[PATCH] x86_64: Some fixes for single step handling
Ported from i386/Linus Be more careful with TF handling to fix some copy protection codes in Wine Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -185,7 +185,6 @@ static inline int
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setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, unsigned long mask, struct task_struct *me)
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setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, unsigned long mask, struct task_struct *me)
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{
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{
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int err = 0;
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int err = 0;
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unsigned long eflags;
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err |= __put_user(0, &sc->gs);
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err |= __put_user(0, &sc->gs);
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err |= __put_user(0, &sc->fs);
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err |= __put_user(0, &sc->fs);
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@ -209,11 +208,7 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, unsigned lo
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err |= __put_user(me->thread.trap_no, &sc->trapno);
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err |= __put_user(me->thread.trap_no, &sc->trapno);
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err |= __put_user(me->thread.error_code, &sc->err);
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err |= __put_user(me->thread.error_code, &sc->err);
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err |= __put_user(regs->rip, &sc->rip);
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err |= __put_user(regs->rip, &sc->rip);
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eflags = regs->eflags;
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err |= __put_user(regs->eflags, &sc->eflags);
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if (current->ptrace & PT_PTRACED) {
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eflags &= ~TF_MASK;
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}
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err |= __put_user(eflags, &sc->eflags);
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err |= __put_user(mask, &sc->oldmask);
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err |= __put_user(mask, &sc->oldmask);
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err |= __put_user(me->thread.cr2, &sc->cr2);
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err |= __put_user(me->thread.cr2, &sc->cr2);
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@ -323,14 +318,9 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
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regs->rsp = (unsigned long)frame;
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regs->rsp = (unsigned long)frame;
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set_fs(USER_DS);
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set_fs(USER_DS);
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if (regs->eflags & TF_MASK) {
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if ((current->ptrace & (PT_PTRACED | PT_DTRACE)) == (PT_PTRACED | PT_DTRACE)) {
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ptrace_notify(SIGTRAP);
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} else {
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regs->eflags &= ~TF_MASK;
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regs->eflags &= ~TF_MASK;
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}
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if (test_thread_flag(TIF_SINGLESTEP))
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}
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ptrace_notify(SIGTRAP);
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#ifdef DEBUG_SIG
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#ifdef DEBUG_SIG
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printk("SIG deliver (%s:%d): sp=%p pc=%p ra=%p\n",
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printk("SIG deliver (%s:%d): sp=%p pc=%p ra=%p\n",
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current->comm, current->pid, frame, regs->rip, frame->pretcode);
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current->comm, current->pid, frame, regs->rip, frame->pretcode);
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@ -688,8 +688,14 @@ asmlinkage void *do_debug(struct pt_regs * regs, unsigned long error_code)
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*/
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*/
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if ((regs->cs & 3) == 0)
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if ((regs->cs & 3) == 0)
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goto clear_TF_reenable;
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goto clear_TF_reenable;
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if ((tsk->ptrace & (PT_DTRACE|PT_PTRACED)) == PT_DTRACE)
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/*
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goto clear_TF;
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* Was the TF flag set by a debugger? If so, clear it now,
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* so that register information is correct.
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*/
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if (tsk->ptrace & PT_DTRACE) {
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regs->eflags &= ~TF_MASK;
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tsk->ptrace &= ~PT_DTRACE;
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}
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}
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}
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/* Ok, finally something we can handle */
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/* Ok, finally something we can handle */
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