diff options
| author | Roland McGrath <roland@redhat.com> | 2008-01-30 13:30:54 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:30:54 +0100 |
| commit | 10faa81e102e2b7695f386812055cd2ef9e44b4c (patch) | |
| tree | bd21d2094eacca5b07d5ee5977cb0ad57ebc5c02 /include/asm-x86/ptrace.h | |
| parent | 7e9916040b3020d0f36d68bb7512e3b80b623097 (diff) | |
x86: debugctlmsr arch_has_block_step
This implements user-mode step-until-branch on x86 using the BTF bit
in MSR_IA32_DEBUGCTLMSR. It's just like single-step, only less so.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86/ptrace.h')
| -rw-r--r-- | include/asm-x86/ptrace.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/asm-x86/ptrace.h b/include/asm-x86/ptrace.h index d223decd7b01..04204f359298 100644 --- a/include/asm-x86/ptrace.h +++ b/include/asm-x86/ptrace.h @@ -150,6 +150,13 @@ enum { extern void user_enable_single_step(struct task_struct *); extern void user_disable_single_step(struct task_struct *); +extern void user_enable_block_step(struct task_struct *); +#ifdef CONFIG_X86_DEBUGCTLMSR +#define arch_has_block_step() (1) +#else +#define arch_has_block_step() (boot_cpu_data.x86 >= 6) +#endif + struct user_desc; extern int do_get_thread_area(struct task_struct *p, int idx, struct user_desc __user *info); |