| David S. Miller | 4f70f7a | 2008-08-12 18:33:56 -0700 | [diff] [blame^] | 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 | |
| 18 | base = (unsigned long) hardirq_stack[tp->cpu]; |
| 19 | if (sp >= base && |
| 20 | sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf))) |
| 21 | return true; |
| 22 | base = (unsigned long) softirq_stack[tp->cpu]; |
| 23 | if (sp >= base && |
| 24 | sp <= (base + THREAD_SIZE - sizeof(struct sparc_stackf))) |
| 25 | return true; |
| 26 | |
| 27 | return false; |
| 28 | } |
| 29 | |
| 30 | /* Does "regs" point to a valid pt_regs trap frame? */ |
| 31 | static inline bool kstack_is_trap_frame(struct thread_info *tp, struct pt_regs *regs) |
| 32 | { |
| 33 | unsigned long base = (unsigned long) tp; |
| 34 | unsigned long addr = (unsigned long) regs; |
| 35 | |
| 36 | if (addr >= base && |
| 37 | addr <= (base + THREAD_SIZE - sizeof(*regs))) |
| 38 | goto check_magic; |
| 39 | |
| 40 | base = (unsigned long) hardirq_stack[tp->cpu]; |
| 41 | if (addr >= base && |
| 42 | addr <= (base + THREAD_SIZE - sizeof(*regs))) |
| 43 | goto check_magic; |
| 44 | base = (unsigned long) softirq_stack[tp->cpu]; |
| 45 | if (addr >= base && |
| 46 | addr <= (base + THREAD_SIZE - sizeof(*regs))) |
| 47 | goto check_magic; |
| 48 | |
| 49 | return false; |
| 50 | |
| 51 | check_magic: |
| 52 | if ((regs->magic & ~0x1ff) == PT_REGS_MAGIC) |
| 53 | return true; |
| 54 | return false; |
| 55 | |
| 56 | } |
| 57 | |
| 58 | #endif /* _KSTACK_H */ |