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wine/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 <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
#ifdef HAVE_LINK_H
# include <link.h>
#endif
#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);
#define NTDLL_DWARF_H_NO_UNWINDER
#include "dwarf.h"
/***********************************************************************
* 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->D, frame->fpregs, sizeof(context->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->D, sizeof(context->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 */
};
/* stack layout when calling KiUserExceptionDispatcher */
struct exc_stack_layout
{
CONTEXT context; /* 000 */
EXCEPTION_RECORD rec; /* 1a0 */
ULONG redzone[2]; /* 1f0 */
};
C_ASSERT( offsetof(struct exc_stack_layout, rec) == 0x1a0 );
C_ASSERT( sizeof(struct exc_stack_layout) == 0x1f8 );
/* stack layout when calling KiUserApcDispatcher */
struct apc_stack_layout
{
void *func; /* 000 APC to call*/
ULONG args[3]; /* 004 function arguments */
ULONG alertable; /* 010 */
ULONG align; /* 014 */
CONTEXT context; /* 018 */
ULONG redzone[2]; /* 1b8 */
};
C_ASSERT( offsetof(struct apc_stack_layout, context) == 0x18 );
C_ASSERT( sizeof(struct apc_stack_layout) == 0x1c0 );
/* stack layout when calling KiUserCallbackDispatcher */
struct callback_stack_layout
{
void *args; /* 000 arguments */
ULONG len; /* 004 arguments len */
ULONG id; /* 008 function id */
ULONG lr; /* 00c */
ULONG sp; /* 010 */
ULONG pc; /* 014 */
BYTE args_data[0]; /* 018 copied argument data*/
};
C_ASSERT( sizeof(struct callback_stack_layout) == 0x18 );
struct syscall_frame
{
UINT r0; /* 000 */
UINT r1; /* 004 */
UINT r2; /* 008 */
UINT r3; /* 00c */
UINT r4; /* 010 */
UINT r5; /* 014 */
UINT r6; /* 018 */
UINT r7; /* 01c */
UINT r8; /* 020 */
UINT r9; /* 024 */
UINT r10; /* 028 */
UINT r11; /* 02c */
UINT r12; /* 030 */
UINT pc; /* 034 */
UINT sp; /* 038 */
UINT lr; /* 03c */
UINT cpsr; /* 040 */
UINT restore_flags; /* 044 */
UINT fpscr; /* 048 */
struct syscall_frame *prev_frame; /* 04c */
void *syscall_cfa; /* 050 */
UINT syscall_id; /* 054 */
UINT align[2]; /* 058 */
ULONGLONG d[32]; /* 060 */
};
C_ASSERT( sizeof( struct syscall_frame ) == 0x160);
void set_process_instrumentation_callback( void *callback )
{
if (callback) FIXME( "Not supported.\n" );
}
/***********************************************************************
* 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
}
/***********************************************************************
* get_udf_immediate
*
* Get the immediate operand if the PC is at a UDF instruction.
*/
static inline int get_udf_immediate( const ucontext_t *sigcontext )
{
if (CPSR_sig(sigcontext) & 0x20)
{
WORD thumb_insn = *(WORD *)PC_sig(sigcontext);
if ((thumb_insn >> 8) == 0xde) return thumb_insn & 0xff;
if ((thumb_insn & 0xfff0) == 0xf7f0) /* udf.w */
{
WORD ext = *(WORD *)(PC_sig(sigcontext) + 2);
if ((ext & 0xf000) == 0xa000) return ((thumb_insn & 0xf) << 12) | (ext & 0x0fff);
}
}
else
{
DWORD arm_insn = *(DWORD *)PC_sig(sigcontext);
if ((arm_insn & 0xfff000f0) == 0xe7f000f0)
{
return ((arm_insn >> 4) & 0xfff0) | (arm_insn & 0xf);
}
}
return -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 */
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)
get_syscall_frame()->restore_flags |= CONTEXT_INTEGER;
return status;
}
/***********************************************************************
* get_native_context
*/
void *get_native_context( CONTEXT *context )
{
return is_old_wow64() ? NULL : context;
}
/***********************************************************************
* get_wow_context
*/
void *get_wow_context( CONTEXT *context )
{
return is_old_wow64() ? context : NULL;
}
/***********************************************************************
* NtSetContextThread (NTDLL.@)
* ZwSetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
{
NTSTATUS ret;
struct syscall_frame *frame = get_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->D, sizeof(context->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 = get_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->D, frame->d, sizeof(frame->d) );
context->ContextFlags |= CONTEXT_FLOATING_POINT;
}
set_context_exception_reporting_flags( &context->ContextFlags, CONTEXT_SERVICE_ACTIVE );
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_raise_exception
*/
static void setup_raise_exception( ucontext_t *sigcontext, EXCEPTION_RECORD *rec, CONTEXT *context )
{
struct exc_stack_layout *stack;
void *stack_ptr = (void *)(SP_sig(sigcontext) & ~7);
NTSTATUS status;
status = send_debug_event( rec, context, TRUE, TRUE );
if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
{
restore_context( context, sigcontext );
return;
}
/* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context->Pc -= 2;
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;
}
/***********************************************************************
* setup_exception
*
* Modify the signal context to call the exception raise function.
*/
static void setup_exception( ucontext_t *sigcontext, EXCEPTION_RECORD *rec )
{
CONTEXT context;
rec->ExceptionAddress = (void *)PC_sig(sigcontext);
save_context( &context, sigcontext );
setup_raise_exception( sigcontext, rec, &context );
}
/***********************************************************************
* call_user_apc_dispatcher
*/
NTSTATUS call_user_apc_dispatcher( CONTEXT *context, unsigned int flags, ULONG_PTR arg1, ULONG_PTR arg2, ULONG_PTR arg3,
PNTAPCFUNC func, NTSTATUS status )
{
struct syscall_frame *frame = get_syscall_frame();
ULONG sp = context ? context->Sp : frame->sp;
struct apc_stack_layout *stack;
if (flags) FIXME( "flags %#x are not supported.\n", flags );
sp &= ~7;
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;
}
stack->func = func;
stack->args[0] = arg1;
stack->args[1] = arg2;
stack->args[2] = arg3;
stack->alertable = TRUE;
frame->sp = (DWORD)stack;
frame->pc = (DWORD)pKiUserApcDispatcher;
frame->restore_flags |= CONTEXT_CONTROL;
return status;
}
/***********************************************************************
* call_raise_user_exception_dispatcher
*/
void call_raise_user_exception_dispatcher(void)
{
struct syscall_frame *frame = get_syscall_frame();
frame->sp += 16;
frame->pc = (DWORD)pKiRaiseUserExceptionDispatcher;
}
/***********************************************************************
* call_user_exception_dispatcher
*/
NTSTATUS call_user_exception_dispatcher( EXCEPTION_RECORD *rec, CONTEXT *context )
{
struct exc_stack_layout *stack;
struct syscall_frame *frame = get_syscall_frame();
NTSTATUS status = NtSetContextThread( GetCurrentThread(), context );
if (status) return status;
stack = (struct exc_stack_layout *)(context->Sp & ~7) - 1;
memmove( &stack->context, context, sizeof(*context) );
memmove( &stack->rec, rec, sizeof(*rec) );
frame->pc = (DWORD)pKiUserExceptionDispatcher;
frame->sp = (DWORD)stack;
frame->restore_flags |= CONTEXT_CONTROL;
return status;
}
/***********************************************************************
* call_user_mode_callback
*/
extern NTSTATUS call_user_mode_callback( ULONG user_sp, void **ret_ptr, ULONG *ret_len,
void *func, TEB *teb );
__ASM_GLOBAL_FUNC( call_user_mode_callback,
"push {r4-r12,lr}\n\t"
"add r7, sp, #0x28\n\t" /* syscall_cfa */
__ASM_CFI(".cfi_def_cfa 7,0\n\t")
__ASM_CFI(".cfi_offset r4,-0x28\n\t")
__ASM_CFI(".cfi_offset r5,-0x24\n\t")
__ASM_CFI(".cfi_offset r6,-0x20\n\t")
__ASM_CFI(".cfi_offset r7,-0x1c\n\t")
__ASM_CFI(".cfi_offset r8,-0x18\n\t")
__ASM_CFI(".cfi_offset r9,-0x14\n\t")
__ASM_CFI(".cfi_offset r10,-0x10\n\t")
__ASM_CFI(".cfi_offset r11,-0x0c\n\t")
__ASM_CFI(".cfi_offset r12,-0x08\n\t")
__ASM_CFI(".cfi_offset lr,-0x04\n\t")
"ldr r4, [sp, #0x28]\n\t" /* teb */
"ldr r5, [r4]\n\t" /* teb->Tib.ExceptionList */
"push {r1,r2,r4,r5}\n\t" /* ret_ptr, ret_len, teb, exception_list */
"sub sp, sp, #0x90\n\t"
"mov r5, sp\n\t"
"vmrs r6, fpscr\n\t"
"vstm r5, {d8-d15}\n\t"
"str r6, [r5, #0x80]\n\t"
"sub sp, sp, #0x160\n\t" /* sizeof(struct syscall_frame) + registers */
"ldr ip, [r4, #0x218]\n\t" /* thread_data->syscall_frame */
"str ip, [sp, #0x4c]\n\t" /* frame->prev_frame */
"str r7, [sp, #0x50]\n\t" /* frame->syscall_cfa */
"str sp, [r4, #0x218]\n\t" /* thread_data->syscall_frame */
"ldr r7, [r4, #0x21c]\n\t" /* thread_data->syscall_trace */
"cbnz r7, 1f\n\t"
/* switch to user stack */
"mov sp, r0\n\t"
"bx r3\n"
"1:\tmov r6, r0\n\t" /* user_sp */
"ldr r1, [r6]\n\t" /* args */
"ldr r2, [r6, #4]\n\t" /* len */
"ldr r0, [r6, #8]\n\t" /* id */
"str r0, [r5, #0x84]\n\t"
"mov r4, r3\n\t" /* func */
"bl " __ASM_NAME("trace_usercall") "\n\t"
"mov sp, r6\n\t"
"bx r4" )
/***********************************************************************
* user_mode_callback_return
*/
extern void DECLSPEC_NORETURN user_mode_callback_return( void *ret_ptr, ULONG ret_len,
NTSTATUS status, TEB *teb );
__ASM_GLOBAL_FUNC( user_mode_callback_return,
"ldr r4, [r3, #0x218]\n\t" /* thread_data->syscall_frame */
"ldr r5, [r4, #0x4c]\n\t" /* frame->prev_frame */
"str r5, [r3, #0x218]\n\t" /* thread_data->syscall_frame */
"add r5, r4, #0x160\n\t"
"vldm r5, {d8-d15}\n\t"
"ldr r6, [r5, #0x80]\n\t"
"vmsr fpscr, r6\n\t"
"ldr r7, [r3, #0x21c]\n\t" /* thread_data->syscall_trace */
"cbz r7, 1f\n\t"
"stm r5, {r0-r3}\n\t"
"ldr r3, [r5, #0x84]\n\t" /* id */
"bl " __ASM_NAME("trace_userret") "\n\t"
"ldm r5, {r0-r3}\n"
"1:\tadd r5, r5, #0x90\n\t"
"mov sp, r5\n\t"
"pop {r4-r7}\n\t" /* ret_ptr, ret_len, teb, exception_list */
"str r7, [r3]\n\t" /* teb->Tib.ExceptionList */
"str r0, [r4]\n\t" /* ret_ptr */
"str r1, [r5]\n\t" /* ret_len */
"mov r0, r2\n\t" /* status */
"pop {r4-r12,pc}" )
/***********************************************************************
* user_mode_abort_thread
*/
extern void DECLSPEC_NORETURN user_mode_abort_thread( NTSTATUS status, struct syscall_frame *frame );
__ASM_GLOBAL_FUNC( user_mode_abort_thread,
__ASM_EHABI(".cantunwind\n\t")
"ldr r7, [r1, #0x28]\n\t" /* frame->syscall_cfa */
"sub r7, r7, #0x28\n\t"
/* switch to kernel stack */
"mov sp, r7\n\t"
__ASM_CFI(".cfi_def_cfa 7,0x28\n\t")
__ASM_CFI(".cfi_offset r4,-0x28\n\t")
__ASM_CFI(".cfi_offset r5,-0x24\n\t")
__ASM_CFI(".cfi_offset r6,-0x20\n\t")
__ASM_CFI(".cfi_offset r7,-0x1c\n\t")
__ASM_CFI(".cfi_offset r8,-0x18\n\t")
__ASM_CFI(".cfi_offset r9,-0x14\n\t")
__ASM_CFI(".cfi_offset r10,-0x10\n\t")
__ASM_CFI(".cfi_offset r11,-0x0c\n\t")
__ASM_CFI(".cfi_offset r12,-0x08\n\t")
__ASM_CFI(".cfi_offset lr,-0x04\n\t")
"bl " __ASM_NAME("abort_thread") )
/***********************************************************************
* KeUserModeCallback
*/
NTSTATUS KeUserModeCallback( ULONG id, const void *args, ULONG len, void **ret_ptr, ULONG *ret_len )
{
struct syscall_frame *frame = get_syscall_frame();
ULONG sp = (frame->sp - offsetof( struct callback_stack_layout, args_data[len] ) - 8) & ~7;
struct callback_stack_layout *stack = (struct callback_stack_layout *)sp;
if ((char *)ntdll_get_thread_data()->kernel_stack + min_kernel_stack > (char *)&frame)
return STATUS_STACK_OVERFLOW;
stack->args = stack->args_data;
stack->len = len;
stack->id = id;
stack->lr = frame->lr;
stack->sp = frame->sp;
stack->pc = frame->pc;
memcpy( stack->args_data, args, len );
return call_user_mode_callback( sp, ret_ptr, ret_len, pKiUserCallbackDispatcher, NtCurrentTeb() );
}
/***********************************************************************
* NtCallbackReturn (NTDLL.@)
*/
NTSTATUS WINAPI NtCallbackReturn( void *ret_ptr, ULONG ret_len, NTSTATUS status )
{
if (!get_syscall_frame()->prev_frame) return STATUS_NO_CALLBACK_ACTIVE;
user_mode_callback_return( ret_ptr, ret_len, status, NtCurrentTeb() );
}
/***********************************************************************
* 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 = get_syscall_frame();
UINT i;
if (!is_inside_syscall( SP_sig(context) )) return FALSE;
TRACE( "code=%x flags=%x addr=%p pc=%08x\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress, (DWORD)PC_sig(context) );
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)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) = rec->ExceptionCode;
REGn_sig(1, context) = (DWORD)NtCurrentTeb();
REGn_sig(8, context) = (DWORD)frame;
PC_sig(context) = (DWORD)__wine_syscall_dispatcher_return;
}
if (PC_sig(context) & 1) CPSR_sig(context) |= 0x20;
else CPSR_sig(context) &= ~0x20;
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;
CONTEXT ctx;
rec.ExceptionAddress = (void *)PC_sig(context);
save_context( &ctx, sigcontext );
switch (get_trap_code(signal, context))
{
case TRAP_ARM_PRIVINFLT: /* Invalid opcode exception */
switch (get_udf_immediate( context ))
{
case 0xfb: /* __fastfail */
{
rec.ExceptionCode = STATUS_STACK_BUFFER_OVERRUN;
rec.ExceptionFlags = EXCEPTION_NONCONTINUABLE;
rec.NumberParameters = 1;
rec.ExceptionInformation[0] = ctx.R0;
NtRaiseException( &rec, &ctx, FALSE );
return;
}
case 0xfe: /* breakpoint */
ctx.Pc += 2; /* skip the breakpoint instruction */
rec.ExceptionCode = EXCEPTION_BREAKPOINT;
rec.NumberParameters = 1;
break;
default:
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
}
break;
case TRAP_ARM_PAGEFLT: /* Page fault */
rec.NumberParameters = 2;
if (get_error_code(context) & 0x80000000) rec.ExceptionInformation[0] = EXCEPTION_EXECUTE_FAULT;
else if (get_error_code(context) & 0x800) rec.ExceptionInformation[0] = EXCEPTION_WRITE_FAULT;
else rec.ExceptionInformation[0] = EXCEPTION_READ_FAULT;
rec.ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
if (!virtual_handle_fault( &rec, (void *)SP_sig(context) )) 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_raise_exception( context, &rec, &ctx );
}
/**********************************************************************
* trap_handler
*
* Handler for SIGTRAP.
*/
static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD rec = { 0 };
ucontext_t *context = sigcontext;
CONTEXT ctx;
rec.ExceptionAddress = (void *)PC_sig(context);
save_context( &ctx, sigcontext );
switch (siginfo->si_code)
{
case TRAP_TRACE:
rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
break;
case TRAP_BRKPT:
default:
ctx.Pc += 2; /* skip the breakpoint instruction */
rec.ExceptionCode = EXCEPTION_BREAKPOINT;
rec.NumberParameters = 1;
break;
}
setup_raise_exception( sigcontext, &rec, &ctx );
}
/**********************************************************************
* 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, EXCEPTION_NONCONTINUABLE };
setup_exception( sigcontext, &rec );
}
/**********************************************************************
* quit_handler
*
* Handler for SIGQUIT.
*/
static void quit_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
ucontext_t *ucontext = sigcontext;
if (!is_inside_syscall( SP_sig(ucontext) )) user_mode_abort_thread( 0, get_syscall_frame() );
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 )
{
ucontext_t *ucontext = sigcontext;
CONTEXT context;
if (is_inside_syscall( SP_sig(ucontext) ))
{
context.ContextFlags = CONTEXT_FULL | CONTEXT_EXCEPTION_REQUEST;
NtGetContextThread( GetCurrentThread(), &context );
wait_suspend( &context );
NtSetContextThread( GetCurrentThread(), &context );
}
else
{
save_context( &context, sigcontext );
context.ContextFlags |= CONTEXT_EXCEPTION_REPORTING;
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_process
*/
void signal_init_process(void)
{
struct sigaction sig_act;
struct ntdll_thread_data *thread_data = ntdll_get_thread_data();
void *kernel_stack = (char *)thread_data->kernel_stack + kernel_stack_size;
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);
}
/***********************************************************************
* init_syscall_frame
*/
void init_syscall_frame( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend, TEB *teb )
{
struct syscall_frame *frame = ((struct ntdll_thread_data *)&teb->GdiTebBatch)->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)
{
context.ContextFlags |= CONTEXT_EXCEPTION_REPORTING | CONTEXT_EXCEPTION_ACTIVE;
wait_suspend( &context );
}
ctx = (CONTEXT *)((ULONG_PTR)context.Sp & ~15) - 1;
*ctx = context;
ctx->ContextFlags = CONTEXT_FULL;
signal_set_full_context( ctx );
frame->sp = (DWORD)ctx;
frame->pc = (DWORD)pLdrInitializeThunk;
frame->r0 = (DWORD)ctx;
pthread_sigmask( SIG_UNBLOCK, &server_block_set, NULL );
}
/***********************************************************************
* signal_start_thread
*/
__ASM_GLOBAL_FUNC( signal_start_thread,
__ASM_EHABI(".cantunwind\n\t")
"push {r4-r12,lr}\n\t"
"add r7, sp, #0x28\n\t" /* syscall_cfa */
"mcr p15, 0, r3, c13, c0, 2\n\t" /* set teb register */
/* set syscall frame */
"ldr r6, [r3, #0x218]\n\t" /* thread_data->syscall_frame */
"cbnz r6, 1f\n\t"
"sub r6, sp, #0x160\n\t" /* sizeof(struct syscall_frame) */
"str r6, [r3, #0x218]\n\t" /* thread_data->syscall_frame */
"1:\tmov r4, #0\n\t"
"str r4, [r6, #0x44]\n\t" /* frame->restore_flags */
"str r4, [r6, #0x4c]\n\t" /* frame->prev_frame */
"str r7, [r6, #0x50]\n\t" /* frame->syscall_cfa */
/* switch to kernel stack */
"mov sp, r6\n\t"
"mov r8, r6\n\t"
"bl init_syscall_frame\n\t"
"b " __ASM_LOCAL_LABEL("__wine_syscall_dispatcher_return") )
/***********************************************************************
* __wine_syscall_dispatcher
*/
__ASM_GLOBAL_FUNC( __wine_syscall_dispatcher,
__ASM_EHABI(".cantunwind\n\t")
"mrc p15, 0, r2, c13, c0, 2\n\t" /* NtCurrentTeb() */
"ldr r1, [r2, #0x218]\n\t" /* 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 */
"vmrs r0, fpscr\n\t"
"str r0, [r1, #0x48]\n\t"
"str ip, [r1, #0x54]\n\t" /* frame->syscall_id */
"add r0, r1, #0x60\n\t"
"vstm r0, {d0-d15}\n\t"
"mov r6, sp\n\t"
"mov r8, r1\n\t"
/* switch to kernel stack */
"mov sp, r1\n\t"
__ASM_CFI_CFA_IS_AT2(r8, 0xd0, 0x00) /* frame->syscall_cfa */
__ASM_CFI(".cfi_offset r4,-0x28\n\t")
__ASM_CFI(".cfi_offset r5,-0x24\n\t")
__ASM_CFI(".cfi_offset r6,-0x20\n\t")
__ASM_CFI(".cfi_offset r7,-0x1c\n\t")
__ASM_CFI(".cfi_offset r8,-0x18\n\t")
__ASM_CFI(".cfi_offset r9,-0x14\n\t")
__ASM_CFI(".cfi_offset r10,-0x10\n\t")
__ASM_CFI(".cfi_offset r11,-0x0c\n\t")
__ASM_CFI(".cfi_offset r12,-0x08\n\t")
__ASM_CFI(".cfi_offset lr,-0x04\n\t")
"ldr r5, [r2, #0x214]\n\t" /* thread_data->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 " __ASM_LOCAL_LABEL("bad_syscall") "\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"
"ldr r5, [r4]\n\t" /* table->ServiceTable */
"ldr r5, [r5, ip, lsl #2]\n\t"
"ldr r7, [r2, #0x21c]\n\t" /* thread_data->syscall_trace */
"cbnz r7, " __ASM_LOCAL_LABEL("trace_syscall") "\n\t"
"pop {r0-r3}\n\t" /* first 4 args are in registers */
"blx r5\n"
__ASM_LOCAL_LABEL("__wine_syscall_dispatcher_return") ":\n\t"
"ldr ip, [r8, #0x44]\n\t" /* frame->restore_flags */
"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"
"tst ip, #2\n\t" /* CONTEXT_INTEGER */
"it ne\n\t"
"ldmne r8, {r0-r3}\n\t"
"ldr lr, [r8, #0x3c]\n\t"
/* switch to user stack */
"ldr sp, [r8, #0x38]\n\t"
"add r8, r8, #0x10\n\t"
"ldm r8, {r4-r12,pc}\n"
__ASM_LOCAL_LABEL("trace_syscall") ":\n\t"
"ldr r0, [r8, #0x54]\n\t" /* frame->syscall_id */
"mov r1, sp\n\t" /* args */
"ldr r2, [r4, #12]\n\t" /* table->ArgumentTable */
"ubfx ip, r0, #0, #12\n\t" /* syscall number */
"ldrb r2, [r2, ip]\n\t" /* len */
"bl " __ASM_NAME("trace_syscall") "\n\t"
"pop {r0-r3}\n\t"
"blx r5\n"
__ASM_LOCAL_LABEL("trace_syscall_ret") ":\n\t"
"mov r6, r0\n\t" /* retval */
"ldr r0, [r8, #0x54]\n\t" /* frame->syscall_id */
"mov r1, r6\n\t" /* retval */
"bl " __ASM_NAME("trace_sysret") "\n\t"
"mov r0, r6\n\t" /* status */
"b " __ASM_LOCAL_LABEL("__wine_syscall_dispatcher_return") "\n"
__ASM_LOCAL_LABEL("bad_syscall") ":\n\t"
"movw r0, #0x001c\n\t" /* STATUS_INVALID_SYSTEM_SERVICE */
"movt r0, #0xc000\n\t"
"b " __ASM_LOCAL_LABEL("__wine_syscall_dispatcher_return") )
__ASM_GLOBAL_FUNC( __wine_syscall_dispatcher_return,
"mov sp, r8\n\t"
"ldr r3, [r1, #0x21c]\n\t" /* thread_data->syscall_trace */
"cbnz r3, 1f\n\t"
"b " __ASM_LOCAL_LABEL("__wine_syscall_dispatcher_return") "\n"
"1:\tb " __ASM_LOCAL_LABEL("trace_syscall_ret") )
/***********************************************************************
* __wine_unix_call_dispatcher
*/
__ASM_GLOBAL_FUNC( __wine_unix_call_dispatcher,
__ASM_EHABI(".cantunwind\n\t")
"mrc p15, 0, r1, c13, c0, 2\n\t" /* NtCurrentTeb() */
"ldr r1, [r1, #0x218]\n\t" /* thread_data->syscall_frame */
"add ip, r1, #0x10\n\t"
"stm ip, {r4-r12,lr}\n\t"
"str sp, [r1, #0x38]\n\t"
"str lr, [r1, #0x3c]\n\t"
"mrs r4, CPSR\n\t"
"bfi r4, lr, #5, #1\n\t" /* set thumb bit */
"str r4, [r1, #0x40]\n\t"
"mov r4, #0\n\t"
"str r4, [r1, #0x44]\n\t" /* frame->restore_flags */
"vmrs r4, fpscr\n\t"
"str r4, [r1, #0x48]\n\t"
"add r4, r1, #0x60\n\t"
"vstm r4, {d0-d15}\n\t"
"ldr ip, [r0, r2, lsl #2]\n\t"
"mov r8, r1\n\t"
/* switch to kernel stack */
"mov sp, r1\n\t"
__ASM_CFI_CFA_IS_AT2(r8, 0xd0, 0x00) /* frame->syscall_cfa */
__ASM_CFI(".cfi_offset r4,-0x28\n\t")
__ASM_CFI(".cfi_offset r5,-0x24\n\t")
__ASM_CFI(".cfi_offset r6,-0x20\n\t")
__ASM_CFI(".cfi_offset r7,-0x1c\n\t")
__ASM_CFI(".cfi_offset r8,-0x18\n\t")
__ASM_CFI(".cfi_offset r9,-0x14\n\t")
__ASM_CFI(".cfi_offset r10,-0x10\n\t")
__ASM_CFI(".cfi_offset r11,-0x0c\n\t")
__ASM_CFI(".cfi_offset r12,-0x08\n\t")
__ASM_CFI(".cfi_offset lr,-0x04\n\t")
"mov r0, r3\n\t" /* args */
"blx ip\n"
"ldr r1, [r8, #0x44]\n\t" /* frame->restore_flags */
"cbnz r1, 1f\n\t"
/* switch to user stack */
"ldr sp, [r8, #0x38]\n\t"
"add r8, r8, #0x10\n\t"
"ldm r8, {r4-r12,pc}\n\t"
"1:\tb " __ASM_LOCAL_LABEL("__wine_syscall_dispatcher_return") )
#endif /* __arm__ */
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