diff options
Diffstat (limited to 'tools/perf/util/print_insn.c')
| -rw-r--r-- | tools/perf/util/print_insn.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/tools/perf/util/print_insn.c b/tools/perf/util/print_insn.c new file mode 100644 index 0000000000..459e0e93d7 --- /dev/null +++ b/tools/perf/util/print_insn.c @@ -0,0 +1,135 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Instruction binary disassembler based on capstone. + * + * Author(s): Changbin Du <changbin.du@huawei.com> + */ +#include <string.h> +#include <stdbool.h> +#include "debug.h" +#include "sample.h" +#include "symbol.h" +#include "machine.h" +#include "thread.h" +#include "print_insn.h" + +size_t sample__fprintf_insn_raw(struct perf_sample *sample, FILE *fp) +{ + int printed = 0; + + for (int i = 0; i < sample->insn_len; i++) { + printed += fprintf(fp, "%02x", (unsigned char)sample->insn[i]); + if (sample->insn_len - i > 1) + printed += fprintf(fp, " "); + } + return printed; +} + +#ifdef HAVE_LIBCAPSTONE_SUPPORT +#include <capstone/capstone.h> + +static int capstone_init(struct machine *machine, csh *cs_handle) +{ + cs_arch arch; + cs_mode mode; + + if (machine__is(machine, "x86_64")) { + 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 { + return -1; + } + + if (cs_open(arch, mode, cs_handle) != CS_ERR_OK) { + pr_warning_once("cs_open failed\n"); + return -1; + } + + if (machine__normalized_is(machine, "x86")) { + cs_option(*cs_handle, CS_OPT_SYNTAX, CS_OPT_SYNTAX_ATT); + /* + * Resolving address operands to symbols is implemented + * on x86 by investigating instruction details. + */ + cs_option(*cs_handle, CS_OPT_DETAIL, CS_OPT_ON); + } + + return 0; +} + +static size_t print_insn_x86(struct perf_sample *sample, struct thread *thread, + cs_insn *insn, FILE *fp) +{ + struct addr_location al; + size_t printed = 0; + + if (insn->detail && insn->detail->x86.op_count == 1) { + cs_x86_op *op = &insn->detail->x86.operands[0]; + + addr_location__init(&al); + if (op->type == X86_OP_IMM && + thread__find_symbol(thread, sample->cpumode, op->imm, &al)) { + printed += fprintf(fp, "%s ", insn[0].mnemonic); + printed += symbol__fprintf_symname_offs(al.sym, &al, fp); + addr_location__exit(&al); + return printed; + } + addr_location__exit(&al); + } + + printed += fprintf(fp, "%s %s", insn[0].mnemonic, insn[0].op_str); + return printed; +} + +size_t sample__fprintf_insn_asm(struct perf_sample *sample, struct thread *thread, + struct machine *machine, FILE *fp) +{ + csh cs_handle; + cs_insn *insn; + size_t count; + size_t printed = 0; + int ret; + + /* TODO: Try to initiate capstone only once but need a proper place. */ + ret = capstone_init(machine, &cs_handle); + if (ret < 0) { + /* fallback */ + return sample__fprintf_insn_raw(sample, fp); + } + + count = cs_disasm(cs_handle, (uint8_t *)sample->insn, sample->insn_len, + sample->ip, 1, &insn); + if (count > 0) { + if (machine__normalized_is(machine, "x86")) + printed += print_insn_x86(sample, thread, &insn[0], fp); + else + printed += fprintf(fp, "%s %s", insn[0].mnemonic, insn[0].op_str); + cs_free(insn, count); + } else { + printed += fprintf(fp, "illegal instruction"); + } + + cs_close(&cs_handle); + return printed; +} +#else +size_t sample__fprintf_insn_asm(struct perf_sample *sample __maybe_unused, + struct thread *thread __maybe_unused, + struct machine *machine __maybe_unused, + FILE *fp __maybe_unused) +{ + return 0; +} +#endif |