61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
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#ifndef _KSTACK_H
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#define _KSTACK_H
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#include <linux/thread_info.h>
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#include <linux/sched.h>
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#include <asm/ptrace.h>
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#include <asm/irq.h>
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/* SP must be STACK_BIAS adjusted already. */
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static inline bool kstack_valid(struct thread_info *tp, unsigned long sp)
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{
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unsigned long base = (unsigned long) tp;
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if (sp >= (base + sizeof(struct thread_info)) &&
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sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
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return true;
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if (hardirq_stack[tp->cpu]) {
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base = (unsigned long) hardirq_stack[tp->cpu];
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if (sp >= base &&
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sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
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return true;
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base = (unsigned long) softirq_stack[tp->cpu];
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if (sp >= base &&
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sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf)))
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return true;
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}
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return false;
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}
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/* Does "regs" point to a valid pt_regs trap frame? */
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static inline bool kstack_is_trap_frame(struct thread_info *tp, struct pt_regs *regs)
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{
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unsigned long base = (unsigned long) tp;
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unsigned long addr = (unsigned long) regs;
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if (addr >= base &&
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addr <= (base + THREAD_SIZE - sizeof(*regs)))
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goto check_magic;
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if (hardirq_stack[tp->cpu]) {
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base = (unsigned long) hardirq_stack[tp->cpu];
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if (addr >= base &&
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addr <= (base + THREAD_SIZE - sizeof(*regs)))
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goto check_magic;
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base = (unsigned long) softirq_stack[tp->cpu];
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if (addr >= base &&
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addr <= (base + THREAD_SIZE - sizeof(*regs)))
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goto check_magic;
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}
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return false;
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check_magic:
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if ((regs->magic & ~0x1ff) == PT_REGS_MAGIC)
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return true;
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return false;
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}
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#endif /* _KSTACK_H */
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