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ntdll: Add support for FPU registers in signal context on ARM. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2020-07-15 10:23:34 +02:00
parent 99851ca4c2
commit f30ba2cf25
1 changed files with 48 additions and 25 deletions
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73
dlls/ntdll/unix/signal_arm.c
View File

@ -104,6 +104,48 @@ typedef struct ucontext
# 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 */
@ -117,6 +159,9 @@ typedef struct ucontext
# 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
@ -200,6 +245,7 @@ static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
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 */
save_fpu( context, sigcontext );
}
@ -216,33 +262,12 @@ static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
#undef C
SP_sig(sigcontext) = context->Sp; /* Stack pointer */
LR_sig(sigcontext) = context->Lr ; /* Link register */
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 */
}
/***********************************************************************
* save_fpu
*
* Set the FPU context from a sigcontext.
*/
static inline void save_fpu( CONTEXT *context, const ucontext_t *sigcontext )
{
FIXME("not implemented\n");
}
/***********************************************************************
* restore_fpu
*
* Restore the FPU context to a sigcontext.
*/
static inline void restore_fpu( CONTEXT *context, const ucontext_t *sigcontext )
{
FIXME("not implemented\n");
restore_fpu( context, sigcontext );
}
@ -661,7 +686,6 @@ static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
CONTEXT context;
NTSTATUS status;
save_fpu( &context, sigcontext );
save_context( &context, sigcontext );
switch (siginfo->si_code & 0xffff )
@ -716,7 +740,6 @@ static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
if (status) RtlRaiseStatus( status );
restore_context( &context, sigcontext );
restore_fpu( &context, sigcontext );
}