[PATCH v4 7/8] perf unwind-libunwind: Remove libunwind-local

Ian Rogers
2026-04-13T02:48:24Z

Local unwinding only works on the machine libunwind is built for,
rather than cross platform, the APIs for remote and local unwinding
are similar but types like unw_word_t depend on the included
header. Place the architecture specific code into the appropriate
libunwind-<arch>.c file. Put generic code in unwind-libunwind.c and
use libunwind-arch to choose the correct implementation based on the
thread's e_machine. Structuring the code this way avoids including the
unwind-libunwind-local.c for each architecture of remote
unwinding. Data is moved into the struct unwind_info to simplify the
architecture and generic code, trying to keep as much code as possible
generic.

Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/util/Build | 3 -
.../perf/util/libunwind-arch/libunwind-arch.c | 184 ++++
.../perf/util/libunwind-arch/libunwind-arch.h | 234 +++++
.../perf/util/libunwind-arch/libunwind-arm.c | 256 ++++++
.../util/libunwind-arch/libunwind-arm64.c | 255 ++++++
.../perf/util/libunwind-arch/libunwind-i386.c | 254 ++++++
.../util/libunwind-arch/libunwind-loongarch.c | 255 ++++++
.../perf/util/libunwind-arch/libunwind-mips.c | 255 ++++++
.../util/libunwind-arch/libunwind-ppc32.c | 255 ++++++
.../util/libunwind-arch/libunwind-ppc64.c | 255 ++++++
.../perf/util/libunwind-arch/libunwind-s390.c | 255 ++++++
.../util/libunwind-arch/libunwind-x86_64.c | 253 ++++++
tools/perf/util/libunwind/arm64.c | 35 -
tools/perf/util/libunwind/x86_32.c | 29 -
tools/perf/util/maps.c | 10 -
tools/perf/util/maps.h | 2 -
tools/perf/util/unwind-libunwind-local.c | 819 ------------------
tools/perf/util/unwind-libunwind.c | 654 +++++++++++++-
tools/perf/util/unwind.h | 7 -
19 files changed, 3334 insertions(+), 936 deletions(-)
delete mode 100644 tools/perf/util/libunwind/arm64.c
delete mode 100644 tools/perf/util/libunwind/x86_32.c
delete mode 100644 tools/perf/util/unwind-libunwind-local.c

diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index bf4204135ccb..2bb60f50f62d 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -226,11 +226,8 @@ perf-util-$(CONFIG_LIBDW) += annotate-data.o
perf-util-$(CONFIG_LIBDW) += libdw.o
perf-util-$(CONFIG_LIBDW) += unwind-libdw.o

-perf-util-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind-local.o
perf-util-$(CONFIG_LIBUNWIND) += unwind-libunwind.o
perf-util-$(CONFIG_LIBUNWIND) += libunwind-arch/
-perf-util-$(CONFIG_LIBUNWIND_X86) += libunwind/x86_32.o
-perf-util-$(CONFIG_LIBUNWIND_AARCH64) += libunwind/arm64.o

ifeq ($(CONFIG_LIBTRACEEVENT),y)
perf-util-$(CONFIG_LIBBABELTRACE) += data-convert-bt.o
diff --git a/tools/perf/util/libunwind-arch/libunwind-arch.c b/tools/perf/util/libunwind-arch/libunwind-arch.c
index 9692e6c81492..8539b4233df4 100644
--- a/tools/perf/util/libunwind-arch/libunwind-arch.c
+++ b/tools/perf/util/libunwind-arch/libunwind-arch.c
@@ -112,3 +112,187 @@ void libunwind_arch__finish_access(struct maps *maps)
break;
}
}
+
+void *libunwind_arch__create_addr_space(unsigned int e_machine)
+{
+ switch (e_machine) {
+ case EM_ARM:
+ return __libunwind_arch__create_addr_space_arm();
+ case EM_AARCH64:
+ return __libunwind_arch__create_addr_space_arm64();
+ case EM_LOONGARCH:
+ return __libunwind_arch__create_addr_space_loongarch();
+ case EM_MIPS:
+ return __libunwind_arch__create_addr_space_mips();
+ case EM_PPC:
+ return __libunwind_arch__create_addr_space_ppc32();
+ case EM_PPC64:
+ return __libunwind_arch__create_addr_space_ppc64();
+ case EM_S390:
+ return __libunwind_arch__create_addr_space_s390();
+ case EM_386:
+ return __libunwind_arch__create_addr_space_i386();
+ case EM_X86_64:
+ return __libunwind_arch__create_addr_space_x86_64();
+ default:
+ pr_err("ELF MACHINE %x is not supported.\n", e_machine);
+ return NULL;
+ }
+}
+
+int libunwind_arch__dwarf_search_unwind_table(unsigned int e_machine,
+ void *as,
+ uint64_t ip,
+ struct libarch_unwind__dyn_info *di,
+ void *pi,
+ int need_unwind_info,
+ void *arg)
+{
+ switch (e_machine) {
+ case EM_ARM:
+ return __libunwind_arch__dwarf_search_unwind_table_arm(as, ip, di, pi,
+ need_unwind_info, arg);
+ case EM_AARCH64:
+ return __libunwind_arch__dwarf_search_unwind_table_arm64(as, ip, di, pi,
+ need_unwind_info, arg);
+ case EM_LOONGARCH:
+ return __libunwind_arch__dwarf_search_unwind_table_loongarch(as, ip, di, pi,
+ need_unwind_info, arg);
+ case EM_MIPS:
+ return __libunwind_arch__dwarf_search_unwind_table_mips(as, ip, di, pi,
+ need_unwind_info, arg);
+ case EM_PPC:
+ return __libunwind_arch__dwarf_search_unwind_table_ppc32(as, ip, di, pi,
+ need_unwind_info, arg);
+ case EM_PPC64:
+ return __libunwind_arch__dwarf_search_unwind_table_ppc64(as, ip, di, pi,
+ need_unwind_info, arg);
+ case EM_S390:
+ return __libunwind_arch__dwarf_search_unwind_table_s390(as, ip, di, pi,
+ need_unwind_info, arg);
+ case EM_386:
+ return __libunwind_arch__dwarf_search_unwind_table_i386(as, ip, di, pi,
+ need_unwind_info, arg);
+ case EM_X86_64:
+ return __libunwind_arch__dwarf_search_unwind_table_x86_64(as, ip, di, pi,
+ need_unwind_info, arg);
+ default:
+ pr_err("ELF MACHINE %x is not supported.\n", e_machine);
+ return -EINVAL;
+ }
+}
+
+int libunwind_arch__dwarf_find_debug_frame(unsigned int e_machine,
+ int found,
+ struct libarch_unwind__dyn_info *di_debug,
+ uint64_t ip,
+ uint64_t segbase,
+ const char *obj_name,
+ uint64_t start,
+ uint64_t end)
+{
+ switch (e_machine) {
+ case EM_ARM:
+ return __libunwind_arch__dwarf_find_debug_frame_arm(found, di_debug, ip, segbase,
+ obj_name, start, end);
+ case EM_AARCH64:
+ return __libunwind_arch__dwarf_find_debug_frame_arm64(found, di_debug, ip, segbase,
+ obj_name, start, end);
+ case EM_LOONGARCH:
+ return __libunwind_arch__dwarf_find_debug_frame_loongarch(found, di_debug, ip,
+ segbase, obj_name,
+ start, end);
+ case EM_MIPS:
+ return __libunwind_arch__dwarf_find_debug_frame_mips(found, di_debug, ip, segbase,
+ obj_name, start, end);
+ case EM_PPC:
+ return __libunwind_arch__dwarf_find_debug_frame_ppc32(found, di_debug, ip, segbase,
+ obj_name, start, end);
+ case EM_PPC64:
+ return __libunwind_arch__dwarf_find_debug_frame_ppc64(found, di_debug, ip, segbase,
+ obj_name, start, end);
+ case EM_S390:
+ return __libunwind_arch__dwarf_find_debug_frame_s390(found, di_debug, ip, segbase,
+ obj_name, start, end);
+ case EM_386:
+ return __libunwind_arch__dwarf_find_debug_frame_i386(found, di_debug, ip, segbase,
+ obj_name, start, end);
+ case EM_X86_64:
+ return __libunwind_arch__dwarf_find_debug_frame_x86_64(found, di_debug, ip, segbase,
+ obj_name, start, end);
+ default:
+ pr_err("ELF MACHINE %x is not supported.\n", e_machine);
+ return -EINVAL;
+ }
+}
+
+struct unwind_info *libunwind_arch_unwind_info__new(struct thread *thread,
+ struct perf_sample *sample, int max_stack,
+ bool best_effort, uint16_t e_machine,
+ uint64_t first_ip)
+{
+ switch (e_machine) {
+ case EM_ARM:
+ return __libunwind_arch_unwind_info__new_arm(thread, sample, max_stack,
+ best_effort, first_ip);
+ case EM_AARCH64:
+ return __libunwind_arch_unwind_info__new_arm64(thread, sample, max_stack,
+ best_effort, first_ip);
+ case EM_LOONGARCH:
+ return __libunwind_arch_unwind_info__new_loongarch(thread, sample, max_stack,
+ best_effort, first_ip);
+ case EM_MIPS:
+ return __libunwind_arch_unwind_info__new_mips(thread, sample, max_stack,
+ best_effort, first_ip);
+ case EM_PPC:
+ return __libunwind_arch_unwind_info__new_ppc32(thread, sample, max_stack,
+ best_effort, first_ip);
+ case EM_PPC64:
+ return __libunwind_arch_unwind_info__new_ppc64(thread, sample, max_stack,
+ best_effort, first_ip);
+ case EM_S390:
+ return __libunwind_arch_unwind_info__new_s390(thread, sample, max_stack,
+ best_effort, first_ip);
+ case EM_386:
+ return __libunwind_arch_unwind_info__new_i386(thread, sample, max_stack,
+ best_effort, first_ip);
+ case EM_X86_64:
+ return __libunwind_arch_unwind_info__new_x86_64(thread, sample, max_stack,
+ best_effort, first_ip);
+ default:
+ pr_err("ELF MACHINE %x is not supported.\n", e_machine);
+ return NULL;
+ }
+}
+
+void libunwind_arch_unwind_info__delete(struct unwind_info *ui)
+{
+ free(ui);
+}
+
+int libunwind_arch__unwind_step(struct unwind_info *ui)
+{
+ switch (ui->e_machine) {
+ case EM_ARM:
+ return __libunwind_arch__unwind_step_arm(ui);
+ case EM_AARCH64:
+ return __libunwind_arch__unwind_step_arm64(ui);
+ case EM_LOONGARCH:
+ return __libunwind_arch__unwind_step_loongarch(ui);
+ case EM_MIPS:
+ return __libunwind_arch__unwind_step_mips(ui);
+ case EM_PPC:
+ return __libunwind_arch__unwind_step_ppc32(ui);
+ case EM_PPC64:
+ return __libunwind_arch__unwind_step_ppc64(ui);
+ case EM_S390:
+ return __libunwind_arch__unwind_step_s390(ui);
+ case EM_386:
+ return __libunwind_arch__unwind_step_i386(ui);
+ case EM_X86_64:
+ return __libunwind_arch__unwind_step_x86_64(ui);
+ default:
+ pr_err("ELF MACHINE %x is not supported.\n", ui->e_machine);
+ return -EINVAL;
+ }
+}
diff --git a/tools/perf/util/libunwind-arch/libunwind-arch.h b/tools/perf/util/libunwind-arch/libunwind-arch.h
index c00277a5e914..2bf7fc33313b 100644
--- a/tools/perf/util/libunwind-arch/libunwind-arch.h
+++ b/tools/perf/util/libunwind-arch/libunwind-arch.h
@@ -2,7 +2,36 @@
#ifndef __LIBUNWIND_ARCH_H
#define __LIBUNWIND_ARCH_H

+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+struct machine;
struct maps;
+struct perf_sample;
+struct thread;
+
+struct unwind_info {
+ struct machine *machine;
+ struct thread *thread;
+ struct perf_sample *sample;
+ void *cursor;
+ uint64_t *ips;
+ int cur_ip;
+ int max_ips;
+ unsigned int unw_word_t_size;
+ uint16_t e_machine;
+ bool best_effort;
+};
+
+struct libarch_unwind__dyn_info {
+ uint64_t start_ip;
+ uint64_t end_ip;
+ uint64_t segbase;
+ uint64_t table_data;
+ uint64_t table_len;
+};
+struct libarch_unwind__proc_info;

int __get_perf_regnum_for_unw_regnum_arm(int unw_regnum);
int __get_perf_regnum_for_unw_regnum_arm64(int unw_regnum);
@@ -37,4 +66,209 @@ void __libunwind_arch__finish_access_i386(struct maps *maps);
void __libunwind_arch__finish_access_x86_64(struct maps *maps);
void libunwind_arch__finish_access(struct maps *maps);

+void *__libunwind_arch__create_addr_space_arm(void);
+void *__libunwind_arch__create_addr_space_arm64(void);
+void *__libunwind_arch__create_addr_space_loongarch(void);
+void *__libunwind_arch__create_addr_space_mips(void);
+void *__libunwind_arch__create_addr_space_ppc32(void);
+void *__libunwind_arch__create_addr_space_ppc64(void);
+void *__libunwind_arch__create_addr_space_s390(void);
+void *__libunwind_arch__create_addr_space_i386(void);
+void *__libunwind_arch__create_addr_space_x86_64(void);
+void *libunwind_arch__create_addr_space(unsigned int e_machine);
+
+int __libunwind__find_proc_info(void *as, uint64_t ip, void *pi, int need_unwind_info, void *arg);
+int __libunwind__access_mem(void *as, uint64_t addr, void *valp_word, int __write, void *arg);
+int __libunwind__access_reg(void *as, int regnum, void *valp_word, int __write, void *arg);
+
+int __libunwind_arch__dwarf_search_unwind_table_arm(void *as, uint64_t ip,
+ struct libarch_unwind__dyn_info *di,
+ void *pi,
+ int need_unwind_info,
+ void *arg);
+int __libunwind_arch__dwarf_search_unwind_table_arm64(void *as, uint64_t ip,
+ struct libarch_unwind__dyn_info *di,
+ void *pi,
+ int need_unwind_info,
+ void *arg);
+int __libunwind_arch__dwarf_search_unwind_table_loongarch(void *as, uint64_t ip,
+ struct libarch_unwind__dyn_info *di,
+ void *pi,
+ int need_unwind_info,
+ void *arg);
+int __libunwind_arch__dwarf_search_unwind_table_mips(void *as, uint64_t ip,
+ struct libarch_unwind__dyn_info *di,
+ void *pi,
+ int need_unwind_info,
+ void *arg);
+int __libunwind_arch__dwarf_search_unwind_table_ppc32(void *as, uint64_t ip,
+ struct libarch_unwind__dyn_info *di,
+ void *pi,
+ int need_unwind_info,
+ void *arg);
+int __libunwind_arch__dwarf_search_unwind_table_ppc64(void *as, uint64_t ip,
+ struct libarch_unwind__dyn_info *di,
+ void *pi,
+ int need_unwind_info,
+ void *arg);
+int __libunwind_arch__dwarf_search_unwind_table_s390(void *as, uint64_t ip,
+ struct libarch_unwind__dyn_info *di,
+ void *pi,
+ int need_unwind_info,
+ void *arg);
+int __libunwind_arch__dwarf_search_unwind_table_i386(void *as, uint64_t ip,
+ struct libarch_unwind__dyn_info *di,
+ void *pi,
+ int need_unwind_info,
+ void *arg);
+int __libunwind_arch__dwarf_search_unwind_table_x86_64(void *as, uint64_t ip,
+ struct libarch_unwind__dyn_info *di,
+ void *pi,
+ int need_unwind_info,
+ void *arg);
+int libunwind_arch__dwarf_search_unwind_table(unsigned int e_machine,
+ void *as,
+ uint64_t ip,
+ struct libarch_unwind__dyn_info *di,
+ void *pi,
+ int need_unwind_info,
+ void *arg);
+
+int __libunwind_arch__dwarf_find_debug_frame_arm(int found,
+ struct libarch_unwind__dyn_info *di_debug,
+ uint64_t ip,
+ uint64_t segbase,
+ const char *obj_name,
+ uint64_t start,
+ uint64_t end);
+int __libunwind_arch__dwarf_find_debug_frame_arm64(int found,
+ struct libarch_unwind__dyn_info *di_debug,
+ uint64_t ip,
+ uint64_t segbase,
+ const char *obj_name,
+ uint64_t start,
+ uint64_t end);
+int __libunwind_arch__dwarf_find_debug_frame_loongarch(int found,
+ struct libarch_unwind__dyn_info *di_debug,
+ uint64_t ip,
+ uint64_t segbase,
+ const char *obj_name,
+ uint64_t start,
+ uint64_t end);
+int __libunwind_arch__dwarf_find_debug_frame_mips(int found,
+ struct libarch_unwind__dyn_info *di_debug,
+ uint64_t ip,
+ uint64_t segbase,
+ const char *obj_name,
+ uint64_t start,
+ uint64_t end);
+int __libunwind_arch__dwarf_find_debug_frame_ppc32(int found,
+ struct libarch_unwind__dyn_info *di_debug,
+ uint64_t ip,
+ uint64_t segbase,
+ const char *obj_name,
+ uint64_t start,
+ uint64_t end);
+int __libunwind_arch__dwarf_find_debug_frame_ppc64(int found,
+ struct libarch_unwind__dyn_info *di_debug,
+ uint64_t ip,
+ uint64_t segbase,
+ const char *obj_name,
+ uint64_t start,
+ uint64_t end);
+int __libunwind_arch__dwarf_find_debug_frame_s390(int found,
+ struct libarch_unwind__dyn_info *di_debug,
+ uint64_t ip,
+ uint64_t segbase,
+ const char *obj_name,
+ uint64_t start,
+ uint64_t end);
+int __libunwind_arch__dwarf_find_debug_frame_i386(int found,
+ struct libarch_unwind__dyn_info *di_debug,
+ uint64_t ip,
+ uint64_t segbase,
+ const char *obj_name,
+ uint64_t start,
+ uint64_t end);
+int __libunwind_arch__dwarf_find_debug_frame_x86_64(int found,
+ struct libarch_unwind__dyn_info *di_debug,
+ uint64_t ip,
+ uint64_t segbase,
+ const char *obj_name,
+ uint64_t start,
+ uint64_t end);
+int libunwind_arch__dwarf_find_debug_frame(unsigned int e_machine,
+ int found,
+ struct libarch_unwind__dyn_info *di_debug,
+ uint64_t ip,
+ uint64_t segbase,
+ const char *obj_name,
+ uint64_t start,
+ uint64_t end);
+
+struct unwind_info *__libunwind_arch_unwind_info__new_arm(struct thread *thread,
+ struct perf_sample *sample,
+ int max_stack,
+ bool best_effort,
+ uint64_t first_ip);
+struct unwind_info *__libunwind_arch_unwind_info__new_arm64(struct thread *thread,
+ struct perf_sample *sample,
+ int max_stack,
+ bool best_effort,
+ uint64_t first_ip);
+struct unwind_info *__libunwind_arch_unwind_info__new_loongarch(struct thread *thread,
+ struct perf_sample *sample,
+ int max_stack,
+ bool best_effort,
+ uint64_t first_ip);
+struct unwind_info *__libunwind_arch_unwind_info__new_mips(struct thread *thread,
+ struct perf_sample *sample,
+ int max_stack,
+ bool best_effort,
+ uint64_t first_ip);
+struct unwind_info *__libunwind_arch_unwind_info__new_ppc32(struct thread *thread,
+ struct perf_sample *sample,
+ int max_stack,
+ bool best_effort,
+ uint64_t first_ip);
+struct unwind_info *__libunwind_arch_unwind_info__new_ppc64(struct thread *thread,
+ struct perf_sample *sample,
+ int max_stack,
+ bool best_effort,
+ uint64_t first_ip);
+struct unwind_info *__libunwind_arch_unwind_info__new_s390(struct thread *thread,
+ struct perf_sample *sample,
+ int max_stack,
+ bool best_effort,
+ uint64_t first_ip);
+struct unwind_info *__libunwind_arch_unwind_info__new_i386(struct thread *thread,
+ struct perf_sample *sample,
+ int max_stack,
+ bool best_effort,
+ uint64_t first_ip);
+struct unwind_info *__libunwind_arch_unwind_info__new_x86_64(struct thread *thread,
+ struct perf_sample *sample,
+ int max_stack,
+ bool best_effort,
+ uint64_t first_ip);
+struct unwind_info *libunwind_arch_unwind_info__new(struct thread *thread,
+ struct perf_sample *sample,
+ int max_stack,
+ bool best_effort,
+ uint16_t e_machine,
+ uint64_t first_ip);
+
+void libunwind_arch_unwind_info__delete(struct unwind_info *ui);
+
+int __libunwind_arch__unwind_step_arm(struct unwind_info *ui);
+int __libunwind_arch__unwind_step_arm64(struct unwind_info *ui);
+int __libunwind_arch__unwind_step_loongarch(struct unwind_info *ui);
+int __libunwind_arch__unwind_step_mips(struct unwind_info *ui);
+int __libunwind_arch__unwind_step_ppc32(struct unwind_info *ui);
+int __libunwind_arch__unwind_step_ppc64(struct unwind_info *ui);
+int __libunwind_arch__unwind_step_s390(struct unwind_info *ui);
+int __libunwind_arch__unwind_step_i386(struct unwind_info *ui);
+int __libunwind_arch__unwind_step_x86_64(struct unwind_info *ui);
+int libunwind_arch__unwind_step(struct unwind_info *ui);
+
#endif /* __LIBUNWIND_ARCH_H */
diff --git a/tools/perf/util/libunwind-arch/libunwind-arm.c b/tools/perf/util/libunwind-arch/libunwind-arm.c
index bbaf01406c52..b31aeeab1663 100644
--- a/tools/perf/util/libunwind-arch/libunwind-arm.c
+++ b/tools/perf/util/libunwind-arch/libunwind-arm.c
@@ -2,8 +2,12 @@
#include "libunwind-arch.h"
#include "../debug.h"
#include "../maps.h"
+#include "../thread.h"
#include "../../../arch/arm/include/uapi/asm/perf_regs.h"
#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <linux/zalloc.h>
+#include <elf.h>
#include <errno.h>

#ifdef HAVE_LIBUNWIND_ARM_SUPPORT
@@ -32,3 +36,255 @@ void __libunwind_arch__finish_access_arm(struct maps *maps __maybe_unused)
unw_destroy_addr_space(maps__addr_space(maps));
#endif
}
+
+
+#ifdef HAVE_LIBUNWIND_ARM_SUPPORT
+static int find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+ int need_unwind_info, void *arg)
+{
+ return __libunwind__find_proc_info(as, ip, pi, need_unwind_info, arg, sizeof(unw_word_t));
+}
+
+static void put_unwind_info(unw_addr_space_t __maybe_unused as,
+ unw_proc_info_t *pi __maybe_unused,
+ void *arg __maybe_unused)
+{
+ pr_debug("unwind: put_unwind_info called\n");
+}
+
+static int get_dyn_info_list_addr(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused *dil_addr,
+ void __maybe_unused *arg)
+{
+ return -UNW_ENOINFO;
+}
+
+static int access_mem(unw_addr_space_t as, unw_word_t addr, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_mem(as, addr, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_reg(unw_addr_space_t as, unw_regnum_t regnum, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_reg(as, regnum, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_fpreg(unw_addr_space_t __maybe_unused as,
+ unw_regnum_t __maybe_unused num,
+ unw_fpreg_t __maybe_unused *val,
+ int __maybe_unused __write,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: access_fpreg unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int resume(unw_addr_space_t __maybe_unused as,
+ unw_cursor_t __maybe_unused *cu,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: resume unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int get_proc_name(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused addr,
+ char __maybe_unused *bufp, size_t __maybe_unused buf_len,
+ unw_word_t __maybe_unused *offp, void __maybe_unused *arg)
+{
+ pr_err("unwind: get_proc_name unsupported\n");
+ return -UNW_EINVAL;
+}
+#endif
+
+void *__libunwind_arch__create_addr_space_arm(void)
+{
+#ifdef HAVE_LIBUNWIND_ARM_SUPPORT
+ static unw_accessors_t accessors = {
+ .find_proc_info = find_proc_info,
+ .put_unwind_info = put_unwind_info,
+ .get_dyn_info_list_addr = get_dyn_info_list_addr,
+ .access_mem = access_mem,
+ .access_reg = access_reg,
+ .access_fpreg = access_fpreg,
+ .resume = resume,
+ .get_proc_name = get_proc_name,
+ };
+ unw_addr_space_t addr_space;
+
+ addr_space = unw_create_addr_space(&accessors, /*byte_order=*/0);
+ unw_set_caching_policy(addr_space, UNW_CACHE_GLOBAL);
+ return addr_space;
+#else
+ return NULL;
+#endif
+}
+
+#ifdef HAVE_LIBUNWIND_ARM_SUPPORT
+extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
+ unw_word_t ip,
+ unw_dyn_info_t *di,
+ unw_proc_info_t *pi,
+ int need_unwind_info, void *arg);
+#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
+#endif
+
+int __libunwind_arch__dwarf_search_unwind_table_arm(void *as __maybe_unused,
+ uint64_t ip __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ void *pi __maybe_unused,
+ int need_unwind_info __maybe_unused,
+ void *arg __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_ARM_SUPPORT
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_search_unwind_table(as, ip, &di, pi, need_unwind_info, arg);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+#if defined(HAVE_LIBUNWIND_ARM_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_ARM)
+extern int UNW_OBJ(dwarf_find_debug_frame) (int found, unw_dyn_info_t *di_debug,
+ unw_word_t ip,
+ unw_word_t segbase,
+ const char *obj_name, unw_word_t start,
+ unw_word_t end);
+#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)
+#endif
+
+int __libunwind_arch__dwarf_find_debug_frame_arm(int found __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ uint64_t ip __maybe_unused,
+ uint64_t segbase __maybe_unused,
+ const char *obj_name __maybe_unused,
+ uint64_t start __maybe_unused,
+ uint64_t end __maybe_unused)
+{
+#if defined(HAVE_LIBUNWIND_ARM_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_ARM)
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_find_debug_frame(found, &di, ip, segbase, obj_name, start, end);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+struct unwind_info *__libunwind_arch_unwind_info__new_arm(struct thread *thread __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ int max_stack __maybe_unused,
+ bool best_effort __maybe_unused,
+ uint64_t first_ip __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_ARM_SUPPORT
+ struct arch_unwind_info {
+ struct unwind_info ui;
+ unw_cursor_t _cursor;
+ uint64_t _ips[];
+ };
+
+ struct maps *maps = thread__maps(thread);
+ void *addr_space = maps__addr_space(maps);
+ struct arch_unwind_info *ui;
+ int ret;
+
+ if (addr_space == NULL)
+ return NULL;
+
+ ui = zalloc(sizeof(*ui) + sizeof(ui->_ips[0]) * max_stack);
+ if (!ui)
+ return NULL;
+
+ ui->ui.machine = maps__machine(maps);
+ ui->ui.thread = thread;
+ ui->ui.sample = sample;
+ ui->ui.cursor = &ui->_cursor;
+ ui->ui.ips = &ui->_ips[0];
+ ui->ui.ips[0] = first_ip;
+ ui->ui.cur_ip = 1;
+ ui->ui.max_ips = max_stack;
+ ui->ui.unw_word_t_size = sizeof(unw_word_t);
+ ui->ui.e_machine = EM_ARM;
+ ui->ui.best_effort = best_effort;
+
+ ret = unw_init_remote(&ui->_cursor, addr_space, &ui->ui);
+ if (ret) {
+ if (!best_effort)
+ pr_err("libunwind: %s\n", unw_strerror(ret));
+ free(ui);
+ return NULL;
+ }
+
+ return &ui->ui;
+#else
+ return NULL;
+#endif
+}
+
+int __libunwind_arch__unwind_step_arm(struct unwind_info *ui __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_ARM_SUPPORT
+ int ret;
+
+ if (ui->cur_ip >= ui->max_ips)
+ return -1;
+
+ ret = unw_step(ui->cursor);
+ if (ret > 0) {
+ uint64_t ip;
+
+ unw_get_reg(ui->cursor, UNW_REG_IP, &ip);
+
+ if (unw_is_signal_frame(ui->cursor) <= 0) {
+ /*
+ * Decrement the IP for any non-activation frames. This
+ * is required to properly find the srcline for caller
+ * frames. See also the documentation for
+ * dwfl_frame_pc(), which this code tries to replicate.
+ */
+ --ip;
+ }
+ ui->ips[ui->cur_ip++] = ip;
+ }
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
diff --git a/tools/perf/util/libunwind-arch/libunwind-arm64.c b/tools/perf/util/libunwind-arch/libunwind-arm64.c
index 8ba510089736..ceeae2d0f8e9 100644
--- a/tools/perf/util/libunwind-arch/libunwind-arm64.c
+++ b/tools/perf/util/libunwind-arch/libunwind-arm64.c
@@ -2,8 +2,12 @@
#include "libunwind-arch.h"
#include "../debug.h"
#include "../maps.h"
+#include "../thread.h"
#include "../../../arch/arm64/include/uapi/asm/perf_regs.h"
#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <linux/zalloc.h>
+#include <elf.h>
#include <errno.h>

#ifdef HAVE_LIBUNWIND_AARCH64_SUPPORT
@@ -32,3 +36,254 @@ void __libunwind_arch__finish_access_arm64(struct maps *maps __maybe_unused)
unw_destroy_addr_space(maps__addr_space(maps));
#endif
}
+
+#ifdef HAVE_LIBUNWIND_AARCH64_SUPPORT
+static int find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+ int need_unwind_info, void *arg)
+{
+ return __libunwind__find_proc_info(as, ip, pi, need_unwind_info, arg, sizeof(unw_word_t));
+}
+
+static void put_unwind_info(unw_addr_space_t __maybe_unused as,
+ unw_proc_info_t *pi __maybe_unused,
+ void *arg __maybe_unused)
+{
+ pr_debug("unwind: put_unwind_info called\n");
+}
+
+static int get_dyn_info_list_addr(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused *dil_addr,
+ void __maybe_unused *arg)
+{
+ return -UNW_ENOINFO;
+}
+
+static int access_mem(unw_addr_space_t as, unw_word_t addr, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_mem(as, addr, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_reg(unw_addr_space_t as, unw_regnum_t regnum, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_reg(as, regnum, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_fpreg(unw_addr_space_t __maybe_unused as,
+ unw_regnum_t __maybe_unused num,
+ unw_fpreg_t __maybe_unused *val,
+ int __maybe_unused __write,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: access_fpreg unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int resume(unw_addr_space_t __maybe_unused as,
+ unw_cursor_t __maybe_unused *cu,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: resume unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int get_proc_name(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused addr,
+ char __maybe_unused *bufp, size_t __maybe_unused buf_len,
+ unw_word_t __maybe_unused *offp, void __maybe_unused *arg)
+{
+ pr_err("unwind: get_proc_name unsupported\n");
+ return -UNW_EINVAL;
+}
+#endif
+
+void *__libunwind_arch__create_addr_space_arm64(void)
+{
+#ifdef HAVE_LIBUNWIND_AARCH64_SUPPORT
+ static unw_accessors_t accessors = {
+ .find_proc_info = find_proc_info,
+ .put_unwind_info = put_unwind_info,
+ .get_dyn_info_list_addr = get_dyn_info_list_addr,
+ .access_mem = access_mem,
+ .access_reg = access_reg,
+ .access_fpreg = access_fpreg,
+ .resume = resume,
+ .get_proc_name = get_proc_name,
+ };
+ unw_addr_space_t addr_space;
+
+ addr_space = unw_create_addr_space(&accessors, /*byte_order=*/0);
+ unw_set_caching_policy(addr_space, UNW_CACHE_GLOBAL);
+ return addr_space;
+#else
+ return NULL;
+#endif
+}
+
+#ifdef HAVE_LIBUNWIND_ARM64_SUPPORT
+extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
+ unw_word_t ip,
+ unw_dyn_info_t *di,
+ unw_proc_info_t *pi,
+ int need_unwind_info, void *arg);
+#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
+#endif
+
+int __libunwind_arch__dwarf_search_unwind_table_arm64(void *as __maybe_unused,
+ uint64_t ip __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ void *pi __maybe_unused,
+ int need_unwind_info __maybe_unused,
+ void *arg __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_ARM64_SUPPORT
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_search_unwind_table(as, ip, &di, pi, need_unwind_info, arg);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+#if defined(HAVE_LIBUNWIND_ARM64_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_ARM64)
+extern int UNW_OBJ(dwarf_find_debug_frame) (int found, unw_dyn_info_t *di_debug,
+ unw_word_t ip,
+ unw_word_t segbase,
+ const char *obj_name, unw_word_t start,
+ unw_word_t end);
+#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)
+#endif
+
+int __libunwind_arch__dwarf_find_debug_frame_arm64(int found __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ uint64_t ip __maybe_unused,
+ uint64_t segbase __maybe_unused,
+ const char *obj_name __maybe_unused,
+ uint64_t start __maybe_unused,
+ uint64_t end __maybe_unused)
+{
+#if defined(HAVE_LIBUNWIND_ARM64_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_ARM64)
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_find_debug_frame(found, &di, ip, segbase, obj_name, start, end);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+struct unwind_info *__libunwind_arch_unwind_info__new_arm64(struct thread *thread __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ int max_stack __maybe_unused,
+ bool best_effort __maybe_unused,
+ uint64_t first_ip __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_ARM64_SUPPORT
+ struct arch_unwind_info {
+ struct unwind_info ui;
+ unw_cursor_t _cursor;
+ uint64_t _ips[];
+ };
+
+ struct maps *maps = thread__maps(thread);
+ void *addr_space = maps__addr_space(maps);
+ struct arch_unwind_info *ui;
+ int ret;
+
+ if (addr_space == NULL)
+ return NULL;
+
+ ui = zalloc(sizeof(*ui) + sizeof(ui->_ips[0]) * max_stack);
+ if (!ui)
+ return NULL;
+
+ ui->ui.machine = maps__machine(maps);
+ ui->ui.thread = thread;
+ ui->ui.sample = sample;
+ ui->ui.cursor = &ui->_cursor;
+ ui->ui.ips = &ui->_ips[0];
+ ui->ui.ips[0] = first_ip;
+ ui->ui.cur_ip = 1;
+ ui->ui.max_ips = max_stack;
+ ui->ui.unw_word_t_size = sizeof(unw_word_t);
+ ui->ui.e_machine = EM_AARCH64;
+ ui->ui.best_effort = best_effort;
+
+ ret = unw_init_remote(&ui->_cursor, addr_space, &ui->ui);
+ if (ret) {
+ if (!best_effort)
+ pr_err("libunwind: %s\n", unw_strerror(ret));
+ free(ui);
+ return NULL;
+ }
+
+ return &ui->ui;
+#else
+ return NULL;
+#endif
+}
+
+int __libunwind_arch__unwind_step_arm64(struct unwind_info *ui __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_ARM64_SUPPORT
+ int ret;
+
+ if (ui->cur_ip >= ui->max_ips)
+ return -1;
+
+ ret = unw_step(ui->cursor);
+ if (ret > 0) {
+ uint64_t ip;
+
+ unw_get_reg(ui->cursor, UNW_REG_IP, &ip);
+
+ if (unw_is_signal_frame(ui->cursor) <= 0) {
+ /*
+ * Decrement the IP for any non-activation frames. This
+ * is required to properly find the srcline for caller
+ * frames. See also the documentation for
+ * dwfl_frame_pc(), which this code tries to replicate.
+ */
+ --ip;
+ }
+ ui->ips[ui->cur_ip++] = ip;
+ }
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
diff --git a/tools/perf/util/libunwind-arch/libunwind-i386.c b/tools/perf/util/libunwind-arch/libunwind-i386.c
index 45ff30c95c1b..fde40872a610 100644
--- a/tools/perf/util/libunwind-arch/libunwind-i386.c
+++ b/tools/perf/util/libunwind-arch/libunwind-i386.c
@@ -2,9 +2,12 @@
#include "libunwind-arch.h"
#include "../debug.h"
#include "../maps.h"
+#include "../thread.h"
#include "../../../arch/x86/include/uapi/asm/perf_regs.h"
#include <linux/compiler.h>
#include <linux/kernel.h>
+#include <linux/zalloc.h>
+#include <elf.h>
#include <errno.h>

#ifdef HAVE_LIBUNWIND_X86_SUPPORT
@@ -56,3 +59,254 @@ void __libunwind_arch__finish_access_i386(struct maps *maps __maybe_unused)
unw_destroy_addr_space(maps__addr_space(maps));
#endif
}
+
+#ifdef HAVE_LIBUNWIND_X86_SUPPORT
+static int find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+ int need_unwind_info, void *arg)
+{
+ return __libunwind__find_proc_info(as, ip, pi, need_unwind_info, arg, sizeof(unw_word_t));
+}
+
+static void put_unwind_info(unw_addr_space_t __maybe_unused as,
+ unw_proc_info_t *pi __maybe_unused,
+ void *arg __maybe_unused)
+{
+ pr_debug("unwind: put_unwind_info called\n");
+}
+
+static int get_dyn_info_list_addr(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused *dil_addr,
+ void __maybe_unused *arg)
+{
+ return -UNW_ENOINFO;
+}
+
+static int access_mem(unw_addr_space_t as, unw_word_t addr, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_mem(as, addr, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_reg(unw_addr_space_t as, unw_regnum_t regnum, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_reg(as, regnum, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_fpreg(unw_addr_space_t __maybe_unused as,
+ unw_regnum_t __maybe_unused num,
+ unw_fpreg_t __maybe_unused *val,
+ int __maybe_unused __write,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: access_fpreg unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int resume(unw_addr_space_t __maybe_unused as,
+ unw_cursor_t __maybe_unused *cu,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: resume unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int get_proc_name(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused addr,
+ char __maybe_unused *bufp, size_t __maybe_unused buf_len,
+ unw_word_t __maybe_unused *offp, void __maybe_unused *arg)
+{
+ pr_err("unwind: get_proc_name unsupported\n");
+ return -UNW_EINVAL;
+}
+#endif
+
+void *__libunwind_arch__create_addr_space_i386(void)
+{
+#ifdef HAVE_LIBUNWIND_X86_SUPPORT
+ static unw_accessors_t accessors = {
+ .find_proc_info = find_proc_info,
+ .put_unwind_info = put_unwind_info,
+ .get_dyn_info_list_addr = get_dyn_info_list_addr,
+ .access_mem = access_mem,
+ .access_reg = access_reg,
+ .access_fpreg = access_fpreg,
+ .resume = resume,
+ .get_proc_name = get_proc_name,
+ };
+ unw_addr_space_t addr_space;
+
+ addr_space = unw_create_addr_space(&accessors, /*byte_order=*/0);
+ unw_set_caching_policy(addr_space, UNW_CACHE_GLOBAL);
+ return addr_space;
+#else
+ return NULL;
+#endif
+}
+
+#ifdef HAVE_LIBUNWIND_X86_SUPPORT
+extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
+ unw_word_t ip,
+ unw_dyn_info_t *di,
+ unw_proc_info_t *pi,
+ int need_unwind_info, void *arg);
+#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
+#endif
+
+int __libunwind_arch__dwarf_search_unwind_table_i386(void *as __maybe_unused,
+ uint64_t ip __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ void *pi __maybe_unused,
+ int need_unwind_info __maybe_unused,
+ void *arg __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_X86_SUPPORT
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_search_unwind_table(as, ip, &di, pi, need_unwind_info, arg);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+#if defined(HAVE_LIBUNWIND_X86_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_X86)
+extern int UNW_OBJ(dwarf_find_debug_frame) (int found, unw_dyn_info_t *di_debug,
+ unw_word_t ip,
+ unw_word_t segbase,
+ const char *obj_name, unw_word_t start,
+ unw_word_t end);
+#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)
+#endif
+
+int __libunwind_arch__dwarf_find_debug_frame_i386(int found __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ uint64_t ip __maybe_unused,
+ uint64_t segbase __maybe_unused,
+ const char *obj_name __maybe_unused,
+ uint64_t start __maybe_unused,
+ uint64_t end __maybe_unused)
+{
+#if defined(HAVE_LIBUNWIND_X86_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_X86)
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_find_debug_frame(found, &di, ip, segbase, obj_name, start, end);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+struct unwind_info *__libunwind_arch_unwind_info__new_i386(struct thread *thread __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ int max_stack __maybe_unused,
+ bool best_effort __maybe_unused,
+ uint64_t first_ip __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_X86_SUPPORT
+ struct arch_unwind_info {
+ struct unwind_info ui;
+ unw_cursor_t _cursor;
+ uint64_t _ips[];
+ };
+
+ struct maps *maps = thread__maps(thread);
+ void *addr_space = maps__addr_space(maps);
+ struct arch_unwind_info *ui;
+ int ret;
+
+ if (addr_space == NULL)
+ return NULL;
+
+ ui = zalloc(sizeof(*ui) + sizeof(ui->_ips[0]) * max_stack);
+ if (!ui)
+ return NULL;
+
+ ui->ui.machine = maps__machine(maps);
+ ui->ui.thread = thread;
+ ui->ui.sample = sample;
+ ui->ui.cursor = &ui->_cursor;
+ ui->ui.ips = &ui->_ips[0];
+ ui->ui.ips[0] = first_ip;
+ ui->ui.cur_ip = 1;
+ ui->ui.max_ips = max_stack;
+ ui->ui.unw_word_t_size = sizeof(unw_word_t);
+ ui->ui.e_machine = EM_I386;
+ ui->ui.best_effort = best_effort;
+
+ ret = unw_init_remote(&ui->_cursor, addr_space, &ui->ui);
+ if (ret) {
+ if (!best_effort)
+ pr_err("libunwind: %s\n", unw_strerror(ret));
+ free(ui);
+ return NULL;
+ }
+
+ return &ui->ui;
+#else
+ return NULL;
+#endif
+}
+
+int __libunwind_arch__unwind_step_i386(struct unwind_info *ui __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_X86_SUPPORT
+ int ret;
+
+ if (ui->cur_ip >= ui->max_ips)
+ return -1;
+
+ ret = unw_step(ui->cursor);
+ if (ret > 0) {
+ uint64_t ip;
+
+ unw_get_reg(ui->cursor, UNW_REG_IP, &ip);
+
+ if (unw_is_signal_frame(ui->cursor) <= 0) {
+ /*
+ * Decrement the IP for any non-activation frames. This
+ * is required to properly find the srcline for caller
+ * frames. See also the documentation for
+ * dwfl_frame_pc(), which this code tries to replicate.
+ */
+ --ip;
+ }
+ ui->ips[ui->cur_ip++] = ip;
+ }
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
diff --git a/tools/perf/util/libunwind-arch/libunwind-loongarch.c b/tools/perf/util/libunwind-arch/libunwind-loongarch.c
index 837aa11e2b9f..d86397598a9d 100644
--- a/tools/perf/util/libunwind-arch/libunwind-loongarch.c
+++ b/tools/perf/util/libunwind-arch/libunwind-loongarch.c
@@ -2,8 +2,12 @@
#include "libunwind-arch.h"
#include "../debug.h"
#include "../maps.h"
+#include "../thread.h"
#include "../../../arch/loongarch/include/uapi/asm/perf_regs.h"
#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <linux/zalloc.h>
+#include <elf.h>
#include <errno.h>

#ifdef HAVE_LIBUNWIND_LOONGARCH64_SUPPORT
@@ -40,3 +44,254 @@ void __libunwind_arch__finish_access_loongarch(struct maps *maps __maybe_unused)
unw_destroy_addr_space(maps__addr_space(maps));
#endif
}
+
+#ifdef HAVE_LIBUNWIND_LOONGARCH64_SUPPORT
+static int find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+ int need_unwind_info, void *arg)
+{
+ return __libunwind__find_proc_info(as, ip, pi, need_unwind_info, arg, sizeof(unw_word_t));
+}
+
+static void put_unwind_info(unw_addr_space_t __maybe_unused as,
+ unw_proc_info_t *pi __maybe_unused,
+ void *arg __maybe_unused)
+{
+ pr_debug("unwind: put_unwind_info called\n");
+}
+
+static int get_dyn_info_list_addr(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused *dil_addr,
+ void __maybe_unused *arg)
+{
+ return -UNW_ENOINFO;
+}
+
+static int access_mem(unw_addr_space_t as, unw_word_t addr, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_mem(as, addr, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_reg(unw_addr_space_t as, unw_regnum_t regnum, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_reg(as, regnum, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_fpreg(unw_addr_space_t __maybe_unused as,
+ unw_regnum_t __maybe_unused num,
+ unw_fpreg_t __maybe_unused *val,
+ int __maybe_unused __write,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: access_fpreg unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int resume(unw_addr_space_t __maybe_unused as,
+ unw_cursor_t __maybe_unused *cu,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: resume unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int get_proc_name(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused addr,
+ char __maybe_unused *bufp, size_t __maybe_unused buf_len,
+ unw_word_t __maybe_unused *offp, void __maybe_unused *arg)
+{
+ pr_err("unwind: get_proc_name unsupported\n");
+ return -UNW_EINVAL;
+}
+#endif
+
+void *__libunwind_arch__create_addr_space_loongarch(void)
+{
+#ifdef HAVE_LIBUNWIND_LOONGARCH64_SUPPORT
+ static unw_accessors_t accessors = {
+ .find_proc_info = find_proc_info,
+ .put_unwind_info = put_unwind_info,
+ .get_dyn_info_list_addr = get_dyn_info_list_addr,
+ .access_mem = access_mem,
+ .access_reg = access_reg,
+ .access_fpreg = access_fpreg,
+ .resume = resume,
+ .get_proc_name = get_proc_name,
+ };
+ unw_addr_space_t addr_space;
+
+ addr_space = unw_create_addr_space(&accessors, /*byte_order=*/0);
+ unw_set_caching_policy(addr_space, UNW_CACHE_GLOBAL);
+ return addr_space;
+#else
+ return NULL;
+#endif
+}
+
+#ifdef HAVE_LIBUNWIND_LOONGARCH_SUPPORT
+extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
+ unw_word_t ip,
+ unw_dyn_info_t *di,
+ unw_proc_info_t *pi,
+ int need_unwind_info, void *arg);
+#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
+#endif
+
+int __libunwind_arch__dwarf_search_unwind_table_loongarch(void *as __maybe_unused,
+ uint64_t ip __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ void *pi __maybe_unused,
+ int need_unwind_info __maybe_unused,
+ void *arg __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_LOONGARCH_SUPPORT
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_search_unwind_table(as, ip, &di, pi, need_unwind_info, arg);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+#if defined(HAVE_LIBUNWIND_LOONGARCH_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_LOONGARCH)
+extern int UNW_OBJ(dwarf_find_debug_frame) (int found, unw_dyn_info_t *di_debug,
+ unw_word_t ip,
+ unw_word_t segbase,
+ const char *obj_name, unw_word_t start,
+ unw_word_t end);
+#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)
+#endif
+
+int __libunwind_arch__dwarf_find_debug_frame_loongarch(int found __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ uint64_t ip __maybe_unused,
+ uint64_t segbase __maybe_unused,
+ const char *obj_name __maybe_unused,
+ uint64_t start __maybe_unused,
+ uint64_t end __maybe_unused)
+{
+#if defined(HAVE_LIBUNWIND_LOONGARCH_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_LOONGARCH)
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_find_debug_frame(found, &di, ip, segbase, obj_name, start, end);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+struct unwind_info *__libunwind_arch_unwind_info__new_loongarch(struct thread *thread __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ int max_stack __maybe_unused,
+ bool best_effort __maybe_unused,
+ uint64_t first_ip __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_LOONGARCH_SUPPORT
+ struct arch_unwind_info {
+ struct unwind_info ui;
+ unw_cursor_t _cursor;
+ uint64_t _ips[];
+ };
+
+ struct maps *maps = thread__maps(thread);
+ void *addr_space = maps__addr_space(maps);
+ struct arch_unwind_info *ui;
+ int ret;
+
+ if (addr_space == NULL)
+ return NULL;
+
+ ui = zalloc(sizeof(*ui) + sizeof(ui->_ips[0]) * max_stack);
+ if (!ui)
+ return NULL;
+
+ ui->ui.machine = maps__machine(maps);
+ ui->ui.thread = thread;
+ ui->ui.sample = sample;
+ ui->ui.cursor = &ui->_cursor;
+ ui->ui.ips = &ui->_ips[0];
+ ui->ui.ips[0] = first_ip;
+ ui->ui.cur_ip = 1;
+ ui->ui.max_ips = max_stack;
+ ui->ui.unw_word_t_size = sizeof(unw_word_t);
+ ui->ui.e_machine = EM_LOONGARCH;
+ ui->ui.best_effort = best_effort;
+
+ ret = unw_init_remote(&ui->_cursor, addr_space, &ui->ui);
+ if (ret) {
+ if (!best_effort)
+ pr_err("libunwind: %s\n", unw_strerror(ret));
+ free(ui);
+ return NULL;
+ }
+
+ return &ui->ui;
+#else
+ return NULL;
+#endif
+}
+
+int __libunwind_arch__unwind_step_loongarch(struct unwind_info *ui __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_LOONGARCH_SUPPORT
+ int ret;
+
+ if (ui->cur_ip >= ui->max_ips)
+ return -1;
+
+ ret = unw_step(ui->cursor);
+ if (ret > 0) {
+ uint64_t ip;
+
+ unw_get_reg(ui->cursor, UNW_REG_IP, &ip);
+
+ if (unw_is_signal_frame(ui->cursor) <= 0) {
+ /*
+ * Decrement the IP for any non-activation frames. This
+ * is required to properly find the srcline for caller
+ * frames. See also the documentation for
+ * dwfl_frame_pc(), which this code tries to replicate.
+ */
+ --ip;
+ }
+ ui->ips[ui->cur_ip++] = ip;
+ }
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
diff --git a/tools/perf/util/libunwind-arch/libunwind-mips.c b/tools/perf/util/libunwind-arch/libunwind-mips.c
index 1fa81742ff4a..91ee3c27d159 100644
--- a/tools/perf/util/libunwind-arch/libunwind-mips.c
+++ b/tools/perf/util/libunwind-arch/libunwind-mips.c
@@ -2,8 +2,12 @@
#include "libunwind-arch.h"
#include "../debug.h"
#include "../maps.h"
+#include "../thread.h"
#include "../../../arch/mips/include/uapi/asm/perf_regs.h"
#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <linux/zalloc.h>
+#include <elf.h>
#include <errno.h>

#ifdef HAVE_LIBUNWIND_MIPS_SUPPORT
@@ -42,3 +46,254 @@ void __libunwind_arch__finish_access_mips(struct maps *maps __maybe_unused)
unw_destroy_addr_space(maps__addr_space(maps));
#endif
}
+
+#ifdef HAVE_LIBUNWIND_MIPS_SUPPORT
+static int find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+ int need_unwind_info, void *arg)
+{
+ return __libunwind__find_proc_info(as, ip, pi, need_unwind_info, arg, sizeof(unw_word_t));
+}
+
+static void put_unwind_info(unw_addr_space_t __maybe_unused as,
+ unw_proc_info_t *pi __maybe_unused,
+ void *arg __maybe_unused)
+{
+ pr_debug("unwind: put_unwind_info called\n");
+}
+
+static int get_dyn_info_list_addr(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused *dil_addr,
+ void __maybe_unused *arg)
+{
+ return -UNW_ENOINFO;
+}
+
+static int access_mem(unw_addr_space_t as, unw_word_t addr, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_mem(as, addr, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_reg(unw_addr_space_t as, unw_regnum_t regnum, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_reg(as, regnum, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_fpreg(unw_addr_space_t __maybe_unused as,
+ unw_regnum_t __maybe_unused num,
+ unw_fpreg_t __maybe_unused *val,
+ int __maybe_unused __write,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: access_fpreg unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int resume(unw_addr_space_t __maybe_unused as,
+ unw_cursor_t __maybe_unused *cu,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: resume unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int get_proc_name(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused addr,
+ char __maybe_unused *bufp, size_t __maybe_unused buf_len,
+ unw_word_t __maybe_unused *offp, void __maybe_unused *arg)
+{
+ pr_err("unwind: get_proc_name unsupported\n");
+ return -UNW_EINVAL;
+}
+#endif
+
+void *__libunwind_arch__create_addr_space_mips(void)
+{
+#ifdef HAVE_LIBUNWIND_MIPS_SUPPORT
+ static unw_accessors_t accessors = {
+ .find_proc_info = find_proc_info,
+ .put_unwind_info = put_unwind_info,
+ .get_dyn_info_list_addr = get_dyn_info_list_addr,
+ .access_mem = access_mem,
+ .access_reg = access_reg,
+ .access_fpreg = access_fpreg,
+ .resume = resume,
+ .get_proc_name = get_proc_name,
+ };
+ unw_addr_space_t addr_space;
+
+ addr_space = unw_create_addr_space(&accessors, /*byte_order=*/0);
+ unw_set_caching_policy(addr_space, UNW_CACHE_GLOBAL);
+ return addr_space;
+#else
+ return NULL;
+#endif
+}
+
+#ifdef HAVE_LIBUNWIND_MIPS_SUPPORT
+extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
+ unw_word_t ip,
+ unw_dyn_info_t *di,
+ unw_proc_info_t *pi,
+ int need_unwind_info, void *arg);
+#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
+#endif
+
+int __libunwind_arch__dwarf_search_unwind_table_mips(void *as __maybe_unused,
+ uint64_t ip __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ void *pi __maybe_unused,
+ int need_unwind_info __maybe_unused,
+ void *arg __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_MIPS_SUPPORT
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_search_unwind_table(as, ip, &di, pi, need_unwind_info, arg);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+#if defined(HAVE_LIBUNWIND_MIPS_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_MIPS)
+extern int UNW_OBJ(dwarf_find_debug_frame) (int found, unw_dyn_info_t *di_debug,
+ unw_word_t ip,
+ unw_word_t segbase,
+ const char *obj_name, unw_word_t start,
+ unw_word_t end);
+#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)
+#endif
+
+int __libunwind_arch__dwarf_find_debug_frame_mips(int found __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ uint64_t ip __maybe_unused,
+ uint64_t segbase __maybe_unused,
+ const char *obj_name __maybe_unused,
+ uint64_t start __maybe_unused,
+ uint64_t end __maybe_unused)
+{
+#if defined(HAVE_LIBUNWIND_MIPS_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_MIPS)
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_find_debug_frame(found, &di, ip, segbase, obj_name, start, end);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+struct unwind_info *__libunwind_arch_unwind_info__new_mips(struct thread *thread __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ int max_stack __maybe_unused,
+ bool best_effort __maybe_unused,
+ uint64_t first_ip __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_MIPS_SUPPORT
+ struct arch_unwind_info {
+ struct unwind_info ui;
+ unw_cursor_t _cursor;
+ uint64_t _ips[];
+ };
+
+ struct maps *maps = thread__maps(thread);
+ void *addr_space = maps__addr_space(maps);
+ struct arch_unwind_info *ui;
+ int ret;
+
+ if (addr_space == NULL)
+ return NULL;
+
+ ui = zalloc(sizeof(*ui) + sizeof(ui->_ips[0]) * max_stack);
+ if (!ui)
+ return NULL;
+
+ ui->ui.machine = maps__machine(maps);
+ ui->ui.thread = thread;
+ ui->ui.sample = sample;
+ ui->ui.cursor = &ui->_cursor;
+ ui->ui.ips = &ui->_ips[0];
+ ui->ui.ips[0] = first_ip;
+ ui->ui.cur_ip = 1;
+ ui->ui.max_ips = max_stack;
+ ui->ui.unw_word_t_size = sizeof(unw_word_t);
+ ui->ui.e_machine = EM_MIPS;
+ ui->ui.best_effort = best_effort;
+
+ ret = unw_init_remote(&ui->_cursor, addr_space, &ui->ui);
+ if (ret) {
+ if (!best_effort)
+ pr_err("libunwind: %s\n", unw_strerror(ret));
+ free(ui);
+ return NULL;
+ }
+
+ return &ui->ui;
+#else
+ return NULL;
+#endif
+}
+
+int __libunwind_arch__unwind_step_mips(struct unwind_info *ui __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_MIPS_SUPPORT
+ int ret;
+
+ if (ui->cur_ip >= ui->max_ips)
+ return -1;
+
+ ret = unw_step(ui->cursor);
+ if (ret > 0) {
+ uint64_t ip;
+
+ unw_get_reg(ui->cursor, UNW_REG_IP, &ip);
+
+ if (unw_is_signal_frame(ui->cursor) <= 0) {
+ /*
+ * Decrement the IP for any non-activation frames. This
+ * is required to properly find the srcline for caller
+ * frames. See also the documentation for
+ * dwfl_frame_pc(), which this code tries to replicate.
+ */
+ --ip;
+ }
+ ui->ips[ui->cur_ip++] = ip;
+ }
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
diff --git a/tools/perf/util/libunwind-arch/libunwind-ppc32.c b/tools/perf/util/libunwind-arch/libunwind-ppc32.c
index fa8471c74bf3..b80d3184a28d 100644
--- a/tools/perf/util/libunwind-arch/libunwind-ppc32.c
+++ b/tools/perf/util/libunwind-arch/libunwind-ppc32.c
@@ -2,8 +2,12 @@
#include "libunwind-arch.h"
#include "../debug.h"
#include "../maps.h"
+#include "../thread.h"
#include "../../../arch/powerpc/include/uapi/asm/perf_regs.h"
#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <linux/zalloc.h>
+#include <elf.h>
#include <errno.h>

#ifdef HAVE_LIBUNWIND_PPC32_SUPPORT
@@ -44,3 +48,254 @@ void __libunwind_arch__finish_access_ppc32(struct maps *maps __maybe_unused)
unw_destroy_addr_space(maps__addr_space(maps));
#endif
}
+
+#ifdef HAVE_LIBUNWIND_PPC32_SUPPORT
+static int find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+ int need_unwind_info, void *arg)
+{
+ return __libunwind__find_proc_info(as, ip, pi, need_unwind_info, arg, sizeof(unw_word_t));
+}
+
+static void put_unwind_info(unw_addr_space_t __maybe_unused as,
+ unw_proc_info_t *pi __maybe_unused,
+ void *arg __maybe_unused)
+{
+ pr_debug("unwind: put_unwind_info called\n");
+}
+
+static int get_dyn_info_list_addr(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused *dil_addr,
+ void __maybe_unused *arg)
+{
+ return -UNW_ENOINFO;
+}
+
+static int access_mem(unw_addr_space_t as, unw_word_t addr, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_mem(as, addr, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_reg(unw_addr_space_t as, unw_regnum_t regnum, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_reg(as, regnum, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_fpreg(unw_addr_space_t __maybe_unused as,
+ unw_regnum_t __maybe_unused num,
+ unw_fpreg_t __maybe_unused *val,
+ int __maybe_unused __write,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: access_fpreg unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int resume(unw_addr_space_t __maybe_unused as,
+ unw_cursor_t __maybe_unused *cu,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: resume unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int get_proc_name(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused addr,
+ char __maybe_unused *bufp, size_t __maybe_unused buf_len,
+ unw_word_t __maybe_unused *offp, void __maybe_unused *arg)
+{
+ pr_err("unwind: get_proc_name unsupported\n");
+ return -UNW_EINVAL;
+}
+#endif
+
+void *__libunwind_arch__create_addr_space_ppc32(void)
+{
+#ifdef HAVE_LIBUNWIND_PPC32_SUPPORT
+ static unw_accessors_t accessors = {
+ .find_proc_info = find_proc_info,
+ .put_unwind_info = put_unwind_info,
+ .get_dyn_info_list_addr = get_dyn_info_list_addr,
+ .access_mem = access_mem,
+ .access_reg = access_reg,
+ .access_fpreg = access_fpreg,
+ .resume = resume,
+ .get_proc_name = get_proc_name,
+ };
+ unw_addr_space_t addr_space;
+
+ addr_space = unw_create_addr_space(&accessors, /*byte_order=*/0);
+ unw_set_caching_policy(addr_space, UNW_CACHE_GLOBAL);
+ return addr_space;
+#else
+ return NULL;
+#endif
+}
+
+#ifdef HAVE_LIBUNWIND_PPC32_SUPPORT
+extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
+ unw_word_t ip,
+ unw_dyn_info_t *di,
+ unw_proc_info_t *pi,
+ int need_unwind_info, void *arg);
+#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
+#endif
+
+int __libunwind_arch__dwarf_search_unwind_table_ppc32(void *as __maybe_unused,
+ uint64_t ip __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ void *pi __maybe_unused,
+ int need_unwind_info __maybe_unused,
+ void *arg __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_PPC32_SUPPORT
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_search_unwind_table(as, ip, &di, pi, need_unwind_info, arg);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+#if defined(HAVE_LIBUNWIND_PPC32_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_PPC32)
+extern int UNW_OBJ(dwarf_find_debug_frame) (int found, unw_dyn_info_t *di_debug,
+ unw_word_t ip,
+ unw_word_t segbase,
+ const char *obj_name, unw_word_t start,
+ unw_word_t end);
+#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)
+#endif
+
+int __libunwind_arch__dwarf_find_debug_frame_ppc32(int found __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ uint64_t ip __maybe_unused,
+ uint64_t segbase __maybe_unused,
+ const char *obj_name __maybe_unused,
+ uint64_t start __maybe_unused,
+ uint64_t end __maybe_unused)
+{
+#if defined(HAVE_LIBUNWIND_PPC32_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_PPC32)
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_find_debug_frame(found, &di, ip, segbase, obj_name, start, end);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+struct unwind_info *__libunwind_arch_unwind_info__new_ppc32(struct thread *thread __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ int max_stack __maybe_unused,
+ bool best_effort __maybe_unused,
+ uint64_t first_ip __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_PPC32_SUPPORT
+ struct arch_unwind_info {
+ struct unwind_info ui;
+ unw_cursor_t _cursor;
+ uint64_t _ips[];
+ };
+
+ struct maps *maps = thread__maps(thread);
+ void *addr_space = maps__addr_space(maps);
+ struct arch_unwind_info *ui;
+ int ret;
+
+ if (addr_space == NULL)
+ return NULL;
+
+ ui = zalloc(sizeof(*ui) + sizeof(ui->_ips[0]) * max_stack);
+ if (!ui)
+ return NULL;
+
+ ui->ui.machine = maps__machine(maps);
+ ui->ui.thread = thread;
+ ui->ui.sample = sample;
+ ui->ui.cursor = &ui->_cursor;
+ ui->ui.ips = &ui->_ips[0];
+ ui->ui.ips[0] = first_ip;
+ ui->ui.cur_ip = 1;
+ ui->ui.max_ips = max_stack;
+ ui->ui.unw_word_t_size = sizeof(unw_word_t);
+ ui->ui.e_machine = EM_PPC;
+ ui->ui.best_effort = best_effort;
+
+ ret = unw_init_remote(&ui->_cursor, addr_space, &ui->ui);
+ if (ret) {
+ if (!best_effort)
+ pr_err("libunwind: %s\n", unw_strerror(ret));
+ free(ui);
+ return NULL;
+ }
+
+ return &ui->ui;
+#else
+ return NULL;
+#endif
+}
+
+int __libunwind_arch__unwind_step_ppc32(struct unwind_info *ui __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_PPC32_SUPPORT
+ int ret;
+
+ if (ui->cur_ip >= ui->max_ips)
+ return -1;
+
+ ret = unw_step(ui->cursor);
+ if (ret > 0) {
+ uint64_t ip;
+
+ unw_get_reg(ui->cursor, UNW_REG_IP, &ip);
+
+ if (unw_is_signal_frame(ui->cursor) <= 0) {
+ /*
+ * Decrement the IP for any non-activation frames. This
+ * is required to properly find the srcline for caller
+ * frames. See also the documentation for
+ * dwfl_frame_pc(), which this code tries to replicate.
+ */
+ --ip;
+ }
+ ui->ips[ui->cur_ip++] = ip;
+ }
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
diff --git a/tools/perf/util/libunwind-arch/libunwind-ppc64.c b/tools/perf/util/libunwind-arch/libunwind-ppc64.c
index 2f746e347336..cbe3b476203f 100644
--- a/tools/perf/util/libunwind-arch/libunwind-ppc64.c
+++ b/tools/perf/util/libunwind-arch/libunwind-ppc64.c
@@ -2,8 +2,12 @@
#include "libunwind-arch.h"
#include "../debug.h"
#include "../maps.h"
+#include "../thread.h"
#include "../../../arch/powerpc/include/uapi/asm/perf_regs.h"
#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <linux/zalloc.h>
+#include <elf.h>
#include <errno.h>

#ifdef HAVE_LIBUNWIND_PPC64_SUPPORT
@@ -46,3 +50,254 @@ void __libunwind_arch__finish_access_ppc64(struct maps *maps __maybe_unused)
unw_destroy_addr_space(maps__addr_space(maps));
#endif
}
+
+#ifdef HAVE_LIBUNWIND_PPC64_SUPPORT
+static int find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+ int need_unwind_info, void *arg)
+{
+ return __libunwind__find_proc_info(as, ip, pi, need_unwind_info, arg, sizeof(unw_word_t));
+}
+
+static void put_unwind_info(unw_addr_space_t __maybe_unused as,
+ unw_proc_info_t *pi __maybe_unused,
+ void *arg __maybe_unused)
+{
+ pr_debug("unwind: put_unwind_info called\n");
+}
+
+static int get_dyn_info_list_addr(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused *dil_addr,
+ void __maybe_unused *arg)
+{
+ return -UNW_ENOINFO;
+}
+
+static int access_mem(unw_addr_space_t as, unw_word_t addr, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_mem(as, addr, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_reg(unw_addr_space_t as, unw_regnum_t regnum, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_reg(as, regnum, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_fpreg(unw_addr_space_t __maybe_unused as,
+ unw_regnum_t __maybe_unused num,
+ unw_fpreg_t __maybe_unused *val,
+ int __maybe_unused __write,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: access_fpreg unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int resume(unw_addr_space_t __maybe_unused as,
+ unw_cursor_t __maybe_unused *cu,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: resume unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int get_proc_name(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused addr,
+ char __maybe_unused *bufp, size_t __maybe_unused buf_len,
+ unw_word_t __maybe_unused *offp, void __maybe_unused *arg)
+{
+ pr_err("unwind: get_proc_name unsupported\n");
+ return -UNW_EINVAL;
+}
+#endif
+
+void *__libunwind_arch__create_addr_space_ppc64(void)
+{
+#ifdef HAVE_LIBUNWIND_PPC64_SUPPORT
+ static unw_accessors_t accessors = {
+ .find_proc_info = find_proc_info,
+ .put_unwind_info = put_unwind_info,
+ .get_dyn_info_list_addr = get_dyn_info_list_addr,
+ .access_mem = access_mem,
+ .access_reg = access_reg,
+ .access_fpreg = access_fpreg,
+ .resume = resume,
+ .get_proc_name = get_proc_name,
+ };
+ unw_addr_space_t addr_space;
+
+ addr_space = unw_create_addr_space(&accessors, /*byte_order=*/0);
+ unw_set_caching_policy(addr_space, UNW_CACHE_GLOBAL);
+ return addr_space;
+#else
+ return NULL;
+#endif
+}
+
+#ifdef HAVE_LIBUNWIND_PPC64_SUPPORT
+extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
+ unw_word_t ip,
+ unw_dyn_info_t *di,
+ unw_proc_info_t *pi,
+ int need_unwind_info, void *arg);
+#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
+#endif
+
+int __libunwind_arch__dwarf_search_unwind_table_ppc64(void *as __maybe_unused,
+ uint64_t ip __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ void *pi __maybe_unused,
+ int need_unwind_info __maybe_unused,
+ void *arg __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_PPC64_SUPPORT
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_search_unwind_table(as, ip, &di, pi, need_unwind_info, arg);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+#if defined(HAVE_LIBUNWIND_PPC64_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_PPC64)
+extern int UNW_OBJ(dwarf_find_debug_frame) (int found, unw_dyn_info_t *di_debug,
+ unw_word_t ip,
+ unw_word_t segbase,
+ const char *obj_name, unw_word_t start,
+ unw_word_t end);
+#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)
+#endif
+
+int __libunwind_arch__dwarf_find_debug_frame_ppc64(int found __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ uint64_t ip __maybe_unused,
+ uint64_t segbase __maybe_unused,
+ const char *obj_name __maybe_unused,
+ uint64_t start __maybe_unused,
+ uint64_t end __maybe_unused)
+{
+#if defined(HAVE_LIBUNWIND_PPC64_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_PPC64)
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_find_debug_frame(found, &di, ip, segbase, obj_name, start, end);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+struct unwind_info *__libunwind_arch_unwind_info__new_ppc64(struct thread *thread __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ int max_stack __maybe_unused,
+ bool best_effort __maybe_unused,
+ uint64_t first_ip __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_PPC64_SUPPORT
+ struct arch_unwind_info {
+ struct unwind_info ui;
+ unw_cursor_t _cursor;
+ uint64_t _ips[];
+ };
+
+ struct maps *maps = thread__maps(thread);
+ void *addr_space = maps__addr_space(maps);
+ struct arch_unwind_info *ui;
+ int ret;
+
+ if (addr_space == NULL)
+ return NULL;
+
+ ui = zalloc(sizeof(*ui) + sizeof(ui->_ips[0]) * max_stack);
+ if (!ui)
+ return NULL;
+
+ ui->ui.machine = maps__machine(maps);
+ ui->ui.thread = thread;
+ ui->ui.sample = sample;
+ ui->ui.cursor = &ui->_cursor;
+ ui->ui.ips = &ui->_ips[0];
+ ui->ui.ips[0] = first_ip;
+ ui->ui.cur_ip = 1;
+ ui->ui.max_ips = max_stack;
+ ui->ui.unw_word_t_size = sizeof(unw_word_t);
+ ui->ui.e_machine = EM_PPC64;
+ ui->ui.best_effort = best_effort;
+
+ ret = unw_init_remote(&ui->_cursor, addr_space, &ui->ui);
+ if (ret) {
+ if (!best_effort)
+ pr_err("libunwind: %s\n", unw_strerror(ret));
+ free(ui);
+ return NULL;
+ }
+
+ return &ui->ui;
+#else
+ return NULL;
+#endif
+}
+
+int __libunwind_arch__unwind_step_ppc64(struct unwind_info *ui __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_PPC64_SUPPORT
+ int ret;
+
+ if (ui->cur_ip >= ui->max_ips)
+ return -1;
+
+ ret = unw_step(ui->cursor);
+ if (ret > 0) {
+ uint64_t ip;
+
+ unw_get_reg(ui->cursor, UNW_REG_IP, &ip);
+
+ if (unw_is_signal_frame(ui->cursor) <= 0) {
+ /*
+ * Decrement the IP for any non-activation frames. This
+ * is required to properly find the srcline for caller
+ * frames. See also the documentation for
+ * dwfl_frame_pc(), which this code tries to replicate.
+ */
+ --ip;
+ }
+ ui->ips[ui->cur_ip++] = ip;
+ }
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
diff --git a/tools/perf/util/libunwind-arch/libunwind-s390.c b/tools/perf/util/libunwind-arch/libunwind-s390.c
index 9f68d15438b2..ce3788e86d1f 100644
--- a/tools/perf/util/libunwind-arch/libunwind-s390.c
+++ b/tools/perf/util/libunwind-arch/libunwind-s390.c
@@ -2,8 +2,12 @@
#include "libunwind-arch.h"
#include "../debug.h"
#include "../maps.h"
+#include "../thread.h"
#include "../../../arch/s390/include/uapi/asm/perf_regs.h"
#include <linux/compiler.h>
+#include <linux/kernel.h>
+#include <linux/zalloc.h>
+#include <elf.h>
#include <errno.h>

#ifdef HAVE_LIBUNWIND_S390X_SUPPORT
@@ -42,3 +46,254 @@ void __libunwind_arch__finish_access_s390(struct maps *maps __maybe_unused)
unw_destroy_addr_space(maps__addr_space(maps));
#endif
}
+
+#ifdef HAVE_LIBUNWIND_S390X_SUPPORT
+static int find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+ int need_unwind_info, void *arg)
+{
+ return __libunwind__find_proc_info(as, ip, pi, need_unwind_info, arg, sizeof(unw_word_t));
+}
+
+static void put_unwind_info(unw_addr_space_t __maybe_unused as,
+ unw_proc_info_t *pi __maybe_unused,
+ void *arg __maybe_unused)
+{
+ pr_debug("unwind: put_unwind_info called\n");
+}
+
+static int get_dyn_info_list_addr(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused *dil_addr,
+ void __maybe_unused *arg)
+{
+ return -UNW_ENOINFO;
+}
+
+static int access_mem(unw_addr_space_t as, unw_word_t addr, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_mem(as, addr, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_reg(unw_addr_space_t as, unw_regnum_t regnum, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_reg(as, regnum, valp, __write, arg, sizeof(unw_word_t));
+}
+
+static int access_fpreg(unw_addr_space_t __maybe_unused as,
+ unw_regnum_t __maybe_unused num,
+ unw_fpreg_t __maybe_unused *val,
+ int __maybe_unused __write,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: access_fpreg unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int resume(unw_addr_space_t __maybe_unused as,
+ unw_cursor_t __maybe_unused *cu,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: resume unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int get_proc_name(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused addr,
+ char __maybe_unused *bufp, size_t __maybe_unused buf_len,
+ unw_word_t __maybe_unused *offp, void __maybe_unused *arg)
+{
+ pr_err("unwind: get_proc_name unsupported\n");
+ return -UNW_EINVAL;
+}
+#endif
+
+void *__libunwind_arch__create_addr_space_s390(void)
+{
+#ifdef HAVE_LIBUNWIND_S390X_SUPPORT
+ static unw_accessors_t accessors = {
+ .find_proc_info = find_proc_info,
+ .put_unwind_info = put_unwind_info,
+ .get_dyn_info_list_addr = get_dyn_info_list_addr,
+ .access_mem = access_mem,
+ .access_reg = access_reg,
+ .access_fpreg = access_fpreg,
+ .resume = resume,
+ .get_proc_name = get_proc_name,
+ };
+ unw_addr_space_t addr_space;
+
+ addr_space = unw_create_addr_space(&accessors, /*byte_order=*/0);
+ unw_set_caching_policy(addr_space, UNW_CACHE_GLOBAL);
+ return addr_space;
+#else
+ return NULL;
+#endif
+}
+
+#ifdef HAVE_LIBUNWIND_S390X_SUPPORT
+extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
+ unw_word_t ip,
+ unw_dyn_info_t *di,
+ unw_proc_info_t *pi,
+ int need_unwind_info, void *arg);
+#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
+#endif
+
+int __libunwind_arch__dwarf_search_unwind_table_s390(void *as __maybe_unused,
+ uint64_t ip __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ void *pi __maybe_unused,
+ int need_unwind_info __maybe_unused,
+ void *arg __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_S390X_SUPPORT
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_search_unwind_table(as, ip, &di, pi, need_unwind_info, arg);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+#if defined(HAVE_LIBUNWIND_S390X_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_S390X)
+extern int UNW_OBJ(dwarf_find_debug_frame) (int found, unw_dyn_info_t *di_debug,
+ unw_word_t ip,
+ unw_word_t segbase,
+ const char *obj_name, unw_word_t start,
+ unw_word_t end);
+#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)
+#endif
+
+int __libunwind_arch__dwarf_find_debug_frame_s390(int found __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ uint64_t ip __maybe_unused,
+ uint64_t segbase __maybe_unused,
+ const char *obj_name __maybe_unused,
+ uint64_t start __maybe_unused,
+ uint64_t end __maybe_unused)
+{
+#if defined(HAVE_LIBUNWIND_S390X_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_S390X)
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_find_debug_frame(found, &di, ip, segbase, obj_name, start, end);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+struct unwind_info *__libunwind_arch_unwind_info__new_s390(struct thread *thread __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ int max_stack __maybe_unused,
+ bool best_effort __maybe_unused,
+ uint64_t first_ip __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_S390X_SUPPORT
+ struct arch_unwind_info {
+ struct unwind_info ui;
+ unw_cursor_t _cursor;
+ uint64_t _ips[];
+ };
+
+ struct maps *maps = thread__maps(thread);
+ void *addr_space = maps__addr_space(maps);
+ struct arch_unwind_info *ui;
+ int ret;
+
+ if (addr_space == NULL)
+ return NULL;
+
+ ui = zalloc(sizeof(*ui) + sizeof(ui->_ips[0]) * max_stack);
+ if (!ui)
+ return NULL;
+
+ ui->ui.machine = maps__machine(maps);
+ ui->ui.thread = thread;
+ ui->ui.sample = sample;
+ ui->ui.cursor = &ui->_cursor;
+ ui->ui.ips = &ui->_ips[0];
+ ui->ui.ips[0] = first_ip;
+ ui->ui.cur_ip = 1;
+ ui->ui.max_ips = max_stack;
+ ui->ui.unw_word_t_size = sizeof(unw_word_t);
+ ui->ui.e_machine = EM_S390;
+ ui->ui.best_effort = best_effort;
+
+ ret = unw_init_remote(&ui->_cursor, addr_space, &ui->ui);
+ if (ret) {
+ if (!best_effort)
+ pr_err("libunwind: %s\n", unw_strerror(ret));
+ free(ui);
+ return NULL;
+ }
+
+ return &ui->ui;
+#else
+ return NULL;
+#endif
+}
+
+int __libunwind_arch__unwind_step_s390(struct unwind_info *ui __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_S390X_SUPPORT
+ int ret;
+
+ if (ui->cur_ip >= ui->max_ips)
+ return -1;
+
+ ret = unw_step(ui->cursor);
+ if (ret > 0) {
+ uint64_t ip;
+
+ unw_get_reg(ui->cursor, UNW_REG_IP, &ip);
+
+ if (unw_is_signal_frame(ui->cursor) <= 0) {
+ /*
+ * Decrement the IP for any non-activation frames. This
+ * is required to properly find the srcline for caller
+ * frames. See also the documentation for
+ * dwfl_frame_pc(), which this code tries to replicate.
+ */
+ --ip;
+ }
+ ui->ips[ui->cur_ip++] = ip;
+ }
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
diff --git a/tools/perf/util/libunwind-arch/libunwind-x86_64.c b/tools/perf/util/libunwind-arch/libunwind-x86_64.c
index 25e326bd3e15..8ca66d442ffc 100644
--- a/tools/perf/util/libunwind-arch/libunwind-x86_64.c
+++ b/tools/perf/util/libunwind-arch/libunwind-x86_64.c
@@ -2,9 +2,12 @@
#include "libunwind-arch.h"
#include "../debug.h"
#include "../maps.h"
+#include "../thread.h"
#include "../../../arch/x86/include/uapi/asm/perf_regs.h"
#include <linux/compiler.h>
#include <linux/kernel.h>
+#include <linux/zalloc.h>
+#include <elf.h>
#include <errno.h>

#ifdef HAVE_LIBUNWIND_X86_64_SUPPORT
@@ -65,3 +68,253 @@ void __libunwind_arch__finish_access_x86_64(struct maps *maps __maybe_unused)
unw_destroy_addr_space(maps__addr_space(maps));
#endif
}
+
+#ifdef HAVE_LIBUNWIND_X86_64_SUPPORT
+static int find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+ int need_unwind_info, void *arg)
+{
+ return __libunwind__find_proc_info(as, ip, pi, need_unwind_info, arg);
+}
+
+static void put_unwind_info(unw_addr_space_t __maybe_unused as,
+ unw_proc_info_t *pi __maybe_unused,
+ void *arg __maybe_unused)
+{
+ pr_debug("unwind: put_unwind_info called\n");
+}
+
+static int get_dyn_info_list_addr(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused *dil_addr,
+ void __maybe_unused *arg)
+{
+ return -UNW_ENOINFO;
+}
+
+static int access_mem(unw_addr_space_t as, unw_word_t addr, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_mem(as, addr, valp, __write, arg);
+}
+
+static int access_reg(unw_addr_space_t as, unw_regnum_t regnum, unw_word_t *valp,
+ int __write, void *arg)
+{
+ return __libunwind__access_reg(as, regnum, valp, __write, arg);
+}
+
+static int access_fpreg(unw_addr_space_t __maybe_unused as,
+ unw_regnum_t __maybe_unused num,
+ unw_fpreg_t __maybe_unused *val,
+ int __maybe_unused __write,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: access_fpreg unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int resume(unw_addr_space_t __maybe_unused as,
+ unw_cursor_t __maybe_unused *cu,
+ void __maybe_unused *arg)
+{
+ pr_err("unwind: resume unsupported\n");
+ return -UNW_EINVAL;
+}
+
+static int get_proc_name(unw_addr_space_t __maybe_unused as,
+ unw_word_t __maybe_unused addr,
+ char __maybe_unused *bufp, size_t __maybe_unused buf_len,
+ unw_word_t __maybe_unused *offp, void __maybe_unused *arg)
+{
+ pr_err("unwind: get_proc_name unsupported\n");
+ return -UNW_EINVAL;
+}
+#endif
+
+void *__libunwind_arch__create_addr_space_x86_64(void)
+{
+#ifdef HAVE_LIBUNWIND_X86_64_SUPPORT
+ static unw_accessors_t accessors = {
+ .find_proc_info = find_proc_info,
+ .put_unwind_info = put_unwind_info,
+ .get_dyn_info_list_addr = get_dyn_info_list_addr,
+ .access_mem = access_mem,
+ .access_reg = access_reg,
+ .access_fpreg = access_fpreg,
+ .resume = resume,
+ .get_proc_name = get_proc_name,
+ };
+ unw_addr_space_t addr_space;
+
+ addr_space = unw_create_addr_space(&accessors, /*byte_order=*/0);
+ unw_set_caching_policy(addr_space, UNW_CACHE_GLOBAL);
+ return addr_space;
+#else
+ return NULL;
+#endif
+}
+
+#ifdef HAVE_LIBUNWIND_X86_64_SUPPORT
+extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
+ unw_word_t ip,
+ unw_dyn_info_t *di,
+ unw_proc_info_t *pi,
+ int need_unwind_info, void *arg);
+#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
+#endif
+
+int __libunwind_arch__dwarf_search_unwind_table_x86_64(void *as __maybe_unused,
+ uint64_t ip __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ void *pi __maybe_unused,
+ int need_unwind_info __maybe_unused,
+ void *arg __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_X86_64_SUPPORT
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_search_unwind_table(as, ip, &di, pi, need_unwind_info, arg);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+#if defined(HAVE_LIBUNWIND_X86_64_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_X86_64)
+extern int UNW_OBJ(dwarf_find_debug_frame) (int found, unw_dyn_info_t *di_debug,
+ unw_word_t ip,
+ unw_word_t segbase,
+ const char *obj_name, unw_word_t start,
+ unw_word_t end);
+#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)
+#endif
+
+int __libunwind_arch__dwarf_find_debug_frame_x86_64(int found __maybe_unused,
+ struct libarch_unwind__dyn_info *_di __maybe_unused,
+ uint64_t ip __maybe_unused,
+ uint64_t segbase __maybe_unused,
+ const char *obj_name __maybe_unused,
+ uint64_t start __maybe_unused,
+ uint64_t end __maybe_unused)
+{
+#if defined(HAVE_LIBUNWIND_X86_64_SUPPORT) && !defined(NO_LIBUNWIND_DEBUG_FRAME_X86_64)
+ unw_dyn_info_t di = {
+ .format = UNW_INFO_FORMAT_REMOTE_TABLE,
+ .start_ip = _di->start_ip,
+ .end_ip = _di->end_ip,
+ .u = {
+ .rti = {
+ .segbase = _di->segbase,
+ .table_data = _di->table_data,
+ .table_len = _di->table_len,
+ },
+ },
+ };
+ int ret = dwarf_find_debug_frame(found, &di, ip, segbase, obj_name, start, end);
+
+ _di->start_ip = di.start_ip;
+ _di->end_ip = di.end_ip;
+ _di->segbase = di.u.rti.segbase;
+ _di->table_data = di.u.rti.table_data;
+ _di->table_len = di.u.rti.table_len;
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
+
+struct unwind_info *__libunwind_arch_unwind_info__new_x86_64(struct thread *thread __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ int max_stack __maybe_unused,
+ bool best_effort __maybe_unused,
+ uint64_t first_ip __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_X86_64_SUPPORT
+ struct arch_unwind_info {
+ struct unwind_info ui;
+ unw_cursor_t _cursor;
+ uint64_t _ips[];
+ };
+
+ struct maps *maps = thread__maps(thread);
+ void *addr_space = maps__addr_space(maps);
+ struct arch_unwind_info *ui;
+ int ret;
+
+ if (addr_space == NULL)
+ return NULL;
+
+ ui = zalloc(sizeof(*ui) + sizeof(ui->_ips[0]) * max_stack);
+ if (!ui)
+ return NULL;
+
+ ui->ui.machine = maps__machine(maps);
+ ui->ui.thread = thread;
+ ui->ui.sample = sample;
+ ui->ui.cursor = &ui->_cursor;
+ ui->ui.ips = &ui->_ips[0];
+ ui->ui.ips[0] = first_ip;
+ ui->ui.cur_ip = 1;
+ ui->ui.max_ips = max_stack;
+ ui->ui.unw_word_t_size = sizeof(unw_word_t);
+ ui->ui.e_machine = EM_X86_64;
+ ui->ui.best_effort = best_effort;
+
+ ret = unw_init_remote(&ui->_cursor, addr_space, &ui->ui);
+ if (ret) {
+ if (!best_effort)
+ pr_err("libunwind: %s\n", unw_strerror(ret));
+ free(ui);
+ return NULL;
+ }
+ return &ui->ui;
+#else
+ return NULL;
+#endif
+}
+
+int __libunwind_arch__unwind_step_x86_64(struct unwind_info *ui __maybe_unused)
+{
+#ifdef HAVE_LIBUNWIND_X86_64_SUPPORT
+ int ret;
+
+ if (ui->cur_ip >= ui->max_ips)
+ return 0;
+
+ ret = unw_step(ui->cursor);
+ if (ret > 0) {
+ uint64_t ip;
+
+ unw_get_reg(ui->cursor, UNW_REG_IP, &ip);
+
+ if (unw_is_signal_frame(ui->cursor) <= 0) {
+ /*
+ * Decrement the IP for any non-activation frames. This
+ * is required to properly find the srcline for caller
+ * frames. See also the documentation for
+ * dwfl_frame_pc(), which this code tries to replicate.
+ */
+ --ip;
+ }
+ ui->ips[ui->cur_ip++] = ip;
+ }
+ return ret;
+#else
+ return -EINVAL;
+#endif
+}
diff --git a/tools/perf/util/libunwind/arm64.c b/tools/perf/util/libunwind/arm64.c
deleted file mode 100644
index 15670a964495..000000000000
--- a/tools/perf/util/libunwind/arm64.c
+++ /dev/null
@@ -1,35 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * This file setups defines to compile arch specific binary from the
- * generic one.
- *
- * The function 'LIBUNWIND__ARCH_REG_ID' name is set according to arch
- * name and the definition of this function is included directly from
- * 'arch/arm64/util/unwind-libunwind.c', to make sure that this function
- * is defined no matter what arch the host is.
- *
- * Finally, the arch specific unwind methods are exported which will
- * be assigned to each arm64 thread.
- */
-
-#define REMOTE_UNWIND_LIBUNWIND
-
-#include "unwind.h"
-#include "libunwind-aarch64.h"
-#define perf_event_arm_regs perf_event_arm64_regs
-#include <../../../arch/arm64/include/uapi/asm/perf_regs.h>
-#undef perf_event_arm_regs
-#include "../../arch/arm64/util/unwind-libunwind.c"
-
-/* NO_LIBUNWIND_DEBUG_FRAME is a feature flag for local libunwind,
- * assign NO_LIBUNWIND_DEBUG_FRAME_AARCH64 to it for compiling arm64
- * unwind methods.
- */
-#undef NO_LIBUNWIND_DEBUG_FRAME
-#ifdef NO_LIBUNWIND_DEBUG_FRAME_AARCH64
-#define NO_LIBUNWIND_DEBUG_FRAME
-#endif
-#include "util/unwind-libunwind-local.c"
-
-struct unwind_libunwind_ops *
-arm64_unwind_libunwind_ops = &_unwind_libunwind_ops;
diff --git a/tools/perf/util/libunwind/x86_32.c b/tools/perf/util/libunwind/x86_32.c
deleted file mode 100644
index 1e9fb8bfec44..000000000000
--- a/tools/perf/util/libunwind/x86_32.c
+++ /dev/null
@@ -1,29 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * This file setups defines to compile arch specific binary from the
- * generic one.
- *
- * The function 'LIBUNWIND__ARCH_REG_ID' name is set according to arch
- * name and the definition of this function is included directly from
- * 'arch/x86/util/unwind-libunwind.c', to make sure that this function
- * is defined no matter what arch the host is.
- *
- * Finally, the arch specific unwind methods are exported which will
- * be assigned to each x86 thread.
- */
-
-#define REMOTE_UNWIND_LIBUNWIND
-
-#include "unwind.h"
-#include "libunwind-x86.h"
-
-/* Explicitly define NO_LIBUNWIND_DEBUG_FRAME, because non-ARM has no
- * dwarf_find_debug_frame() function.
- */
-#ifndef NO_LIBUNWIND_DEBUG_FRAME
-#define NO_LIBUNWIND_DEBUG_FRAME
-#endif
-#include "util/unwind-libunwind-local.c"
-
-struct unwind_libunwind_ops *
-x86_32_unwind_libunwind_ops = &_unwind_libunwind_ops;
diff --git a/tools/perf/util/maps.c b/tools/perf/util/maps.c
index 213288d6387d..76628019361b 100644
--- a/tools/perf/util/maps.c
+++ b/tools/perf/util/maps.c
@@ -198,16 +198,6 @@ void maps__set_addr_space(struct maps *maps, void *addr_space)
RC_CHK_ACCESS(maps)->addr_space = addr_space;
}

-const struct unwind_libunwind_ops *maps__unwind_libunwind_ops(const struct maps *maps)
-{
- return RC_CHK_ACCESS(maps)->unwind_libunwind_ops;
-}
-
-void maps__set_unwind_libunwind_ops(struct maps *maps, const struct unwind_libunwind_ops *ops)
-{
- RC_CHK_ACCESS(maps)->unwind_libunwind_ops = ops;
-}
-
uint16_t maps__e_machine(const struct maps *maps)
{
return RC_CHK_ACCESS(maps)->e_machine;
diff --git a/tools/perf/util/maps.h b/tools/perf/util/maps.h
index 6469f62c41a8..5b80b199685e 100644
--- a/tools/perf/util/maps.h
+++ b/tools/perf/util/maps.h
@@ -49,8 +49,6 @@ refcount_t *maps__refcnt(struct maps *maps); /* Test only. */
#ifdef HAVE_LIBUNWIND_SUPPORT
void *maps__addr_space(const struct maps *maps);
void maps__set_addr_space(struct maps *maps, void *addr_space);
-const struct unwind_libunwind_ops *maps__unwind_libunwind_ops(const struct maps *maps);
-void maps__set_unwind_libunwind_ops(struct maps *maps, const struct unwind_libunwind_ops *ops);
uint16_t maps__e_machine(const struct maps *maps);
void maps__set_e_machine(struct maps *maps, uint16_t e_machine);
#endif
diff --git a/tools/perf/util/unwind-libunwind-local.c b/tools/perf/util/unwind-libunwind-local.c
deleted file mode 100644
index d4b5a5fa6606..000000000000
--- a/tools/perf/util/unwind-libunwind-local.c
+++ /dev/null
@@ -1,819 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Post mortem Dwarf CFI based unwinding on top of regs and stack dumps.
- *
- * Lots of this code have been borrowed or heavily inspired from parts of
- * the libunwind 0.99 code which are (amongst other contributors I may have
- * forgotten):
- *
- * Copyright (C) 2002-2007 Hewlett-Packard Co
- * Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
- *
- * And the bugs have been added by:
- *
- * Copyright (C) 2010, Frederic Weisbecker <fweisbec@gmail.com>
- * Copyright (C) 2012, Jiri Olsa <jolsa@redhat.com>
- *
- */
-
-#include <elf.h>
-#include <errno.h>
-#include <gelf.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/mman.h>
-#include <linux/list.h>
-#ifndef REMOTE_UNWIND_LIBUNWIND
-#include <libunwind.h>
-#include <libunwind-ptrace.h>
-#endif
-#include "callchain.h"
-#include "thread.h"
-#include "session.h"
-#include "perf_regs.h"
-#include "unwind.h"
-#include "map.h"
-#include "symbol.h"
-#include "debug.h"
-#include "asm/bug.h"
-#include "dso.h"
-#include "libunwind-arch/libunwind-arch.h"
-
-extern int
-UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
- unw_word_t ip,
- unw_dyn_info_t *di,
- unw_proc_info_t *pi,
- int need_unwind_info, void *arg);
-
-#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
-
-extern int
-UNW_OBJ(dwarf_find_debug_frame) (int found, unw_dyn_info_t *di_debug,
- unw_word_t ip,
- unw_word_t segbase,
- const char *obj_name, unw_word_t start,
- unw_word_t end);
-
-#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)
-
-#define DW_EH_PE_FORMAT_MASK 0x0f /* format of the encoded value */
-#define DW_EH_PE_APPL_MASK 0x70 /* how the value is to be applied */
-
-/* Pointer-encoding formats: */
-#define DW_EH_PE_omit 0xff
-#define DW_EH_PE_ptr 0x00 /* pointer-sized unsigned value */
-#define DW_EH_PE_udata4 0x03 /* unsigned 32-bit value */
-#define DW_EH_PE_udata8 0x04 /* unsigned 64-bit value */
-#define DW_EH_PE_sdata4 0x0b /* signed 32-bit value */
-#define DW_EH_PE_sdata8 0x0c /* signed 64-bit value */
-
-/* Pointer-encoding application: */
-#define DW_EH_PE_absptr 0x00 /* absolute value */
-#define DW_EH_PE_pcrel 0x10 /* rel. to addr. of encoded value */
-
-/*
- * The following are not documented by LSB v1.3, yet they are used by
- * GCC, presumably they aren't documented by LSB since they aren't
- * used on Linux:
- */
-#define DW_EH_PE_funcrel 0x40 /* start-of-procedure-relative */
-#define DW_EH_PE_aligned 0x50 /* aligned pointer */
-
-/* Flags intentionally not handled, since they're not needed:
- * #define DW_EH_PE_indirect 0x80
- * #define DW_EH_PE_uleb128 0x01
- * #define DW_EH_PE_udata2 0x02
- * #define DW_EH_PE_sleb128 0x09
- * #define DW_EH_PE_sdata2 0x0a
- * #define DW_EH_PE_textrel 0x20
- * #define DW_EH_PE_datarel 0x30
- */
-
-struct unwind_info {
- struct perf_sample *sample;
- struct machine *machine;
- struct thread *thread;
- uint16_t e_machine;
- bool best_effort;
-};
-
-#define dw_read(ptr, type, end) ({ \
- type *__p = (type *) ptr; \
- type __v; \
- if ((__p + 1) > (type *) end) \
- return -EINVAL; \
- __v = *__p++; \
- ptr = (typeof(ptr)) __p; \
- __v; \
- })
-
-static int __dw_read_encoded_value(u8 **p, u8 *end, u64 *val,
- u8 encoding)
-{
- u8 *cur = *p;
- *val = 0;
-
- switch (encoding) {
- case DW_EH_PE_omit:
- *val = 0;
- goto out;
- case DW_EH_PE_ptr:
- *val = dw_read(cur, unsigned long, end);
- goto out;
- default:
- break;
- }
-
- switch (encoding & DW_EH_PE_APPL_MASK) {
- case DW_EH_PE_absptr:
- break;
- case DW_EH_PE_pcrel:
- *val = (unsigned long) cur;
- break;
- default:
- return -EINVAL;
- }
-
- if ((encoding & 0x07) == 0x00)
- encoding |= DW_EH_PE_udata4;
-
- switch (encoding & DW_EH_PE_FORMAT_MASK) {
- case DW_EH_PE_sdata4:
- *val += dw_read(cur, s32, end);
- break;
- case DW_EH_PE_udata4:
- *val += dw_read(cur, u32, end);
- break;
- case DW_EH_PE_sdata8:
- *val += dw_read(cur, s64, end);
- break;
- case DW_EH_PE_udata8:
- *val += dw_read(cur, u64, end);
- break;
- default:
- return -EINVAL;
- }
-
- out:
- *p = cur;
- return 0;
-}
-
-#define dw_read_encoded_value(ptr, end, enc) ({ \
- u64 __v; \
- if (__dw_read_encoded_value(&ptr, end, &__v, enc)) { \
- return -EINVAL; \
- } \
- __v; \
- })
-
-static int elf_section_address_and_offset(int fd, const char *name, u64 *address, u64 *offset)
-{
- Elf *elf;
- GElf_Ehdr ehdr;
- GElf_Shdr shdr;
- int ret = -1;
-
- elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
- if (elf == NULL)
- return -1;
-
- if (gelf_getehdr(elf, &ehdr) == NULL)
- goto out_err;
-
- if (!elf_section_by_name(elf, &ehdr, &shdr, name, NULL))
- goto out_err;
-
- *address = shdr.sh_addr;
- *offset = shdr.sh_offset;
- ret = 0;
-out_err:
- elf_end(elf);
- return ret;
-}
-
-#ifndef NO_LIBUNWIND_DEBUG_FRAME
-static u64 elf_section_offset(int fd, const char *name)
-{
- u64 address, offset = 0;
-
- if (elf_section_address_and_offset(fd, name, &address, &offset))
- return 0;
-
- return offset;
-}
-#endif
-
-static u64 elf_base_address(int fd)
-{
- Elf *elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
- GElf_Phdr phdr;
- u64 retval = 0;
- size_t i, phdrnum = 0;
-
- if (elf == NULL)
- return 0;
- (void)elf_getphdrnum(elf, &phdrnum);
- /* PT_LOAD segments are sorted by p_vaddr, so the first has the minimum p_vaddr. */
- for (i = 0; i < phdrnum; i++) {
- if (gelf_getphdr(elf, i, &phdr) && phdr.p_type == PT_LOAD) {
- retval = phdr.p_vaddr & -getpagesize();
- break;
- }
- }
-
- elf_end(elf);
- return retval;
-}
-
-#ifndef NO_LIBUNWIND_DEBUG_FRAME
-static int elf_is_exec(int fd, const char *name)
-{
- Elf *elf;
- GElf_Ehdr ehdr;
- int retval = 0;
-
- elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
- if (elf == NULL)
- return 0;
- if (gelf_getehdr(elf, &ehdr) == NULL)
- goto out;
-
- retval = (ehdr.e_type == ET_EXEC);
-
-out:
- elf_end(elf);
- pr_debug("unwind: elf_is_exec(%s): %d\n", name, retval);
- return retval;
-}
-#endif
-
-struct table_entry {
- u32 start_ip_offset;
- u32 fde_offset;
-};
-
-struct eh_frame_hdr {
- unsigned char version;
- unsigned char eh_frame_ptr_enc;
- unsigned char fde_count_enc;
- unsigned char table_enc;
-
- /*
- * The rest of the header is variable-length and consists of the
- * following members:
- *
- * encoded_t eh_frame_ptr;
- * encoded_t fde_count;
- */
-
- /* A single encoded pointer should not be more than 8 bytes. */
- u64 enc[2];
-
- /*
- * struct {
- * encoded_t start_ip;
- * encoded_t fde_addr;
- * } binary_search_table[fde_count];
- */
- char data[];
-} __packed;
-
-static int unwind_spec_ehframe(struct dso *dso, struct machine *machine,
- u64 offset, u64 *table_data_offset, u64 *fde_count)
-{
- struct eh_frame_hdr hdr;
- u8 *enc = (u8 *) &hdr.enc;
- u8 *end = (u8 *) &hdr.data;
- ssize_t r;
-
- r = dso__data_read_offset(dso, machine, offset,
- (u8 *) &hdr, sizeof(hdr));
- if (r != sizeof(hdr))
- return -EINVAL;
-
- /* We dont need eh_frame_ptr, just skip it. */
- dw_read_encoded_value(enc, end, hdr.eh_frame_ptr_enc);
-
- *fde_count = dw_read_encoded_value(enc, end, hdr.fde_count_enc);
- *table_data_offset = enc - (u8 *) &hdr;
- return 0;
-}
-
-struct read_unwind_spec_eh_frame_maps_cb_args {
- struct dso *dso;
- u64 base_addr;
-};
-
-static int read_unwind_spec_eh_frame_maps_cb(struct map *map, void *data)
-{
-
- struct read_unwind_spec_eh_frame_maps_cb_args *args = data;
-
- if (map__dso(map) == args->dso && map__start(map) - map__pgoff(map) < args->base_addr)
- args->base_addr = map__start(map) - map__pgoff(map);
-
- return 0;
-}
-
-
-static int read_unwind_spec_eh_frame(struct dso *dso, struct unwind_info *ui,
- u64 *table_data, u64 *segbase,
- u64 *fde_count)
-{
- struct read_unwind_spec_eh_frame_maps_cb_args args = {
- .dso = dso,
- .base_addr = UINT64_MAX,
- };
- int ret, fd;
-
- if (dso__data(dso)->eh_frame_hdr_offset == 0) {
- if (!dso__data_get_fd(dso, ui->machine, &fd))
- return -EINVAL;
-
- /* Check the .eh_frame section for unwinding info */
- ret = elf_section_address_and_offset(fd, ".eh_frame_hdr",
- &dso__data(dso)->eh_frame_hdr_addr,
- &dso__data(dso)->eh_frame_hdr_offset);
- dso__data(dso)->elf_base_addr = elf_base_address(fd);
- dso__data_put_fd(dso);
- if (ret || dso__data(dso)->eh_frame_hdr_offset == 0)
- return -EINVAL;
- }
-
- maps__for_each_map(thread__maps(ui->thread), read_unwind_spec_eh_frame_maps_cb, &args);
-
- args.base_addr -= dso__data(dso)->elf_base_addr;
- /* Address of .eh_frame_hdr */
- *segbase = args.base_addr + dso__data(dso)->eh_frame_hdr_addr;
- ret = unwind_spec_ehframe(dso, ui->machine, dso__data(dso)->eh_frame_hdr_offset,
- table_data, fde_count);
- if (ret)
- return ret;
- /* binary_search_table offset plus .eh_frame_hdr address */
- *table_data += *segbase;
- return 0;
-}
-
-#ifndef NO_LIBUNWIND_DEBUG_FRAME
-static int read_unwind_spec_debug_frame(struct dso *dso,
- struct machine *machine, u64 *offset)
-{
- int fd;
- u64 ofs = dso__data(dso)->debug_frame_offset;
-
- /* debug_frame can reside in:
- * - dso
- * - debug pointed by symsrc_filename
- * - gnu_debuglink, which doesn't necessary
- * has to be pointed by symsrc_filename
- */
- if (ofs == 0) {
- if (dso__data_get_fd(dso, machine, &fd)) {
- ofs = elf_section_offset(fd, ".debug_frame");
- dso__data_put_fd(dso);
- }
-
- if (ofs <= 0) {
- fd = open(dso__symsrc_filename(dso), O_RDONLY);
- if (fd >= 0) {
- ofs = elf_section_offset(fd, ".debug_frame");
- close(fd);
- }
- }
-
- if (ofs <= 0) {
- char *debuglink = malloc(PATH_MAX);
- int ret = 0;
-
- if (debuglink == NULL) {
- pr_err("unwind: Can't read unwind spec debug frame.\n");
- return -ENOMEM;
- }
-
- ret = dso__read_binary_type_filename(
- dso, DSO_BINARY_TYPE__DEBUGLINK,
- machine->root_dir, debuglink, PATH_MAX);
- if (!ret) {
- fd = open(debuglink, O_RDONLY);
- if (fd >= 0) {
- ofs = elf_section_offset(fd,
- ".debug_frame");
- close(fd);
- }
- }
- if (ofs > 0) {
- if (dso__symsrc_filename(dso) != NULL) {
- pr_warning(
- "%s: overwrite symsrc(%s,%s)\n",
- __func__,
- dso__symsrc_filename(dso),
- debuglink);
- dso__free_symsrc_filename(dso);
- }
- dso__set_symsrc_filename(dso, debuglink);
- } else {
- free(debuglink);
- }
- }
-
- dso__data(dso)->debug_frame_offset = ofs;
- }
-
- *offset = ofs;
- if (*offset)
- return 0;
-
- return -EINVAL;
-}
-#endif
-
-static struct map *find_map(unw_word_t ip, struct unwind_info *ui)
-{
- struct addr_location al;
- struct map *ret;
-
- addr_location__init(&al);
- thread__find_map(ui->thread, PERF_RECORD_MISC_USER, ip, &al);
- ret = map__get(al.map);
- addr_location__exit(&al);
- return ret;
-}
-
-static int
-find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
- int need_unwind_info, void *arg)
-{
- struct unwind_info *ui = arg;
- struct map *map;
- struct dso *dso;
- unw_dyn_info_t di;
- u64 table_data, segbase, fde_count;
- int ret = -EINVAL;
-
- map = find_map(ip, ui);
- if (!map)
- return -EINVAL;
-
- dso = map__dso(map);
- if (!dso) {
- map__put(map);
- return -EINVAL;
- }
-
- pr_debug("unwind: find_proc_info dso %s\n", dso__name(dso));
-
- /* Check the .eh_frame section for unwinding info */
- if (!read_unwind_spec_eh_frame(dso, ui, &table_data, &segbase, &fde_count)) {
- memset(&di, 0, sizeof(di));
- di.format = UNW_INFO_FORMAT_REMOTE_TABLE;
- di.start_ip = map__start(map);
- di.end_ip = map__end(map);
- di.u.rti.segbase = segbase;
- di.u.rti.table_data = table_data;
- di.u.rti.table_len = fde_count * sizeof(struct table_entry)
- / sizeof(unw_word_t);
- ret = dwarf_search_unwind_table(as, ip, &di, pi,
- need_unwind_info, arg);
- }
-
-#ifndef NO_LIBUNWIND_DEBUG_FRAME
- /* Check the .debug_frame section for unwinding info */
- if (ret < 0 &&
- !read_unwind_spec_debug_frame(dso, ui->machine, &segbase)) {
- int fd;
- u64 start = map__start(map);
- unw_word_t base = start;
- const char *symfile;
-
- if (dso__data_get_fd(dso, ui->machine, &fd)) {
- if (elf_is_exec(fd, dso__name(dso)))
- base = 0;
- dso__data_put_fd(dso);
- }
-
- symfile = dso__symsrc_filename(dso) ?: dso__name(dso);
-
- memset(&di, 0, sizeof(di));
- if (dwarf_find_debug_frame(0, &di, ip, base, symfile, start, map__end(map)))
- ret = dwarf_search_unwind_table(as, ip, &di, pi,
- need_unwind_info, arg);
- }
-#endif
- map__put(map);
- return ret;
-}
-
-static int access_fpreg(unw_addr_space_t __maybe_unused as,
- unw_regnum_t __maybe_unused num,
- unw_fpreg_t __maybe_unused *val,
- int __maybe_unused __write,
- void __maybe_unused *arg)
-{
- pr_err("unwind: access_fpreg unsupported\n");
- return -UNW_EINVAL;
-}
-
-static int get_dyn_info_list_addr(unw_addr_space_t __maybe_unused as,
- unw_word_t __maybe_unused *dil_addr,
- void __maybe_unused *arg)
-{
- return -UNW_ENOINFO;
-}
-
-static int resume(unw_addr_space_t __maybe_unused as,
- unw_cursor_t __maybe_unused *cu,
- void __maybe_unused *arg)
-{
- pr_err("unwind: resume unsupported\n");
- return -UNW_EINVAL;
-}
-
-static int
-get_proc_name(unw_addr_space_t __maybe_unused as,
- unw_word_t __maybe_unused addr,
- char __maybe_unused *bufp, size_t __maybe_unused buf_len,
- unw_word_t __maybe_unused *offp, void __maybe_unused *arg)
-{
- pr_err("unwind: get_proc_name unsupported\n");
- return -UNW_EINVAL;
-}
-
-static int access_dso_mem(struct unwind_info *ui, unw_word_t addr,
- unw_word_t *data)
-{
- struct map *map;
- struct dso *dso;
- ssize_t size;
-
- map = find_map(addr, ui);
- if (!map) {
- pr_debug("unwind: no map for %lx\n", (unsigned long)addr);
- return -1;
- }
-
- dso = map__dso(map);
-
- if (!dso) {
- map__put(map);
- return -1;
- }
-
- size = dso__data_read_addr(dso, map, ui->machine,
- addr, (u8 *) data, sizeof(*data));
- map__put(map);
- return !(size == sizeof(*data));
-}
-
-static int access_mem(unw_addr_space_t __maybe_unused as,
- unw_word_t addr, unw_word_t *valp,
- int __write, void *arg)
-{
- struct unwind_info *ui = arg;
- struct stack_dump *stack = &ui->sample->user_stack;
- u64 start, end;
- int offset;
- int ret;
-
- /* Don't support write, probably not needed. */
- if (__write || !stack || !ui->sample->user_regs || !ui->sample->user_regs->regs) {
- *valp = 0;
- return 0;
- }
-
- ret = perf_reg_value(&start, perf_sample__user_regs(ui->sample),
- perf_arch_reg_sp(ui->e_machine));
- if (ret)
- return ret;
-
- end = start + stack->size;
-
- /* Check overflow. */
- if (addr + sizeof(unw_word_t) < addr)
- return -EINVAL;
-
- if (addr < start || addr + sizeof(unw_word_t) >= end) {
- ret = access_dso_mem(ui, addr, valp);
- if (ret) {
- pr_debug("unwind: access_mem %p not inside range"
- " 0x%" PRIx64 "-0x%" PRIx64 "\n",
- (void *) (uintptr_t) addr, start, end);
- *valp = 0;
- return ret;
- }
- return 0;
- }
-
- offset = addr - start;
- *valp = *(unw_word_t *)&stack->data[offset];
- pr_debug("unwind: access_mem addr %p val %lx, offset %d\n",
- (void *) (uintptr_t) addr, (unsigned long)*valp, offset);
- return 0;
-}
-
-static int access_reg(unw_addr_space_t __maybe_unused as,
- unw_regnum_t regnum, unw_word_t *valp,
- int __write, void *arg)
-{
- struct unwind_info *ui = arg;
- int id, ret;
- u64 val;
-
- /* Don't support write, I suspect we don't need it. */
- if (__write) {
- pr_err("unwind: access_reg w %d\n", regnum);
- return 0;
- }
-
- if (!ui->sample->user_regs || !ui->sample->user_regs->regs) {
- *valp = 0;
- return 0;
- }
-
- id = get_perf_regnum_for_unw_regnum(ui->e_machine, regnum);
- if (id < 0)
- return -EINVAL;
-
- ret = perf_reg_value(&val, perf_sample__user_regs(ui->sample), id);
- if (ret) {
- if (!ui->best_effort)
- pr_err("unwind: can't read reg %d\n", regnum);
- return ret;
- }
-
- *valp = (unw_word_t) val;
- pr_debug("unwind: reg %d, val %lx\n", regnum, (unsigned long)*valp);
- return 0;
-}
-
-static void put_unwind_info(unw_addr_space_t __maybe_unused as,
- unw_proc_info_t *pi __maybe_unused,
- void *arg __maybe_unused)
-{
- pr_debug("unwind: put_unwind_info called\n");
-}
-
-static int entry(u64 ip, struct thread *thread,
- unwind_entry_cb_t cb, void *arg)
-{
- struct unwind_entry e;
- struct addr_location al;
- int ret;
-
- addr_location__init(&al);
- e.ms.sym = thread__find_symbol(thread, PERF_RECORD_MISC_USER, ip, &al);
- e.ip = ip;
- e.ms.map = al.map;
- e.ms.thread = thread__get(al.thread);
-
- pr_debug("unwind: %s:ip = 0x%" PRIx64 " (0x%" PRIx64 ")\n",
- al.sym ? al.sym->name : "''",
- ip,
- al.map ? map__map_ip(al.map, ip) : (u64) 0);
-
- ret = cb(&e, arg);
- addr_location__exit(&al);
- return ret;
-}
-
-static void display_error(int err)
-{
- switch (err) {
- case UNW_EINVAL:
- pr_err("unwind: Only supports local.\n");
- break;
- case UNW_EUNSPEC:
- pr_err("unwind: Unspecified error.\n");
- break;
- case UNW_EBADREG:
- pr_err("unwind: Register unavailable.\n");
- break;
- default:
- break;
- }
-}
-
-static unw_accessors_t accessors = {
- .find_proc_info = find_proc_info,
- .put_unwind_info = put_unwind_info,
- .get_dyn_info_list_addr = get_dyn_info_list_addr,
- .access_mem = access_mem,
- .access_reg = access_reg,
- .access_fpreg = access_fpreg,
- .resume = resume,
- .get_proc_name = get_proc_name,
-};
-
-static int _unwind__prepare_access(struct maps *maps)
-{
- void *addr_space = unw_create_addr_space(&accessors, 0);
-
- maps__set_addr_space(maps, addr_space);
- if (!addr_space) {
- pr_err("unwind: Can't create unwind address space.\n");
- return -ENOMEM;
- }
-
- unw_set_caching_policy(addr_space, UNW_CACHE_GLOBAL);
- return 0;
-}
-
-static int get_entries(struct unwind_info *ui, unwind_entry_cb_t cb,
- void *arg, int max_stack)
-{
- u64 val;
- unw_word_t ips[max_stack];
- unw_addr_space_t addr_space;
- unw_cursor_t c;
- int ret, i = 0;
-
- ret = perf_reg_value(&val, perf_sample__user_regs(ui->sample),
- perf_arch_reg_ip(ui->e_machine));
- if (ret)
- return ret;
-
- ips[i++] = (unw_word_t) val;
-
- /*
- * If we need more than one entry, do the DWARF
- * unwind itself.
- */
- if (max_stack - 1 > 0) {
- WARN_ONCE(!ui->thread, "WARNING: ui->thread is NULL");
- addr_space = maps__addr_space(thread__maps(ui->thread));
-
- if (addr_space == NULL)
- return -1;
-
- ret = unw_init_remote(&c, addr_space, ui);
- if (ret && !ui->best_effort)
- display_error(ret);
-
- while (!ret && (unw_step(&c) > 0) && i < max_stack) {
- unw_get_reg(&c, UNW_REG_IP, &ips[i]);
-
- /*
- * Decrement the IP for any non-activation frames.
- * this is required to properly find the srcline
- * for caller frames.
- * See also the documentation for dwfl_frame_pc(),
- * which this code tries to replicate.
- */
- if (unw_is_signal_frame(&c) <= 0)
- --ips[i];
-
- ++i;
- }
-
- max_stack = i;
- }
-
- /*
- * Display what we got based on the order setup.
- */
- for (i = 0; i < max_stack && !ret; i++) {
- int j = i;
-
- if (callchain_param.order == ORDER_CALLER)
- j = max_stack - i - 1;
- ret = ips[j] ? entry(ips[j], ui->thread, cb, arg) : 0;
- }
-
- return ret;
-}
-
-static int _unwind__get_entries(unwind_entry_cb_t cb, void *arg,
- struct thread *thread,
- struct perf_sample *data, int max_stack,
- bool best_effort)
-{
- struct unwind_info ui = {
- .sample = data,
- .thread = thread,
- .machine = maps__machine(thread__maps(thread)),
- .e_machine = thread__e_machine(thread, /*machine=*/NULL, /*e_flags=*/NULL),
- .best_effort = best_effort
- };
-
- if (!data->user_regs || !data->user_regs->regs)
- return -EINVAL;
-
- if (max_stack <= 0)
- return -EINVAL;
-
- return get_entries(&ui, cb, arg, max_stack);
-}
-
-static struct unwind_libunwind_ops
-_unwind_libunwind_ops = {
- .prepare_access = _unwind__prepare_access,
- .get_entries = _unwind__get_entries,
-};
-
-#ifndef REMOTE_UNWIND_LIBUNWIND
-struct unwind_libunwind_ops *
-local_unwind_libunwind_ops = &_unwind_libunwind_ops;
-#endif
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c
index eaee7b78d87c..66e7b7a26aad 100644
--- a/tools/perf/util/unwind-libunwind.c
+++ b/tools/perf/util/unwind-libunwind.c
@@ -1,23 +1,557 @@
// SPDX-License-Identifier: GPL-2.0
-#include "unwind.h"
+#include "callchain.h"
+#include "debug.h"
#include "dso.h"
+#include "env.h"
#include "map.h"
-#include "thread.h"
+#include "perf_regs.h"
#include "session.h"
-#include "debug.h"
-#include "env.h"
-#include "callchain.h"
+#include "symbol.h"
+#include "thread.h"
+#include "unwind.h"
#include "libunwind-arch/libunwind-arch.h"
#include <dwarf-regs.h>
#include <elf.h>
+#include <fcntl.h>
+#include <gelf.h>
+#include <inttypes.h>
+
+#define DW_EH_PE_FORMAT_MASK 0x0f /* format of the encoded value */
+#define DW_EH_PE_APPL_MASK 0x70 /* how the value is to be applied */
+
+/* Pointer-encoding formats: */
+#define DW_EH_PE_omit 0xff
+#define DW_EH_PE_ptr 0x00 /* pointer-sized unsigned value */
+#define DW_EH_PE_udata4 0x03 /* unsigned 32-bit value */
+#define DW_EH_PE_udata8 0x04 /* unsigned 64-bit value */
+#define DW_EH_PE_sdata4 0x0b /* signed 32-bit value */
+#define DW_EH_PE_sdata8 0x0c /* signed 64-bit value */
+
+/* Pointer-encoding application: */
+#define DW_EH_PE_absptr 0x00 /* absolute value */
+#define DW_EH_PE_pcrel 0x10 /* rel. to addr. of encoded value */
+
+/*
+ * The following are not documented by LSB v1.3, yet they are used by
+ * GCC, presumably they aren't documented by LSB since they aren't
+ * used on Linux:
+ */
+#define DW_EH_PE_funcrel 0x40 /* start-of-procedure-relative */
+#define DW_EH_PE_aligned 0x50 /* aligned pointer */
+
+/* Flags intentionally not handled, since they're not needed:
+ * #define DW_EH_PE_indirect 0x80
+ * #define DW_EH_PE_uleb128 0x01
+ * #define DW_EH_PE_udata2 0x02
+ * #define DW_EH_PE_sleb128 0x09
+ * #define DW_EH_PE_sdata2 0x0a
+ * #define DW_EH_PE_textrel 0x20
+ * #define DW_EH_PE_datarel 0x30
+ */
+
+#define dw_read(ptr, type, end) ({ \
+ type *__p = (type *) ptr; \
+ type __v; \
+ if ((__p + 1) > (type *) end) \
+ return -EINVAL; \
+ __v = *__p++; \
+ ptr = (typeof(ptr)) __p; \
+ __v; \
+ })
+
+static int __dw_read_encoded_value(u8 **p, u8 *end, u64 *val,
+ u8 encoding)
+{
+ u8 *cur = *p;
+ *val = 0;
+
+ switch (encoding) {
+ case DW_EH_PE_omit:
+ *val = 0;
+ goto out;
+ case DW_EH_PE_ptr:
+ *val = dw_read(cur, unsigned long, end);
+ goto out;
+ default:
+ break;
+ }
+
+ switch (encoding & DW_EH_PE_APPL_MASK) {
+ case DW_EH_PE_absptr:
+ break;
+ case DW_EH_PE_pcrel:
+ *val = (unsigned long) cur;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if ((encoding & 0x07) == 0x00)
+ encoding |= DW_EH_PE_udata4;
+
+ switch (encoding & DW_EH_PE_FORMAT_MASK) {
+ case DW_EH_PE_sdata4:
+ *val += dw_read(cur, s32, end);
+ break;
+ case DW_EH_PE_udata4:
+ *val += dw_read(cur, u32, end);
+ break;
+ case DW_EH_PE_sdata8:
+ *val += dw_read(cur, s64, end);
+ break;
+ case DW_EH_PE_udata8:
+ *val += dw_read(cur, u64, end);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ out:
+ *p = cur;
+ return 0;
+}
+
+#define dw_read_encoded_value(ptr, end, enc) ({ \
+ u64 __v; \
+ if (__dw_read_encoded_value(&ptr, end, &__v, enc)) { \
+ return -EINVAL; \
+ } \
+ __v; \
+ })
+
+static u64 elf_base_address(int fd)
+{
+ Elf *elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
+ GElf_Phdr phdr;
+ u64 retval = 0;
+ size_t i, phdrnum = 0;
+
+ if (elf == NULL)
+ return 0;
+ (void)elf_getphdrnum(elf, &phdrnum);
+ /* PT_LOAD segments are sorted by p_vaddr, so the first has the minimum p_vaddr. */
+ for (i = 0; i < phdrnum; i++) {
+ if (gelf_getphdr(elf, i, &phdr) && phdr.p_type == PT_LOAD) {
+ retval = phdr.p_vaddr & -getpagesize();
+ break;
+ }
+ }
+
+ elf_end(elf);
+ return retval;
+}
+
+static int unwind_spec_ehframe(struct dso *dso, struct machine *machine,
+ u64 offset, u64 *table_data_offset, u64 *fde_count)
+{
+ struct eh_frame_hdr {
+ unsigned char version;
+ unsigned char eh_frame_ptr_enc;
+ unsigned char fde_count_enc;
+ unsigned char table_enc;
+
+ /*
+ * The rest of the header is variable-length and consists of the
+ * following members:
+ *
+ * encoded_t eh_frame_ptr;
+ * encoded_t fde_count;
+ */
+
+ /* A single encoded pointer should not be more than 8 bytes. */
+ u64 enc[2];
+
+ /*
+ * struct {
+ * encoded_t start_ip;
+ * encoded_t fde_addr;
+ * } binary_search_table[fde_count];
+ */
+ char data[];
+ } __packed hdr;
+ u8 *enc = (u8 *) &hdr.enc;
+ u8 *end = (u8 *) &hdr.data;
+ ssize_t r;
+
+ r = dso__data_read_offset(dso, machine, offset, (u8 *) &hdr, sizeof(hdr));
+ if (r != sizeof(hdr))
+ return -EINVAL;
+
+ /* We dont need eh_frame_ptr, just skip it. */
+ dw_read_encoded_value(enc, end, hdr.eh_frame_ptr_enc);
+
+ *fde_count = dw_read_encoded_value(enc, end, hdr.fde_count_enc);
+ *table_data_offset = enc - (u8 *) &hdr;
+ return 0;
+}
+
+struct read_unwind_spec_eh_frame_maps_cb_args {
+ struct dso *dso;
+ u64 base_addr;
+};
+
+static int read_unwind_spec_eh_frame_maps_cb(struct map *map, void *data)
+{
+
+ struct read_unwind_spec_eh_frame_maps_cb_args *args = data;
+
+ if (map__dso(map) == args->dso && map__start(map) - map__pgoff(map) < args->base_addr)
+ args->base_addr = map__start(map) - map__pgoff(map);
+
+ return 0;
+}
+
+static int elf_section_address_and_offset(int fd, const char *name, u64 *address, u64 *offset)
+{
+ Elf *elf;
+ GElf_Ehdr ehdr;
+ GElf_Shdr shdr;
+ int ret = -1;
+
+ elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
+ if (elf == NULL)
+ return -1;

-struct unwind_libunwind_ops __weak *local_unwind_libunwind_ops;
-struct unwind_libunwind_ops __weak *x86_32_unwind_libunwind_ops;
-struct unwind_libunwind_ops __weak *arm64_unwind_libunwind_ops;
+ if (gelf_getehdr(elf, &ehdr) == NULL)
+ goto out_err;
+
+ if (!elf_section_by_name(elf, &ehdr, &shdr, name, NULL))
+ goto out_err;
+
+ *address = shdr.sh_addr;
+ *offset = shdr.sh_offset;
+ ret = 0;
+out_err:
+ elf_end(elf);
+ return ret;
+}
+
+static int read_unwind_spec_eh_frame(struct dso *dso, struct unwind_info *ui,
+ u64 *table_data, u64 *segbase,
+ u64 *fde_count)
+{
+ struct read_unwind_spec_eh_frame_maps_cb_args args = {
+ .dso = dso,
+ .base_addr = UINT64_MAX,
+ };
+ int ret, fd;
+
+ if (dso__data(dso)->eh_frame_hdr_offset == 0) {
+ if (!dso__data_get_fd(dso, ui->machine, &fd))
+ return -EINVAL;
+
+ /* Check the .eh_frame section for unwinding info */
+ ret = elf_section_address_and_offset(fd, ".eh_frame_hdr",
+ &dso__data(dso)->eh_frame_hdr_addr,
+ &dso__data(dso)->eh_frame_hdr_offset);
+ dso__data(dso)->elf_base_addr = elf_base_address(fd);
+ dso__data_put_fd(dso);
+ if (ret || dso__data(dso)->eh_frame_hdr_offset == 0)
+ return -EINVAL;
+ }
+
+ maps__for_each_map(thread__maps(ui->thread), read_unwind_spec_eh_frame_maps_cb, &args);
+
+ args.base_addr -= dso__data(dso)->elf_base_addr;
+ /* Address of .eh_frame_hdr */
+ *segbase = args.base_addr + dso__data(dso)->eh_frame_hdr_addr;
+ ret = unwind_spec_ehframe(dso, ui->machine, dso__data(dso)->eh_frame_hdr_offset,
+ table_data, fde_count);
+ if (ret)
+ return ret;
+ /* binary_search_table offset plus .eh_frame_hdr address */
+ *table_data += *segbase;
+ return 0;
+}
+
+static u64 elf_section_offset(int fd, const char *name)
+{
+ u64 address, offset = 0;
+
+ if (elf_section_address_and_offset(fd, name, &address, &offset))
+ return 0;
+
+ return offset;
+}
+
+static int read_unwind_spec_debug_frame(struct dso *dso,
+ struct machine *machine, u64 *offset)
+{
+ int fd;
+ u64 ofs = dso__data(dso)->debug_frame_offset;
+
+ /* debug_frame can reside in:
+ * - dso
+ * - debug pointed by symsrc_filename
+ * - gnu_debuglink, which doesn't necessary
+ * has to be pointed by symsrc_filename
+ */
+ if (ofs == 0) {
+ if (dso__data_get_fd(dso, machine, &fd)) {
+ ofs = elf_section_offset(fd, ".debug_frame");
+ dso__data_put_fd(dso);
+ }
+
+ if (ofs <= 0) {
+ fd = open(dso__symsrc_filename(dso), O_RDONLY);
+ if (fd >= 0) {
+ ofs = elf_section_offset(fd, ".debug_frame");
+ close(fd);
+ }
+ }
+
+ if (ofs <= 0) {
+ char *debuglink = malloc(PATH_MAX);
+ int ret = 0;
+
+ if (debuglink == NULL) {
+ pr_err("unwind: Can't read unwind spec debug frame.\n");
+ return -ENOMEM;
+ }
+
+ ret = dso__read_binary_type_filename(
+ dso, DSO_BINARY_TYPE__DEBUGLINK,
+ machine->root_dir, debuglink, PATH_MAX);
+ if (!ret) {
+ fd = open(debuglink, O_RDONLY);
+ if (fd >= 0) {
+ ofs = elf_section_offset(fd,
+ ".debug_frame");
+ close(fd);
+ }
+ }
+ if (ofs > 0) {
+ if (dso__symsrc_filename(dso) != NULL) {
+ pr_warning(
+ "%s: overwrite symsrc(%s,%s)\n",
+ __func__,
+ dso__symsrc_filename(dso),
+ debuglink);
+ dso__free_symsrc_filename(dso);
+ }
+ dso__set_symsrc_filename(dso, debuglink);
+ } else {
+ free(debuglink);
+ }
+ }
+
+ dso__data(dso)->debug_frame_offset = ofs;
+ }
+
+ *offset = ofs;
+ if (*offset)
+ return 0;
+
+ return -EINVAL;
+}
+
+static struct map *find_map(uint64_t ip, struct unwind_info *ui)
+{
+ struct addr_location al;
+ struct map *ret;
+
+ addr_location__init(&al);
+ thread__find_map(ui->thread, PERF_RECORD_MISC_USER, ip, &al);
+ ret = map__get(al.map);
+ addr_location__exit(&al);
+ return ret;
+}
+
+static int elf_is_exec(int fd, const char *name)
+{
+ Elf *elf;
+ GElf_Ehdr ehdr;
+ int retval = 0;
+
+ elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
+ if (elf == NULL)
+ return 0;
+ if (gelf_getehdr(elf, &ehdr) == NULL)
+ goto out;
+
+ retval = (ehdr.e_type == ET_EXEC);
+
+out:
+ elf_end(elf);
+ pr_debug3("unwind: elf_is_exec(%s): %d\n", name, retval);
+ return retval;
+}
+
+int __libunwind__find_proc_info(void *as, uint64_t ip, void *pi, int need_unwind_info, void *arg)
+{
+ struct unwind_info *ui = arg;
+ struct map *map;
+ struct dso *dso;
+ u64 table_data, segbase, fde_count;
+ int ret = -EINVAL;
+
+ map = find_map(ip, ui);
+ if (!map)
+ return -EINVAL;
+
+ dso = map__dso(map);
+ if (!dso) {
+ map__put(map);
+ return -EINVAL;
+ }
+
+ pr_debug3("unwind: find_proc_info dso %s\n", dso__name(dso));
+
+ /* Check the .eh_frame section for unwinding info */
+ if (!read_unwind_spec_eh_frame(dso, ui, &table_data, &segbase, &fde_count)) {
+ struct table_entry {
+ u32 start_ip_offset;
+ u32 fde_offset;
+ };
+ struct libarch_unwind__dyn_info di = {
+ .start_ip = map__start(map),
+ .end_ip = map__end(map),
+ .segbase = segbase,
+ .table_data = table_data,
+ .table_len = fde_count * sizeof(struct table_entry) / ui->unw_word_t_size,
+ };
+
+ ret = libunwind_arch__dwarf_search_unwind_table(ui->e_machine, as, ip, &di, pi,
+ need_unwind_info, arg);
+ }
+
+ /* Check the .debug_frame section for unwinding info */
+ if (ret < 0 && !read_unwind_spec_debug_frame(dso, ui->machine, &segbase)) {
+ int fd;
+ u64 start = map__start(map);
+ u64 base = start;
+ const char *symfile;
+ struct libarch_unwind__dyn_info di = {};
+
+ if (dso__data_get_fd(dso, ui->machine, &fd)) {
+ if (elf_is_exec(fd, dso__name(dso)))
+ base = 0;
+ dso__data_put_fd(dso);
+ }
+
+ symfile = dso__symsrc_filename(dso) ?: dso__name(dso);
+
+ if (libunwind_arch__dwarf_find_debug_frame(ui->e_machine, /*found=*/0, &di, ip,
+ base, symfile, start, map__end(map))) {
+ ret = libunwind_arch__dwarf_search_unwind_table(ui->e_machine, as, ip, &di, pi,
+ need_unwind_info, arg);
+ }
+ }
+ map__put(map);
+ return ret;
+}
+
+static int access_dso_mem(struct unwind_info *ui, uint64_t addr, void *data_word)
+{
+ struct map *map;
+ struct dso *dso;
+ ssize_t size;
+
+ map = find_map(addr, ui);
+ if (!map) {
+ pr_debug("unwind: no map for %lx\n", (unsigned long)addr);
+ return -1;
+ }
+
+ dso = map__dso(map);
+
+ if (!dso) {
+ map__put(map);
+ return -1;
+ }
+
+ size = dso__data_read_addr(dso, map, ui->machine,
+ addr,
+ (u8 *) data_word,
+ ui->unw_word_t_size);
+ map__put(map);
+ return !((size_t)size == ui->unw_word_t_size);
+}
+
+int __libunwind__access_mem(void *as __maybe_unused, uint64_t addr, void *valp_word,
+ int __write, void *arg)
+{
+ struct unwind_info *ui = arg;
+ struct stack_dump *stack = &ui->sample->user_stack;
+ u64 start, end;
+ int offset;
+ int ret;
+
+ /* Don't support write, probably not needed. */
+ if (__write || !stack || !ui->sample->user_regs || !ui->sample->user_regs->regs) {
+ uint64_t zero = 0;
+
+ memcpy(valp_word, &zero, ui->unw_word_t_size);
+ return 0;
+ }
+
+ ret = perf_reg_value(&start, perf_sample__user_regs(ui->sample),
+ perf_arch_reg_sp(ui->e_machine));
+ if (ret)
+ return ret;
+
+ end = start + stack->size;
+
+ /* Check overflow. */
+ if (addr + ui->unw_word_t_size < addr)
+ return -EINVAL;
+
+ if (addr < start || addr + ui->unw_word_t_size >= end) {
+ ret = access_dso_mem(ui, addr, valp_word);
+ if (ret) {
+ pr_debug3("unwind: access_mem %p not inside range"
+ " 0x%" PRIx64 "-0x%" PRIx64 "\n",
+ (void *) (uintptr_t) addr, start, end);
+ memset(valp_word, 0, ui->unw_word_t_size);
+ return ret;
+ }
+ return 0;
+ }
+
+ offset = addr - start;
+ memcpy(valp_word, &stack->data[offset], ui->unw_word_t_size);
+ pr_debug3("unwind: access_mem addr %p val %lx, offset %d\n",
+ (void *) (uintptr_t) addr, *((unsigned long *)valp_word), offset);
+ return 0;
+}
+
+int __libunwind__access_reg(void *as __maybe_unused, int regnum, void *valp_word, int __write,
+ void *arg)
+{
+ struct unwind_info *ui = arg;
+ int id, ret;
+ u64 val;
+
+ /* Don't support write, I suspect we don't need it. */
+ if (__write) {
+ pr_err("unwind: access_reg w %d\n", regnum);
+ return 0;
+ }
+
+ if (!ui->sample->user_regs || !ui->sample->user_regs->regs) {
+ memset(valp_word, 0, ui->unw_word_t_size);
+ return 0;
+ }
+
+ id = get_perf_regnum_for_unw_regnum(ui->e_machine, regnum);
+ if (id < 0)
+ return -EINVAL;
+
+ ret = perf_reg_value(&val, perf_sample__user_regs(ui->sample), id);
+ if (ret) {
+ if (!ui->best_effort)
+ pr_err("unwind: can't read reg %d\n", regnum);
+ return ret;
+ }
+
+ memcpy(valp_word, &val, ui->unw_word_t_size);
+ pr_debug3("unwind: reg %d, val %lx\n", regnum, val);
+ return 0;
+}

int unwind__prepare_access(struct maps *maps, uint16_t e_machine)
{
- struct unwind_libunwind_ops *ops = local_unwind_libunwind_ops;
+ void *addr_space;

if (!dwarf_callchain_users)
return 0;
@@ -27,25 +561,16 @@ int unwind__prepare_access(struct maps *maps, uint16_t e_machine)
return 0;
}

- if (e_machine != EM_HOST) {
- /* If not live/local mode. */
- switch (e_machine) {
- case EM_386:
- ops = x86_32_unwind_libunwind_ops;
- break;
- case EM_AARCH64:
- ops = arm64_unwind_libunwind_ops;
- break;
- default:
- pr_warning_once("unwind: ELF machine type %d is not supported\n",
- e_machine);
- return 0;
- }
- }
- maps__set_unwind_libunwind_ops(maps, ops);
maps__set_e_machine(maps, e_machine);
+ addr_space = libunwind_arch__create_addr_space(e_machine);
+
+ maps__set_addr_space(maps, addr_space);
+ if (!addr_space) {
+ pr_err("unwind: Can't create unwind address space.\n");
+ return -ENOMEM;
+ }

- return maps__unwind_libunwind_ops(maps)->prepare_access(maps);
+ return 0;
}

void unwind__flush_access(struct maps *maps)
@@ -58,14 +583,81 @@ void unwind__finish_access(struct maps *maps)
libunwind_arch__finish_access(maps);
}

+static int entry(uint64_t ip, struct thread *thread, unwind_entry_cb_t cb, void *arg)
+{
+ struct unwind_entry e;
+ struct addr_location al;
+ int ret;
+
+ addr_location__init(&al);
+ e.ms.sym = thread__find_symbol(thread, PERF_RECORD_MISC_USER, ip, &al);
+ e.ip = ip;
+ e.ms.map = al.map;
+ e.ms.thread = thread__get(al.thread);
+
+ pr_debug("unwind: %s:ip = 0x%" PRIx64 " (0x%" PRIx64 ")\n",
+ al.sym ? al.sym->name : "''",
+ ip,
+ al.map ? map__map_ip(al.map, ip) : (u64) 0);
+
+ ret = cb(&e, arg);
+ addr_location__exit(&al);
+ return ret;
+}
+
int libunwind__get_entries(unwind_entry_cb_t cb, void *arg,
struct thread *thread,
- struct perf_sample *data, int max_stack,
+ struct perf_sample *sample, int max_stack,
bool best_effort)
{
- const struct unwind_libunwind_ops *ops = maps__unwind_libunwind_ops(thread__maps(thread));
+ struct unwind_info *ui;
+ uint64_t first_ip;
+ int ret, i = 0;
+ uint16_t e_machine;

- if (ops)
- return ops->get_entries(cb, arg, thread, data, max_stack, best_effort);
- return 0;
+ if (!sample->user_regs || !sample->user_regs->regs)
+ return -EINVAL;
+
+ if (max_stack <= 0)
+ return -EINVAL;
+
+ if (!thread) {
+ pr_warning_once("WARNING: thread is NULL");
+ return -EINVAL;
+ }
+
+ e_machine = thread__e_machine(thread, /*machine=*/NULL, /*e_flags=*/NULL);
+ ret = perf_reg_value(&first_ip, perf_sample__user_regs(sample),
+ perf_arch_reg_ip(e_machine));
+ if (ret)
+ return ret;
+
+ if (max_stack == 1) {
+ /* Special case for a single entry. */
+ return entry(first_ip, thread, cb, arg);
+ }
+
+ ui = libunwind_arch_unwind_info__new(thread, sample, max_stack, best_effort, e_machine, first_ip);
+ if (!ui)
+ return -1;
+
+ do {
+ ret = libunwind_arch__unwind_step(ui);
+ if (ret < 0)
+ goto out;
+
+ } while (ret);
+
+ /*
+ * Display what we got based on the order setup.
+ */
+ for (i = 0; i < ui->cur_ip; i++) {
+ int j = callchain_param.order == ORDER_CALLEE ? i : ui->cur_ip - i - 1;
+
+ if (ui->ips[j])
+ ret = entry(ui->ips[j], thread, cb, arg);
+ }
+out:
+ libunwind_arch_unwind_info__delete(ui);
+ return ret;
}
diff --git a/tools/perf/util/unwind.h b/tools/perf/util/unwind.h
index ad610c5a241c..47ce12408c66 100644
--- a/tools/perf/util/unwind.h
+++ b/tools/perf/util/unwind.h
@@ -19,13 +19,6 @@ struct unwind_entry {

typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);

-struct unwind_libunwind_ops {
- int (*prepare_access)(struct maps *maps);
- int (*get_entries)(unwind_entry_cb_t cb, void *arg,
- struct thread *thread,
- struct perf_sample *data, int max_stack, bool best_effort);
-};
-
int unwind__configure(const char *var, const char *value, void *cb);
int unwind__option(const struct option *opt, const char *arg, int unset);

--
2.53.0.1213.gd9a14994de-goog