From: Mao Han <han_mao@xxxxxxxxx> This patch add support for DWARF register mappings and libdw registers initialization, which is used by perf callchain analyzing when --call-graph=dwarf is given. Here is elfutils csky backend patch set: https://sourceware.org/ml/elfutils-devel/2019-q2/msg00007.html Signed-off-by: Mao Han <han_mao@xxxxxxxxx> Signed-off-by: Guo Ren <ren_guo@xxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx> Cc: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: Namhyung Kim <namhyung@xxxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxx> --- tools/arch/csky/include/uapi/asm/perf_regs.h | 51 ++++++++++++++ tools/perf/Makefile.config | 6 +- tools/perf/arch/csky/Build | 1 + tools/perf/arch/csky/Makefile | 3 + tools/perf/arch/csky/include/perf_regs.h | 100 +++++++++++++++++++++++++++ tools/perf/arch/csky/util/Build | 2 + tools/perf/arch/csky/util/dwarf-regs.c | 49 +++++++++++++ tools/perf/arch/csky/util/unwind-libdw.c | 77 +++++++++++++++++++++ 8 files changed, 288 insertions(+), 1 deletion(-) create mode 100644 tools/arch/csky/include/uapi/asm/perf_regs.h create mode 100644 tools/perf/arch/csky/Build create mode 100644 tools/perf/arch/csky/Makefile create mode 100644 tools/perf/arch/csky/include/perf_regs.h create mode 100644 tools/perf/arch/csky/util/Build create mode 100644 tools/perf/arch/csky/util/dwarf-regs.c create mode 100644 tools/perf/arch/csky/util/unwind-libdw.c diff --git a/tools/arch/csky/include/uapi/asm/perf_regs.h b/tools/arch/csky/include/uapi/asm/perf_regs.h new file mode 100644 index 0000000..ee323d8 --- /dev/null +++ b/tools/arch/csky/include/uapi/asm/perf_regs.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd. + +#ifndef _ASM_CSKY_PERF_REGS_H +#define _ASM_CSKY_PERF_REGS_H + +/* Index of struct pt_regs */ +enum perf_event_csky_regs { + PERF_REG_CSKY_TLS, + PERF_REG_CSKY_LR, + PERF_REG_CSKY_PC, + PERF_REG_CSKY_SR, + PERF_REG_CSKY_SP, + PERF_REG_CSKY_ORIG_A0, + PERF_REG_CSKY_A0, + PERF_REG_CSKY_A1, + PERF_REG_CSKY_A2, + PERF_REG_CSKY_A3, + PERF_REG_CSKY_REGS0, + PERF_REG_CSKY_REGS1, + PERF_REG_CSKY_REGS2, + PERF_REG_CSKY_REGS3, + PERF_REG_CSKY_REGS4, + PERF_REG_CSKY_REGS5, + PERF_REG_CSKY_REGS6, + PERF_REG_CSKY_REGS7, + PERF_REG_CSKY_REGS8, + PERF_REG_CSKY_REGS9, +#if defined(__CSKYABIV2__) + PERF_REG_CSKY_EXREGS0, + PERF_REG_CSKY_EXREGS1, + PERF_REG_CSKY_EXREGS2, + PERF_REG_CSKY_EXREGS3, + PERF_REG_CSKY_EXREGS4, + PERF_REG_CSKY_EXREGS5, + PERF_REG_CSKY_EXREGS6, + PERF_REG_CSKY_EXREGS7, + PERF_REG_CSKY_EXREGS8, + PERF_REG_CSKY_EXREGS9, + PERF_REG_CSKY_EXREGS10, + PERF_REG_CSKY_EXREGS11, + PERF_REG_CSKY_EXREGS12, + PERF_REG_CSKY_EXREGS13, + PERF_REG_CSKY_EXREGS14, + PERF_REG_CSKY_HI, + PERF_REG_CSKY_LO, + PERF_REG_CSKY_DCSR, +#endif + PERF_REG_CSKY_MAX, +}; +#endif /* _ASM_CSKY_PERF_REGS_H */ diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index fe3f97e..42985ae 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -59,6 +59,10 @@ ifeq ($(SRCARCH),arm64) LIBUNWIND_LIBS = -lunwind -lunwind-aarch64 endif +ifeq ($(SRCARCH),csky) + NO_PERF_REGS := 0 +endif + ifeq ($(ARCH),s390) NO_PERF_REGS := 0 NO_SYSCALL_TABLE := 0 @@ -77,7 +81,7 @@ endif # Disable it on all other architectures in case libdw unwind # support is detected in system. Add supported architectures # to the check. -ifneq ($(SRCARCH),$(filter $(SRCARCH),x86 arm arm64 powerpc s390)) +ifneq ($(SRCARCH),$(filter $(SRCARCH),x86 arm arm64 powerpc s390 csky)) NO_LIBDW_DWARF_UNWIND := 1 endif diff --git a/tools/perf/arch/csky/Build b/tools/perf/arch/csky/Build new file mode 100644 index 0000000..e4e5f33 --- /dev/null +++ b/tools/perf/arch/csky/Build @@ -0,0 +1 @@ +perf-y += util/ diff --git a/tools/perf/arch/csky/Makefile b/tools/perf/arch/csky/Makefile new file mode 100644 index 0000000..7fbca17 --- /dev/null +++ b/tools/perf/arch/csky/Makefile @@ -0,0 +1,3 @@ +ifndef NO_DWARF +PERF_HAVE_DWARF_REGS := 1 +endif diff --git a/tools/perf/arch/csky/include/perf_regs.h b/tools/perf/arch/csky/include/perf_regs.h new file mode 100644 index 0000000..8f336ea --- /dev/null +++ b/tools/perf/arch/csky/include/perf_regs.h @@ -0,0 +1,100 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd. + +#ifndef ARCH_PERF_REGS_H +#define ARCH_PERF_REGS_H + +#include <stdlib.h> +#include <linux/types.h> +#include <asm/perf_regs.h> + +#define PERF_REGS_MASK ((1ULL << PERF_REG_CSKY_MAX) - 1) +#define PERF_REGS_MAX PERF_REG_CSKY_MAX +#define PERF_SAMPLE_REGS_ABI PERF_SAMPLE_REGS_ABI_32 + +#define PERF_REG_IP PERF_REG_CSKY_PC +#define PERF_REG_SP PERF_REG_CSKY_SP + +static inline const char *perf_reg_name(int id) +{ + switch (id) { + case PERF_REG_CSKY_A0: + return "a0"; + case PERF_REG_CSKY_A1: + return "a1"; + case PERF_REG_CSKY_A2: + return "a2"; + case PERF_REG_CSKY_A3: + return "a3"; + case PERF_REG_CSKY_REGS0: + return "regs0"; + case PERF_REG_CSKY_REGS1: + return "regs1"; + case PERF_REG_CSKY_REGS2: + return "regs2"; + case PERF_REG_CSKY_REGS3: + return "regs3"; + case PERF_REG_CSKY_REGS4: + return "regs4"; + case PERF_REG_CSKY_REGS5: + return "regs5"; + case PERF_REG_CSKY_REGS6: + return "regs6"; + case PERF_REG_CSKY_REGS7: + return "regs7"; + case PERF_REG_CSKY_REGS8: + return "regs8"; + case PERF_REG_CSKY_REGS9: + return "regs9"; + case PERF_REG_CSKY_SP: + return "sp"; + case PERF_REG_CSKY_LR: + return "lr"; + case PERF_REG_CSKY_PC: + return "pc"; +#if defined(__CSKYABIV2__) + case PERF_REG_CSKY_EXREGS0: + return "exregs0"; + case PERF_REG_CSKY_EXREGS1: + return "exregs1"; + case PERF_REG_CSKY_EXREGS2: + return "exregs2"; + case PERF_REG_CSKY_EXREGS3: + return "exregs3"; + case PERF_REG_CSKY_EXREGS4: + return "exregs4"; + case PERF_REG_CSKY_EXREGS5: + return "exregs5"; + case PERF_REG_CSKY_EXREGS6: + return "exregs6"; + case PERF_REG_CSKY_EXREGS7: + return "exregs7"; + case PERF_REG_CSKY_EXREGS8: + return "exregs8"; + case PERF_REG_CSKY_EXREGS9: + return "exregs9"; + case PERF_REG_CSKY_EXREGS10: + return "exregs10"; + case PERF_REG_CSKY_EXREGS11: + return "exregs11"; + case PERF_REG_CSKY_EXREGS12: + return "exregs12"; + case PERF_REG_CSKY_EXREGS13: + return "exregs13"; + case PERF_REG_CSKY_EXREGS14: + return "exregs14"; + case PERF_REG_CSKY_TLS: + return "tls"; + case PERF_REG_CSKY_HI: + return "hi"; + case PERF_REG_CSKY_LO: + return "lo"; +#endif + default: + return NULL; + } + + return NULL; +} + +#endif /* ARCH_PERF_REGS_H */ diff --git a/tools/perf/arch/csky/util/Build b/tools/perf/arch/csky/util/Build new file mode 100644 index 0000000..1160bb2 --- /dev/null +++ b/tools/perf/arch/csky/util/Build @@ -0,0 +1,2 @@ +perf-$(CONFIG_DWARF) += dwarf-regs.o +perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o diff --git a/tools/perf/arch/csky/util/dwarf-regs.c b/tools/perf/arch/csky/util/dwarf-regs.c new file mode 100644 index 0000000..ca86eca --- /dev/null +++ b/tools/perf/arch/csky/util/dwarf-regs.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd. +// Mapping of DWARF debug register numbers into register names. + +#include <stddef.h> +#include <dwarf-regs.h> + +#if defined(__CSKYABIV2__) +#define CSKY_MAX_REGS 73 +const char *csky_dwarf_regs_table[CSKY_MAX_REGS] = { + /* r0 ~ r8 */ + "%a0", "%a1", "%a2", "%a3", "%regs0", "%regs1", "%regs2", "%regs3", + /* r9 ~ r15 */ + "%regs4", "%regs5", "%regs6", "%regs7", "%regs8", "%regs9", "%sp", + "%lr", + /* r16 ~ r23 */ + "%exregs0", "%exregs1", "%exregs2", "%exregs3", "%exregs4", + "%exregs5", "%exregs6", "%exregs7", + /* r24 ~ r31 */ + "%exregs8", "%exregs9", "%exregs10", "%exregs11", "%exregs12", + "%exregs13", "%exregs14", "%tls", + "%pc", NULL, NULL, NULL, "%hi", "%lo", NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + "%epc", +}; +#else +#define CSKY_MAX_REGS 57 +const char *csky_dwarf_regs_table[CSKY_MAX_REGS] = { + /* r0 ~ r8 */ + "%sp", "%regs9", "%a0", "%a1", "%a2", "%a3", "%regs0", "%regs1", + /* r9 ~ r15 */ + "%regs2", "%regs3", "%regs4", "%regs5", "%regs6", "%regs7", "%regs8", + "%lr", + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, + "%epc", +}; +#endif + +const char *get_arch_regstr(unsigned int n) +{ + return (n < CSKY_MAX_REGS) ? csky_dwarf_regs_table[n] : NULL; +} diff --git a/tools/perf/arch/csky/util/unwind-libdw.c b/tools/perf/arch/csky/util/unwind-libdw.c new file mode 100644 index 0000000..4bb4a06 --- /dev/null +++ b/tools/perf/arch/csky/util/unwind-libdw.c @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd. + +#include <elfutils/libdwfl.h> +#include "../../util/unwind-libdw.h" +#include "../../util/perf_regs.h" +#include "../../util/event.h" + +bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg) +{ + struct unwind_info *ui = arg; + struct regs_dump *user_regs = &ui->sample->user_regs; + Dwarf_Word dwarf_regs[PERF_REG_CSKY_MAX]; + +#define REG(r) ({ \ + Dwarf_Word val = 0; \ + perf_reg_value(&val, user_regs, PERF_REG_CSKY_##r); \ + val; \ +}) + +#if defined(__CSKYABIV2__) + dwarf_regs[0] = REG(A0); + dwarf_regs[1] = REG(A1); + dwarf_regs[2] = REG(A2); + dwarf_regs[3] = REG(A3); + dwarf_regs[4] = REG(REGS0); + dwarf_regs[5] = REG(REGS1); + dwarf_regs[6] = REG(REGS2); + dwarf_regs[7] = REG(REGS3); + dwarf_regs[8] = REG(REGS4); + dwarf_regs[9] = REG(REGS5); + dwarf_regs[10] = REG(REGS6); + dwarf_regs[11] = REG(REGS7); + dwarf_regs[12] = REG(REGS8); + dwarf_regs[13] = REG(REGS9); + dwarf_regs[14] = REG(SP); + dwarf_regs[15] = REG(LR); + dwarf_regs[16] = REG(EXREGS0); + dwarf_regs[17] = REG(EXREGS1); + dwarf_regs[18] = REG(EXREGS2); + dwarf_regs[19] = REG(EXREGS3); + dwarf_regs[20] = REG(EXREGS4); + dwarf_regs[21] = REG(EXREGS5); + dwarf_regs[22] = REG(EXREGS6); + dwarf_regs[23] = REG(EXREGS7); + dwarf_regs[24] = REG(EXREGS8); + dwarf_regs[25] = REG(EXREGS9); + dwarf_regs[26] = REG(EXREGS10); + dwarf_regs[27] = REG(EXREGS11); + dwarf_regs[28] = REG(EXREGS12); + dwarf_regs[29] = REG(EXREGS13); + dwarf_regs[30] = REG(EXREGS14); + dwarf_regs[31] = REG(TLS); + dwarf_regs[32] = REG(PC); +#else + dwarf_regs[0] = REG(SP); + dwarf_regs[1] = REG(REGS9); + dwarf_regs[2] = REG(A0); + dwarf_regs[3] = REG(A1); + dwarf_regs[4] = REG(A2); + dwarf_regs[5] = REG(A3); + dwarf_regs[6] = REG(REGS0); + dwarf_regs[7] = REG(REGS1); + dwarf_regs[8] = REG(REGS2); + dwarf_regs[9] = REG(REGS3); + dwarf_regs[10] = REG(REGS4); + dwarf_regs[11] = REG(REGS5); + dwarf_regs[12] = REG(REGS6); + dwarf_regs[13] = REG(REGS7); + dwarf_regs[14] = REG(REGS8); + dwarf_regs[15] = REG(LR); +#endif + dwfl_thread_state_register_pc(thread, REG(PC)); + + return dwfl_thread_state_registers(thread, 0, PERF_REG_CSKY_MAX, + dwarf_regs); +} -- 2.7.4
