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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>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_MACHINE_SYSARCH_H
# include <machine/sysarch.h>
#endif
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#ifdef HAVE_SYSCALL_H
# include <syscall.h>
#else
# ifdef HAVE_SYS_SYSCALL_H
# include <sys/syscall.h>
# endif
#endif
#ifdef HAVE_SYS_SIGNAL_H
# include <sys/signal.h>
#endif
#ifdef HAVE_SYS_UCONTEXT_H
# include <sys/ucontext.h>
#endif
#ifdef HAVE_LIBUNWIND
# 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(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 ); }
#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 rsi;
ULONG64 rdi;
ULONG64 rbp;
ULONG64 rip;
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) == 0x5b0 ); /* Should match the size in call_user_exception_dispatcher(). */
struct syscall_frame
{
ULONG64 xmm[10 * 2]; /* xmm6-xmm15 */
ULONG64 mxcsr;
ULONG64 r12;
ULONG64 r13;
ULONG64 r14;
ULONG64 r15;
ULONG64 rdi;
ULONG64 rsi;
ULONG64 rbx;
ULONG64 rbp;
ULONG64 thunk_addr;
ULONG64 ret_addr;
};
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 */
};
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 );
static inline struct amd64_thread_data *amd64_thread_data(void)
{
return (struct amd64_thread_data *)ntdll_get_thread_data()->cpu_data;
}
/***********************************************************************
* Definitions for Dwarf unwind tables
*/
enum dwarf_call_frame_info
{
DW_CFA_advance_loc = 0x40,
DW_CFA_offset = 0x80,
DW_CFA_restore = 0xc0,
DW_CFA_nop = 0x00,
DW_CFA_set_loc = 0x01,
DW_CFA_advance_loc1 = 0x02,
DW_CFA_advance_loc2 = 0x03,
DW_CFA_advance_loc4 = 0x04,
DW_CFA_offset_extended = 0x05,
DW_CFA_restore_extended = 0x06,
DW_CFA_undefined = 0x07,
DW_CFA_same_value = 0x08,
DW_CFA_register = 0x09,
DW_CFA_remember_state = 0x0a,
DW_CFA_restore_state = 0x0b,
DW_CFA_def_cfa = 0x0c,
DW_CFA_def_cfa_register = 0x0d,
DW_CFA_def_cfa_offset = 0x0e,
DW_CFA_def_cfa_expression = 0x0f,
DW_CFA_expression = 0x10,
DW_CFA_offset_extended_sf = 0x11,
DW_CFA_def_cfa_sf = 0x12,
DW_CFA_def_cfa_offset_sf = 0x13,
DW_CFA_val_offset = 0x14,
DW_CFA_val_offset_sf = 0x15,
DW_CFA_val_expression = 0x16,
};
enum dwarf_operation
{
DW_OP_addr = 0x03,
DW_OP_deref = 0x06,
DW_OP_const1u = 0x08,
DW_OP_const1s = 0x09,
DW_OP_const2u = 0x0a,
DW_OP_const2s = 0x0b,
DW_OP_const4u = 0x0c,
DW_OP_const4s = 0x0d,
DW_OP_const8u = 0x0e,
DW_OP_const8s = 0x0f,
DW_OP_constu = 0x10,
DW_OP_consts = 0x11,
DW_OP_dup = 0x12,
DW_OP_drop = 0x13,
DW_OP_over = 0x14,
DW_OP_pick = 0x15,
DW_OP_swap = 0x16,
DW_OP_rot = 0x17,
DW_OP_xderef = 0x18,
DW_OP_abs = 0x19,
DW_OP_and = 0x1a,
DW_OP_div = 0x1b,
DW_OP_minus = 0x1c,
DW_OP_mod = 0x1d,
DW_OP_mul = 0x1e,
DW_OP_neg = 0x1f,
DW_OP_not = 0x20,
DW_OP_or = 0x21,
DW_OP_plus = 0x22,
DW_OP_plus_uconst = 0x23,
DW_OP_shl = 0x24,
DW_OP_shr = 0x25,
DW_OP_shra = 0x26,
DW_OP_xor = 0x27,
DW_OP_bra = 0x28,
DW_OP_eq = 0x29,
DW_OP_ge = 0x2a,
DW_OP_gt = 0x2b,
DW_OP_le = 0x2c,
DW_OP_lt = 0x2d,
DW_OP_ne = 0x2e,
DW_OP_skip = 0x2f,
DW_OP_lit0 = 0x30,
DW_OP_lit1 = 0x31,
DW_OP_lit2 = 0x32,
DW_OP_lit3 = 0x33,
DW_OP_lit4 = 0x34,
DW_OP_lit5 = 0x35,
DW_OP_lit6 = 0x36,
DW_OP_lit7 = 0x37,
DW_OP_lit8 = 0x38,
DW_OP_lit9 = 0x39,
DW_OP_lit10 = 0x3a,
DW_OP_lit11 = 0x3b,
DW_OP_lit12 = 0x3c,
DW_OP_lit13 = 0x3d,
DW_OP_lit14 = 0x3e,
DW_OP_lit15 = 0x3f,
DW_OP_lit16 = 0x40,
DW_OP_lit17 = 0x41,
DW_OP_lit18 = 0x42,
DW_OP_lit19 = 0x43,
DW_OP_lit20 = 0x44,
DW_OP_lit21 = 0x45,
DW_OP_lit22 = 0x46,
DW_OP_lit23 = 0x47,
DW_OP_lit24 = 0x48,
DW_OP_lit25 = 0x49,
DW_OP_lit26 = 0x4a,
DW_OP_lit27 = 0x4b,
DW_OP_lit28 = 0x4c,
DW_OP_lit29 = 0x4d,
DW_OP_lit30 = 0x4e,
DW_OP_lit31 = 0x4f,
DW_OP_reg0 = 0x50,
DW_OP_reg1 = 0x51,
DW_OP_reg2 = 0x52,
DW_OP_reg3 = 0x53,
DW_OP_reg4 = 0x54,
DW_OP_reg5 = 0x55,
DW_OP_reg6 = 0x56,
DW_OP_reg7 = 0x57,
DW_OP_reg8 = 0x58,
DW_OP_reg9 = 0x59,
DW_OP_reg10 = 0x5a,
DW_OP_reg11 = 0x5b,
DW_OP_reg12 = 0x5c,
DW_OP_reg13 = 0x5d,
DW_OP_reg14 = 0x5e,
DW_OP_reg15 = 0x5f,
DW_OP_reg16 = 0x60,
DW_OP_reg17 = 0x61,
DW_OP_reg18 = 0x62,
DW_OP_reg19 = 0x63,
DW_OP_reg20 = 0x64,
DW_OP_reg21 = 0x65,
DW_OP_reg22 = 0x66,
DW_OP_reg23 = 0x67,
DW_OP_reg24 = 0x68,
DW_OP_reg25 = 0x69,
DW_OP_reg26 = 0x6a,
DW_OP_reg27 = 0x6b,
DW_OP_reg28 = 0x6c,
DW_OP_reg29 = 0x6d,
DW_OP_reg30 = 0x6e,
DW_OP_reg31 = 0x6f,
DW_OP_breg0 = 0x70,
DW_OP_breg1 = 0x71,
DW_OP_breg2 = 0x72,
DW_OP_breg3 = 0x73,
DW_OP_breg4 = 0x74,
DW_OP_breg5 = 0x75,
DW_OP_breg6 = 0x76,
DW_OP_breg7 = 0x77,
DW_OP_breg8 = 0x78,
DW_OP_breg9 = 0x79,
DW_OP_breg10 = 0x7a,
DW_OP_breg11 = 0x7b,
DW_OP_breg12 = 0x7c,
DW_OP_breg13 = 0x7d,
DW_OP_breg14 = 0x7e,
DW_OP_breg15 = 0x7f,
DW_OP_breg16 = 0x80,
DW_OP_breg17 = 0x81,
DW_OP_breg18 = 0x82,
DW_OP_breg19 = 0x83,
DW_OP_breg20 = 0x84,
DW_OP_breg21 = 0x85,
DW_OP_breg22 = 0x86,
DW_OP_breg23 = 0x87,
DW_OP_breg24 = 0x88,
DW_OP_breg25 = 0x89,
DW_OP_breg26 = 0x8a,
DW_OP_breg27 = 0x8b,
DW_OP_breg28 = 0x8c,
DW_OP_breg29 = 0x8d,
DW_OP_breg30 = 0x8e,
DW_OP_breg31 = 0x8f,
DW_OP_regx = 0x90,
DW_OP_fbreg = 0x91,
DW_OP_bregx = 0x92,
DW_OP_piece = 0x93,
DW_OP_deref_size = 0x94,
DW_OP_xderef_size = 0x95,
DW_OP_nop = 0x96,
DW_OP_push_object_address = 0x97,
DW_OP_call2 = 0x98,
DW_OP_call4 = 0x99,
DW_OP_call_ref = 0x9a,
DW_OP_form_tls_address = 0x9b,
DW_OP_call_frame_cfa = 0x9c,
DW_OP_bit_piece = 0x9d,
DW_OP_lo_user = 0xe0,
DW_OP_hi_user = 0xff,
DW_OP_GNU_push_tls_address = 0xe0,
DW_OP_GNU_uninit = 0xf0,
DW_OP_GNU_encoded_addr = 0xf1,
};
#define DW_EH_PE_native 0x00
#define DW_EH_PE_leb128 0x01
#define DW_EH_PE_data2 0x02
#define DW_EH_PE_data4 0x03
#define DW_EH_PE_data8 0x04
#define DW_EH_PE_signed 0x08
#define DW_EH_PE_abs 0x00
#define DW_EH_PE_pcrel 0x10
#define DW_EH_PE_textrel 0x20
#define DW_EH_PE_datarel 0x30
#define DW_EH_PE_funcrel 0x40
#define DW_EH_PE_aligned 0x50
#define DW_EH_PE_indirect 0x80
#define DW_EH_PE_omit 0xff
struct dwarf_eh_bases
{
void *tbase;
void *dbase;
void *func;
};
struct dwarf_cie
{
unsigned int length;
int id;
unsigned char version;
unsigned char augmentation[1];
};
struct dwarf_fde
{
unsigned int length;
unsigned int cie_offset;
};
extern const struct dwarf_fde *_Unwind_Find_FDE (void *, struct dwarf_eh_bases *);
static unsigned char dwarf_get_u1( const unsigned char **p )
{
return *(*p)++;
}
static unsigned short dwarf_get_u2( const unsigned char **p )
{
unsigned int ret = (*p)[0] | ((*p)[1] << 8);
(*p) += 2;
return ret;
}
static unsigned int dwarf_get_u4( const unsigned char **p )
{
unsigned int ret = (*p)[0] | ((*p)[1] << 8) | ((*p)[2] << 16) | ((*p)[3] << 24);
(*p) += 4;
return ret;
}
static ULONG64 dwarf_get_u8( const unsigned char **p )
{
ULONG64 low = dwarf_get_u4( p );
ULONG64 high = dwarf_get_u4( p );
return low | (high << 32);
}
static ULONG_PTR dwarf_get_uleb128( const unsigned char **p )
{
ULONG_PTR ret = 0;
unsigned int shift = 0;
unsigned char byte;
do
{
byte = **p;
ret |= (ULONG_PTR)(byte & 0x7f) << shift;
shift += 7;
(*p)++;
} while (byte & 0x80);
return ret;
}
static LONG_PTR dwarf_get_sleb128( const unsigned char **p )
{
ULONG_PTR ret = 0;
unsigned int shift = 0;
unsigned char byte;
do
{
byte = **p;
ret |= (ULONG_PTR)(byte & 0x7f) << shift;
shift += 7;
(*p)++;
} while (byte & 0x80);
if ((shift < 8 * sizeof(ret)) && (byte & 0x40)) ret |= -((ULONG_PTR)1 << shift);
return ret;
}
static ULONG_PTR dwarf_get_ptr( const unsigned char **p, unsigned char encoding )
{
ULONG_PTR base;
if (encoding == DW_EH_PE_omit) return 0;
switch (encoding & 0xf0)
{
case DW_EH_PE_abs:
base = 0;
break;
case DW_EH_PE_pcrel:
base = (ULONG_PTR)*p;
break;
default:
FIXME( "unsupported encoding %02x\n", encoding );
return 0;
}
switch (encoding & 0x0f)
{
case DW_EH_PE_native:
return base + dwarf_get_u8( p );
case DW_EH_PE_leb128:
return base + dwarf_get_uleb128( p );
case DW_EH_PE_data2:
return base + dwarf_get_u2( p );
case DW_EH_PE_data4:
return base + dwarf_get_u4( p );
case DW_EH_PE_data8:
return base + dwarf_get_u8( p );
case DW_EH_PE_signed|DW_EH_PE_leb128:
return base + dwarf_get_sleb128( p );
case DW_EH_PE_signed|DW_EH_PE_data2:
return base + (signed short)dwarf_get_u2( p );
case DW_EH_PE_signed|DW_EH_PE_data4:
return base + (signed int)dwarf_get_u4( p );
case DW_EH_PE_signed|DW_EH_PE_data8:
return base + (LONG64)dwarf_get_u8( p );
default:
FIXME( "unsupported encoding %02x\n", encoding );
return 0;
}
}
enum reg_rule
{
RULE_UNSET, /* not set at all */
RULE_UNDEFINED, /* undefined value */
RULE_SAME, /* same value as previous frame */
RULE_CFA_OFFSET, /* stored at cfa offset */
RULE_OTHER_REG, /* stored in other register */
RULE_EXPRESSION, /* address specified by expression */
RULE_VAL_EXPRESSION /* value specified by expression */
};
#define NB_FRAME_REGS 41
#define MAX_SAVED_STATES 16
struct frame_state
{
ULONG_PTR cfa_offset;
unsigned char cfa_reg;
enum reg_rule cfa_rule;
enum reg_rule rules[NB_FRAME_REGS];
ULONG64 regs[NB_FRAME_REGS];
};
struct frame_info
{
ULONG_PTR ip;
ULONG_PTR code_align;
LONG_PTR data_align;
unsigned char retaddr_reg;
unsigned char fde_encoding;
unsigned char signal_frame;
unsigned char state_sp;
struct frame_state state;
struct frame_state *state_stack;
};
static const char *dwarf_reg_names[NB_FRAME_REGS] =
{
/* 0-7 */ "%rax", "%rdx", "%rcx", "%rbx", "%rsi", "%rdi", "%rbp", "%rsp",
/* 8-16 */ "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", "%rip",
/* 17-24 */ "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7",
/* 25-32 */ "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm12", "%xmm13", "%xmm14", "%xmm15",
/* 33-40 */ "%st0", "%st1", "%st2", "%st3", "%st4", "%st5", "%st6", "%st7"
};
static BOOL valid_reg( ULONG_PTR reg )
{
if (reg >= NB_FRAME_REGS) FIXME( "unsupported reg %lx\n", reg );
return (reg < NB_FRAME_REGS);
}
static void execute_cfa_instructions( const unsigned char *ptr, const unsigned char *end,
ULONG_PTR last_ip, struct frame_info *info )
{
while (ptr < end && info->ip < last_ip + info->signal_frame)
{
enum dwarf_call_frame_info op = *ptr++;
if (op & 0xc0)
{
switch (op & 0xc0)
{
case DW_CFA_advance_loc:
{
ULONG_PTR offset = (op & 0x3f) * info->code_align;
TRACE( "%lx: DW_CFA_advance_loc %lu\n", info->ip, offset );
info->ip += offset;
break;
}
case DW_CFA_offset:
{
ULONG_PTR reg = op & 0x3f;
LONG_PTR offset = dwarf_get_uleb128( &ptr ) * info->data_align;
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_offset %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
info->state.regs[reg] = offset;
info->state.rules[reg] = RULE_CFA_OFFSET;
break;
}
case DW_CFA_restore:
{
ULONG_PTR reg = op & 0x3f;
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_restore %s\n", info->ip, dwarf_reg_names[reg] );
info->state.rules[reg] = RULE_UNSET;
break;
}
}
}
else switch (op)
{
case DW_CFA_nop:
break;
case DW_CFA_set_loc:
{
ULONG_PTR loc = dwarf_get_ptr( &ptr, info->fde_encoding );
TRACE( "%lx: DW_CFA_set_loc %lx\n", info->ip, loc );
info->ip = loc;
break;
}
case DW_CFA_advance_loc1:
{
ULONG_PTR offset = *ptr++ * info->code_align;
TRACE( "%lx: DW_CFA_advance_loc1 %lu\n", info->ip, offset );
info->ip += offset;
break;
}
case DW_CFA_advance_loc2:
{
ULONG_PTR offset = dwarf_get_u2( &ptr ) * info->code_align;
TRACE( "%lx: DW_CFA_advance_loc2 %lu\n", info->ip, offset );
info->ip += offset;
break;
}
case DW_CFA_advance_loc4:
{
ULONG_PTR offset = dwarf_get_u4( &ptr ) * info->code_align;
TRACE( "%lx: DW_CFA_advance_loc4 %lu\n", info->ip, offset );
info->ip += offset;
break;
}
case DW_CFA_offset_extended:
case DW_CFA_offset_extended_sf:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
LONG_PTR offset = (op == DW_CFA_offset_extended) ? dwarf_get_uleb128( &ptr ) * info->data_align
: dwarf_get_sleb128( &ptr ) * info->data_align;
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_offset_extended %s, %ld\n", info->ip, dwarf_reg_names[reg], offset );
info->state.regs[reg] = offset;
info->state.rules[reg] = RULE_CFA_OFFSET;
break;
}
case DW_CFA_restore_extended:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_restore_extended %s\n", info->ip, dwarf_reg_names[reg] );
info->state.rules[reg] = RULE_UNSET;
break;
}
case DW_CFA_undefined:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_undefined %s\n", info->ip, dwarf_reg_names[reg] );
info->state.rules[reg] = RULE_UNDEFINED;
break;
}
case DW_CFA_same_value:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_same_value %s\n", info->ip, dwarf_reg_names[reg] );
info->state.regs[reg] = reg;
info->state.rules[reg] = RULE_SAME;
break;
}
case DW_CFA_register:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
ULONG_PTR reg2 = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg ) || !valid_reg( reg2 )) break;
TRACE( "%lx: DW_CFA_register %s == %s\n", info->ip, dwarf_reg_names[reg], dwarf_reg_names[reg2] );
info->state.regs[reg] = reg2;
info->state.rules[reg] = RULE_OTHER_REG;
break;
}
case DW_CFA_remember_state:
TRACE( "%lx: DW_CFA_remember_state\n", info->ip );
if (info->state_sp >= MAX_SAVED_STATES)
FIXME( "%lx: DW_CFA_remember_state too many nested saves\n", info->ip );
else
info->state_stack[info->state_sp++] = info->state;
break;
case DW_CFA_restore_state:
TRACE( "%lx: DW_CFA_restore_state\n", info->ip );
if (!info->state_sp)
FIXME( "%lx: DW_CFA_restore_state without corresponding save\n", info->ip );
else
info->state = info->state_stack[--info->state_sp];
break;
case DW_CFA_def_cfa:
case DW_CFA_def_cfa_sf:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
ULONG_PTR offset = (op == DW_CFA_def_cfa) ? dwarf_get_uleb128( &ptr )
: dwarf_get_sleb128( &ptr ) * info->data_align;
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_def_cfa %s, %lu\n", info->ip, dwarf_reg_names[reg], offset );
info->state.cfa_reg = reg;
info->state.cfa_offset = offset;
info->state.cfa_rule = RULE_CFA_OFFSET;
break;
}
case DW_CFA_def_cfa_register:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_def_cfa_register %s\n", info->ip, dwarf_reg_names[reg] );
info->state.cfa_reg = reg;
info->state.cfa_rule = RULE_CFA_OFFSET;
break;
}
case DW_CFA_def_cfa_offset:
case DW_CFA_def_cfa_offset_sf:
{
ULONG_PTR offset = (op == DW_CFA_def_cfa_offset) ? dwarf_get_uleb128( &ptr )
: dwarf_get_sleb128( &ptr ) * info->data_align;
TRACE( "%lx: DW_CFA_def_cfa_offset %lu\n", info->ip, offset );
info->state.cfa_offset = offset;
info->state.cfa_rule = RULE_CFA_OFFSET;
break;
}
case DW_CFA_def_cfa_expression:
{
ULONG_PTR expr = (ULONG_PTR)ptr;
ULONG_PTR len = dwarf_get_uleb128( &ptr );
TRACE( "%lx: DW_CFA_def_cfa_expression %lx-%lx\n", info->ip, expr, expr+len );
info->state.cfa_offset = expr;
info->state.cfa_rule = RULE_VAL_EXPRESSION;
ptr += len;
break;
}
case DW_CFA_expression:
case DW_CFA_val_expression:
{
ULONG_PTR reg = dwarf_get_uleb128( &ptr );
ULONG_PTR expr = (ULONG_PTR)ptr;
ULONG_PTR len = dwarf_get_uleb128( &ptr );
if (!valid_reg( reg )) break;
TRACE( "%lx: DW_CFA_%sexpression %s %lx-%lx\n",
info->ip, (op == DW_CFA_expression) ? "" : "val_", dwarf_reg_names[reg], expr, expr+len );
info->state.regs[reg] = expr;
info->state.rules[reg] = (op == DW_CFA_expression) ? RULE_EXPRESSION : RULE_VAL_EXPRESSION;
ptr += len;
break;
}
default:
FIXME( "%lx: unknown CFA opcode %02x\n", info->ip, op );
break;
}
}
}
/* retrieve a context register from its dwarf number */
static void *get_context_reg( CONTEXT *context, ULONG_PTR dw_reg )
{
switch (dw_reg)
{
case 0: return &context->Rax;
case 1: return &context->Rdx;
case 2: return &context->Rcx;
case 3: return &context->Rbx;
case 4: return &context->Rsi;
case 5: return &context->Rdi;
case 6: return &context->Rbp;
case 7: return &context->Rsp;
case 8: return &context->R8;
case 9: return &context->R9;
case 10: return &context->R10;
case 11: return &context->R11;
case 12: return &context->R12;
case 13: return &context->R13;
case 14: return &context->R14;
case 15: return &context->R15;
case 16: return &context->Rip;
case 17: return &context->u.s.Xmm0;
case 18: return &context->u.s.Xmm1;
case 19: return &context->u.s.Xmm2;
case 20: return &context->u.s.Xmm3;
case 21: return &context->u.s.Xmm4;
case 22: return &context->u.s.Xmm5;
case 23: return &context->u.s.Xmm6;
case 24: return &context->u.s.Xmm7;
case 25: return &context->u.s.Xmm8;
case 26: return &context->u.s.Xmm9;
case 27: return &context->u.s.Xmm10;
case 28: return &context->u.s.Xmm11;
case 29: return &context->u.s.Xmm12;
case 30: return &context->u.s.Xmm13;
case 31: return &context->u.s.Xmm14;
case 32: return &context->u.s.Xmm15;
case 33: return &context->u.s.Legacy[0];
case 34: return &context->u.s.Legacy[1];
case 35: return &context->u.s.Legacy[2];
case 36: return &context->u.s.Legacy[3];
case 37: return &context->u.s.Legacy[4];
case 38: return &context->u.s.Legacy[5];
case 39: return &context->u.s.Legacy[6];
case 40: return &context->u.s.Legacy[7];
default: return NULL;
}
}
/* set a context register from its dwarf number */
static void set_context_reg( CONTEXT *context, ULONG_PTR dw_reg, void *val )
{
switch (dw_reg)
{
case 0: context->Rax = *(ULONG64 *)val; break;
case 1: context->Rdx = *(ULONG64 *)val; break;
case 2: context->Rcx = *(ULONG64 *)val; break;
case 3: context->Rbx = *(ULONG64 *)val; break;
case 4: context->Rsi = *(ULONG64 *)val; break;
case 5: context->Rdi = *(ULONG64 *)val; break;
case 6: context->Rbp = *(ULONG64 *)val; break;
case 7: context->Rsp = *(ULONG64 *)val; break;
case 8: context->R8 = *(ULONG64 *)val; break;
case 9: context->R9 = *(ULONG64 *)val; break;
case 10: context->R10 = *(ULONG64 *)val; break;
case 11: context->R11 = *(ULONG64 *)val; break;
case 12: context->R12 = *(ULONG64 *)val; break;
case 13: context->R13 = *(ULONG64 *)val; break;
case 14: context->R14 = *(ULONG64 *)val; break;
case 15: context->R15 = *(ULONG64 *)val; break;
case 16: context->Rip = *(ULONG64 *)val; break;
case 17: memcpy( &context->u.s.Xmm0, val, sizeof(M128A) ); break;
case 18: memcpy( &context->u.s.Xmm1, val, sizeof(M128A) ); break;
case 19: memcpy( &context->u.s.Xmm2, val, sizeof(M128A) ); break;
case 20: memcpy( &context->u.s.Xmm3, val, sizeof(M128A) ); break;
case 21: memcpy( &context->u.s.Xmm4, val, sizeof(M128A) ); break;
case 22: memcpy( &context->u.s.Xmm5, val, sizeof(M128A) ); break;
case 23: memcpy( &context->u.s.Xmm6, val, sizeof(M128A) ); break;
case 24: memcpy( &context->u.s.Xmm7, val, sizeof(M128A) ); break;
case 25: memcpy( &context->u.s.Xmm8, val, sizeof(M128A) ); break;
case 26: memcpy( &context->u.s.Xmm9, val, sizeof(M128A) ); break;
case 27: memcpy( &context->u.s.Xmm10, val, sizeof(M128A) ); break;
case 28: memcpy( &context->u.s.Xmm11, val, sizeof(M128A) ); break;
case 29: memcpy( &context->u.s.Xmm12, val, sizeof(M128A) ); break;
case 30: memcpy( &context->u.s.Xmm13, val, sizeof(M128A) ); break;
case 31: memcpy( &context->u.s.Xmm14, val, sizeof(M128A) ); break;
case 32: memcpy( &context->u.s.Xmm15, val, sizeof(M128A) ); break;
case 33: memcpy( &context->u.s.Legacy[0], val, sizeof(M128A) ); break;
case 34: memcpy( &context->u.s.Legacy[1], val, sizeof(M128A) ); break;
case 35: memcpy( &context->u.s.Legacy[2], val, sizeof(M128A) ); break;
case 36: memcpy( &context->u.s.Legacy[3], val, sizeof(M128A) ); break;
case 37: memcpy( &context->u.s.Legacy[4], val, sizeof(M128A) ); break;
case 38: memcpy( &context->u.s.Legacy[5], val, sizeof(M128A) ); break;
case 39: memcpy( &context->u.s.Legacy[6], val, sizeof(M128A) ); break;
case 40: memcpy( &context->u.s.Legacy[7], val, sizeof(M128A) ); break;
}
}
static ULONG_PTR eval_expression( const unsigned char *p, CONTEXT *context )
{
ULONG_PTR reg, tmp, stack[64];
int sp = -1;
ULONG_PTR len = dwarf_get_uleb128(&p);
const unsigned char *end = p + len;
while (p < end)
{
unsigned char opcode = dwarf_get_u1(&p);
if (opcode >= DW_OP_lit0 && opcode <= DW_OP_lit31)
stack[++sp] = opcode - DW_OP_lit0;
else if (opcode >= DW_OP_reg0 && opcode <= DW_OP_reg31)
stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_reg0 );
else if (opcode >= DW_OP_breg0 && opcode <= DW_OP_breg31)
stack[++sp] = *(ULONG_PTR *)get_context_reg( context, opcode - DW_OP_breg0 ) + dwarf_get_sleb128(&p);
else switch (opcode)
{
case DW_OP_nop: break;
case DW_OP_addr: stack[++sp] = dwarf_get_u8(&p); break;
case DW_OP_const1u: stack[++sp] = dwarf_get_u1(&p); break;
case DW_OP_const1s: stack[++sp] = (signed char)dwarf_get_u1(&p); break;
case DW_OP_const2u: stack[++sp] = dwarf_get_u2(&p); break;
case DW_OP_const2s: stack[++sp] = (short)dwarf_get_u2(&p); break;
case DW_OP_const4u: stack[++sp] = dwarf_get_u4(&p); break;
case DW_OP_const4s: stack[++sp] = (signed int)dwarf_get_u4(&p); break;
case DW_OP_const8u: stack[++sp] = dwarf_get_u8(&p); break;
case DW_OP_const8s: stack[++sp] = (LONG_PTR)dwarf_get_u8(&p); break;
case DW_OP_constu: stack[++sp] = dwarf_get_uleb128(&p); break;
case DW_OP_consts: stack[++sp] = dwarf_get_sleb128(&p); break;
case DW_OP_deref: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
case DW_OP_dup: stack[sp + 1] = stack[sp]; sp++; break;
case DW_OP_drop: sp--; break;
case DW_OP_over: stack[sp + 1] = stack[sp - 1]; sp++; break;
case DW_OP_pick: stack[sp + 1] = stack[sp - dwarf_get_u1(&p)]; sp++; break;
case DW_OP_swap: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = tmp; break;
case DW_OP_rot: tmp = stack[sp]; stack[sp] = stack[sp-1]; stack[sp-1] = stack[sp-2]; stack[sp-2] = tmp; break;
case DW_OP_abs: stack[sp] = labs(stack[sp]); break;
case DW_OP_neg: stack[sp] = -stack[sp]; break;
case DW_OP_not: stack[sp] = ~stack[sp]; break;
case DW_OP_and: stack[sp-1] &= stack[sp]; sp--; break;
case DW_OP_or: stack[sp-1] |= stack[sp]; sp--; break;
case DW_OP_minus: stack[sp-1] -= stack[sp]; sp--; break;
case DW_OP_mul: stack[sp-1] *= stack[sp]; sp--; break;
case DW_OP_plus: stack[sp-1] += stack[sp]; sp--; break;
case DW_OP_xor: stack[sp-1] ^= stack[sp]; sp--; break;
case DW_OP_shl: stack[sp-1] <<= stack[sp]; sp--; break;
case DW_OP_shr: stack[sp-1] >>= stack[sp]; sp--; break;
case DW_OP_plus_uconst: stack[sp] += dwarf_get_uleb128(&p); break;
case DW_OP_shra: stack[sp-1] = (LONG_PTR)stack[sp-1] / (1 << stack[sp]); sp--; break;
case DW_OP_div: stack[sp-1] = (LONG_PTR)stack[sp-1] / (LONG_PTR)stack[sp]; sp--; break;
case DW_OP_mod: stack[sp-1] = (LONG_PTR)stack[sp-1] % (LONG_PTR)stack[sp]; sp--; break;
case DW_OP_ge: stack[sp-1] = ((LONG_PTR)stack[sp-1] >= (LONG_PTR)stack[sp]); sp--; break;
case DW_OP_gt: stack[sp-1] = ((LONG_PTR)stack[sp-1] > (LONG_PTR)stack[sp]); sp--; break;
case DW_OP_le: stack[sp-1] = ((LONG_PTR)stack[sp-1] <= (LONG_PTR)stack[sp]); sp--; break;
case DW_OP_lt: stack[sp-1] = ((LONG_PTR)stack[sp-1] < (LONG_PTR)stack[sp]); sp--; break;
case DW_OP_eq: stack[sp-1] = (stack[sp-1] == stack[sp]); sp--; break;
case DW_OP_ne: stack[sp-1] = (stack[sp-1] != stack[sp]); sp--; break;
case DW_OP_skip: tmp = (short)dwarf_get_u2(&p); p += tmp; break;
case DW_OP_bra: tmp = (short)dwarf_get_u2(&p); if (!stack[sp--]) p += tmp; break;
case DW_OP_GNU_encoded_addr: tmp = *p++; stack[++sp] = dwarf_get_ptr( &p, tmp ); break;
case DW_OP_regx: stack[++sp] = *(ULONG_PTR *)get_context_reg( context, dwarf_get_uleb128(&p) ); break;
case DW_OP_bregx:
reg = dwarf_get_uleb128(&p);
tmp = dwarf_get_sleb128(&p);
stack[++sp] = *(ULONG_PTR *)get_context_reg( context, reg ) + tmp;
break;
case DW_OP_deref_size:
switch (*p++)
{
case 1: stack[sp] = *(unsigned char *)stack[sp]; break;
case 2: stack[sp] = *(unsigned short *)stack[sp]; break;
case 4: stack[sp] = *(unsigned int *)stack[sp]; break;
case 8: stack[sp] = *(ULONG_PTR *)stack[sp]; break;
}
break;
default:
FIXME( "unhandled opcode %02x\n", opcode );
}
}
return stack[sp];
}
/* apply the computed frame info to the actual context */
static void apply_frame_state( CONTEXT *context, struct frame_state *state )
{
unsigned int i;
ULONG_PTR cfa, value;
CONTEXT new_context = *context;
switch (state->cfa_rule)
{
case RULE_EXPRESSION:
cfa = *(ULONG_PTR *)eval_expression( (const unsigned char *)state->cfa_offset, context );
break;
case RULE_VAL_EXPRESSION:
cfa = eval_expression( (const unsigned char *)state->cfa_offset, context );
break;
default:
cfa = *(ULONG_PTR *)get_context_reg( context, state->cfa_reg ) + state->cfa_offset;
break;
}
if (!cfa) return;
for (i = 0; i < NB_FRAME_REGS; i++)
{
switch (state->rules[i])
{
case RULE_UNSET:
case RULE_UNDEFINED:
case RULE_SAME:
break;
case RULE_CFA_OFFSET:
set_context_reg( &new_context, i, (char *)cfa + state->regs[i] );
break;
case RULE_OTHER_REG:
set_context_reg( &new_context, i, get_context_reg( context, state->regs[i] ));
break;
case RULE_EXPRESSION:
value = eval_expression( (const unsigned char *)state->regs[i], context );
set_context_reg( &new_context, i, (void *)value );
break;
case RULE_VAL_EXPRESSION:
value = eval_expression( (const unsigned char *)state->regs[i], context );
set_context_reg( &new_context, i, &value );
break;
}
}
new_context.Rsp = cfa;
*context = new_context;
}
/***********************************************************************
* dwarf_virtual_unwind
*
* Equivalent of RtlVirtualUnwind for builtin modules.
*/
static NTSTATUS dwarf_virtual_unwind( ULONG64 ip, ULONG64 *frame,CONTEXT *context,
const struct dwarf_fde *fde, const struct dwarf_eh_bases *bases,
PEXCEPTION_ROUTINE *handler, void **handler_data )
{
const struct dwarf_cie *cie;
const unsigned char *ptr, *augmentation, *end;
ULONG_PTR len, code_end;
struct frame_info info;
struct frame_state state_stack[MAX_SAVED_STATES];
int aug_z_format = 0;
unsigned char lsda_encoding = DW_EH_PE_omit;
memset( &info, 0, sizeof(info) );
info.state_stack = state_stack;
info.ip = (ULONG_PTR)bases->func;
*handler = NULL;
cie = (const struct dwarf_cie *)((const char *)&fde->cie_offset - fde->cie_offset);
/* parse the CIE first */
if (cie->version != 1 && cie->version != 3)
{
FIXME( "unknown CIE version %u at %p\n", cie->version, cie );
return STATUS_INVALID_DISPOSITION;
}
ptr = cie->augmentation + strlen((const char *)cie->augmentation) + 1;
info.code_align = dwarf_get_uleb128( &ptr );
info.data_align = dwarf_get_sleb128( &ptr );
if (cie->version == 1)
info.retaddr_reg = *ptr++;
else
info.retaddr_reg = dwarf_get_uleb128( &ptr );
info.state.cfa_rule = RULE_CFA_OFFSET;
TRACE( "function %lx base %p cie %p len %x id %x version %x aug '%s' code_align %lu data_align %ld retaddr %s\n",
ip, bases->func, cie, cie->length, cie->id, cie->version, cie->augmentation,
info.code_align, info.data_align, dwarf_reg_names[info.retaddr_reg] );
end = NULL;
for (augmentation = cie->augmentation; *augmentation; augmentation++)
{
switch (*augmentation)
{
case 'z':
len = dwarf_get_uleb128( &ptr );
end = ptr + len;
aug_z_format = 1;
continue;
case 'L':
lsda_encoding = *ptr++;
continue;
case 'P':
{
unsigned char encoding = *ptr++;
*handler = (void *)dwarf_get_ptr( &ptr, encoding );
continue;
}
case 'R':
info.fde_encoding = *ptr++;
continue;
case 'S':
info.signal_frame = 1;
continue;
}
FIXME( "unknown augmentation '%c'\n", *augmentation );
if (!end) return STATUS_INVALID_DISPOSITION; /* cannot continue */
break;
}
if (end) ptr = end;
end = (const unsigned char *)(&cie->length + 1) + cie->length;
execute_cfa_instructions( ptr, end, ip, &info );
ptr = (const unsigned char *)(fde + 1);
info.ip = dwarf_get_ptr( &ptr, info.fde_encoding ); /* fde code start */
code_end = info.ip + dwarf_get_ptr( &ptr, info.fde_encoding & 0x0f ); /* fde code length */
if (aug_z_format) /* get length of augmentation data */
{
len = dwarf_get_uleb128( &ptr );
end = ptr + len;
}
else end = NULL;
*handler_data = (void *)dwarf_get_ptr( &ptr, lsda_encoding );
if (end) ptr = end;
end = (const unsigned char *)(&fde->length + 1) + fde->length;
TRACE( "fde %p len %x personality %p lsda %p code %lx-%lx\n",
fde, fde->length, *handler, *handler_data, info.ip, code_end );
execute_cfa_instructions( ptr, end, ip, &info );
*frame = context->Rsp;
apply_frame_state( context, &info.state );
TRACE( "next function rip=%016lx\n", context->Rip );
TRACE( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
context->Rax, context->Rbx, context->Rcx, context->Rdx );
TRACE( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
context->Rsi, context->Rdi, context->Rbp, context->Rsp );
TRACE( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
context->R8, context->R9, context->R10, context->R11 );
TRACE( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
context->R12, context->R13, context->R14, context->R15 );
return STATUS_SUCCESS;
}
#ifdef HAVE_LIBUNWIND
/***********************************************************************
* libunwind_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
}
/***********************************************************************
* save_context
*
* Set the register values from a sigcontext.
*/
static void save_context( struct xcontext *xcontext, const ucontext_t *sigcontext )
{
CONTEXT *context = &xcontext->c;
context->ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS;
context->Rax = RAX_sig(sigcontext);
context->Rcx = RCX_sig(sigcontext);
context->Rdx = RDX_sig(sigcontext);
context->Rbx = RBX_sig(sigcontext);
context->Rsp = RSP_sig(sigcontext);
context->Rbp = RBP_sig(sigcontext);
context->Rsi = RSI_sig(sigcontext);
context->Rdi = RDI_sig(sigcontext);
context->R8 = R8_sig(sigcontext);
context->R9 = R9_sig(sigcontext);
context->R10 = R10_sig(sigcontext);
context->R11 = R11_sig(sigcontext);
context->R12 = R12_sig(sigcontext);
context->R13 = R13_sig(sigcontext);
context->R14 = R14_sig(sigcontext);
context->R15 = R15_sig(sigcontext);
context->Rip = RIP_sig(sigcontext);
context->SegCs = CS_sig(sigcontext);
context->SegFs = FS_sig(sigcontext);
context->SegGs = GS_sig(sigcontext);
context->EFlags = EFL_sig(sigcontext);
#ifdef DS_sig
context->SegDs = DS_sig(sigcontext);
#else
__asm__("movw %%ds,%0" : "=m" (context->SegDs));
#endif
#ifdef ES_sig
context->SegEs = ES_sig(sigcontext);
#else
__asm__("movw %%es,%0" : "=m" (context->SegEs));
#endif
#ifdef SS_sig
context->SegSs = SS_sig(sigcontext);
#else
__asm__("movw %%ss,%0" : "=m" (context->SegSs));
#endif
context->Dr0 = amd64_thread_data()->dr0;
context->Dr1 = amd64_thread_data()->dr1;
context->Dr2 = amd64_thread_data()->dr2;
context->Dr3 = amd64_thread_data()->dr3;
context->Dr6 = amd64_thread_data()->dr6;
context->Dr7 = amd64_thread_data()->dr7;
if (FPU_sig(sigcontext))
{
context->ContextFlags |= CONTEXT_FLOATING_POINT;
context->u.FltSave = *FPU_sig(sigcontext);
context->MxCsr = context->u.FltSave.MxCsr;
xcontext->xstate = XState_sig(FPU_sig(sigcontext));
}
else
{
xcontext->xstate = NULL;
}
}
/***********************************************************************
* save_xstate
*
* Save the XState context
*/
static inline NTSTATUS save_xstate( CONTEXT *context )
{
CONTEXT_EX *context_ex = (CONTEXT_EX *)(context + 1);
DECLSPEC_ALIGN(64) struct
{
XSAVE_FORMAT xsave;
XSTATE xstate;
}
xsave_area;
XSTATE *xs;
if (!(user_shared_data->XState.EnabledFeatures && (xs = xstate_from_context( context ))))
return STATUS_SUCCESS;
if (context_ex->XState.Length < offsetof(XSTATE, YmmContext)
|| context_ex->XState.Length > sizeof(XSTATE))
return STATUS_INVALID_PARAMETER;
if (user_shared_data->XState.CompactionEnabled)
{
/* xsavec doesn't use anything from the save area. */
__asm__ volatile( "xsavec %0" : "=m"(xsave_area)
: "a" ((unsigned int)(xs->CompactionMask & (1 << XSTATE_AVX))), "d" (0) );
}
else
{
/* xsave preserves those bits in the mask which are not in EDX:EAX, so zero it. */
xsave_area.xstate.Mask = xsave_area.xstate.CompactionMask = 0;
__asm__ volatile( "xsave %0" : "=m"(xsave_area)
: "a" ((unsigned int)(xs->Mask & (1 << XSTATE_AVX))), "d" (0) );
}
memcpy(xs, &xsave_area.xstate, offsetof(XSTATE, YmmContext));
if (xs->Mask & (1 << XSTATE_AVX))
{
if (context_ex->XState.Length < sizeof(XSTATE))
return STATUS_BUFFER_OVERFLOW;
memcpy(&xs->YmmContext, &xsave_area.xstate.YmmContext, sizeof(xs->YmmContext));
}
return STATUS_SUCCESS;
}
/***********************************************************************
* 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;
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;
}
/***********************************************************************
* set_full_cpu_context
*
* Set the new CPU context.
*/
extern void set_full_cpu_context( const CONTEXT *context );
__ASM_GLOBAL_FUNC( set_full_cpu_context,
"subq $40,%rsp\n\t"
__ASM_SEH(".seh_stackalloc 0x40\n\t")
__ASM_SEH(".seh_endprologue\n\t")
__ASM_CFI(".cfi_adjust_cfa_offset 40\n\t")
"movq %gs:0x30,%rdx\n\t"
"movw 0x38(%rdi),%ax\n\t" /* context->SegCs */
"movq %rax,8(%rsp)\n\t"
"movw 0x42(%rdi),%ax\n\t" /* context->SegSs */
"movq %rax,32(%rsp)\n\t"
"movq 0x44(%rdi),%rax\n\t" /* context->Eflags */
"movq %rax,16(%rsp)\n\t"
"movq $0,0x328(%rdx)\n\t" /* amd64_thread_data()->syscall_frame */
"movq 0x80(%rdi),%rcx\n\t" /* context->Rcx */
"movq 0x88(%rdi),%rdx\n\t" /* context->Rdx */
"movq 0x90(%rdi),%rbx\n\t" /* context->Rbx */
"movq 0x98(%rdi),%rax\n\t" /* context->Rsp */
"movq %rax,24(%rsp)\n\t"
"movq 0xa0(%rdi),%rbp\n\t" /* context->Rbp */
"movq 0xa8(%rdi),%rsi\n\t" /* context->Rsi */
"movq 0xb8(%rdi),%r8\n\t" /* context->R8 */
"movq 0xc0(%rdi),%r9\n\t" /* context->R9 */
"movq 0xc8(%rdi),%r10\n\t" /* context->R10 */
"movq 0xd0(%rdi),%r11\n\t" /* context->R11 */
"movq 0xd8(%rdi),%r12\n\t" /* context->R12 */
"movq 0xe0(%rdi),%r13\n\t" /* context->R13 */
"movq 0xe8(%rdi),%r14\n\t" /* context->R14 */
"movq 0xf0(%rdi),%r15\n\t" /* context->R15 */
"movq 0xf8(%rdi),%rax\n\t" /* context->Rip */
"movq %rax,(%rsp)\n\t"
"fxrstor 0x100(%rdi)\n\t" /* context->FltSave */
"movq 0x78(%rdi),%rax\n\t" /* context->Rax */
"movq 0xb0(%rdi),%rdi\n\t" /* context->Rdi */
"iretq" );
/***********************************************************************
* restore_xstate
*
* Restore the XState context.
*/
static void restore_xstate( const CONTEXT *context )
{
XSAVE_FORMAT *xrstor_base;
XSTATE *xs;
if (!(xs = xstate_from_context( context )))
return;
xrstor_base = (XSAVE_FORMAT *)xs - 1;
if (!(xs->CompactionMask & ((ULONG64)1 << 63)))
{
/* Non-compacted xrstor will load Mxcsr regardless of the specified mask. Loading garbage there
* may lead to fault. We have only padding, no more used EXCEPTION_RECORD or unused context fields
* at the MxCsr restore location, so just put it there. */
assert( (void *)&xrstor_base->MxCsr > (void *)context->VectorRegister );
xrstor_base->MxCsr = context->u.FltSave.MxCsr;
xrstor_base->MxCsr_Mask = context->u.FltSave.MxCsr_Mask;
}
__asm__ volatile( "xrstor64 %0" : : "m"(*xrstor_base), "a" (4), "d" (0) );
}
/***********************************************************************
* get_server_context_flags
*
* Convert CPU-specific flags to generic server flags
*/
static unsigned int get_server_context_flags( DWORD flags )
{
unsigned int ret = 0;
flags &= ~CONTEXT_AMD64; /* get rid of CPU id */
if (flags & CONTEXT_CONTROL) ret |= SERVER_CTX_CONTROL;
if (flags & CONTEXT_INTEGER) ret |= SERVER_CTX_INTEGER;
if (flags & CONTEXT_SEGMENTS) ret |= SERVER_CTX_SEGMENTS;
if (flags & CONTEXT_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT;
if (flags & CONTEXT_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS;
return ret;
}
/***********************************************************************
* context_to_server
*
* Convert a register context to the server format.
*/
NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
{
DWORD flags = from->ContextFlags & ~CONTEXT_AMD64; /* get rid of CPU id */
memset( to, 0, sizeof(*to) );
to->cpu = CPU_x86_64;
if (flags & CONTEXT_CONTROL)
{
to->flags |= SERVER_CTX_CONTROL;
to->ctl.x86_64_regs.rbp = from->Rbp;
to->ctl.x86_64_regs.rip = from->Rip;
to->ctl.x86_64_regs.rsp = from->Rsp;
to->ctl.x86_64_regs.cs = from->SegCs;
to->ctl.x86_64_regs.ss = from->SegSs;
to->ctl.x86_64_regs.flags = from->EFlags;
}
if (flags & CONTEXT_INTEGER)
{
to->flags |= SERVER_CTX_INTEGER;
to->integer.x86_64_regs.rax = from->Rax;
to->integer.x86_64_regs.rcx = from->Rcx;
to->integer.x86_64_regs.rdx = from->Rdx;
to->integer.x86_64_regs.rbx = from->Rbx;
to->integer.x86_64_regs.rsi = from->Rsi;
to->integer.x86_64_regs.rdi = from->Rdi;
to->integer.x86_64_regs.r8 = from->R8;
to->integer.x86_64_regs.r9 = from->R9;
to->integer.x86_64_regs.r10 = from->R10;
to->integer.x86_64_regs.r11 = from->R11;
to->integer.x86_64_regs.r12 = from->R12;
to->integer.x86_64_regs.r13 = from->R13;
to->integer.x86_64_regs.r14 = from->R14;
to->integer.x86_64_regs.r15 = from->R15;
}
if (flags & CONTEXT_SEGMENTS)
{
to->flags |= SERVER_CTX_SEGMENTS;
to->seg.x86_64_regs.ds = from->SegDs;
to->seg.x86_64_regs.es = from->SegEs;
to->seg.x86_64_regs.fs = from->SegFs;
to->seg.x86_64_regs.gs = from->SegGs;
}
if (flags & CONTEXT_FLOATING_POINT)
{
to->flags |= SERVER_CTX_FLOATING_POINT;
memcpy( to->fp.x86_64_regs.fpregs, &from->u.FltSave, sizeof(to->fp.x86_64_regs.fpregs) );
}
if (flags & CONTEXT_DEBUG_REGISTERS)
{
to->flags |= SERVER_CTX_DEBUG_REGISTERS;
to->debug.x86_64_regs.dr0 = from->Dr0;
to->debug.x86_64_regs.dr1 = from->Dr1;
to->debug.x86_64_regs.dr2 = from->Dr2;
to->debug.x86_64_regs.dr3 = from->Dr3;
to->debug.x86_64_regs.dr6 = from->Dr6;
to->debug.x86_64_regs.dr7 = from->Dr7;
}
return STATUS_SUCCESS;
}
/***********************************************************************
* context_from_server
*
* Convert a register context from the server format.
*/
NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
{
if (from->cpu != CPU_x86_64) return STATUS_INVALID_PARAMETER;
to->ContextFlags = CONTEXT_AMD64;
if (from->flags & SERVER_CTX_CONTROL)
{
to->ContextFlags |= CONTEXT_CONTROL;
to->Rbp = from->ctl.x86_64_regs.rbp;
to->Rip = from->ctl.x86_64_regs.rip;
to->Rsp = from->ctl.x86_64_regs.rsp;
to->SegCs = from->ctl.x86_64_regs.cs;
to->SegSs = from->ctl.x86_64_regs.ss;
to->EFlags = from->ctl.x86_64_regs.flags;
}
if (from->flags & SERVER_CTX_INTEGER)
{
to->ContextFlags |= CONTEXT_INTEGER;
to->Rax = from->integer.x86_64_regs.rax;
to->Rcx = from->integer.x86_64_regs.rcx;
to->Rdx = from->integer.x86_64_regs.rdx;
to->Rbx = from->integer.x86_64_regs.rbx;
to->Rsi = from->integer.x86_64_regs.rsi;
to->Rdi = from->integer.x86_64_regs.rdi;
to->R8 = from->integer.x86_64_regs.r8;
to->R9 = from->integer.x86_64_regs.r9;
to->R10 = from->integer.x86_64_regs.r10;
to->R11 = from->integer.x86_64_regs.r11;
to->R12 = from->integer.x86_64_regs.r12;
to->R13 = from->integer.x86_64_regs.r13;
to->R14 = from->integer.x86_64_regs.r14;
to->R15 = from->integer.x86_64_regs.r15;
}
if (from->flags & SERVER_CTX_SEGMENTS)
{
to->ContextFlags |= CONTEXT_SEGMENTS;
to->SegDs = from->seg.x86_64_regs.ds;
to->SegEs = from->seg.x86_64_regs.es;
to->SegFs = from->seg.x86_64_regs.fs;
to->SegGs = from->seg.x86_64_regs.gs;
}
if (from->flags & SERVER_CTX_FLOATING_POINT)
{
to->ContextFlags |= CONTEXT_FLOATING_POINT;
memcpy( &to->u.FltSave, from->fp.x86_64_regs.fpregs, sizeof(from->fp.x86_64_regs.fpregs) );
to->MxCsr = to->u.FltSave.MxCsr;
}
if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
{
to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
to->Dr0 = from->debug.x86_64_regs.dr0;
to->Dr1 = from->debug.x86_64_regs.dr1;
to->Dr2 = from->debug.x86_64_regs.dr2;
to->Dr3 = from->debug.x86_64_regs.dr3;
to->Dr6 = from->debug.x86_64_regs.dr6;
to->Dr7 = from->debug.x86_64_regs.dr7;
}
return STATUS_SUCCESS;
}
/***********************************************************************
* NtSetContextThread (NTDLL.@)
* ZwSetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
{
NTSTATUS ret = STATUS_SUCCESS;
DWORD flags = context->ContextFlags & ~CONTEXT_AMD64;
BOOL self = (handle == GetCurrentThread());
/* 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)
{
context_t server_context;
context_to_server( &server_context, context );
ret = set_thread_context( handle, &server_context, &self );
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;
}
}
restore_xstate( context );
if (flags & CONTEXT_FULL)
{
if (!(flags & CONTEXT_CONTROL))
FIXME( "setting partial context (%x) not supported\n", flags );
else
set_full_cpu_context( context );
}
return ret;
}
/***********************************************************************
* NtGetContextThread (NTDLL.@)
* ZwGetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
{
NTSTATUS ret, xsave_status;
DWORD needed_flags;
struct syscall_frame *frame = amd64_thread_data()->syscall_frame;
BOOL self = (handle == GetCurrentThread());
if (!context) return STATUS_INVALID_PARAMETER;
/* Save xstate before any calls which can potentially change volatile ymm registers.
* E. g., debug output will clobber ymm registers. */
xsave_status = self ? save_xstate( context ) : STATUS_SUCCESS; /* FIXME: other thread. */
needed_flags = context->ContextFlags & ~CONTEXT_AMD64;
/* debug registers require a server call */
if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_AMD64)) self = FALSE;
if (!self)
{
context_t server_context;
unsigned int server_flags = get_server_context_flags( context->ContextFlags );
if ((ret = get_thread_context( handle, &server_context, server_flags, &self ))) return ret;
if ((ret = context_from_server( context, &server_context ))) return ret;
needed_flags &= ~context->ContextFlags;
}
if (self)
{
if (needed_flags & CONTEXT_INTEGER)
{
context->Rax = 0;
context->Rbx = frame->rbx;
context->Rcx = 0;
context->Rdx = 0;
context->Rsi = frame->rsi;
context->Rdi = frame->rdi;
context->R8 = 0;
context->R9 = 0;
context->R10 = 0;
context->R11 = 0;
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 = (ULONG64)&frame->ret_addr;
context->Rbp = frame->rbp;
context->Rip = frame->thunk_addr;
context->EFlags = 0x202;
__asm__( "movw %%cs,%0" : "=g" (context->SegCs) );
__asm__( "movw %%ss,%0" : "=g" (context->SegSs) );
context->ContextFlags |= CONTEXT_CONTROL;
}
if (needed_flags & CONTEXT_SEGMENTS)
{
__asm__( "movw %%ds,%0" : "=g" (context->SegDs) );
__asm__( "movw %%es,%0" : "=g" (context->SegEs) );
__asm__( "movw %%fs,%0" : "=g" (context->SegFs) );
__asm__( "movw %%gs,%0" : "=g" (context->SegGs) );
context->ContextFlags |= CONTEXT_SEGMENTS;
}
if (needed_flags & CONTEXT_FLOATING_POINT)
{
__asm__( "fxsave %0" : "=m" (context->u.FltSave) );
context->MxCsr = frame->mxcsr;
memset( &context->u.s.Xmm0, 0, 6 * sizeof(context->u.s.Xmm0) );
memcpy( &context->u.s.Xmm6, frame->xmm, 10 * sizeof(context->u.s.Xmm0) );
context->ContextFlags |= CONTEXT_FLOATING_POINT;
}
/* update the cached version of the debug registers */
if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_AMD64))
{
amd64_thread_data()->dr0 = context->Dr0;
amd64_thread_data()->dr1 = context->Dr1;
amd64_thread_data()->dr2 = context->Dr2;
amd64_thread_data()->dr3 = context->Dr3;
amd64_thread_data()->dr6 = context->Dr6;
amd64_thread_data()->dr7 = context->Dr7;
}
}
return xsave_status;
}
extern void CDECL raise_func_trampoline( void *dispatcher );
__ASM_GLOBAL_FUNC( raise_func_trampoline,
"jmpq *%r8\n\t")
/***********************************************************************
* 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;
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);
if (xcontext->xstate)
{
stack_size += (ULONG_PTR)stack_ptr - (((ULONG_PTR)stack_ptr
- sizeof(XSTATE)) & ~(ULONG_PTR)63);
}
stack = virtual_setup_exception( stack_ptr, stack_size, rec );
stack->rec = *rec;
stack->context = *context;
if (xcontext->xstate)
{
XSTATE *dst_xs = (XSTATE *)stack->xstate;
assert( !((ULONG_PTR)dst_xs & 63) );
context_init_xstate( &stack->context, stack->xstate );
dst_xs->CompactionMask = user_shared_data->XState.CompactionEnabled ? 0x8000000000000004 : 0;
if (xcontext->xstate->Mask & 4)
{
dst_xs->Mask = 4;
memcpy( &dst_xs->YmmContext, &xcontext->xstate->YmmContext, sizeof(dst_xs->YmmContext) );
}
}
RIP_sig(sigcontext) = (ULONG_PTR)raise_func_trampoline;
R8_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);
}
/***********************************************************************
* 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
*/
__ASM_GLOBAL_FUNC( call_user_apc_dispatcher,
"movq 0x28(%rsp),%rsi\n\t" /* func */
"movq 0x30(%rsp),%rdi\n\t" /* dispatcher */
"movq %gs:0x30,%rbx\n\t"
"jrcxz 1f\n\t"
"movq 0x98(%rcx),%rax\n\t" /* context_ptr->Rsp */
"leaq -0x5c0(%rax),%rsp\n\t" /* sizeof(CONTEXT) + offsetof(frame,ret_addr) */
"jmp 2f\n"
"1:\tmovq 0x328(%rbx),%rax\n\t" /* amd64_thread_data()->syscall_frame */
"leaq -0x4d0(%rax),%r10\n\t"
"movq %rdx,%r12\n\t" /* ctx */
"movq %r8,%r13\n\t" /* arg1 */
"movq %r9,%r14\n\t" /* arg2 */
"cmpq %rsp,%r10\n\t"
"cmovbq %r10,%rsp\n\t"
"andq $~15,%rsp\n\t"
"movq %rsp,%rdx\n\t" /* context */
"movl $0x10000b,0x30(%rdx)\n\t" /* context.ContextFlags */
"movq $~1,%rcx\n\t"
"call " __ASM_NAME("NtGetContextThread") "\n\t"
"movq %rsp,%rcx\n\t" /* context */
"movl $0xc0,%eax\n\t"
"movq %rax,0x78(%rcx)\n\t" /* context.Rax = STATUS_USER_APC */
"movq %r12,%rdx\n\t" /* ctx */
"movq %r13,%r8\n\t" /* arg1 */
"movq %r14,%r9\n" /* arg2 */
"2:\tmovq $0,0x328(%rbx)\n\t"
"movq %rsi,0x20(%rsp)\n\t" /* func */
"leaq -8(%rsp),%rsp\n\t"
"jmp *%rdi" )
/***********************************************************************
* call_raise_user_exception_dispatcher
*/
__ASM_GLOBAL_FUNC( call_raise_user_exception_dispatcher,
"movq %gs:0x30,%rdx\n\t"
"movq 0x328(%rdx),%rax\n\t" /* amd64_thread_data()->syscall_frame */
"movdqu 0x0(%rax),%xmm6\n\t" /* frame->xmm[0..19] */
"movdqu 0x10(%rax),%xmm7\n\t"
"movdqu 0x20(%rax),%xmm8\n\t"
"movdqu 0x30(%rax),%xmm9\n\t"
"movdqu 0x40(%rax),%xmm10\n\t"
"movdqu 0x50(%rax),%xmm11\n\t"
"movdqu 0x60(%rax),%xmm12\n\t"
"movdqu 0x70(%rax),%xmm13\n\t"
"movdqu 0x80(%rax),%xmm14\n\t"
"movdqu 0x90(%rax),%xmm15\n\t"
"ldmxcsr 0xa0(%rax)\n\t" /* frame->mxcsr */
"movq 0xa8(%rax),%r12\n\t" /* frame->r12 */
"movq 0xb0(%rax),%r13\n\t" /* frame->r13 */
"movq 0xb8(%rax),%r14\n\t" /* frame->r14 */
"movq 0xc0(%rax),%r15\n\t" /* frame->r15 */
"movq 0xc8(%rax),%rdi\n\t" /* frame->rdi */
"movq 0xd0(%rax),%rsi\n\t" /* frame->rsi */
"movq 0xd8(%rax),%rbx\n\t" /* frame->rbx */
"movq 0xe0(%rax),%rbp\n\t" /* frame->rbp */
"movq $0,0x328(%rdx)\n\t"
"leaq 0xf0(%rax),%rsp\n\t"
"jmpq *%rcx" )
/***********************************************************************
* call_user_exception_dispatcher
*/
extern void WINAPI user_exception_dispatcher_trampoline( struct stack_layout *stack,
void *pKiUserExceptionDispatcher );
__ASM_GLOBAL_FUNC( user_exception_dispatcher_trampoline,
"movq %rcx,%rsp\n\t"
"movq 0x98(%rsp),%rcx\n\t" /* context->Rsp */
"movq 0xa0(%rsp),%rbp\n\t"
"movq 0xa8(%rsp),%rsi\n\t"
"movq 0xb0(%rsp),%rdi\n\t"
"jmpq *%rdx")
void WINAPI do_call_user_exception_dispatcher( EXCEPTION_RECORD *rec, CONTEXT *context,
NTSTATUS (WINAPI *dispatcher)(EXCEPTION_RECORD*,CONTEXT*),
struct stack_layout *stack )
{
if ((context->ContextFlags & CONTEXT_XSTATE) == CONTEXT_XSTATE)
{
CONTEXT_EX *xctx = (CONTEXT_EX *)context + 1;
XSTATE *xs, *src_xs, xs_buf;
src_xs = xstate_from_context(context);
if ((CONTEXT *)src_xs >= &stack->context + 1 || src_xs + 1 <= (XSTATE *)&stack->context)
{
xs = src_xs;
}
else
{
xs = &xs_buf;
memcpy(xs, src_xs, sizeof(*xs));
}
memmove(&stack->context, context, sizeof(*context) + sizeof(*xctx));
assert(!((ULONG_PTR)stack->xstate & 63));
context_init_xstate(&stack->context, stack->xstate);
memcpy(stack->xstate, xs, sizeof(*xs));
}
else
{
memmove(&stack->context, context, sizeof(*context));
}
memcpy(&stack->rec, rec, sizeof(*rec));
/* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
if (stack->rec.ExceptionCode == EXCEPTION_BREAKPOINT) stack->context.Rip--;
amd64_thread_data()->syscall_frame = NULL;
user_exception_dispatcher_trampoline( stack, dispatcher );
}
__ASM_GLOBAL_FUNC( call_user_exception_dispatcher,
"movq 0x98(%rdx),%r9\n\t" /* context->Rsp */
"andq $~0xf,%r9\n\t"
"btl $6,0x30(%rdx)\n\t" /* context->ContextFlags, CONTEXT_XSTATE bit. */
"jnc 1f\n\t"
"subq $0x140,%r9\n\t" /* sizeof(XSTATE) */
"andq $~63,%r9\n"
"1:\tsubq $0x5b0,%r9\n\t" /* sizeof(struct stack_layout) */
"cmpq %rsp,%r9\n\t"
"cmovbq %r9,%rsp\n\t"
"jmp " __ASM_NAME("do_call_user_exception_dispatcher") "\n\t")
/***********************************************************************
* 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;
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;
__WINE_FRAME *wine_frame = (__WINE_FRAME *)NtCurrentTeb()->Tib.ExceptionList;
DWORD i;
if (!frame) return FALSE;
TRACE( "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( " info[%d]=%016lx\n", i, rec->ExceptionInformation[i] );
TRACE(" rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
context->Rax, context->Rbx, context->Rcx, context->Rdx );
TRACE(" rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
context->Rsi, context->Rdi, context->Rbp, context->Rsp );
TRACE(" r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
context->R8, context->R9, context->R10, context->R11 );
TRACE(" r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
context->R12, context->R13, context->R14, context->R15 );
if ((char *)wine_frame < (char *)frame)
{
TRACE( "returning to handler\n" );
RCX_sig(sigcontext) = (ULONG_PTR)&wine_frame->jmp;
RDX_sig(sigcontext) = 1;
RIP_sig(sigcontext) = (ULONG_PTR)__wine_longjmp;
}
else
{
XMM_SAVE_AREA32 *fpu = FPU_sig(sigcontext);
TRACE( "returning to user mode ip=%016lx ret=%08x\n", frame->ret_addr, rec->ExceptionCode );
RAX_sig(sigcontext) = rec->ExceptionCode;
RBX_sig(sigcontext) = frame->rbx;
RSI_sig(sigcontext) = frame->rsi;
RDI_sig(sigcontext) = frame->rdi;
RBP_sig(sigcontext) = frame->rbp;
R12_sig(sigcontext) = frame->r12;
R13_sig(sigcontext) = frame->r13;
R14_sig(sigcontext) = frame->r14;
R15_sig(sigcontext) = frame->r15;
RSP_sig(sigcontext) = (ULONG_PTR)&frame->ret_addr;
RIP_sig(sigcontext) = frame->thunk_addr;
if (fpu)
{
fpu->MxCsr =frame->mxcsr;
memcpy( fpu->XmmRegisters + 6, frame->xmm, sizeof(frame->xmm) );
}
amd64_thread_data()->syscall_frame = NULL;
}
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) return;
break;
case TRAP_x86_ALIGNFLT: /* Alignment check exception */
rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
break;
default:
ERR( "Got unexpected trap %ld\n", (ULONG_PTR)TRAP_sig(ucontext) );
/* fall through */
case TRAP_x86_NMI: /* NMI interrupt */
case TRAP_x86_DNA: /* Device not available exception */
case TRAP_x86_DOUBLEFLT: /* Double fault exception */
case TRAP_x86_TSSFLT: /* Invalid TSS exception */
case TRAP_x86_MCHK: /* Machine check exception */
case TRAP_x86_CACHEFLT: /* Cache flush exception */
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
}
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;
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 )
{
EXCEPTION_RECORD rec = { CONTROL_C_EXIT };
setup_exception( sigcontext, &rec );
}
/**********************************************************************
* abrt_handler
*
* Handler for SIGABRT.
*/
static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { EXCEPTION_WINE_ASSERTION, EH_NONCONTINUABLE };
setup_exception( sigcontext, &rec );
}
/**********************************************************************
* quit_handler
*
* Handler for SIGQUIT.
*/
static void quit_handler( int signal, siginfo_t *siginfo, void *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;
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)
{
}
/**********************************************************************
* 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 );
#elif defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
amd64_set_gsbase( teb );
#elif defined(__NetBSD__)
sysarch( X86_64_SET_GSBASE, &teb );
#elif defined (__APPLE__)
__asm__ volatile (".byte 0x65\n\tmovq %0,%c1"
:
: "r" (teb->Tib.Self), "n" (FIELD_OFFSET(TEB, Tib.Self)));
__asm__ volatile (".byte 0x65\n\tmovq %0,%c1"
:
: "r" (teb->ThreadLocalStoragePointer), "n" (FIELD_OFFSET(TEB, ThreadLocalStoragePointer)));
/* alloc_tls_slot() needs to poke a value to an address relative to each
thread's gsbase. Have each thread record its gsbase pointer into its
TEB so alloc_tls_slot() can find it. */
teb->Reserved5[0] = mac_thread_gsbase();
#else
# error Please define setting %gs for your architecture
#endif
#ifdef __GNUC__
__asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw));
#else
FIXME("FPU setup not implemented for this platform.\n");
#endif
}
/**********************************************************************
* signal_init_process
*/
void signal_init_process(void)
{
struct sigaction sig_act;
sig_act.sa_mask = server_block_set;
sig_act.sa_flags = SA_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);
}
/***********************************************************************
* init_thread_context
*/
static void init_thread_context( CONTEXT *context, LPTHREAD_START_ROUTINE entry, void *arg )
{
__asm__( "movw %%cs,%0" : "=m" (context->SegCs) );
__asm__( "movw %%ss,%0" : "=m" (context->SegSs) );
context->Rcx = (ULONG_PTR)entry;
context->Rdx = (ULONG_PTR)arg;
context->Rsp = (ULONG_PTR)NtCurrentTeb()->Tib.StackBase - 0x28;
context->Rip = (ULONG_PTR)pRtlUserThreadStart;
context->EFlags = 0x200;
context->u.FltSave.ControlWord = 0x27f;
context->u.FltSave.MxCsr = context->MxCsr = 0x1f80;
}
/***********************************************************************
* get_initial_context
*/
PCONTEXT DECLSPEC_HIDDEN get_initial_context( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend )
{
CONTEXT *ctx;
if (suspend)
{
CONTEXT context = { 0 };
context.ContextFlags = CONTEXT_ALL;
init_thread_context( &context, entry, arg );
wait_suspend( &context );
ctx = (CONTEXT *)((ULONG_PTR)context.Rsp & ~15) - 1;
*ctx = context;
}
else
{
ctx = (CONTEXT *)((char *)NtCurrentTeb()->Tib.StackBase - 0x30) - 1;
init_thread_context( ctx, entry, arg );
}
pthread_sigmask( SIG_UNBLOCK, &server_block_set, NULL );
ctx->ContextFlags = CONTEXT_FULL;
return ctx;
}
/***********************************************************************
* 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 %gs:0x30,%rax\n\t"
"movq %rsp,0x320(%rax)\n\t" /* amd64_thread_data()->exit_frame */
/* switch to thread stack */
"movq 8(%rax),%rax\n\t" /* NtCurrentTeb()->Tib.StackBase */
"movq %rcx,%rbx\n\t" /* thunk */
"leaq -0x1000(%rax),%rsp\n\t"
/* attach dlls */
"call " __ASM_NAME("get_initial_context") "\n\t"
"movq %rax,%rcx\n\t" /* context */
"xorq %rax,%rax\n\t"
"pushq %rax\n\t"
"jmp *%rbx" )
/***********************************************************************
* signal_exit_thread
*/
__ASM_GLOBAL_FUNC( signal_exit_thread,
/* fetch exit frame */
"movq %gs:0x30,%rax\n\t"
"movq 0x320(%rax),%rdx\n\t" /* amd64_thread_data()->exit_frame */
"testq %rdx,%rdx\n\t"
"jnz 1f\n\t"
"jmp *%rsi\n"
/* switch to exit frame stack */
"1:\tmovq $0,0x330(%rax)\n\t"
"movq %rdx,%rsp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 56\n\t")
__ASM_CFI(".cfi_rel_offset %rbp,48\n\t")
__ASM_CFI(".cfi_rel_offset %rbx,40\n\t")
__ASM_CFI(".cfi_rel_offset %r12,32\n\t")
__ASM_CFI(".cfi_rel_offset %r13,24\n\t")
__ASM_CFI(".cfi_rel_offset %r14,16\n\t")
__ASM_CFI(".cfi_rel_offset %r15,8\n\t")
"call *%rsi" )
#endif /* __x86_64__ */
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