diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-08-13 20:48:25 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-08-13 20:48:25 -0700 |
commit | 0ff8285075a1242dbc969b6b4b1719d692931a02 (patch) | |
tree | 75498fec971960aa9a038846cf7d2561a49bce73 /arch/sparc64/kernel/kstack.h | |
parent | 8d0968abd03ec6b407df117adc773562386702fa (diff) | |
parent | 6f63e781eaf6a741fc65f773017154b20ed4ce3b (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
sparc64: Handle stack trace attempts before irqstacks are setup.
sparc64: Implement IRQ stacks.
sparc: remove include of linux/of_device.h from asm/of_device.h
sparc64: Fix recursion in stack overflow detection handling.
sparc/drivers: use linux/of_device.h instead of asm/of_device.h
sparc64: Don't MAGIC_SYSRQ ifdef smp_fetch_global_regs and support code.
Diffstat (limited to 'arch/sparc64/kernel/kstack.h')
-rw-r--r-- | arch/sparc64/kernel/kstack.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/kstack.h b/arch/sparc64/kernel/kstack.h new file mode 100644 index 00000000000..4248d969272 --- /dev/null +++ b/arch/sparc64/kernel/kstack.h @@ -0,0 +1,60 @@ +#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 */ |