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

1139 lines
37 KiB
C

/*
* 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
*/
#if 0
#pragma makedep unix
#endif
#ifdef __arm__
#include "config.h"
#include <assert.h>
#include <pthread.h>
#include <signal.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#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 "winnt.h"
#include "winternl.h"
#include "wine/asm.h"
#include "unix_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(seh);
/***********************************************************************
* signal context platform-specific definitions
*/
#ifdef linux
#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)
struct extended_ctx
{
unsigned long magic;
unsigned long size;
};
struct vfp_sigframe
{
struct extended_ctx ctx;
unsigned long long fpregs[32];
unsigned long fpscr;
};
static void *get_extended_sigcontext( const ucontext_t *sigcontext, unsigned int magic )
{
struct extended_ctx *ctx = (struct extended_ctx *)sigcontext->uc_regspace;
while ((char *)ctx < (char *)(sigcontext + 1) && ctx->magic && ctx->size)
{
if (ctx->magic == magic) return ctx;
ctx = (struct extended_ctx *)((char *)ctx + ctx->size);
}
return NULL;
}
static void save_fpu( CONTEXT *context, const ucontext_t *sigcontext )
{
struct vfp_sigframe *frame = get_extended_sigcontext( sigcontext, 0x56465001 );
if (!frame) return;
memcpy( context->u.D, frame->fpregs, sizeof(context->u.D) );
context->Fpscr = frame->fpscr;
}
static void restore_fpu( const CONTEXT *context, ucontext_t *sigcontext )
{
struct vfp_sigframe *frame = get_extended_sigcontext( sigcontext, 0x56465001 );
if (!frame) return;
memcpy( frame->fpregs, context->u.D, sizeof(context->u.D) );
frame->fpscr = context->Fpscr;
}
#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 */
static void save_fpu( CONTEXT *context, const ucontext_t *sigcontext ) { }
static void restore_fpu( const CONTEXT *context, ucontext_t *sigcontext ) { }
#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 */
};
struct syscall_frame
{
DWORD r0; /* 000 */
DWORD r1; /* 004 */
DWORD r2; /* 008 */
DWORD r3; /* 00c */
DWORD r4; /* 010 */
DWORD r5; /* 014 */
DWORD r6; /* 018 */
DWORD r7; /* 01c */
DWORD r8; /* 020 */
DWORD r9; /* 024 */
DWORD r10; /* 028 */
DWORD r11; /* 02c */
DWORD r12; /* 030 */
DWORD pc; /* 034 */
DWORD sp; /* 038 */
DWORD lr; /* 03c */
DWORD cpsr; /* 040 */
DWORD restore_flags; /* 044 */
DWORD fpscr; /* 048 */
struct syscall_frame *prev_frame; /* 04c */
SYSTEM_SERVICE_TABLE *syscall_table; /* 050 */
DWORD align[3]; /* 054 */
ULONGLONG d[32]; /* 060 */
};
C_ASSERT( sizeof( struct syscall_frame ) == 0x160);
struct arm_thread_data
{
void *exit_frame; /* 1d4 exit frame pointer */
struct syscall_frame *syscall_frame; /* 1d8 frame pointer on syscall entry */
};
C_ASSERT( sizeof(struct arm_thread_data) <= sizeof(((struct ntdll_thread_data *)0)->cpu_data) );
C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct arm_thread_data, exit_frame ) == 0x1d4 );
C_ASSERT( offsetof( TEB, GdiTebBatch ) + offsetof( struct arm_thread_data, syscall_frame ) == 0x1d8 );
static inline struct arm_thread_data *arm_thread_data(void)
{
return (struct arm_thread_data *)ntdll_get_thread_data()->cpu_data;
}
static BOOL is_inside_syscall( ucontext_t *sigcontext )
{
return ((char *)SP_sig(sigcontext) >= (char *)ntdll_get_thread_data()->kernel_stack &&
(char *)SP_sig(sigcontext) <= (char *)arm_thread_data()->syscall_frame);
}
/***********************************************************************
* unwind_builtin_dll
*/
NTSTATUS CDECL unwind_builtin_dll( ULONG type, struct _DISPATCHER_CONTEXT *dispatch, CONTEXT *context )
{
return STATUS_UNSUCCESSFUL;
}
/***********************************************************************
* get_trap_code
*
* Get the trap code for a signal.
*/
static inline enum arm_trap_code get_trap_code( int signal, const ucontext_t *sigcontext )
{
#ifdef TRAP_sig
enum arm_trap_code trap = TRAP_sig(sigcontext);
if (trap)
return trap;
#endif
switch (signal)
{
case SIGILL:
return TRAP_ARM_PRIVINFLT;
case SIGSEGV:
return TRAP_ARM_PAGEFLT;
case SIGBUS:
return TRAP_ARM_ALIGNFLT;
default:
return TRAP_ARM_UNKNOWN;
}
}
/***********************************************************************
* 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
}
/***********************************************************************
* 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 */
if (CPSR_sig(sigcontext) & 0x20) context->Pc |= 1; /* Thumb mode */
save_fpu( context, sigcontext );
}
/***********************************************************************
* 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 */
if (PC_sig(sigcontext) & 1) CPSR_sig(sigcontext) |= 0x20;
else CPSR_sig(sigcontext) &= ~0x20;
restore_fpu( context, sigcontext );
}
/***********************************************************************
* signal_set_full_context
*/
NTSTATUS signal_set_full_context( CONTEXT *context )
{
NTSTATUS status = NtSetContextThread( GetCurrentThread(), context );
if (!status && (context->ContextFlags & CONTEXT_INTEGER) == CONTEXT_INTEGER)
arm_thread_data()->syscall_frame->restore_flags |= CONTEXT_INTEGER;
return status;
}
/***********************************************************************
* get_native_context
*/
void *get_native_context( CONTEXT *context )
{
return context;
}
/***********************************************************************
* get_wow_context
*/
void *get_wow_context( CONTEXT *context )
{
return NULL;
}
/***********************************************************************
* NtSetContextThread (NTDLL.@)
* ZwSetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
{
NTSTATUS ret;
struct syscall_frame *frame = arm_thread_data()->syscall_frame;
DWORD flags = context->ContextFlags & ~CONTEXT_ARM;
BOOL self = (handle == GetCurrentThread());
if (!self)
{
ret = set_thread_context( handle, context, &self, IMAGE_FILE_MACHINE_ARMNT );
if (ret || !self) return ret;
}
if (flags & CONTEXT_INTEGER)
{
frame->r0 = context->R0;
frame->r1 = context->R1;
frame->r2 = context->R2;
frame->r3 = context->R3;
frame->r4 = context->R4;
frame->r5 = context->R5;
frame->r6 = context->R6;
frame->r7 = context->R7;
frame->r8 = context->R8;
frame->r9 = context->R9;
frame->r10 = context->R10;
frame->r11 = context->R11;
frame->r12 = context->R12;
}
if (flags & CONTEXT_CONTROL)
{
frame->sp = context->Sp;
frame->lr = context->Lr;
frame->pc = context->Pc & ~1;
frame->cpsr = context->Cpsr;
if (context->Cpsr & 0x20) frame->pc |= 1; /* thumb */
}
if (flags & CONTEXT_FLOATING_POINT)
{
frame->fpscr = context->Fpscr;
memcpy( frame->d, context->u.D, sizeof(context->u.D) );
}
frame->restore_flags |= flags & ~CONTEXT_INTEGER;
return STATUS_SUCCESS;
}
/***********************************************************************
* NtGetContextThread (NTDLL.@)
* ZwGetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
{
struct syscall_frame *frame = arm_thread_data()->syscall_frame;
DWORD needed_flags = context->ContextFlags & ~CONTEXT_ARM;
BOOL self = (handle == GetCurrentThread());
if (!self)
{
NTSTATUS ret = get_thread_context( handle, &context, &self, IMAGE_FILE_MACHINE_ARMNT );
if (ret || !self) return ret;
}
if (needed_flags & CONTEXT_INTEGER)
{
context->R0 = frame->r0;
context->R1 = frame->r1;
context->R2 = frame->r2;
context->R3 = frame->r3;
context->R4 = frame->r4;
context->R5 = frame->r5;
context->R6 = frame->r6;
context->R7 = frame->r7;
context->R8 = frame->r8;
context->R9 = frame->r9;
context->R10 = frame->r10;
context->R11 = frame->r11;
context->R12 = frame->r12;
context->ContextFlags |= CONTEXT_INTEGER;
}
if (needed_flags & CONTEXT_CONTROL)
{
context->Sp = frame->sp;
context->Lr = frame->lr;
context->Pc = frame->pc;
context->Cpsr = frame->cpsr;
context->ContextFlags |= CONTEXT_CONTROL;
}
if (needed_flags & CONTEXT_FLOATING_POINT)
{
context->Fpscr = frame->fpscr;
memcpy( context->u.D, frame->d, sizeof(frame->d) );
context->ContextFlags |= CONTEXT_FLOATING_POINT;
}
return STATUS_SUCCESS;
}
/***********************************************************************
* set_thread_wow64_context
*/
NTSTATUS set_thread_wow64_context( HANDLE handle, const void *ctx, ULONG size )
{
return STATUS_INVALID_INFO_CLASS;
}
/***********************************************************************
* get_thread_wow64_context
*/
NTSTATUS get_thread_wow64_context( HANDLE handle, void *ctx, ULONG size )
{
return STATUS_INVALID_INFO_CLASS;
}
/***********************************************************************
* setup_exception
*
* Modify the signal context to call the exception raise function.
*/
static void setup_exception( ucontext_t *sigcontext, EXCEPTION_RECORD *rec )
{
struct
{
CONTEXT context;
EXCEPTION_RECORD rec;
} *stack;
void *stack_ptr = (void *)(SP_sig(sigcontext) & ~3);
CONTEXT context;
NTSTATUS status;
rec->ExceptionAddress = (void *)PC_sig(sigcontext);
save_context( &context, sigcontext );
status = send_debug_event( rec, &context, TRUE );
if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
{
restore_context( &context, sigcontext );
return;
}
stack = virtual_setup_exception( stack_ptr, sizeof(*stack), rec );
stack->rec = *rec;
stack->context = context;
/* now modify the sigcontext to return to the raise function */
SP_sig(sigcontext) = (DWORD)stack;
PC_sig(sigcontext) = (DWORD)pKiUserExceptionDispatcher;
if (PC_sig(sigcontext) & 1) CPSR_sig(sigcontext) |= 0x20;
else CPSR_sig(sigcontext) &= ~0x20;
REGn_sig(0, sigcontext) = (DWORD)&stack->rec; /* first arg for KiUserExceptionDispatcher */
REGn_sig(1, sigcontext) = (DWORD)&stack->context; /* second arg for KiUserExceptionDispatcher */
}
/***********************************************************************
* call_user_apc_dispatcher
*/
NTSTATUS call_user_apc_dispatcher( CONTEXT *context, ULONG_PTR arg1, ULONG_PTR arg2, ULONG_PTR arg3,
PNTAPCFUNC func, NTSTATUS status )
{
struct syscall_frame *frame = arm_thread_data()->syscall_frame;
ULONG sp = context ? context->Sp : frame->sp;
struct apc_stack_layout
{
void *func;
void *align;
CONTEXT context;
} *stack;
sp &= ~15;
stack = (struct apc_stack_layout *)sp - 1;
if (context)
{
memmove( &stack->context, context, sizeof(stack->context) );
NtSetContextThread( GetCurrentThread(), &stack->context );
}
else
{
stack->context.ContextFlags = CONTEXT_FULL;
NtGetContextThread( GetCurrentThread(), &stack->context );
stack->context.R0 = status;
}
frame->sp = (DWORD)stack;
frame->pc = (DWORD)pKiUserApcDispatcher;
frame->r0 = (DWORD)&stack->context;
frame->r1 = arg1;
frame->r2 = arg2;
frame->r3 = arg3;
stack->func = func;
frame->restore_flags |= CONTEXT_CONTROL | CONTEXT_INTEGER;
return status;
}
/***********************************************************************
* call_raise_user_exception_dispatcher
*/
void call_raise_user_exception_dispatcher(void)
{
arm_thread_data()->syscall_frame->pc = (DWORD)pKiRaiseUserExceptionDispatcher;
}
/***********************************************************************
* call_user_exception_dispatcher
*/
NTSTATUS call_user_exception_dispatcher( EXCEPTION_RECORD *rec, CONTEXT *context )
{
struct syscall_frame *frame = arm_thread_data()->syscall_frame;
NTSTATUS status = NtSetContextThread( GetCurrentThread(), context );
if (status) return status;
frame->r0 = (DWORD)rec;
frame->r1 = (DWORD)context;
frame->pc = (DWORD)pKiUserExceptionDispatcher;
frame->restore_flags |= CONTEXT_INTEGER | CONTEXT_CONTROL;
return status;
}
struct user_callback_frame
{
struct syscall_frame frame;
void **ret_ptr;
ULONG *ret_len;
__wine_jmp_buf jmpbuf;
NTSTATUS status;
};
/***********************************************************************
* KeUserModeCallback
*/
NTSTATUS WINAPI KeUserModeCallback( ULONG id, const void *args, ULONG len, void **ret_ptr, ULONG *ret_len )
{
struct user_callback_frame callback_frame = { { 0 }, ret_ptr, ret_len };
if ((char *)ntdll_get_thread_data()->kernel_stack + min_kernel_stack > (char *)&callback_frame)
return STATUS_STACK_OVERFLOW;
if (!__wine_setjmpex( &callback_frame.jmpbuf, NULL ))
{
struct syscall_frame *frame = arm_thread_data()->syscall_frame;
void *args_data = (void *)((frame->sp - len) & ~15);
memcpy( args_data, args, len );
callback_frame.frame.r0 = id;
callback_frame.frame.r1 = (ULONG_PTR)args;
callback_frame.frame.r2 = len;
callback_frame.frame.sp = (ULONG_PTR)args_data;
callback_frame.frame.pc = (ULONG_PTR)pKiUserCallbackDispatcher;
callback_frame.frame.restore_flags = CONTEXT_INTEGER;
callback_frame.frame.syscall_table = frame->syscall_table;
callback_frame.frame.prev_frame = frame;
arm_thread_data()->syscall_frame = &callback_frame.frame;
__wine_syscall_dispatcher_return( &callback_frame.frame, 0 );
}
return callback_frame.status;
}
/***********************************************************************
* NtCallbackReturn (NTDLL.@)
*/
NTSTATUS WINAPI NtCallbackReturn( void *ret_ptr, ULONG ret_len, NTSTATUS status )
{
struct user_callback_frame *frame = (struct user_callback_frame *)arm_thread_data()->syscall_frame;
if (!frame->frame.prev_frame) return STATUS_NO_CALLBACK_ACTIVE;
*frame->ret_ptr = ret_ptr;
*frame->ret_len = ret_len;
frame->status = status;
arm_thread_data()->syscall_frame = frame->frame.prev_frame;
__wine_longjmp( &frame->jmpbuf, 1 );
}
/***********************************************************************
* handle_syscall_fault
*
* Handle a page fault happening during a system call.
*/
static BOOL handle_syscall_fault( ucontext_t *context, EXCEPTION_RECORD *rec )
{
struct syscall_frame *frame = arm_thread_data()->syscall_frame;
DWORD i;
if (!is_inside_syscall( context ) && !ntdll_get_thread_data()->jmp_buf) return FALSE;
TRACE( "code=%x flags=%x addr=%p pc=%08x tid=%04x\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
(DWORD)PC_sig(context), GetCurrentThreadId() );
for (i = 0; i < rec->NumberParameters; i++)
TRACE( " info[%d]=%08lx\n", i, rec->ExceptionInformation[i] );
TRACE( " r0=%08x r1=%08x r2=%08x r3=%08x r4=%08x r5=%08x\n",
(DWORD)REGn_sig(0, context), (DWORD)REGn_sig(1, context), (DWORD)REGn_sig(2, context),
(DWORD)REGn_sig(3, context), (DWORD)REGn_sig(4, context), (DWORD)REGn_sig(5, context) );
TRACE( " r6=%08x r7=%08x r8=%08x r9=%08x r10=%08x r11=%08x\n",
(DWORD)REGn_sig(6, context), (DWORD)REGn_sig(7, context), (DWORD)REGn_sig(8, context),
(DWORD)REGn_sig(9, context), (DWORD)REGn_sig(10, context), (DWORD)FP_sig(context) );
TRACE( " r12=%08x sp=%08x lr=%08x pc=%08x cpsr=%08x\n",
(DWORD)IP_sig(context), (DWORD)SP_sig(context), (DWORD)LR_sig(context),
(DWORD)PC_sig(context), (DWORD)CPSR_sig(context) );
if (ntdll_get_thread_data()->jmp_buf)
{
TRACE( "returning to handler\n" );
REGn_sig(0, context) = (DWORD)ntdll_get_thread_data()->jmp_buf;
REGn_sig(1, context) = 1;
PC_sig(context) = (DWORD)__wine_longjmp;
ntdll_get_thread_data()->jmp_buf = NULL;
}
else
{
TRACE( "returning to user mode ip=%08x ret=%08x\n", frame->pc, rec->ExceptionCode );
REGn_sig(0, context) = (DWORD)frame;
REGn_sig(1, context) = rec->ExceptionCode;
PC_sig(context) = (DWORD)__wine_syscall_dispatcher_return;
}
return TRUE;
}
/**********************************************************************
* segv_handler
*
* Handler for SIGSEGV and related errors.
*/
static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { 0 };
ucontext_t *context = sigcontext;
switch (get_trap_code(signal, context))
{
case TRAP_ARM_PRIVINFLT: /* Invalid opcode exception */
if (*(WORD *)PC_sig(context) == 0xdefe) /* breakpoint */
{
rec.ExceptionCode = EXCEPTION_BREAKPOINT;
rec.NumberParameters = 1;
break;
}
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
case TRAP_ARM_PAGEFLT: /* Page fault */
rec.NumberParameters = 2;
rec.ExceptionInformation[0] = (get_error_code(context) & 0x800) != 0;
rec.ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
rec.ExceptionCode = virtual_handle_fault( siginfo->si_addr, rec.ExceptionInformation[0],
(void *)SP_sig(context) );
if (!rec.ExceptionCode) return;
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(signal, context));
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
}
if (handle_syscall_fault( context, &rec )) return;
setup_exception( context, &rec );
}
/**********************************************************************
* trap_handler
*
* Handler for SIGTRAP.
*/
static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { 0 };
switch (siginfo->si_code)
{
case TRAP_TRACE:
rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
break;
case TRAP_BRKPT:
default:
rec.ExceptionCode = EXCEPTION_BREAKPOINT;
rec.NumberParameters = 1;
break;
}
setup_exception( sigcontext, &rec );
}
/**********************************************************************
* fpe_handler
*
* Handler for SIGFPE.
*/
static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { 0 };
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;
}
setup_exception( sigcontext, &rec );
}
/**********************************************************************
* int_handler
*
* Handler for SIGINT.
*/
static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
HANDLE handle;
if (!p__wine_ctrl_routine) return;
if (!NtCreateThreadEx( &handle, THREAD_ALL_ACCESS, NULL, NtCurrentProcess(),
p__wine_ctrl_routine, 0 /* CTRL_C_EVENT */, 0, 0, 0, 0, NULL ))
NtClose( handle );
}
/**********************************************************************
* abrt_handler
*
* Handler for SIGABRT.
*/
static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { EXCEPTION_WINE_ASSERTION, EH_NONCONTINUABLE };
setup_exception( sigcontext, &rec );
}
/**********************************************************************
* quit_handler
*
* Handler for SIGQUIT.
*/
static void quit_handler( int signal, siginfo_t *siginfo, void *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;
if (is_inside_syscall( sigcontext ))
{
context.ContextFlags = CONTEXT_FULL;
NtGetContextThread( GetCurrentThread(), &context );
wait_suspend( &context );
NtSetContextThread( GetCurrentThread(), &context );
}
else
{
save_context( &context, sigcontext );
wait_suspend( &context );
restore_context( &context, sigcontext );
}
}
/**********************************************************************
* get_thread_ldt_entry
*/
NTSTATUS get_thread_ldt_entry( HANDLE handle, void *data, ULONG len, ULONG *ret_len )
{
return STATUS_NOT_IMPLEMENTED;
}
/******************************************************************************
* NtSetLdtEntries (NTDLL.@)
* ZwSetLdtEntries (NTDLL.@)
*/
NTSTATUS WINAPI NtSetLdtEntries( ULONG sel1, LDT_ENTRY entry1, ULONG sel2, LDT_ENTRY entry2 )
{
return STATUS_NOT_IMPLEMENTED;
}
/**********************************************************************
* signal_init_threading
*/
void signal_init_threading(void)
{
}
/**********************************************************************
* signal_alloc_thread
*/
NTSTATUS signal_alloc_thread( TEB *teb )
{
teb->WOW32Reserved = __wine_syscall_dispatcher;
return STATUS_SUCCESS;
}
/**********************************************************************
* signal_free_thread
*/
void signal_free_thread( TEB *teb )
{
}
/**********************************************************************
* signal_init_thread
*/
void signal_init_thread( TEB *teb )
{
__asm__ __volatile__( "mcr p15, 0, %0, c13, c0, 2" : : "r" (teb) );
}
/**********************************************************************
* signal_init_process
*/
void signal_init_process(void)
{
struct sigaction sig_act;
void *kernel_stack = (char *)ntdll_get_thread_data()->kernel_stack + kernel_stack_size;
arm_thread_data()->syscall_frame = (struct syscall_frame *)kernel_stack - 1;
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 = trap_handler;
if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = segv_handler;
if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
return;
error:
perror("sigaction");
exit(1);
}
/***********************************************************************
* call_init_thunk
*/
void DECLSPEC_HIDDEN call_init_thunk( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend, TEB *teb )
{
struct arm_thread_data *thread_data = (struct arm_thread_data *)&teb->GdiTebBatch;
struct syscall_frame *frame = thread_data->syscall_frame;
CONTEXT *ctx, context = { CONTEXT_ALL };
context.R0 = (DWORD)entry;
context.R1 = (DWORD)arg;
context.Sp = (DWORD)teb->Tib.StackBase;
context.Pc = (DWORD)pRtlUserThreadStart;
if (context.Pc & 1) context.Cpsr |= 0x20; /* thumb mode */
if ((ctx = get_cpu_area( IMAGE_FILE_MACHINE_ARMNT ))) *ctx = context;
if (suspend) wait_suspend( &context );
ctx = (CONTEXT *)((ULONG_PTR)context.Sp & ~15) - 1;
*ctx = context;
ctx->ContextFlags = CONTEXT_FULL;
NtSetContextThread( GetCurrentThread(), ctx );
frame->sp = (DWORD)ctx;
frame->pc = (DWORD)pLdrInitializeThunk;
frame->r0 = (DWORD)ctx;
frame->prev_frame = NULL;
frame->restore_flags |= CONTEXT_INTEGER;
frame->syscall_table = KeServiceDescriptorTable;
pthread_sigmask( SIG_UNBLOCK, &server_block_set, NULL );
__wine_syscall_dispatcher_return( frame, 0 );
}
/***********************************************************************
* signal_start_thread
*/
__ASM_GLOBAL_FUNC( signal_start_thread,
"push {r4-r12,lr}\n\t"
/* store exit frame */
"str sp, [r3, #0x1d4]\n\t" /* arm_thread_data()->exit_frame */
/* set syscall frame */
"ldr r6, [r3, #0x1d8]\n\t" /* arm_thread_data()->syscall_frame */
"cbnz r6, 1f\n\t"
"sub r6, sp, #0x160\n\t" /* sizeof(struct syscall_frame) */
"str r6, [r3, #0x1d8]\n\t" /* arm_thread_data()->syscall_frame */
"1:\tmov sp, r6\n\t"
"bl " __ASM_NAME("call_init_thunk") )
/***********************************************************************
* signal_exit_thread
*/
__ASM_GLOBAL_FUNC( signal_exit_thread,
"ldr r3, [r2, #0x1d4]\n\t" /* arm_thread_data()->exit_frame */
"mov ip, #0\n\t"
"str ip, [r2, #0x1d4]\n\t"
"cmp r3, ip\n\t"
"it ne\n\t"
"movne sp, r3\n\t"
"blx r1" )
/***********************************************************************
* __wine_syscall_dispatcher
*/
__ASM_GLOBAL_FUNC( __wine_syscall_dispatcher,
"mrc p15, 0, r1, c13, c0, 2\n\t" /* NtCurrentTeb() */
"ldr r1, [r1, #0x1d8]\n\t" /* arm_thread_data()->syscall_frame */
"add r0, r1, #0x10\n\t"
"stm r0, {r4-r12,lr}\n\t"
"str sp, [r1, #0x38]\n\t"
"str r3, [r1, #0x3c]\n\t"
"mrs r0, CPSR\n\t"
"bfi r0, lr, #5, #1\n\t" /* set thumb bit */
"str r0, [r1, #0x40]\n\t"
"mov r0, #0\n\t"
"str r0, [r1, #0x44]\n\t" /* frame->restore_flags */
#ifndef __SOFTFP__
"vmrs r0, fpscr\n\t"
"str r0, [r1, #0x48]\n\t"
"add r0, r1, #0x60\n\t"
"vstm r0, {d0-d15}\n\t"
#endif
"mov r6, sp\n\t"
"mov sp, r1\n\t"
"mov r8, r1\n\t"
"ldr r5, [r1, #0x50]\n\t" /* frame->syscall_table */
"ubfx r4, ip, #12, #2\n\t" /* syscall table number */
"bfc ip, #12, #20\n\t" /* syscall number */
"add r4, r5, r4, lsl #4\n\t"
"ldr r5, [r4, #8]\n\t" /* table->ServiceLimit */
"cmp ip, r5\n\t"
"bcs 5f\n\t"
"ldr r5, [r4, #12]\n\t" /* table->ArgumentTable */
"ldrb r5, [r5, ip]\n\t"
"cmp r5, #16\n\t"
"it le\n\t"
"movle r5, #16\n\t"
"sub r0, sp, r5\n\t"
"and r0, #~7\n\t"
"mov sp, r0\n"
"2:\tsubs r5, r5, #4\n\t"
"ldr r0, [r6, r5]\n\t"
"str r0, [sp, r5]\n\t"
"bgt 2b\n\t"
"pop {r0-r3}\n\t" /* first 4 args are in registers */
"ldr r5, [r4]\n\t" /* table->ServiceTable */
"ldr ip, [r5, ip, lsl #2]\n\t"
"blx ip\n"
"4:\tldr ip, [r8, #0x44]\n\t" /* frame->restore_flags */
#ifndef __SOFTFP__
"tst ip, #4\n\t" /* CONTEXT_FLOATING_POINT */
"beq 3f\n\t"
"ldr r4, [r8, #0x48]\n\t"
"vmsr fpscr, r4\n\t"
"add r4, r8, #0x60\n\t"
"vldm r4, {d0-d15}\n"
"3:\n\t"
#endif
"tst ip, #2\n\t" /* CONTEXT_INTEGER */
"it ne\n\t"
"ldmne r8, {r0-r3}\n\t"
"ldr lr, [r8, #0x3c]\n\t"
"ldr sp, [r8, #0x38]\n\t"
"add r8, r8, #0x10\n\t"
"ldm r8, {r4-r12,pc}\n"
"5:\tmovw r0, #0x000d\n\t" /* STATUS_INVALID_PARAMETER */
"movt r0, #0xc000\n\t"
"b 4b\n"
__ASM_NAME("__wine_syscall_dispatcher_return") ":\n\t"
"mov r8, r0\n\t"
"mov r0, r1\n\t"
"b 4b" )
/***********************************************************************
* __wine_setjmpex
*/
__ASM_GLOBAL_FUNC( __wine_setjmpex,
"stm r0, {r1,r4-r11}\n" /* jmp_buf->Frame,R4..R11 */
"str sp, [r0, #0x24]\n\t" /* jmp_buf->Sp */
"str lr, [r0, #0x28]\n\t" /* jmp_buf->Pc */
#ifndef __SOFTFP__
"vmrs r2, fpscr\n\t"
"str r2, [r0, #0x2c]\n\t" /* jmp_buf->Fpscr */
"add r0, r0, #0x30\n\t"
"vstm r0, {d8-d15}\n\t" /* jmp_buf->D[0..7] */
#endif
"mov r0, #0\n\t"
"bx lr" )
/***********************************************************************
* __wine_longjmp
*/
__ASM_GLOBAL_FUNC( __wine_longjmp,
"ldm r0, {r3-r11}\n\t" /* jmp_buf->Frame,R4..R11 */
"ldr sp, [r0, #0x24]\n\t" /* jmp_buf->Sp */
"ldr r2, [r0, #0x28]\n\t" /* jmp_buf->Pc */
#ifndef __SOFTFP__
"ldr r3, [r0, #0x2c]\n\t" /* jmp_buf->Fpscr */
"vmsr fpscr, r3\n\t"
"add r0, r0, #0x30\n\t"
"vldm r0, {d8-d15}\n\t" /* jmp_buf->D[0..7] */
#endif
"mov r0, r1\n\t" /* retval */
"bx r2" )
#endif /* __arm__ */