diff options
Diffstat (limited to 'samples/hw_breakpoint/data_breakpoint.c')
| -rw-r--r-- | samples/hw_breakpoint/data_breakpoint.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/samples/hw_breakpoint/data_breakpoint.c b/samples/hw_breakpoint/data_breakpoint.c index 29525500df0..ef7f3229185 100644 --- a/samples/hw_breakpoint/data_breakpoint.c +++ b/samples/hw_breakpoint/data_breakpoint.c @@ -19,7 +19,7 @@ * * This file is a kernel module that places a breakpoint over ksym_name kernel * variable using Hardware Breakpoint register. The corresponding handler which - * prints a backtrace is invoked everytime a write operation is performed on + * prints a backtrace is invoked every time a write operation is performed on * that variable. * * Copyright (C) IBM Corporation, 2009 @@ -34,14 +34,16 @@ #include <linux/perf_event.h> #include <linux/hw_breakpoint.h> -struct perf_event **sample_hbp; +struct perf_event * __percpu *sample_hbp; static char ksym_name[KSYM_NAME_LEN] = "pid_max"; module_param_string(ksym, ksym_name, KSYM_NAME_LEN, S_IRUGO); MODULE_PARM_DESC(ksym, "Kernel symbol to monitor; this module will report any" " write operations on the kernel symbol"); -static void sample_hbp_handler(struct perf_event *temp, void *data) +static void sample_hbp_handler(struct perf_event *bp, + struct perf_sample_data *data, + struct pt_regs *regs) { printk(KERN_INFO "%s value is changed\n", ksym_name); dump_stack(); @@ -51,15 +53,16 @@ static void sample_hbp_handler(struct perf_event *temp, void *data) static int __init hw_break_module_init(void) { int ret; - DEFINE_BREAKPOINT_ATTR(attr); + struct perf_event_attr attr; + hw_breakpoint_init(&attr); attr.bp_addr = kallsyms_lookup_name(ksym_name); attr.bp_len = HW_BREAKPOINT_LEN_4; attr.bp_type = HW_BREAKPOINT_W | HW_BREAKPOINT_R; - sample_hbp = register_wide_hw_breakpoint(&attr, sample_hbp_handler); - if (IS_ERR(sample_hbp)) { - ret = PTR_ERR(sample_hbp); + sample_hbp = register_wide_hw_breakpoint(&attr, sample_hbp_handler, NULL); + if (IS_ERR((void __force *)sample_hbp)) { + ret = PTR_ERR((void __force *)sample_hbp); goto fail; } |