45 lines
981 B
C
45 lines
981 B
C
|
#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);
|
||
|
|
#else
|
||
|
|
#define raw_show_trace 1
|
||
|
|
#define unwind_stack(task, sp, pc, ra) 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 */
|