| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20241017002520.59124-7-irogers@google.com>
Date: Wed, 16 Oct 2024 17:25:06 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>, John Garry <john.g.garry@...cle.com>,
Will Deacon <will@...nel.org>, James Clark <james.clark@...aro.org>,
Mike Leach <mike.leach@...aro.org>, Leo Yan <leo.yan@...ux.dev>, Guo Ren <guoren@...nel.org>,
Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>, Nick Terrell <terrelln@...com>,
"Masami Hiramatsu (Google)" <mhiramat@...nel.org>, Changbin Du <changbin.du@...wei.com>,
Guilherme Amadio <amadio@...too.org>, Yang Jihong <yangjihong@...edance.com>,
Aditya Gupta <adityag@...ux.ibm.com>, Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
Masahiro Yamada <masahiroy@...nel.org>, Bibo Mao <maobibo@...ngson.cn>,
Huacai Chen <chenhuacai@...nel.org>, Kajol Jain <kjain@...ux.ibm.com>,
Atish Patra <atishp@...osinc.com>, Shenlin Liang <liangshenlin@...incomputing.com>,
Anup Patel <anup@...infault.org>, Oliver Upton <oliver.upton@...ux.dev>,
"Steinar H. Gunderson" <sesse@...gle.com>, "Dr. David Alan Gilbert" <linux@...blig.org>,
Chen Pei <cp0613@...ux.alibaba.com>, Dima Kogan <dima@...retsauce.net>,
Przemek Kitszel <przemyslaw.kitszel@...el.com>, "David S. Miller" <davem@...emloft.net>,
Alexander Lobakin <aleksander.lobakin@...el.com>, linux-kernel@...r.kernel.org,
linux-perf-users@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-csky@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: [PATCH v3 06/20] perf dwarf-regs: Pass ELF flags to get_dwarf_regstr
Pass a flags value as architectures like csky need the flags to
determine the ABI variant.
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/util/dwarf-regs.c | 3 ++-
tools/perf/util/include/dwarf-regs.h | 11 ++++++-----
tools/perf/util/probe-finder.c | 13 +++++++------
tools/perf/util/probe-finder.h | 3 ++-
4 files changed, 17 insertions(+), 13 deletions(-)
diff --git a/tools/perf/util/dwarf-regs.c b/tools/perf/util/dwarf-regs.c
index 1321387f6948..86b3ef638fbb 100644
--- a/tools/perf/util/dwarf-regs.c
+++ b/tools/perf/util/dwarf-regs.c
@@ -29,7 +29,8 @@
#define __get_dwarf_regstr(tbl, n) (((n) < ARRAY_SIZE(tbl)) ? (tbl)[(n)] : NULL)
/* Return architecture dependent register string (for kprobe-tracer) */
-const char *get_dwarf_regstr(unsigned int n, unsigned int machine)
+const char *get_dwarf_regstr(unsigned int n, unsigned int machine,
+ unsigned int flags __maybe_unused)
{
switch (machine) {
case EM_NONE: /* Generic arch - use host arch */
diff --git a/tools/perf/util/include/dwarf-regs.h b/tools/perf/util/include/dwarf-regs.h
index ee0a734564c7..925525405e2d 100644
--- a/tools/perf/util/include/dwarf-regs.h
+++ b/tools/perf/util/include/dwarf-regs.h
@@ -80,12 +80,13 @@
#ifdef HAVE_LIBDW_SUPPORT
const char *get_arch_regstr(unsigned int n);
-/*
- * get_dwarf_regstr - Returns ftrace register string from DWARF regnum
- * n: DWARF register number
- * machine: ELF machine signature (EM_*)
+/**
+ * get_dwarf_regstr() - Returns ftrace register string from DWARF regnum.
+ * @n: DWARF register number.
+ * @machine: ELF machine signature (EM_*).
+ * @flags: ELF flags for things like ABI differences.
*/
-const char *get_dwarf_regstr(unsigned int n, unsigned int machine);
+const char *get_dwarf_regstr(unsigned int n, unsigned int machine, unsigned int flags);
int get_arch_regnum(const char *name);
/*
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 8ea15a2a4397..8a932cc2f63d 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -56,7 +56,7 @@ static struct probe_trace_arg_ref *alloc_trace_arg_ref(long offs)
*/
static int convert_variable_location(Dwarf_Die *vr_die, Dwarf_Addr addr,
Dwarf_Op *fb_ops, Dwarf_Die *sp_die,
- unsigned int machine,
+ const struct probe_finder *pf,
struct probe_trace_arg *tvar)
{
Dwarf_Attribute attr;
@@ -166,7 +166,7 @@ static int convert_variable_location(Dwarf_Die *vr_die, Dwarf_Addr addr,
if (!tvar)
return ret2;
- regs = get_dwarf_regstr(regn, machine);
+ regs = get_dwarf_regstr(regn, pf->e_machine, pf->e_flags);
if (!regs) {
/* This should be a bug in DWARF or this tool */
pr_warning("Mapping for the register number %u "
@@ -451,7 +451,7 @@ static int convert_variable(Dwarf_Die *vr_die, struct probe_finder *pf)
dwarf_diename(vr_die));
ret = convert_variable_location(vr_die, pf->addr, pf->fb_ops,
- &pf->sp_die, pf->machine, pf->tvar);
+ &pf->sp_die, pf, pf->tvar);
if (ret == -ENOENT && pf->skip_empty_arg)
/* This can be found in other place. skip it */
return 0;
@@ -1134,7 +1134,8 @@ static int debuginfo__find_probes(struct debuginfo *dbg,
if (gelf_getehdr(elf, &ehdr) == NULL)
return -EINVAL;
- pf->machine = ehdr.e_machine;
+ pf->e_machine = ehdr.e_machine;
+ pf->e_flags = ehdr.e_flags;
do {
GElf_Shdr shdr;
@@ -1171,7 +1172,7 @@ static int copy_variables_cb(Dwarf_Die *die_mem, void *data)
(tag == DW_TAG_variable && vf->vars)) {
if (convert_variable_location(die_mem, vf->pf->addr,
vf->pf->fb_ops, &pf->sp_die,
- pf->machine, NULL) == 0) {
+ pf, /*tvar=*/NULL) == 0) {
vf->args[vf->nargs].var = (char *)dwarf_diename(die_mem);
if (vf->args[vf->nargs].var == NULL) {
vf->ret = -ENOMEM;
@@ -1402,7 +1403,7 @@ static int collect_variables_cb(Dwarf_Die *die_mem, void *data)
tag == DW_TAG_variable) {
ret = convert_variable_location(die_mem, af->pf.addr,
af->pf.fb_ops, &af->pf.sp_die,
- af->pf.machine, NULL);
+ &af->pf, /*tvar=*/NULL);
if (ret == 0 || ret == -ERANGE) {
int ret2;
bool externs = !af->child;
diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h
index dfcf8cdd9e8d..be7b46ea2460 100644
--- a/tools/perf/util/probe-finder.h
+++ b/tools/perf/util/probe-finder.h
@@ -68,7 +68,8 @@ struct probe_finder {
/* Call Frame Information from .debug_frame. Not owned. */
Dwarf_CFI *cfi_dbg;
Dwarf_Op *fb_ops; /* Frame base attribute */
- unsigned int machine; /* Target machine arch */
+ unsigned int e_machine; /* ELF target machine arch */
+ unsigned int e_flags; /* ELF target machine flags */
struct perf_probe_arg *pvar; /* Current target variable */
struct probe_trace_arg *tvar; /* Current result variable */
bool skip_empty_arg; /* Skip non-exist args */
--
2.47.0.105.g07ac214952-goog
Powered by blists - more mailing lists