mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 01:05:08 +07:00
94ea09c6a8
The unwind_stack_by_address variant supports unwinding based on any kernel code address. This symbol is also exported so it can be called from modules. Signed-off-by: Daniel Kalmar <kalmard@homejinni.com> Signed-off-by: Gergely Kis <gergely@homejinni.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
53 lines
1.2 KiB
C
53 lines
1.2 KiB
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);
|
|
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 */
|