diff options
| author | Roland McGrath <roland@redhat.com> | 2008-01-30 13:30:58 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:30:58 +0100 |
| commit | d277fb89dfb042deba04a8e765718cc8b3825e85 (patch) | |
| tree | a42aa151708c71094a856ffefc7f6cf566228328 /arch | |
| parent | 5fd4d16bd59a9fc84ca94c4fce4abc23fe219108 (diff) | |
x86: x86-64 ia32 ptrace get/putreg32 current task
This generalizes the getreg32 and putreg32 functions so they can be used on
the current task, as well as on a task stopped in TASK_TRACED and switched
off. This lays the groundwork to share this code for all kinds of
user-mode machine state access, not just ptrace.
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 'arch')
| -rw-r--r-- | arch/x86/ia32/ptrace32.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/x86/ia32/ptrace32.c b/arch/x86/ia32/ptrace32.c index c52d0664c67..d5663e29533 100644 --- a/arch/x86/ia32/ptrace32.c +++ b/arch/x86/ia32/ptrace32.c @@ -48,19 +48,27 @@ static int putreg32(struct task_struct *child, unsigned regno, u32 val) if (val && (val & 3) != 3) return -EIO; child->thread.fsindex = val & 0xffff; + if (child == current) + loadsegment(fs, child->thread.fsindex); break; case offsetof(struct user32, regs.gs): if (val && (val & 3) != 3) return -EIO; child->thread.gsindex = val & 0xffff; + if (child == current) + load_gs_index(child->thread.gsindex); break; case offsetof(struct user32, regs.ds): if (val && (val & 3) != 3) return -EIO; child->thread.ds = val & 0xffff; + if (child == current) + loadsegment(ds, child->thread.ds); break; case offsetof(struct user32, regs.es): child->thread.es = val & 0xffff; + if (child == current) + loadsegment(es, child->thread.ds); break; case offsetof(struct user32, regs.ss): if ((val & 3) != 3) @@ -129,15 +137,23 @@ static int getreg32(struct task_struct *child, unsigned regno, u32 *val) switch (regno) { case offsetof(struct user32, regs.fs): *val = child->thread.fsindex; + if (child == current) + asm("movl %%fs,%0" : "=r" (*val)); break; case offsetof(struct user32, regs.gs): *val = child->thread.gsindex; + if (child == current) + asm("movl %%gs,%0" : "=r" (*val)); break; case offsetof(struct user32, regs.ds): *val = child->thread.ds; + if (child == current) + asm("movl %%ds,%0" : "=r" (*val)); break; case offsetof(struct user32, regs.es): *val = child->thread.es; + if (child == current) + asm("movl %%es,%0" : "=r" (*val)); break; R32(cs, cs); |