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

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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
*/
#if 0
#pragma makedep unix
#endif
#ifdef __arm__
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <pthread.h>
#include <signal.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#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 "winnt.h"
#include "winternl.h"
#include "wine/exception.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 pad;
DWORD cpsr;
DWORD r5;
DWORD r6;
DWORD r7;
DWORD r8;
DWORD r9;
DWORD r10;
DWORD r11;
DWORD thunk_addr;
DWORD r4;
DWORD ret_addr;
};
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;
}
void *get_syscall_frame(void)
{
return arm_thread_data()->syscall_frame;
}
void set_syscall_frame(void *frame)
{
arm_thread_data()->syscall_frame = 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 );
}
/***********************************************************************
* set_cpu_context
*
* Set the new CPU context.
*/
void DECLSPEC_HIDDEN set_cpu_context( const CONTEXT *context );
__ASM_GLOBAL_FUNC( set_cpu_context,
"ldr r2, [r0, #0x44]\n\t" /* context->Cpsr */
"tst r2, #0x20\n\t" /* thumb? */
"ldr r1, [r0, #0x40]\n\t" /* context->Pc */
"ite ne\n\t"
"orrne r1, r1, #1\n\t" /* Adjust PC according to thumb */
"biceq r1, r1, #1\n\t" /* Adjust PC according to arm */
"msr CPSR_f, r2\n\t"
"ldr lr, [r0, #0x3c]\n\t" /* context->Lr */
"ldr sp, [r0, #0x38]\n\t" /* context->Sp */
"push {r1}\n\t"
"add r0, #0x4\n\t"
"ldm 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;
}
/***********************************************************************
* 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)
{
arm_thread_data()->syscall_frame = NULL;
set_cpu_context( context );
}
return ret;
}
/***********************************************************************
* NtGetContextThread (NTDLL.@)
* ZwGetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
{
NTSTATUS ret;
struct syscall_frame *frame = arm_thread_data()->syscall_frame;
DWORD needed_flags = context->ContextFlags & ~CONTEXT_ARM;
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)
{
if (needed_flags & CONTEXT_INTEGER)
{
context->R0 = 0;
context->R1 = 0;
context->R2 = 0;
context->R3 = 0;
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 = 0;
context->ContextFlags |= CONTEXT_INTEGER;
}
if (needed_flags & CONTEXT_CONTROL)
{
context->Sp = (DWORD)&frame->r4;
context->Lr = frame->thunk_addr;
context->Pc = frame->thunk_addr;
context->Cpsr = frame->cpsr;
context->ContextFlags |= CONTEXT_CONTROL;
}
if (needed_flags & CONTEXT_FLOATING_POINT) FIXME( "floating point not implemented\n" );
}
return STATUS_SUCCESS;
}
/***********************************************************************
* 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 );
if (rec->ExceptionCode == EXCEPTION_BREAKPOINT)
context.Pc += CPSR_sig(sigcontext) & 0x20 ? 2 : 4;
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
*/
__ASM_GLOBAL_FUNC( call_user_apc_dispatcher,
"mov r5, r1\n\t" /* ctx */
"mov r6, r2\n\t" /* arg1 */
"mov r7, r3\n\t" /* arg2 */
"ldr r8, [sp]\n\t" /* func */
"ldr r9, [sp, #4]\n\t" /* dispatcher */
"mrc p15, 0, r10, c13, c0, 2\n\t" /* NtCurrentTeb() */
"cmp r0, #0\n\t" /* context_ptr */
"beq 1f\n\t"
"ldr r0, [r0, #0x38]\n\t" /* context_ptr->Sp */
"sub r0, r0, #0x1c8\n\t" /* sizeof(CONTEXT) + offsetof(frame,r4) */
"mov ip, #0\n\t"
"str ip, [r10, #0x1d8]\n\t" /* arm_thread_data()->syscall_frame */
"mov sp, r0\n\t"
"b 2f\n"
"1:\tldr r0, [r10, #0x1d8]\n\t"
"sub r0, #0x1a0\n\t"
"mov sp, r0\n\t"
"mov r0, #3\n\t"
"movt r0, #32\n\t"
"str r0, [sp]\n\t" /* context.ContextFlags = CONTEXT_FULL */
"mov r1, sp\n\t"
"mov r0, #~1\n\t"
"bl " __ASM_NAME("NtGetContextThread") "\n\t"
"mov r0, #0xc0\n\t"
"str r0, [sp, #4]\n\t" /* context.R0 = STATUS_USER_APC */
"mov r0, sp\n\t"
"mov ip, #0\n\t"
"str ip, [r10, #0x1d8]\n\t"
"2:\tmov r1, r5\n\t" /* ctx */
"mov r2, r6\n\t" /* arg1 */
"mov r3, r7\n\t" /* arg2 */
"push {r8, r9}\n\t" /* func */
"ldr lr, [r0, #0x3c]\n\t" /* context.Lr */
"bx r9" )
/***********************************************************************
* call_raise_user_exception_dispatcher
*/
__ASM_GLOBAL_FUNC( call_raise_user_exception_dispatcher,
"mov r2, r0\n\t" /* dispatcher */
"b " __ASM_NAME("call_user_exception_dispatcher") )
/***********************************************************************
* call_user_exception_dispatcher
*/
__ASM_GLOBAL_FUNC( call_user_exception_dispatcher,
"mrc p15, 0, r7, c13, c0, 2\n\t" /* NtCurrentTeb() */
"ldr r3, [r7, #0x1d8]\n\t" /* arm_thread_data()->syscall_frame */
"mov ip, #0\n\t"
"str ip, [r7, #0x1d8]\n\t"
"add r3, r3, #8\n\t"
"ldm r3, {r5-r11}\n\t"
"ldr r4, [r3, #32]\n\t"
"ldr lr, [r3, #36]\n\t"
"add r3, #40\n\t"
"mov sp, r3\n\t"
"bx r2" )
/***********************************************************************
* 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;
__WINE_FRAME *wine_frame = (__WINE_FRAME *)NtCurrentTeb()->Tib.ExceptionList;
DWORD i;
if (!frame) 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 ((char *)wine_frame < (char *)frame)
{
TRACE( "returning to handler\n" );
REGn_sig(0, context) = (DWORD)&wine_frame->jmp;
REGn_sig(1, context) = 1;
PC_sig(context) = (DWORD)__wine_longjmp;
}
else
{
TRACE( "returning to user mode ip=%08x ret=%08x\n", frame->ret_addr, rec->ExceptionCode );
REGn_sig(0, context) = rec->ExceptionCode;
REGn_sig(4, context) = frame->r4;
REGn_sig(5, context) = frame->r5;
REGn_sig(6, context) = frame->r6;
REGn_sig(7, context) = frame->r7;
REGn_sig(8, context) = frame->r8;
REGn_sig(9, context) = frame->r9;
REGn_sig(10, context) = frame->r10;
FP_sig(context) = frame->r11;
LR_sig(context) = frame->thunk_addr;
SP_sig(context) = (DWORD)&frame->r4;
PC_sig(context) = frame->thunk_addr;
CPSR_sig(context) = frame->cpsr;
arm_thread_data()->syscall_frame = NULL;
}
return TRUE;
}
/**********************************************************************
* segv_handler
*
* Handler for SIGSEGV and related errors.
*/
static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { 0 };
ucontext_t *context = sigcontext;
switch (get_trap_code(signal, context))
{
case TRAP_ARM_PRIVINFLT: /* Invalid opcode exception */
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 )
{
EXCEPTION_RECORD rec = { CONTROL_C_EXIT };
setup_exception( sigcontext, &rec );
}
/**********************************************************************
* abrt_handler
*
* Handler for SIGABRT.
*/
static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { EXCEPTION_WINE_ASSERTION, EH_NONCONTINUABLE };
setup_exception( sigcontext, &rec );
}
/**********************************************************************
* quit_handler
*
* Handler for SIGQUIT.
*/
static void quit_handler( int signal, siginfo_t *siginfo, void *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 );
}
/**********************************************************************
* get_thread_ldt_entry
*/
NTSTATUS get_thread_ldt_entry( HANDLE handle, void *data, ULONG len, ULONG *ret_len )
{
return STATUS_NOT_IMPLEMENTED;
}
/******************************************************************************
* NtSetLdtEntries (NTDLL.@)
* ZwSetLdtEntries (NTDLL.@)
*/
NTSTATUS WINAPI NtSetLdtEntries( ULONG sel1, LDT_ENTRY entry1, ULONG sel2, LDT_ENTRY entry2 )
{
return STATUS_NOT_IMPLEMENTED;
}
/**********************************************************************
* signal_init_threading
*/
void signal_init_threading(void)
{
}
/**********************************************************************
* signal_alloc_thread
*/
NTSTATUS signal_alloc_thread( TEB *teb )
{
return STATUS_SUCCESS;
}
/**********************************************************************
* signal_free_thread
*/
void signal_free_thread( TEB *teb )
{
}
/**********************************************************************
* 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;
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);
}
/***********************************************************************
* init_thread_context
*/
static void init_thread_context( CONTEXT *context, LPTHREAD_START_ROUTINE entry, void *arg, TEB *teb )
{
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 */
}
/***********************************************************************
* get_initial_context
*/
PCONTEXT DECLSPEC_HIDDEN get_initial_context( LPTHREAD_START_ROUTINE entry, void *arg,
BOOL suspend, TEB *teb )
{
CONTEXT *ctx;
if (suspend)
{
CONTEXT context = { CONTEXT_ALL };
init_thread_context( &context, entry, arg, teb );
wait_suspend( &context );
ctx = (CONTEXT *)((ULONG_PTR)context.Sp & ~15) - 1;
*ctx = context;
}
else
{
ctx = (CONTEXT *)teb->Tib.StackBase - 1;
init_thread_context( ctx, entry, arg, teb );
}
pthread_sigmask( SIG_UNBLOCK, &server_block_set, NULL );
ctx->ContextFlags = CONTEXT_FULL;
return ctx;
}
/***********************************************************************
* signal_start_thread
*/
__ASM_GLOBAL_FUNC( signal_start_thread,
"push {r4-r12,lr}\n\t"
"mov r5, r3\n\t" /* thunk */
/* store exit frame */
"ldr r3, [sp, #40]\n\t" /* teb */
"str sp, [r3, #0x1d4]\n\t" /* arm_thread_data()->exit_frame */
/* switch to thread stack */
"ldr r4, [r3, #4]\n\t" /* teb->Tib.StackBase */
"sub r4, #0x1000\n\t"
"mov sp, r4\n\t"
/* attach dlls */
"bl " __ASM_NAME("get_initial_context") "\n\t"
"mov lr, #0\n\t"
"bx r5" )
extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), TEB *teb );
__ASM_GLOBAL_FUNC( call_thread_exit_func,
"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" )
/***********************************************************************
* signal_exit_thread
*/
void signal_exit_thread( int status, void (*func)(int) )
{
call_thread_exit_func( status, func, NtCurrentTeb() );
}
#endif /* __arm__ */
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