FM / runtime

/usr/share/systemtap/runtime

Name	Size	Mode	Actions
dyninst/	-	0755	rm
linux/	-	0755	rm
softfloat/	-	0755	rm
transport/	-	0755	rm
unwind/	-	0755	rm
addr-map.c	523	0644	edit dl rm
addr-map.h	1156	0644	edit dl rm
alloc.c	498	0644	edit dl rm
arith.c	483	0644	edit dl rm
common_probe_context.h	6576	0644	edit dl rm
common_session_state.h	415	0644	edit dl rm
compatdefs.h	3682	0644	edit dl rm
copy.c	585	0644	edit dl rm
debug.h	485	0644	edit dl rm
io.c	508	0644	edit dl rm
k_syms.h	182	0644	edit dl rm
loc2c-runtime.h	17937	0644	edit dl rm
map-gen.c	25977	0644	edit dl rm
map-stat.c	3589	0644	edit dl rm
map.c	14660	0644	edit dl rm
map.h	5918	0644	edit dl rm
mempool.c	2644	0644	edit dl rm
namespaces.h	487	0644	edit dl rm
pmap-gen.c	8710	0644	edit dl rm
print.c	486	0644	edit dl rm
print.h	872	0644	edit dl rm
print_flush.c	3073	0644	edit dl rm
probe_lock.h	498	0644	edit dl rm
procfs-probes.c	4673	0644	edit dl rm
procfs-probes.h	674	0644	edit dl rm
procfs.c	4021	0644	edit dl rm
proc_fs_compatibility.h	2316	0644	edit dl rm
ptrace_compatibility.h	1512	0644	edit dl rm
regs.c	4280	0644	edit dl rm
regs.h	2352	0644	edit dl rm
runtime.h	928	0644	edit dl rm
runtime_context.h	669	0644	edit dl rm
runtime_defines.h	3582	0644	edit dl rm
softfloat.c	77159	0644	edit dl rm
softfloat.h	5125	0644	edit dl rm
stack-arm.c	1688	0644	edit dl rm
stack-ia64.c	1083	0644	edit dl rm
stack-mips.c	125	0644	edit dl rm
stack-s390.c	2362	0644	edit dl rm
stack.c	21790	0644	edit dl rm
stat-common.c	8486	0644	edit dl rm
stat.c	7421	0644	edit dl rm
stat.h	1964	0644	edit dl rm
stp_helper_lock.h	3669	0644	edit dl rm
stp_string.c	8632	0644	edit dl rm
stp_string.h	598	0644	edit dl rm
stp_task_work.c	3511	0644	edit dl rm
stp_utrace.c	94735	0644	edit dl rm
stp_utrace.h	14010	0644	edit dl rm
sym.c	39757	0644	edit dl rm
sym.h	6539	0644	edit dl rm
syscall.h	17408	0644	edit dl rm
task_finder_vma.c	13290	0644	edit dl rm
time.c	14887	0644	edit dl rm
timer.c	481	0644	edit dl rm
timer.h	482	0644	edit dl rm
uidgid_compatibility.h	603	0644	edit dl rm
unwind.c	47890	0644	edit dl rm
utrace_compatibility.h	3148	0644	edit dl rm
vma.c	9545	0644	edit dl rm
vsprintf.c	24058	0644	edit dl rm
vsprintf.h	1502	0644	edit dl rm

Edit: /usr/share/systemtap/runtime/compatdefs.h (3682B)

/* Compatibility definitions for older kernels.
 * Copyright (C) 2010 Red Hat Inc.
 *
 * This file is part of systemtap, and is free software.  You can
 * redistribute it and/or modify it under the terms of the GNU General
 * Public License (GPL); either version 2, or (at your option) any
 * later version.
 */

#ifndef _STP_COMPAT_H_ /* -*- linux-c -*- */
#define _STP_COMPAT_H_

#if defined(CONFIG_COMPAT)
#include <linux/thread_info.h>

/* _stp_is_compat_task - returns true if this is a 32-on-64 bit user task.
   Note that some kernels/architectures define a function called
   is_compat_task(), but that just tests for being inside a 32bit compat
   syscall. We want to test whether the current task is a 32 bit compat
   task itself.*/
static inline int _stp_is_compat_task2(struct task_struct* tsk)
{
/* x86_64 has a different flag name from all other arches and s390... */
#if defined (__x86_64__) && defined(TIF_IA32)
  return test_tsk_thread_flag(tsk, TIF_IA32);
#elif defined (__x86_64__) /* post TIF_IA32 */
  return (tsk->mm && (tsk->mm->context.flags & MM_CONTEXT_UPROBE_IA32));
#elif defined(__s390__) || defined(__s390x__)
  return test_tsk_thread_flag(tsk, TIF_31BIT);  
#elif defined (__mips__) && !defined(TIF_32BIT)
  #ifdef CONFIG_MIPS32_O32
  return test_tsk_thread_flag(tsk, TIF_32BIT_REGS);    
  #elif defined(CONFIG_MIPS32_N32)
  return test_tsk_thread_flag(tsk, TIF_32BIT_ADDR);      
  #endif
#elif defined (__aarch64__) || defined(__powerpc__) || defined (__riscv)
  return test_tsk_thread_flag(tsk, TIF_32BIT);
#else
#error architecture not supported, no TIF_32BIT flag?
#endif
}
#else

static inline int _stp_is_compat_task2(struct task_struct* tsk)
{
  return 0;
}

#endif /* CONFIG_COMPAT */

static inline int _stp_is_compat_task(void)
{
  return _stp_is_compat_task2(current);
}

/* task_pt_regs is used in some core tapset functions, so try to make
 * sure something sensible is defined. task_pt_regs is required for
 * the tracehook interface api so is normally defined already.
 */
#include <asm/processor.h>
#include <asm/ptrace.h>
#include <linux/sched.h>
#if defined(STAPCONF_LINUX_SCHED_HEADERS)
#include <linux/sched/task_stack.h>
#endif

#if !defined(task_pt_regs)
#if defined(__powerpc__)
#define task_pt_regs(tsk)       ((struct pt_regs *)(tsk)->thread.regs)
#endif
#if defined(__x86_64__)
#define task_pt_regs(tsk)	((struct pt_regs *)(tsk)->thread.rsp0 - 1)
#endif
#if defined(__ia64__)
/* pre-commit 6450578f32 */
#define task_pt_regs(tsk)	ia64_task_regs(tsk)
#endif
#endif

/* Always use _stp_current_pt_regs() in tapset/runtime code to make sure
   the returned user pt_regs are sane. */
#define _stp_current_pt_regs()	(current->mm ? task_pt_regs(current) : NULL)

/* Whether all user registers are valid. If not the pt_regs needs,
 * architecture specific, scrubbing before usage (in the unwinder).
 * XXX Currently very simple heuristics, just check arch. Should
 * user task and user pt_regs state.
 *
 * See arch specific "scrubbing" code in runtime/unwind/<arch>.h
 */
static inline int _stp_task_pt_regs_valid(struct task_struct *task,
					  struct pt_regs *uregs)
{
/* It would be nice to just use syscall_get_nr(task, uregs) < 0
 * but that might trigger false negatives or false positives
 * (bad syscall numbers or syscall tracing being in effect).
 */
#if defined(__i386__)
  return 1; /* i386 has so little registers, all are saved. */
#elif defined(__x86_64__)
  return 0;
#endif
  return 0;
}

#ifndef STAPCONF_GET_KRETPROBE
/* prior to linux commit d741bf41d7c7db4898 */
static inline struct kretprobe* get_kretprobe(struct kretprobe_instance *inst)
{
  return inst->rp;
}
#endif

#endif /* _STP_COMPAT_H_ */

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