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/*
* ARM signal handling routines
*
* Copyright 2002 Marcus Meissner, SuSE Linux AG
* Copyright 2010-2013, 2015 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 __arm__
#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
#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
#if defined(__ANDROID__) && !defined(HAVE_SYS_UCONTEXT_H)
typedef struct ucontext
{
unsigned long uc_flags;
struct ucontext *uc_link;
stack_t uc_stack;
struct sigcontext uc_mcontext;
sigset_t uc_sigmask;
unsigned long uc_regspace[128] __attribute__((__aligned__(8)));
} ucontext_t;
#endif
/* 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.arm_r##reg_num)
/* Special Registers access */
# define SP_sig(context) REG_sig(arm_sp, context) /* Stack pointer */
# define LR_sig(context) REG_sig(arm_lr, context) /* Link register */
# define PC_sig(context) REG_sig(arm_pc, context) /* Program counter */
# define CPSR_sig(context) REG_sig(arm_cpsr, context) /* Current State Register */
# define IP_sig(context) REG_sig(arm_ip, context) /* Intra-Procedure-call scratch register */
# define FP_sig(context) REG_sig(arm_fp, context) /* Frame pointer */
/* Exceptions */
# define ERROR_sig(context) REG_sig(error_code, context)
# define TRAP_sig(context) REG_sig(trap_no, context)
#elif defined(__FreeBSD__)
/* All Registers access - only for local access */
# define REGn_sig(reg_num, context) ((context)->uc_mcontext.__gregs[reg_num])
/* Special Registers access */
# define SP_sig(context) REGn_sig(_REG_SP, context) /* Stack pointer */
# define LR_sig(context) REGn_sig(_REG_LR, context) /* Link register */
# define PC_sig(context) REGn_sig(_REG_PC, context) /* Program counter */
# define CPSR_sig(context) REGn_sig(_REG_CPSR, context) /* Current State Register */
# define IP_sig(context) REGn_sig(_REG_R12, context) /* Intra-Procedure-call scratch register */
# define FP_sig(context) REGn_sig(_REG_FP, context) /* Frame pointer */
#endif /* linux */
enum arm_trap_code
{
TRAP_ARM_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
TRAP_ARM_PRIVINFLT = 6, /* Invalid opcode exception */
TRAP_ARM_PAGEFLT = 14, /* Page fault */
TRAP_ARM_ALIGNFLT = 17, /* Alignment check exception */
};
typedef void (WINAPI *raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context );
typedef int (*wine_signal_handler)(unsigned int sig);
static wine_signal_handler handlers[256];
struct UNWIND_INFO
{
WORD function_length;
WORD unknown1 : 7;
WORD count : 5;
WORD unknown2 : 4;
};
/***********************************************************************
* get_trap_code
*
* Get the trap code for a signal.
*/
static inline enum arm_trap_code get_trap_code( const ucontext_t *sigcontext )
{
#ifdef TRAP_sig
return TRAP_sig(sigcontext);
#else
return TRAP_ARM_UNKNOWN; /* unknown trap code */
#endif
}
/***********************************************************************
* get_error_code
*
* Get the error code for a signal.
*/
static inline WORD get_error_code( const ucontext_t *sigcontext )
{
#ifdef ERROR_sig
return ERROR_sig(sigcontext);
#else
return 0;
#endif
}
/***********************************************************************
* dispatch_signal
*/
static inline int dispatch_signal(unsigned int sig)
{
if (handlers[sig] == NULL) return 0;
return handlers[sig](sig);
}
/*******************************************************************
* is_valid_frame
*/
static inline BOOL is_valid_frame( void *frame )
{
if ((ULONG_PTR)frame & 3) return FALSE;
return (frame >= NtCurrentTeb()->Tib.StackLimit &&
(void **)frame < (void **)NtCurrentTeb()->Tib.StackBase - 1);
}
/***********************************************************************
* save_context
*
* Set the register values from a sigcontext.
*/
static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
{
#define C(x) context->R##x = REGn_sig(x,sigcontext)
/* Save normal registers */
C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
#undef C
context->ContextFlags = CONTEXT_FULL;
context->Sp = SP_sig(sigcontext); /* Stack pointer */
context->Lr = LR_sig(sigcontext); /* Link register */
context->Pc = PC_sig(sigcontext); /* Program Counter */
context->Cpsr = CPSR_sig(sigcontext); /* Current State Register */
context->R11 = FP_sig(sigcontext); /* Frame pointer */
context->R12 = IP_sig(sigcontext); /* Intra-Procedure-call scratch register */
}
/***********************************************************************
* restore_context
*
* Build a sigcontext from the register values.
*/
static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
{
#define C(x) REGn_sig(x,sigcontext) = context->R##x
/* Restore normal registers */
C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
#undef C
SP_sig(sigcontext) = context->Sp; /* Stack pointer */
LR_sig(sigcontext) = context->Lr ; /* Link register */
PC_sig(sigcontext) = context->Pc; /* Program Counter */
CPSR_sig(sigcontext) = context->Cpsr; /* Current State Register */
FP_sig(sigcontext) = context->R11; /* Frame pointer */
IP_sig(sigcontext) = context->R12; /* Intra-Procedure-call scratch register */
}
/***********************************************************************
* save_fpu
*
* Set the FPU context from a sigcontext.
*/
static inline void save_fpu( CONTEXT *context, const ucontext_t *sigcontext )
{
FIXME("not implemented\n");
}
/***********************************************************************
* restore_fpu
*
* Restore the FPU context to a sigcontext.
*/
static inline void restore_fpu( CONTEXT *context, const ucontext_t *sigcontext )
{
FIXME("not implemented\n");
}
/**************************************************************************
* __chkstk (NTDLL.@)
*
* Incoming r4 contains words to allocate, converting to bytes then return
*/
__ASM_GLOBAL_FUNC( __chkstk, "lsl r4, r4, #2\n\t"
"bx lr" )
/***********************************************************************
* RtlCaptureContext (NTDLL.@)
*/
/* FIXME: Use the Stack instead of the actual register values */
__ASM_STDCALL_FUNC( RtlCaptureContext, 4,
".arm\n\t"
"stmib r0, {r0-r12}\n\t" /* context->R0..R12 */
"mov r1, #0x0200000\n\t" /* CONTEXT_ARM */
"add r1, r1, #0x3\n\t" /* CONTEXT_FULL */
"str r1, [r0]\n\t" /* context->ContextFlags */
"str SP, [r0, #0x38]\n\t" /* context->Sp */
"str LR, [r0, #0x3c]\n\t" /* context->Lr */
"str PC, [r0, #0x40]\n\t" /* context->Pc */
"mrs r1, CPSR\n\t"
"str r1, [r0, #0x44]\n\t" /* context->Cpsr */
"bx lr"
)
/***********************************************************************
* set_cpu_context
*
* Set the new CPU context.
*/
void DECLSPEC_HIDDEN set_cpu_context( const CONTEXT *context );
__ASM_GLOBAL_FUNC( set_cpu_context,
".arm\n\t"
"ldr r1, [r0, #0x44]\n\t" /* context->Cpsr */
"msr CPSR_f, r1\n\t"
"ldr r1, [r0, #0x40]\n\t" /* context->Pc */
"ldr lr, [r0, #0x3c]\n\t" /* context->Lr */
"ldr sp, [r0, #0x38]\n\t" /* context->Sp */
"push {r1}\n\t"
"ldmib r0, {r0-r12}\n\t" /* context->R0..R12 */
"pop {pc}" )
/***********************************************************************
* 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_ARM; /* 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_ARM; /* get rid of CPU id */
if (flags & CONTEXT_CONTROL)
{
to->Sp = from->Sp;
to->Lr = from->Lr;
to->Pc = from->Pc;
to->Cpsr = from->Cpsr;
}
if (flags & CONTEXT_INTEGER)
{
to->R0 = from->R0;
to->R1 = from->R1;
to->R2 = from->R2;
to->R3 = from->R3;
to->R4 = from->R4;
to->R5 = from->R5;
to->R6 = from->R6;
to->R7 = from->R7;
to->R8 = from->R8;
to->R9 = from->R9;
to->R10 = from->R10;
to->R11 = from->R11;
to->R12 = from->R12;
}
if (flags & CONTEXT_FLOATING_POINT)
{
to->Fpscr = from->Fpscr;
memcpy( to->u.D, from->u.D, sizeof(to->u.D) );
}
}
/***********************************************************************
* 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_ARM; /* get rid of CPU id */
memset( to, 0, sizeof(*to) );
to->cpu = CPU_ARM;
if (flags & CONTEXT_CONTROL)
{
to->flags |= SERVER_CTX_CONTROL;
to->ctl.arm_regs.sp = from->Sp;
to->ctl.arm_regs.lr = from->Lr;
to->ctl.arm_regs.pc = from->Pc;
to->ctl.arm_regs.cpsr = from->Cpsr;
}
if (flags & CONTEXT_INTEGER)
{
to->flags |= SERVER_CTX_INTEGER;
to->integer.arm_regs.r[0] = from->R0;
to->integer.arm_regs.r[1] = from->R1;
to->integer.arm_regs.r[2] = from->R2;
to->integer.arm_regs.r[3] = from->R3;
to->integer.arm_regs.r[4] = from->R4;
to->integer.arm_regs.r[5] = from->R5;
to->integer.arm_regs.r[6] = from->R6;
to->integer.arm_regs.r[7] = from->R7;
to->integer.arm_regs.r[8] = from->R8;
to->integer.arm_regs.r[9] = from->R9;
to->integer.arm_regs.r[10] = from->R10;
to->integer.arm_regs.r[11] = from->R11;
to->integer.arm_regs.r[12] = from->R12;
}
if (flags & CONTEXT_FLOATING_POINT)
{
to->flags |= SERVER_CTX_FLOATING_POINT;
for (i = 0; i < 32; i++) to->fp.arm_regs.d[i] = from->u.D[i];
to->fp.arm_regs.fpscr = from->Fpscr;
}
if (flags & CONTEXT_DEBUG_REGISTERS)
{
to->flags |= SERVER_CTX_DEBUG_REGISTERS;
for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->debug.arm_regs.bvr[i] = from->Bvr[i];
for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->debug.arm_regs.bcr[i] = from->Bcr[i];
for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->debug.arm_regs.wvr[i] = from->Wvr[i];
for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->debug.arm_regs.wcr[i] = from->Wcr[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_ARM) return STATUS_INVALID_PARAMETER;
to->ContextFlags = CONTEXT_ARM;
if (from->flags & SERVER_CTX_CONTROL)
{
to->ContextFlags |= CONTEXT_CONTROL;
to->Sp = from->ctl.arm_regs.sp;
to->Lr = from->ctl.arm_regs.lr;
to->Pc = from->ctl.arm_regs.pc;
to->Cpsr = from->ctl.arm_regs.cpsr;
}
if (from->flags & SERVER_CTX_INTEGER)
{
to->ContextFlags |= CONTEXT_INTEGER;
to->R0 = from->integer.arm_regs.r[0];
to->R1 = from->integer.arm_regs.r[1];
to->R2 = from->integer.arm_regs.r[2];
to->R3 = from->integer.arm_regs.r[3];
to->R4 = from->integer.arm_regs.r[4];
to->R5 = from->integer.arm_regs.r[5];
to->R6 = from->integer.arm_regs.r[6];
to->R7 = from->integer.arm_regs.r[7];
to->R8 = from->integer.arm_regs.r[8];
to->R9 = from->integer.arm_regs.r[9];
to->R10 = from->integer.arm_regs.r[10];
to->R11 = from->integer.arm_regs.r[11];
to->R12 = from->integer.arm_regs.r[12];
}
if (from->flags & SERVER_CTX_FLOATING_POINT)
{
to->ContextFlags |= CONTEXT_FLOATING_POINT;
for (i = 0; i < 32; i++) to->u.D[i] = from->fp.arm_regs.d[i];
to->Fpscr = from->fp.arm_regs.fpscr;
}
if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
{
to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->Bvr[i] = from->debug.arm_regs.bvr[i];
for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->Bcr[i] = from->debug.arm_regs.bcr[i];
for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->Wvr[i] = from->debug.arm_regs.wvr[i];
for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->Wcr[i] = from->debug.arm_regs.wcr[i];
}
return STATUS_SUCCESS;
}
/***********************************************************************
* NtSetContextThread (NTDLL.@)
* ZwSetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
{
NTSTATUS ret;
BOOL 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;
}
extern void raise_func_trampoline_thumb( EXCEPTION_RECORD *rec, CONTEXT *context, raise_func func );
__ASM_GLOBAL_FUNC( raise_func_trampoline_thumb,
".thumb\n\t"
"blx r2\n\t"
"bkpt")
extern void raise_func_trampoline_arm( EXCEPTION_RECORD *rec, CONTEXT *context, raise_func func );
__ASM_GLOBAL_FUNC( raise_func_trampoline_arm,
".arm\n\t"
"blx r2\n\t"
"bkpt")
/***********************************************************************
* setup_exception_record
*
* Setup the exception record and context on the thread stack.
*/
static EXCEPTION_RECORD *setup_exception( ucontext_t *sigcontext, raise_func func )
{
struct stack_layout
{
CONTEXT context;
EXCEPTION_RECORD rec;
} *stack;
DWORD exception_code = 0;
stack = (struct stack_layout *)(SP_sig(sigcontext) & ~3);
stack--; /* push the stack_layout structure */
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 );
/* now modify the sigcontext to return to the raise function */
SP_sig(sigcontext) = (DWORD)stack;
if (CPSR_sig(sigcontext) & 0x20)
PC_sig(sigcontext) = (DWORD)raise_func_trampoline_thumb;
else
PC_sig(sigcontext) = (DWORD)raise_func_trampoline_arm;
REGn_sig(0, sigcontext) = (DWORD)&stack->rec; /* first arg for raise_func */
REGn_sig(1, sigcontext) = (DWORD)&stack->context; /* second arg for raise_func */
REGn_sig(2, sigcontext) = (DWORD)func; /* the raise_func as third arg for the trampoline */
return &stack->rec;
}
/**********************************************************************
* raise_segv_exception
*/
static void WINAPI raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
{
NTSTATUS status;
switch(rec->ExceptionCode)
{
case EXCEPTION_ACCESS_VIOLATION:
if (rec->NumberParameters == 2)
{
if (!(rec->ExceptionCode = virtual_handle_fault( (void *)rec->ExceptionInformation[1],
rec->ExceptionInformation[0], FALSE )))
goto done;
}
break;
}
status = NtRaiseException( rec, context, TRUE );
if (status) raise_status( status, rec );
done:
set_cpu_context( context );
}
/**********************************************************************
* call_stack_handlers
*
* Call the stack handlers chain.
*/
static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *context )
{
EXCEPTION_REGISTRATION_RECORD *frame, *dispatch, *nested_frame;
DWORD res;
frame = NtCurrentTeb()->Tib.ExceptionList;
nested_frame = NULL;
while (frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL)
{
/* Check frame address */
if (!is_valid_frame( frame ))
{
rec->ExceptionFlags |= EH_STACK_INVALID;
break;
}
/* Call handler */
TRACE( "calling handler at %p code=%x flags=%x\n",
frame->Handler, rec->ExceptionCode, rec->ExceptionFlags );
res = frame->Handler( rec, frame, context, &dispatch );
TRACE( "handler at %p returned %x\n", frame->Handler, res );
if (frame == nested_frame)
{
/* no longer nested */
nested_frame = NULL;
rec->ExceptionFlags &= ~EH_NESTED_CALL;
}
switch(res)
{
case ExceptionContinueExecution:
if (!(rec->ExceptionFlags & EH_NONCONTINUABLE)) return STATUS_SUCCESS;
return STATUS_NONCONTINUABLE_EXCEPTION;
case ExceptionContinueSearch:
break;
case ExceptionNestedException:
if (nested_frame < dispatch) nested_frame = dispatch;
rec->ExceptionFlags |= EH_NESTED_CALL;
break;
default:
return STATUS_INVALID_DISPOSITION;
}
frame = frame->Prev;
}
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=%08x tid=%04x\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
context->Pc, GetCurrentThreadId() );
for (c = 0; c < rec->NumberParameters; c++)
TRACE( " info[%d]=%08lx\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( " r0=%08x r1=%08x r2=%08x r3=%08x r4=%08x r5=%08x\n",
context->R0, context->R1, context->R2, context->R3, context->R4, context->R5 );
TRACE( " r6=%08x r7=%08x r8=%08x r9=%08x r10=%08x r11=%08x\n",
context->R6, context->R7, context->R8, context->R9, context->R10, context->R11 );
TRACE( " r12=%08x sp=%08x lr=%08x pc=%08x cpsr=%08x\n",
context->R12, context->Sp, context->Lr, context->Pc, context->Cpsr );
}
status = send_debug_event( rec, TRUE, context );
if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
return STATUS_SUCCESS;
if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION)
return STATUS_SUCCESS;
if ((status = call_stack_handlers( rec, context )) != 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 );
}
return STATUS_SUCCESS;
}
/**********************************************************************
* segv_handler
*
* Handler for SIGSEGV and related errors.
*/
static void segv_handler( int signal, siginfo_t *info, void *ucontext )
{
EXCEPTION_RECORD *rec;
ucontext_t *context = ucontext;
/* check for page fault inside the thread stack */
if (get_trap_code(context) == TRAP_ARM_PAGEFLT &&
(char *)info->si_addr >= (char *)NtCurrentTeb()->DeallocationStack &&
(char *)info->si_addr < (char *)NtCurrentTeb()->Tib.StackBase &&
virtual_handle_stack_fault( info->si_addr ))
{
/* check if this was the last guard page */
if ((char *)info->si_addr < (char *)NtCurrentTeb()->DeallocationStack + 2*4096)
{
rec = setup_exception( context, raise_segv_exception );
rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
}
return;
}
rec = setup_exception( context, raise_segv_exception );
if (rec->ExceptionCode == EXCEPTION_STACK_OVERFLOW) return;
switch(get_trap_code(context))
{
case TRAP_ARM_PRIVINFLT: /* Invalid opcode exception */
rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
case TRAP_ARM_PAGEFLT: /* Page fault */
rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
rec->NumberParameters = 2;
rec->ExceptionInformation[0] = (get_error_code(context) & 0x800) != 0;
rec->ExceptionInformation[1] = (ULONG_PTR)info->si_addr;
break;
case TRAP_ARM_ALIGNFLT: /* Alignment check exception */
rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
break;
case TRAP_ARM_UNKNOWN: /* Unknown fault code */
rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
rec->NumberParameters = 2;
rec->ExceptionInformation[0] = 0;
rec->ExceptionInformation[1] = 0xffffffff;
break;
default:
ERR("Got unexpected trap %d\n", get_trap_code(context));
rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
}
}
/**********************************************************************
* trap_handler
*
* Handler for SIGTRAP.
*/
static void trap_handler( int signal, siginfo_t *info, void *ucontext )
{
EXCEPTION_RECORD rec;
CONTEXT context;
NTSTATUS status;
switch ( info->si_code )
{
case TRAP_TRACE:
rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
break;
case TRAP_BRKPT:
default:
rec.ExceptionCode = EXCEPTION_BREAKPOINT;
break;
}
save_context( &context, ucontext );
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
rec.ExceptionRecord = NULL;
rec.ExceptionAddress = (LPVOID)context.Pc;
rec.NumberParameters = 0;
status = raise_exception( &rec, &context, TRUE );
if (status) raise_status( status, &rec );
restore_context( &context, ucontext );
}
/**********************************************************************
* fpe_handler
*
* Handler for SIGFPE.
*/
static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec;
CONTEXT context;
NTSTATUS status;
save_fpu( &context, sigcontext );
save_context( &context, sigcontext );
switch (siginfo->si_code & 0xffff )
{
#ifdef FPE_FLTSUB
case FPE_FLTSUB:
rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
break;
#endif
#ifdef FPE_INTDIV
case FPE_INTDIV:
rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
break;
#endif
#ifdef FPE_INTOVF
case FPE_INTOVF:
rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
break;
#endif
#ifdef FPE_FLTDIV
case FPE_FLTDIV:
rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
break;
#endif
#ifdef FPE_FLTOVF
case FPE_FLTOVF:
rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
break;
#endif
#ifdef FPE_FLTUND
case FPE_FLTUND:
rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
break;
#endif
#ifdef FPE_FLTRES
case FPE_FLTRES:
rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
break;
#endif
#ifdef FPE_FLTINV
case FPE_FLTINV:
#endif
default:
rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
break;
}
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
rec.ExceptionRecord = NULL;
rec.ExceptionAddress = (LPVOID)context.Pc;
rec.NumberParameters = 0;
status = raise_exception( &rec, &context, TRUE );
if (status) raise_status( status, &rec );
restore_context( &context, sigcontext );
restore_fpu( &context, sigcontext );
}
/**********************************************************************
* int_handler
*
* Handler for SIGINT.
*/
static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
if (!dispatch_signal(SIGINT))
{
EXCEPTION_RECORD rec;
CONTEXT context;
NTSTATUS status;
save_context( &context, sigcontext );
rec.ExceptionCode = CONTROL_C_EXIT;
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
rec.ExceptionRecord = NULL;
rec.ExceptionAddress = (LPVOID)context.Pc;
rec.NumberParameters = 0;
status = raise_exception( &rec, &context, TRUE );
if (status) raise_status( status, &rec );
restore_context( &context, sigcontext );
}
}
/**********************************************************************
* abrt_handler
*
* Handler for SIGABRT.
*/
static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec;
CONTEXT context;
NTSTATUS status;
save_context( &context, sigcontext );
rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
rec.ExceptionFlags = EH_NONCONTINUABLE;
rec.ExceptionRecord = NULL;
rec.ExceptionAddress = (LPVOID)context.Pc;
rec.NumberParameters = 0;
status = raise_exception( &rec, &context, TRUE );
if (status) raise_status( status, &rec );
restore_context( &context, sigcontext );
}
/**********************************************************************
* 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 );
}
/***********************************************************************
* __wine_set_signal_handler (NTDLL.@)
*/
int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
{
if (sig >= ARRAY_SIZE(handlers)) return -1;
if (handlers[sig] != NULL) return -2;
handlers[sig] = wsh;
return 0;
}
/**********************************************************************
* signal_alloc_thread
*/
NTSTATUS signal_alloc_thread( TEB **teb )
{
static size_t sigstack_zero_bits;
SIZE_T size;
NTSTATUS status;
if (!sigstack_zero_bits)
{
size_t min_size = page_size;
/* find the first power of two not smaller than min_size */
while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
assert( sizeof(TEB) <= min_size );
}
size = 1 << sigstack_zero_bits;
*teb = NULL;
if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), (void **)teb, sigstack_zero_bits,
&size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
{
(*teb)->Tib.Self = &(*teb)->Tib;
(*teb)->Tib.ExceptionList = (void *)~0UL;
}
return status;
}
/**********************************************************************
* signal_free_thread
*/
void signal_free_thread( TEB *teb )
{
SIZE_T size = 0;
NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
}
/**********************************************************************
* signal_init_thread
*/
void signal_init_thread( TEB *teb )
{
static BOOL init_done;
if (!init_done)
{
pthread_key_create( &teb_key, NULL );
init_done = TRUE;
}
#if defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_8A__)
/* Win32/ARM applications expect the TEB pointer to be in the TPIDRURW register. */
__asm__ __volatile__( "mcr p15, 0, %0, c13, c0, 2" : : "r" (teb) );
#endif
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;
sig_act.sa_sigaction = int_handler;
if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = fpe_handler;
if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = abrt_handler;
if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = quit_handler;
if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = usr1_handler;
if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = segv_handler;
if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
#ifdef SIGBUS
if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
#endif
#ifdef SIGTRAP
sig_act.sa_sigaction = trap_handler;
if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
#endif
return;
error:
perror("sigaction");
exit(1);
}
/**********************************************************************
* RtlAddFunctionTable (NTDLL.@)
*/
BOOLEAN CDECL RtlAddFunctionTable( RUNTIME_FUNCTION *table, DWORD count, DWORD addr )
{
FIXME( "%p %u %x: stub\n", table, count, addr );
return TRUE;
}
/*************************************************************************
* RtlAddGrowableFunctionTable (NTDLL.@)
*/
DWORD WINAPI RtlAddGrowableFunctionTable( void **table, RUNTIME_FUNCTION *functions, DWORD count, DWORD max_count,
ULONG_PTR base, ULONG_PTR end )
{
FIXME( "(%p, %p, %d, %d, %ld, %ld) stub!\n", table, functions, count, max_count, base, end );
if (table) *table = NULL;
return STATUS_SUCCESS;
}
/*************************************************************************
* RtlGrowFunctionTable (NTDLL.@)
*/
void WINAPI RtlGrowFunctionTable( void *table, DWORD count )
{
FIXME( "(%p, %d) stub!\n", table, count );
}
/*************************************************************************
* RtlDeleteGrowableFunctionTable (NTDLL.@)
*/
void WINAPI RtlDeleteGrowableFunctionTable( void *table )
{
FIXME( "(%p) stub!\n", table );
}
/**********************************************************************
* RtlDeleteFunctionTable (NTDLL.@)
*/
BOOLEAN CDECL RtlDeleteFunctionTable( RUNTIME_FUNCTION *table )
{
FIXME( "%p: stub\n", table );
return TRUE;
}
/**********************************************************************
* find_function_info
*/
static RUNTIME_FUNCTION *find_function_info( ULONG_PTR pc, HMODULE module,
RUNTIME_FUNCTION *func, ULONG size )
{
int min = 0;
int max = size/sizeof(*func) - 1;
while (min <= max)
{
int pos = (min + max) / 2;
DWORD begin = (func[pos].BeginAddress & ~1), end;
if (func[pos].u.s.Flag)
end = begin + func[pos].u.s.FunctionLength * 2;
else
{
struct UNWIND_INFO *info;
info = (struct UNWIND_INFO *)((char *)module + func[pos].u.UnwindData);
end = begin + info->function_length * 2;
}
if ((char *)pc < (char *)module + begin) max = pos - 1;
else if ((char *)pc >= (char *)module + end) min = pos + 1;
else return func + pos;
}
return NULL;
}
/**********************************************************************
* RtlLookupFunctionEntry (NTDLL.@)
*/
PRUNTIME_FUNCTION WINAPI RtlLookupFunctionEntry( ULONG_PTR pc, DWORD *base,
UNWIND_HISTORY_TABLE *table )
{
LDR_MODULE *module;
RUNTIME_FUNCTION *func;
ULONG size;
/* FIXME: should use the history table to make things faster */
if (LdrFindEntryForAddress( (void *)pc, &module ))
{
WARN( "module not found for %lx\n", pc );
return NULL;
}
if (!(func = RtlImageDirectoryEntryToData( module->BaseAddress, TRUE,
IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size )))
{
WARN( "no exception table found in module %p pc %lx\n", module->BaseAddress, pc );
return NULL;
}
func = find_function_info( pc, module->BaseAddress, func, size );
if (func) *base = (DWORD)module->BaseAddress;
return func;
}
/***********************************************************************
* RtlUnwind (NTDLL.@)
*/
void WINAPI RtlUnwind( void *endframe, void *target_ip, EXCEPTION_RECORD *rec, void *retval )
{
CONTEXT context;
EXCEPTION_RECORD record;
EXCEPTION_REGISTRATION_RECORD *frame, *dispatch;
DWORD res;
RtlCaptureContext( &context );
context.R0 = (DWORD)retval;
/* 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 | (endframe ? 0 : EH_EXIT_UNWIND);
TRACE( "code=%x flags=%x\n", rec->ExceptionCode, rec->ExceptionFlags );
/* get chain of exception frames */
frame = NtCurrentTeb()->Tib.ExceptionList;
while ((frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL) && (frame != endframe))
{
/* Check frame address */
if (endframe && ((void*)frame > endframe))
raise_status( STATUS_INVALID_UNWIND_TARGET, rec );
if (!is_valid_frame( frame )) raise_status( STATUS_BAD_STACK, rec );
/* Call handler */
TRACE( "calling handler at %p code=%x flags=%x\n",
frame->Handler, rec->ExceptionCode, rec->ExceptionFlags );
res = frame->Handler(rec, frame, &context, &dispatch);
TRACE( "handler at %p returned %x\n", frame->Handler, res );
switch(res)
{
case ExceptionContinueSearch:
break;
case ExceptionCollidedUnwind:
frame = dispatch;
break;
default:
raise_status( STATUS_INVALID_DISPOSITION, rec );
break;
}
frame = __wine_pop_frame( frame );
}
}
/*******************************************************************
* NtRaiseException (NTDLL.@)
*/
NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
{
NTSTATUS status = raise_exception( rec, context, first_chance );
if (status == STATUS_SUCCESS) NtSetContextThread( GetCurrentThread(), context );
return status;
}
/***********************************************************************
* RtlRaiseException (NTDLL.@)
*/
void WINAPI RtlRaiseException( EXCEPTION_RECORD *rec )
{
CONTEXT context;
NTSTATUS status;
RtlCaptureContext( &context );
rec->ExceptionAddress = (LPVOID)context.Pc;
status = raise_exception( rec, &context, TRUE );
if (status) raise_status( status, rec );
}
/*************************************************************************
* 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 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,
".arm\n\t"
"push {r4-r12,lr}\n\t"
/* store exit frame */
"ldr r4, [sp, #40]\n\t" /* teb */
"str sp, [r4, #0x1d4]\n\t" /* teb->SystemReserved2 */
/* switch to thread stack */
"ldr r4, [r4, #4]\n\t" /* teb->Tib.StackBase */
"sub sp, r4, #0x1000\n\t"
/* attach dlls */
"bl " __ASM_NAME("attach_thread") "\n\t"
"mov sp, r0\n\t"
/* clear the stack */
"and r0, #~0xff0\n\t" /* round down to page size */
"bl " __ASM_NAME("virtual_clear_thread_stack") "\n\t"
/* switch to the initial context */
"mov r0, sp\n\t"
"b " __ASM_NAME("set_cpu_context") )
extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), TEB *teb );
__ASM_GLOBAL_FUNC( call_thread_exit_func,
".arm\n\t"
"ldr r3, [r2, #0x1d4]\n\t" /* teb->SystemReserved2 */
"mov ip, #0\n\t"
"str ip, [r2, #0x1d4]\n\t"
"cmp r3, ip\n\t"
"movne sp, r3\n\t"
"blx r1" )
/***********************************************************************
* init_thread_context
*/
static void init_thread_context( CONTEXT *context, LPTHREAD_START_ROUTINE entry, void *arg, void *relay )
{
context->R0 = (DWORD)entry;
context->R1 = (DWORD)arg;
context->Sp = (DWORD)NtCurrentTeb()->Tib.StackBase;
context->Pc = (DWORD)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;
attach_dlls( ctx, (void **)&ctx->R0 );
return ctx;
}
/***********************************************************************
* signal_start_thread
*
* Thread startup sequence:
* signal_start_thread()
* -> thread_startup()
* -> call_thread_entry_point()
*/
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()
* -> thread_startup()
* -> 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.@)
*/
void WINAPI DbgBreakPoint(void)
{
kill(getpid(), SIGTRAP);
}
/**********************************************************************
* DbgUserBreakPoint (NTDLL.@)
*/
void WINAPI DbgUserBreakPoint(void)
{
kill(getpid(), SIGTRAP);
}
/**********************************************************************
* NtCurrentTeb (NTDLL.@)
*/
TEB * WINAPI NtCurrentTeb(void)
{
return pthread_getspecific( teb_key );
}
#endif /* __arm__ */
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