Commit | Line | Data |
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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 */ |