6f63e781ea
Things like lockdep can try to do stack backtraces before the irqstack blocks have been setup. So don't try to match their ranges so early on. Also, remove unused variable in save_stack_trace(). Signed-off-by: David S. Miller <davem@davemloft.net>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
#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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