[deliverable/linux.git] / arch / sparc / kernel / kstack.h

#ifndef _KSTACK_H
#define _KSTACK_H

#include <linux/thread_info.h>
#include <linux/sched.h>
#include <asm/ptrace.h>
#include <asm/irq.h>

/* SP must be STACK_BIAS adjusted already.  */
static inline bool kstack_valid(struct thread_info *tp, unsigned long sp)
{
	unsigned long base = (unsigned long) tp;

	if (sp >= (base + sizeof(struct thread_info)) &&
	    sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
		return true;

	if (hardirq_stack[tp->cpu]) {
		base = (unsigned long) hardirq_stack[tp->cpu];
		if (sp >= base &&
		    sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
			return true;
		base = (unsigned long) softirq_stack[tp->cpu];
		if (sp >= base &&
		    sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
			return true;
	}
	return false;
}

/* Does "regs" point to a valid pt_regs trap frame?  */
static inline bool kstack_is_trap_frame(struct thread_info *tp, struct pt_regs *regs)
{
	unsigned long base = (unsigned long) tp;
	unsigned long addr = (unsigned long) regs;

	if (addr >= base &&
	    addr <= (base + THREAD_SIZE - sizeof(*regs)))
		goto check_magic;

	if (hardirq_stack[tp->cpu]) {
		base = (unsigned long) hardirq_stack[tp->cpu];
		if (addr >= base &&
		    addr <= (base + THREAD_SIZE - sizeof(*regs)))
			goto check_magic;
		base = (unsigned long) softirq_stack[tp->cpu];
		if (addr >= base &&
		    addr <= (base + THREAD_SIZE - sizeof(*regs)))
			goto check_magic;
	}
	return false;

check_magic:
	if ((regs->magic & ~0x1ff) == PT_REGS_MAGIC)
		return true;
	return false;

}

#endif /* _KSTACK_H */
Commit	Line	Data
4f70f7a9 DM	1	#ifndef _KSTACK_H
	2	#define _KSTACK_H
	3
	4	#include <linux/thread_info.h>
	5	#include <linux/sched.h>
	6	#include <asm/ptrace.h>
	7	#include <asm/irq.h>
	8
	9	/* SP must be STACK_BIAS adjusted already. */
	10	static inline bool kstack_valid(struct thread_info *tp, unsigned long sp)
	11	{
	12	unsigned long base = (unsigned long) tp;
	13
	14	if (sp >= (base + sizeof(struct thread_info)) &&
	15	sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
	16	return true;
	17
6f63e781 DM	18	if (hardirq_stack[tp->cpu]) {
	19	base = (unsigned long) hardirq_stack[tp->cpu];
	20	if (sp >= base &&
	21	sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
	22	return true;
	23	base = (unsigned long) softirq_stack[tp->cpu];
	24	if (sp >= base &&
	25	sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
	26	return true;
	27	}
4f70f7a9 DM	28	return false;
	29	}
	30
	31	/* Does "regs" point to a valid pt_regs trap frame? */
	32	static inline bool kstack_is_trap_frame(struct thread_info tp, struct pt_regs regs)
	33	{
	34	unsigned long base = (unsigned long) tp;
	35	unsigned long addr = (unsigned long) regs;
	36
	37	if (addr >= base &&
	38	addr <= (base + THREAD_SIZE - sizeof(*regs)))
	39	goto check_magic;
	40
6f63e781 DM	41	if (hardirq_stack[tp->cpu]) {
	42	base = (unsigned long) hardirq_stack[tp->cpu];
	43	if (addr >= base &&
	44	addr <= (base + THREAD_SIZE - sizeof(*regs)))
	45	goto check_magic;
	46	base = (unsigned long) softirq_stack[tp->cpu];
	47	if (addr >= base &&
	48	addr <= (base + THREAD_SIZE - sizeof(*regs)))
	49	goto check_magic;
	50	}
4f70f7a9 DM	51	return false;
	52
	53	check_magic:
	54	if ((regs->magic & ~0x1ff) == PT_REGS_MAGIC)
	55	return true;
	56	return false;
	57
	58	}
	59
	60	#endif /* _KSTACK_H */