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wine-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 "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"
static pthread_key_t teb_key;
/***********************************************************************
* set_cpu_context
*
* Set the new CPU context.
*/
void DECLSPEC_HIDDEN set_cpu_context( const CONTEXT *context );
__ASM_GLOBAL_FUNC( set_cpu_context,
".arm\n\t"
"ldr r2, [r0, #0x44]\n\t" /* context->Cpsr */
"tst r2, #0x20\n\t" /* thumb? */
"ldr r1, [r0, #0x40]\n\t" /* context->Pc */
"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"
"ldmib r0, {r0-r12}\n\t" /* context->R0..R12 */
"pop {pc}" )
/***********************************************************************
* get_server_context_flags
*
* Convert CPU-specific flags to generic server flags
*/
static unsigned int get_server_context_flags( DWORD flags )
{
unsigned int ret = 0;
flags &= ~CONTEXT_ARM; /* get rid of CPU id */
if (flags & CONTEXT_CONTROL) ret |= SERVER_CTX_CONTROL;
if (flags & CONTEXT_INTEGER) ret |= SERVER_CTX_INTEGER;
if (flags & CONTEXT_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT;
if (flags & CONTEXT_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS;
return ret;
}
/***********************************************************************
* copy_context
*
* Copy a register context according to the flags.
*/
static void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags )
{
flags &= ~CONTEXT_ARM; /* get rid of CPU id */
if (flags & CONTEXT_CONTROL)
{
to->Sp = from->Sp;
to->Lr = from->Lr;
to->Pc = from->Pc;
to->Cpsr = from->Cpsr;
}
if (flags & CONTEXT_INTEGER)
{
to->R0 = from->R0;
to->R1 = from->R1;
to->R2 = from->R2;
to->R3 = from->R3;
to->R4 = from->R4;
to->R5 = from->R5;
to->R6 = from->R6;
to->R7 = from->R7;
to->R8 = from->R8;
to->R9 = from->R9;
to->R10 = from->R10;
to->R11 = from->R11;
to->R12 = from->R12;
}
if (flags & CONTEXT_FLOATING_POINT)
{
to->Fpscr = from->Fpscr;
memcpy( to->u.D, from->u.D, sizeof(to->u.D) );
}
}
/***********************************************************************
* context_to_server
*
* Convert a register context to the server format.
*/
NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
{
DWORD i, flags = from->ContextFlags & ~CONTEXT_ARM; /* get rid of CPU id */
memset( to, 0, sizeof(*to) );
to->cpu = CPU_ARM;
if (flags & CONTEXT_CONTROL)
{
to->flags |= SERVER_CTX_CONTROL;
to->ctl.arm_regs.sp = from->Sp;
to->ctl.arm_regs.lr = from->Lr;
to->ctl.arm_regs.pc = from->Pc;
to->ctl.arm_regs.cpsr = from->Cpsr;
}
if (flags & CONTEXT_INTEGER)
{
to->flags |= SERVER_CTX_INTEGER;
to->integer.arm_regs.r[0] = from->R0;
to->integer.arm_regs.r[1] = from->R1;
to->integer.arm_regs.r[2] = from->R2;
to->integer.arm_regs.r[3] = from->R3;
to->integer.arm_regs.r[4] = from->R4;
to->integer.arm_regs.r[5] = from->R5;
to->integer.arm_regs.r[6] = from->R6;
to->integer.arm_regs.r[7] = from->R7;
to->integer.arm_regs.r[8] = from->R8;
to->integer.arm_regs.r[9] = from->R9;
to->integer.arm_regs.r[10] = from->R10;
to->integer.arm_regs.r[11] = from->R11;
to->integer.arm_regs.r[12] = from->R12;
}
if (flags & CONTEXT_FLOATING_POINT)
{
to->flags |= SERVER_CTX_FLOATING_POINT;
for (i = 0; i < 32; i++) to->fp.arm_regs.d[i] = from->u.D[i];
to->fp.arm_regs.fpscr = from->Fpscr;
}
if (flags & CONTEXT_DEBUG_REGISTERS)
{
to->flags |= SERVER_CTX_DEBUG_REGISTERS;
for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->debug.arm_regs.bvr[i] = from->Bvr[i];
for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->debug.arm_regs.bcr[i] = from->Bcr[i];
for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->debug.arm_regs.wvr[i] = from->Wvr[i];
for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->debug.arm_regs.wcr[i] = from->Wcr[i];
}
return STATUS_SUCCESS;
}
/***********************************************************************
* context_from_server
*
* Convert a register context from the server format.
*/
NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
{
DWORD i;
if (from->cpu != CPU_ARM) return STATUS_INVALID_PARAMETER;
to->ContextFlags = CONTEXT_ARM;
if (from->flags & SERVER_CTX_CONTROL)
{
to->ContextFlags |= CONTEXT_CONTROL;
to->Sp = from->ctl.arm_regs.sp;
to->Lr = from->ctl.arm_regs.lr;
to->Pc = from->ctl.arm_regs.pc;
to->Cpsr = from->ctl.arm_regs.cpsr;
}
if (from->flags & SERVER_CTX_INTEGER)
{
to->ContextFlags |= CONTEXT_INTEGER;
to->R0 = from->integer.arm_regs.r[0];
to->R1 = from->integer.arm_regs.r[1];
to->R2 = from->integer.arm_regs.r[2];
to->R3 = from->integer.arm_regs.r[3];
to->R4 = from->integer.arm_regs.r[4];
to->R5 = from->integer.arm_regs.r[5];
to->R6 = from->integer.arm_regs.r[6];
to->R7 = from->integer.arm_regs.r[7];
to->R8 = from->integer.arm_regs.r[8];
to->R9 = from->integer.arm_regs.r[9];
to->R10 = from->integer.arm_regs.r[10];
to->R11 = from->integer.arm_regs.r[11];
to->R12 = from->integer.arm_regs.r[12];
}
if (from->flags & SERVER_CTX_FLOATING_POINT)
{
to->ContextFlags |= CONTEXT_FLOATING_POINT;
for (i = 0; i < 32; i++) to->u.D[i] = from->fp.arm_regs.d[i];
to->Fpscr = from->fp.arm_regs.fpscr;
}
if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
{
to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->Bvr[i] = from->debug.arm_regs.bvr[i];
for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->Bcr[i] = from->debug.arm_regs.bcr[i];
for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->Wvr[i] = from->debug.arm_regs.wvr[i];
for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->Wcr[i] = from->debug.arm_regs.wcr[i];
}
return STATUS_SUCCESS;
}
/***********************************************************************
* NtSetContextThread (NTDLL.@)
* ZwSetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
{
NTSTATUS ret;
BOOL self;
context_t server_context;
context_to_server( &server_context, context );
ret = set_thread_context( handle, &server_context, &self );
if (self && ret == STATUS_SUCCESS) set_cpu_context( context );
return ret;
}
/***********************************************************************
* NtGetContextThread (NTDLL.@)
* ZwGetContextThread (NTDLL.@)
*/
NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
{
NTSTATUS ret;
DWORD needed_flags = context->ContextFlags;
BOOL self = (handle == GetCurrentThread());
if (!self)
{
context_t server_context;
unsigned int server_flags = get_server_context_flags( context->ContextFlags );
if ((ret = get_thread_context( handle, &server_context, server_flags, &self ))) return ret;
if ((ret = context_from_server( context, &server_context ))) return ret;
needed_flags &= ~context->ContextFlags;
}
if (self && needed_flags)
{
CONTEXT ctx;
RtlCaptureContext( &ctx );
copy_context( context, &ctx, ctx.ContextFlags & needed_flags );
context->ContextFlags |= ctx.ContextFlags & needed_flags;
}
return STATUS_SUCCESS;
}
/**********************************************************************
* get_thread_ldt_entry
*/
NTSTATUS CDECL 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)
{
pthread_key_create( &teb_key, NULL );
}
/**********************************************************************
* 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 )
{
#if defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_8A__)
/* Win32/ARM applications expect the TEB pointer to be in the TPIDRURW register. */
__asm__ __volatile__( "mcr p15, 0, %0, c13, c0, 2" : : "r" (teb) );
#endif
pthread_setspecific( teb_key, teb );
}
/***********************************************************************
* init_thread_context
*/
static void init_thread_context( CONTEXT *context, LPTHREAD_START_ROUTINE entry, void *arg, void *relay )
{
context->R0 = (DWORD)entry;
context->R1 = (DWORD)arg;
context->Sp = (DWORD)NtCurrentTeb()->Tib.StackBase;
context->Pc = (DWORD)relay;
}
/***********************************************************************
* attach_thread
*/
PCONTEXT DECLSPEC_HIDDEN attach_thread( LPTHREAD_START_ROUTINE entry, void *arg,
BOOL suspend, void *relay )
{
CONTEXT *ctx;
if (suspend)
{
CONTEXT context = { CONTEXT_ALL };
init_thread_context( &context, entry, arg, relay );
wait_suspend( &context );
ctx = (CONTEXT *)((ULONG_PTR)context.Sp & ~15) - 1;
*ctx = context;
}
else
{
ctx = (CONTEXT *)NtCurrentTeb()->Tib.StackBase - 1;
init_thread_context( ctx, entry, arg, relay );
}
ctx->ContextFlags = CONTEXT_FULL;
LdrInitializeThunk( ctx, (void **)&ctx->R0, 0, 0 );
return ctx;
}
/***********************************************************************
* signal_start_thread
*/
__ASM_GLOBAL_FUNC( signal_start_thread,
".arm\n\t"
"push {r4-r12,lr}\n\t"
/* store exit frame */
"ldr r4, [sp, #40]\n\t" /* teb */
"str sp, [r4, #0x1d4]\n\t" /* teb->SystemReserved2 */
/* switch to thread stack */
"ldr r4, [r4, #4]\n\t" /* teb->Tib.StackBase */
"sub sp, r4, #0x1000\n\t"
/* attach dlls */
"bl " __ASM_NAME("attach_thread") "\n\t"
"mov sp, r0\n\t"
/* clear the stack */
"and r0, #~0xff0\n\t" /* round down to page size */
"bl " __ASM_NAME("virtual_clear_thread_stack") "\n\t"
/* switch to the initial context */
"mov r0, sp\n\t"
"b " __ASM_NAME("set_cpu_context") )
extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), TEB *teb );
__ASM_GLOBAL_FUNC( call_thread_exit_func,
".arm\n\t"
"ldr r3, [r2, #0x1d4]\n\t" /* teb->SystemReserved2 */
"mov ip, #0\n\t"
"str ip, [r2, #0x1d4]\n\t"
"cmp r3, ip\n\t"
"movne sp, r3\n\t"
"blx r1" )
/***********************************************************************
* signal_exit_thread
*/
void signal_exit_thread( int status, void (*func)(int) )
{
call_thread_exit_func( status, func, NtCurrentTeb() );
}
/**********************************************************************
* NtCurrentTeb (NTDLL.@)
*/
TEB * WINAPI NtCurrentTeb(void)
{
return pthread_getspecific( teb_key );
}
#endif /* __arm__ */
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