Contributors: 17
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Naveen N. Rao |
287 |
50.98% |
7 |
19.44% |
| Ravi Bangoria |
123 |
21.85% |
3 |
8.33% |
| Masami Hiramatsu |
46 |
8.17% |
8 |
22.22% |
| Adrian Hunter |
32 |
5.68% |
1 |
2.78% |
| Paul A. Clarke |
16 |
2.84% |
1 |
2.78% |
| Ananth N. Mavinakayanahalli |
14 |
2.49% |
1 |
2.78% |
| Anton Blanchard |
14 |
2.49% |
1 |
2.78% |
| Sandipan Das |
5 |
0.89% |
2 |
5.56% |
| Ian Rogers |
4 |
0.71% |
2 |
5.56% |
| Namhyung Kim |
4 |
0.71% |
1 |
2.78% |
| Krister Johansen |
4 |
0.71% |
1 |
2.78% |
| Arnaldo Carvalho de Melo |
4 |
0.71% |
3 |
8.33% |
| Jiri Olsa |
3 |
0.53% |
1 |
2.78% |
| Thomas Gleixner |
2 |
0.36% |
1 |
2.78% |
| Ingo Molnar |
2 |
0.36% |
1 |
2.78% |
| Frédéric Weisbecker |
2 |
0.36% |
1 |
2.78% |
| Srikar Dronamraju |
1 |
0.18% |
1 |
2.78% |
| Total |
563 |
|
36 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
*
* Copyright (C) 2015 Naveen N. Rao, IBM Corporation
*/
#include "dso.h"
#include "symbol.h"
#include "map.h"
#include "probe-event.h"
#include "probe-file.h"
int arch__choose_best_symbol(struct symbol *syma,
struct symbol *symb __maybe_unused)
{
char *sym = syma->name;
#if !defined(_CALL_ELF) || _CALL_ELF != 2
/* Skip over any initial dot */
if (*sym == '.')
sym++;
#endif
/* Avoid "SyS" kernel syscall aliases */
if (strlen(sym) >= 3 && !strncmp(sym, "SyS", 3))
return SYMBOL_B;
if (strlen(sym) >= 10 && !strncmp(sym, "compat_SyS", 10))
return SYMBOL_B;
return SYMBOL_A;
}
#if !defined(_CALL_ELF) || _CALL_ELF != 2
/* Allow matching against dot variants */
int arch__compare_symbol_names(const char *namea, const char *nameb)
{
/* Skip over initial dot */
if (*namea == '.')
namea++;
if (*nameb == '.')
nameb++;
return strcmp(namea, nameb);
}
int arch__compare_symbol_names_n(const char *namea, const char *nameb,
unsigned int n)
{
/* Skip over initial dot */
if (*namea == '.')
namea++;
if (*nameb == '.')
nameb++;
return strncmp(namea, nameb, n);
}
const char *arch__normalize_symbol_name(const char *name)
{
/* Skip over initial dot */
if (name && *name == '.')
name++;
return name;
}
#endif
#if defined(_CALL_ELF) && _CALL_ELF == 2
#ifdef HAVE_LIBELF_SUPPORT
void arch__sym_update(struct symbol *s, GElf_Sym *sym)
{
s->arch_sym = sym->st_other;
}
#endif
#define PPC64LE_LEP_OFFSET 8
void arch__fix_tev_from_maps(struct perf_probe_event *pev,
struct probe_trace_event *tev, struct map *map,
struct symbol *sym)
{
int lep_offset;
/*
* When probing at a function entry point, we normally always want the
* LEP since that catches calls to the function through both the GEP and
* the LEP. Hence, we would like to probe at an offset of 8 bytes if
* the user only specified the function entry.
*
* However, if the user specifies an offset, we fall back to using the
* GEP since all userspace applications (objdump/readelf) show function
* disassembly with offsets from the GEP.
*/
if (pev->point.offset || !map || !sym)
return;
/* For kretprobes, add an offset only if the kernel supports it */
if (!pev->uprobes && pev->point.retprobe) {
#ifdef HAVE_LIBELF_SUPPORT
if (!kretprobe_offset_is_supported())
#endif
return;
}
lep_offset = PPC64_LOCAL_ENTRY_OFFSET(sym->arch_sym);
if (map__dso(map)->symtab_type == DSO_BINARY_TYPE__KALLSYMS)
tev->point.offset += PPC64LE_LEP_OFFSET;
else if (lep_offset) {
if (pev->uprobes)
tev->point.address += lep_offset;
else
tev->point.offset += lep_offset;
}
}
#ifdef HAVE_LIBELF_SUPPORT
void arch__post_process_probe_trace_events(struct perf_probe_event *pev,
int ntevs)
{
struct probe_trace_event *tev;
struct map *map;
struct symbol *sym = NULL;
struct rb_node *tmp;
int i = 0;
map = get_target_map(pev->target, pev->nsi, pev->uprobes);
if (!map || map__load(map) < 0)
return;
for (i = 0; i < ntevs; i++) {
tev = &pev->tevs[i];
map__for_each_symbol(map, sym, tmp) {
if (map__unmap_ip(map, sym->start) == tev->point.address) {
arch__fix_tev_from_maps(pev, tev, map, sym);
break;
}
}
}
}
#endif /* HAVE_LIBELF_SUPPORT */
#endif