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Merge signal handler branch
This commit is contained in:
Russell King
Russell King
commit
c089785655
@ -134,17 +134,6 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
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#ifdef CONFIG_IWMMXT
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/* iwmmxt_area is 0x98 bytes long, preceeded by 8 bytes of signature */
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#define IWMMXT_STORAGE_SIZE (0x98 + 8)
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#define IWMMXT_MAGIC0 0x12ef842a
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#define IWMMXT_MAGIC1 0x1c07ca71
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struct iwmmxt_sigframe {
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unsigned long magic0;
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unsigned long magic1;
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unsigned long storage[0x98/4];
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};
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static int preserve_iwmmxt_context(struct iwmmxt_sigframe *frame)
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{
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char kbuf[sizeof(*frame) + 8];
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@ -152,8 +141,8 @@ static int preserve_iwmmxt_context(struct iwmmxt_sigframe *frame)
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/* the iWMMXt context must be 64 bit aligned */
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kframe = (struct iwmmxt_sigframe *)((unsigned long)(kbuf + 8) & ~7);
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kframe->magic0 = IWMMXT_MAGIC0;
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kframe->magic1 = IWMMXT_MAGIC1;
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kframe->magic = IWMMXT_MAGIC;
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kframe->size = IWMMXT_STORAGE_SIZE;
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iwmmxt_task_copy(current_thread_info(), &kframe->storage);
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return __copy_to_user(frame, kframe, sizeof(*frame));
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}
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@ -167,8 +156,8 @@ static int restore_iwmmxt_context(struct iwmmxt_sigframe *frame)
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kframe = (struct iwmmxt_sigframe *)((unsigned long)(kbuf + 8) & ~7);
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if (__copy_from_user(kframe, frame, sizeof(*frame)))
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return -1;
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if (kframe->magic0 != IWMMXT_MAGIC0 ||
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kframe->magic1 != IWMMXT_MAGIC1)
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if (kframe->magic != IWMMXT_MAGIC ||
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kframe->size != IWMMXT_STORAGE_SIZE)
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return -1;
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iwmmxt_task_restore(current_thread_info(), &kframe->storage);
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return 0;
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@ -176,71 +165,62 @@ static int restore_iwmmxt_context(struct iwmmxt_sigframe *frame)
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#endif
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/*
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* Auxiliary signal frame. This saves stuff like FP state.
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* The layout of this structure is not part of the user ABI.
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*/
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struct aux_sigframe {
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#ifdef CONFIG_IWMMXT
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struct iwmmxt_sigframe iwmmxt;
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#endif
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#ifdef CONFIG_VFP
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union vfp_state vfp;
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#endif
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};
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/*
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* Do a signal return; undo the signal stack. These are aligned to 64-bit.
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*/
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struct sigframe {
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struct sigcontext sc;
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unsigned long extramask[_NSIG_WORDS-1];
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struct ucontext uc;
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unsigned long retcode[2];
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struct aux_sigframe aux __attribute__((aligned(8)));
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};
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struct rt_sigframe {
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struct siginfo __user *pinfo;
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void __user *puc;
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struct siginfo info;
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struct ucontext uc;
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unsigned long retcode[2];
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struct aux_sigframe aux __attribute__((aligned(8)));
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struct sigframe sig;
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};
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static int
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restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc,
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struct aux_sigframe __user *aux)
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static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf)
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{
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int err = 0;
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struct aux_sigframe __user *aux;
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sigset_t set;
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int err;
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__get_user_error(regs->ARM_r0, &sc->arm_r0, err);
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__get_user_error(regs->ARM_r1, &sc->arm_r1, err);
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__get_user_error(regs->ARM_r2, &sc->arm_r2, err);
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__get_user_error(regs->ARM_r3, &sc->arm_r3, err);
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__get_user_error(regs->ARM_r4, &sc->arm_r4, err);
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__get_user_error(regs->ARM_r5, &sc->arm_r5, err);
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__get_user_error(regs->ARM_r6, &sc->arm_r6, err);
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__get_user_error(regs->ARM_r7, &sc->arm_r7, err);
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__get_user_error(regs->ARM_r8, &sc->arm_r8, err);
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__get_user_error(regs->ARM_r9, &sc->arm_r9, err);
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__get_user_error(regs->ARM_r10, &sc->arm_r10, err);
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__get_user_error(regs->ARM_fp, &sc->arm_fp, err);
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__get_user_error(regs->ARM_ip, &sc->arm_ip, err);
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__get_user_error(regs->ARM_sp, &sc->arm_sp, err);
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__get_user_error(regs->ARM_lr, &sc->arm_lr, err);
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__get_user_error(regs->ARM_pc, &sc->arm_pc, err);
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__get_user_error(regs->ARM_cpsr, &sc->arm_cpsr, err);
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err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
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if (err == 0) {
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sigdelsetmask(&set, ~_BLOCKABLE);
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spin_lock_irq(¤t->sighand->siglock);
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current->blocked = set;
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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}
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__get_user_error(regs->ARM_r0, &sf->uc.uc_mcontext.arm_r0, err);
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__get_user_error(regs->ARM_r1, &sf->uc.uc_mcontext.arm_r1, err);
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__get_user_error(regs->ARM_r2, &sf->uc.uc_mcontext.arm_r2, err);
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__get_user_error(regs->ARM_r3, &sf->uc.uc_mcontext.arm_r3, err);
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__get_user_error(regs->ARM_r4, &sf->uc.uc_mcontext.arm_r4, err);
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__get_user_error(regs->ARM_r5, &sf->uc.uc_mcontext.arm_r5, err);
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__get_user_error(regs->ARM_r6, &sf->uc.uc_mcontext.arm_r6, err);
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__get_user_error(regs->ARM_r7, &sf->uc.uc_mcontext.arm_r7, err);
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__get_user_error(regs->ARM_r8, &sf->uc.uc_mcontext.arm_r8, err);
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__get_user_error(regs->ARM_r9, &sf->uc.uc_mcontext.arm_r9, err);
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__get_user_error(regs->ARM_r10, &sf->uc.uc_mcontext.arm_r10, err);
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__get_user_error(regs->ARM_fp, &sf->uc.uc_mcontext.arm_fp, err);
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__get_user_error(regs->ARM_ip, &sf->uc.uc_mcontext.arm_ip, err);
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__get_user_error(regs->ARM_sp, &sf->uc.uc_mcontext.arm_sp, err);
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__get_user_error(regs->ARM_lr, &sf->uc.uc_mcontext.arm_lr, err);
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__get_user_error(regs->ARM_pc, &sf->uc.uc_mcontext.arm_pc, err);
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__get_user_error(regs->ARM_cpsr, &sf->uc.uc_mcontext.arm_cpsr, err);
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err |= !valid_user_regs(regs);
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aux = (struct aux_sigframe __user *) sf->uc.uc_regspace;
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#ifdef CONFIG_IWMMXT
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if (err == 0 && test_thread_flag(TIF_USING_IWMMXT))
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err |= restore_iwmmxt_context(&aux->iwmmxt);
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#endif
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#ifdef CONFIG_VFP
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// if (err == 0)
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// err |= vfp_restore_state(&aux->vfp);
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// err |= vfp_restore_state(&sf->aux.vfp);
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#endif
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return err;
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@ -249,7 +229,6 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc,
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asmlinkage int sys_sigreturn(struct pt_regs *regs)
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{
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struct sigframe __user *frame;
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sigset_t set;
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/* Always make any pending restarted system calls return -EINTR */
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current_thread_info()->restart_block.fn = do_no_restart_syscall;
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@ -266,19 +245,8 @@ asmlinkage int sys_sigreturn(struct pt_regs *regs)
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if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
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goto badframe;
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if (__get_user(set.sig[0], &frame->sc.oldmask)
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|| (_NSIG_WORDS > 1
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&& __copy_from_user(&set.sig[1], &frame->extramask,
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sizeof(frame->extramask))))
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goto badframe;
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sigdelsetmask(&set, ~_BLOCKABLE);
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spin_lock_irq(¤t->sighand->siglock);
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current->blocked = set;
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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if (restore_sigcontext(regs, &frame->sc, &frame->aux))
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if (restore_sigframe(regs, frame))
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goto badframe;
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/* Send SIGTRAP if we're single-stepping */
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@ -297,7 +265,6 @@ badframe:
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asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
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{
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struct rt_sigframe __user *frame;
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sigset_t set;
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/* Always make any pending restarted system calls return -EINTR */
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current_thread_info()->restart_block.fn = do_no_restart_syscall;
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@ -314,19 +281,11 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
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if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
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goto badframe;
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if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
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if (restore_sigframe(regs, &frame->sig))
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goto badframe;
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sigdelsetmask(&set, ~_BLOCKABLE);
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spin_lock_irq(¤t->sighand->siglock);
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current->blocked = set;
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &frame->aux))
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goto badframe;
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if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->ARM_sp) == -EFAULT)
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if (do_sigaltstack(&frame->sig.uc.uc_stack, NULL, regs->ARM_sp) == -EFAULT)
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goto badframe;
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/* Send SIGTRAP if we're single-stepping */
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@ -343,42 +302,46 @@ badframe:
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}
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static int
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setup_sigcontext(struct sigcontext __user *sc, struct aux_sigframe __user *aux,
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struct pt_regs *regs, unsigned long mask)
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setup_sigframe(struct sigframe __user *sf, struct pt_regs *regs, sigset_t *set)
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{
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struct aux_sigframe __user *aux;
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int err = 0;
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__put_user_error(regs->ARM_r0, &sc->arm_r0, err);
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__put_user_error(regs->ARM_r1, &sc->arm_r1, err);
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__put_user_error(regs->ARM_r2, &sc->arm_r2, err);
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__put_user_error(regs->ARM_r3, &sc->arm_r3, err);
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__put_user_error(regs->ARM_r4, &sc->arm_r4, err);
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__put_user_error(regs->ARM_r5, &sc->arm_r5, err);
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__put_user_error(regs->ARM_r6, &sc->arm_r6, err);
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__put_user_error(regs->ARM_r7, &sc->arm_r7, err);
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__put_user_error(regs->ARM_r8, &sc->arm_r8, err);
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__put_user_error(regs->ARM_r9, &sc->arm_r9, err);
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__put_user_error(regs->ARM_r10, &sc->arm_r10, err);
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__put_user_error(regs->ARM_fp, &sc->arm_fp, err);
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__put_user_error(regs->ARM_ip, &sc->arm_ip, err);
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__put_user_error(regs->ARM_sp, &sc->arm_sp, err);
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__put_user_error(regs->ARM_lr, &sc->arm_lr, err);
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__put_user_error(regs->ARM_pc, &sc->arm_pc, err);
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__put_user_error(regs->ARM_cpsr, &sc->arm_cpsr, err);
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__put_user_error(regs->ARM_r0, &sf->uc.uc_mcontext.arm_r0, err);
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__put_user_error(regs->ARM_r1, &sf->uc.uc_mcontext.arm_r1, err);
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__put_user_error(regs->ARM_r2, &sf->uc.uc_mcontext.arm_r2, err);
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__put_user_error(regs->ARM_r3, &sf->uc.uc_mcontext.arm_r3, err);
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__put_user_error(regs->ARM_r4, &sf->uc.uc_mcontext.arm_r4, err);
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__put_user_error(regs->ARM_r5, &sf->uc.uc_mcontext.arm_r5, err);
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__put_user_error(regs->ARM_r6, &sf->uc.uc_mcontext.arm_r6, err);
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__put_user_error(regs->ARM_r7, &sf->uc.uc_mcontext.arm_r7, err);
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__put_user_error(regs->ARM_r8, &sf->uc.uc_mcontext.arm_r8, err);
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__put_user_error(regs->ARM_r9, &sf->uc.uc_mcontext.arm_r9, err);
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__put_user_error(regs->ARM_r10, &sf->uc.uc_mcontext.arm_r10, err);
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__put_user_error(regs->ARM_fp, &sf->uc.uc_mcontext.arm_fp, err);
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__put_user_error(regs->ARM_ip, &sf->uc.uc_mcontext.arm_ip, err);
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__put_user_error(regs->ARM_sp, &sf->uc.uc_mcontext.arm_sp, err);
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__put_user_error(regs->ARM_lr, &sf->uc.uc_mcontext.arm_lr, err);
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__put_user_error(regs->ARM_pc, &sf->uc.uc_mcontext.arm_pc, err);
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__put_user_error(regs->ARM_cpsr, &sf->uc.uc_mcontext.arm_cpsr, err);
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__put_user_error(current->thread.trap_no, &sc->trap_no, err);
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__put_user_error(current->thread.error_code, &sc->error_code, err);
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__put_user_error(current->thread.address, &sc->fault_address, err);
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__put_user_error(mask, &sc->oldmask, err);
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__put_user_error(current->thread.trap_no, &sf->uc.uc_mcontext.trap_no, err);
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__put_user_error(current->thread.error_code, &sf->uc.uc_mcontext.error_code, err);
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__put_user_error(current->thread.address, &sf->uc.uc_mcontext.fault_address, err);
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__put_user_error(set->sig[0], &sf->uc.uc_mcontext.oldmask, err);
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err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(*set));
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aux = (struct aux_sigframe __user *) sf->uc.uc_regspace;
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#ifdef CONFIG_IWMMXT
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if (err == 0 && test_thread_flag(TIF_USING_IWMMXT))
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err |= preserve_iwmmxt_context(&aux->iwmmxt);
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#endif
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#ifdef CONFIG_VFP
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// if (err == 0)
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// err |= vfp_save_state(&aux->vfp);
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// err |= vfp_save_state(&sf->aux.vfp);
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#endif
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__put_user_error(0, &aux->end_magic, err);
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return err;
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}
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@ -487,13 +450,12 @@ setup_frame(int usig, struct k_sigaction *ka, sigset_t *set, struct pt_regs *reg
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if (!frame)
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return 1;
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err |= setup_sigcontext(&frame->sc, &frame->aux, regs, set->sig[0]);
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if (_NSIG_WORDS > 1) {
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err |= __copy_to_user(frame->extramask, &set->sig[1],
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sizeof(frame->extramask));
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}
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/*
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* Set uc.uc_flags to a value which sc.trap_no would never have.
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*/
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__put_user_error(0x5ac3c35a, &frame->uc.uc_flags, err);
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err |= setup_sigframe(frame, regs, set);
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if (err == 0)
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err = setup_return(regs, ka, frame->retcode, frame, usig);
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@ -511,25 +473,20 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
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if (!frame)
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return 1;
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__put_user_error(&frame->info, &frame->pinfo, err);
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__put_user_error(&frame->uc, &frame->puc, err);
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err |= copy_siginfo_to_user(&frame->info, info);
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__put_user_error(0, &frame->uc.uc_flags, err);
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__put_user_error(NULL, &frame->uc.uc_link, err);
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__put_user_error(0, &frame->sig.uc.uc_flags, err);
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__put_user_error(NULL, &frame->sig.uc.uc_link, err);
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memset(&stack, 0, sizeof(stack));
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stack.ss_sp = (void __user *)current->sas_ss_sp;
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stack.ss_flags = sas_ss_flags(regs->ARM_sp);
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stack.ss_size = current->sas_ss_size;
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err |= __copy_to_user(&frame->uc.uc_stack, &stack, sizeof(stack));
|
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|
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err |= setup_sigcontext(&frame->uc.uc_mcontext, &frame->aux,
|
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regs, set->sig[0]);
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err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
|
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err |= __copy_to_user(&frame->sig.uc.uc_stack, &stack, sizeof(stack));
|
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|
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err |= setup_sigframe(&frame->sig, regs, set);
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if (err == 0)
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err = setup_return(regs, ka, frame->retcode, frame, usig);
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err = setup_return(regs, ka, frame->sig.retcode, frame, usig);
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|
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if (err == 0) {
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/*
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@ -538,7 +495,7 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
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* -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06
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*/
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regs->ARM_r1 = (unsigned long)&frame->info;
|
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regs->ARM_r2 = (unsigned long)&frame->uc;
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regs->ARM_r2 = (unsigned long)&frame->sig.uc;
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}
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|
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return err;
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|
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@ -1,12 +1,89 @@
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#ifndef _ASMARM_UCONTEXT_H
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#define _ASMARM_UCONTEXT_H
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|
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#include <asm/fpstate.h>
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|
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/*
|
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* struct sigcontext only has room for the basic registers, but struct
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* ucontext now has room for all registers which need to be saved and
|
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* restored. Coprocessor registers are stored in uc_regspace. Each
|
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* coprocessor's saved state should start with a documented 32-bit magic
|
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* number, followed by a 32-bit word giving the coproccesor's saved size.
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* uc_regspace may be expanded if necessary, although this takes some
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* coordination with glibc.
|
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*/
|
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|
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struct ucontext {
|
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unsigned long uc_flags;
|
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struct ucontext *uc_link;
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stack_t uc_stack;
|
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struct sigcontext uc_mcontext;
|
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sigset_t uc_sigmask; /* mask last for extensibility */
|
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sigset_t uc_sigmask;
|
||||
/* Allow for uc_sigmask growth. Glibc uses a 1024-bit sigset_t. */
|
||||
int __unused[32 - (sizeof (sigset_t) / sizeof (int))];
|
||||
/* Last for extensibility. Eight byte aligned because some
|
||||
coprocessors require eight byte alignment. */
|
||||
unsigned long uc_regspace[128] __attribute__((__aligned__(8)));
|
||||
};
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
/*
|
||||
* Coprocessor save state. The magic values and specific
|
||||
* coprocessor's layouts are part of the userspace ABI. Each one of
|
||||
* these should be a multiple of eight bytes and aligned to eight
|
||||
* bytes, to prevent unpredictable padding in the signal frame.
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_IWMMXT
|
||||
/* iwmmxt_area is 0x98 bytes long, preceeded by 8 bytes of signature */
|
||||
#define IWMMXT_MAGIC 0x12ef842a
|
||||
#define IWMMXT_STORAGE_SIZE (IWMMXT_SIZE + 8)
|
||||
|
||||
struct iwmmxt_sigframe {
|
||||
unsigned long magic;
|
||||
unsigned long size;
|
||||
struct iwmmxt_struct storage;
|
||||
} __attribute__((__aligned__(8)));
|
||||
#endif /* CONFIG_IWMMXT */
|
||||
|
||||
#ifdef CONFIG_VFP
|
||||
#if __LINUX_ARM_ARCH__ < 6
|
||||
/* For ARM pre-v6, we use fstmiax and fldmiax. This adds one extra
|
||||
* word after the registers, and a word of padding at the end for
|
||||
* alignment. */
|
||||
#define VFP_MAGIC 0x56465001
|
||||
#define VFP_STORAGE_SIZE 152
|
||||
#else
|
||||
#define VFP_MAGIC 0x56465002
|
||||
#define VFP_STORAGE_SIZE 144
|
||||
#endif
|
||||
|
||||
struct vfp_sigframe
|
||||
{
|
||||
unsigned long magic;
|
||||
unsigned long size;
|
||||
union vfp_state storage;
|
||||
};
|
||||
#endif /* CONFIG_VFP */
|
||||
|
||||
/*
|
||||
* Auxiliary signal frame. This saves stuff like FP state.
|
||||
* The layout of this structure is not part of the user ABI,
|
||||
* because the config options aren't. uc_regspace is really
|
||||
* one of these.
|
||||
*/
|
||||
struct aux_sigframe {
|
||||
#ifdef CONFIG_IWMMXT
|
||||
struct iwmmxt_sigframe iwmmxt;
|
||||
#endif
|
||||
#if 0 && defined CONFIG_VFP /* Not yet saved. */
|
||||
struct vfp_sigframe vfp;
|
||||
#endif
|
||||
/* Something that isn't a valid magic number for any coprocessor. */
|
||||
unsigned long end_magic;
|
||||
} __attribute__((__aligned__(8)));
|
||||
|
||||
#endif
|
||||
|
||||
#endif /* !_ASMARM_UCONTEXT_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user