lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

x86, ptrace: change BTS GET ptrace interface

Browse Source 
Change the ptrace interface to mimick an array from newst to oldest.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Markus Metzger
2008-01-30 13:31:20 +01:00
committed by Ingo Molnar
parent 3c68904fee
commit e4811f2568
2 changed files with 22 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
arch/x86/kernel/ptrace.c
View File

@ -479,26 +479,33 @@ static int ptrace_bts_get_buffer_size(struct task_struct *child)
return ds_get_bts_size((void *)child->thread.ds_area_msr);
}
static int ptrace_bts_get_index(struct task_struct *child)
{
if (!child->thread.ds_area_msr)
return -ENXIO;
return ds_get_bts_index((void *)child->thread.ds_area_msr);
}
static int ptrace_bts_read_record(struct task_struct *child,
long index,
struct bts_struct __user *out)
{
struct bts_struct ret;
int retval;
int bts_size;
int bts_index;
if (!child->thread.ds_area_msr)
return -ENXIO;
if (index < 0)
return -EINVAL;
bts_size = ds_get_bts_size((void *)child->thread.ds_area_msr);
if (bts_size <= index)
return -EINVAL;
/* translate the ptrace bts index into the ds bts index */
bts_index = ds_get_bts_index((void *)child->thread.ds_area_msr);
bts_index -= (index + 1);
if (bts_index < 0)
bts_index += bts_size;
retval = ds_read_bts((void *)child->thread.ds_area_msr,
index, &ret);
bts_index, &ret);
if (retval)
return retval;
@ -813,10 +820,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
ret = ptrace_bts_get_buffer_size(child);
break;
case PTRACE_BTS_GET_INDEX:
ret = ptrace_bts_get_index(child);
break;
case PTRACE_BTS_READ_RECORD:
ret = ptrace_bts_read_record
(child, data,
@ -1017,7 +1020,6 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data)
case PTRACE_BTS_MAX_BUFFER_SIZE:
case PTRACE_BTS_ALLOCATE_BUFFER:
case PTRACE_BTS_GET_BUFFER_SIZE:
case PTRACE_BTS_GET_INDEX:
case PTRACE_BTS_READ_RECORD:
case PTRACE_BTS_CONFIG:
case PTRACE_BTS_STATUS: