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Sweden-Number/dlls/ntdll/unix/signal_x86_64.c

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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
*/
#if 0
#pragma makedep unix
#endif
#ifdef __x86_64__
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <pthread.h>
#include <signal.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/mman.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_MACHINE_SYSARCH_H
# include <machine/sysarch.h>
#endif
#ifdef HAVE_SYS_AUXV_H
# include <sys/auxv.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
# define UNW_LOCAL_ONLY
# include <libunwind.h>
#endif
#ifdef __APPLE__
# include <mach/mach.h>
#endif
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.h"
#include "ddk/wdm.h"
#include "wine/exception.h"
#include "wine/list.h"
#include "wine/asm.h"
#include "unix_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(unwind);
WINE_DECLARE_DEBUG_CHANNEL(seh);
/***********************************************************************
* signal context platform-specific definitions
*/
#ifdef linux
#include <asm/prctl.h>
static inline int arch_prctl( int func, void *ptr ) { return syscall( __NR_arch_prctl, func, ptr ); }
extern int CDECL alloc_fs_sel( int sel, void *base );
__ASM_GLOBAL_FUNC( alloc_fs_sel,
/* switch to 32-bit stack */
"pushq %rbx\n\t"
"pushq %rdi\n\t"
"movq %rsp,%rdi\n\t"
"movq %gs:0x8,%rsp\n\t" /* NtCurrentTeb()->Tib.StackBase */
"subl $0x10,%esp\n\t"
/* setup modify_ldt struct on 32-bit stack */
"movl %ecx,(%rsp)\n\t" /* entry_number */
"movl %edx,4(%rsp)\n\t" /* base */
"movl $~0,8(%rsp)\n\t" /* limit */
"movl $0x41,12(%rsp)\n\t" /* seg_32bit | usable */
/* invoke 32-bit syscall */
"movl %esp,%ebx\n\t"
"movl $0xf3,%eax\n\t" /* SYS_set_thread_area */
"int $0x80\n\t"
/* restore stack */
"movl (%rsp),%eax\n\t" /* entry_number */
"movq %rdi,%rsp\n\t"
"popq %rdi\n\t"
"popq %rbx\n\t"
"ret" );
#ifndef FP_XSTATE_MAGIC1
#define FP_XSTATE_MAGIC1 0x46505853
#endif
#define RAX_sig(context) ((context)->uc_mcontext.gregs[REG_RAX])
#define RBX_sig(context) ((context)->uc_mcontext.gregs[REG_RBX])
#define RCX_sig(context) ((context)->uc_mcontext.gregs[REG_RCX])
#define RDX_sig(context) ((context)->uc_mcontext.gregs[REG_RDX])
#define RSI_sig(context) ((context)->uc_mcontext.gregs[REG_RSI])
#define RDI_sig(context) ((context)->uc_mcontext.gregs[REG_RDI])
#define RBP_sig(context) ((context)->uc_mcontext.gregs[REG_RBP])
#define R8_sig(context) ((context)->uc_mcontext.gregs[REG_R8])
#define R9_sig(context) ((context)->uc_mcontext.gregs[REG_R9])
#define R10_sig(context) ((context)->uc_mcontext.gregs[REG_R10])
#define R11_sig(context) ((context)->uc_mcontext.gregs[REG_R11])
#define R12_sig(context) ((context)->uc_mcontext.gregs[REG_R12])
#define R13_sig(context) ((context)->uc_mcontext.gregs[REG_R13])
#define R14_sig(context) ((context)->uc_mcontext.gregs[REG_R14])
#define R15_sig(context) ((context)->uc_mcontext.gregs[REG_R15])
#define CS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 0))
#define GS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 1))
#define FS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 2))
#define RSP_sig(context) ((context)->uc_mcontext.gregs[REG_RSP])
#define RIP_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
#define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
#define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
#define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
#define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.fpregs))
#define XState_sig(fpu) (((unsigned int *)fpu->Reserved4)[12] == FP_XSTATE_MAGIC1 ? (XSTATE *)(fpu + 1) : NULL)
#elif defined(__FreeBSD__) || defined (__FreeBSD_kernel__)
#define RAX_sig(context) ((context)->uc_mcontext.mc_rax)
#define RBX_sig(context) ((context)->uc_mcontext.mc_rbx)
#define RCX_sig(context) ((context)->uc_mcontext.mc_rcx)
#define RDX_sig(context) ((context)->uc_mcontext.mc_rdx)
#define RSI_sig(context) ((context)->uc_mcontext.mc_rsi)
#define RDI_sig(context) ((context)->uc_mcontext.mc_rdi)
#define RBP_sig(context) ((context)->uc_mcontext.mc_rbp)
#define R8_sig(context) ((context)->uc_mcontext.mc_r8)
#define R9_sig(context) ((context)->uc_mcontext.mc_r9)
#define R10_sig(context) ((context)->uc_mcontext.mc_r10)
#define R11_sig(context) ((context)->uc_mcontext.mc_r11)
#define R12_sig(context) ((context)->uc_mcontext.mc_r12)
#define R13_sig(context) ((context)->uc_mcontext.mc_r13)
#define R14_sig(context) ((context)->uc_mcontext.mc_r14)
#define R15_sig(context) ((context)->uc_mcontext.mc_r15)
#define CS_sig(context) ((context)->uc_mcontext.mc_cs)
#define DS_sig(context) ((context)->uc_mcontext.mc_ds)
#define ES_sig(context) ((context)->uc_mcontext.mc_es)
#define FS_sig(context) ((context)->uc_mcontext.mc_fs)
#define GS_sig(context) ((context)->uc_mcontext.mc_gs)
#define SS_sig(context) ((context)->uc_mcontext.mc_ss)
#define EFL_sig(context) ((context)->uc_mcontext.mc_rflags)
#define RIP_sig(context) ((context)->uc_mcontext.mc_rip)
#define RSP_sig(context) ((context)->uc_mcontext.mc_rsp)
#define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
#define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
#define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.mc_fpstate))
#define XState_sig(context) NULL
#elif defined(__NetBSD__)
#define RAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RAX])
#define RBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBX])
#define RCX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RCX])
#define RDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDX])
#define RSI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RSI])
#define RDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_RDI])
#define RBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_RBP])
#define R8_sig(context) ((context)->uc_mcontext.__gregs[_REG_R8])
#define R9_sig(context) ((context)->uc_mcontext.__gregs[_REG_R9])
#define R10_sig(context) ((context)->uc_mcontext.__gregs[_REG_R10])
#define R11_sig(context) ((context)->uc_mcontext.__gregs[_REG_R11])
#define R12_sig(context) ((context)->uc_mcontext.__gregs[_REG_R12])
#define R13_sig(context) ((context)->uc_mcontext.__gregs[_REG_R13])
#define R14_sig(context) ((context)->uc_mcontext.__gregs[_REG_R14])
#define R15_sig(context) ((context)->uc_mcontext.__gregs[_REG_R15])
#define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
#define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
#define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
#define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
#define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
#define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
#define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_RFL])
#define RIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_RIP]))
#define RSP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.__gregs[_REG_URSP]))
#define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
#define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
#define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.__fpregs))
#define XState_sig(context) NULL
#elif defined (__APPLE__)
#define RAX_sig(context) ((context)->uc_mcontext->__ss.__rax)
#define RBX_sig(context) ((context)->uc_mcontext->__ss.__rbx)
#define RCX_sig(context) ((context)->uc_mcontext->__ss.__rcx)
#define RDX_sig(context) ((context)->uc_mcontext->__ss.__rdx)
#define RSI_sig(context) ((context)->uc_mcontext->__ss.__rsi)
#define RDI_sig(context) ((context)->uc_mcontext->__ss.__rdi)
#define RBP_sig(context) ((context)->uc_mcontext->__ss.__rbp)
#define R8_sig(context) ((context)->uc_mcontext->__ss.__r8)
#define R9_sig(context) ((context)->uc_mcontext->__ss.__r9)
#define R10_sig(context) ((context)->uc_mcontext->__ss.__r10)
#define R11_sig(context) ((context)->uc_mcontext->__ss.__r11)
#define R12_sig(context) ((context)->uc_mcontext->__ss.__r12)
#define R13_sig(context) ((context)->uc_mcontext->__ss.__r13)
#define R14_sig(context) ((context)->uc_mcontext->__ss.__r14)
#define R15_sig(context) ((context)->uc_mcontext->__ss.__r15)
#define CS_sig(context) ((context)->uc_mcontext->__ss.__cs)
#define FS_sig(context) ((context)->uc_mcontext->__ss.__fs)
#define GS_sig(context) ((context)->uc_mcontext->__ss.__gs)
#define EFL_sig(context) ((context)->uc_mcontext->__ss.__rflags)
#define RIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__rip))
#define RSP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__rsp))
#define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno)
#define ERROR_sig(context) ((context)->uc_mcontext->__es.__err)
#define FPU_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->__fs.__fpu_fcw)
#define XState_sig(context) NULL
#else
#error You must define the signal context functions for your platform
#endif
enum i386_trap_code
{
TRAP_x86_DIVIDE = 0, /* Division by zero exception */
TRAP_x86_TRCTRAP = 1, /* Single-step exception */
TRAP_x86_NMI = 2, /* NMI interrupt */
TRAP_x86_BPTFLT = 3, /* Breakpoint exception */
TRAP_x86_OFLOW = 4, /* Overflow exception */
TRAP_x86_BOUND = 5, /* Bound range exception */
TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */
TRAP_x86_DNA = 7, /* Device not available exception */
TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */
TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */
TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */
TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */
TRAP_x86_STKFLT = 12, /* Stack fault */
TRAP_x86_PROTFLT = 13, /* General protection fault */
TRAP_x86_PAGEFLT = 14, /* Page fault */
TRAP_x86_ARITHTRAP = 16, /* Floating point exception */
TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */
TRAP_x86_MCHK = 18, /* Machine check exception */
TRAP_x86_CACHEFLT = 19 /* Cache flush exception */
};
/* stack layout when calling an exception raise function */
struct stack_layout
{
CONTEXT context;
CONTEXT_EX context_ex;
EXCEPTION_RECORD rec;
ULONG64 align;
char xstate[0]; /* If xstate is present it is allocated
* dynamically to provide 64 byte alignment. */
};
C_ASSERT((offsetof(struct stack_layout, xstate) == sizeof(struct stack_layout)));
C_ASSERT( sizeof(XSTATE) == 0x140 );
C_ASSERT( sizeof(struct stack_layout) == 0x590 ); /* Should match the size in call_user_exception_dispatcher(). */
/* flags to control the behavior of the syscall dispatcher */
#define SYSCALL_HAVE_XSAVE 1
#define SYSCALL_HAVE_XSAVEC 2
#define SYSCALL_HAVE_PTHREAD_TEB 4
#define SYSCALL_HAVE_WRFSGSBASE 8
/* stack layout when calling an user apc function.
* FIXME: match Windows ABI. */
struct apc_stack_layout
{
ULONG64 save_regs[4];
void *func;
ULONG64 align;
CONTEXT context;
ULONG64 rbp;
ULONG64 rip;
};
struct syscall_frame
{
ULONG64 rax; /* 0000 */
ULONG64 rbx; /* 0008 */
ULONG64 rcx; /* 0010 */
ULONG64 rdx; /* 0018 */
ULONG64 rsi; /* 0020 */
ULONG64 rdi; /* 0028 */
ULONG64 r8; /* 0030 */
ULONG64 r9; /* 0038 */
ULONG64 r10; /* 0040 */
ULONG64 r11; /* 0048 */
ULONG64 r12; /* 0050 */
ULONG64 r13; /* 0058 */
ULONG64 r14; /* 0060 */
ULONG64 r15; /* 0068 */
ULONG64 rip; /* 0070 */
WORD cs; /* 0078 */
WORD ds; /* 007a */
WORD es; /* 007c */
WORD fs; /* 007e */
ULONG64 eflags; /* 0080 */
ULONG64 rsp; /* 0088 */
WORD ss; /* 0090 */
WORD gs; /* 0092 */
DWORD restore_flags; /* 0094 */
ULONG64 rbp; /* 0098 */
ULONG64 align[4]; /* 00a0 */
XMM_SAVE_AREA32 xsave; /* 00c0 */
XSTATE xstate; /* 02c0 */
};
C_ASSERT( sizeof( struct syscall_frame ) == 0x400);
struct amd64_thread_data
{
DWORD_PTR dr0; /* 02f0 debug registers */
DWORD_PTR dr1; /* 02f8 */
DWORD_PTR dr2; /* 0300 */
DWORD_PTR dr3; /* 0308 */
DWORD_PTR dr6; /* 0310 */
DWORD_PTR dr7; /* 0318 */
void *exit_frame; /* 0320 exit frame pointer */
struct syscall_frame *syscall_frame; /* 0328 syscall frame pointer */
void *pthread_teb; /* 0330 thread data for pthread */
};
C_ASSERT( sizeof(struct amd64_thread_data) <= sizeof(((struct ntdll_thread_data *)0)->cpu_data) );
C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct amd64_thread_data, exit_frame ) == 0x320 );
C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct amd64_thread_data, syscall_frame ) == 0x328 );
C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct amd64_thread_data, pthread_teb ) == 0x330 );
static inline struct amd64_thread_data *amd64_thread_data(void)
{
return (struct amd64_thread_data *)ntdll_get_thread_data()->cpu_data;
}
static BOOL is_inside_syscall( ucontext_t *sigcontext )
{
return ((char *)RSP_sig(sigcontext) >= (char *)ntdll_get_thread_data()->kernel_stack &&
(char *)RSP_sig(sigcontext) <= (char *)amd64_thread_data()->syscall_frame);
}
struct xcontext
{
CONTEXT c;
CONTEXT_EX c_ex;
ULONG64 host_compaction_mask;
};
extern BOOL xstate_compaction_enabled DECLSPEC_HIDDEN;
static inline XSTATE *xstate_from_context( const CONTEXT *context )
{
CONTEXT_EX *xctx = (CONTEXT_EX *)(context + 1);
if ((context->ContextFlags & CONTEXT_XSTATE) != CONTEXT_XSTATE) return NULL;
return (XSTATE *)((char *)xctx + xctx->XState.Offset);
}
static inline void context_init_xstate( CONTEXT *context, void *xstate_buffer )
{
CONTEXT_EX *xctx;
xctx = (CONTEXT_EX *)(context + 1);
xctx->Legacy.Length = sizeof(CONTEXT);
xctx->Legacy.Offset = -(LONG)sizeof(CONTEXT);
xctx->XState.Length = sizeof(XSTATE);
xctx->XState.Offset = (BYTE *)xstate_buffer - (BYTE *)xctx;
xctx->All.Length = sizeof(CONTEXT) + xctx->XState.Offset + xctx->XState.Length;
xctx->All.Offset = -(LONG)sizeof(CONTEXT);
context->ContextFlags |= CONTEXT_XSTATE;
}
static USHORT cs32_sel; /* selector for %cs in 32-bit mode */
static USHORT cs64_sel; /* selector for %cs in 64-bit mode */
static USHORT ds64_sel; /* selector for %ds/%es/%ss in 64-bit mode */
static USHORT fs32_sel; /* selector for %fs in 32-bit mode */
/***********************************************************************
* Definitions for Dwarf unwind tables
*/
enum dwarf_call_frame_info
{
DW_CFA_advance_loc = 0x40,
DW_CFA_offset = 0x80,
DW_CFA_restore = 0xc0,
DW_CFA_nop = 0x00,
DW_CFA_set_loc = 0x01,
DW_CFA_advance_loc1 = 0x02,
DW_CFA_advance_loc2 = 0x03,
DW_CFA_advance_loc4 = 0x04,
DW_CFA_offset_extended = 0x05,
DW_CFA_restore_extended = 0x06,
DW_CFA_undefined = 0x07,
DW_CFA_same_value = 0x08,
DW_CFA_register = 0x09,
DW_CFA_remember_state = 0x0a,
DW_CFA_restore_state = 0x0b,
DW_CFA_def_cfa = 0x0c,
DW_CFA_def_cfa_register = 0x0d,
DW_CFA_def_cfa_offset = 0x0e,
DW_CFA_def_cfa_expression = 0x0f,
DW_CFA_expression = 0x10,
DW_CFA_offset_extended_sf = 0x11,
DW_CFA_def_cfa_sf = 0x12,
DW_CFA_def_cfa_offset_sf = 0x13,
DW_CFA_val_offset = 0x14,
DW_CFA_val_offset_sf = 0x15,
DW_CFA_val_expression = 0x16,
};
enum dwarf_operation
{
DW_OP_addr = 0x03,
DW_OP_deref = 0x06,
DW_OP_const1u = 0x08,
DW_OP_const1s = 0x09,
DW_OP_const2u = 0x0a,
DW_OP_const2s = 0x0b,
DW_OP_const4u = 0x0c,
DW_OP_const4s = 0x0d,
DW_OP_const8u = 0x0e,
DW_OP_const8s = 0x0f,
DW_OP_constu = 0x10,
DW_OP_consts = 0x11,
DW_OP_dup = 0x12,
DW_OP_drop = 0x13,
DW_OP_over = 0x14,
DW_OP_pick = 0x15,
DW_OP_swap = 0x16,
DW_OP_rot = 0x17,
DW_OP_xderef = 0x18,
DW_OP_abs = 0x19,
DW_OP_and = 0x1a,
DW_OP_div = 0x1b,
DW_OP_minus = 0x1c,
DW_OP_mod = 0x1d,
DW_OP_mul = 0x1e,
DW_OP_neg = 0x1f,
DW_OP_not = 0x20,
DW_OP_or = 0x21,
DW_OP_plus = 0x22,
DW_OP_plus_uconst = 0x23,
DW_OP_shl = 0x24,
DW_OP_shr = 0x25,
DW_OP_shra = 0x26,
DW_OP_xor = 0x27,
DW_OP_bra = 0x28,
DW_OP_eq = 0x29,
DW_OP_ge = 0x2a,
DW_OP_gt = 0x2b,
DW_OP_le = 0x2c,
DW_OP_lt = 0x2d,
DW_OP_ne = 0x2e,
DW_OP_skip = 0x2f,
DW_OP_lit0 = 0x30,
DW_OP_lit1 = 0x31,
DW_OP_lit2 = 0x32,
DW_OP_lit3 = 0x33,
DW_OP_lit4 = 0x34,
DW_OP_lit5 = 0x35,
DW_OP_lit6 = 0x36,
DW_OP_lit7 = 0x37,
DW_OP_lit8 = 0x38,
DW_OP_lit9 = 0x39,
DW_OP_lit10 = 0x3a,
DW_OP_lit11 = 0x3b,
DW_OP_lit12 = 0x3c,
DW_OP_lit13 = 0x3d,
DW_OP_lit14 = 0x3e,
DW_OP_lit15 = 0x3f,
DW_OP_lit16 = 0x40,
DW_OP_lit17 = 0x41,
DW_OP_lit18 = 0x42,
DW_OP_lit19 = 0x43,
DW_OP_lit20 = 0x44,
DW_OP_lit21 = 0x45,
DW_OP_lit22 = 0x46,
DW_OP_lit23 = 0x47,
DW_OP_lit24 = 0x48,
DW_OP_lit25 = 0x49,
DW_OP_lit26 = 0x4a,
DW_OP_lit27 = 0x4b,
DW_OP_lit28 = 0x4c,
DW_OP_lit29 = 0x4d,
DW_OP_lit30 = 0x4e,
DW_OP_lit31 = 0x4f,
DW_OP_reg0 = 0x50,
DW_OP_reg1 = 0x51,
DW_OP_reg2 = 0x52,
DW_OP_reg3 = 0x53,
DW_OP_reg4 = 0x54,
DW_OP_reg5 = 0x55,
DW_OP_reg6 = 0x56,
DW_OP_reg7 = 0x57,
DW_OP_reg8 = 0x58,
DW_OP_reg9 = 0x59,
DW_OP_reg10 = 0x5a,
DW_OP_reg11 = 0x5b,
DW_OP_reg12 = 0x5c,
DW_OP_reg13 = 0x5d,
DW_OP_reg14 = 0x5e,
DW_OP_reg15 = 0x5f,
DW_OP_reg16 = 0x60,
DW_OP_reg17 = 0x61,
DW_OP_reg18 = 0x62,
DW_OP_reg19 = 0x63,
DW_OP_reg20 = 0x64,
DW_OP_reg21 = 0x65,
DW_OP_reg22 = 0x66,
DW_OP_reg23 = 0x67,
DW_OP_reg24 = 0x68,
DW_OP_reg25 = 0x69,
DW_OP_reg26 = 0x6a,
DW_OP_reg27 = 0x6b,
DW_OP_reg28 = 0x6c,
DW_OP_reg29 = 0x6d,
DW_OP_reg30 = 0x6e,
DW_OP_reg31 = 0x6f,
DW_OP_breg0 = 0x70,
DW_OP_breg1 = 0x71,
DW_OP_breg2 = 0x72,
DW_OP_breg3 = 0x73,
DW_OP_breg4 = 0x74,
DW_OP_breg5 = 0x75,
DW_OP_breg6 = 0x76,
DW_OP_breg7 = 0x77,
DW_OP_breg8 = 0x78,
DW_OP_breg9 = 0x79,
DW_OP_breg10 = 0x7a,
DW_OP_breg11 = 0x7b,
DW_OP_breg12 = 0x7c,
DW_OP_breg13 = 0x7d,
DW_OP_breg14 = 0x7e,
DW_OP_breg15 = 0x7f,
DW_OP_breg16 = 0x80,
DW_OP_breg17 = 0x81,
DW_OP_breg18 = 0x82,
DW_OP_breg19 = 0x83,
DW_OP_breg20 = 0x84,
DW_OP_breg21 = 0x85,
DW_OP_breg22 = 0x86,
DW_OP_breg23 = 0x87,
DW_OP_breg24 = 0x88,
DW_OP_breg25 = 0x89,
DW_OP_breg26 = 0x8a,
DW_OP_breg27 = 0x8b,
DW_OP_breg28 = 0x8c,
DW_OP_breg29 = 0x8d,
DW_OP_breg30 = 0x8e,
DW_OP_breg31 = 0x8f,
DW_OP_regx = 0x90,
DW_OP_fbreg = 0x91,
DW_OP_bregx = 0x92,
DW_OP_piece = 0x93,
DW_OP_deref_size = 0x94,
DW_OP_xderef_size = 0x95,
DW_OP_nop = 0x96,
DW_OP_push_object_address = 0x97,
DW_OP_call2 = 0x98,
DW_OP_call4 = 0x99,
DW_OP_call_ref = 0x9a,
DW_OP_form_tls_address = 0x9b,
DW_OP_call_frame_cfa = 0x9c,
DW_OP_bit_piece = 0x9d,
DW_OP_lo_user = 0xe0,
DW_OP_hi_user = 0xff,
DW_OP_GNU_push_tls_address = 0xe0,
DW_OP_GNU_uninit = 0xf0,
DW_OP_GNU_encoded_addr = 0xf1,
};
#define DW_EH_PE_native 0x00
#define DW_EH_PE_uleb128 0x01
#define DW_EH_PE_udata2 0x02
#define DW_EH_PE_udata4 0x03
#define DW_EH_PE_udata8 0x04
#define DW_EH_PE_sleb128 0x09
#define DW_EH_PE_sdata2 0x0a
#define DW_EH_PE_sdata4 0x0b
#define DW_EH_PE_sdata8 0x0c
#define DW_EH_PE_signed 0x08
#define DW_EH_PE_abs 0x00
#define DW_EH_PE_pcrel 0x10
#define DW_EH_PE_textrel 0x20
#define DW_EH_PE_datarel 0x30
#define DW_EH_PE_funcrel 0x40
#define DW_EH_PE_aligned 0x50
#define DW_EH_PE_indirect 0x80
#define DW_EH_PE_omit 0xff
struct dwarf_eh_bases
{
void *tbase;
void *dbase;
void *func;
};
struct dwarf_cie
{
unsigned int length;
int id;
unsigned char version;
unsigned char augmentation[1];
};
struct dwarf_fde
{
unsigned int length;
unsigned int cie_offset;
};
extern const struct dwarf_fde *_Unwind_Find_FDE (void *, struct dwarf_eh_bases *);
static unsigned char dwarf_get_u1( const unsigned char **p )
{
return *(*p)++;
}
static unsigned short dwarf_get_u2( const unsigned char **p )
{
unsigned int ret = (*p)[0] | ((*p)[1] << 8);
(*p) += 2;
return ret;
}
static unsigned int dwarf_get_u4( const unsigned char **p )
{
unsigned int ret = (*p)[0] | ((*p)[1] << 8) | ((*p)[2] << 16) | ((*p)[3] << 24);
(*p) += 4;
return ret;
}
static ULONG64 dwarf_get_u8( const unsigned char **p )
{
ULONG64 low = dwarf_get_u4( p );
ULONG64 high = dwarf_get_u4( p );
return low | (high << 32);
}
static ULONG_PTR dwarf_get_uleb128( const unsigned char **p )
{
ULONG_PTR ret = 0;
unsigned int shift = 0;
unsigned char byte;
do
{
byte = **p;
ret |= (ULONG_PTR)(byte & 0x7f) << shift;
shift += 7;
(*p)++;
} while (byte & 0x80);
return ret;
}
static LONG_PTR dwarf_get_sleb128( const unsigned char **p )
{
ULONG_PTR ret = 0;
unsigned int shift = 0;
unsigned char byte;
do
{
byte = **p;
ret |= (ULONG_PTR)(byte & 0x7f) << shift;
shift += 7;
(*p)++;
} while (byte & 0x80);
if ((shift < 8 * sizeof(ret)) && (byte & 0x40)) ret |= -((ULONG_PTR)1 << shift);
return ret;
}
static ULONG_PTR dwarf_get_ptr( const unsigned char **p, unsigned char encoding, const struct dwarf_eh_bases *bases )
{
ULONG_PTR base;
if (encoding == DW_EH_PE_omit) return 0;
switch (encoding & 0x70)
{
case DW_EH_PE_abs:
base = 0;
break;
case DW_EH_PE_pcrel:
base = (ULONG_PTR)*p;
break;
case DW_EH_PE_textrel:
base = (ULONG_PTR)bases->tbase;
break;
case DW_EH_PE_datarel:
base = (ULONG_PTR)bases->dbase;
break;
case DW_EH_PE_funcrel:
base = (ULONG_PTR)bases->func;
break;
case DW_EH_PE_aligned:
base = ((ULONG_PTR)*p + 7) & ~7ul;
break;
default:
FIXME( "unsupported encoding %02x\n", encoding );
return 0;
}
switch (encoding & 0x0f)
{
case DW_EH_PE_native: base += dwarf_get_u8( p ); break;
case DW_EH_PE_uleb128: base += dwarf_get_uleb128( p ); break;
case DW_EH_PE_udata2: base += dwarf_get_u2( p ); break;
case DW_EH_PE_udata4: base += dwarf_get_u4( p ); break;
case DW_EH_PE_udata8: base += dwarf_get_u8( p ); break;
case DW_EH_PE_sleb128: base += dwarf_get_sleb128( p ); break;
case DW_EH_PE_sdata2: base += (signed short)dwarf_get_u2( p ); break;
case DW_EH_PE_sdata4: base += (signed int)dwarf_get_u4( p ); break;
case DW_EH_PE_sdata8: base += (LONG64)dwarf_get_u8( p ); break;
default:
FIXME( "unsupported encoding %02x\n", encoding );
return 0;
}
if (encoding & DW_EH_PE_indirect) base = *(ULONG_PTR *)base;
return base;
}
enum reg_rule
{
RULE_UNSET, /* not set at all */
RULE_UNDEFINED, /* undefined value */
RULE_SAME, /* same value as previous frame */
RULE_CFA_OFFSET, /* stored at cfa offset */
RULE_OTHER_REG, /* stored in other register */
RULE_EXPRESSION, /* address specified by expression */
RULE_VAL_EXPRESSION /* value specified by expression */
};
#define NB_FRAME_REGS 41
#define MAX_SAVED_STATES 16
struct frame_state
{
ULONG_PTR cfa_offset;
unsigned char cfa_reg;
enum reg_rule cfa_rule;
enum reg_rule rules[NB_FRAME_REGS];
ULONG64 regs[NB_FRAME_REGS];
};
struct frame_info
{
ULONG_PTR ip;
ULONG_PTR code_align;
LONG_PTR data_align;
unsigned char retaddr_reg;
unsigned char fde_encoding;
unsigned char signal_frame;
unsigned char state_sp;
struct frame_state state;
struct frame_state *state_stack;
};
static const char *dwarf_reg_names[NB_FRAME_REGS] =
{
/* 0-7 */ "%rax", "%rdx", "%rcx", "%rbx", "%rsi", "%rdi", "%rbp", "%rsp",
/* 8-16 */ "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", "%rip",
/* 17-24 */ "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7",
/* 25-32 */ "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm12", "%xmm13", "%xmm14", "%xmm15",
/* 33-40 */ "%st0", "%st1", "%st2", "%st3", "%st4", "%st5", "%st6", "%st7"
};
static BOOL valid_reg( ULONG_PTR reg )
{
if (reg >= NB_FRAME_REGS) FIXME( "unsupported reg %lx\n", reg );
return (reg < NB_FRAME_REGS);
}
static void execute_cfa_instructions( const unsigned char *ptr, const unsigned char *end,
ULONG_PTR last_ip, struct frame_info *info,
const struct dwarf_eh_bases *bases )
{
while (ptr < end && info->ip < last_ip + info->signal_frame)
{
enum dwarf_call_frame_info op = *ptr++;
if (op & 0xc0)
{
switch (op & 0xc0)
{
case DW_CFA_advance_loc:
{
ULONG_PTR offset = (op & 0x3f) * info->code_align;
TRACE( "%lx: DW_CFA_advance_loc %lu\n", info->ip, offset );
info->ip += offset;
break;
}
case DW_CFA_offset:
{
ULONG_PTR reg = op & 0x3f;
LONG_PTR offset = dwarf_get_uleb128( &ptr ) * info->data_align;
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_offset %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
info->state.regs[reg] = offset;
info->state.rules[reg] = RULE_CFA_OFFSET;
break;
}
case DW_CFA_restore:
{
ULONG_PTR reg = op & 0x3f;
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_restore %s\n", info->ip, dwarf_reg_names[reg] );
info->state.rules[reg] = RULE_UNSET;
break;
}
}
}
else switch (op)
{
case DW_CFA_nop:
break;
case DW_CFA_set_loc:
{
ULONG_PTR loc = dwarf_get_ptr( &ptr, info->fde_encoding, bases );
TRACE( "%lx: DW_CFA_set_loc %lx\n", info->ip, loc );
info->ip = loc;
break;
}
case DW_CFA_advance_loc1:
{
ULONG_PTR offset = *ptr++ * info->code_align;
TRACE( "%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset );
info->ip += offset;
break;
}
case DW_CFA_advance_loc2:
{
ULONG_PTR offset = dwarf_get_u2( &ptr ) * info->code_align;
TRACE( "%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset );
info->ip += offset;
break;
}
case DW_CFA_advance_loc4:
{
ULONG_PTR offset = dwarf_get_u4( &ptr ) * info->code_align;
TRACE( "%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset );
info->ip += offset;
break;
}
case DW_CFA_offset_extended:
case DW_CFA_offset_extended_sf:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf_get_uleb128( &ptr ) * info->data_align
: dwarf_get_sleb128( &ptr ) * info->data_align;
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_offset_extended %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
info->state.regs[reg] = offset;
info->state.rules[reg] = RULE_CFA_OFFSET;
break;
}
case DW_CFA_restore_extended:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_restore_extended %s\n", info->ip, dwarf_reg_names[reg] );
info->state.rules[reg] = RULE_UNSET;
break;
}
case DW_CFA_undefined:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_undefined %s\n", info->ip, dwarf_reg_names[reg] );
info->state.rules[reg] = RULE_UNDEFINED;
break;
}
case DW_CFA_same_value:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_same_value %s\n", info->ip, dwarf_reg_names[reg] );
info->state.regs[reg] = reg;
info->state.rules[reg] = RULE_SAME;
break;
}
case DW_CFA_register:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
ULONG_PTR reg2 = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg ) || !valid_reg( reg2 )) break;
TRACE( "%lx: DW_CFA_register %s == %s\n", info->ip, dwarf_reg_names[reg], dwarf_reg_names[reg2] );
info->state.regs[reg] = reg2;
info->state.rules[reg] = RULE_OTHER_REG;
break;
}
case DW_CFA_remember_state:
TRACE( "%lx: DW_CFA_remember_state\n", info->ip );
if (info->state_sp >= MAX_SAVED_STATES)
FIXME( "%lx: DW_CFA_remember_state too many nested saves\n", info->ip );
else
info->state_stack[info->state_sp++] = info->state;
break;
case DW_CFA_restore_state:
TRACE( "%lx: DW_CFA_restore_state\n", info->ip );
if (!info->state_sp)
FIXME( "%lx: DW_CFA_restore_state without corresponding save\n", info->ip );
else
info->state = info->state_stack[--info->state_sp];
break;
case DW_CFA_def_cfa:
case DW_CFA_def_cfa_sf:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf_get_uleb128( &ptr )
: dwarf_get_sleb128( &ptr ) * info->data_align;
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_def_cfa %s, %lu\n", info->ip, dwarf_reg_names[reg], offset );
info->state.cfa_reg = reg;
info->state.cfa_offset = offset;
info->state.cfa_rule = RULE_CFA_OFFSET;
break;
}
case DW_CFA_def_cfa_register:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_def_cfa_register %s\n", info->ip, dwarf_reg_names[reg] );
info->state.cfa_reg = reg;
info->state.cfa_rule = RULE_CFA_OFFSET;
break;
}
case DW_CFA_def_cfa_offset:
case DW_CFA_def_cfa_offset_sf:
{
ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf_get_uleb128( &ptr )
: dwarf_get_sleb128( &ptr ) * info->data_align;
TRACE( "%lx: DW_CFA_def_cfa_offset %lu\n", info->ip, offset );
info->state.cfa_offset = offset;
info->state.cfa_rule = RULE_CFA_OFFSET;
break;
}
case DW_CFA_def_cfa_expression:
{
ULONG_PTR expr = (ULONG_PTR)ptr;
ULONG_PTR len = dwarf_get_uleb128( &ptr );
TRACE( "%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len );
info->state.cfa_offset = expr;
info->state.cfa_rule = RULE_VAL_EXPRESSION;
ptr += len;
break;
}
case DW_CFA_expression:
case DW_CFA_val_expression:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
ULONG_PTR expr = (ULONG_PTR)ptr;
ULONG_PTR len = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_%sexpression %s %lx-%lx\n",
info->ip, (op == DW_CFA_expression) ? "" : "val_", dwarf_reg_names[reg], expr, expr+len );
info->state.regs[reg] = expr;
info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
ptr += len;
break;
}
default:
FIXME( "%lx: unknown CFA opcode %02x\n", info->ip, op );
break;
}
}
}
/* retrieve a context register from its dwarf number */
static void *get_context_reg( CONTEXT *context, ULONG_PTR dw_reg )
{
switch (dw_reg)
{
case 0: return &context->Rax;
case 1: return &context->Rdx;
case 2: return &context->Rcx;
case 3: return &context->Rbx;
case 4: return &context->Rsi;
case 5: return &context->Rdi;
case 6: return &context->Rbp;
case 7: return &context->Rsp;
case 8: return &context->R8;
case 9: return &context->R9;
case 10: return &context->R10;
case 11: return &context->R11;
case 12: return &context->R12;
case 13: return &context->R13;
case 14: return &context->R14;
case 15: return &context->R15;
case 16: return &context->Rip;
case 17: return &context->u.s.Xmm0;
case 18: return &context->u.s.Xmm1;
case 19: return &context->u.s.Xmm2;
case 20: return &context->u.s.Xmm3;
case 21: return &context->u.s.Xmm4;
case 22: return &context->u.s.Xmm5;
case 23: return &context->u.s.Xmm6;
case 24: return &context->u.s.Xmm7;
case 25: return &context->u.s.Xmm8;
case 26: return &context->u.s.Xmm9;
case 27: return &context->u.s.Xmm10;
case 28: return &context->u.s.Xmm11;
case 29: return &context->u.s.Xmm12;
case 30: return &context->u.s.Xmm13;
case 31: return &context->u.s.Xmm14;
case 32: return &context->u.s.Xmm15;
case 33: return &context->u.s.Legacy[0];
case 34: return &context->u.s.Legacy[1];
case 35: return &context->u.s.Legacy[2];
case 36: return &context->u.s.Legacy[3];
case 37: return &context->u.s.Legacy[4];
case 38: return &context->u.s.Legacy[5];
case 39: return &context->u.s.Legacy[6];
case 40: return &context->u.s.Legacy[7];
default: return NULL;
}
}
/* set a context register from its dwarf number */
static void set_context_reg( CONTEXT *context, ULONG_PTR dw_reg, void *val )
{
switch (dw_reg)
{
case 0: context->Rax = *(ULONG64 *)val; break;
case 1: context->Rdx = *(ULONG64 *)val; break;
case 2: context->Rcx = *(ULONG64 *)val; break;
case 3: context->Rbx = *(ULONG64 *)val; break;
case 4: context->Rsi = *(ULONG64 *)val; break;
case 5: context->Rdi = *(ULONG64 *)val; break;
case 6: context->Rbp = *(ULONG64 *)val; break;
case 7: context->Rsp = *(ULONG64 *)val; break;
case 8: context->R8 = *(ULONG64 *)val; break;
case 9: context->R9 = *(ULONG64 *)val; break;
case 10: context->R10 = *(ULONG64 *)val; break;
case 11: context->R11 = *(ULONG64 *)val; break;
case 12: context->R12 = *(ULONG64 *)val; break;
case 13: context->R13 = *(ULONG64 *)val; break;
case 14: context->R14 = *(ULONG64 *)val; break;
case 15: context->R15 = *(ULONG64 *)val; break;
case 16: context->Rip = *(ULONG64 *)val; break;
case 17: memcpy( &context->u.s.Xmm0, val, sizeof(M128A) ); break;
case 18: memcpy( &context->u.s.Xmm1, val, sizeof(M128A) ); break;
case 19: memcpy( &context->u.s.Xmm2, val, sizeof(M128A) ); break;
case 20: memcpy( &context->u.s.Xmm3, val, sizeof(M128A) ); break;
case 21: memcpy( &context->u.s.Xmm4, val, sizeof(M128A) ); break;
case 22: memcpy( &context->u.s.Xmm5, val, sizeof(M128A) ); break;
case 23: memcpy( &context->u.s.Xmm6, val, sizeof(M128A) ); break;
case 24: memcpy( &context->u.s.Xmm7, val, sizeof(M128A) ); break;
case 25: memcpy( &context->u.s.Xmm8, val, sizeof(M128A) ); break;
case 26: memcpy( &context->u.s.Xmm9, val, sizeof(M128A) ); break;
case 27: memcpy( &context->u.s.Xmm10, val, sizeof(M128A) ); break;
case 28: memcpy( &context->u.s.Xmm11, val, sizeof(M128A) ); break;
case 29: memcpy( &context->u.s.Xmm12, val, sizeof(M128A) ); break;
case 30: memcpy( &context->u.s.Xmm13, val, sizeof(M128A) ); break;
case 31: memcpy( &context->u.s.Xmm14, val, sizeof(M128A) ); break;
case 32: memcpy( &context->u.s.Xmm15, val, sizeof(M128A) ); break;
case 33: memcpy( &context->u.s.Legacy[0], val, sizeof(M128A) ); break;
case 34: memcpy( &context->u.s.Legacy[1], val, sizeof(M128A) ); break;
case 35: memcpy( &context->u.s.Legacy[2], val, sizeof(M128A) ); break;
case 36: memcpy( &context->u.s.Legacy[3], val, sizeof(M128A) ); break;
case 37: memcpy( &context->u.s.Legacy[4], val, sizeof(M128A) ); break;
case 38: memcpy( &context->u.s.Legacy[5], val, sizeof(M128A) ); break;
case 39: memcpy( &context->u.s.Legacy[6], val, sizeof(M128A) ); break;
case 40: memcpy( &context->u.s.Legacy[7], val, sizeof(M128A) ); break;
}
}
static ULONG_PTR eval_expression( const unsigned char *p, CONTEXT *context,
const struct dwarf_eh_bases *bases )
{
ULONG_PTR reg, tmp, stack[64];
int sp = -1;
ULONG_PTR len = dwarf_get_uleb128(&p);
const unsigned char *end = p + len;
while (p < end)
{
unsigned char opcode = dwarf_get_u1(&p);
if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
stack[++sp] = opcode - DW_OP_lit0;
else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_reg0 );
else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_breg0 ) + dwarf_get_sleb128(&p);
else switch (opcode)
{
case DW_OP_nop: break;
case DW_OP_addr: stack[++sp] = dwarf_get_u8(&p); break;
case DW_OP_const1u: stack[++sp] = dwarf_get_u1(&p); break;
case DW_OP_const1s: stack[++sp] = (signed char)dwarf_get_u1(&p); break;
case DW_OP_const2u: stack[++sp] = dwarf_get_u2(&p); break;
case DW_OP_const2s: stack[++sp] = (short)dwarf_get_u2(&p); break;
case DW_OP_const4u: stack[++sp] = dwarf_get_u4(&p); break;
case DW_OP_const4s: stack[++sp] = (signed int)dwarf_get_u4(&p); break;
case DW_OP_const8u: stack[++sp] = dwarf_get_u8(&p); break;
case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf_get_u8(&p); break;
case DW_OP_constu: stack[++sp] = dwarf_get_uleb128(&p); break;
case DW_OP_consts: stack[++sp] = dwarf_get_sleb128(&p); break;
case DW_OP_deref: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
case DW_OP_drop: sp--; break;
case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf_get_u1(&p)]; sp++; break;
case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
case DW_OP_abs: stack[sp] = labs(stack[sp]); break;
case DW_OP_neg: stack[sp] = -stack[sp]; break;
case DW_OP_not: stack[sp] = ~stack[sp]; break;
case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
case DW_OP_plus_uconst: stack[sp] += dwarf_get_uleb128(&p); break;
case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
case DW_OP_skip: tmp = (short)dwarf_get_u2(&p); p += tmp; break;
case DW_OP_bra: tmp = (short)dwarf_get_u2(&p); if (!stack[sp--]) p += tmp; break;
case DW_OP_GNU_encoded_addr: tmp = *p++; stack[++sp] = dwarf_get_ptr( &p, tmp, bases ); break;
case DW_OP_regx: stack[++sp] = *(ULONG_PTR *)get_context_reg( context, dwarf_get_uleb128(&p) ); break;
case DW_OP_bregx:
reg = dwarf_get_uleb128(&p);
tmp = dwarf_get_sleb128(&p);
stack[++sp] = *(ULONG_PTR *)get_context_reg( context, reg ) + tmp;
break;
case DW_OP_deref_size:
switch (*p++)
{
case 1: stack[sp] = *(unsigned char *)stack[sp]; break;
case 2: stack[sp] = *(unsigned short *)stack[sp]; break;
case 4: stack[sp] = *(unsigned int *)stack[sp]; break;
case 8: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
}
break;
default:
FIXME( "unhandled opcode %02x\n", opcode );
}
}
return stack[sp];
}
/* apply the computed frame info to the actual context */
static void apply_frame_state( CONTEXT *context, struct frame_state *state,
const struct dwarf_eh_bases *bases )
{
unsigned int i;
ULONG_PTR cfa, value;
CONTEXT new_context = *context;
switch (state->cfa_rule)
{
case RULE_EXPRESSION:
cfa = *(ULONG_PTR *)eval_expression( (const unsigned char *)state->cfa_offset, context, bases );
break;
case RULE_VAL_EXPRESSION:
cfa = eval_expression( (const unsigned char *)state->cfa_offset, context, bases );
break;
default:
cfa = *(ULONG_PTR *)get_context_reg( context, state->cfa_reg ) + state->cfa_offset;
break;
}
if (!cfa) return;
for (i = 0; i < NB_FRAME_REGS; i++)
{
switch (state->rules[i])
{
case RULE_UNSET:
case RULE_UNDEFINED:
case RULE_SAME:
break;
case RULE_CFA_OFFSET:
set_context_reg( &new_context, i, (char *)cfa + state->regs[i] );
break;
case RULE_OTHER_REG:
set_context_reg( &new_context, i, get_context_reg( context, state->regs[i] ));
break;
case RULE_EXPRESSION:
value = eval_expression( (const unsigned char *)state->regs[i], context, bases );
set_context_reg( &new_context, i, (void *)value );
break;
case RULE_VAL_EXPRESSION:
value = eval_expression( (const unsigned char *)state->regs[i], context, bases );
set_context_reg( &new_context, i, &value );
break;
}
}
new_context.Rsp = cfa;
*context = new_context;
}
/***********************************************************************
* dwarf_virtual_unwind
*
* Equivalent of RtlVirtualUnwind for builtin modules.
*/
static NTSTATUS dwarf_virtual_unwind( ULONG64 ip, ULONG64 *frame,CONTEXT *context,
const struct dwarf_fde *fde, const struct dwarf_eh_bases *bases,
PEXCEPTION_ROUTINE *handler, void **handler_data )
{
const struct dwarf_cie *cie;
const unsigned char *ptr, *augmentation, *end;
ULONG_PTR len, code_end;
struct frame_info info;
struct frame_state state_stack[MAX_SAVED_STATES];
int aug_z_format = 0;
unsigned char lsda_encoding = DW_EH_PE_omit;
memset( &info, 0, sizeof(info) );
info.state_stack = state_stack;
info.ip = (ULONG_PTR)bases->func;
*handler = NULL;
cie = (const struct dwarf_cie *)((const char *)&fde->cie_offset - fde->cie_offset);
/* parse the CIE first */
if (cie->version != 1 && cie->version != 3)
{
FIXME( "unknown CIE version %u at %p\n", cie->version, cie );
return STATUS_INVALID_DISPOSITION;
}
ptr = cie->augmentation + strlen((const char *)cie->augmentation) + 1;
info.code_align = dwarf_get_uleb128( &ptr );
info.data_align = dwarf_get_sleb128( &ptr );
if (cie->version == 1)
info.retaddr_reg = *ptr++;
else
info.retaddr_reg = dwarf_get_uleb128( &ptr );
info.state.cfa_rule = RULE_CFA_OFFSET;
TRACE( "function %lx base %p cie %p len %x id %x version %x aug '%s' code_align %lu data_align %ld retaddr %s\n",
ip, bases->func, cie, cie->length, cie->id, cie->version, cie->augmentation,
info.code_align, info.data_align, dwarf_reg_names[info.retaddr_reg] );
end = NULL;
for (augmentation = cie->augmentation; *augmentation; augmentation++)
{
switch (*augmentation)
{
case 'z':
len = dwarf_get_uleb128( &ptr );
end = ptr + len;
aug_z_format = 1;
continue;
case 'L':
lsda_encoding = *ptr++;
continue;
case 'P':
{
unsigned char encoding = *ptr++;
*handler = (void *)dwarf_get_ptr( &ptr, encoding, bases );
continue;
}
case 'R':
info.fde_encoding = *ptr++;
continue;
case 'S':
info.signal_frame = 1;
continue;
}
FIXME( "unknown augmentation '%c'\n", *augmentation );
if (!end) return STATUS_INVALID_DISPOSITION; /* cannot continue */
break;
}
if (end) ptr = end;
end = (const unsigned char *)(&cie->length + 1) + cie->length;
execute_cfa_instructions( ptr, end, ip, &info, bases );
ptr = (const unsigned char *)(fde + 1);
info.ip = dwarf_get_ptr( &ptr, info.fde_encoding, bases ); /* fde code start */
code_end = info.ip + dwarf_get_ptr( &ptr, info.fde_encoding & 0x0f, bases ); /* fde code length */
if (aug_z_format) /* get length of augmentation data */
{
len = dwarf_get_uleb128( &ptr );
end = ptr + len;
}
else end = NULL;
*handler_data = (void *)dwarf_get_ptr( &ptr, lsda_encoding, bases );
if (end) ptr = end;
end = (const unsigned char *)(&fde->length + 1) + fde->length;
TRACE( "fde %p len %x personality %p lsda %p code %lx-%lx\n",
fde, fde->length, *handler, *handler_data, info.ip, code_end );
execute_cfa_instructions( ptr, end, ip, &info, bases );
*frame = context->Rsp;
apply_frame_state( context, &info.state, bases );
TRACE( "next function rip=%016lx\n", context->Rip );
TRACE( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
context->Rax, context->Rbx, context->Rcx, context->Rdx );
TRACE( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
context->Rsi, context->Rdi, context->Rbp, context->Rsp );
TRACE( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
context->R8, context->R9, context->R10, context->R11 );
TRACE( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
context->R12, context->R13, context->R14, context->R15 );
return STATUS_SUCCESS;
}
#ifdef HAVE_LIBUNWIND
/***********************************************************************
* libunwind_virtual_unwind
*
* Equivalent of RtlVirtualUnwind for builtin modules.
*/
static NTSTATUS libunwind_virtual_unwind( ULONG64 ip, ULONG64 *frame, CONTEXT *context,
PEXCEPTION_ROUTINE *handler, void **handler_data )
{
unw_context_t unw_context;
unw_cursor_t cursor;
unw_proc_info_t info;
int rc;
#ifdef __APPLE__
rc = unw_getcontext( &unw_context );
if (rc == UNW_ESUCCESS)
rc = unw_init_local( &cursor, &unw_context );
if (rc == UNW_ESUCCESS)
{
unw_set_reg( &cursor, UNW_REG_IP, context->Rip );
unw_set_reg( &cursor, UNW_REG_SP, context->Rsp );
unw_set_reg( &cursor, UNW_X86_64_RAX, context->Rax );
unw_set_reg( &cursor, UNW_X86_64_RDX, context->Rdx );
unw_set_reg( &cursor, UNW_X86_64_RCX, context->Rcx );
unw_set_reg( &cursor, UNW_X86_64_RBX, context->Rbx );
unw_set_reg( &cursor, UNW_X86_64_RSI, context->Rsi );
unw_set_reg( &cursor, UNW_X86_64_RDI, context->Rdi );
unw_set_reg( &cursor, UNW_X86_64_RBP, context->Rbp );
unw_set_reg( &cursor, UNW_X86_64_R8, context->R8 );
unw_set_reg( &cursor, UNW_X86_64_R9, context->R9 );
unw_set_reg( &cursor, UNW_X86_64_R10, context->R10 );
unw_set_reg( &cursor, UNW_X86_64_R11, context->R11 );
unw_set_reg( &cursor, UNW_X86_64_R12, context->R12 );
unw_set_reg( &cursor, UNW_X86_64_R13, context->R13 );
unw_set_reg( &cursor, UNW_X86_64_R14, context->R14 );
unw_set_reg( &cursor, UNW_X86_64_R15, context->R15 );
}
#else
RAX_sig(&unw_context) = context->Rax;
RCX_sig(&unw_context) = context->Rcx;
RDX_sig(&unw_context) = context->Rdx;
RBX_sig(&unw_context) = context->Rbx;
RSP_sig(&unw_context) = context->Rsp;
RBP_sig(&unw_context) = context->Rbp;
RSI_sig(&unw_context) = context->Rsi;
RDI_sig(&unw_context) = context->Rdi;
R8_sig(&unw_context) = context->R8;
R9_sig(&unw_context) = context->R9;
R10_sig(&unw_context) = context->R10;
R11_sig(&unw_context) = context->R11;
R12_sig(&unw_context) = context->R12;
R13_sig(&unw_context) = context->R13;
R14_sig(&unw_context) = context->R14;
R15_sig(&unw_context) = context->R15;
RIP_sig(&unw_context) = context->Rip;
CS_sig(&unw_context) = context->SegCs;
FS_sig(&unw_context) = context->SegFs;
GS_sig(&unw_context) = context->SegGs;
EFL_sig(&unw_context) = context->EFlags;
rc = unw_init_local( &cursor, &unw_context );
#endif
if (rc != UNW_ESUCCESS)
{
WARN( "setup failed: %d\n", rc );
return STATUS_INVALID_DISPOSITION;
}
*handler = NULL;
*frame = context->Rsp;
rc = unw_get_proc_info(&cursor, &info);
if (rc != UNW_ESUCCESS && rc != UNW_ENOINFO)
{
WARN( "failed to get info: %d\n", rc );
return STATUS_INVALID_DISPOSITION;
}
if (rc == UNW_ENOINFO || ip < info.start_ip || ip > info.end_ip || info.end_ip == info.start_ip + 1)
return STATUS_UNSUCCESSFUL;
TRACE( "ip %#lx function %#lx-%#lx personality %#lx lsda %#lx fde %#lx\n",
ip, (unsigned long)info.start_ip, (unsigned long)info.end_ip, (unsigned long)info.handler,
(unsigned long)info.lsda, (unsigned long)info.unwind_info );
if (!(rc = unw_step( &cursor )))
{
WARN( "last frame\n" );
return STATUS_UNSUCCESSFUL;
}
if (rc < 0)
{
WARN( "failed to unwind: %d\n", rc );
return STATUS_INVALID_DISPOSITION;
}
unw_get_reg( &cursor, UNW_REG_IP, (unw_word_t *)&context->Rip );
unw_get_reg( &cursor, UNW_REG_SP, (unw_word_t *)&context->Rsp );
unw_get_reg( &cursor, UNW_X86_64_RAX, (unw_word_t *)&context->Rax );
unw_get_reg( &cursor, UNW_X86_64_RDX, (unw_word_t *)&context->Rdx );
unw_get_reg( &cursor, UNW_X86_64_RCX, (unw_word_t *)&context->Rcx );
unw_get_reg( &cursor, UNW_X86_64_RBX, (unw_word_t *)&context->Rbx );
unw_get_reg( &cursor, UNW_X86_64_RSI, (unw_word_t *)&context->Rsi );
unw_get_reg( &cursor, UNW_X86_64_RDI, (unw_word_t *)&context->Rdi );
unw_get_reg( &cursor, UNW_X86_64_RBP, (unw_word_t *)&context->Rbp );
unw_get_reg( &cursor, UNW_X86_64_R8, (unw_word_t *)&context->R8 );
unw_get_reg( &cursor, UNW_X86_64_R9, (unw_word_t *)&context->R9 );
unw_get_reg( &cursor, UNW_X86_64_R10, (unw_word_t *)&context->R10 );
unw_get_reg( &cursor, UNW_X86_64_R11, (unw_word_t *)&context->R11 );
unw_get_reg( &cursor, UNW_X86_64_R12, (unw_word_t *)&context->R12 );
unw_get_reg( &cursor, UNW_X86_64_R13, (unw_word_t *)&context->R13 );
unw_get_reg( &cursor, UNW_X86_64_R14, (unw_word_t *)&context->R14 );
unw_get_reg( &cursor, UNW_X86_64_R15, (unw_word_t *)&context->R15 );
*handler = (void*)info.handler;
*handler_data = (void*)info.lsda;
TRACE( "next function rip=%016lx\n", context->Rip );
TRACE( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
context->Rax, context->Rbx, context->Rcx, context->Rdx );
TRACE( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
context->Rsi, context->Rdi, context->Rbp, context->Rsp );
TRACE( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
context->R8, context->R9, context->R10, context->R11 );
TRACE( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
context->R12, context->R13, context->R14, context->R15 );
return STATUS_SUCCESS;
}
#endif
/***********************************************************************
* unwind_builtin_dll
*/
NTSTATUS CDECL unwind_builtin_dll( ULONG type, DISPATCHER_CONTEXT *dispatch, CONTEXT *context )
{
struct dwarf_eh_bases bases;
const struct dwarf_fde *fde = _Unwind_Find_FDE( (void *)(context->Rip - 1), &bases );
if (fde)
return dwarf_virtual_unwind( context->Rip, &dispatch->EstablisherFrame, context, fde,
&bases, &dispatch->LanguageHandler, &dispatch->HandlerData );
#ifdef HAVE_LIBUNWIND
return libunwind_virtual_unwind( context->Rip, &dispatch->EstablisherFrame, context,
&dispatch->LanguageHandler, &dispatch->HandlerData );
#endif
return STATUS_UNSUCCESSFUL;
}
static inline void set_sigcontext( const CONTEXT *context, ucontext_t *sigcontext )
{
RAX_sig(sigcontext) = context->Rax;
RCX_sig(sigcontext) = context->Rcx;
RDX_sig(sigcontext) = context->Rdx;
RBX_sig(sigcontext) = context->Rbx;
RSP_sig(sigcontext) = context->Rsp;
RBP_sig(sigcontext) = context->Rbp;
RSI_sig(sigcontext) = context->Rsi;
RDI_sig(sigcontext) = context->Rdi;
R8_sig(sigcontext) = context->R8;
R9_sig(sigcontext) = context->R9;
R10_sig(sigcontext) = context->R10;
R11_sig(sigcontext) = context->R11;
R12_sig(sigcontext) = context->R12;
R13_sig(sigcontext) = context->R13;
R14_sig(sigcontext) = context->R14;
R15_sig(sigcontext) = context->R15;
RIP_sig(sigcontext) = context->Rip;
CS_sig(sigcontext) = context->SegCs;
FS_sig(sigcontext) = context->SegFs;
GS_sig(sigcontext) = context->SegGs;
EFL_sig(sigcontext) = context->EFlags;
#ifdef DS_sig
DS_sig(sigcontext) = context->SegDs;
#endif
#ifdef ES_sig
ES_sig(sigcontext) = context->SegEs;
#endif
#ifdef SS_sig
SS_sig(sigcontext) = context->SegSs;
#endif
}
/***********************************************************************
* init_handler
*/
static inline void init_handler( const ucontext_t *sigcontext )
{
#ifdef __linux__
if (fs32_sel) arch_prctl( ARCH_SET_FS, amd64_thread_data()->pthread_teb );
#endif
}
/***********************************************************************
* leave_handler
*/
static inline void leave_handler( const ucontext_t *sigcontext )
{
#ifdef __linux__
if (fs32_sel && !is_inside_signal_stack( (void *)RSP_sig(sigcontext )))
__asm__ volatile( "movw %0,%%fs" :: "r" (fs32_sel) );
#endif
}
/***********************************************************************
* save_context
*
* Set the register values from a sigcontext.
*/
static void save_context( struct xcontext *xcontext, const ucontext_t *sigcontext )
{
CONTEXT *context = &xcontext->c;
init_handler( sigcontext );
context->ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS;
context->Rax = RAX_sig(sigcontext);
context->Rcx = RCX_sig(sigcontext);
context->Rdx = RDX_sig(sigcontext);
context->Rbx = RBX_sig(sigcontext);
context->Rsp = RSP_sig(sigcontext);
context->Rbp = RBP_sig(sigcontext);
context->Rsi = RSI_sig(sigcontext);
context->Rdi = RDI_sig(sigcontext);
context->R8 = R8_sig(sigcontext);
context->R9 = R9_sig(sigcontext);
context->R10 = R10_sig(sigcontext);
context->R11 = R11_sig(sigcontext);
context->R12 = R12_sig(sigcontext);
context->R13 = R13_sig(sigcontext);
context->R14 = R14_sig(sigcontext);
context->R15 = R15_sig(sigcontext);
context->Rip = RIP_sig(sigcontext);
context->SegCs = CS_sig(sigcontext);
context->SegFs = FS_sig(sigcontext);
context->SegGs = GS_sig(sigcontext);
context->EFlags = EFL_sig(sigcontext);
#ifdef DS_sig
context->SegDs = DS_sig(sigcontext);
#else
__asm__("movw %%ds,%0" : "=m" (context->SegDs));
#endif
#ifdef ES_sig
context->SegEs = ES_sig(sigcontext);
#else
__asm__("movw %%es,%0" : "=m" (context->SegEs));
#endif
#ifdef SS_sig
context->SegSs = SS_sig(sigcontext);
#else
__asm__("movw %%ss,%0" : "=m" (context->SegSs));
#endif
context->Dr0 = amd64_thread_data()->dr0;
context->Dr1 = amd64_thread_data()->dr1;
context->Dr2 = amd64_thread_data()->dr2;
context->Dr3 = amd64_thread_data()->dr3;
context->Dr6 = amd64_thread_data()->dr6;
context->Dr7 = amd64_thread_data()->dr7;
if (FPU_sig(sigcontext))
{
XSTATE *xs;
context->ContextFlags |= CONTEXT_FLOATING_POINT;
context->u.FltSave = *FPU_sig(sigcontext);
context->MxCsr = context->u.FltSave.MxCsr;
if ((cpu_info.ProcessorFeatureBits & CPU_FEATURE_AVX) && (xs = XState_sig(FPU_sig(sigcontext))))
{
/* xcontext and sigcontext are both on the signal stack, so we can
* just reference sigcontext without overflowing 32 bit XState.Offset */
context_init_xstate( context, xs );
assert( xcontext->c_ex.XState.Offset == (BYTE *)xs - (BYTE *)&xcontext->c_ex );
xcontext->host_compaction_mask = xs->CompactionMask;
}
}
}
/***********************************************************************
* restore_context
*
* Build a sigcontext from the register values.
*/
static void restore_context( const struct xcontext *xcontext, ucontext_t *sigcontext )
{
const CONTEXT *context = &xcontext->c;
XSTATE *xs;
amd64_thread_data()->dr0 = context->Dr0;
amd64_thread_data()->dr1 = context->Dr1;
amd64_thread_data()->dr2 = context->Dr2;
amd64_thread_data()->dr3 = context->Dr3;
amd64_thread_data()->dr6 = context->Dr6;
amd64_thread_data()->dr7 = context->Dr7;
set_sigcontext( context, sigcontext );
if (FPU_sig(sigcontext)) *FPU_sig(sigcontext) = context->u.FltSave;
if ((cpu_info.ProcessorFeatureBits & CPU_FEATURE_AVX) && (xs = XState_sig(FPU_sig(sigcontext))))
xs->CompactionMask = xcontext->host_compaction_mask;
leave_handler( sigcontext );
}
/***********************************************************************
* signal_set_full_context
*/
NTSTATUS signal_set_full_context( CONTEXT *context )
{
NTSTATUS status = NtSetContextThread( GetCurrentThread(), context );
if (!status && (context->ContextFlags & CONTEXT_INTEGER) == CONTEXT_INTEGER)
amd64_thread_data()->syscall_frame->restore_flags |= CONTEXT_INTEGER;
return status;
}
/***********************************************************************
* get_native_context
*/
void *get_native_context( CONTEXT *context )
{
return context;
}
/***********************************************************************
* get_wow_context
*/
void *get_wow_context( CONTEXT *context )
{
if (context->SegCs != cs64_sel) return NULL;
return get_cpu_area( IMAGE_FILE_MACHINE_I386 );
}
/***********************************************************************
* NtSetContextThread (NTDLL.@)
* ZwSetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
{
NTSTATUS ret = STATUS_SUCCESS;
DWORD flags = context->ContextFlags & ~CONTEXT_AMD64;
BOOL self = (handle == GetCurrentThread());
struct syscall_frame *frame = amd64_thread_data()->syscall_frame;
if ((flags & CONTEXT_XSTATE) && (cpu_info.ProcessorFeatureBits & CPU_FEATURE_AVX))
{
CONTEXT_EX *context_ex = (CONTEXT_EX *)(context + 1);
XSTATE *xs = (XSTATE *)((char *)context_ex + context_ex->XState.Offset);
if (context_ex->XState.Length < offsetof(XSTATE, YmmContext) ||
context_ex->XState.Length > sizeof(XSTATE))
return STATUS_INVALID_PARAMETER;
if ((xs->Mask & XSTATE_MASK_GSSE) && (context_ex->XState.Length < sizeof(XSTATE)))
return STATUS_BUFFER_OVERFLOW;
}
else flags &= ~CONTEXT_XSTATE;
/* debug registers require a server call */
if (self && (flags & CONTEXT_DEBUG_REGISTERS))
self = (amd64_thread_data()->dr0 == context->Dr0 &&
amd64_thread_data()->dr1 == context->Dr1 &&
amd64_thread_data()->dr2 == context->Dr2 &&
amd64_thread_data()->dr3 == context->Dr3 &&
amd64_thread_data()->dr6 == context->Dr6 &&
amd64_thread_data()->dr7 == context->Dr7);
if (!self)
{
ret = set_thread_context( handle, context, &self, IMAGE_FILE_MACHINE_AMD64 );
if (ret || !self) return ret;
if (flags & CONTEXT_DEBUG_REGISTERS)
{
amd64_thread_data()->dr0 = context->Dr0;
amd64_thread_data()->dr1 = context->Dr1;
amd64_thread_data()->dr2 = context->Dr2;
amd64_thread_data()->dr3 = context->Dr3;
amd64_thread_data()->dr6 = context->Dr6;
amd64_thread_data()->dr7 = context->Dr7;
}
}
if (flags & CONTEXT_INTEGER)
{
frame->rax = context->Rax;
frame->rbx = context->Rbx;
frame->rcx = context->Rcx;
frame->rdx = context->Rdx;
frame->rsi = context->Rsi;
frame->rdi = context->Rdi;
frame->r8 = context->R8;
frame->r9 = context->R9;
frame->r10 = context->R10;
frame->r11 = context->R11;
frame->r12 = context->R12;
frame->r13 = context->R13;
frame->r14 = context->R14;
frame->r15 = context->R15;
}
if (flags & CONTEXT_CONTROL)
{
frame->rsp = context->Rsp;
frame->rbp = context->Rbp;
frame->rip = context->Rip;
frame->eflags = context->EFlags;
frame->cs = context->SegCs;
frame->ss = context->SegSs;
}
if (flags & CONTEXT_SEGMENTS)
{
frame->ds = context->SegDs;
frame->es = context->SegEs;
frame->fs = context->SegFs;
frame->gs = context->SegGs;
}
if (flags & CONTEXT_FLOATING_POINT)
{
frame->xsave = context->u.FltSave;
frame->xstate.Mask |= XSTATE_MASK_LEGACY;
}
if (flags & CONTEXT_XSTATE)
{
CONTEXT_EX *context_ex = (CONTEXT_EX *)(context + 1);
XSTATE *xs = (XSTATE *)((char *)context_ex + context_ex->XState.Offset);
if (xs->Mask & XSTATE_MASK_GSSE)
{
frame->xstate.Mask |= XSTATE_MASK_GSSE;
memcpy( &frame->xstate.YmmContext, &xs->YmmContext, sizeof(xs->YmmContext) );
}
else frame->xstate.Mask &= ~XSTATE_MASK_GSSE;
}
frame->restore_flags |= flags & ~CONTEXT_INTEGER;
return STATUS_SUCCESS;
}
/***********************************************************************
* NtGetContextThread (NTDLL.@)
* ZwGetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
{
struct syscall_frame *frame = amd64_thread_data()->syscall_frame;
DWORD needed_flags = context->ContextFlags & ~CONTEXT_AMD64;
BOOL self = (handle == GetCurrentThread());
/* debug registers require a server call */
if (needed_flags & CONTEXT_DEBUG_REGISTERS) self = FALSE;
if (!self)
{
NTSTATUS ret = get_thread_context( handle, context, &self, IMAGE_FILE_MACHINE_AMD64 );
if (ret || !self) return ret;
}
if (needed_flags & CONTEXT_INTEGER)
{
context->Rax = frame->rax;
context->Rbx = frame->rbx;
context->Rcx = frame->rcx;
context->Rdx = frame->rdx;
context->Rsi = frame->rsi;
context->Rdi = frame->rdi;
context->R8 = frame->r8;
context->R9 = frame->r9;
context->R10 = frame->r10;
context->R11 = frame->r11;
context->R12 = frame->r12;
context->R13 = frame->r13;
context->R14 = frame->r14;
context->R15 = frame->r15;
context->ContextFlags |= CONTEXT_INTEGER;
}
if (needed_flags & CONTEXT_CONTROL)
{
context->Rsp = frame->rsp;
context->Rbp = frame->rbp;
context->Rip = frame->rip;
context->EFlags = frame->eflags;
context->SegCs = frame->cs;
context->SegSs = frame->ss;
context->ContextFlags |= CONTEXT_CONTROL;
}
if (needed_flags & CONTEXT_SEGMENTS)
{
context->SegDs = frame->ds;
context->SegEs = frame->es;
context->SegFs = frame->fs;
context->SegGs = frame->gs;
context->ContextFlags |= CONTEXT_SEGMENTS;
}
if (needed_flags & CONTEXT_FLOATING_POINT)
{
if (!xstate_compaction_enabled ||
(frame->xstate.Mask & XSTATE_MASK_LEGACY_FLOATING_POINT))
{
memcpy( &context->u.FltSave, &frame->xsave, FIELD_OFFSET( XSAVE_FORMAT, MxCsr ));
memcpy( context->u.FltSave.FloatRegisters, frame->xsave.FloatRegisters,
sizeof( context->u.FltSave.FloatRegisters ));
}
else
{
memset( &context->u.FltSave, 0, FIELD_OFFSET( XSAVE_FORMAT, MxCsr ));
memset( context->u.FltSave.FloatRegisters, 0,
sizeof( context->u.FltSave.FloatRegisters ));
context->u.FltSave.ControlWord = 0x37f;
}
if (!xstate_compaction_enabled || (frame->xstate.Mask & XSTATE_MASK_LEGACY_SSE))
{
memcpy( context->u.FltSave.XmmRegisters, frame->xsave.XmmRegisters,
sizeof( context->u.FltSave.XmmRegisters ));
context->u.FltSave.MxCsr = frame->xsave.MxCsr;
context->u.FltSave.MxCsr_Mask = frame->xsave.MxCsr_Mask;
}
else
{
memset( context->u.FltSave.XmmRegisters, 0,
sizeof( context->u.FltSave.XmmRegisters ));
context->u.FltSave.MxCsr = 0x1f80;
context->u.FltSave.MxCsr_Mask = 0x2ffff;
}
context->MxCsr = context->u.FltSave.MxCsr;
context->ContextFlags |= CONTEXT_FLOATING_POINT;
}
if ((needed_flags & CONTEXT_XSTATE) && (cpu_info.ProcessorFeatureBits & CPU_FEATURE_AVX))
{
CONTEXT_EX *context_ex = (CONTEXT_EX *)(context + 1);
XSTATE *xstate = (XSTATE *)((char *)context_ex + context_ex->XState.Offset);
unsigned int mask;
if (context_ex->XState.Length < offsetof(XSTATE, YmmContext)
|| context_ex->XState.Length > sizeof(XSTATE))
return STATUS_INVALID_PARAMETER;
mask = (xstate_compaction_enabled ? xstate->CompactionMask : xstate->Mask) & XSTATE_MASK_GSSE;
xstate->Mask = frame->xstate.Mask & mask;
xstate->CompactionMask = xstate_compaction_enabled ? (0x8000000000000000 | mask) : 0;
memset( xstate->Reserved, 0, sizeof(xstate->Reserved) );
if (xstate->Mask)
{
if (context_ex->XState.Length < sizeof(XSTATE)) return STATUS_BUFFER_OVERFLOW;
memcpy( &xstate->YmmContext, &frame->xstate.YmmContext, sizeof(xstate->YmmContext) );
}
}
/* update the cached version of the debug registers */
if (needed_flags & CONTEXT_DEBUG_REGISTERS)
{
amd64_thread_data()->dr0 = context->Dr0;
amd64_thread_data()->dr1 = context->Dr1;
amd64_thread_data()->dr2 = context->Dr2;
amd64_thread_data()->dr3 = context->Dr3;
amd64_thread_data()->dr6 = context->Dr6;
amd64_thread_data()->dr7 = context->Dr7;
}
return STATUS_SUCCESS;
}
/***********************************************************************
* set_thread_wow64_context
*/
NTSTATUS set_thread_wow64_context( HANDLE handle, const void *ctx, ULONG size )
{
BOOL self = (handle == GetCurrentThread());
struct syscall_frame *frame = amd64_thread_data()->syscall_frame;
I386_CONTEXT *wow_frame;
const I386_CONTEXT *context = ctx;
DWORD flags = context->ContextFlags & ~CONTEXT_i386;
if (size != sizeof(I386_CONTEXT)) return STATUS_INFO_LENGTH_MISMATCH;
/* debug registers require a server call */
if (self && (flags & CONTEXT_I386_DEBUG_REGISTERS))
self = (amd64_thread_data()->dr0 == context->Dr0 &&
amd64_thread_data()->dr1 == context->Dr1 &&
amd64_thread_data()->dr2 == context->Dr2 &&
amd64_thread_data()->dr3 == context->Dr3 &&
amd64_thread_data()->dr6 == context->Dr6 &&
amd64_thread_data()->dr7 == context->Dr7);
if (!self)
{
NTSTATUS ret = set_thread_context( handle, context, &self, IMAGE_FILE_MACHINE_I386 );
if (ret || !self) return ret;
if (flags & CONTEXT_I386_DEBUG_REGISTERS)
{
amd64_thread_data()->dr0 = context->Dr0;
amd64_thread_data()->dr1 = context->Dr1;
amd64_thread_data()->dr2 = context->Dr2;
amd64_thread_data()->dr3 = context->Dr3;
amd64_thread_data()->dr6 = context->Dr6;
amd64_thread_data()->dr7 = context->Dr7;
}
if (!(flags & ~CONTEXT_I386_DEBUG_REGISTERS)) return ret;
}
if (!(wow_frame = get_cpu_area( IMAGE_FILE_MACHINE_I386 ))) return STATUS_INVALID_PARAMETER;
if (flags & CONTEXT_I386_INTEGER)
{
wow_frame->Eax = context->Eax;
wow_frame->Ebx = context->Ebx;
wow_frame->Ecx = context->Ecx;
wow_frame->Edx = context->Edx;
wow_frame->Esi = context->Esi;
wow_frame->Edi = context->Edi;
}
if (flags & CONTEXT_I386_CONTROL)
{
wow_frame->Esp = context->Esp;
wow_frame->Ebp = context->Ebp;
wow_frame->Eip = context->Eip;
wow_frame->EFlags = context->EFlags;
wow_frame->SegCs = cs32_sel;
wow_frame->SegSs = ds64_sel;
}
if (flags & CONTEXT_I386_SEGMENTS)
{
wow_frame->SegDs = ds64_sel;
wow_frame->SegEs = ds64_sel;
wow_frame->SegFs = fs32_sel;
wow_frame->SegGs = ds64_sel;
}
if (flags & CONTEXT_I386_DEBUG_REGISTERS)
{
wow_frame->Dr0 = context->Dr0;
wow_frame->Dr1 = context->Dr1;
wow_frame->Dr2 = context->Dr2;
wow_frame->Dr3 = context->Dr3;
wow_frame->Dr6 = context->Dr6;
wow_frame->Dr7 = context->Dr7;
}
if (flags & CONTEXT_I386_EXTENDED_REGISTERS)
{
memcpy( &frame->xsave, context->ExtendedRegisters, sizeof(frame->xsave) );
}
else if (flags & CONTEXT_I386_FLOATING_POINT)
{
fpu_to_fpux( &frame->xsave, &context->FloatSave );
}
if (flags & CONTEXT_I386_XSTATE)
{
CONTEXT_EX *context_ex = (CONTEXT_EX *)(context + 1);
XSTATE *xs = (XSTATE *)((char *)context_ex + context_ex->XState.Offset);
if (xs->Mask & XSTATE_MASK_GSSE)
{
frame->xstate.Mask |= XSTATE_MASK_GSSE;
memcpy( &frame->xstate.YmmContext, &xs->YmmContext, sizeof(xs->YmmContext) );
}
else frame->xstate.Mask &= ~XSTATE_MASK_GSSE;
frame->restore_flags |= CONTEXT_XSTATE;
}
return STATUS_SUCCESS;
}
/***********************************************************************
* get_thread_wow64_context
*/
NTSTATUS get_thread_wow64_context( HANDLE handle, void *ctx, ULONG size )
{
DWORD needed_flags;
struct syscall_frame *frame = amd64_thread_data()->syscall_frame;
I386_CONTEXT *wow_frame, *context = ctx;
BOOL self = (handle == GetCurrentThread());
if (size != sizeof(I386_CONTEXT)) return STATUS_INFO_LENGTH_MISMATCH;
needed_flags = context->ContextFlags & ~CONTEXT_i386;
/* debug registers require a server call */
if (needed_flags & CONTEXT_I386_DEBUG_REGISTERS) self = FALSE;
if (!self)
{
NTSTATUS ret = get_thread_context( handle, context, &self, IMAGE_FILE_MACHINE_I386 );
if (ret || !self) return ret;
/* update the cached version of the debug registers */
if (needed_flags & CONTEXT_I386_DEBUG_REGISTERS)
{
amd64_thread_data()->dr0 = context->Dr0;
amd64_thread_data()->dr1 = context->Dr1;
amd64_thread_data()->dr2 = context->Dr2;
amd64_thread_data()->dr3 = context->Dr3;
amd64_thread_data()->dr6 = context->Dr6;
amd64_thread_data()->dr7 = context->Dr7;
}
if (!(needed_flags & ~CONTEXT_I386_DEBUG_REGISTERS)) return ret;
}
if (!(wow_frame = get_cpu_area( IMAGE_FILE_MACHINE_I386 ))) return STATUS_INVALID_PARAMETER;
if (needed_flags & CONTEXT_I386_INTEGER)
{
context->Eax = wow_frame->Eax;
context->Ebx = wow_frame->Ebx;
context->Ecx = wow_frame->Ecx;
context->Edx = wow_frame->Edx;
context->Esi = wow_frame->Esi;
context->Edi = wow_frame->Edi;
context->ContextFlags |= CONTEXT_I386_INTEGER;
}
if (needed_flags & CONTEXT_I386_CONTROL)
{
context->Esp = wow_frame->Esp;
context->Ebp = wow_frame->Ebp;
context->Eip = wow_frame->Eip;
context->EFlags = wow_frame->EFlags;
context->SegCs = wow_frame->SegCs;
context->SegSs = wow_frame->SegSs;
context->ContextFlags |= CONTEXT_I386_CONTROL;
}
if (needed_flags & CONTEXT_I386_SEGMENTS)
{
context->SegDs = wow_frame->SegDs;
context->SegEs = wow_frame->SegEs;
context->SegFs = wow_frame->SegFs;
context->SegGs = wow_frame->SegGs;
context->ContextFlags |= CONTEXT_I386_SEGMENTS;
}
if (needed_flags & CONTEXT_I386_EXTENDED_REGISTERS)
{
memcpy( context->ExtendedRegisters, &frame->xsave, sizeof(context->ExtendedRegisters) );
context->ContextFlags |= CONTEXT_I386_EXTENDED_REGISTERS;
}
if (needed_flags & CONTEXT_I386_FLOATING_POINT)
{
fpux_to_fpu( &context->FloatSave, &frame->xsave );
context->ContextFlags |= CONTEXT_I386_FLOATING_POINT;
}
if ((needed_flags & CONTEXT_I386_XSTATE) && (cpu_info.ProcessorFeatureBits & CPU_FEATURE_AVX))
{
CONTEXT_EX *context_ex = (CONTEXT_EX *)(context + 1);
XSTATE *xstate = (XSTATE *)((char *)context_ex + context_ex->XState.Offset);
unsigned int mask;
if (context_ex->XState.Length < offsetof(XSTATE, YmmContext) ||
context_ex->XState.Length > sizeof(XSTATE))
return STATUS_INVALID_PARAMETER;
mask = (xstate_compaction_enabled ? xstate->CompactionMask : xstate->Mask) & XSTATE_MASK_GSSE;
xstate->Mask = frame->xstate.Mask & mask;
xstate->CompactionMask = xstate_compaction_enabled ? (0x8000000000000000 | mask) : 0;
memset( xstate->Reserved, 0, sizeof(xstate->Reserved) );
if (xstate->Mask)
{
if (context_ex->XState.Length < sizeof(XSTATE)) return STATUS_BUFFER_OVERFLOW;
memcpy( &xstate->YmmContext, &frame->xstate.YmmContext, sizeof(xstate->YmmContext) );
}
}
return STATUS_SUCCESS;
}
/***********************************************************************
* setup_raise_exception
*/
static void setup_raise_exception( ucontext_t *sigcontext, EXCEPTION_RECORD *rec, struct xcontext *xcontext )
{
void *stack_ptr = (void *)(RSP_sig(sigcontext) & ~15);
CONTEXT *context = &xcontext->c;
struct stack_layout *stack;
size_t stack_size;
NTSTATUS status;
XSTATE *src_xs;
if (rec->ExceptionCode == EXCEPTION_SINGLE_STEP)
{
/* when single stepping can't tell whether this is a hw bp or a
* single step interrupt. try to avoid as much overhead as possible
* and only do a server call if there is any hw bp enabled. */
if (!(context->EFlags & 0x100) || (context->Dr7 & 0xff))
{
/* (possible) hardware breakpoint, fetch the debug registers */
DWORD saved_flags = context->ContextFlags;
context->ContextFlags = CONTEXT_DEBUG_REGISTERS;
NtGetContextThread(GetCurrentThread(), context);
context->ContextFlags |= saved_flags; /* restore flags */
}
context->EFlags &= ~0x100; /* clear single-step flag */
}
status = send_debug_event( rec, context, TRUE );
if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
{
restore_context( xcontext, sigcontext );
return;
}
/* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context->Rip--;
stack_size = sizeof(*stack) + 0x20;
if ((src_xs = xstate_from_context( context )))
{
stack_size += (ULONG_PTR)stack_ptr - 0x20 - (((ULONG_PTR)stack_ptr - 0x20
- sizeof(XSTATE)) & ~(ULONG_PTR)63);
}
stack = virtual_setup_exception( stack_ptr, stack_size, rec );
stack->rec = *rec;
stack->context = *context;
if (src_xs)
{
XSTATE *dst_xs = (XSTATE *)stack->xstate;
assert( !((ULONG_PTR)dst_xs & 63) );
context_init_xstate( &stack->context, stack->xstate );
memset( dst_xs, 0, offsetof(XSTATE, YmmContext) );
dst_xs->CompactionMask = xstate_compaction_enabled ? 0x8000000000000004 : 0;
if (src_xs->Mask & 4)
{
dst_xs->Mask = 4;
memcpy( &dst_xs->YmmContext, &src_xs->YmmContext, sizeof(dst_xs->YmmContext) );
}
}
RIP_sig(sigcontext) = (ULONG_PTR)pKiUserExceptionDispatcher;
RSP_sig(sigcontext) = (ULONG_PTR)stack;
/* clear single-step, direction, and align check flag */
EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000);
leave_handler( sigcontext );
}
/***********************************************************************
* setup_exception
*
* Setup a proper stack frame for the raise function, and modify the
* sigcontext so that the return from the signal handler will call
* the raise function.
*/
static void setup_exception( ucontext_t *sigcontext, EXCEPTION_RECORD *rec )
{
struct xcontext context;
rec->ExceptionAddress = (void *)RIP_sig(sigcontext);
save_context( &context, sigcontext );
setup_raise_exception( sigcontext, rec, &context );
}
/***********************************************************************
* call_user_apc_dispatcher
*/
NTSTATUS call_user_apc_dispatcher( CONTEXT *context, ULONG_PTR arg1, ULONG_PTR arg2, ULONG_PTR arg3,
PNTAPCFUNC func, NTSTATUS status )
{
struct syscall_frame *frame = amd64_thread_data()->syscall_frame;
ULONG64 rsp = context ? context->Rsp : frame->rsp;
struct apc_stack_layout *stack;
rsp &= ~15;
stack = (struct apc_stack_layout *)rsp - 1;
if (context)
{
memmove( &stack->context, context, sizeof(stack->context) );
NtSetContextThread( GetCurrentThread(), &stack->context );
}
else
{
stack->context.ContextFlags = CONTEXT_FULL;
NtGetContextThread( GetCurrentThread(), &stack->context );
stack->context.Rax = status;
}
frame->rbp = stack->context.Rbp;
frame->rsp = (ULONG64)stack - 8;
frame->rip = (ULONG64)pKiUserApcDispatcher;
frame->rcx = (ULONG64)&stack->context;
frame->rdx = arg1;
frame->r8 = arg2;
frame->r9 = arg3;
stack->func = func;
frame->restore_flags |= CONTEXT_CONTROL | CONTEXT_INTEGER;
return status;
}
/***********************************************************************
* call_raise_user_exception_dispatcher
*/
void call_raise_user_exception_dispatcher(void)
{
amd64_thread_data()->syscall_frame->rip = (UINT64)pKiRaiseUserExceptionDispatcher;
}
/***********************************************************************
* call_user_exception_dispatcher
*/
NTSTATUS call_user_exception_dispatcher( EXCEPTION_RECORD *rec, CONTEXT *context )
{
struct syscall_frame *frame = amd64_thread_data()->syscall_frame;
struct stack_layout *stack;
ULONG64 rsp;
NTSTATUS status = NtSetContextThread( GetCurrentThread(), context );
if (status) return status;
rsp = (context->Rsp - 0x20) & ~15;
stack = (struct stack_layout *)rsp - 1;
if ((context->ContextFlags & CONTEXT_XSTATE) == CONTEXT_XSTATE)
{
rsp = (rsp - sizeof(XSTATE)) & ~63;
stack = (struct stack_layout *)rsp - 1;
assert( !((ULONG_PTR)stack->xstate & 63) );
context_init_xstate( &stack->context, stack->xstate );
memcpy( stack->xstate, &frame->xstate, sizeof(frame->xstate) );
}
memmove( &stack->context, context, sizeof(*context) );
stack->rec = *rec;
/* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
if (stack->rec.ExceptionCode == EXCEPTION_BREAKPOINT) stack->context.Rip--;
frame->rbp = context->Rbp;
frame->rsp = (ULONG64)stack;
frame->rip = (ULONG64)pKiUserExceptionDispatcher;
frame->restore_flags |= CONTEXT_CONTROL;
return status;
}
/***********************************************************************
* is_privileged_instr
*
* Check if the fault location is a privileged instruction.
*/
static inline DWORD is_privileged_instr( CONTEXT *context )
{
BYTE instr[16];
unsigned int i, prefix_count = 0;
unsigned int len = virtual_uninterrupted_read_memory( (BYTE *)context->Rip, instr, sizeof(instr) );
for (i = 0; i < len; i++) switch (instr[i])
{
/* instruction prefixes */
case 0x2e: /* %cs: */
case 0x36: /* %ss: */
case 0x3e: /* %ds: */
case 0x26: /* %es: */
case 0x40: /* rex */
case 0x41: /* rex */
case 0x42: /* rex */
case 0x43: /* rex */
case 0x44: /* rex */
case 0x45: /* rex */
case 0x46: /* rex */
case 0x47: /* rex */
case 0x48: /* rex */
case 0x49: /* rex */
case 0x4a: /* rex */
case 0x4b: /* rex */
case 0x4c: /* rex */
case 0x4d: /* rex */
case 0x4e: /* rex */
case 0x4f: /* rex */
case 0x64: /* %fs: */
case 0x65: /* %gs: */
case 0x66: /* opcode size */
case 0x67: /* addr size */
case 0xf0: /* lock */
case 0xf2: /* repne */
case 0xf3: /* repe */
if (++prefix_count >= 15) return EXCEPTION_ILLEGAL_INSTRUCTION;
continue;
case 0x0f: /* extended instruction */
if (i == len - 1) return 0;
switch (instr[i + 1])
{
case 0x06: /* clts */
case 0x08: /* invd */
case 0x09: /* wbinvd */
case 0x20: /* mov crX, reg */
case 0x21: /* mov drX, reg */
case 0x22: /* mov reg, crX */
case 0x23: /* mov reg drX */
return EXCEPTION_PRIV_INSTRUCTION;
}
return 0;
case 0x6c: /* insb (%dx) */
case 0x6d: /* insl (%dx) */
case 0x6e: /* outsb (%dx) */
case 0x6f: /* outsl (%dx) */
case 0xcd: /* int $xx */
case 0xe4: /* inb al,XX */
case 0xe5: /* in (e)ax,XX */
case 0xe6: /* outb XX,al */
case 0xe7: /* out XX,(e)ax */
case 0xec: /* inb (%dx),%al */
case 0xed: /* inl (%dx),%eax */
case 0xee: /* outb %al,(%dx) */
case 0xef: /* outl %eax,(%dx) */
case 0xf4: /* hlt */
case 0xfa: /* cli */
case 0xfb: /* sti */
return EXCEPTION_PRIV_INSTRUCTION;
default:
return 0;
}
return 0;
}
/***********************************************************************
* handle_interrupt
*
* Handle an interrupt.
*/
static inline BOOL handle_interrupt( ucontext_t *sigcontext, EXCEPTION_RECORD *rec, struct xcontext *xcontext )
{
CONTEXT *context = &xcontext->c;
switch (ERROR_sig(sigcontext) >> 3)
{
case 0x2c:
rec->ExceptionCode = STATUS_ASSERTION_FAILURE;
break;
case 0x2d:
switch (context->Rax)
{
case 1: /* BREAKPOINT_PRINT */
case 3: /* BREAKPOINT_LOAD_SYMBOLS */
case 4: /* BREAKPOINT_UNLOAD_SYMBOLS */
case 5: /* BREAKPOINT_COMMAND_STRING (>= Win2003) */
RIP_sig(sigcontext) += 3;
leave_handler( sigcontext );
return TRUE;
}
context->Rip += 3;
rec->ExceptionCode = EXCEPTION_BREAKPOINT;
rec->ExceptionAddress = (void *)context->Rip;
rec->NumberParameters = 1;
rec->ExceptionInformation[0] = context->Rax;
break;
default:
return FALSE;
}
setup_raise_exception( sigcontext, rec, xcontext );
return TRUE;
}
/***********************************************************************
* handle_syscall_fault
*
* Handle a page fault happening during a system call.
*/
static BOOL handle_syscall_fault( ucontext_t *sigcontext, EXCEPTION_RECORD *rec, CONTEXT *context )
{
struct syscall_frame *frame = amd64_thread_data()->syscall_frame;
DWORD i;
if (!is_inside_syscall( sigcontext )) return FALSE;
TRACE_(seh)( "code=%x flags=%x addr=%p ip=%lx tid=%04x\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
context->Rip, GetCurrentThreadId() );
for (i = 0; i < rec->NumberParameters; i++)
TRACE_(seh)( " info[%d]=%016lx\n", i, rec->ExceptionInformation[i] );
TRACE_(seh)( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
context->Rax, context->Rbx, context->Rcx, context->Rdx );
TRACE_(seh)( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
context->Rsi, context->Rdi, context->Rbp, context->Rsp );
TRACE_(seh)( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
context->R8, context->R9, context->R10, context->R11 );
TRACE_(seh)( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
context->R12, context->R13, context->R14, context->R15 );
if (ntdll_get_thread_data()->jmp_buf)
{
TRACE_(seh)( "returning to handler\n" );
RCX_sig(sigcontext) = (ULONG_PTR)ntdll_get_thread_data()->jmp_buf;
RDX_sig(sigcontext) = 1;
RIP_sig(sigcontext) = (ULONG_PTR)__wine_longjmp;
ntdll_get_thread_data()->jmp_buf = NULL;
}
else
{
TRACE_(seh)( "returning to user mode ip=%016lx ret=%08x\n", frame->rip, rec->ExceptionCode );
RCX_sig(sigcontext) = (ULONG_PTR)frame;
RDX_sig(sigcontext) = rec->ExceptionCode;
RIP_sig(sigcontext) = (ULONG_PTR)__wine_syscall_dispatcher_return;
}
return TRUE;
}
/***********************************************************************
* handle_syscall_trap
*
* Handle a trap exception during a system call.
*/
static BOOL handle_syscall_trap( ucontext_t *sigcontext )
{
extern void __wine_syscall_dispatcher_prolog_end(void);
struct syscall_frame *frame = amd64_thread_data()->syscall_frame;
/* disallow single-stepping through a syscall */
if ((void *)RIP_sig( sigcontext ) != __wine_syscall_dispatcher) return FALSE;
TRACE_(seh)( "ignoring trap in syscall rip=%p eflags=%08x\n",
(void *)RIP_sig(sigcontext), (ULONG)EFL_sig(sigcontext) );
frame->rip = *(ULONG64 *)RSP_sig( sigcontext );
frame->eflags = EFL_sig(sigcontext);
frame->restore_flags = CONTEXT_CONTROL;
RIP_sig( sigcontext ) = (ULONG64)__wine_syscall_dispatcher_prolog_end;
RCX_sig( sigcontext ) = (ULONG64)frame;
RSP_sig( sigcontext ) += sizeof(ULONG64);
EFL_sig( sigcontext ) &= ~0x100; /* clear single-step flag */
return TRUE;
}
/**********************************************************************
* segv_handler
*
* Handler for SIGSEGV and related errors.
*/
static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { 0 };
struct xcontext context;
ucontext_t *ucontext = sigcontext;
rec.ExceptionAddress = (void *)RIP_sig(ucontext);
save_context( &context, sigcontext );
switch(TRAP_sig(ucontext))
{
case TRAP_x86_OFLOW: /* Overflow exception */
rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
break;
case TRAP_x86_BOUND: /* Bound range exception */
rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
break;
case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
case TRAP_x86_STKFLT: /* Stack fault */
rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
break;
case TRAP_x86_SEGNPFLT: /* Segment not present exception */
case TRAP_x86_PROTFLT: /* General protection fault */
{
WORD err = ERROR_sig(ucontext);
if (!err && (rec.ExceptionCode = is_privileged_instr( &context.c ))) break;
if ((err & 7) == 2 && handle_interrupt( ucontext, &rec, &context )) return;
rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
rec.NumberParameters = 2;
rec.ExceptionInformation[0] = 0;
rec.ExceptionInformation[1] = 0xffffffffffffffff;
}
break;
case TRAP_x86_PAGEFLT: /* Page fault */
rec.NumberParameters = 2;
rec.ExceptionInformation[0] = (ERROR_sig(ucontext) >> 1) & 0x09;
rec.ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
rec.ExceptionCode = virtual_handle_fault( siginfo->si_addr, rec.ExceptionInformation[0],
(void *)RSP_sig(ucontext) );
if (!rec.ExceptionCode)
{
leave_handler( sigcontext );
return;
}
break;
case TRAP_x86_ALIGNFLT: /* Alignment check exception */
if (EFL_sig(ucontext) & 0x00040000)
{
EFL_sig(ucontext) &= ~0x00040000; /* reset AC flag */
leave_handler( sigcontext );
return;
}
rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
break;
default:
ERR_(seh)( "Got unexpected trap %ld\n", (ULONG_PTR)TRAP_sig(ucontext) );
/* fall through */
case TRAP_x86_NMI: /* NMI interrupt */
case TRAP_x86_DNA: /* Device not available exception */
case TRAP_x86_DOUBLEFLT: /* Double fault exception */
case TRAP_x86_TSSFLT: /* Invalid TSS exception */
case TRAP_x86_MCHK: /* Machine check exception */
case TRAP_x86_CACHEFLT: /* Cache flush exception */
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
}
if (handle_syscall_fault( sigcontext, &rec, &context.c )) return;
setup_raise_exception( sigcontext, &rec, &context );
}
/**********************************************************************
* trap_handler
*
* Handler for SIGTRAP.
*/
static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { 0 };
struct xcontext context;
ucontext_t *ucontext = sigcontext;
if (handle_syscall_trap( sigcontext )) return;
rec.ExceptionAddress = (void *)RIP_sig(ucontext);
save_context( &context, sigcontext );
switch (siginfo->si_code)
{
case TRAP_TRACE: /* Single-step exception */
case 4 /* TRAP_HWBKPT */: /* Hardware breakpoint exception */
rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
break;
case TRAP_BRKPT: /* Breakpoint exception */
#ifdef SI_KERNEL
case SI_KERNEL:
#endif
/* Check if this is actually icebp instruction */
if (((unsigned char *)RIP_sig(ucontext))[-1] == 0xF1)
{
rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
break;
}
rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */
/* fall through */
default:
rec.ExceptionCode = EXCEPTION_BREAKPOINT;
rec.NumberParameters = 1;
rec.ExceptionInformation[0] = 0;
break;
}
setup_raise_exception( sigcontext, &rec, &context );
}
/**********************************************************************
* fpe_handler
*
* Handler for SIGFPE.
*/
static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { 0 };
switch (siginfo->si_code)
{
case FPE_FLTSUB:
rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
break;
case FPE_INTDIV:
rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
break;
case FPE_INTOVF:
rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
break;
case FPE_FLTDIV:
rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
break;
case FPE_FLTOVF:
rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
break;
case FPE_FLTUND:
rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
break;
case FPE_FLTRES:
rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
break;
case FPE_FLTINV:
default:
rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
break;
}
setup_exception( sigcontext, &rec );
}
/**********************************************************************
* int_handler
*
* Handler for SIGINT.
*/
static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
HANDLE handle;
if (!p__wine_ctrl_routine) return;
if (!NtCreateThreadEx( &handle, THREAD_ALL_ACCESS, NULL, NtCurrentProcess(),
p__wine_ctrl_routine, 0 /* CTRL_C_EVENT */, 0, 0, 0, 0, NULL ))
NtClose( handle );
}
/**********************************************************************
* abrt_handler
*
* Handler for SIGABRT.
*/
static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { EXCEPTION_WINE_ASSERTION, EH_NONCONTINUABLE };
setup_exception( sigcontext, &rec );
}
/**********************************************************************
* quit_handler
*
* Handler for SIGQUIT.
*/
static void quit_handler( int signal, siginfo_t *siginfo, void *ucontext )
{
init_handler( ucontext );
abort_thread(0);
}
/**********************************************************************
* usr1_handler
*
* Handler for SIGUSR1, used to signal a thread that it got suspended.
*/
static void usr1_handler( int signal, siginfo_t *siginfo, void *ucontext )
{
struct xcontext context;
if (is_inside_syscall( ucontext ))
{
DECLSPEC_ALIGN(64) XSTATE xs;
context.c.ContextFlags = CONTEXT_FULL;
context_init_xstate( &context.c, &xs );
NtGetContextThread( GetCurrentThread(), &context.c );
wait_suspend( &context.c );
NtSetContextThread( GetCurrentThread(), &context.c );
}
else
{
save_context( &context, ucontext );
wait_suspend( &context.c );
restore_context( &context, ucontext );
}
}
/**********************************************************************
* get_thread_ldt_entry
*/
NTSTATUS get_thread_ldt_entry( HANDLE handle, void *data, ULONG len, ULONG *ret_len )
{
return STATUS_NOT_IMPLEMENTED;
}
/******************************************************************************
* NtSetLdtEntries (NTDLL.@)
* ZwSetLdtEntries (NTDLL.@)
*/
NTSTATUS WINAPI NtSetLdtEntries( ULONG sel1, LDT_ENTRY entry1, ULONG sel2, LDT_ENTRY entry2 )
{
return STATUS_NOT_IMPLEMENTED;
}
/**********************************************************************
* signal_init_threading
*/
void signal_init_threading(void)
{
__asm__( "movw %%cs,%0" : "=m" (cs64_sel) );
__asm__( "movw %%ss,%0" : "=m" (ds64_sel) );
}
/**********************************************************************
* signal_alloc_thread
*/
NTSTATUS signal_alloc_thread( TEB *teb )
{
return STATUS_SUCCESS;
}
/**********************************************************************
* signal_free_thread
*/
void signal_free_thread( TEB *teb )
{
}
#ifdef __APPLE__
/**********************************************************************
* mac_thread_gsbase
*/
static void *mac_thread_gsbase(void)
{
struct thread_identifier_info tiinfo;
unsigned int info_count = THREAD_IDENTIFIER_INFO_COUNT;
static int gsbase_offset = -1;
kern_return_t kr = thread_info(mach_thread_self(), THREAD_IDENTIFIER_INFO, (thread_info_t) &tiinfo, &info_count);
if (kr == KERN_SUCCESS) return (void*)tiinfo.thread_handle;
if (gsbase_offset < 0)
{
/* Search for the array of TLS slots within the pthread data structure.
That's what the macOS pthread implementation uses for gsbase. */
const void* const sentinel1 = (const void*)0x2bffb6b4f11228ae;
const void* const sentinel2 = (const void*)0x0845a7ff6ab76707;
int rc;
pthread_key_t key;
const void** p = (const void**)pthread_self();
int i;
gsbase_offset = 0;
if ((rc = pthread_key_create(&key, NULL))) return NULL;
pthread_setspecific(key, sentinel1);
for (i = key + 1; i < 2000; i++) /* arbitrary limit */
{
if (p[i] == sentinel1)
{
pthread_setspecific(key, sentinel2);
if (p[i] == sentinel2)
{
gsbase_offset = (i - key) * sizeof(*p);
break;
}
pthread_setspecific(key, sentinel1);
}
}
pthread_key_delete(key);
}
if (gsbase_offset) return (char*)pthread_self() + gsbase_offset;
return NULL;
}
#endif
/**********************************************************************
* signal_init_thread
*/
void signal_init_thread( TEB *teb )
{
const WORD fpu_cw = 0x27f;
#if defined __linux__
arch_prctl( ARCH_SET_GS, teb );
arch_prctl( ARCH_GET_FS, &amd64_thread_data()->pthread_teb );
if (fs32_sel) alloc_fs_sel( fs32_sel >> 3, (char *)teb + teb->WowTebOffset );
#elif defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
amd64_set_gsbase( teb );
#elif defined(__NetBSD__)
sysarch( X86_64_SET_GSBASE, &teb );
#elif defined (__APPLE__)
__asm__ volatile (".byte 0x65\n\tmovq %0,%c1"
:
: "r" (teb->Tib.Self), "n" (FIELD_OFFSET(TEB, Tib.Self)));
__asm__ volatile (".byte 0x65\n\tmovq %0,%c1"
:
: "r" (teb->ThreadLocalStoragePointer), "n" (FIELD_OFFSET(TEB, ThreadLocalStoragePointer)));
amd64_thread_data()->pthread_teb = mac_thread_gsbase();
/* alloc_tls_slot() needs to poke a value to an address relative to each
thread's gsbase. Have each thread record its gsbase pointer into its
TEB so alloc_tls_slot() can find it. */
teb->Reserved5[0] = amd64_thread_data()->pthread_teb;
#else
# error Please define setting %gs for your architecture
#endif
#ifdef __GNUC__
__asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw));
#else
FIXME_(seh)("FPU setup not implemented for this platform.\n");
#endif
}
/**********************************************************************
* signal_init_process
*/
void signal_init_process(void)
{
struct sigaction sig_act;
void *ptr, *kernel_stack = (char *)ntdll_get_thread_data()->kernel_stack + kernel_stack_size;
amd64_thread_data()->syscall_frame = (struct syscall_frame *)kernel_stack - 1;
/* sneak in a syscall dispatcher pointer at a fixed address (7ffe1000) */
ptr = (char *)user_shared_data + page_size;
anon_mmap_fixed( ptr, page_size, PROT_READ | PROT_WRITE, 0 );
*(void **)ptr = __wine_syscall_dispatcher;
if (cpu_info.ProcessorFeatureBits & CPU_FEATURE_XSAVE) __wine_syscall_flags |= SYSCALL_HAVE_XSAVE;
if (xstate_compaction_enabled) __wine_syscall_flags |= SYSCALL_HAVE_XSAVEC;
#ifdef __linux__
if (NtCurrentTeb()->WowTebOffset)
{
void *teb32 = (char *)NtCurrentTeb() + NtCurrentTeb()->WowTebOffset;
int sel;
cs32_sel = 0x23;
if ((sel = alloc_fs_sel( -1, teb32 )) != -1)
{
fs32_sel = (sel << 3) | 3;
__wine_syscall_flags |= SYSCALL_HAVE_PTHREAD_TEB;
if (getauxval( AT_HWCAP2 ) & 2) __wine_syscall_flags |= SYSCALL_HAVE_WRFSGSBASE;
}
else ERR_(seh)( "failed to allocate %%fs selector\n" );
}
#endif
sig_act.sa_mask = server_block_set;
sig_act.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
sig_act.sa_sigaction = int_handler;
if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = fpe_handler;
if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = abrt_handler;
if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = quit_handler;
if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = usr1_handler;
if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = trap_handler;
if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = segv_handler;
if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
return;
error:
perror("sigaction");
exit(1);
}
/***********************************************************************
* call_init_thunk
*/
void DECLSPEC_HIDDEN call_init_thunk( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend, TEB *teb )
{
struct amd64_thread_data *thread_data = (struct amd64_thread_data *)&teb->GdiTebBatch;
struct syscall_frame *frame = thread_data->syscall_frame;
CONTEXT *ctx, context = { 0 };
I386_CONTEXT *wow_context;
context.ContextFlags = CONTEXT_ALL;
context.Rcx = (ULONG_PTR)entry;
context.Rdx = (ULONG_PTR)arg;
context.Rsp = (ULONG_PTR)teb->Tib.StackBase - 0x28;
context.Rip = (ULONG_PTR)pRtlUserThreadStart;
context.SegCs = cs64_sel;
context.SegDs = ds64_sel;
context.SegEs = ds64_sel;
context.SegFs = fs32_sel;
context.SegGs = ds64_sel;
context.SegSs = ds64_sel;
context.EFlags = 0x200;
context.u.FltSave.ControlWord = 0x27f;
context.u.FltSave.MxCsr = context.MxCsr = 0x1f80;
if ((wow_context = get_cpu_area( IMAGE_FILE_MACHINE_I386 )))
{
wow_context->ContextFlags = CONTEXT_I386_ALL;
wow_context->Eax = (ULONG_PTR)entry;
wow_context->Ebx = (ULONG_PTR)arg;
wow_context->Esp = get_wow_teb( teb )->Tib.StackBase - 16;
wow_context->Eip = pLdrSystemDllInitBlock->pRtlUserThreadStart;
wow_context->SegCs = cs32_sel;
wow_context->SegDs = context.SegDs;
wow_context->SegEs = context.SegEs;
wow_context->SegFs = context.SegFs;
wow_context->SegGs = context.SegGs;
wow_context->SegSs = context.SegSs;
wow_context->EFlags = 0x202;
wow_context->FloatSave.ControlWord = context.u.FltSave.ControlWord;
*(XSAVE_FORMAT *)wow_context->ExtendedRegisters = context.u.FltSave;
}
if (suspend) wait_suspend( &context );
ctx = (CONTEXT *)((ULONG_PTR)context.Rsp & ~15) - 1;
*ctx = context;
ctx->ContextFlags = CONTEXT_FULL;
memset( frame, 0, sizeof(*frame) );
NtSetContextThread( GetCurrentThread(), ctx );
frame->rsp = (ULONG64)ctx - 8;
frame->rip = (ULONG64)pLdrInitializeThunk;
frame->rcx = (ULONG64)ctx;
frame->restore_flags |= CONTEXT_INTEGER;
pthread_sigmask( SIG_UNBLOCK, &server_block_set, NULL );
__wine_syscall_dispatcher_return( frame, 0 );
}
/***********************************************************************
* signal_start_thread
*/
__ASM_GLOBAL_FUNC( signal_start_thread,
"subq $56,%rsp\n\t"
__ASM_SEH(".seh_stackalloc 56\n\t")
__ASM_SEH(".seh_endprologue\n\t")
__ASM_CFI(".cfi_adjust_cfa_offset 56\n\t")
"movq %rbp,48(%rsp)\n\t"
__ASM_CFI(".cfi_rel_offset %rbp,48\n\t")
"movq %rbx,40(%rsp)\n\t"
__ASM_CFI(".cfi_rel_offset %rbx,40\n\t")
"movq %r12,32(%rsp)\n\t"
__ASM_CFI(".cfi_rel_offset %r12,32\n\t")
"movq %r13,24(%rsp)\n\t"
__ASM_CFI(".cfi_rel_offset %r13,24\n\t")
"movq %r14,16(%rsp)\n\t"
__ASM_CFI(".cfi_rel_offset %r14,16\n\t")
"movq %r15,8(%rsp)\n\t"
__ASM_CFI(".cfi_rel_offset %r15,8\n\t")
/* store exit frame */
"movq %rsp,0x320(%rcx)\n\t" /* amd64_thread_data()->exit_frame */
/* set syscall frame */
"movq 0x328(%rcx),%rax\n\t" /* amd64_thread_data()->syscall_frame */
"orq %rax,%rax\n\t"
"jnz 1f\n\t"
"leaq -0x400(%rsp),%rax\n\t" /* sizeof(struct syscall_frame) */
"andq $~63,%rax\n\t"
"movq %rax,0x328(%rcx)\n" /* amd64_thread_data()->syscall_frame */
"1:\tmovq %rax,%rsp\n\t"
"call " __ASM_NAME("call_init_thunk"))
/***********************************************************************
* signal_exit_thread
*/
__ASM_GLOBAL_FUNC( signal_exit_thread,
/* fetch exit frame */
"xorl %ecx,%ecx\n\t"
"xchgq %rcx,0x320(%rdx)\n\t" /* amd64_thread_data()->exit_frame */
"testq %rcx,%rcx\n\t"
"jnz 1f\n\t"
"jmp *%rsi\n"
/* switch to exit frame stack */
"1:\tmovq %rcx,%rsp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 56\n\t")
__ASM_CFI(".cfi_rel_offset %rbp,48\n\t")
__ASM_CFI(".cfi_rel_offset %rbx,40\n\t")
__ASM_CFI(".cfi_rel_offset %r12,32\n\t")
__ASM_CFI(".cfi_rel_offset %r13,24\n\t")
__ASM_CFI(".cfi_rel_offset %r14,16\n\t")
__ASM_CFI(".cfi_rel_offset %r15,8\n\t")
"call *%rsi" )
#endif /* __x86_64__ */
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