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Sweden-Number/dlls/ntdll/signal_arm64.c

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/*
* ARM64 signal handling routines
*
* Copyright 2010-2013 André Hentschel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifdef __aarch64__
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <signal.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
# include <unistd.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
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.h"
#include "wine/library.h"
#include "wine/exception.h"
#include "ntdll_misc.h"
#include "wine/debug.h"
#include "winnt.h"
WINE_DEFAULT_DEBUG_CHANNEL(seh);
WINE_DECLARE_DEBUG_CHANNEL(relay);
static pthread_key_t teb_key;
/***********************************************************************
* signal context platform-specific definitions
*/
#ifdef linux
/* All Registers access - only for local access */
# define REG_sig(reg_name, context) ((context)->uc_mcontext.reg_name)
# define REGn_sig(reg_num, context) ((context)->uc_mcontext.regs[reg_num])
/* Special Registers access */
# define SP_sig(context) REG_sig(sp, context) /* Stack pointer */
# define PC_sig(context) REG_sig(pc, context) /* Program counter */
# define PSTATE_sig(context) REG_sig(pstate, context) /* Current State Register */
# define FP_sig(context) REGn_sig(29, context) /* Frame pointer */
# define LR_sig(context) REGn_sig(30, context) /* Link Register */
static struct _aarch64_ctx *get_extended_sigcontext( ucontext_t *sigcontext, unsigned int magic )
{
struct _aarch64_ctx *ctx = (struct _aarch64_ctx *)sigcontext->uc_mcontext.__reserved;
while ((char *)ctx < (char *)(&sigcontext->uc_mcontext + 1) && ctx->magic && ctx->size)
{
if (ctx->magic == magic) return ctx;
ctx = (struct _aarch64_ctx *)((char *)ctx + ctx->size);
}
return NULL;
}
static struct fpsimd_context *get_fpsimd_context( ucontext_t *sigcontext )
{
return (struct fpsimd_context *)get_extended_sigcontext( sigcontext, FPSIMD_MAGIC );
}
static DWORD64 get_fault_esr( ucontext_t *sigcontext )
{
struct esr_context *esr = (struct esr_context *)get_extended_sigcontext( sigcontext, ESR_MAGIC );
if (esr) return esr->esr;
return 0;
}
#endif /* linux */
static const size_t teb_size = 0x2000; /* we reserve two pages for the TEB */
static const size_t signal_stack_size = max( MINSIGSTKSZ, 8192 );
/* stack layout when calling an exception raise function */
struct stack_layout
{
CONTEXT context;
EXCEPTION_RECORD rec;
void *redzone[2];
};
typedef int (*wine_signal_handler)(unsigned int sig);
static wine_signal_handler handlers[256];
struct arm64_thread_data
{
void *exit_frame; /* exit frame pointer */
CONTEXT *context; /* context to set with SIGUSR2 */
};
C_ASSERT( sizeof(struct arm64_thread_data) <= sizeof(((TEB *)0)->SystemReserved2) );
C_ASSERT( offsetof( TEB, SystemReserved2 ) + offsetof( struct arm64_thread_data, exit_frame ) == 0x300 );
static inline struct arm64_thread_data *arm64_thread_data(void)
{
return (struct arm64_thread_data *)NtCurrentTeb()->SystemReserved2;
}
/***********************************************************************
* dispatch_signal
*/
static inline int dispatch_signal(unsigned int sig)
{
if (handlers[sig] == NULL) return 0;
return handlers[sig](sig);
}
/***********************************************************************
* get_signal_stack
*
* Get the base of the signal stack for the current thread.
*/
static inline void *get_signal_stack(void)
{
return (char *)NtCurrentTeb() + teb_size;
}
/*******************************************************************
* is_valid_frame
*/
static inline BOOL is_valid_frame( ULONG_PTR frame )
{
if (frame & 7) return FALSE;
return ((void *)frame >= NtCurrentTeb()->Tib.StackLimit &&
(void **)frame < (void **)NtCurrentTeb()->Tib.StackBase - 1);
}
/***********************************************************************
* is_inside_signal_stack
*
* Check if pointer is inside the signal stack.
*/
static inline BOOL is_inside_signal_stack( void *ptr )
{
return ((char *)ptr >= (char *)get_signal_stack() &&
(char *)ptr < (char *)get_signal_stack() + signal_stack_size);
}
/***********************************************************************
* save_context
*
* Set the register values from a sigcontext.
*/
static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
{
DWORD i;
context->ContextFlags = CONTEXT_FULL;
context->u.s.Fp = FP_sig(sigcontext); /* Frame pointer */
context->u.s.Lr = LR_sig(sigcontext); /* Link register */
context->Sp = SP_sig(sigcontext); /* Stack pointer */
context->Pc = PC_sig(sigcontext); /* Program Counter */
context->Cpsr = PSTATE_sig(sigcontext); /* Current State Register */
for (i = 0; i <= 28; i++) context->u.X[i] = REGn_sig( i, sigcontext );
}
/***********************************************************************
* restore_context
*
* Build a sigcontext from the register values.
*/
static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
{
DWORD i;
FP_sig(sigcontext) = context->u.s.Fp; /* Frame pointer */
LR_sig(sigcontext) = context->u.s.Lr; /* Link register */
SP_sig(sigcontext) = context->Sp; /* Stack pointer */
PC_sig(sigcontext) = context->Pc; /* Program Counter */
PSTATE_sig(sigcontext) = context->Cpsr; /* Current State Register */
for (i = 0; i <= 28; i++) REGn_sig( i, sigcontext ) = context->u.X[i];
}
/***********************************************************************
* save_fpu
*
* Set the FPU context from a sigcontext.
*/
static void save_fpu( CONTEXT *context, ucontext_t *sigcontext )
{
struct fpsimd_context *fp = get_fpsimd_context( sigcontext );
if (!fp) return;
context->ContextFlags |= CONTEXT_FLOATING_POINT;
context->Fpcr = fp->fpcr;
context->Fpsr = fp->fpsr;
memcpy( context->V, fp->vregs, sizeof(context->V) );
}
/***********************************************************************
* restore_fpu
*
* Restore the FPU context to a sigcontext.
*/
static void restore_fpu( CONTEXT *context, ucontext_t *sigcontext )
{
struct fpsimd_context *fp = get_fpsimd_context( sigcontext );
if (!fp) return;
fp->fpcr = context->Fpcr;
fp->fpsr = context->Fpsr;
memcpy( fp->vregs, context->V, sizeof(fp->vregs) );
}
/***********************************************************************
* RtlCaptureContext (NTDLL.@)
*/
__ASM_STDCALL_FUNC( RtlCaptureContext, 8,
"stp x1, x2, [x0, #0x10]\n\t" /* context->X1,X2 */
"stp x3, x4, [x0, #0x20]\n\t" /* context->X3,X4 */
"stp x5, x6, [x0, #0x30]\n\t" /* context->X5,X6 */
"stp x7, x8, [x0, #0x40]\n\t" /* context->X7,X8 */
"stp x9, x10, [x0, #0x50]\n\t" /* context->X9,X10 */
"stp x11, x12, [x0, #0x60]\n\t" /* context->X11,X12 */
"stp x13, x14, [x0, #0x70]\n\t" /* context->X13,X14 */
"stp x15, x16, [x0, #0x80]\n\t" /* context->X15,X16 */
"stp x17, x18, [x0, #0x90]\n\t" /* context->X17,X18 */
"stp x19, x20, [x0, #0xa0]\n\t" /* context->X19,X20 */
"stp x21, x22, [x0, #0xb0]\n\t" /* context->X21,X22 */
"stp x23, x24, [x0, #0xc0]\n\t" /* context->X23,X24 */
"stp x25, x26, [x0, #0xd0]\n\t" /* context->X25,X26 */
"stp x27, x28, [x0, #0xe0]\n\t" /* context->X27,X28 */
"ldp x1, x2, [x29]\n\t"
"stp x1, x2, [x0, #0xf0]\n\t" /* context->Fp,Lr */
"add x1, x29, #0x10\n\t"
"stp x1, x30, [x0, #0x100]\n\t" /* context->Sp,Pc */
"mov w1, #0x400000\n\t" /* CONTEXT_ARM64 */
"add w1, w1, #0x3\n\t" /* CONTEXT_FULL */
"str w1, [x0]\n\t" /* context->ContextFlags */
"mrs x1, NZCV\n\t"
"str w1, [x0, #0x4]\n\t" /* context->Cpsr */
"ret" )
/***********************************************************************
* set_cpu_context
*
* Set the new CPU context.
*/
static void set_cpu_context( const CONTEXT *context )
{
interlocked_xchg_ptr( (void **)&arm64_thread_data()->context, (void *)context );
raise( SIGUSR2 );
}
/***********************************************************************
* 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_ARM64; /* get rid of CPU id */
if (flags & CONTEXT_CONTROL) ret |= SERVER_CTX_CONTROL;
if (flags & CONTEXT_INTEGER) ret |= SERVER_CTX_INTEGER;
if (flags & CONTEXT_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT;
if (flags & CONTEXT_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS;
return ret;
}
/***********************************************************************
* copy_context
*
* Copy a register context according to the flags.
*/
static void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags )
{
flags &= ~CONTEXT_ARM64; /* get rid of CPU id */
if (flags & CONTEXT_CONTROL)
{
to->u.s.Fp = from->u.s.Fp;
to->u.s.Lr = from->u.s.Lr;
to->Sp = from->Sp;
to->Pc = from->Pc;
to->Cpsr = from->Cpsr;
}
if (flags & CONTEXT_INTEGER)
{
memcpy( to->u.X, from->u.X, sizeof(to->u.X) );
}
if (flags & CONTEXT_FLOATING_POINT)
{
memcpy( to->V, from->V, sizeof(to->V) );
to->Fpcr = from->Fpcr;
to->Fpsr = from->Fpsr;
}
if (flags & CONTEXT_DEBUG_REGISTERS)
{
memcpy( to->Bcr, from->Bcr, sizeof(to->Bcr) );
memcpy( to->Bvr, from->Bvr, sizeof(to->Bvr) );
memcpy( to->Wcr, from->Wcr, sizeof(to->Wcr) );
memcpy( to->Wvr, from->Wvr, sizeof(to->Wvr) );
}
}
/***********************************************************************
* context_to_server
*
* Convert a register context to the server format.
*/
NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
{
DWORD i, flags = from->ContextFlags & ~CONTEXT_ARM64; /* get rid of CPU id */
memset( to, 0, sizeof(*to) );
to->cpu = CPU_ARM64;
if (flags & CONTEXT_CONTROL)
{
to->flags |= SERVER_CTX_CONTROL;
to->integer.arm64_regs.x[29] = from->u.s.Fp;
to->integer.arm64_regs.x[30] = from->u.s.Lr;
to->ctl.arm64_regs.sp = from->Sp;
to->ctl.arm64_regs.pc = from->Pc;
to->ctl.arm64_regs.pstate = from->Cpsr;
}
if (flags & CONTEXT_INTEGER)
{
to->flags |= SERVER_CTX_INTEGER;
for (i = 0; i <= 28; i++) to->integer.arm64_regs.x[i] = from->u.X[i];
}
if (flags & CONTEXT_FLOATING_POINT)
{
to->flags |= SERVER_CTX_FLOATING_POINT;
for (i = 0; i < 64; i++) to->fp.arm64_regs.d[i] = from->V[i / 2].D[i % 2];
to->fp.arm64_regs.fpcr = from->Fpcr;
to->fp.arm64_regs.fpsr = from->Fpsr;
}
if (flags & CONTEXT_DEBUG_REGISTERS)
{
to->flags |= SERVER_CTX_DEBUG_REGISTERS;
for (i = 0; i < ARM64_MAX_BREAKPOINTS; i++) to->debug.arm64_regs.bcr[i] = from->Bcr[i];
for (i = 0; i < ARM64_MAX_BREAKPOINTS; i++) to->debug.arm64_regs.bvr[i] = from->Bvr[i];
for (i = 0; i < ARM64_MAX_WATCHPOINTS; i++) to->debug.arm64_regs.wcr[i] = from->Wcr[i];
for (i = 0; i < ARM64_MAX_WATCHPOINTS; i++) to->debug.arm64_regs.wvr[i] = from->Wvr[i];
}
return STATUS_SUCCESS;
}
/***********************************************************************
* context_from_server
*
* Convert a register context from the server format.
*/
NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
{
DWORD i;
if (from->cpu != CPU_ARM64) return STATUS_INVALID_PARAMETER;
to->ContextFlags = CONTEXT_ARM64;
if (from->flags & SERVER_CTX_CONTROL)
{
to->ContextFlags |= CONTEXT_CONTROL;
to->u.s.Fp = from->integer.arm64_regs.x[29];
to->u.s.Lr = from->integer.arm64_regs.x[30];
to->Sp = from->ctl.arm64_regs.sp;
to->Pc = from->ctl.arm64_regs.pc;
to->Cpsr = from->ctl.arm64_regs.pstate;
}
if (from->flags & SERVER_CTX_INTEGER)
{
to->ContextFlags |= CONTEXT_INTEGER;
for (i = 0; i <= 28; i++) to->u.X[i] = from->integer.arm64_regs.x[i];
}
if (from->flags & SERVER_CTX_FLOATING_POINT)
{
to->ContextFlags |= CONTEXT_FLOATING_POINT;
for (i = 0; i < 64; i++) to->V[i / 2].D[i % 2] = from->fp.arm64_regs.d[i];
to->Fpcr = from->fp.arm64_regs.fpcr;
to->Fpsr = from->fp.arm64_regs.fpsr;
}
if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
{
to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
for (i = 0; i < ARM64_MAX_BREAKPOINTS; i++) to->Bcr[i] = from->debug.arm64_regs.bcr[i];
for (i = 0; i < ARM64_MAX_BREAKPOINTS; i++) to->Bvr[i] = from->debug.arm64_regs.bvr[i];
for (i = 0; i < ARM64_MAX_WATCHPOINTS; i++) to->Wcr[i] = from->debug.arm64_regs.wcr[i];
for (i = 0; i < ARM64_MAX_WATCHPOINTS; i++) to->Wvr[i] = from->debug.arm64_regs.wvr[i];
}
return STATUS_SUCCESS;
}
/***********************************************************************
* NtSetContextThread (NTDLL.@)
* ZwSetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
{
NTSTATUS ret = STATUS_SUCCESS;
BOOL self = (handle == GetCurrentThread());
if (self && (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_ARM64)))
self = FALSE;
if (!self)
{
context_t server_context;
context_to_server( &server_context, context );
ret = set_thread_context( handle, &server_context, &self );
}
if (self && ret == STATUS_SUCCESS) set_cpu_context( context );
return ret;
}
/***********************************************************************
* NtGetContextThread (NTDLL.@)
* ZwGetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
{
NTSTATUS ret;
DWORD needed_flags = context->ContextFlags;
BOOL self = (handle == GetCurrentThread());
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 && needed_flags)
{
CONTEXT ctx;
RtlCaptureContext( &ctx );
copy_context( context, &ctx, ctx.ContextFlags & needed_flags );
context->ContextFlags |= ctx.ContextFlags & needed_flags;
}
return STATUS_SUCCESS;
}
/***********************************************************************
* libunwind_virtual_unwind
*
* Equivalent of RtlVirtualUnwind for builtin modules.
*/
static NTSTATUS libunwind_virtual_unwind( ULONG_PTR ip, ULONG_PTR *frame, CONTEXT *context,
PEXCEPTION_ROUTINE *handler, void **handler_data )
{
#ifdef HAVE_LIBUNWIND
unw_context_t unw_context;
unw_cursor_t cursor;
unw_proc_info_t info;
int rc;
memcpy( unw_context.uc_mcontext.regs, context->u.X, sizeof(context->u.X) );
unw_context.uc_mcontext.sp = context->Sp;
unw_context.uc_mcontext.pc = context->Pc;
rc = unw_init_local( &cursor, &unw_context );
if (rc != UNW_ESUCCESS)
{
WARN( "setup failed: %d\n", rc );
return STATUS_INVALID_DISPOSITION;
}
rc = unw_get_proc_info( &cursor, &info );
if (rc != UNW_ESUCCESS && rc != UNW_ENOINFO)
{
WARN( "failed to get info: %d\n", rc );
return STATUS_INVALID_DISPOSITION;
}
if (rc == UNW_ENOINFO || ip < info.start_ip || ip > info.end_ip)
{
WARN( "no info found for %lx ip %lx-%lx rc %d\n", ip, info.start_ip, info.end_ip, rc );
return STATUS_SUCCESS;
}
TRACE( "ip %#lx function %#lx-%#lx personality %#lx lsda %#lx fde %#lx\n",
ip, (unsigned long)info.start_ip, (unsigned long)info.end_ip, (unsigned long)info.handler,
(unsigned long)info.lsda, (unsigned long)info.unwind_info );
rc = unw_step( &cursor );
if (rc < 0)
{
WARN( "failed to unwind: %d\n", rc );
return STATUS_INVALID_DISPOSITION;
}
*handler = (void *)info.handler;
*handler_data = (void *)info.lsda;
*frame = context->Sp;
context->Pc = context->u.s.Lr;
unw_get_reg( &cursor, UNW_AARCH64_X0, (unw_word_t *)&context->u.s.X0 );
unw_get_reg( &cursor, UNW_AARCH64_X1, (unw_word_t *)&context->u.s.X1 );
unw_get_reg( &cursor, UNW_AARCH64_X2, (unw_word_t *)&context->u.s.X2 );
unw_get_reg( &cursor, UNW_AARCH64_X3, (unw_word_t *)&context->u.s.X3 );
unw_get_reg( &cursor, UNW_AARCH64_X4, (unw_word_t *)&context->u.s.X4 );
unw_get_reg( &cursor, UNW_AARCH64_X5, (unw_word_t *)&context->u.s.X5 );
unw_get_reg( &cursor, UNW_AARCH64_X6, (unw_word_t *)&context->u.s.X6 );
unw_get_reg( &cursor, UNW_AARCH64_X7, (unw_word_t *)&context->u.s.X7 );
unw_get_reg( &cursor, UNW_AARCH64_X8, (unw_word_t *)&context->u.s.X8 );
unw_get_reg( &cursor, UNW_AARCH64_X9, (unw_word_t *)&context->u.s.X9 );
unw_get_reg( &cursor, UNW_AARCH64_X10, (unw_word_t *)&context->u.s.X10 );
unw_get_reg( &cursor, UNW_AARCH64_X11, (unw_word_t *)&context->u.s.X11 );
unw_get_reg( &cursor, UNW_AARCH64_X12, (unw_word_t *)&context->u.s.X12 );
unw_get_reg( &cursor, UNW_AARCH64_X13, (unw_word_t *)&context->u.s.X13 );
unw_get_reg( &cursor, UNW_AARCH64_X14, (unw_word_t *)&context->u.s.X14 );
unw_get_reg( &cursor, UNW_AARCH64_X15, (unw_word_t *)&context->u.s.X15 );
unw_get_reg( &cursor, UNW_AARCH64_X16, (unw_word_t *)&context->u.s.X16 );
unw_get_reg( &cursor, UNW_AARCH64_X17, (unw_word_t *)&context->u.s.X17 );
unw_get_reg( &cursor, UNW_AARCH64_X18, (unw_word_t *)&context->u.s.X18 );
unw_get_reg( &cursor, UNW_AARCH64_X19, (unw_word_t *)&context->u.s.X19 );
unw_get_reg( &cursor, UNW_AARCH64_X20, (unw_word_t *)&context->u.s.X20 );
unw_get_reg( &cursor, UNW_AARCH64_X21, (unw_word_t *)&context->u.s.X21 );
unw_get_reg( &cursor, UNW_AARCH64_X22, (unw_word_t *)&context->u.s.X22 );
unw_get_reg( &cursor, UNW_AARCH64_X23, (unw_word_t *)&context->u.s.X23 );
unw_get_reg( &cursor, UNW_AARCH64_X24, (unw_word_t *)&context->u.s.X24 );
unw_get_reg( &cursor, UNW_AARCH64_X25, (unw_word_t *)&context->u.s.X25 );
unw_get_reg( &cursor, UNW_AARCH64_X26, (unw_word_t *)&context->u.s.X26 );
unw_get_reg( &cursor, UNW_AARCH64_X27, (unw_word_t *)&context->u.s.X27 );
unw_get_reg( &cursor, UNW_AARCH64_X28, (unw_word_t *)&context->u.s.X28 );
unw_get_reg( &cursor, UNW_AARCH64_X29, (unw_word_t *)&context->u.s.Fp );
unw_get_reg( &cursor, UNW_AARCH64_X30, (unw_word_t *)&context->u.s.Lr );
unw_get_reg( &cursor, UNW_AARCH64_SP, (unw_word_t *)&context->Sp );
TRACE( "next function pc=%016lx\n", context->Pc );
TRACE(" x0=%016lx x1=%016lx x2=%016lx x3=%016lx\n",
context->u.s.X0, context->u.s.X1, context->u.s.X2, context->u.s.X3 );
TRACE(" x4=%016lx x5=%016lx x6=%016lx x7=%016lx\n",
context->u.s.X4, context->u.s.X5, context->u.s.X6, context->u.s.X7 );
TRACE(" x8=%016lx x9=%016lx x10=%016lx x11=%016lx\n",
context->u.s.X8, context->u.s.X9, context->u.s.X10, context->u.s.X11 );
TRACE(" x12=%016lx x13=%016lx x14=%016lx x15=%016lx\n",
context->u.s.X12, context->u.s.X13, context->u.s.X14, context->u.s.X15 );
TRACE(" x16=%016lx x17=%016lx x18=%016lx x19=%016lx\n",
context->u.s.X16, context->u.s.X17, context->u.s.X18, context->u.s.X19 );
TRACE(" x20=%016lx x21=%016lx x22=%016lx x23=%016lx\n",
context->u.s.X20, context->u.s.X21, context->u.s.X22, context->u.s.X23 );
TRACE(" x24=%016lx x25=%016lx x26=%016lx x27=%016lx\n",
context->u.s.X24, context->u.s.X25, context->u.s.X26, context->u.s.X27 );
TRACE(" x28=%016lx fp=%016lx lr=%016lx sp=%016lx\n",
context->u.s.X28, context->u.s.Fp, context->u.s.Lr, context->Sp );
#endif
return STATUS_SUCCESS;
}
/**********************************************************************
* virtual_unwind
*/
static NTSTATUS virtual_unwind( ULONG type, DISPATCHER_CONTEXT *dispatch, CONTEXT *context )
{
LDR_MODULE *module;
NTSTATUS status;
dispatch->ImageBase = 0;
dispatch->ScopeIndex = 0;
dispatch->EstablisherFrame = 0;
dispatch->ControlPc = context->Pc;
/* first look for PE exception information */
if ((dispatch->FunctionEntry = lookup_function_info( context->Pc, &dispatch->ImageBase, &module )))
{
dispatch->LanguageHandler = RtlVirtualUnwind( type, dispatch->ImageBase, context->Pc,
dispatch->FunctionEntry, context,
&dispatch->HandlerData, &dispatch->EstablisherFrame,
NULL );
return STATUS_SUCCESS;
}
/* then look for host system exception information */
if (!module || (module->Flags & LDR_WINE_INTERNAL))
{
status = libunwind_virtual_unwind( context->Pc, &dispatch->EstablisherFrame, context,
&dispatch->LanguageHandler, &dispatch->HandlerData );
if (status != STATUS_SUCCESS) return status;
if (dispatch->EstablisherFrame)
{
dispatch->FunctionEntry = NULL;
if (dispatch->LanguageHandler && !module)
{
FIXME( "calling personality routine in system library not supported yet\n" );
dispatch->LanguageHandler = NULL;
}
return STATUS_SUCCESS;
}
}
else WARN( "exception data not found in %s\n", debugstr_w(module->BaseDllName.Buffer) );
dispatch->EstablisherFrame = context->u.s.Fp;
dispatch->LanguageHandler = NULL;
context->Pc = context->u.s.Lr;
return STATUS_SUCCESS;
}
struct unwind_exception_frame
{
EXCEPTION_REGISTRATION_RECORD frame;
DISPATCHER_CONTEXT *dispatch;
};
/**********************************************************************
* unwind_exception_handler
*
* Handler for exceptions happening while calling an unwind handler.
*/
static DWORD __cdecl unwind_exception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
struct unwind_exception_frame *unwind_frame = (struct unwind_exception_frame *)frame;
DISPATCHER_CONTEXT *dispatch = (DISPATCHER_CONTEXT *)dispatcher;
/* copy the original dispatcher into the current one, except for the TargetIp */
dispatch->ControlPc = unwind_frame->dispatch->ControlPc;
dispatch->ImageBase = unwind_frame->dispatch->ImageBase;
dispatch->FunctionEntry = unwind_frame->dispatch->FunctionEntry;
dispatch->EstablisherFrame = unwind_frame->dispatch->EstablisherFrame;
dispatch->ContextRecord = unwind_frame->dispatch->ContextRecord;
dispatch->LanguageHandler = unwind_frame->dispatch->LanguageHandler;
dispatch->HandlerData = unwind_frame->dispatch->HandlerData;
dispatch->HistoryTable = unwind_frame->dispatch->HistoryTable;
dispatch->ScopeIndex = unwind_frame->dispatch->ScopeIndex;
TRACE( "detected collided unwind\n" );
return ExceptionCollidedUnwind;
}
/**********************************************************************
* call_unwind_handler
*
* Call a single unwind handler.
*/
static DWORD call_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch )
{
struct unwind_exception_frame frame;
DWORD res;
frame.frame.Handler = unwind_exception_handler;
frame.dispatch = dispatch;
__wine_push_frame( &frame.frame );
TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n",
dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
res = dispatch->LanguageHandler( rec, (void *)dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
TRACE( "handler %p returned %x\n", dispatch->LanguageHandler, res );
__wine_pop_frame( &frame.frame );
switch (res)
{
case ExceptionContinueSearch:
case ExceptionCollidedUnwind:
break;
default:
raise_status( STATUS_INVALID_DISPOSITION, rec );
break;
}
return res;
}
/**********************************************************************
* call_teb_unwind_handler
*
* Call a single unwind handler from the TEB chain.
*/
static DWORD call_teb_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch,
EXCEPTION_REGISTRATION_RECORD *teb_frame )
{
DWORD res;
TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n",
teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, dispatch );
res = teb_frame->Handler( rec, teb_frame, dispatch->ContextRecord, (EXCEPTION_REGISTRATION_RECORD**)dispatch );
TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
switch (res)
{
case ExceptionContinueSearch:
case ExceptionCollidedUnwind:
break;
default:
raise_status( STATUS_INVALID_DISPOSITION, rec );
break;
}
return res;
}
static DWORD __cdecl nested_exception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) return ExceptionContinueSearch;
/* FIXME */
return ExceptionNestedException;
}
/**********************************************************************
* call_handler
*
* Call a single exception handler.
* FIXME: Handle nested exceptions.
*/
static DWORD call_handler( EXCEPTION_RECORD *rec, CONTEXT *context, DISPATCHER_CONTEXT *dispatch )
{
EXCEPTION_REGISTRATION_RECORD frame;
DWORD res;
frame.Handler = nested_exception_handler;
__wine_push_frame( &frame );
TRACE( "calling handler %p (rec=%p, frame=0x%lx context=%p, dispatch=%p)\n",
dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
res = dispatch->LanguageHandler( rec, (void *)dispatch->EstablisherFrame, context, dispatch );
TRACE( "handler at %p returned %u\n", dispatch->LanguageHandler, res );
__wine_pop_frame( &frame );
return res;
}
/**********************************************************************
* call_teb_handler
*
* Call a single exception handler from the TEB chain.
* FIXME: Handle nested exceptions.
*/
static DWORD call_teb_handler( EXCEPTION_RECORD *rec, CONTEXT *context, DISPATCHER_CONTEXT *dispatch,
EXCEPTION_REGISTRATION_RECORD *teb_frame )
{
DWORD res;
TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n",
teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, dispatch );
res = teb_frame->Handler( rec, teb_frame, context, (EXCEPTION_REGISTRATION_RECORD**)dispatch );
TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
return res;
}
/**********************************************************************
* call_function_handlers
*
* Call the per-function handlers.
*/
static NTSTATUS call_function_handlers( EXCEPTION_RECORD *rec, CONTEXT *orig_context )
{
EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
UNWIND_HISTORY_TABLE table;
DISPATCHER_CONTEXT dispatch;
CONTEXT context;
NTSTATUS status;
context = *orig_context;
dispatch.TargetPc = 0;
dispatch.ContextRecord = &context;
dispatch.HistoryTable = &table;
dispatch.NonVolatileRegisters = (BYTE *)&context.u.s.X19;
for (;;)
{
status = virtual_unwind( UNW_FLAG_EHANDLER, &dispatch, &context );
if (status != STATUS_SUCCESS) return status;
unwind_done:
if (!dispatch.EstablisherFrame) break;
if (!is_valid_frame( dispatch.EstablisherFrame ))
{
ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
rec->ExceptionFlags |= EH_STACK_INVALID;
break;
}
if (dispatch.LanguageHandler)
{
switch (call_handler( rec, orig_context, &dispatch ))
{
case ExceptionContinueExecution:
if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
return STATUS_SUCCESS;
case ExceptionContinueSearch:
break;
case ExceptionNestedException:
FIXME( "nested exception\n" );
break;
case ExceptionCollidedUnwind: {
ULONG64 frame;
context = *dispatch.ContextRecord;
dispatch.ContextRecord = &context;
RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
dispatch.ControlPc, dispatch.FunctionEntry,
&context, NULL, &frame, NULL );
goto unwind_done;
}
default:
return STATUS_INVALID_DISPOSITION;
}
}
/* hack: call wine handlers registered in the tib list */
else while ((ULONG64)teb_frame < context.Sp)
{
TRACE( "found wine frame %p rsp %lx handler %p\n",
teb_frame, context.Sp, teb_frame->Handler );
dispatch.EstablisherFrame = (ULONG64)teb_frame;
switch (call_teb_handler( rec, orig_context, &dispatch, teb_frame ))
{
case ExceptionContinueExecution:
if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
return STATUS_SUCCESS;
case ExceptionContinueSearch:
break;
case ExceptionNestedException:
FIXME( "nested exception\n" );
break;
case ExceptionCollidedUnwind: {
ULONG64 frame;
context = *dispatch.ContextRecord;
dispatch.ContextRecord = &context;
RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
dispatch.ControlPc, dispatch.FunctionEntry,
&context, NULL, &frame, NULL );
teb_frame = teb_frame->Prev;
goto unwind_done;
}
default:
return STATUS_INVALID_DISPOSITION;
}
teb_frame = teb_frame->Prev;
}
if (context.Sp == (ULONG64)NtCurrentTeb()->Tib.StackBase) break;
}
return STATUS_UNHANDLED_EXCEPTION;
}
/*******************************************************************
* raise_exception
*
* Implementation of NtRaiseException.
*/
static NTSTATUS raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
{
NTSTATUS status;
if (first_chance)
{
DWORD c;
TRACE( "code=%x flags=%x addr=%p pc=%lx tid=%04x\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
context->Pc, GetCurrentThreadId() );
for (c = 0; c < rec->NumberParameters; c++)
TRACE( " info[%d]=%016lx\n", c, rec->ExceptionInformation[c] );
if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
{
if (rec->ExceptionInformation[1] >> 16)
MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
rec->ExceptionAddress,
(char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
else
MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
rec->ExceptionAddress,
(char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
}
else
{
TRACE(" x0=%016lx x1=%016lx x2=%016lx x3=%016lx\n",
context->u.s.X0, context->u.s.X1, context->u.s.X2, context->u.s.X3 );
TRACE(" x4=%016lx x5=%016lx x6=%016lx x7=%016lx\n",
context->u.s.X4, context->u.s.X5, context->u.s.X6, context->u.s.X7 );
TRACE(" x8=%016lx x9=%016lx x10=%016lx x11=%016lx\n",
context->u.s.X8, context->u.s.X9, context->u.s.X10, context->u.s.X11 );
TRACE(" x12=%016lx x13=%016lx x14=%016lx x15=%016lx\n",
context->u.s.X12, context->u.s.X13, context->u.s.X14, context->u.s.X15 );
TRACE(" x16=%016lx x17=%016lx x18=%016lx x19=%016lx\n",
context->u.s.X16, context->u.s.X17, context->u.s.X18, context->u.s.X19 );
TRACE(" x20=%016lx x21=%016lx x22=%016lx x23=%016lx\n",
context->u.s.X20, context->u.s.X21, context->u.s.X22, context->u.s.X23 );
TRACE(" x24=%016lx x25=%016lx x26=%016lx x27=%016lx\n",
context->u.s.X24, context->u.s.X25, context->u.s.X26, context->u.s.X27 );
TRACE(" x28=%016lx fp=%016lx lr=%016lx sp=%016lx\n",
context->u.s.X28, context->u.s.Fp, context->u.s.Lr, context->Sp );
}
if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION) goto done;
if ((status = call_function_handlers( rec, context )) == STATUS_SUCCESS) goto done;
if (status != STATUS_UNHANDLED_EXCEPTION) return status;
}
/* last chance exception */
status = send_debug_event( rec, FALSE, context );
if (status != DBG_CONTINUE)
{
if (rec->ExceptionFlags & EH_STACK_INVALID)
ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
ERR("Process attempted to continue execution after noncontinuable exception.\n");
else
ERR("Unhandled exception code %x flags %x addr %p\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode );
}
done:
return NtSetContextThread( GetCurrentThread(), context );
}
/***********************************************************************
* setup_exception
*
* Setup the exception record and context on the thread stack.
*/
static struct stack_layout *setup_exception( ucontext_t *sigcontext )
{
struct stack_layout *stack;
DWORD exception_code = 0;
/* push the stack_layout structure */
stack = (struct stack_layout *)((SP_sig(sigcontext) - sizeof(*stack)) & ~15);
stack->rec.ExceptionRecord = NULL;
stack->rec.ExceptionCode = exception_code;
stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
stack->rec.ExceptionAddress = (LPVOID)PC_sig(sigcontext);
stack->rec.NumberParameters = 0;
save_context( &stack->context, sigcontext );
save_fpu( &stack->context, sigcontext );
return stack;
}
/**********************************************************************
* raise_generic_exception
*/
static void WINAPI raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
{
NTSTATUS status = raise_exception( rec, context, TRUE );
raise_status( status, rec );
}
/***********************************************************************
* setup_raise_exception
*
* Modify the signal context to call the exception raise function.
*/
static void setup_raise_exception( ucontext_t *sigcontext, struct stack_layout *stack )
{
NTSTATUS status = send_debug_event( &stack->rec, TRUE, &stack->context );
if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
{
restore_context( &stack->context, sigcontext );
return;
}
SP_sig(sigcontext) = (ULONG_PTR)stack;
PC_sig(sigcontext) = (ULONG_PTR)raise_generic_exception;
REGn_sig(0, sigcontext) = (ULONG_PTR)&stack->rec; /* first arg for raise_generic_exception */
REGn_sig(1, sigcontext) = (ULONG_PTR)&stack->context; /* second arg for raise_generic_exception */
REGn_sig(18, sigcontext) = (ULONG_PTR)NtCurrentTeb();
}
/**********************************************************************
* segv_handler
*
* Handler for SIGSEGV and related errors.
*/
static void segv_handler( int signal, siginfo_t *info, void *ucontext )
{
struct stack_layout *stack;
ucontext_t *context = ucontext;
/* check for page fault inside the thread stack */
if (signal == SIGSEGV)
{
switch (virtual_handle_stack_fault( info->si_addr ))
{
case 1: /* handled */
return;
case -1: /* overflow */
stack = setup_exception( context );
stack->rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
goto done;
}
}
stack = setup_exception( context );
if (stack->rec.ExceptionCode == EXCEPTION_STACK_OVERFLOW) goto done;
switch(signal)
{
case SIGILL: /* Invalid opcode exception */
stack->rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
case SIGSEGV: /* Segmentation fault */
stack->rec.NumberParameters = 2;
stack->rec.ExceptionInformation[0] = (get_fault_esr( context ) & 0x40) != 0;
stack->rec.ExceptionInformation[1] = (ULONG_PTR)info->si_addr;
if (!(stack->rec.ExceptionCode = virtual_handle_fault( (void *)stack->rec.ExceptionInformation[1],
stack->rec.ExceptionInformation[0], FALSE )))
return;
break;
case SIGBUS: /* Alignment check exception */
stack->rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
break;
default:
ERR("Got unexpected signal %i\n", signal);
stack->rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
}
done:
setup_raise_exception( context, stack );
}
/**********************************************************************
* trap_handler
*
* Handler for SIGTRAP.
*/
static void trap_handler( int signal, siginfo_t *info, void *ucontext )
{
ucontext_t *context = ucontext;
struct stack_layout *stack = setup_exception( context );
switch (info->si_code)
{
case TRAP_TRACE:
stack->rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
break;
case TRAP_BRKPT:
default:
stack->rec.ExceptionCode = EXCEPTION_BREAKPOINT;
stack->context.Pc += 4;
break;
}
setup_raise_exception( context, stack );
}
/**********************************************************************
* fpe_handler
*
* Handler for SIGFPE.
*/
static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
struct stack_layout *stack = setup_exception( sigcontext );
switch (siginfo->si_code & 0xffff )
{
#ifdef FPE_FLTSUB
case FPE_FLTSUB:
stack->rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
break;
#endif
#ifdef FPE_INTDIV
case FPE_INTDIV:
stack->rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
break;
#endif
#ifdef FPE_INTOVF
case FPE_INTOVF:
stack->rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
break;
#endif
#ifdef FPE_FLTDIV
case FPE_FLTDIV:
stack->rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
break;
#endif
#ifdef FPE_FLTOVF
case FPE_FLTOVF:
stack->rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
break;
#endif
#ifdef FPE_FLTUND
case FPE_FLTUND:
stack->rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
break;
#endif
#ifdef FPE_FLTRES
case FPE_FLTRES:
stack->rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
break;
#endif
#ifdef FPE_FLTINV
case FPE_FLTINV:
#endif
default:
stack->rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
break;
}
setup_raise_exception( sigcontext, stack );
}
/**********************************************************************
* int_handler
*
* Handler for SIGINT.
*/
static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
if (!dispatch_signal(SIGINT))
{
struct stack_layout *stack = setup_exception( sigcontext );
stack->rec.ExceptionCode = CONTROL_C_EXIT;
setup_raise_exception( sigcontext, stack );
}
}
/**********************************************************************
* abrt_handler
*
* Handler for SIGABRT.
*/
static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
struct stack_layout *stack = setup_exception( sigcontext );
stack->rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
stack->rec.ExceptionFlags = EH_NONCONTINUABLE;
setup_raise_exception( sigcontext, stack );
}
/**********************************************************************
* quit_handler
*
* Handler for SIGQUIT.
*/
static void quit_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
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 *sigcontext )
{
CONTEXT context;
save_context( &context, sigcontext );
wait_suspend( &context );
restore_context( &context, sigcontext );
}
/**********************************************************************
* usr2_handler
*
* Handler for SIGUSR2, used to set a thread context.
*/
static void usr2_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
CONTEXT *context = interlocked_xchg_ptr( (void **)&arm64_thread_data()->context, NULL );
if (!context) return;
if ((context->ContextFlags & ~CONTEXT_ARM64) & CONTEXT_FLOATING_POINT)
restore_fpu( context, sigcontext );
restore_context( context, sigcontext );
}
/***********************************************************************
* __wine_set_signal_handler (NTDLL.@)
*/
int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
{
if (sig >= ARRAY_SIZE(handlers)) return -1;
if (handlers[sig] != NULL) return -2;
handlers[sig] = wsh;
return 0;
}
/**********************************************************************
* signal_alloc_thread
*/
NTSTATUS signal_alloc_thread( TEB **teb )
{
SIZE_T size;
NTSTATUS status;
size = teb_size + max( MINSIGSTKSZ, 8192 );
*teb = NULL;
if (!(status = virtual_alloc_aligned( (void **)teb, 0, &size, MEM_COMMIT | MEM_TOP_DOWN,
PAGE_READWRITE, 13 )))
{
(*teb)->Tib.Self = &(*teb)->Tib;
(*teb)->Tib.ExceptionList = (void *)~0UL;
}
return status;
}
/**********************************************************************
* signal_free_thread
*/
void signal_free_thread( TEB *teb )
{
SIZE_T size = 0;
NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
}
/**********************************************************************
* signal_init_thread
*/
void signal_init_thread( TEB *teb )
{
static BOOL init_done;
stack_t ss;
if (!init_done)
{
pthread_key_create( &teb_key, NULL );
init_done = TRUE;
}
ss.ss_sp = (char *)teb + teb_size;
ss.ss_size = signal_stack_size;
ss.ss_flags = 0;
if (sigaltstack( &ss, NULL ) == -1) perror( "sigaltstack" );
/* Win64/ARM applications expect the TEB pointer to be in the x18 platform register. */
__asm__ __volatile__( "mov x18, %0" : : "r" (teb) );
pthread_setspecific( teb_key, teb );
}
/**********************************************************************
* signal_init_process
*/
void signal_init_process(void)
{
struct sigaction sig_act;
sig_act.sa_mask = server_block_set;
sig_act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
sig_act.sa_sigaction = int_handler;
if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = fpe_handler;
if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = abrt_handler;
if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = quit_handler;
if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = usr1_handler;
if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = usr2_handler;
if (sigaction( SIGUSR2, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = segv_handler;
if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
#ifdef SIGBUS
if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
#endif
#ifdef SIGTRAP
sig_act.sa_sigaction = trap_handler;
if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
#endif
return;
error:
perror("sigaction");
exit(1);
}
/***********************************************************************
* Definitions for Win32 unwind tables
*/
struct unwind_info
{
DWORD function_length : 18;
DWORD version : 2;
DWORD x : 1;
DWORD e : 1;
DWORD epilog : 5;
DWORD codes : 5;
};
struct unwind_info_ext
{
WORD epilog;
BYTE codes;
BYTE reserved;
};
struct unwind_info_epilog
{
DWORD offset : 18;
DWORD res : 4;
DWORD index : 10;
};
static const BYTE unwind_code_len[256] =
{
/* 00 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
/* 20 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
/* 40 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
/* 60 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
/* 80 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
/* a0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
/* c0 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
/* e0 */ 4,1,2,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
};
/***********************************************************************
* get_sequence_len
*/
static unsigned int get_sequence_len( BYTE *ptr, BYTE *end )
{
unsigned int ret = 0;
while (ptr < end)
{
if (*ptr == 0xe4 || *ptr == 0xe5) break;
ptr += unwind_code_len[*ptr];
ret++;
}
return ret;
}
/***********************************************************************
* restore_regs
*/
static void restore_regs( int reg, int count, int pos, CONTEXT *context,
KNONVOLATILE_CONTEXT_POINTERS *ptrs )
{
int i, offset = max( 0, pos );
for (i = 0; i < count; i++)
{
if (ptrs && reg + i >= 19) (&ptrs->X19)[reg + i - 19] = (DWORD64 *)context->Sp + i + offset;
context->u.X[reg + i] = ((DWORD64 *)context->Sp)[i + offset];
}
if (pos < 0) context->Sp += -8 * pos;
}
/***********************************************************************
* restore_fpregs
*/
static void restore_fpregs( int reg, int count, int pos, CONTEXT *context,
KNONVOLATILE_CONTEXT_POINTERS *ptrs )
{
int i, offset = max( 0, pos );
for (i = 0; i < count; i++)
{
if (ptrs && reg + i >= 8) (&ptrs->D8)[reg + i - 8] = (DWORD64 *)context->Sp + i + offset;
context->V[reg + i].D[0] = ((double *)context->Sp)[i + offset];
}
if (pos < 0) context->Sp += -8 * pos;
}
/***********************************************************************
* process_unwind_codes
*/
static void process_unwind_codes( BYTE *ptr, BYTE *end, CONTEXT *context,
KNONVOLATILE_CONTEXT_POINTERS *ptrs, int skip )
{
unsigned int val, len, save_next = 2;
/* skip codes */
while (ptr < end && skip)
{
if (*ptr == 0xe4 || *ptr == 0xe5) break;
ptr += unwind_code_len[*ptr];
skip--;
}
while (ptr < end)
{
if ((len = unwind_code_len[*ptr]) > 1)
{
if (ptr + len > end) break;
val = ptr[0] * 0x100 + ptr[1];
}
else val = *ptr;
if (*ptr < 0x20) /* alloc_s */
context->Sp += 16 * (val & 0x1f);
else if (*ptr < 0x40) /* save_r19r20_x */
restore_regs( 19, save_next, -(val & 0x1f), context, ptrs );
else if (*ptr < 0x80) /* save_fplr */
restore_regs( 29, 2, val & 0x3f, context, ptrs );
else if (*ptr < 0xc0) /* save_fplr_x */
restore_regs( 29, 2, -(val & 0x3f) - 1, context, ptrs );
else if (*ptr < 0xc8) /* alloc_m */
context->Sp += 16 * (val & 0x7ff);
else if (*ptr < 0xcc) /* save_regp */
restore_regs( 19 + ((val >> 6) & 0xf), save_next, val & 0x3f, context, ptrs );
else if (*ptr < 0xd0) /* save_regp_x */
restore_regs( 19 + ((val >> 6) & 0xf), save_next, -(val & 0x3f) - 1, context, ptrs );
else if (*ptr < 0xd4) /* save_reg */
restore_regs( 19 + ((val >> 6) & 0xf), 1, val & 0x3f, context, ptrs );
else if (*ptr < 0xd6) /* save_reg_x */
restore_regs( 19 + ((val >> 5) & 0xf), 1, -(val & 0x1f) - 1, context, ptrs );
else if (*ptr < 0xd8) /* save_lrpair */
restore_regs( 19 + ((val >> 6) & 0x7), 2, val & 0x3f, context, ptrs );
else if (*ptr < 0xda) /* save_fregp */
restore_fpregs( 8 + ((val >> 6) & 0x7), save_next, val & 0x3f, context, ptrs );
else if (*ptr < 0xdc) /* save_fregp_x */
restore_fpregs( 8 + ((val >> 6) & 0x7), save_next, -(val & 0x3f) - 1, context, ptrs );
else if (*ptr < 0xde) /* save_freg */
restore_fpregs( 8 + ((val >> 6) & 0x7), 1, val & 0x3f, context, ptrs );
else if (*ptr == 0xde) /* save_freg_x */
restore_fpregs( 8 + ((val >> 5) & 0x7), 1, -(val & 0x3f) - 1, context, ptrs );
else if (*ptr == 0xe0) /* alloc_l */
context->Sp += 16 * ((ptr[1] << 16) + (ptr[2] << 8) + ptr[3]);
else if (*ptr == 0xe1) /* set_fp */
context->Sp = context->u.s.Fp;
else if (*ptr == 0xe2) /* add_fp */
context->Sp = context->u.s.Fp - 8 * (val & 0xff);
else if (*ptr == 0xe3) /* nop */
/* nop */ ;
else if (*ptr == 0xe4) /* end */
break;
else if (*ptr == 0xe5) /* end_c */
break;
else if (*ptr == 0xe6) /* save_next */
{
save_next += 2;
ptr += len;
continue;
}
else
{
WARN( "unsupported code %02x\n", *ptr );
return;
}
save_next = 2;
ptr += len;
}
}
/***********************************************************************
* unwind_packed_data
*/
static void *unwind_packed_data( ULONG_PTR base, ULONG_PTR pc, RUNTIME_FUNCTION *func,
CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ptrs )
{
unsigned int i, len, offset, skip = 0;
unsigned int int_size = func->u.s.RegI * 8, fp_size = func->u.s.RegF * 8, regsave, local_size;
TRACE( "function %lx-%lx: len=%#x flag=%x regF=%u regI=%u H=%u CR=%u frame=%x\n",
base + func->BeginAddress, base + func->BeginAddress + func->u.s.FunctionLength * 4,
func->u.s.FunctionLength, func->u.s.Flag, func->u.s.RegF, func->u.s.RegI,
func->u.s.H, func->u.s.CR, func->u.s.FrameSize );
if (func->u.s.CR == 1) int_size += 8;
if (func->u.s.RegF) fp_size += 8;
regsave = ((int_size + fp_size + 8 * 8 * func->u.s.H) + 0xf) & ~0xf;
local_size = func->u.s.FrameSize * 16 - regsave;
/* check for prolog/epilog */
if (func->u.s.Flag == 1)
{
offset = ((pc - base) - func->BeginAddress) / 4;
if (offset < 17 || offset >= func->u.s.FunctionLength - 15)
{
len = (int_size + 8) / 16 + (fp_size + 8) / 16;
switch (func->u.s.CR)
{
case 3:
len++; /* stp x29,lr,[sp,0] */
if (local_size <= 512) break;
/* fall through */
case 0:
case 1:
if (local_size) len++; /* sub sp,sp,#local_size */
if (local_size > 4088) len++; /* sub sp,sp,#4088 */
break;
}
if (offset < len + 4 * func->u.s.H) /* prolog */
{
skip = len + 4 * func->u.s.H - offset;
}
else if (offset >= func->u.s.FunctionLength - (len + 1)) /* epilog */
{
skip = offset - (func->u.s.FunctionLength - (len + 1));
}
}
}
if (!skip)
{
if (func->u.s.CR == 3) restore_regs( 29, 2, 0, context, ptrs );
context->Sp += local_size;
if (fp_size) restore_fpregs( 8, fp_size / 8, int_size, context, ptrs );
if (func->u.s.CR == 1) restore_regs( 30, 1, int_size - 8, context, ptrs );
restore_regs( 19, func->u.s.RegI, -regsave, context, ptrs );
}
else
{
unsigned int pos = 0;
switch (func->u.s.CR)
{
case 3:
if (local_size <= 512)
{
/* stp x29,lr,[sp,-#local_size]! */
if (pos++ > skip) restore_regs( 29, 2, -local_size, context, ptrs );
break;
}
/* stp x29,lr,[sp,0] */
if (pos++ > skip) restore_regs( 29, 2, 0, context, ptrs );
/* fall through */
case 0:
case 1:
if (!local_size) break;
/* sub sp,sp,#local_size */
if (pos++ > skip) context->Sp += (local_size - 1) % 4088 + 1;
if (local_size > 4088 && pos++ > skip) context->Sp += 4088;
break;
}
if (func->u.s.H && offset < len + 4) pos += 4;
if (fp_size)
{
if (func->u.s.RegF % 2 == 0 && pos++ > skip)
/* str d%u,[sp,#fp_size] */
restore_fpregs( 8 + func->u.s.RegF, 1, int_size + fp_size - 8, context, ptrs );
for (i = func->u.s.RegF / 2 - 1; i >= 0; i--)
{
if (pos++ <= skip) continue;
if (!i && !int_size)
/* stp d8,d9,[sp,-#regsave]! */
restore_fpregs( 8, 2, -regsave, context, ptrs );
else
/* stp dn,dn+1,[sp,#offset] */
restore_fpregs( 8 + 2 * i, 2, int_size + 16 * i, context, ptrs );
}
}
if (pos++ > skip)
{
if (func->u.s.RegI % 2)
{
/* stp xn,lr,[sp,#offset] */
if (func->u.s.CR == 1) restore_regs( 30, 1, int_size - 8, context, ptrs );
/* str xn,[sp,#offset] */
restore_regs( 18 + func->u.s.RegI, 1,
(func->u.s.RegI > 1) ? 8 * func->u.s.RegI - 8 : -regsave,
context, ptrs );
}
else if (func->u.s.CR == 1)
/* str lr,[sp,#offset] */
restore_regs( 30, 1, func->u.s.RegI ? int_size - 8 : -regsave, context, ptrs );
}
for (i = func->u.s.RegI / 2 - 1; i >= 0; i--)
{
if (pos++ <= skip) continue;
if (i)
/* stp xn,xn+1,[sp,#offset] */
restore_regs( 19 + 2 * i, 2, 16 * i, context, ptrs );
else
/* stp x19,x20,[sp,-#regsave]! */
restore_regs( 19, 2, -regsave, context, ptrs );
}
}
return NULL;
}
/***********************************************************************
* unwind_full_data
*/
static void *unwind_full_data( ULONG_PTR base, ULONG_PTR pc, RUNTIME_FUNCTION *func,
CONTEXT *context, PVOID *handler_data, KNONVOLATILE_CONTEXT_POINTERS *ptrs )
{
struct unwind_info *info;
struct unwind_info_epilog *info_epilog;
unsigned int i, codes, epilogs, len, offset;
void *data;
BYTE *end;
info = (struct unwind_info *)((char *)base + func->u.UnwindData);
data = info + 1;
epilogs = info->epilog;
codes = info->codes;
if (!codes && !epilogs)
{
struct unwind_info_ext *infoex = data;
codes = infoex->codes;
epilogs = infoex->epilog;
data = infoex + 1;
}
info_epilog = data;
if (!info->e) data = info_epilog + epilogs;
offset = ((pc - base) - func->BeginAddress) / 4;
end = (BYTE *)data + codes * 4;
TRACE( "function %lx-%lx: len=%#x ver=%u X=%u E=%u epilogs=%u codes=%u\n",
base + func->BeginAddress, base + func->BeginAddress + info->function_length * 4,
info->function_length, info->version, info->x, info->e, epilogs, codes * 4 );
/* check for prolog */
if (offset < codes * 4)
{
len = get_sequence_len( data, end );
if (offset < len)
{
process_unwind_codes( data, end, context, ptrs, len - offset );
return NULL;
}
}
/* check for epilog */
if (!info->e)
{
for (i = 0; i < epilogs; i++)
{
if (offset < info_epilog[i].offset) break;
if (offset - info_epilog[i].offset < codes * 4 - info_epilog[i].index)
{
BYTE *ptr = (BYTE *)data + info_epilog[i].index;
len = get_sequence_len( ptr, end );
if (offset <= info_epilog[i].offset + len)
{
process_unwind_codes( ptr, end, context, ptrs, offset - info_epilog[i].offset );
return NULL;
}
}
}
}
else if (info->function_length - offset <= codes * 4 - epilogs)
{
BYTE *ptr = (BYTE *)data + epilogs;
len = get_sequence_len( ptr, end ) + 1;
if (offset >= info->function_length - len)
{
process_unwind_codes( ptr, end, context, ptrs, offset - (info->function_length - len) );
return NULL;
}
}
process_unwind_codes( data, end, context, ptrs, 0 );
/* get handler since we are inside the main code */
if (info->x)
{
DWORD *handler_rva = (DWORD *)data + codes;
*handler_data = handler_rva + 1;
return (char *)base + *handler_rva;
}
return NULL;
}
/**********************************************************************
* RtlVirtualUnwind (NTDLL.@)
*/
PVOID WINAPI RtlVirtualUnwind( ULONG type, ULONG_PTR base, ULONG_PTR pc,
RUNTIME_FUNCTION *func, CONTEXT *context,
PVOID *handler_data, ULONG_PTR *frame_ret,
KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
{
void *handler;
TRACE( "type %x pc %lx sp %lx func %lx\n", type, pc, context->Sp, base + func->BeginAddress );
if (func->u.s.Flag)
handler = unwind_packed_data( base, pc, func, context, ctx_ptr );
else
handler = unwind_full_data( base, pc, func, context, handler_data, ctx_ptr );
TRACE( "ret: lr=%lx sp=%lx handler=%p\n", context->u.s.Lr, context->Sp, handler );
context->Pc = context->u.s.Lr;
*frame_ret = context->Sp;
return handler;
}
/*******************************************************************
* RtlUnwindEx (NTDLL.@)
*/
void WINAPI RtlUnwindEx( PVOID end_frame, PVOID target_ip, EXCEPTION_RECORD *rec,
PVOID retval, CONTEXT *context, UNWIND_HISTORY_TABLE *table )
{
EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
EXCEPTION_RECORD record;
DISPATCHER_CONTEXT dispatch;
CONTEXT new_context;
NTSTATUS status;
DWORD i;
RtlCaptureContext( context );
new_context = *context;
/* build an exception record, if we do not have one */
if (!rec)
{
record.ExceptionCode = STATUS_UNWIND;
record.ExceptionFlags = 0;
record.ExceptionRecord = NULL;
record.ExceptionAddress = (void *)context->Pc;
record.NumberParameters = 0;
rec = &record;
}
rec->ExceptionFlags |= EH_UNWINDING | (end_frame ? 0 : EH_EXIT_UNWIND);
TRACE( "code=%x flags=%x end_frame=%p target_ip=%p pc=%016lx\n",
rec->ExceptionCode, rec->ExceptionFlags, end_frame, target_ip, context->Pc );
for (i = 0; i < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); i++)
TRACE( " info[%d]=%016lx\n", i, rec->ExceptionInformation[i] );
TRACE(" x0=%016lx x1=%016lx x2=%016lx x3=%016lx\n",
context->u.s.X0, context->u.s.X1, context->u.s.X2, context->u.s.X3 );
TRACE(" x4=%016lx x5=%016lx x6=%016lx x7=%016lx\n",
context->u.s.X4, context->u.s.X5, context->u.s.X6, context->u.s.X7 );
TRACE(" x8=%016lx x9=%016lx x10=%016lx x11=%016lx\n",
context->u.s.X8, context->u.s.X9, context->u.s.X10, context->u.s.X11 );
TRACE(" x12=%016lx x13=%016lx x14=%016lx x15=%016lx\n",
context->u.s.X12, context->u.s.X13, context->u.s.X14, context->u.s.X15 );
TRACE(" x16=%016lx x17=%016lx x18=%016lx x19=%016lx\n",
context->u.s.X16, context->u.s.X17, context->u.s.X18, context->u.s.X19 );
TRACE(" x20=%016lx x21=%016lx x22=%016lx x23=%016lx\n",
context->u.s.X20, context->u.s.X21, context->u.s.X22, context->u.s.X23 );
TRACE(" x24=%016lx x25=%016lx x26=%016lx x27=%016lx\n",
context->u.s.X24, context->u.s.X25, context->u.s.X26, context->u.s.X27 );
TRACE(" x28=%016lx fp=%016lx lr=%016lx sp=%016lx\n",
context->u.s.X28, context->u.s.Fp, context->u.s.Lr, context->Sp );
dispatch.TargetPc = (ULONG64)target_ip;
dispatch.ContextRecord = context;
dispatch.HistoryTable = table;
dispatch.NonVolatileRegisters = (BYTE *)&context->u.s.X19;
for (;;)
{
status = virtual_unwind( UNW_FLAG_UHANDLER, &dispatch, &new_context );
if (status != STATUS_SUCCESS) raise_status( status, rec );
unwind_done:
if (!dispatch.EstablisherFrame) break;
if (is_inside_signal_stack( (void *)dispatch.EstablisherFrame ))
{
TRACE( "frame %lx is inside signal stack (%p-%p)\n", dispatch.EstablisherFrame,
get_signal_stack(), (char *)get_signal_stack() + signal_stack_size );
*context = new_context;
continue;
}
if (!is_valid_frame( dispatch.EstablisherFrame ))
{
ERR( "invalid frame %lx (%p-%p)\n", dispatch.EstablisherFrame,
NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
rec->ExceptionFlags |= EH_STACK_INVALID;
break;
}
if (dispatch.LanguageHandler)
{
if (end_frame && (dispatch.EstablisherFrame > (ULONG64)end_frame))
{
ERR( "invalid end frame %lx/%p\n", dispatch.EstablisherFrame, end_frame );
raise_status( STATUS_INVALID_UNWIND_TARGET, rec );
}
if (dispatch.EstablisherFrame == (ULONG64)end_frame) rec->ExceptionFlags |= EH_TARGET_UNWIND;
if (call_unwind_handler( rec, &dispatch ) == ExceptionCollidedUnwind)
{
ULONG64 frame;
*context = new_context = *dispatch.ContextRecord;
dispatch.ContextRecord = context;
RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
dispatch.ControlPc, dispatch.FunctionEntry,
&new_context, NULL, &frame, NULL );
rec->ExceptionFlags |= EH_COLLIDED_UNWIND;
goto unwind_done;
}
rec->ExceptionFlags &= ~EH_COLLIDED_UNWIND;
}
else /* hack: call builtin handlers registered in the tib list */
{
DWORD64 backup_frame = dispatch.EstablisherFrame;
while ((ULONG64)teb_frame < new_context.Sp && (ULONG64)teb_frame < (ULONG64)end_frame)
{
TRACE( "found builtin frame %p handler %p\n", teb_frame, teb_frame->Handler );
dispatch.EstablisherFrame = (ULONG64)teb_frame;
if (call_teb_unwind_handler( rec, &dispatch, teb_frame ) == ExceptionCollidedUnwind)
{
ULONG64 frame;
teb_frame = __wine_pop_frame( teb_frame );
*context = new_context = *dispatch.ContextRecord;
dispatch.ContextRecord = context;
RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
dispatch.ControlPc, dispatch.FunctionEntry,
&new_context, NULL, &frame, NULL );
rec->ExceptionFlags |= EH_COLLIDED_UNWIND;
goto unwind_done;
}
teb_frame = __wine_pop_frame( teb_frame );
}
if ((ULONG64)teb_frame == (ULONG64)end_frame && (ULONG64)end_frame < new_context.Sp) break;
dispatch.EstablisherFrame = backup_frame;
}
if (dispatch.EstablisherFrame == (ULONG64)end_frame) break;
*context = new_context;
}
context->u.s.X0 = (ULONG64)retval;
context->Pc = (ULONG64)target_ip;
set_cpu_context( context );
}
/***********************************************************************
* RtlUnwind (NTDLL.@)
*/
void WINAPI RtlUnwind( void *frame, void *target_ip, EXCEPTION_RECORD *rec, void *retval )
{
CONTEXT context;
RtlUnwindEx( frame, target_ip, rec, retval, &context, NULL );
}
/*******************************************************************
* NtRaiseException (NTDLL.@)
*/
NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
{
if (first_chance)
{
NTSTATUS status = send_debug_event( rec, TRUE, context );
if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
NtSetContextThread( GetCurrentThread(), context );
}
return raise_exception( rec, context, first_chance );
}
/***********************************************************************
* RtlRaiseException (NTDLL.@)
*/
void WINAPI RtlRaiseException( EXCEPTION_RECORD *rec )
{
CONTEXT context;
RtlCaptureContext( &context );
rec->ExceptionAddress = (LPVOID)context.Pc;
RtlRaiseStatus( NtRaiseException( rec, &context, TRUE ));
}
/*************************************************************************
* RtlCaptureStackBackTrace (NTDLL.@)
*/
USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
{
FIXME( "(%d, %d, %p, %p) stub!\n", skip, count, buffer, hash );
return 0;
}
/***********************************************************************
* call_thread_entry_point
*/
static void WINAPI call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void *arg )
{
__TRY
{
TRACE_(relay)( "\1Starting thread proc %p (arg=%p)\n", entry, arg );
RtlExitUserThread( entry( arg ));
}
__EXCEPT(call_unhandled_exception_filter)
{
NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
}
__ENDTRY
abort(); /* should not be reached */
}
extern void DECLSPEC_NORETURN start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend,
void *relay, TEB *teb );
__ASM_GLOBAL_FUNC( start_thread,
"stp x29, x30, [sp,#-16]!\n\t"
"mov x18, x4\n\t" /* teb */
/* store exit frame */
"mov x29, sp\n\t"
"str x29, [x4, #0x300]\n\t" /* arm64_thread_data()->exit_frame */
/* switch to thread stack */
"ldr x5, [x4, #8]\n\t" /* teb->Tib.StackBase */
"sub sp, x5, #0x1000\n\t"
/* attach dlls */
"bl " __ASM_NAME("attach_thread") "\n\t"
"mov sp, x0\n\t"
/* clear the stack */
"and x0, x0, #~0xfff\n\t" /* round down to page size */
"bl " __ASM_NAME("virtual_clear_thread_stack") "\n\t"
/* switch to the initial context */
"mov x0, sp\n\t"
"ldp x1, x2, [x0, #0x10]\n\t" /* context->X1,2 */
"ldp x3, x4, [x0, #0x20]\n\t" /* context->X3,4 */
"ldp x5, x6, [x0, #0x30]\n\t" /* context->X5,6 */
"ldp x7, x8, [x0, #0x40]\n\t" /* context->X7,8 */
"ldp x9, x10, [x0, #0x50]\n\t" /* context->X9,10 */
"ldp x11, x12, [x0, #0x60]\n\t" /* context->X11,12 */
"ldp x13, x14, [x0, #0x70]\n\t" /* context->X13,14 */
"ldp x15, x16, [x0, #0x80]\n\t" /* context->X15,16 */
"ldp x17, x18, [x0, #0x90]\n\t" /* context->X17,18 */
"ldp x19, x20, [x0, #0xa0]\n\t" /* context->X19,20 */
"ldp x21, x22, [x0, #0xb0]\n\t" /* context->X21,22 */
"ldp x23, x24, [x0, #0xc0]\n\t" /* context->X23,24 */
"ldp x25, x26, [x0, #0xd0]\n\t" /* context->X25,26 */
"ldp x27, x28, [x0, #0xe0]\n\t" /* context->X27,28 */
"ldp x29, x30, [x0, #0xf0]\n\t" /* context->Fp,Lr */
"ldr x17, [x0, #0x100]\n\t" /* context->Sp */
"mov sp, x17\n\t"
"ldr x17, [x0, #0x108]\n\t" /* context->Pc */
"ldr x0, [x0, #0x8]\n\t" /* context->X0 */
"br x17" )
extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), TEB *teb );
__ASM_GLOBAL_FUNC( call_thread_exit_func,
"ldr x3, [x2, #0x300]\n\t" /* arm64_thread_data()->exit_frame */
"str xzr, [x2, #0x300]\n\t"
"cbz x3, 1f\n\t"
"mov sp, x3\n"
"1:\tblr x1" )
/***********************************************************************
* init_thread_context
*/
static void init_thread_context( CONTEXT *context, LPTHREAD_START_ROUTINE entry, void *arg, void *relay )
{
context->u.s.X0 = (DWORD64)entry;
context->u.s.X1 = (DWORD64)arg;
context->u.s.X18 = (DWORD64)NtCurrentTeb();
context->Sp = (DWORD64)NtCurrentTeb()->Tib.StackBase;
context->Pc = (DWORD64)relay;
}
/***********************************************************************
* attach_thread
*/
PCONTEXT DECLSPEC_HIDDEN attach_thread( LPTHREAD_START_ROUTINE entry, void *arg,
BOOL suspend, void *relay )
{
CONTEXT *ctx;
if (suspend)
{
CONTEXT context = { CONTEXT_ALL };
init_thread_context( &context, entry, arg, relay );
wait_suspend( &context );
ctx = (CONTEXT *)((ULONG_PTR)context.Sp & ~15) - 1;
*ctx = context;
}
else
{
ctx = (CONTEXT *)NtCurrentTeb()->Tib.StackBase - 1;
init_thread_context( ctx, entry, arg, relay );
}
ctx->ContextFlags = CONTEXT_FULL;
LdrInitializeThunk( ctx, (void **)&ctx->u.s.X0, 0, 0 );
return ctx;
}
/***********************************************************************
* signal_start_thread
*
* Thread startup sequence:
* signal_start_thread()
* -> start_thread()
* -> call_thread_func()
*/
void signal_start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend )
{
start_thread( entry, arg, suspend, call_thread_entry_point, NtCurrentTeb() );
}
/**********************************************************************
* signal_start_process
*
* Process startup sequence:
* signal_start_process()
* -> start_thread()
* -> kernel32_start_process()
*/
void signal_start_process( LPTHREAD_START_ROUTINE entry, BOOL suspend )
{
start_thread( entry, NtCurrentTeb()->Peb, suspend, kernel32_start_process, NtCurrentTeb() );
}
/***********************************************************************
* signal_exit_thread
*/
void signal_exit_thread( int status )
{
call_thread_exit_func( status, exit_thread, NtCurrentTeb() );
}
/***********************************************************************
* signal_exit_process
*/
void signal_exit_process( int status )
{
call_thread_exit_func( status, exit, NtCurrentTeb() );
}
/**********************************************************************
* DbgBreakPoint (NTDLL.@)
*/
__ASM_STDCALL_FUNC( DbgBreakPoint, 0, "brk #0; ret")
/**********************************************************************
* DbgUserBreakPoint (NTDLL.@)
*/
__ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "brk #0; ret")
/**********************************************************************
* NtCurrentTeb (NTDLL.@)
*/
TEB * WINAPI NtCurrentTeb(void)
{
return pthread_getspecific( teb_key );
}
#endif /* __aarch64__ */
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