leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge branch 'oprofile/core' (early part) into oprofile/perf

Browse Source 
Conflicts:
	arch/arm/oprofile/common.c

Signed-off-by: Robert Richter <robert.richter@amd.com>
This commit is contained in:
Robert Richter 2010-10-11 19:33:42 +02:00
commit 652953b72e
2 changed files with 60 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

70
arch/x86/oprofile/backtrace.c
View File

@ -14,6 +14,7 @@
#include <asm/ptrace.h>
#include <asm/uaccess.h>
#include <asm/stacktrace.h>
#include <linux/compat.h>
static void backtrace_warning_symbol(void *data, char *msg,
unsigned long symbol)
@ -48,14 +49,12 @@ static struct stacktrace_ops backtrace_ops = {
.walk_stack = print_context_stack,
};
struct frame_head {
struct frame_head *bp;
unsigned long ret;
} __attribute__((packed));
static struct frame_head *dump_user_backtrace(struct frame_head *head)
#ifdef CONFIG_COMPAT
static struct stack_frame_ia32 *
dump_user_backtrace_32(struct stack_frame_ia32 *head)
{
struct frame_head bufhead[2];
struct stack_frame_ia32 bufhead[2];
struct stack_frame_ia32 *fp;
/* Also check accessibility of one struct frame_head beyond */
if (!access_ok(VERIFY_READ, head, sizeof(bufhead)))
@ -63,20 +62,66 @@ static struct frame_head *dump_user_backtrace(struct frame_head *head)
if (__copy_from_user_inatomic(bufhead, head, sizeof(bufhead)))
return NULL;
oprofile_add_trace(bufhead[0].ret);
fp = (struct stack_frame_ia32 *) compat_ptr(bufhead[0].next_frame);
oprofile_add_trace(bufhead[0].return_address);
/* frame pointers should strictly progress back up the stack
* (towards higher addresses) */
if (head >= fp)
return NULL;
return fp;
}
static inline int
x86_backtrace_32(struct pt_regs * const regs, unsigned int depth)
{
struct stack_frame_ia32 *head;
/* User process is 32-bit */
if (!current || !test_thread_flag(TIF_IA32))
return 0;
head = (struct stack_frame_ia32 *) regs->bp;
while (depth-- && head)
head = dump_user_backtrace_32(head);
return 1;
}
#else
static inline int
x86_backtrace_32(struct pt_regs * const regs, unsigned int depth)
{
return 0;
}
#endif /* CONFIG_COMPAT */
static struct stack_frame *dump_user_backtrace(struct stack_frame *head)
{
struct stack_frame bufhead[2];
/* Also check accessibility of one struct stack_frame beyond */
if (!access_ok(VERIFY_READ, head, sizeof(bufhead)))
return NULL;
if (__copy_from_user_inatomic(bufhead, head, sizeof(bufhead)))
return NULL;
oprofile_add_trace(bufhead[0].return_address);
/* frame pointers should strictly progress back up the stack
* (towards higher addresses) */
if (head >= bufhead[0].bp)
if (head >= bufhead[0].next_frame)
return NULL;
return bufhead[0].bp;
return bufhead[0].next_frame;
}
void
x86_backtrace(struct pt_regs * const regs, unsigned int depth)
{
struct frame_head *head = (struct frame_head *)frame_pointer(regs);
struct stack_frame *head = (struct stack_frame *)frame_pointer(regs);
if (!user_mode_vm(regs)) {
unsigned long stack = kernel_stack_pointer(regs);
@ -86,6 +131,9 @@ x86_backtrace(struct pt_regs * const regs, unsigned int depth)
return;
}
if (x86_backtrace_32(regs, depth))
return;
while (depth-- && head)
head = dump_user_backtrace(head);
}

9
arch/x86/oprofile/nmi_int.c
View File

@ -695,9 +695,6 @@ static int __init ppro_init(char **cpu_type)
return 1;
}
/* in order to get sysfs right */
static int using_nmi;
int __init op_nmi_init(struct oprofile_operations *ops)
{
__u8 vendor = boot_cpu_data.x86_vendor;
@ -705,8 +702,6 @@ int __init op_nmi_init(struct oprofile_operations *ops)
char *cpu_type = NULL;
int ret = 0;
using_nmi = 0;
if (!cpu_has_apic)
return -ENODEV;
@ -790,13 +785,11 @@ int __init op_nmi_init(struct oprofile_operations *ops)
if (ret)
return ret;
using_nmi = 1;
printk(KERN_INFO "oprofile: using NMI interrupt.\n");
return 0;
}
void op_nmi_exit(void)
{
if (using_nmi)
exit_sysfs();
exit_sysfs();
}