_64_regs.dr0;
to->Dr1 = from->debug.x86_64_regs.dr1;
to->Dr2 = from->debug.x86_64_regs.dr2;
to->Dr3 = from->debug.x86_64_regs.dr3;
to->Dr6 = from->debug.x86_64_regs.dr6;
to->Dr7 = from->debug.x86_64_regs.dr7;
}
return STATUS_SUCCESS;
}
/***********************************************************************
* NtSetContextThread (NTDLL.@)
* ZwSetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
{
NTSTATUS ret = STATUS_SUCCESS;
BOOL self = (handle == GetCurrentThread());
/* debug registers require a server call */
if (self && (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_AMD64)))
self = (amd64_thread_data()->dr0 == context->Dr0 &&
amd64_thread_data()->dr1 == context->Dr1 &&
amd64_thread_data()->dr2 == context->Dr2 &&
amd64_thread_data()->dr3 == context->Dr3 &&
amd64_thread_data()->dr6 == context->Dr6 &&
amd64_thread_data()->dr7 == context->Dr7);
if (!self)
{
context_t server_context;
context_to_server( &server_context, context );
ret = set_thread_context( handle, &server_context, &self );
}
if (self && ret == STATUS_SUCCESS) set_cpu_context( context );
return ret;
}
/***********************************************************************
* NtGetContextThread (NTDLL.@)
* ZwGetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
{
NTSTATUS ret;
DWORD needed_flags;
BOOL self = (handle == GetCurrentThread());
if (!context) return STATUS_INVALID_PARAMETER;
needed_flags = context->ContextFlags;
/* debug registers require a server call */
if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_AMD64)) self = FALSE;
if (!self)
{
context_t server_context;
unsigned int server_flags = get_server_context_flags( context->ContextFlags );
if ((ret = get_thread_context( handle, &server_context, server_flags, &self ))) return ret;
if ((ret = context_from_server( context, &server_context ))) return ret;
needed_flags &= ~context->ContextFlags;
}
if (self)
{
if (needed_flags)
{
CONTEXT ctx;
RtlCaptureContext( &ctx );
copy_context( context, &ctx, ctx.ContextFlags & needed_flags );
context->ContextFlags |= ctx.ContextFlags & needed_flags;
}
/* update the cached version of the debug registers */
if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_AMD64))
{
amd64_thread_data()->dr0 = context->Dr0;
amd64_thread_data()->dr1 = context->Dr1;
amd64_thread_data()->dr2 = context->Dr2;
amd64_thread_data()->dr3 = context->Dr3;
amd64_thread_data()->dr6 = context->Dr6;
amd64_thread_data()->dr7 = context->Dr7;
}
}
return STATUS_SUCCESS;
}
/***********************************************************************
* wow64_get_server_context_flags
*/
static unsigned int wow64_get_server_context_flags( DWORD flags )
{
unsigned int ret = 0;
flags &= ~WOW64_CONTEXT_i386; /* get rid of CPU id */
if (flags & WOW64_CONTEXT_CONTROL) ret |= SERVER_CTX_CONTROL;
if (flags & WOW64_CONTEXT_INTEGER) ret |= SERVER_CTX_INTEGER;
if (flags & WOW64_CONTEXT_SEGMENTS) ret |= SERVER_CTX_SEGMENTS;
if (flags & WOW64_CONTEXT_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT;
if (flags & WOW64_CONTEXT_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS;
if (flags & WOW64_CONTEXT_EXTENDED_REGISTERS) ret |= SERVER_CTX_EXTENDED_REGISTERS;
return ret;
}
/***********************************************************************
* wow64_context_from_server
*/
static NTSTATUS wow64_context_from_server( WOW64_CONTEXT *to, const context_t *from )
{
if (from->cpu != CPU_x86) return STATUS_INVALID_PARAMETER;
to->ContextFlags = WOW64_CONTEXT_i386;
if (from->flags & SERVER_CTX_CONTROL)
{
to->ContextFlags |= WOW64_CONTEXT_CONTROL;
to->Ebp = from->ctl.i386_regs.ebp;
to->Esp = from->ctl.i386_regs.esp;
to->Eip = from->ctl.i386_regs.eip;
to->SegCs = from->ctl.i386_regs.cs;
to->SegSs = from->ctl.i386_regs.ss;
to->EFlags = from->ctl.i386_regs.eflags;
}
if (from->flags & SERVER_CTX_INTEGER)
{
to->ContextFlags |= WOW64_CONTEXT_INTEGER;
to->Eax = from->integer.i386_regs.eax;
to->Ebx = from->integer.i386_regs.ebx;
to->Ecx = from->integer.i386_regs.ecx;
to->Edx = from->integer.i386_regs.edx;
to->Esi = from->integer.i386_regs.esi;
to->Edi = from->integer.i386_regs.edi;
}
if (from->flags & SERVER_CTX_SEGMENTS)
{
to->ContextFlags |= WOW64_CONTEXT_SEGMENTS;
to->SegDs = from->seg.i386_regs.ds;
to->SegEs = from->seg.i386_regs.es;
to->SegFs = from->seg.i386_regs.fs;
to->SegGs = from->seg.i386_regs.gs;
}
if (from->flags & SERVER_CTX_FLOATING_POINT)
{
to->ContextFlags |= WOW64_CONTEXT_FLOATING_POINT;
to->FloatSave.ControlWord = from->fp.i386_regs.ctrl;
to->FloatSave.StatusWord = from->fp.i386_regs.status;
to->FloatSave.TagWord = from->fp.i386_regs.tag;
to->FloatSave.ErrorOffset = from->fp.i386_regs.err_off;
to->FloatSave.ErrorSelector = from->fp.i386_regs.err_sel;
to->FloatSave.DataOffset = from->fp.i386_regs.data_off;
to->FloatSave.DataSelector = from->fp.i386_regs.data_sel;
to->FloatSave.Cr0NpxState = from->fp.i386_regs.cr0npx;
memcpy( to->FloatSave.RegisterArea, from->fp.i386_regs.regs, sizeof(to->FloatSave.RegisterArea) );
}
if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
{
to->ContextFlags |= WOW64_CONTEXT_DEBUG_REGISTERS;
to->Dr0 = from->debug.i386_regs.dr0;
to->Dr1 = from->debug.i386_regs.dr1;
to->Dr2 = from->debug.i386_regs.dr2;
to->Dr3 = from->debug.i386_regs.dr3;
to->Dr6 = from->debug.i386_regs.dr6;
to->Dr7 = from->debug.i386_regs.dr7;
}
if (from->flags & SERVER_CTX_EXTENDED_REGISTERS)
{
to->ContextFlags |= WOW64_CONTEXT_EXTENDED_REGISTERS;
memcpy( to->ExtendedRegisters, from->ext.i386_regs, sizeof(to->ExtendedRegisters) );
}
return STATUS_SUCCESS;
}
/***********************************************************************
* wow64_context_to_server
*/
static void wow64_context_to_server( context_t *to, const WOW64_CONTEXT *from )
{
DWORD flags = from->ContextFlags & ~WOW64_CONTEXT_i386; /* get rid of CPU id */
memset( to, 0, sizeof(*to) );
to->cpu = CPU_x86;
if (flags & WOW64_CONTEXT_CONTROL)
{
to->flags |= SERVER_CTX_CONTROL;
to->ctl.i386_regs.ebp = from->Ebp;
to->ctl.i386_regs.esp = from->Esp;
to->ctl.i386_regs.eip = from->Eip;
to->ctl.i386_regs.cs = from->SegCs;
to->ctl.i386_regs.ss = from->SegSs;
to->ctl.i386_regs.eflags = from->EFlags;
}
if (flags & WOW64_CONTEXT_INTEGER)
{
to->flags |= SERVER_CTX_INTEGER;
to->integer.i386_regs.eax = from->Eax;
to->integer.i386_regs.ebx = from->Ebx;
to->integer.i386_regs.ecx = from->Ecx;
to->integer.i386_regs.edx = from->Edx;
to->integer.i386_regs.esi = from->Esi;
to->integer.i386_regs.edi = from->Edi;
}
if (flags & WOW64_CONTEXT_SEGMENTS)
{
to->flags |= SERVER_CTX_SEGMENTS;
to->seg.i386_regs.ds = from->SegDs;
to->seg.i386_regs.es = from->SegEs;
to->seg.i386_regs.fs = from->SegFs;
to->seg.i386_regs.gs = from->SegGs;
}
if (flags & WOW64_CONTEXT_FLOATING_POINT)
{
to->flags |= SERVER_CTX_FLOATING_POINT;
to->fp.i386_regs.ctrl = from->FloatSave.ControlWord;
to->fp.i386_regs.status = from->FloatSave.StatusWord;
to->fp.i386_regs.tag = from->FloatSave.TagWord;
to->fp.i386_regs.err_off = from->FloatSave.ErrorOffset;
to->fp.i386_regs.err_sel = from->FloatSave.ErrorSelector;
to->fp.i386_regs.data_off = from->FloatSave.DataOffset;
to->fp.i386_regs.data_sel = from->FloatSave.DataSelector;
to->fp.i386_regs.cr0npx = from->FloatSave.Cr0NpxState;
memcpy( to->fp.i386_regs.regs, from->FloatSave.RegisterArea, sizeof(to->fp.i386_regs.regs) );
}
if (flags & WOW64_CONTEXT_DEBUG_REGISTERS)
{
to->flags |= SERVER_CTX_DEBUG_REGISTERS;
to->debug.i386_regs.dr0 = from->Dr0;
to->debug.i386_regs.dr1 = from->Dr1;
to->debug.i386_regs.dr2 = from->Dr2;
to->debug.i386_regs.dr3 = from->Dr3;
to->debug.i386_regs.dr6 = from->Dr6;
to->debug.i386_regs.dr7 = from->Dr7;
}
if (flags & WOW64_CONTEXT_EXTENDED_REGISTERS)
{
to->flags |= SERVER_CTX_EXTENDED_REGISTERS;
memcpy( to->ext.i386_regs, from->ExtendedRegisters, sizeof(to->ext.i386_regs) );
}
}
/******************************************************************************
* RtlWow64GetThreadContext (NTDLL.@)
*/
NTSTATUS WINAPI RtlWow64GetThreadContext( HANDLE handle, WOW64_CONTEXT *context )
{
BOOL self;
NTSTATUS ret;
context_t server_context;
unsigned int server_flags = wow64_get_server_context_flags( context->ContextFlags );
if ((ret = get_thread_context( handle, &server_context, server_flags, &self ))) return ret;
if (self) return STATUS_INVALID_PARAMETER;
return wow64_context_from_server( context, &server_context );
}
/******************************************************************************
* RtlWow64SetThreadContext (NTDLL.@)
*/
NTSTATUS WINAPI RtlWow64SetThreadContext( HANDLE handle, const WOW64_CONTEXT *context )
{
BOOL self;
context_t server_context;
wow64_context_to_server( &server_context, context );
return set_thread_context( handle, &server_context, &self );
}
extern void raise_func_trampoline( EXCEPTION_RECORD *rec, CONTEXT *context, raise_func func );
__ASM_GLOBAL_FUNC( raise_func_trampoline,
__ASM_CFI(".cfi_signal_frame\n\t")
__ASM_CFI(".cfi_def_cfa %rbp,160\n\t") /* red zone + rip + rbp + rdi + rsi */
__ASM_CFI(".cfi_rel_offset %rip,24\n\t")
__ASM_CFI(".cfi_rel_offset %rbp,16\n\t")
__ASM_CFI(".cfi_rel_offset %rdi,8\n\t")
__ASM_CFI(".cfi_rel_offset %rsi,0\n\t")
"call *%rdx\n\t"
"int $3")
/***********************************************************************
* setup_exception
*
* Setup a proper stack frame for the raise function, and modify the
* sigcontext so that the return from the signal handler will call
* the raise function.
*/
static EXCEPTION_RECORD *setup_exception( ucontext_t *sigcontext, raise_func func )
{
struct stack_layout
{
CONTEXT context;
EXCEPTION_RECORD rec;
ULONG64 rsi;
ULONG64 rdi;
ULONG64 rbp;
ULONG64 rip;
ULONG64 red_zone[16];
} *stack;
ULONG64 *rsp_ptr;
DWORD exception_code = 0;
stack = (struct stack_layout *)(RSP_sig(sigcontext) & ~15);
/* stack sanity checks */
if (is_inside_signal_stack( stack ))
{
ERR( "nested exception on signal stack in thread %04x eip %016lx esp %016lx stack %p-%p\n",
GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext), (ULONG_PTR)RSP_sig(sigcontext),
NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
abort_thread(1);
}
if (stack - 1 > stack || /* check for overflow in subtraction */
(char *)stack <= (char *)NtCurrentTeb()->DeallocationStack ||
(char *)stack > (char *)NtCurrentTeb()->Tib.StackBase)
{
WARN( "exception outside of stack limits in thread %04x eip %016lx esp %016lx stack %p-%p\n",
GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext), (ULONG_PTR)RSP_sig(sigcontext),
NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
}
else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->DeallocationStack + 4096)
{
/* stack overflow on last page, unrecoverable */
UINT diff = (char *)NtCurrentTeb()->DeallocationStack + 4096 - (char *)(stack - 1);
ERR( "stack overflow %u bytes in thread %04x eip %016lx esp %016lx stack %p-%p-%p\n",
diff, GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext),
(ULONG_PTR)RSP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
abort_thread(1);
}
else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit)
{
/* stack access below stack limit, may be recoverable */
if (virtual_handle_stack_fault( stack - 1 )) exception_code = EXCEPTION_STACK_OVERFLOW;
else
{
UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)(stack - 1);
ERR( "stack overflow %u bytes in thread %04x eip %016lx esp %016lx stack %p-%p-%p\n",
diff, GetCurrentThreadId(), (ULONG_PTR)RIP_sig(sigcontext),
(ULONG_PTR)RSP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
abort_thread(1);
}
}
stack--; /* push the stack_layout structure */
#if defined(VALGRIND_MAKE_MEM_UNDEFINED)
VALGRIND_MAKE_MEM_UNDEFINED(stack, sizeof(*stack));
#elif defined(VALGRIND_MAKE_WRITABLE)
VALGRIND_MAKE_WRITABLE(stack, sizeof(*stack));
#endif
stack->rec.ExceptionRecord = NULL;
stack->rec.ExceptionCode = exception_code;
stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
stack->rec.ExceptionAddress = (void *)RIP_sig(sigcontext);
stack->rec.NumberParameters = 0;
save_context( &stack->context, sigcontext );
/* store return address and %rbp without aligning, so that the offset is fixed */
rsp_ptr = (ULONG64 *)RSP_sig(sigcontext) - 16;
*(--rsp_ptr) = RIP_sig(sigcontext);
*(--rsp_ptr) = RBP_sig(sigcontext);
*(--rsp_ptr) = RDI_sig(sigcontext);
*(--rsp_ptr) = RSI_sig(sigcontext);
/* now modify the sigcontext to return to the raise function */
RIP_sig(sigcontext) = (ULONG_PTR)raise_func_trampoline;
RDI_sig(sigcontext) = (ULONG_PTR)&stack->rec;
RSI_sig(sigcontext) = (ULONG_PTR)&stack->context;
RDX_sig(sigcontext) = (ULONG_PTR)func;
RBP_sig(sigcontext) = (ULONG_PTR)rsp_ptr;
RSP_sig(sigcontext) = (ULONG_PTR)stack;
/* clear single-step, direction, and align check flag */
EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000);
return &stack->rec;
}
/***********************************************************************
* get_exception_context
*
* Get a pointer to the context built by setup_exception.
*/
static inline CONTEXT *get_exception_context( EXCEPTION_RECORD *rec )
{
return (CONTEXT *)rec - 1; /* cf. stack_layout structure */
}
/**********************************************************************
* find_function_info
*/
static RUNTIME_FUNCTION *find_function_info( ULONG64 pc, HMODULE module,
RUNTIME_FUNCTION *func, ULONG size )
{
int min = 0;
int max = size/sizeof(*func) - 1;
while (min <= max)
{
int pos = (min + max) / 2;
if ((char *)pc < (char *)module + func[pos].BeginAddress) max = pos - 1;
else if ((char *)pc >= (char *)module + func[pos].EndAddress) min = pos + 1;
else
{
func += pos;
while (func->UnwindData & 1) /* follow chained entry */
func = (RUNTIME_FUNCTION *)((char *)module + (func->UnwindData & ~1));
return func;
}
}
return NULL;
}
/**********************************************************************
* lookup_function_info
*/
static RUNTIME_FUNCTION *lookup_function_info( ULONG64 pc, ULONG64 *base, LDR_MODULE **module )
{
RUNTIME_FUNCTION *func = NULL;
struct dynamic_unwind_entry *entry;
ULONG size;
/* PE module or wine module */
if (!LdrFindEntryForAddress( (void *)pc, module ))
{
*base = (ULONG64)(*module)->BaseAddress;
if ((func = RtlImageDirectoryEntryToData( (*module)->BaseAddress, TRUE,
IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size )))
{
/* lookup in function table */
func = find_function_info( pc, (*module)->BaseAddress, func, size );
}
}
else
{
*module = NULL;
RtlEnterCriticalSection( &dynamic_unwind_section );
LIST_FOR_EACH_ENTRY( entry, &dynamic_unwind_list, struct dynamic_unwind_entry, entry )
{
if (pc >= entry->base && pc < entry->base + entry->size)
{
*base = entry->base;
/* use callback or lookup in function table */
if (entry->callback)
func = entry->callback( pc, entry->context );
else
func = find_function_info( pc, (HMODULE)entry->base, entry->table, entry->table_size );
break;
}
}
RtlLeaveCriticalSection( &dynamic_unwind_section );
}
return func;
}
static DWORD nested_exception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) return ExceptionContinueSearch;
/* FIXME */
return ExceptionNestedException;
}
/**********************************************************************
* call_handler
*
* Call a single exception handler.
* FIXME: Handle nested exceptions.
*/
static DWORD call_handler( EXCEPTION_RECORD *rec, CONTEXT *context, DISPATCHER_CONTEXT *dispatch )
{
EXCEPTION_REGISTRATION_RECORD frame;
DWORD res;
frame.Handler = nested_exception_handler;
__wine_push_frame( &frame );
TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n",
dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
res = dispatch->LanguageHandler( rec, dispatch->EstablisherFrame, context, dispatch );
TRACE( "handler at %p returned %u\n", dispatch->LanguageHandler, res );
__wine_pop_frame( &frame );
return res;
}
/**********************************************************************
* call_teb_handler
*
* Call a single exception handler from the TEB chain.
* FIXME: Handle nested exceptions.
*/
static DWORD call_teb_handler( EXCEPTION_RECORD *rec, CONTEXT *context, DISPATCHER_CONTEXT *dispatch,
EXCEPTION_REGISTRATION_RECORD *teb_frame )
{
DWORD res;
TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n",
teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, dispatch );
res = teb_frame->Handler( rec, teb_frame, context, (EXCEPTION_REGISTRATION_RECORD**)dispatch );
TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
return res;
}
/**********************************************************************
* call_stack_handlers
*
* Call the stack handlers chain.
*/
static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *orig_context )
{
EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
UNWIND_HISTORY_TABLE table;
DISPATCHER_CONTEXT dispatch;
CONTEXT context;
LDR_MODULE *module;
NTSTATUS status;
context = *orig_context;
dispatch.TargetIp = 0;
dispatch.ContextRecord = &context;
dispatch.HistoryTable = &table;
for (;;)
{
/* FIXME: should use the history table to make things faster */
dispatch.ImageBase = 0;
dispatch.ControlPc = context.Rip;
dispatch.ScopeIndex = 0;
/* first look for PE exception information */
if ((dispatch.FunctionEntry = lookup_function_info( dispatch.ControlPc, &dispatch.ImageBase, &module )))
{
dispatch.LanguageHandler = RtlVirtualUnwind( UNW_FLAG_EHANDLER, dispatch.ImageBase,
dispatch.ControlPc, dispatch.FunctionEntry,
&context, &dispatch.HandlerData,
&dispatch.EstablisherFrame, NULL );
goto unwind_done;
}
/* then look for host system exception information */
if (!module || (module->Flags & LDR_WINE_INTERNAL))
{
BOOL got_info = FALSE;
struct dwarf_eh_bases bases;
const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(dispatch.ControlPc - 1), &bases );
if (fde)
{
status = dwarf_virtual_unwind( dispatch.ControlPc, &dispatch.EstablisherFrame, &context,
fde, &bases, &dispatch.LanguageHandler, &dispatch.HandlerData );
if (status != STATUS_SUCCESS) return status;
got_info = TRUE;
}
#ifdef HAVE_LIBUNWIND_H
else
{
status = libunwind_virtual_unwind( dispatch.ControlPc, &got_info, &dispatch.EstablisherFrame, &context,
&dispatch.LanguageHandler, &dispatch.HandlerData );
if (status != STATUS_SUCCESS) return status;
}
#endif
if (got_info)
{
dispatch.FunctionEntry = NULL;
if (dispatch.LanguageHandler && !module)
{
FIXME( "calling personality routine in system library not supported yet\n" );
dispatch.LanguageHandler = NULL;
}
goto unwind_done;
}
}
else WARN( "exception data not found in %s\n", debugstr_w(module->BaseDllName.Buffer) );
context.Rip = *(ULONG64 *)context.Rsp;
context.Rsp = context.Rsp + sizeof(ULONG64);
dispatch.EstablisherFrame = context.Rsp;
dispatch.LanguageHandler = NULL;
unwind_done:
if (!dispatch.EstablisherFrame) break;
if ((dispatch.EstablisherFrame & 7) ||
dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
{
ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
rec->ExceptionFlags |= EH_STACK_INVALID;
break;
}
if (dispatch.LanguageHandler)
{
switch (call_handler( rec, orig_context, &dispatch ))
{
case ExceptionContinueExecution:
if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
return STATUS_SUCCESS;
case ExceptionContinueSearch:
break;
case ExceptionNestedException:
FIXME( "nested exception\n" );
break;
case ExceptionCollidedUnwind: {
ULONG64 frame;
context = *dispatch.ContextRecord;
dispatch.ContextRecord = &context;
RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
dispatch.ControlPc, dispatch.FunctionEntry,
&context, NULL, &frame, NULL );
goto unwind_done;
}
default:
return STATUS_INVALID_DISPOSITION;
}
}
/* hack: call wine handlers registered in the tib list */
else while ((ULONG64)teb_frame < context.Rsp)
{
TRACE( "found wine frame %p rsp %lx handler %p\n",
teb_frame, context.Rsp, teb_frame->Handler );
dispatch.EstablisherFrame = (ULONG64)teb_frame;
switch (call_teb_handler( rec, orig_context, &dispatch, teb_frame ))
{
case ExceptionContinueExecution:
if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
return STATUS_SUCCESS;
case ExceptionContinueSearch:
break;
case ExceptionNestedException:
FIXME( "nested exception\n" );
break;
case ExceptionCollidedUnwind: {
ULONG64 frame;
context = *dispatch.ContextRecord;
dispatch.ContextRecord = &context;
RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
dispatch.ControlPc, dispatch.FunctionEntry,
&context, NULL, &frame, NULL );
teb_frame = teb_frame->Prev;
goto unwind_done;
}
default:
return STATUS_INVALID_DISPOSITION;
}
teb_frame = teb_frame->Prev;
}
if (context.Rsp == (ULONG64)NtCurrentTeb()->Tib.StackBase) break;
}
return STATUS_UNHANDLED_EXCEPTION;
}
/*******************************************************************
* NtRaiseException (NTDLL.@)
*/
NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
{
NTSTATUS status;
if (first_chance)
{
DWORD c;
TRACE( "code=%x flags=%x addr=%p ip=%lx tid=%04x\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
context->Rip, GetCurrentThreadId() );
for (c = 0; c < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); c++)
TRACE( " info[%d]=%016lx\n", c, rec->ExceptionInformation[c] );
if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
{
if (rec->ExceptionInformation[1] >> 16)
MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
rec->ExceptionAddress,
(char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
else
MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
rec->ExceptionAddress,
(char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
}
else
{
TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
context->Rax, context->Rbx, context->Rcx, context->Rdx );
TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
context->Rsi, context->Rdi, context->Rbp, context->Rsp );
TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
context->R8, context->R9, context->R10, context->R11 );
TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
context->R12, context->R13, context->R14, context->R15 );
}
status = send_debug_event( rec, TRUE, context );
if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED) goto done;
/* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context->Rip--;
if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION) goto done;
if ((status = call_stack_handlers( rec, context )) == STATUS_SUCCESS) goto done;
if (status != STATUS_UNHANDLED_EXCEPTION) return status;
}
/* last chance exception */
status = send_debug_event( rec, FALSE, context );
if (status != DBG_CONTINUE)
{
if (rec->ExceptionFlags & EH_STACK_INVALID)
ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
ERR("Process attempted to continue execution after noncontinuable exception.\n");
else
ERR("Unhandled exception code %x flags %x addr %p\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode );
}
done:
return NtSetContextThread( GetCurrentThread(), context );
}
/**********************************************************************
* raise_segv_exception
*/
static void raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
{
NTSTATUS status;
switch(rec->ExceptionCode)
{
case EXCEPTION_ACCESS_VIOLATION:
if (rec->NumberParameters == 2)
{
if (!(rec->ExceptionCode = virtual_handle_fault( (void *)rec->ExceptionInformation[1],
rec->ExceptionInformation[0], FALSE )))
set_cpu_context( context );
}
break;
case EXCEPTION_BREAKPOINT:
switch (rec->ExceptionInformation[0])
{
case 1: /* BREAKPOINT_PRINT */
case 3: /* BREAKPOINT_LOAD_SYMBOLS */
case 4: /* BREAKPOINT_UNLOAD_SYMBOLS */
case 5: /* BREAKPOINT_COMMAND_STRING (>= Win2003) */
set_cpu_context( context );
}
break;
}
status = NtRaiseException( rec, context, TRUE );
raise_status( status, rec );
}
/**********************************************************************
* raise_trap_exception
*/
static void raise_trap_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
{
NTSTATUS status;
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) || (amd64_thread_data()->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 = NtRaiseException( rec, context, TRUE );
raise_status( status, rec );
}
/**********************************************************************
* raise_generic_exception
*
* Generic raise function for exceptions that don't need special treatment.
*/
static void raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
{
NTSTATUS status = NtRaiseException( rec, context, TRUE );
raise_status( status, rec );
}
/***********************************************************************
* is_privileged_instr
*
* Check if the fault location is a privileged instruction.
*/
static inline DWORD is_privileged_instr( CONTEXT *context )
{
const BYTE *instr = (BYTE *)context->Rip;
unsigned int prefix_count = 0;
for (;;) switch(*instr)
{
/* 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;
instr++;
continue;
case 0x0f: /* extended instruction */
switch(instr[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;
}
}
/***********************************************************************
* handle_interrupt
*
* Handle an interrupt.
*/
static inline BOOL handle_interrupt( unsigned int interrupt, EXCEPTION_RECORD *rec, CONTEXT *context )
{
switch(interrupt)
{
case 0x2c:
rec->ExceptionCode = STATUS_ASSERTION_FAILURE;
return TRUE;
case 0x2d:
context->Rip += 3;
rec->ExceptionCode = EXCEPTION_BREAKPOINT;
rec->ExceptionAddress = (void *)context->Rip;
rec->NumberParameters = 1;
rec->ExceptionInformation[0] = context->Rax;
return TRUE;
default:
return FALSE;
}
}
/**********************************************************************
* segv_handler
*
* Handler for SIGSEGV and related errors.
*/
static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD *rec;
ucontext_t *ucontext = sigcontext;
/* check for page fault inside the thread stack */
if (TRAP_sig(ucontext) == TRAP_x86_PAGEFLT &&
(char *)siginfo->si_addr >= (char *)NtCurrentTeb()->DeallocationStack &&
(char *)siginfo->si_addr < (char *)NtCurrentTeb()->Tib.StackBase &&
virtual_handle_stack_fault( siginfo->si_addr ))
{
/* check if this was the last guard page */
if ((char *)siginfo->si_addr < (char *)NtCurrentTeb()->DeallocationStack + 2*4096)
{
rec = setup_exception( sigcontext, raise_segv_exception );
rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
}
return;
}
rec = setup_exception( sigcontext, raise_segv_exception );
if (rec->ExceptionCode == EXCEPTION_STACK_OVERFLOW) return;
switch(TRAP_sig(ucontext))
{
case TRAP_x86_OFLOW: /* Overflow exception */
rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
break;
case TRAP_x86_BOUND: /* Bound range exception */
rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
break;
case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
case TRAP_x86_STKFLT: /* Stack fault */
rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
break;
case TRAP_x86_SEGNPFLT: /* Segment not present exception */
case TRAP_x86_PROTFLT: /* General protection fault */
case TRAP_x86_UNKNOWN: /* Unknown fault code */
{
CONTEXT *win_context = get_exception_context( rec );
WORD err = ERROR_sig(ucontext);
if (!err && (rec->ExceptionCode = is_privileged_instr( win_context ))) break;
if ((err & 7) == 2 && handle_interrupt( err >> 3, rec, win_context )) break;
rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
rec->NumberParameters = 2;
rec->ExceptionInformation[0] = 0;
rec->ExceptionInformation[1] = 0xffffffffffffffff;
}
break;
case TRAP_x86_PAGEFLT: /* Page fault */
rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
rec->NumberParameters = 2;
rec->ExceptionInformation[0] = (ERROR_sig(ucontext) >> 1) & 0x09;
rec->ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
break;
case TRAP_x86_ALIGNFLT: /* Alignment check exception */
rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
break;
default:
ERR( "Got unexpected trap %ld\n", (ULONG_PTR)TRAP_sig(ucontext) );
/* fall through */
case TRAP_x86_NMI: /* NMI interrupt */
case TRAP_x86_DNA: /* Device not available exception */
case TRAP_x86_DOUBLEFLT: /* Double fault exception */
case TRAP_x86_TSSFLT: /* Invalid TSS exception */
case TRAP_x86_MCHK: /* Machine check exception */
case TRAP_x86_CACHEFLT: /* Cache flush exception */
rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
}
}
/**********************************************************************
* trap_handler
*
* Handler for SIGTRAP.
*/
static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_trap_exception );
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 */
/* Check if this is actuallly icebp instruction */
if (((unsigned char *)rec->ExceptionAddress)[-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;
}
}
/**********************************************************************
* fpe_handler
*
* Handler for SIGFPE.
*/
static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
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;
}
}
/**********************************************************************
* int_handler
*
* Handler for SIGINT.
*/
static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
if (!dispatch_signal(SIGINT))
{
EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
rec->ExceptionCode = CONTROL_C_EXIT;
}
}
/**********************************************************************
* abrt_handler
*
* Handler for SIGABRT.
*/
static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
rec->ExceptionCode = EXCEPTION_WINE_ASSERTION;
rec->ExceptionFlags = EH_NONCONTINUABLE;
}
/**********************************************************************
* quit_handler
*
* Handler for SIGQUIT.
*/
static void quit_handler( int signal, siginfo_t *siginfo, void *ucontext )
{
abort_thread(0);
}
/**********************************************************************
* usr1_handler
*
* Handler for SIGUSR1, used to signal a thread that it got suspended.
*/
static void usr1_handler( int signal, siginfo_t *siginfo, void *ucontext )
{
CONTEXT context;
save_context( &context, ucontext );
wait_suspend( &context );
restore_context( &context, ucontext );
}
/***********************************************************************
* __wine_set_signal_handler (NTDLL.@)
*/
int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
{
if (sig >= ARRAY_SIZE(handlers)) return -1;
if (handlers[sig] != NULL) return -2;
handlers[sig] = wsh;
return 0;
}
/**********************************************************************
* signal_alloc_thread
*/
NTSTATUS signal_alloc_thread( TEB **teb )
{
static size_t sigstack_zero_bits;
SIZE_T size;
NTSTATUS status;
if (!sigstack_zero_bits)
{
size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 );
/* find the first power of two not smaller than min_size */
sigstack_zero_bits = 12;
while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
signal_stack_size = (1 << sigstack_zero_bits) - teb_size;
assert( sizeof(TEB) <= teb_size );
}
size = 1 << sigstack_zero_bits;
*teb = NULL;
if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), (void **)teb, sigstack_zero_bits,
&size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
{
(*teb)->Tib.Self = &(*teb)->Tib;
(*teb)->Tib.ExceptionList = (void *)~0UL;
}
return status;
}
/**********************************************************************
* signal_free_thread
*/
void signal_free_thread( TEB *teb )
{
SIZE_T size = 0;
NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
}
#ifdef __APPLE__
/**********************************************************************
* mac_thread_gsbase
*/
static void *mac_thread_gsbase(void)
{
static int gsbase_offset = -1;
void *ret;
if (gsbase_offset < 0)
{
/* Search for the array of TLS slots within the pthread data structure.
That's what the macOS pthread implementation uses for gsbase. */
const void* const sentinel1 = (const void*)0x2bffb6b4f11228ae;
const void* const sentinel2 = (const void*)0x0845a7ff6ab76707;
int rc;
pthread_key_t key;
const void** p = (const void**)pthread_self();
int i;
gsbase_offset = 0;
if ((rc = pthread_key_create(&key, NULL)))
{
ERR("failed to create sentinel key for gsbase search: %d\n", rc);
return NULL;
}
pthread_setspecific(key, sentinel1);
for (i = key + 1; i < 2000; i++) /* arbitrary limit */
{
if (p[i] == sentinel1)
{
pthread_setspecific(key, sentinel2);
if (p[i] == sentinel2)
{
gsbase_offset = (i - key) * sizeof(*p);
break;
}
pthread_setspecific(key, sentinel1);
}
}
pthread_key_delete(key);
}
if (gsbase_offset)
{
ret = (char*)pthread_self() + gsbase_offset;
TRACE("pthread_self() %p + offset 0x%08x -> gsbase %p\n", pthread_self(), gsbase_offset, ret);
}
else
{
ret = NULL;
ERR("failed to locate gsbase; won't be able to poke ThreadLocalStoragePointer into pthread TLS; expect crashes\n");
}
return ret;
}
#endif
/**********************************************************************
* signal_init_thread
*/
void signal_init_thread( TEB *teb )
{
const WORD fpu_cw = 0x27f;
stack_t ss;
#if defined __linux__
arch_prctl( ARCH_SET_GS, teb );
#elif defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
amd64_set_gsbase( teb );
#elif defined(__NetBSD__)
sysarch( X86_64_SET_GSBASE, &teb );
#elif defined (__APPLE__)
__asm__ volatile (".byte 0x65\n\tmovq %0,%c1"
:
: "r" (teb->Tib.Self), "n" (FIELD_OFFSET(TEB, Tib.Self)));
__asm__ volatile (".byte 0x65\n\tmovq %0,%c1"
:
: "r" (teb->ThreadLocalStoragePointer), "n" (FIELD_OFFSET(TEB, ThreadLocalStoragePointer)));
/* alloc_tls_slot() needs to poke a value to an address relative to each
thread's gsbase. Have each thread record its gsbase pointer into its
TEB so alloc_tls_slot() can find it. */
teb->Reserved5[0] = mac_thread_gsbase();
#else
# error Please define setting %gs for your architecture
#endif
ss.ss_sp = (char *)teb + teb_size;
ss.ss_size = signal_stack_size;
ss.ss_flags = 0;
if (sigaltstack(&ss, NULL) == -1) perror( "sigaltstack" );
#ifdef __GNUC__
__asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw));
#else
FIXME("FPU setup not implemented for this platform.\n");
#endif
}
/**********************************************************************
* signal_init_process
*/
void signal_init_process(void)
{
struct sigaction sig_act;
sig_act.sa_mask = server_block_set;
sig_act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
sig_act.sa_sigaction = int_handler;
if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = fpe_handler;
if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = abrt_handler;
if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = quit_handler;
if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = usr1_handler;
if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = segv_handler;
if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
#ifdef SIGBUS
if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
#endif
#ifdef SIGTRAP
sig_act.sa_sigaction = trap_handler;
if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
#endif
return;
error:
perror("sigaction");
exit(1);
}
/**********************************************************************
* RtlAddFunctionTable (NTDLL.@)
*/
BOOLEAN CDECL RtlAddFunctionTable( RUNTIME_FUNCTION *table, DWORD count, DWORD64 addr )
{
struct dynamic_unwind_entry *entry;
TRACE( "%p %u %lx\n", table, count, addr );
/* NOTE: Windows doesn't check if table is aligned or a NULL pointer */
entry = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*entry) );
if (!entry)
return FALSE;
entry->base = addr;
entry->size = table[count - 1].EndAddress;
entry->table = table;
entry->table_size = count * sizeof(RUNTIME_FUNCTION);
entry->callback = NULL;
entry->context = NULL;
RtlEnterCriticalSection( &dynamic_unwind_section );
list_add_tail( &dynamic_unwind_list, &entry->entry );
RtlLeaveCriticalSection( &dynamic_unwind_section );
return TRUE;
}
/**********************************************************************
* RtlInstallFunctionTableCallback (NTDLL.@)
*/
BOOLEAN CDECL RtlInstallFunctionTableCallback( DWORD64 table, DWORD64 base, DWORD length,
PGET_RUNTIME_FUNCTION_CALLBACK callback, PVOID context, PCWSTR dll )
{
struct dynamic_unwind_entry *entry;
TRACE( "%lx %lx %d %p %p %s\n", table, base, length, callback, context, wine_dbgstr_w(dll) );
/* NOTE: Windows doesn't check if the provided callback is a NULL pointer */
/* both low-order bits must be set */
if ((table & 0x3) != 0x3)
return FALSE;
entry = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*entry) );
if (!entry)
return FALSE;
entry->base = base;
entry->size = length;
entry->table = (RUNTIME_FUNCTION *)table;
entry->table_size = 0;
entry->callback = callback;
entry->context = context;
RtlEnterCriticalSection( &dynamic_unwind_section );
list_add_tail( &dynamic_unwind_list, &entry->entry );
RtlLeaveCriticalSection( &dynamic_unwind_section );
return TRUE;
}
/**********************************************************************
* RtlDeleteFunctionTable (NTDLL.@)
*/
BOOLEAN CDECL RtlDeleteFunctionTable( RUNTIME_FUNCTION *table )
{
struct dynamic_unwind_entry *entry, *to_free = NULL;
TRACE( "%p\n", table );
RtlEnterCriticalSection( &dynamic_unwind_section );
LIST_FOR_EACH_ENTRY( entry, &dynamic_unwind_list, struct dynamic_unwind_entry, entry )
{
if (entry->table == table)
{
to_free = entry;
list_remove( &entry->entry );
break;
}
}
RtlLeaveCriticalSection( &dynamic_unwind_section );
if (!to_free)
return FALSE;
RtlFreeHeap( GetProcessHeap(), 0, to_free );
return TRUE;
}
/**********************************************************************
* RtlLookupFunctionEntry (NTDLL.@)
*/
PRUNTIME_FUNCTION WINAPI RtlLookupFunctionEntry( ULONG64 pc, ULONG64 *base, UNWIND_HISTORY_TABLE *table )
{
LDR_MODULE *module;
RUNTIME_FUNCTION *func;
/* FIXME: should use the history table to make things faster */
func = lookup_function_info( pc, base, &module );
if (!func)
{
*base = 0;
if (module)
WARN( "no exception table found in module %p pc %lx\n", module->BaseAddress, pc );
else
WARN( "module not found for %lx\n", pc );
}
return func;
}
static ULONG64 get_int_reg( CONTEXT *context, int reg )
{
return *(&context->Rax + reg);
}
static void set_int_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, ULONG64 *val )
{
*(&context->Rax + reg) = *val;
if (ctx_ptr) ctx_ptr->u2.IntegerContext[reg] = val;
}
static void set_float_reg( CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr, int reg, M128A *val )
{
*(&context->u.s.Xmm0 + reg) = *val;
if (ctx_ptr) ctx_ptr->u.FloatingContext[reg] = val;
}
static int get_opcode_size( struct opcode op )
{
switch (op.code)
{
case UWOP_ALLOC_LARGE:
return 2 + (op.info != 0);
case UWOP_SAVE_NONVOL:
case UWOP_SAVE_XMM128:
return 2;
case UWOP_SAVE_NONVOL_FAR:
case UWOP_SAVE_XMM128_FAR:
return 3;
default:
return 1;
}
}
static BOOL is_inside_epilog( BYTE *pc, ULONG64 base, const RUNTIME_FUNCTION *function )
{
/* add or lea must be the first instruction, and it must have a rex.W prefix */
if ((pc[0] & 0xf8) == 0x48)
{
switch (pc[1])
{
case 0x81: /* add $nnnn,%rsp */
if (pc[0] == 0x48 && pc[2] == 0xc4)
{
pc += 7;
break;
}
return FALSE;
case 0x83: /* add $n,%rsp */
if (pc[0] == 0x48 && pc[2] == 0xc4)
{
pc += 4;
break;
}
return FALSE;
case 0x8d: /* lea n(reg),%rsp */
if (pc[0] & 0x06) return FALSE; /* rex.RX must be cleared */
if (((pc[2] >> 3) & 7) != 4) return FALSE; /* dest reg mus be %rsp */
if ((pc[2] & 7) == 4) return FALSE; /* no SIB byte allowed */
if ((pc[2] >> 6) == 1) /* 8-bit offset */
{
pc += 4;
break;
}
if ((pc[2] >> 6) == 2) /* 32-bit offset */
{
pc += 7;
break;
}
return FALSE;
}
}
/* now check for various pop instructions */
for (;;)
{
if ((*pc & 0xf0) == 0x40) pc++; /* rex prefix */
switch (*pc)
{
case 0x58: /* pop %rax/%r8 */
case 0x59: /* pop %rcx/%r9 */
case 0x5a: /* pop %rdx/%r10 */
case 0x5b: /* pop %rbx/%r11 */
case 0x5c: /* pop %rsp/%r12 */
case 0x5d: /* pop %rbp/%r13 */
case 0x5e: /* pop %rsi/%r14 */
case 0x5f: /* pop %rdi/%r15 */
pc++;
continue;
case 0xc2: /* ret $nn */
case 0xc3: /* ret */
return TRUE;
case 0xe9: /* jmp nnnn */
pc += 5 + *(LONG *)(pc + 1);
if (pc - (BYTE *)base >= function->BeginAddress && pc - (BYTE *)base < function->EndAddress)
continue;
break;
case 0xeb: /* jmp n */
pc += 2 + (signed char)pc[1];
if (pc - (BYTE *)base >= function->BeginAddress && pc - (BYTE *)base < function->EndAddress)
continue;
break;
case 0xf3: /* rep; ret (for amd64 prediction bug) */
return pc[1] == 0xc3;
}
return FALSE;
}
}
/* execute a function epilog, which must have been validated with is_inside_epilog() */
static void interpret_epilog( BYTE *pc, CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
{
for (;;)
{
BYTE rex = 0;
if ((*pc & 0xf0) == 0x40) rex = *pc++ & 0x0f; /* rex prefix */
switch (*pc)
{
case 0x58: /* pop %rax/r8 */
case 0x59: /* pop %rcx/r9 */
case 0x5a: /* pop %rdx/r10 */
case 0x5b: /* pop %rbx/r11 */
case 0x5c: /* pop %rsp/r12 */
case 0x5d: /* pop %rbp/r13 */
case 0x5e: /* pop %rsi/r14 */
case 0x5f: /* pop %rdi/r15 */
set_int_reg( context, ctx_ptr, *pc - 0x58 + (rex & 1) * 8, (ULONG64 *)context->Rsp );
context->Rsp += sizeof(ULONG64);
pc++;
continue;
case 0x81: /* add $nnnn,%rsp */
context->Rsp += *(LONG *)(pc + 2);
pc += 2 + sizeof(LONG);
continue;
case 0x83: /* add $n,%rsp */
context->Rsp += (signed char)pc[2];
pc += 3;
continue;
case 0x8d:
if ((pc[1] >> 6) == 1) /* lea n(reg),%rsp */
{
context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + (signed char)pc[2];
pc += 3;
}
else /* lea nnnn(reg),%rsp */
{
context->Rsp = get_int_reg( context, (pc[1] & 7) + (rex & 1) * 8 ) + *(LONG *)(pc + 2);
pc += 2 + sizeof(LONG);
}
continue;
case 0xc2: /* ret $nn */
context->Rip = *(ULONG64 *)context->Rsp;
context->Rsp += sizeof(ULONG64) + *(WORD *)(pc + 1);
return;
case 0xc3: /* ret */
case 0xf3: /* rep; ret */
context->Rip = *(ULONG64 *)context->Rsp;
context->Rsp += sizeof(ULONG64);
return;
case 0xe9: /* jmp nnnn */
pc += 5 + *(LONG *)(pc + 1);
continue;
case 0xeb: /* jmp n */
pc += 2 + (signed char)pc[1];
continue;
}
return;
}
}
/**********************************************************************
* RtlVirtualUnwind (NTDLL.@)
*/
PVOID WINAPI RtlVirtualUnwind( ULONG type, ULONG64 base, ULONG64 pc,
RUNTIME_FUNCTION *function, CONTEXT *context,
PVOID *data, ULONG64 *frame_ret,
KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
{
union handler_data *handler_data;
ULONG64 frame, off;
struct UNWIND_INFO *info;
unsigned int i, prolog_offset;
TRACE( "type %x rip %lx rsp %lx\n", type, pc, context->Rsp );
if (TRACE_ON(seh)) dump_unwind_info( base, function );
frame = *frame_ret = context->Rsp;
for (;;)
{
info = (struct UNWIND_INFO *)((char *)base + function->UnwindData);
handler_data = (union handler_data *)&info->opcodes[(info->count + 1) & ~1];
if (info->version != 1)
{
FIXME( "unknown unwind info version %u at %p\n", info->version, info );
return NULL;
}
if (info->frame_reg)
frame = get_int_reg( context, info->frame_reg ) - info->frame_offset * 16;
/* check if in prolog */
if (pc >= base + function->BeginAddress && pc < base + function->BeginAddress + info->prolog)
{
prolog_offset = pc - base - function->BeginAddress;
}
else
{
prolog_offset = ~0;
if (is_inside_epilog( (BYTE *)pc, base, function ))
{
interpret_epilog( (BYTE *)pc, context, ctx_ptr );
*frame_ret = frame;
return NULL;
}
}
for (i = 0; i < info->count; i += get_opcode_size(info->opcodes[i]))
{
if (prolog_offset < info->opcodes[i].offset) continue; /* skip it */
switch (info->opcodes[i].code)
{
case UWOP_PUSH_NONVOL: /* pushq %reg */
set_int_reg( context, ctx_ptr, info->opcodes[i].info, (ULONG64 *)context->Rsp );
context->Rsp += sizeof(ULONG64);
break;
case UWOP_ALLOC_LARGE: /* subq $nn,%rsp */
if (info->opcodes[i].info) context->Rsp += *(DWORD *)&info->opcodes[i+1];
else context->Rsp += *(USHORT *)&info->opcodes[i+1] * 8;
break;
case UWOP_ALLOC_SMALL: /* subq $n,%rsp */
context->Rsp += (info->opcodes[i].info + 1) * 8;
break;
case UWOP_SET_FPREG: /* leaq nn(%rsp),%framereg */
context->Rsp = *frame_ret = frame;
break;
case UWOP_SAVE_NONVOL: /* movq %reg,n(%rsp) */
off = frame + *(USHORT *)&info->opcodes[i+1] * 8;
set_int_reg( context, ctx_ptr, info->opcodes[i].info, (ULONG64 *)off );
break;
case UWOP_SAVE_NONVOL_FAR: /* movq %reg,nn(%rsp) */
off = frame + *(DWORD *)&info->opcodes[i+1];
set_int_reg( context, ctx_ptr, info->opcodes[i].info, (ULONG64 *)off );
break;
case UWOP_SAVE_XMM128: /* movaps %xmmreg,n(%rsp) */
off = frame + *(USHORT *)&info->opcodes[i+1] * 16;
set_float_reg( context, ctx_ptr, info->opcodes[i].info, (M128A *)off );
break;
case UWOP_SAVE_XMM128_FAR: /* movaps %xmmreg,nn(%rsp) */
off = frame + *(DWORD *)&info->opcodes[i+1];
set_float_reg( context, ctx_ptr, info->opcodes[i].info, (M128A *)off );
break;
case UWOP_PUSH_MACHFRAME:
FIXME( "PUSH_MACHFRAME %u\n", info->opcodes[i].info );
break;
default:
FIXME( "unknown code %u\n", info->opcodes[i].code );
break;
}
}
if (!(info->flags & UNW_FLAG_CHAININFO)) break;
function = &handler_data->chain; /* restart with the chained info */
}
/* now pop return address */
context->Rip = *(ULONG64 *)context->Rsp;
context->Rsp += sizeof(ULONG64);
if (!(info->flags & type)) return NULL; /* no matching handler */
if (prolog_offset != ~0) return NULL; /* inside prolog */
*data = &handler_data->handler + 1;
return (char *)base + handler_data->handler;
}
struct unwind_exception_frame
{
EXCEPTION_REGISTRATION_RECORD frame;
DISPATCHER_CONTEXT *dispatch;
};
/**********************************************************************
* unwind_exception_handler
*
* Handler for exceptions happening while calling an unwind handler.
*/
static DWORD unwind_exception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
struct unwind_exception_frame *unwind_frame = (struct unwind_exception_frame *)frame;
DISPATCHER_CONTEXT *dispatch = (DISPATCHER_CONTEXT *)dispatcher;
/* copy the original dispatcher into the current one, except for the TargetIp */
dispatch->ControlPc = unwind_frame->dispatch->ControlPc;
dispatch->ImageBase = unwind_frame->dispatch->ImageBase;
dispatch->FunctionEntry = unwind_frame->dispatch->FunctionEntry;
dispatch->EstablisherFrame = unwind_frame->dispatch->EstablisherFrame;
dispatch->ContextRecord = unwind_frame->dispatch->ContextRecord;
dispatch->LanguageHandler = unwind_frame->dispatch->LanguageHandler;
dispatch->HandlerData = unwind_frame->dispatch->HandlerData;
dispatch->HistoryTable = unwind_frame->dispatch->HistoryTable;
dispatch->ScopeIndex = unwind_frame->dispatch->ScopeIndex;
TRACE( "detected collided unwind\n" );
return ExceptionCollidedUnwind;
}
/**********************************************************************
* call_unwind_handler
*
* Call a single unwind handler.
*/
static DWORD call_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch )
{
struct unwind_exception_frame frame;
DWORD res;
frame.frame.Handler = unwind_exception_handler;
frame.dispatch = dispatch;
__wine_push_frame( &frame.frame );
TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n",
dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
res = dispatch->LanguageHandler( rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
TRACE( "handler %p returned %x\n", dispatch->LanguageHandler, res );
__wine_pop_frame( &frame.frame );
switch (res)
{
case ExceptionContinueSearch:
case ExceptionCollidedUnwind:
break;
default:
raise_status( STATUS_INVALID_DISPOSITION, rec );
break;
}
return res;
}
/**********************************************************************
* call_teb_unwind_handler
*
* Call a single unwind handler from the TEB chain.
*/
static DWORD call_teb_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch,
EXCEPTION_REGISTRATION_RECORD *teb_frame )
{
DWORD res;
TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n",
teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, dispatch );
res = teb_frame->Handler( rec, teb_frame, dispatch->ContextRecord, (EXCEPTION_REGISTRATION_RECORD**)dispatch );
TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
switch (res)
{
case ExceptionContinueSearch:
case ExceptionCollidedUnwind:
break;
default:
raise_status( STATUS_INVALID_DISPOSITION, rec );
break;
}
return res;
}
/**********************************************************************
* call_consolidate_callback
*
* Wrapper function to call a consolidate callback from a fake frame.
* If the callback executes RtlUnwindEx (like for example done in C++ handlers),
* we have to skip all frames which were already processed. To do that we
* trick the unwinding functions into thinking the call came from somewhere
* else. All CFI instructions are either DW_CFA_def_cfa_expression or
* DW_CFA_expression, and the expressions have the following format:
*
* DW_OP_breg6; sleb128 0x10 | Load %rbp + 0x10
* DW_OP_deref | Get *(%rbp + 0x10) == context
* DW_OP_plus_uconst; uleb128 <OFFSET> | Add offset to get struct member
* [DW_OP_deref] | Dereference, only for CFA
*/
extern void * WINAPI call_consolidate_callback( CONTEXT *context,
void *(CALLBACK *callback)(EXCEPTION_RECORD *),
EXCEPTION_RECORD *rec );
__ASM_GLOBAL_FUNC( call_consolidate_callback,
"pushq %rbp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
__ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
"movq %rsp,%rbp\n\t"
__ASM_CFI(".cfi_def_cfa_register %rbp\n\t")
"subq $0x20,%rsp\n\t"
"movq %rcx,0x10(%rbp)\n\t"
__ASM_CFI(".cfi_remember_state\n\t")
__ASM_CFI(".cfi_escape 0x0f,0x07,0x76,0x10,0x06,0x23,0x98,0x01,0x06\n\t") /* CFA */
__ASM_CFI(".cfi_escape 0x10,0x03,0x06,0x76,0x10,0x06,0x23,0x90,0x01\n\t") /* %rbx */
__ASM_CFI(".cfi_escape 0x10,0x04,0x06,0x76,0x10,0x06,0x23,0xa8,0x01\n\t") /* %rsi */
__ASM_CFI(".cfi_escape 0x10,0x05,0x06,0x76,0x10,0x06,0x23,0xb0,0x01\n\t") /* %rdi */
__ASM_CFI(".cfi_escape 0x10,0x06,0x06,0x76,0x10,0x06,0x23,0xa0,0x01\n\t") /* %rbp */
__ASM_CFI(".cfi_escape 0x10,0x0c,0x06,0x76,0x10,0x06,0x23,0xd8,0x01\n\t") /* %r12 */
__ASM_CFI(".cfi_escape 0x10,0x0d,0x06,0x76,0x10,0x06,0x23,0xe0,0x01\n\t") /* %r13 */
__ASM_CFI(".cfi_escape 0x10,0x0e,0x06,0x76,0x10,0x06,0x23,0xe8,0x01\n\t") /* %r14 */
__ASM_CFI(".cfi_escape 0x10,0x0f,0x06,0x76,0x10,0x06,0x23,0xf0,0x01\n\t") /* %r15 */
__ASM_CFI(".cfi_escape 0x10,0x10,0x06,0x76,0x10,0x06,0x23,0xf8,0x01\n\t") /* %rip */
__ASM_CFI(".cfi_escape 0x10,0x17,0x06,0x76,0x10,0x06,0x23,0x80,0x04\n\t") /* %xmm6 */
__ASM_CFI(".cfi_escape 0x10,0x18,0x06,0x76,0x10,0x06,0x23,0x90,0x04\n\t") /* %xmm7 */
__ASM_CFI(".cfi_escape 0x10,0x19,0x06,0x76,0x10,0x06,0x23,0xa0,0x04\n\t") /* %xmm8 */
__ASM_CFI(".cfi_escape 0x10,0x1a,0x06,0x76,0x10,0x06,0x23,0xb0,0x04\n\t") /* %xmm9 */
__ASM_CFI(".cfi_escape 0x10,0x1b,0x06,0x76,0x10,0x06,0x23,0xc0,0x04\n\t") /* %xmm10 */
__ASM_CFI(".cfi_escape 0x10,0x1c,0x06,0x76,0x10,0x06,0x23,0xd0,0x04\n\t") /* %xmm11 */
__ASM_CFI(".cfi_escape 0x10,0x1d,0x06,0x76,0x10,0x06,0x23,0xe0,0x04\n\t") /* %xmm12 */
__ASM_CFI(".cfi_escape 0x10,0x1e,0x06,0x76,0x10,0x06,0x23,0xf0,0x04\n\t") /* %xmm13 */
__ASM_CFI(".cfi_escape 0x10,0x1f,0x06,0x76,0x10,0x06,0x23,0x80,0x05\n\t") /* %xmm14 */
__ASM_CFI(".cfi_escape 0x10,0x20,0x06,0x76,0x10,0x06,0x23,0x90,0x05\n\t") /* %xmm15 */
"movq %r8,%rcx\n\t"
"callq *%rdx\n\t"
__ASM_CFI(".cfi_restore_state\n\t")
"movq %rbp,%rsp\n\t"
__ASM_CFI(".cfi_def_cfa_register %rsp\n\t")
"popq %rbp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
__ASM_CFI(".cfi_same_value %rbp\n\t")
"ret")
/*******************************************************************
* RtlRestoreContext (NTDLL.@)
*/
void WINAPI RtlRestoreContext( CONTEXT *context, EXCEPTION_RECORD *rec )
{
EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
if (rec && rec->ExceptionCode == STATUS_LONGJUMP && rec->NumberParameters >= 1)
{
struct MSVCRT_JUMP_BUFFER *jmp = (struct MSVCRT_JUMP_BUFFER *)rec->ExceptionInformation[0];
context->Rbx = jmp->Rbx;
context->Rsp = jmp->Rsp;
context->Rbp = jmp->Rbp;
context->Rsi = jmp->Rsi;
context->Rdi = jmp->Rdi;
context->R12 = jmp->R12;
context->R13 = jmp->R13;
context->R14 = jmp->R14;
context->R15 = jmp->R15;
context->Rip = jmp->Rip;
context->u.s.Xmm6 = jmp->Xmm6;
context->u.s.Xmm7 = jmp->Xmm7;
context->u.s.Xmm8 = jmp->Xmm8;
context->u.s.Xmm9 = jmp->Xmm9;
context->u.s.Xmm10 = jmp->Xmm10;
context->u.s.Xmm11 = jmp->Xmm11;
context->u.s.Xmm12 = jmp->Xmm12;
context->u.s.Xmm13 = jmp->Xmm13;
context->u.s.Xmm14 = jmp->Xmm14;
context->u.s.Xmm15 = jmp->Xmm15;
}
else if (rec && rec->ExceptionCode == STATUS_UNWIND_CONSOLIDATE && rec->NumberParameters >= 1)
{
PVOID (CALLBACK *consolidate)(EXCEPTION_RECORD *) = (void *)rec->ExceptionInformation[0];
TRACE( "calling consolidate callback %p (rec=%p)\n", consolidate, rec );
context->Rip = (ULONG64)call_consolidate_callback( context, consolidate, rec );
}
/* hack: remove no longer accessible TEB frames */
while ((ULONG64)teb_frame < context->Rsp)
{
TRACE( "removing TEB frame: %p\n", teb_frame );
teb_frame = __wine_pop_frame( teb_frame );
}
TRACE( "returning to %lx stack %lx\n", context->Rip, context->Rsp );
set_cpu_context( context );
}
/*******************************************************************
* RtlUnwindEx (NTDLL.@)
*/
void WINAPI RtlUnwindEx( PVOID end_frame, PVOID target_ip, EXCEPTION_RECORD *rec,
PVOID retval, CONTEXT *context, UNWIND_HISTORY_TABLE *table )
{
EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
EXCEPTION_RECORD record;
DISPATCHER_CONTEXT dispatch;
CONTEXT new_context;
LDR_MODULE *module;
NTSTATUS status;
DWORD i;
RtlCaptureContext( context );
new_context = *context;
/* build an exception record, if we do not have one */
if (!rec)
{
record.ExceptionCode = STATUS_UNWIND;
record.ExceptionFlags = 0;
record.ExceptionRecord = NULL;
record.ExceptionAddress = (void *)context->Rip;
record.NumberParameters = 0;
rec = &record;
}
rec->ExceptionFlags |= EH_UNWINDING | (end_frame ? 0 : EH_EXIT_UNWIND);
TRACE( "code=%x flags=%x end_frame=%p target_ip=%p rip=%016lx\n",
rec->ExceptionCode, rec->ExceptionFlags, end_frame, target_ip, context->Rip );
for (i = 0; i < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); i++)
TRACE( " info[%d]=%016lx\n", i, rec->ExceptionInformation[i] );
TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
context->Rax, context->Rbx, context->Rcx, context->Rdx );
TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
context->Rsi, context->Rdi, context->Rbp, context->Rsp );
TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
context->R8, context->R9, context->R10, context->R11 );
TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
context->R12, context->R13, context->R14, context->R15 );
dispatch.EstablisherFrame = context->Rsp;
dispatch.TargetIp = (ULONG64)target_ip;
dispatch.ContextRecord = context;
dispatch.HistoryTable = table;
for (;;)
{
/* FIXME: should use the history table to make things faster */
dispatch.ImageBase = 0;
dispatch.ScopeIndex = 0;
dispatch.ControlPc = context->Rip;
/* first look for PE exception information */
if ((dispatch.FunctionEntry = lookup_function_info( context->Rip, &dispatch.ImageBase, &module )))
{
dispatch.LanguageHandler = RtlVirtualUnwind( UNW_FLAG_UHANDLER, dispatch.ImageBase,
context->Rip, dispatch.FunctionEntry,
&new_context, &dispatch.HandlerData,
&dispatch.EstablisherFrame, NULL );
goto unwind_done;
}
/* then look for host system exception information */
if (!module || (module->Flags & LDR_WINE_INTERNAL))
{
BOOL got_info = FALSE;
struct dwarf_eh_bases bases;
const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(context->Rip - 1), &bases );
if (fde)
{
status = dwarf_virtual_unwind( context->Rip, &dispatch.EstablisherFrame, &new_context, fde,
&bases, &dispatch.LanguageHandler, &dispatch.HandlerData );
if (status != STATUS_SUCCESS) raise_status( status, rec );
got_info = TRUE;
}
#ifdef HAVE_LIBUNWIND_H
else
{
status = libunwind_virtual_unwind( context->Rip, &got_info, &dispatch.EstablisherFrame, &new_context,
&dispatch.LanguageHandler, &dispatch.HandlerData );
if (status != STATUS_SUCCESS) raise_status( status, rec );
}
#endif
if (got_info)
{
dispatch.FunctionEntry = NULL;
if (dispatch.LanguageHandler && !module)
{
FIXME( "calling personality routine in system library not supported yet\n" );
dispatch.LanguageHandler = NULL;
}
goto unwind_done;
}
}
else WARN( "exception data not found in %s\n", debugstr_w(module->BaseDllName.Buffer) );
/* no exception information, treat as a leaf function */
new_context.Rip = *(ULONG64 *)context->Rsp;
new_context.Rsp = context->Rsp + sizeof(ULONG64);
dispatch.EstablisherFrame = new_context.Rsp;
dispatch.LanguageHandler = NULL;
unwind_done:
if (!dispatch.EstablisherFrame) break;
if (is_inside_signal_stack( (void *)dispatch.EstablisherFrame ))
{
TRACE( "frame %lx is inside signal stack (%p-%p)\n", dispatch.EstablisherFrame,
get_signal_stack(), (char *)get_signal_stack() + signal_stack_size );
*context = new_context;
continue;
}
if ((dispatch.EstablisherFrame & 7) ||
dispatch.EstablisherFrame < (ULONG64)NtCurrentTeb()->Tib.StackLimit ||
dispatch.EstablisherFrame > (ULONG64)NtCurrentTeb()->Tib.StackBase)
{
ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
rec->ExceptionFlags |= EH_STACK_INVALID;
break;
}
if (dispatch.LanguageHandler)
{
if (end_frame && (dispatch.EstablisherFrame > (ULONG64)end_frame))
{
ERR( "invalid end frame %lx/%p\n", dispatch.EstablisherFrame, end_frame );
raise_status( STATUS_INVALID_UNWIND_TARGET, rec );
}
if (dispatch.EstablisherFrame == (ULONG64)end_frame) rec->ExceptionFlags |= EH_TARGET_UNWIND;
if (call_unwind_handler( rec, &dispatch ) == ExceptionCollidedUnwind)
{
ULONG64 frame;
*context = new_context = *dispatch.ContextRecord;
dispatch.ContextRecord = context;
RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
dispatch.ControlPc, dispatch.FunctionEntry,
&new_context, NULL, &frame, NULL );
rec->ExceptionFlags |= EH_COLLIDED_UNWIND;
goto unwind_done;
}
rec->ExceptionFlags &= ~EH_COLLIDED_UNWIND;
}
else /* hack: call builtin handlers registered in the tib list */
{
DWORD64 backup_frame = dispatch.EstablisherFrame;
while ((ULONG64)teb_frame < new_context.Rsp && (ULONG64)teb_frame < (ULONG64)end_frame)
{
TRACE( "found builtin frame %p handler %p\n", teb_frame, teb_frame->Handler );
dispatch.EstablisherFrame = (ULONG64)teb_frame;
if (call_teb_unwind_handler( rec, &dispatch, teb_frame ) == ExceptionCollidedUnwind)
{
ULONG64 frame;
teb_frame = __wine_pop_frame( teb_frame );
*context = new_context = *dispatch.ContextRecord;
dispatch.ContextRecord = context;
RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
dispatch.ControlPc, dispatch.FunctionEntry,
&new_context, NULL, &frame, NULL );
rec->ExceptionFlags |= EH_COLLIDED_UNWIND;
goto unwind_done;
}
teb_frame = __wine_pop_frame( teb_frame );
}
if ((ULONG64)teb_frame == (ULONG64)end_frame && (ULONG64)end_frame < new_context.Rsp) break;
dispatch.EstablisherFrame = backup_frame;
}
if (dispatch.EstablisherFrame == (ULONG64)end_frame) break;
*context = new_context;
}
context->Rax = (ULONG64)retval;
context->Rip = (ULONG64)target_ip;
RtlRestoreContext(context, rec);
}
/*******************************************************************
* RtlUnwind (NTDLL.@)
*/
void WINAPI RtlUnwind( void *frame, void *target_ip, EXCEPTION_RECORD *rec, void *retval )
{
CONTEXT context;
RtlUnwindEx( frame, target_ip, rec, retval, &context, NULL );
}
/*******************************************************************
* _local_unwind (NTDLL.@)
*/
void WINAPI _local_unwind( void *frame, void *target_ip )
{
CONTEXT context;
RtlUnwindEx( frame, target_ip, NULL, NULL, &context, NULL );
}
/*******************************************************************
* __C_specific_handler (NTDLL.@)
*/
EXCEPTION_DISPOSITION WINAPI __C_specific_handler( EXCEPTION_RECORD *rec,
ULONG64 frame,
CONTEXT *context,
struct _DISPATCHER_CONTEXT *dispatch )
{
SCOPE_TABLE *table = dispatch->HandlerData;
ULONG i;
TRACE( "%p %lx %p %p\n", rec, frame, context, dispatch );
if (TRACE_ON(seh)) dump_scope_table( dispatch->ImageBase, table );
if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
{
for (i = dispatch->ScopeIndex; i < table->Count; i++)
{
if (dispatch->ControlPc >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
dispatch->ControlPc < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
{
TERMINATION_HANDLER handler;
if (table->ScopeRecord[i].JumpTarget) continue;
if (rec->ExceptionFlags & EH_TARGET_UNWIND &&
dispatch->TargetIp >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
dispatch->TargetIp < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
{
break;
}
handler = (TERMINATION_HANDLER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress);
dispatch->ScopeIndex = i+1;
TRACE( "calling __finally %p frame %lx\n", handler, frame );
handler( 1, frame );
}
}
return ExceptionContinueSearch;
}
for (i = dispatch->ScopeIndex; i < table->Count; i++)
{
if (dispatch->ControlPc >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
dispatch->ControlPc < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
{
if (!table->ScopeRecord[i].JumpTarget) continue;
if (table->ScopeRecord[i].HandlerAddress != EXCEPTION_EXECUTE_HANDLER)
{
EXCEPTION_POINTERS ptrs;
PC_LANGUAGE_EXCEPTION_HANDLER filter;
filter = (PC_LANGUAGE_EXCEPTION_HANDLER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress);
ptrs.ExceptionRecord = rec;
ptrs.ContextRecord = context;
TRACE( "calling filter %p ptrs %p frame %lx\n", filter, &ptrs, frame );
switch (filter( &ptrs, frame ))
{
case EXCEPTION_EXECUTE_HANDLER:
break;
case EXCEPTION_CONTINUE_SEARCH:
continue;
case EXCEPTION_CONTINUE_EXECUTION:
return ExceptionContinueExecution;
}
}
TRACE( "unwinding to target %lx\n", dispatch->ImageBase + table->ScopeRecord[i].JumpTarget );
RtlUnwindEx( (void *)frame, (char *)dispatch->ImageBase + table->ScopeRecord[i].JumpTarget,
rec, 0, dispatch->ContextRecord, dispatch->HistoryTable );
}
}
return ExceptionContinueSearch;
}
/***********************************************************************
* RtlRaiseException (NTDLL.@)
*/
__ASM_GLOBAL_FUNC( RtlRaiseException,
"movq %rcx,8(%rsp)\n\t"
"sub $0x4f8,%rsp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 0x4f8\n\t")
"leaq 0x20(%rsp),%rcx\n\t"
"call " __ASM_NAME("RtlCaptureContext") "\n\t"
"leaq 0x20(%rsp),%rdx\n\t" /* context pointer */
"leaq 0x500(%rsp),%rax\n\t" /* orig stack pointer */
"movq %rax,0x98(%rdx)\n\t" /* context->Rsp */
"movq (%rax),%rcx\n\t" /* original first parameter */
"movq %rcx,0x80(%rdx)\n\t" /* context->Rcx */
"movq 0x4f8(%rsp),%rax\n\t" /* return address */
"movq %rax,0xf8(%rdx)\n\t" /* context->Rip */
"movq %rax,0x10(%rcx)\n\t" /* rec->ExceptionAddress */
"movl $1,%r8d\n\t"
"call " __ASM_NAME("NtRaiseException") "\n\t"
"movq %rax,%rcx\n\t"
"call " __ASM_NAME("RtlRaiseStatus") /* does not return */ );
/*************************************************************************
* RtlCaptureStackBackTrace (NTDLL.@)
*/
USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
{
FIXME( "(%d, %d, %p, %p) stub!\n", skip, count, buffer, hash );
return 0;
}
/***********************************************************************
* call_thread_func
*/
static void WINAPI call_thread_func( LPTHREAD_START_ROUTINE entry, void *arg )
{
__TRY
{
TRACE_(relay)( "\1Starting thread proc %p (arg=%p)\n", entry, arg );
RtlExitUserThread( entry( arg ));
}
__EXCEPT(unhandled_exception_filter)
{
NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
}
__ENDTRY
abort(); /* should not be reached */
}
extern void DECLSPEC_NORETURN start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend,
void *relay );
__ASM_GLOBAL_FUNC( start_thread,
"subq $56,%rsp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 56\n\t")
"movq %rbp,48(%rsp)\n\t"
__ASM_CFI(".cfi_rel_offset %rbp,48\n\t")
"movq %rbx,40(%rsp)\n\t"
__ASM_CFI(".cfi_rel_offset %rbx,40\n\t")
"movq %r12,32(%rsp)\n\t"
__ASM_CFI(".cfi_rel_offset %r12,32\n\t")
"movq %r13,24(%rsp)\n\t"
__ASM_CFI(".cfi_rel_offset %r13,24\n\t")
"movq %r14,16(%rsp)\n\t"
__ASM_CFI(".cfi_rel_offset %r14,16\n\t")
"movq %r15,8(%rsp)\n\t"
__ASM_CFI(".cfi_rel_offset %r15,8\n\t")
/* store exit frame */
"movq %gs:0x30,%rax\n\t"
"movq %rsp,0x330(%rax)\n\t" /* amd64_thread_data()->exit_frame */
/* switch to thread stack */
"movq 8(%rax),%rax\n\t" /* NtCurrentTeb()->Tib.StackBase */
"leaq -0x1000(%rax),%rsp\n\t"
/* attach dlls */
"call " __ASM_NAME("attach_thread") "\n\t"
"movq %rax,%rsp\n\t"
/* clear the stack */
"andq $~0xfff,%rax\n\t" /* round down to page size */
"movq %rax,%rdi\n\t"
"call " __ASM_NAME("virtual_clear_thread_stack") "\n\t"
/* switch to the initial context */
"movq %rsp,%rdi\n\t"
"call " __ASM_NAME("set_cpu_context") )
extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int) );
__ASM_GLOBAL_FUNC( call_thread_exit_func,
/* fetch exit frame */
"movq %gs:0x30,%rax\n\t"
"movq 0x330(%rax),%rdx\n\t" /* amd64_thread_data()->exit_frame */
"testq %rdx,%rdx\n\t"
"jnz 1f\n\t"
"jmp *%rsi\n"
/* switch to exit frame stack */
"1:\tmovq $0,0x330(%rax)\n\t"
"movq %rdx,%rsp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 56\n\t")
__ASM_CFI(".cfi_rel_offset %rbp,48\n\t")
__ASM_CFI(".cfi_rel_offset %rbx,40\n\t")
__ASM_CFI(".cfi_rel_offset %r12,32\n\t")
__ASM_CFI(".cfi_rel_offset %r13,24\n\t")
__ASM_CFI(".cfi_rel_offset %r14,16\n\t")
__ASM_CFI(".cfi_rel_offset %r15,8\n\t")
"call *%rsi" )
/***********************************************************************
* init_thread_context
*/
static void init_thread_context( CONTEXT *context, LPTHREAD_START_ROUTINE entry, void *arg, void *relay )
{
__asm__( "movw %%cs,%0" : "=m" (context->SegCs) );
__asm__( "movw %%ss,%0" : "=m" (context->SegSs) );
__asm__( "fxsave %0" : "=m" (context->u.FltSave) );
context->Rcx = (ULONG_PTR)entry;
context->Rdx = (ULONG_PTR)arg;
context->Rsp = (ULONG_PTR)NtCurrentTeb()->Tib.StackBase - 0x28;
context->Rip = (ULONG_PTR)relay;
context->EFlags = 0x200;
}
/***********************************************************************
* attach_thread
*/
PCONTEXT DECLSPEC_HIDDEN attach_thread( LPTHREAD_START_ROUTINE entry, void *arg,
BOOL suspend, void *relay )
{
CONTEXT *ctx;
if (suspend)
{
CONTEXT context = { 0 };
context.ContextFlags = CONTEXT_ALL;
init_thread_context( &context, entry, arg, relay );
wait_suspend( &context );
ctx = (CONTEXT *)((ULONG_PTR)context.Rsp & ~15) - 1;
*ctx = context;
}
else
{
ctx = (CONTEXT *)((char *)NtCurrentTeb()->Tib.StackBase - 0x30) - 1;
init_thread_context( ctx, entry, arg, relay );
}
ctx->ContextFlags = CONTEXT_FULL;
attach_dlls( ctx, (void **)&ctx->Rcx );
return ctx;
}
/***********************************************************************
* signal_start_thread
*
* Thread startup sequence:
* signal_start_thread()
* -> start_thread()
* -> call_thread_func()
*/
void signal_start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend )
{
start_thread( entry, arg, suspend, call_thread_func );
}
/**********************************************************************
* signal_start_process
*
* Process startup sequence:
* signal_start_process()
* -> start_thread()
* -> kernel32_start_process()
*/
void signal_start_process( LPTHREAD_START_ROUTINE entry, BOOL suspend )
{
start_thread( entry, NtCurrentTeb()->Peb, suspend, kernel32_start_process );
}
/***********************************************************************
* signal_exit_thread
*/
void signal_exit_thread( int status )
{
call_thread_exit_func( status, exit_thread );
}
/***********************************************************************
* signal_exit_process
*/
void signal_exit_process( int status )
{
call_thread_exit_func( status, exit );
}
/**********************************************************************
* DbgBreakPoint (NTDLL.@)
*/
__ASM_STDCALL_FUNC( DbgBreakPoint, 0, "int $3; ret")
/**********************************************************************
* DbgUserBreakPoint (NTDLL.@)
*/
__ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "int $3; ret")
#endif /* __x86_64__ */
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