cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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probe-finder.h (3595B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _PROBE_FINDER_H
      3#define _PROBE_FINDER_H
      4
      5#include <stdbool.h>
      6#include "intlist.h"
      7#include "build-id.h"
      8#include "probe-event.h"
      9#include <linux/ctype.h>
     10
     11#define MAX_PROBE_BUFFER	1024
     12#define MAX_PROBES		 128
     13#define MAX_PROBE_ARGS		 128
     14
     15#define PROBE_ARG_VARS		"$vars"
     16#define PROBE_ARG_PARAMS	"$params"
     17
     18static inline int is_c_varname(const char *name)
     19{
     20	/* TODO */
     21	return isalpha(name[0]) || name[0] == '_';
     22}
     23
     24#ifdef HAVE_DWARF_SUPPORT
     25
     26#include "dwarf-aux.h"
     27
     28/* TODO: export debuginfo data structure even if no dwarf support */
     29
     30/* debug information structure */
     31struct debuginfo {
     32	Dwarf		*dbg;
     33	Dwfl_Module	*mod;
     34	Dwfl		*dwfl;
     35	Dwarf_Addr	bias;
     36	const unsigned char	*build_id;
     37};
     38
     39/* This also tries to open distro debuginfo */
     40struct debuginfo *debuginfo__new(const char *path);
     41void debuginfo__delete(struct debuginfo *dbg);
     42
     43/* Find probe_trace_events specified by perf_probe_event from debuginfo */
     44int debuginfo__find_trace_events(struct debuginfo *dbg,
     45				 struct perf_probe_event *pev,
     46				 struct probe_trace_event **tevs);
     47
     48/* Find a perf_probe_point from debuginfo */
     49int debuginfo__find_probe_point(struct debuginfo *dbg, u64 addr,
     50				struct perf_probe_point *ppt);
     51
     52int debuginfo__get_text_offset(struct debuginfo *dbg, Dwarf_Addr *offs,
     53			       bool adjust_offset);
     54
     55/* Find a line range */
     56int debuginfo__find_line_range(struct debuginfo *dbg, struct line_range *lr);
     57
     58/* Find available variables */
     59int debuginfo__find_available_vars_at(struct debuginfo *dbg,
     60				      struct perf_probe_event *pev,
     61				      struct variable_list **vls);
     62
     63/* Find a src file from a DWARF tag path */
     64int find_source_path(const char *raw_path, const char *sbuild_id,
     65		     const char *comp_dir, char **new_path);
     66
     67struct probe_finder {
     68	struct perf_probe_event	*pev;		/* Target probe event */
     69	struct debuginfo	*dbg;
     70
     71	/* Callback when a probe point is found */
     72	int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf);
     73
     74	/* For function searching */
     75	int			lno;		/* Line number */
     76	Dwarf_Addr		addr;		/* Address */
     77	const char		*fname;		/* Real file name */
     78	Dwarf_Die		cu_die;		/* Current CU */
     79	Dwarf_Die		sp_die;
     80	struct intlist		*lcache;	/* Line cache for lazy match */
     81
     82	/* For variable searching */
     83#if _ELFUTILS_PREREQ(0, 142)
     84	/* Call Frame Information from .eh_frame */
     85	Dwarf_CFI		*cfi_eh;
     86	/* Call Frame Information from .debug_frame */
     87	Dwarf_CFI		*cfi_dbg;
     88#endif
     89	Dwarf_Op		*fb_ops;	/* Frame base attribute */
     90	unsigned int		machine;	/* Target machine arch */
     91	struct perf_probe_arg	*pvar;		/* Current target variable */
     92	struct probe_trace_arg	*tvar;		/* Current result variable */
     93	bool			skip_empty_arg;	/* Skip non-exist args */
     94};
     95
     96struct trace_event_finder {
     97	struct probe_finder	pf;
     98	Dwfl_Module		*mod;		/* For solving symbols */
     99	struct probe_trace_event *tevs;		/* Found trace events */
    100	int			ntevs;		/* Number of trace events */
    101	int			max_tevs;	/* Max number of trace events */
    102};
    103
    104struct available_var_finder {
    105	struct probe_finder	pf;
    106	Dwfl_Module		*mod;		/* For solving symbols */
    107	struct variable_list	*vls;		/* Found variable lists */
    108	int			nvls;		/* Number of variable lists */
    109	int			max_vls;	/* Max no. of variable lists */
    110	bool			child;		/* Search child scopes */
    111};
    112
    113struct line_finder {
    114	struct line_range	*lr;		/* Target line range */
    115
    116	const char		*fname;		/* File name */
    117	int			lno_s;		/* Start line number */
    118	int			lno_e;		/* End line number */
    119	Dwarf_Die		cu_die;		/* Current CU */
    120	Dwarf_Die		sp_die;
    121	int			found;
    122};
    123
    124#endif /* HAVE_DWARF_SUPPORT */
    125
    126#endif /*_PROBE_FINDER_H */