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perf capstone: Determine architecture from e_machine

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Avoid the use of arch string that is imprecise and use the
e_machine. Do more e_machine to capstone machine translations adding
MIPS and RISCV. Remove unnecessary maybe_unused annotations.

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Honglei Wang <jameshongleiwang@126.com>
Cc: Jan Polensky <japo@linux.ibm.com>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2026-06-02 08:25:01 -07:00 committed by Arnaldo Carvalho de Melo
parent f7c6e4b99d
commit 12c4737f55
1 changed files with 88 additions and 44 deletions
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132
tools/perf/util/capstone.c
View File

@ -1,7 +1,19 @@
// SPDX-License-Identifier: GPL-2.0
#include "capstone.h"
#include "annotate.h"
#include <errno.h>
#include <inttypes.h>
#include <string.h>
#include <dlfcn.h>
#include <elf.h>
#include <fcntl.h>
#include <linux/ctype.h>
#include <capstone/capstone.h>
#include "addr_location.h"
#include "annotate.h"
#include "debug.h"
#include "disasm.h"
#include "dso.h"
@ -11,13 +23,6 @@
#include "print_insn.h"
#include "symbol.h"
#include "thread.h"
#include <dlfcn.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <string.h>
#include <capstone/capstone.h>
#ifdef LIBCAPSTONE_DLOPEN
static void *perf_cs_dll_handle(void)
@ -137,37 +142,70 @@ static enum cs_err perf_cs_close(csh *handle)
#endif
}
static int capstone_init(struct machine *machine, csh *cs_handle, bool is64,
static bool e_machine_to_capstone(uint16_t e_machine, bool is64, bool is_big_endian,
enum cs_arch *arch, enum cs_mode *mode)
{
*mode = is_big_endian ? CS_MODE_BIG_ENDIAN : CS_MODE_LITTLE_ENDIAN;
switch (e_machine) {
case EM_X86_64:
case EM_386:
*arch = CS_ARCH_X86;
*mode |= is64 ? CS_MODE_64 : CS_MODE_32;
return true;
case EM_AARCH64:
*arch = CS_ARCH_ARM64;
*mode |= CS_MODE_ARM;
return true;
case EM_ARM:
*arch = CS_ARCH_ARM;
*mode |= CS_MODE_ARM | CS_MODE_V8;
return true;
case EM_S390:
*arch = CS_ARCH_SYSZ;
return true;
case EM_MIPS:
*arch = CS_ARCH_MIPS;
*mode |= is64 ? CS_MODE_MIPS64 : CS_MODE_MIPS32;
return true;
case EM_PPC:
*arch = CS_ARCH_PPC;
return true;
case EM_PPC64:
*arch = CS_ARCH_PPC;
*mode |= CS_MODE_64;
return true;
case EM_SPARC:
*arch = CS_ARCH_SPARC;
return true;
case EM_SPARCV9:
*arch = CS_ARCH_SPARC;
*mode |= CS_MODE_V9;
return true;
case EM_RISCV:
*arch = CS_ARCH_RISCV;
*mode |= (is64 ? CS_MODE_RISCV64 : CS_MODE_RISCV32) | CS_MODE_RISCVC;
return true;
default:
return false;
}
}
static int capstone_init(uint16_t e_machine, csh *cs_handle, bool is64, bool is_big_endian,
bool disassembler_style)
{
enum cs_arch arch;
enum cs_mode mode;
if (machine__is(machine, "x86_64") && is64) {
arch = CS_ARCH_X86;
mode = CS_MODE_64;
} else if (machine__normalized_is(machine, "x86")) {
arch = CS_ARCH_X86;
mode = CS_MODE_32;
} else if (machine__normalized_is(machine, "arm64")) {
arch = CS_ARCH_ARM64;
mode = CS_MODE_ARM;
} else if (machine__normalized_is(machine, "arm")) {
arch = CS_ARCH_ARM;
mode = CS_MODE_ARM + CS_MODE_V8;
} else if (machine__normalized_is(machine, "s390")) {
arch = CS_ARCH_SYSZ;
mode = CS_MODE_BIG_ENDIAN;
} else {
if (!e_machine_to_capstone(e_machine, is64, is_big_endian, &arch, &mode))
return -1;
}
if (perf_cs_open(arch, mode, cs_handle) != CS_ERR_OK) {
pr_warning_once("cs_open failed\n");
return -1;
}
if (machine__normalized_is(machine, "x86")) {
if (arch == CS_ARCH_X86) {
/*
* In case of using capstone_init while symbol__disassemble
* setting CS_OPT_SYNTAX_ATT depends if disassembler_style opts
@ -211,29 +249,28 @@ static size_t print_insn_x86(struct thread *thread, u8 cpumode, struct cs_insn *
return printed;
}
ssize_t capstone__fprintf_insn_asm(struct machine *machine __maybe_unused,
struct thread *thread __maybe_unused,
u8 cpumode __maybe_unused, bool is64bit __maybe_unused,
const uint8_t *code __maybe_unused,
size_t code_size __maybe_unused,
uint64_t ip __maybe_unused, int *lenp __maybe_unused,
int print_opts __maybe_unused, FILE *fp __maybe_unused)
ssize_t capstone__fprintf_insn_asm(struct machine *machine, struct thread *thread, u8 cpumode,
bool is64bit, const uint8_t *code, size_t code_size, uint64_t ip,
int *lenp, int print_opts, FILE *fp)
{
size_t printed;
struct cs_insn *insn;
csh cs_handle;
size_t count;
bool is_big_endian = false;
uint16_t e_machine = thread__e_machine_endian(thread, machine,
/*e_flags=*/NULL, &is_big_endian);
int ret;
/* TODO: Try to initiate capstone only once but need a proper place. */
ret = capstone_init(machine, &cs_handle, is64bit, true);
ret = capstone_init(e_machine, &cs_handle, is64bit, is_big_endian,
/*disassembler_style=*/true);
if (ret < 0)
return ret;
count = perf_cs_disasm(cs_handle, code, code_size, ip, 1, &insn);
if (count > 0) {
if (machine__normalized_is(machine, "x86"))
if (e_machine == EM_X86_64 || e_machine == EM_386)
printed = print_insn_x86(thread, cpumode, &insn[0], print_opts, fp);
else
printed = fprintf(fp, "%s %s", insn[0].mnemonic, insn[0].op_str);
@ -322,9 +359,8 @@ static int find_file_offset(u64 start, u64 len, u64 pgoff, void *arg)
return 0;
}
int symbol__disassemble_capstone(const char *filename __maybe_unused,
struct symbol *sym __maybe_unused,
struct annotate_args *args __maybe_unused)
int symbol__disassemble_capstone(const char *filename, struct symbol *sym,
struct annotate_args *args)
{
struct annotation *notes = symbol__annotation(sym);
struct map *map = args->ms->map;
@ -344,6 +380,8 @@ int symbol__disassemble_capstone(const char *filename __maybe_unused,
char disasm_buf[512];
struct disasm_line *dl;
bool disassembler_style = false;
uint16_t e_machine;
bool is_big_endian = false;
if (args->options->objdump_path)
return -1;
@ -373,8 +411,10 @@ int symbol__disassemble_capstone(const char *filename __maybe_unused,
!strcmp(args->options->disassembler_style, "att"))
disassembler_style = true;
if (capstone_init(maps__machine(thread__maps(args->ms->thread)), &handle, is_64bit,
disassembler_style) < 0)
e_machine = thread__e_machine_endian(args->ms->thread,
/*machine=*/NULL,
/*e_flags=*/NULL, &is_big_endian);
if (capstone_init(e_machine, &handle, is_64bit, is_big_endian, disassembler_style) < 0)
goto err;
needs_cs_close = true;
@ -466,6 +506,8 @@ int symbol__disassemble_capstone_powerpc(const char *filename __maybe_unused,
struct disasm_line *dl;
u32 *line;
bool disassembler_style = false;
uint16_t e_machine;
bool is_big_endian = false;
if (args->options->objdump_path)
return -1;
@ -484,8 +526,10 @@ int symbol__disassemble_capstone_powerpc(const char *filename __maybe_unused,
!strcmp(args->options->disassembler_style, "att"))
disassembler_style = true;
if (capstone_init(maps__machine(thread__maps(args->ms->thread)), &handle, is_64bit,
disassembler_style) < 0)
e_machine = thread__e_machine_endian(args->ms->thread,
/*machine=*/NULL,
/*e_flags=*/NULL, &is_big_endian);
if (capstone_init(e_machine, &handle, is_64bit, is_big_endian, disassembler_style) < 0)
goto err;
needs_cs_close = true;