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ntdll: Save/restore FPU context in arm64 signal handlers. 

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=51996
Signed-off-by: Jinoh Kang <jinoh.kang.kr@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jinoh Kang 2021-11-24 17:33:12 +09:00 committed by Alexandre Julliard
parent 6747ecdefd
commit 9f0df41a6c
1 changed files with 65 additions and 50 deletions
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115
dlls/ntdll/unix/signal_arm64.c
View File

@ -84,7 +84,7 @@ WINE_DEFAULT_DEBUG_CHANNEL(seh);
# define FP_sig(context) REGn_sig(29, context) /* Frame pointer */
# define LR_sig(context) REGn_sig(30, context) /* Link Register */
static struct _aarch64_ctx *get_extended_sigcontext( ucontext_t *sigcontext, unsigned int magic )
static struct _aarch64_ctx *get_extended_sigcontext( const ucontext_t *sigcontext, unsigned int magic )
{
struct _aarch64_ctx *ctx = (struct _aarch64_ctx *)sigcontext->uc_mcontext.__reserved;
while ((char *)ctx < (char *)(&sigcontext->uc_mcontext + 1) && ctx->magic && ctx->size)
@ -95,7 +95,7 @@ static struct _aarch64_ctx *get_extended_sigcontext( ucontext_t *sigcontext, uns
return NULL;
}
static struct fpsimd_context *get_fpsimd_context( ucontext_t *sigcontext )
static struct fpsimd_context *get_fpsimd_context( const ucontext_t *sigcontext )
{
return (struct fpsimd_context *)get_extended_sigcontext( sigcontext, FPSIMD_MAGIC );
}
@ -324,50 +324,12 @@ NTSTATUS CDECL unwind_builtin_dll( ULONG type, DISPATCHER_CONTEXT *dispatch, CON
}
/***********************************************************************
* save_context
*
* Set the register values from a sigcontext.
*/
static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
{
DWORD i;
context->ContextFlags = (CONTEXT_FULL & ~CONTEXT_FLOATING_POINT) |
CONTEXT_ARM64;
context->u.s.Fp = FP_sig(sigcontext); /* Frame pointer */
context->u.s.Lr = LR_sig(sigcontext); /* Link register */
context->Sp = SP_sig(sigcontext); /* Stack pointer */
context->Pc = PC_sig(sigcontext); /* Program Counter */
context->Cpsr = PSTATE_sig(sigcontext); /* Current State Register */
for (i = 0; i <= 28; i++) context->u.X[i] = REGn_sig( i, sigcontext );
}
/***********************************************************************
* restore_context
*
* Build a sigcontext from the register values.
*/
static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
{
DWORD i;
FP_sig(sigcontext) = context->u.s.Fp; /* Frame pointer */
LR_sig(sigcontext) = context->u.s.Lr; /* Link register */
SP_sig(sigcontext) = context->Sp; /* Stack pointer */
PC_sig(sigcontext) = context->Pc; /* Program Counter */
PSTATE_sig(sigcontext) = context->Cpsr; /* Current State Register */
for (i = 0; i <= 28; i++) REGn_sig( i, sigcontext ) = context->u.X[i];
}
/***********************************************************************
* save_fpu
*
* Set the FPU context from a sigcontext.
*/
static void save_fpu( CONTEXT *context, ucontext_t *sigcontext )
static void save_fpu( CONTEXT *context, const ucontext_t *sigcontext )
{
#ifdef linux
struct fpsimd_context *fp = get_fpsimd_context( sigcontext );
@ -391,23 +353,62 @@ static void save_fpu( CONTEXT *context, ucontext_t *sigcontext )
*
* Restore the FPU context to a sigcontext.
*/
static void restore_fpu( struct syscall_frame *frame, ucontext_t *sigcontext )
static void restore_fpu( const CONTEXT *context, ucontext_t *sigcontext )
{
#ifdef linux
struct fpsimd_context *fp = get_fpsimd_context( sigcontext );
if (!fp) return;
fp->fpcr = frame->fpcr;
fp->fpsr = frame->fpsr;
memcpy( fp->vregs, frame->v, sizeof(fp->vregs) );
fp->fpcr = context->Fpcr;
fp->fpsr = context->Fpsr;
memcpy( fp->vregs, context->V, sizeof(fp->vregs) );
#elif defined(__APPLE__)
sigcontext->uc_mcontext->__ns.__fpcr = frame->fpcr;
sigcontext->uc_mcontext->__ns.__fpsr = frame->fpsr;
memcpy( sigcontext->uc_mcontext->__ns.__v, frame->v, sizeof(frame->v) );
sigcontext->uc_mcontext->__ns.__fpcr = context->Fpcr;
sigcontext->uc_mcontext->__ns.__fpsr = context->Fpsr;
memcpy( sigcontext->uc_mcontext->__ns.__v, context->V, sizeof(context->v) );
#endif
}
/***********************************************************************
* save_context
*
* Set the register values from a sigcontext.
*/
static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
{
DWORD i;
context->ContextFlags = CONTEXT_FULL;
context->u.s.Fp = FP_sig(sigcontext); /* Frame pointer */
context->u.s.Lr = LR_sig(sigcontext); /* Link register */
context->Sp = SP_sig(sigcontext); /* Stack pointer */
context->Pc = PC_sig(sigcontext); /* Program Counter */
context->Cpsr = PSTATE_sig(sigcontext); /* Current State Register */
for (i = 0; i <= 28; i++) context->u.X[i] = REGn_sig( i, sigcontext );
save_fpu( context, sigcontext );
}
/***********************************************************************
* restore_context
*
* Build a sigcontext from the register values.
*/
static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
{
DWORD i;
FP_sig(sigcontext) = context->u.s.Fp; /* Frame pointer */
LR_sig(sigcontext) = context->u.s.Lr; /* Link register */
SP_sig(sigcontext) = context->Sp; /* Stack pointer */
PC_sig(sigcontext) = context->Pc; /* Program Counter */
PSTATE_sig(sigcontext) = context->Cpsr; /* Current State Register */
for (i = 0; i <= 28; i++) REGn_sig( i, sigcontext ) = context->u.X[i];
restore_fpu( context, sigcontext );
}
/***********************************************************************
* signal_set_full_context
*/
@ -632,7 +633,6 @@ static void setup_exception( ucontext_t *sigcontext, EXCEPTION_RECORD *rec )
rec->ExceptionAddress = (void *)PC_sig(sigcontext);
save_context( &context, sigcontext );
save_fpu( &context, sigcontext );
status = send_debug_event( rec, &context, TRUE );
if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
@ -1056,7 +1056,22 @@ static void usr2_handler( int signal, siginfo_t *siginfo, void *sigcontext )
PC_sig(context) = frame->pc;
PSTATE_sig(context) = frame->cpsr;
for (i = 0; i <= 28; i++) REGn_sig( i, context ) = frame->x[i];
restore_fpu( frame, context );
#ifdef linux
{
struct fpsimd_context *fp = get_fpsimd_context( sigcontext );
if (fp)
{
fp->fpcr = frame->fpcr;
fp->fpsr = frame->fpsr;
memcpy( fp->vregs, frame->v, sizeof(fp->vregs) );
}
}
#elif defined(__APPLE__)
sigcontext->uc_mcontext->__ns.__fpcr = frame->fpcr;
sigcontext->uc_mcontext->__ns.__fpsr = frame->fpsr;
memcpy( sigcontext->uc_mcontext->__ns.__v, frame->v, sizeof(frame->v) );
#endif
}