| 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152 |
- #ifndef _ASM_STACKTRACE_H
- #define _ASM_STACKTRACE_H
- #include <asm/ptrace.h>
- #ifdef CONFIG_KALLSYMS
- extern int raw_show_trace;
- extern unsigned long unwind_stack(struct task_struct *task, unsigned long *sp,
- unsigned long pc, unsigned long *ra);
- extern unsigned long unwind_stack_by_address(unsigned long stack_page,
- unsigned long *sp,
- unsigned long pc,
- unsigned long *ra);
- #else
- #define raw_show_trace 1
- static inline unsigned long unwind_stack(struct task_struct *task,
- unsigned long *sp, unsigned long pc, unsigned long *ra)
- {
- return 0;
- }
- #endif
- static __always_inline void prepare_frametrace(struct pt_regs *regs)
- {
- #ifndef CONFIG_KALLSYMS
- /*
- * Remove any garbage that may be in regs (specially func
- * addresses) to avoid show_raw_backtrace() to report them
- */
- memset(regs, 0, sizeof(*regs));
- #endif
- __asm__ __volatile__(
- ".set push\n\t"
- ".set noat\n\t"
- #ifdef CONFIG_64BIT
- "1: dla $1, 1b\n\t"
- "sd $1, %0\n\t"
- "sd $29, %1\n\t"
- "sd $31, %2\n\t"
- #else
- "1: la $1, 1b\n\t"
- "sw $1, %0\n\t"
- "sw $29, %1\n\t"
- "sw $31, %2\n\t"
- #endif
- ".set pop\n\t"
- : "=m" (regs->cp0_epc),
- "=m" (regs->regs[29]), "=m" (regs->regs[31])
- : : "memory");
- }
- #endif /* _ASM_STACKTRACE_H */
|
