static inline void __user *get_sigframe(struct ksignal *ksig,
struct pt_regs *regs, int framesize)
{
unsigned long sp;
/* Default to using normal stack */
sp = regs->sp;
/*
* If we are on the alternate signal stack and would overflow it, don't.
* Return an always-bogus address instead so we will die with SIGSEGV.
*/
if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize)))
return (void __user __force *)(-1UL);
/* This is the X/Open sanctioned signal stack switching. */
sp = (sigsp(sp, ksig) - framesize);
/*
* nds32 mandates 8-byte alignment
*/
sp &= ~0x7UL;
return (void __user *)sp;
}
/*
* Determine which stack to use..
*/
static void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs,
size_t frame_size,
void __user **fpstate)
{
unsigned long sp;
/* Default to using normal stack */
sp = regs->sp;
/* This is the X/Open sanctioned signal stack switching. */
if (ksig->ka.sa.sa_flags & SA_ONSTACK)
sp = sigsp(sp, ksig);
/* This is the legacy signal stack switching. */
else if ((regs->ss & 0xffff) != __USER32_DS &&
!(ksig->ka.sa.sa_flags & SA_RESTORER) &&
ksig->ka.sa.sa_restorer)
sp = (unsigned long) ksig->ka.sa.sa_restorer;
if (used_math()) {
unsigned long fx_aligned, math_size;
sp = alloc_mathframe(sp, 1, &fx_aligned, &math_size);
*fpstate = (struct _fpstate_ia32 __user *) sp;
if (save_xstate_sig(*fpstate, (void __user *)fx_aligned,
math_size) < 0)
return (void __user *) -1L;
}
sp -= frame_size;
/* Align the stack pointer according to the i386 ABI,
* i.e. so that on function entry ((sp + 4) & 15) == 0. */
sp = ((sp - 12) & -16ul) - 4;
return (void __user *) sp;
}
/*
* Determine which stack to use..
*/
static inline void __user *get_sigframe(struct ksignal *ksig,
struct pt_regs *regs, size_t frame_size)
{
unsigned long sp = sigsp(regs->sp, ksig);
return (void __user *)((sp - frame_size) & ~7UL);
}
/*
* Determine which stack to use..
*/
static void __user *get_sigframe(struct ksignal *ksig, unsigned long sp)
{
sp = sigsp(sp, ksig);
sp = (sp + 7) & ~7; /* 8byte align stack */
return (void __user *)sp;
}
/*
* Determine which stack to use..
*/
static inline void __user *
get_sigframe(struct ksignal *ksig, struct pt_regs *regs, size_t frame_size)
{
/* Default to using normal stack */
unsigned long sp = sigsp(regs->r1, ksig);
return (void __user *)((sp - frame_size) & -8UL);
}
/*
* Determine which stack to use..
*/
static inline void __user *get_sigframe(struct ksignal *ksig,
size_t frame_size)
{
unsigned long sp = sigsp(__frame->sp, ksig);
return (void __user *) ((sp - frame_size) & ~7UL);
} /* end get_sigframe() */
static inline void __user *
get_sigframe(struct ksignal *ksig, size_t frame_size)
{
unsigned long sp = sigsp(rdusp(), ksig);
/* make sure the frame is dword-aligned */
sp &= ~3;
return (void __user*)(sp - frame_size);
}
static inline void __user *get_sigframe(struct ksignal *ksig,
struct pt_regs *regs, size_t frame_size)
{
unsigned long sp = regs->sp;
/* redzone */
sp -= STACK_FRAME_OVERHEAD;
sp = sigsp(sp, ksig);
sp = align_sigframe(sp - frame_size);
return (void __user *)sp;
}
static inline void __user *
get_sigframe(struct ksignal *ksig, struct pt_regs *regs, int framesize)
{
unsigned long sp = sigsp(regs->ARM_sp, ksig);
void __user *frame;
/*
* ATPCS B01 mandates 8-byte alignment
*/
frame = (void __user *)((sp - framesize) & ~7);
/*
* Check that we can actually write to the signal frame.
*/
if (!access_ok(VERIFY_WRITE, frame, framesize))
frame = NULL;
return frame;
}
static struct rt_sigframe __user *get_sigframe(struct ksignal *ksig,
struct pt_regs *regs)
{
unsigned long sp, sp_top;
struct rt_sigframe __user *frame;
sp = sp_top = sigsp(regs->sp, ksig);
sp = (sp - sizeof(struct rt_sigframe)) & ~15;
frame = (struct rt_sigframe __user *)sp;
/*
* Check that we can actually write to the signal frame.
*/
if (!access_ok(VERIFY_WRITE, frame, sp_top - sp))
frame = NULL;
return frame;
}
void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs,
size_t frame_size)
{
unsigned long sp;
/* Default to using normal stack */
sp = regs->regs[29];
/*
* FPU emulator may have it's own trampoline active just
* above the user stack, 16-bytes before the next lowest
* 16 byte boundary. Try to avoid trashing it.
*/
sp -= 32;
sp = sigsp(sp, ksig);
return (void __user *)((sp - frame_size) & (ICACHE_REFILLS_WORKAROUND_WAR ? ~(cpu_icache_line_size()-1) : ALMASK));
}
static inline void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, unsigned long framesize)
{
unsigned long sp = regs->u_regs[UREG_FP] + STACK_BIAS;
/*
* If we are on the alternate signal stack and would overflow it, don't.
* Return an always-bogus address instead so we will die with SIGSEGV.
*/
if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize)))
return (void __user *) -1L;
/* This is the X/Open sanctioned signal stack switching. */
sp = sigsp(sp, ksig) - framesize;
/* Always align the stack frame. This handles two cases. First,
* sigaltstack need not be mindful of platform specific stack
* alignment. Second, if we took this signal because the stack
* is not aligned properly, we'd like to take the signal cleanly
* and report that.
*/
sp &= ~15UL;
return (void __user *) sp;
}
/*
* Determine which stack to use..
*/
static inline void __user *
get_sigframe(struct ksignal *ksig, unsigned long sp, size_t frame_size)
{
return (void __user *)((sigsp(sp, ksig) - frame_size) & -8ul);
}
static inline void __user *
get_sigframe(struct ksignal *ksig, struct pt_regs *regs, size_t frame_size)
{
return (void __user *)((sigsp(rdusp(), ksig) - frame_size) & -8UL);
}
