diff options
Diffstat (limited to 'arch/sh/oprofile')
| -rw-r--r-- | arch/sh/oprofile/Makefile | 16 | ||||
| -rw-r--r-- | arch/sh/oprofile/backtrace.c | 87 | ||||
| -rw-r--r-- | arch/sh/oprofile/common.c | 64 |
3 files changed, 0 insertions, 167 deletions
diff --git a/arch/sh/oprofile/Makefile b/arch/sh/oprofile/Makefile deleted file mode 100644 index d478dd8dac0b..000000000000 --- a/arch/sh/oprofile/Makefile +++ /dev/null @@ -1,16 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -obj-$(CONFIG_OPROFILE) += oprofile.o - -CFLAGS_common.o += -DUTS_MACHINE='"$(UTS_MACHINE)"' - -DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \ - oprof.o cpu_buffer.o buffer_sync.o \ - event_buffer.o oprofile_files.o \ - oprofilefs.o oprofile_stats.o \ - timer_int.o ) - -ifeq ($(CONFIG_HW_PERF_EVENTS),y) -DRIVER_OBJS += $(addprefix ../../../drivers/oprofile/, oprofile_perf.o) -endif - -oprofile-y := $(DRIVER_OBJS) common.o backtrace.o diff --git a/arch/sh/oprofile/backtrace.c b/arch/sh/oprofile/backtrace.c deleted file mode 100644 index f1205f92631d..000000000000 --- a/arch/sh/oprofile/backtrace.c +++ /dev/null @@ -1,87 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * SH specific backtracing code for oprofile - * - * Copyright 2007 STMicroelectronics Ltd. - * - * Author: Dave Peverley <dpeverley@mpc-data.co.uk> - * - * Based on ARM oprofile backtrace code by Richard Purdie and in turn, i386 - * oprofile backtrace code by John Levon, David Smith - */ -#include <linux/oprofile.h> -#include <linux/sched.h> -#include <linux/kallsyms.h> -#include <linux/mm.h> -#include <asm/unwinder.h> -#include <asm/ptrace.h> -#include <linux/uaccess.h> -#include <asm/sections.h> -#include <asm/stacktrace.h> - -static int backtrace_stack(void *data, char *name) -{ - /* Yes, we want all stacks */ - return 0; -} - -static void backtrace_address(void *data, unsigned long addr, int reliable) -{ - unsigned int *depth = data; - - if ((*depth)--) - oprofile_add_trace(addr); -} - -static struct stacktrace_ops backtrace_ops = { - .stack = backtrace_stack, - .address = backtrace_address, -}; - -/* Limit to stop backtracing too far. */ -static int backtrace_limit = 20; - -static unsigned long * -user_backtrace(unsigned long *stackaddr, struct pt_regs *regs) -{ - unsigned long buf_stack; - - /* Also check accessibility of address */ - if (!access_ok(stackaddr, sizeof(unsigned long))) - return NULL; - - if (__copy_from_user_inatomic(&buf_stack, stackaddr, sizeof(unsigned long))) - return NULL; - - /* Quick paranoia check */ - if (buf_stack & 3) - return NULL; - - oprofile_add_trace(buf_stack); - - stackaddr++; - - return stackaddr; -} - -void sh_backtrace(struct pt_regs * const regs, unsigned int depth) -{ - unsigned long *stackaddr; - - /* - * Paranoia - clip max depth as we could get lost in the weeds. - */ - if (depth > backtrace_limit) - depth = backtrace_limit; - - stackaddr = (unsigned long *)kernel_stack_pointer(regs); - if (!user_mode(regs)) { - if (depth) - unwind_stack(NULL, regs, stackaddr, - &backtrace_ops, &depth); - return; - } - - while (depth-- && (stackaddr != NULL)) - stackaddr = user_backtrace(stackaddr, regs); -} diff --git a/arch/sh/oprofile/common.c b/arch/sh/oprofile/common.c deleted file mode 100644 index e4dd5d5a1115..000000000000 --- a/arch/sh/oprofile/common.c +++ /dev/null @@ -1,64 +0,0 @@ -/* - * arch/sh/oprofile/init.c - * - * Copyright (C) 2003 - 2010 Paul Mundt - * - * Based on arch/mips/oprofile/common.c: - * - * Copyright (C) 2004, 2005 Ralf Baechle - * Copyright (C) 2005 MIPS Technologies, Inc. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ -#include <linux/kernel.h> -#include <linux/oprofile.h> -#include <linux/init.h> -#include <linux/errno.h> -#include <linux/smp.h> -#include <linux/perf_event.h> -#include <linux/slab.h> -#include <asm/processor.h> - -extern void sh_backtrace(struct pt_regs * const regs, unsigned int depth); - -#ifdef CONFIG_HW_PERF_EVENTS -/* - * This will need to be reworked when multiple PMUs are supported. - */ -static char *sh_pmu_op_name; - -char *op_name_from_perf_id(void) -{ - return sh_pmu_op_name; -} - -int __init oprofile_arch_init(struct oprofile_operations *ops) -{ - ops->backtrace = sh_backtrace; - - if (perf_num_counters() == 0) - return -ENODEV; - - sh_pmu_op_name = kasprintf(GFP_KERNEL, "%s/%s", - UTS_MACHINE, perf_pmu_name()); - if (unlikely(!sh_pmu_op_name)) - return -ENOMEM; - - return oprofile_perf_init(ops); -} - -void oprofile_arch_exit(void) -{ - oprofile_perf_exit(); - kfree(sh_pmu_op_name); -} -#else -int __init oprofile_arch_init(struct oprofile_operations *ops) -{ - ops->backtrace = sh_backtrace; - return -ENODEV; -} -void oprofile_arch_exit(void) {} -#endif /* CONFIG_HW_PERF_EVENTS */ |