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https://mirrors.bfsu.edu.cn/git/linux.git
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sparc: convert to ksignal
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
parent
7e243643df
commit
08f739570d
@ -323,7 +323,7 @@ static int invalid_frame_pointer(void __user *fp, int fplen)
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return 0;
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}
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static void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize)
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static void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, unsigned long framesize)
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{
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unsigned long sp;
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@ -338,12 +338,7 @@ static void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, uns
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return (void __user *) -1L;
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/* This is the X/Open sanctioned signal stack switching. */
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if (sa->sa_flags & SA_ONSTACK) {
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if (sas_ss_flags(sp) == 0)
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sp = current->sas_ss_sp + current->sas_ss_size;
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}
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sp -= framesize;
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sp = sigsp(sp, ksig) - framesize;
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/* Always align the stack frame. This handles two cases. First,
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* sigaltstack need not be mindful of platform specific stack
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@ -414,8 +409,8 @@ out_irqs_on:
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}
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static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
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int signo, sigset_t *oldset)
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static int setup_frame32(struct ksignal *ksig, struct pt_regs *regs,
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sigset_t *oldset)
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{
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struct signal_frame32 __user *sf;
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int i, err, wsaved;
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@ -437,10 +432,12 @@ static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
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sigframe_size += sizeof(__siginfo_rwin_t);
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sf = (struct signal_frame32 __user *)
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get_sigframe(&ka->sa, regs, sigframe_size);
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get_sigframe(ksig, regs, sigframe_size);
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if (invalid_frame_pointer(sf, sigframe_size))
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goto sigill;
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if (invalid_frame_pointer(sf, sigframe_size)) {
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do_exit(SIGILL);
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return -EINVAL;
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}
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tail = (sf + 1);
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@ -514,16 +511,16 @@ static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
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err |= __put_user(rp->ins[7], &sf->ss.callers_pc);
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}
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if (err)
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goto sigsegv;
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return err;
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/* 3. signal handler back-trampoline and parameters */
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regs->u_regs[UREG_FP] = (unsigned long) sf;
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regs->u_regs[UREG_I0] = signo;
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regs->u_regs[UREG_I0] = ksig->sig;
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regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
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regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
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/* 4. signal handler */
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regs->tpc = (unsigned long) ka->sa.sa_handler;
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regs->tpc = (unsigned long) ksig->ka.sa.sa_handler;
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regs->tnpc = (regs->tpc + 4);
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if (test_thread_flag(TIF_32BIT)) {
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regs->tpc &= 0xffffffff;
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@ -531,8 +528,8 @@ static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
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}
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/* 5. return to kernel instructions */
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if (ka->ka_restorer) {
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regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
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if (ksig->ka.ka_restorer) {
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regs->u_regs[UREG_I7] = (unsigned long)ksig->ka.ka_restorer;
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} else {
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unsigned long address = ((unsigned long)&(sf->insns[0]));
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@ -541,23 +538,14 @@ static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
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err = __put_user(0x821020d8, &sf->insns[0]); /*mov __NR_sigreturn, %g1*/
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err |= __put_user(0x91d02010, &sf->insns[1]); /*t 0x10*/
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if (err)
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goto sigsegv;
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return err;
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flush_signal_insns(address);
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}
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return 0;
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sigill:
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do_exit(SIGILL);
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return -EINVAL;
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sigsegv:
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force_sigsegv(signo, current);
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return -EFAULT;
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}
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static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
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unsigned long signr, sigset_t *oldset,
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siginfo_t *info)
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static int setup_rt_frame32(struct ksignal *ksig, struct pt_regs *regs,
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sigset_t *oldset)
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{
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struct rt_signal_frame32 __user *sf;
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int i, err, wsaved;
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@ -579,10 +567,12 @@ static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
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sigframe_size += sizeof(__siginfo_rwin_t);
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sf = (struct rt_signal_frame32 __user *)
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get_sigframe(&ka->sa, regs, sigframe_size);
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get_sigframe(ksig, regs, sigframe_size);
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if (invalid_frame_pointer(sf, sigframe_size))
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goto sigill;
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if (invalid_frame_pointer(sf, sigframe_size)) {
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do_exit(SIGILL);
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return -EINVAL;
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}
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tail = (sf + 1);
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@ -627,7 +617,7 @@ static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
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}
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/* Update the siginfo structure. */
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err |= copy_siginfo_to_user32(&sf->info, info);
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err |= copy_siginfo_to_user32(&sf->info, &ksig->info);
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/* Setup sigaltstack */
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err |= __compat_save_altstack(&sf->stack, regs->u_regs[UREG_FP]);
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@ -660,16 +650,16 @@ static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
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err |= __put_user(rp->ins[7], &sf->ss.callers_pc);
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}
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if (err)
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goto sigsegv;
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return err;
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/* 3. signal handler back-trampoline and parameters */
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regs->u_regs[UREG_FP] = (unsigned long) sf;
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regs->u_regs[UREG_I0] = signr;
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regs->u_regs[UREG_I0] = ksig->sig;
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regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
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regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
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/* 4. signal handler */
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regs->tpc = (unsigned long) ka->sa.sa_handler;
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regs->tpc = (unsigned long) ksig->ka.sa.sa_handler;
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regs->tnpc = (regs->tpc + 4);
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if (test_thread_flag(TIF_32BIT)) {
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regs->tpc &= 0xffffffff;
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@ -677,8 +667,8 @@ static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
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}
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/* 5. return to kernel instructions */
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if (ka->ka_restorer)
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regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
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if (ksig->ka.ka_restorer)
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regs->u_regs[UREG_I7] = (unsigned long)ksig->ka.ka_restorer;
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else {
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unsigned long address = ((unsigned long)&(sf->insns[0]));
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@ -690,36 +680,25 @@ static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
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/* t 0x10 */
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err |= __put_user(0x91d02010, &sf->insns[1]);
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if (err)
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goto sigsegv;
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return err;
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flush_signal_insns(address);
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}
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return 0;
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sigill:
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do_exit(SIGILL);
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return -EINVAL;
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sigsegv:
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force_sigsegv(signr, current);
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return -EFAULT;
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}
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static inline void handle_signal32(unsigned long signr, struct k_sigaction *ka,
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siginfo_t *info,
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sigset_t *oldset, struct pt_regs *regs)
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static inline void handle_signal32(struct ksignal *ksig,
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struct pt_regs *regs)
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{
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sigset_t *oldset = sigmask_to_save();
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int err;
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if (ka->sa.sa_flags & SA_SIGINFO)
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err = setup_rt_frame32(ka, regs, signr, oldset, info);
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if (ksig->ka.sa.sa_flags & SA_SIGINFO)
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err = setup_rt_frame32(ksig, regs, oldset);
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else
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err = setup_frame32(ka, regs, signr, oldset);
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err = setup_frame32(ksig, regs, oldset);
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if (err)
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return;
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signal_delivered(signr, info, ka, regs, 0);
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signal_setup_done(err, ksig, 0);
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}
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static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs,
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@ -749,50 +728,41 @@ static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs
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*/
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void do_signal32(sigset_t *oldset, struct pt_regs * regs)
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{
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struct k_sigaction ka;
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unsigned long orig_i0;
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int restart_syscall;
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siginfo_t info;
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int signr;
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struct ksignal ksig;
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unsigned long orig_i0 = 0;
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int restart_syscall = 0;
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bool has_handler = get_signal(&ksig);
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signr = get_signal_to_deliver(&info, &ka, regs, NULL);
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restart_syscall = 0;
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orig_i0 = 0;
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if (pt_regs_is_syscall(regs) &&
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(regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY))) {
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restart_syscall = 1;
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orig_i0 = regs->u_regs[UREG_G6];
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}
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if (signr > 0) {
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if (has_handler) {
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if (restart_syscall)
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syscall_restart32(orig_i0, regs, &ka.sa);
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handle_signal32(signr, &ka, &info, oldset, regs);
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return;
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syscall_restart32(orig_i0, regs, &ksig.ka.sa);
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handle_signal32(&ksig, regs);
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} else {
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if (restart_syscall) {
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switch (regs->u_regs[UREG_I0]) {
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case ERESTARTNOHAND:
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case ERESTARTSYS:
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case ERESTARTNOINTR:
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/* replay the system call when we are done */
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regs->u_regs[UREG_I0] = orig_i0;
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regs->tpc -= 4;
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regs->tnpc -= 4;
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pt_regs_clear_syscall(regs);
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case ERESTART_RESTARTBLOCK:
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regs->u_regs[UREG_G1] = __NR_restart_syscall;
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regs->tpc -= 4;
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regs->tnpc -= 4;
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pt_regs_clear_syscall(regs);
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}
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}
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restore_saved_sigmask();
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}
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if (restart_syscall &&
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(regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
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regs->u_regs[UREG_I0] == ERESTARTSYS ||
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regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
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/* replay the system call when we are done */
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regs->u_regs[UREG_I0] = orig_i0;
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regs->tpc -= 4;
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regs->tnpc -= 4;
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pt_regs_clear_syscall(regs);
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}
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if (restart_syscall &&
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regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
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regs->u_regs[UREG_G1] = __NR_restart_syscall;
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regs->tpc -= 4;
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regs->tnpc -= 4;
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pt_regs_clear_syscall(regs);
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}
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/* If there's no signal to deliver, we just put the saved sigmask
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* back
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*/
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restore_saved_sigmask();
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}
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struct sigstack32 {
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@ -186,7 +186,7 @@ static inline int invalid_frame_pointer(void __user *fp, int fplen)
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return 0;
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}
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static inline void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize)
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static inline void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, unsigned long framesize)
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{
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unsigned long sp = regs->u_regs[UREG_FP];
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@ -198,12 +198,7 @@ static inline void __user *get_sigframe(struct sigaction *sa, struct pt_regs *re
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return (void __user *) -1L;
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/* This is the X/Open sanctioned signal stack switching. */
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if (sa->sa_flags & SA_ONSTACK) {
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if (sas_ss_flags(sp) == 0)
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sp = current->sas_ss_sp + current->sas_ss_size;
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}
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sp -= framesize;
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sp = sigsp(sp, ksig) - framesize;
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/* Always align the stack frame. This handles two cases. First,
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* sigaltstack need not be mindful of platform specific stack
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@ -216,8 +211,8 @@ static inline void __user *get_sigframe(struct sigaction *sa, struct pt_regs *re
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return (void __user *) sp;
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}
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static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
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int signo, sigset_t *oldset)
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static int setup_frame(struct ksignal *ksig, struct pt_regs *regs,
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sigset_t *oldset)
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{
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struct signal_frame __user *sf;
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int sigframe_size, err, wsaved;
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@ -235,10 +230,12 @@ static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
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sigframe_size += sizeof(__siginfo_rwin_t);
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sf = (struct signal_frame __user *)
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get_sigframe(&ka->sa, regs, sigframe_size);
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get_sigframe(ksig, regs, sigframe_size);
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if (invalid_frame_pointer(sf, sigframe_size))
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goto sigill_and_return;
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if (invalid_frame_pointer(sf, sigframe_size)) {
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do_exit(SIGILL);
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return -EINVAL;
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}
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tail = sf + 1;
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@ -277,21 +274,21 @@ static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
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err |= __copy_to_user(sf, rp, sizeof(struct reg_window32));
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}
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if (err)
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goto sigsegv;
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return err;
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/* 3. signal handler back-trampoline and parameters */
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regs->u_regs[UREG_FP] = (unsigned long) sf;
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regs->u_regs[UREG_I0] = signo;
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regs->u_regs[UREG_I0] = ksig->sig;
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regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
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regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
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/* 4. signal handler */
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regs->pc = (unsigned long) ka->sa.sa_handler;
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regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
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regs->npc = (regs->pc + 4);
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/* 5. return to kernel instructions */
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if (ka->ka_restorer)
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regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
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if (ksig->ka.ka_restorer)
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regs->u_regs[UREG_I7] = (unsigned long)ksig->ka.ka_restorer;
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else {
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regs->u_regs[UREG_I7] = (unsigned long)(&(sf->insns[0]) - 2);
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@ -301,24 +298,16 @@ static int setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
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/* t 0x10 */
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err |= __put_user(0x91d02010, &sf->insns[1]);
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if (err)
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goto sigsegv;
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return err;
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/* Flush instruction space. */
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flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
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}
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return 0;
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sigill_and_return:
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do_exit(SIGILL);
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return -EINVAL;
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sigsegv:
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force_sigsegv(signo, current);
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return -EFAULT;
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}
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static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
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int signo, sigset_t *oldset, siginfo_t *info)
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static int setup_rt_frame(struct ksignal *ksig, struct pt_regs *regs,
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sigset_t *oldset)
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{
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struct rt_signal_frame __user *sf;
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int sigframe_size, wsaved;
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@ -334,9 +323,11 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
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if (wsaved)
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sigframe_size += sizeof(__siginfo_rwin_t);
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sf = (struct rt_signal_frame __user *)
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get_sigframe(&ka->sa, regs, sigframe_size);
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if (invalid_frame_pointer(sf, sigframe_size))
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goto sigill;
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get_sigframe(ksig, regs, sigframe_size);
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if (invalid_frame_pointer(sf, sigframe_size)) {
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do_exit(SIGILL);
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return -EINVAL;
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}
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tail = sf + 1;
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err = __put_user(regs->pc, &sf->regs.pc);
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@ -380,21 +371,21 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
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err |= __copy_to_user(sf, rp, sizeof(struct reg_window32));
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}
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err |= copy_siginfo_to_user(&sf->info, info);
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err |= copy_siginfo_to_user(&sf->info, &ksig->info);
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if (err)
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goto sigsegv;
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return err;
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regs->u_regs[UREG_FP] = (unsigned long) sf;
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regs->u_regs[UREG_I0] = signo;
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regs->u_regs[UREG_I0] = ksig->sig;
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regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
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regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
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regs->pc = (unsigned long) ka->sa.sa_handler;
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regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
|
||||
regs->npc = (regs->pc + 4);
|
||||
|
||||
if (ka->ka_restorer)
|
||||
regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
|
||||
if (ksig->ka.ka_restorer)
|
||||
regs->u_regs[UREG_I7] = (unsigned long)ksig->ka.ka_restorer;
|
||||
else {
|
||||
regs->u_regs[UREG_I7] = (unsigned long)(&(sf->insns[0]) - 2);
|
||||
|
||||
@ -404,38 +395,25 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
|
||||
/* t 0x10 */
|
||||
err |= __put_user(0x91d02010, &sf->insns[1]);
|
||||
if (err)
|
||||
goto sigsegv;
|
||||
return err;
|
||||
|
||||
/* Flush instruction space. */
|
||||
flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
|
||||
}
|
||||
return 0;
|
||||
|
||||
sigill:
|
||||
do_exit(SIGILL);
|
||||
return -EINVAL;
|
||||
|
||||
sigsegv:
|
||||
force_sigsegv(signo, current);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
static inline void
|
||||
handle_signal(unsigned long signr, struct k_sigaction *ka,
|
||||
siginfo_t *info, struct pt_regs *regs)
|
||||
handle_signal(struct ksignal *ksig, struct pt_regs *regs)
|
||||
{
|
||||
sigset_t *oldset = sigmask_to_save();
|
||||
int err;
|
||||
|
||||
if (ka->sa.sa_flags & SA_SIGINFO)
|
||||
err = setup_rt_frame(ka, regs, signr, oldset, info);
|
||||
if (ksig->ka.sa.sa_flags & SA_SIGINFO)
|
||||
err = setup_rt_frame(ksig, regs, oldset);
|
||||
else
|
||||
err = setup_frame(ka, regs, signr, oldset);
|
||||
|
||||
if (err)
|
||||
return;
|
||||
|
||||
signal_delivered(signr, info, ka, regs, 0);
|
||||
err = setup_frame(ksig, regs, oldset);
|
||||
signal_setup_done(err, ksig, 0);
|
||||
}
|
||||
|
||||
static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
|
||||
@ -465,10 +443,9 @@ static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
|
||||
*/
|
||||
static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
|
||||
{
|
||||
struct k_sigaction ka;
|
||||
struct ksignal ksig;
|
||||
int restart_syscall;
|
||||
siginfo_t info;
|
||||
int signr;
|
||||
bool has_handler;
|
||||
|
||||
/* It's a lot of work and synchronization to add a new ptrace
|
||||
* register for GDB to save and restore in order to get
|
||||
@ -491,7 +468,7 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
|
||||
if (pt_regs_is_syscall(regs) && (regs->psr & PSR_C))
|
||||
regs->u_regs[UREG_G6] = orig_i0;
|
||||
|
||||
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
|
||||
has_handler = get_signal(&ksig);
|
||||
|
||||
/* If the debugger messes with the program counter, it clears
|
||||
* the software "in syscall" bit, directing us to not perform
|
||||
@ -503,35 +480,30 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
|
||||
orig_i0 = regs->u_regs[UREG_G6];
|
||||
}
|
||||
|
||||
|
||||
if (signr > 0) {
|
||||
if (has_handler) {
|
||||
if (restart_syscall)
|
||||
syscall_restart(orig_i0, regs, &ka.sa);
|
||||
handle_signal(signr, &ka, &info, regs);
|
||||
return;
|
||||
syscall_restart(orig_i0, regs, &ksig.ka.sa);
|
||||
handle_signal(&ksig, regs);
|
||||
} else {
|
||||
if (restart_syscall) {
|
||||
switch (regs->u_regs[UREG_I0]) {
|
||||
case ERESTARTNOHAND:
|
||||
case ERESTARTSYS:
|
||||
case ERESTARTNOINTR:
|
||||
/* replay the system call when we are done */
|
||||
regs->u_regs[UREG_I0] = orig_i0;
|
||||
regs->pc -= 4;
|
||||
regs->npc -= 4;
|
||||
pt_regs_clear_syscall(regs);
|
||||
case ERESTART_RESTARTBLOCK:
|
||||
regs->u_regs[UREG_G1] = __NR_restart_syscall;
|
||||
regs->pc -= 4;
|
||||
regs->npc -= 4;
|
||||
pt_regs_clear_syscall(regs);
|
||||
}
|
||||
}
|
||||
restore_saved_sigmask();
|
||||
}
|
||||
if (restart_syscall &&
|
||||
(regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
|
||||
regs->u_regs[UREG_I0] == ERESTARTSYS ||
|
||||
regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
|
||||
/* replay the system call when we are done */
|
||||
regs->u_regs[UREG_I0] = orig_i0;
|
||||
regs->pc -= 4;
|
||||
regs->npc -= 4;
|
||||
pt_regs_clear_syscall(regs);
|
||||
}
|
||||
if (restart_syscall &&
|
||||
regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
|
||||
regs->u_regs[UREG_G1] = __NR_restart_syscall;
|
||||
regs->pc -= 4;
|
||||
regs->npc -= 4;
|
||||
pt_regs_clear_syscall(regs);
|
||||
}
|
||||
|
||||
/* if there's no signal to deliver, we just put the saved sigmask
|
||||
* back
|
||||
*/
|
||||
restore_saved_sigmask();
|
||||
}
|
||||
|
||||
void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0,
|
||||
|
||||
@ -308,7 +308,7 @@ static int invalid_frame_pointer(void __user *fp)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, unsigned long framesize)
|
||||
static inline void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, unsigned long framesize)
|
||||
{
|
||||
unsigned long sp = regs->u_regs[UREG_FP] + STACK_BIAS;
|
||||
|
||||
@ -320,12 +320,7 @@ static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *
|
||||
return (void __user *) -1L;
|
||||
|
||||
/* This is the X/Open sanctioned signal stack switching. */
|
||||
if (ka->sa.sa_flags & SA_ONSTACK) {
|
||||
if (sas_ss_flags(sp) == 0)
|
||||
sp = current->sas_ss_sp + current->sas_ss_size;
|
||||
}
|
||||
|
||||
sp -= framesize;
|
||||
sp = sigsp(sp, ksig) - framesize;
|
||||
|
||||
/* Always align the stack frame. This handles two cases. First,
|
||||
* sigaltstack need not be mindful of platform specific stack
|
||||
@ -339,8 +334,7 @@ static inline void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *
|
||||
}
|
||||
|
||||
static inline int
|
||||
setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
|
||||
int signo, sigset_t *oldset, siginfo_t *info)
|
||||
setup_rt_frame(struct ksignal *ksig, struct pt_regs *regs)
|
||||
{
|
||||
struct rt_signal_frame __user *sf;
|
||||
int wsaved, err, sf_size;
|
||||
@ -358,10 +352,12 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
|
||||
if (wsaved)
|
||||
sf_size += sizeof(__siginfo_rwin_t);
|
||||
sf = (struct rt_signal_frame __user *)
|
||||
get_sigframe(ka, regs, sf_size);
|
||||
get_sigframe(ksig, regs, sf_size);
|
||||
|
||||
if (invalid_frame_pointer (sf))
|
||||
goto sigill;
|
||||
if (invalid_frame_pointer (sf)) {
|
||||
do_exit(SIGILL); /* won't return, actually */
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
tail = (sf + 1);
|
||||
|
||||
@ -389,7 +385,7 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
|
||||
/* Setup sigaltstack */
|
||||
err |= __save_altstack(&sf->stack, regs->u_regs[UREG_FP]);
|
||||
|
||||
err |= copy_to_user(&sf->mask, oldset, sizeof(sigset_t));
|
||||
err |= copy_to_user(&sf->mask, sigmask_to_save(), sizeof(sigset_t));
|
||||
|
||||
if (!wsaved) {
|
||||
err |= copy_in_user((u64 __user *)sf,
|
||||
@ -402,18 +398,18 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
|
||||
rp = ¤t_thread_info()->reg_window[wsaved - 1];
|
||||
err |= copy_to_user(sf, rp, sizeof(struct reg_window));
|
||||
}
|
||||
if (info)
|
||||
err |= copy_siginfo_to_user(&sf->info, info);
|
||||
if (ksig->ka.sa.sa_flags & SA_SIGINFO)
|
||||
err |= copy_siginfo_to_user(&sf->info, &ksig->info);
|
||||
else {
|
||||
err |= __put_user(signo, &sf->info.si_signo);
|
||||
err |= __put_user(ksig->sig, &sf->info.si_signo);
|
||||
err |= __put_user(SI_NOINFO, &sf->info.si_code);
|
||||
}
|
||||
if (err)
|
||||
goto sigsegv;
|
||||
return err;
|
||||
|
||||
/* 3. signal handler back-trampoline and parameters */
|
||||
regs->u_regs[UREG_FP] = ((unsigned long) sf) - STACK_BIAS;
|
||||
regs->u_regs[UREG_I0] = signo;
|
||||
regs->u_regs[UREG_I0] = ksig->sig;
|
||||
regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
|
||||
|
||||
/* The sigcontext is passed in this way because of how it
|
||||
@ -423,37 +419,15 @@ setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
|
||||
regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
|
||||
|
||||
/* 5. signal handler */
|
||||
regs->tpc = (unsigned long) ka->sa.sa_handler;
|
||||
regs->tpc = (unsigned long) ksig->ka.sa.sa_handler;
|
||||
regs->tnpc = (regs->tpc + 4);
|
||||
if (test_thread_flag(TIF_32BIT)) {
|
||||
regs->tpc &= 0xffffffff;
|
||||
regs->tnpc &= 0xffffffff;
|
||||
}
|
||||
/* 4. return to kernel instructions */
|
||||
regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
|
||||
regs->u_regs[UREG_I7] = (unsigned long)ksig->ka.ka_restorer;
|
||||
return 0;
|
||||
|
||||
sigill:
|
||||
do_exit(SIGILL);
|
||||
return -EINVAL;
|
||||
|
||||
sigsegv:
|
||||
force_sigsegv(signo, current);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
static inline void handle_signal(unsigned long signr, struct k_sigaction *ka,
|
||||
siginfo_t *info,
|
||||
sigset_t *oldset, struct pt_regs *regs)
|
||||
{
|
||||
int err;
|
||||
|
||||
err = setup_rt_frame(ka, regs, signr, oldset,
|
||||
(ka->sa.sa_flags & SA_SIGINFO) ? info : NULL);
|
||||
if (err)
|
||||
return;
|
||||
|
||||
signal_delivered(signr, info, ka, regs, 0);
|
||||
}
|
||||
|
||||
static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
|
||||
@ -483,11 +457,9 @@ static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
|
||||
*/
|
||||
static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
|
||||
{
|
||||
struct k_sigaction ka;
|
||||
struct ksignal ksig;
|
||||
int restart_syscall;
|
||||
sigset_t *oldset = sigmask_to_save();
|
||||
siginfo_t info;
|
||||
int signr;
|
||||
bool has_handler;
|
||||
|
||||
/* It's a lot of work and synchronization to add a new ptrace
|
||||
* register for GDB to save and restore in order to get
|
||||
@ -513,13 +485,13 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
|
||||
|
||||
#ifdef CONFIG_COMPAT
|
||||
if (test_thread_flag(TIF_32BIT)) {
|
||||
extern void do_signal32(sigset_t *, struct pt_regs *);
|
||||
do_signal32(oldset, regs);
|
||||
extern void do_signal32(struct pt_regs *);
|
||||
do_signal32(regs);
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
|
||||
has_handler = get_signal(&ksig);
|
||||
|
||||
restart_syscall = 0;
|
||||
if (pt_regs_is_syscall(regs) &&
|
||||
@ -528,34 +500,30 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
|
||||
orig_i0 = regs->u_regs[UREG_G6];
|
||||
}
|
||||
|
||||
if (signr > 0) {
|
||||
if (has_handler) {
|
||||
if (restart_syscall)
|
||||
syscall_restart(orig_i0, regs, &ka.sa);
|
||||
handle_signal(signr, &ka, &info, oldset, regs);
|
||||
return;
|
||||
syscall_restart(orig_i0, regs, &ksig.ka.sa);
|
||||
signal_setup_done(setup_rt_frame(&ksig, regs), &ksig, 0);
|
||||
} else {
|
||||
if (restart_syscall) {
|
||||
switch (regs->u_regs[UREG_I0]) {
|
||||
case ERESTARTNOHAND:
|
||||
case ERESTARTSYS:
|
||||
case ERESTARTNOINTR:
|
||||
/* replay the system call when we are done */
|
||||
regs->u_regs[UREG_I0] = orig_i0;
|
||||
regs->tpc -= 4;
|
||||
regs->tnpc -= 4;
|
||||
pt_regs_clear_syscall(regs);
|
||||
case ERESTART_RESTARTBLOCK:
|
||||
regs->u_regs[UREG_G1] = __NR_restart_syscall;
|
||||
regs->tpc -= 4;
|
||||
regs->tnpc -= 4;
|
||||
pt_regs_clear_syscall(regs);
|
||||
}
|
||||
}
|
||||
restore_saved_sigmask();
|
||||
}
|
||||
if (restart_syscall &&
|
||||
(regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
|
||||
regs->u_regs[UREG_I0] == ERESTARTSYS ||
|
||||
regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
|
||||
/* replay the system call when we are done */
|
||||
regs->u_regs[UREG_I0] = orig_i0;
|
||||
regs->tpc -= 4;
|
||||
regs->tnpc -= 4;
|
||||
pt_regs_clear_syscall(regs);
|
||||
}
|
||||
if (restart_syscall &&
|
||||
regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
|
||||
regs->u_regs[UREG_G1] = __NR_restart_syscall;
|
||||
regs->tpc -= 4;
|
||||
regs->tnpc -= 4;
|
||||
pt_regs_clear_syscall(regs);
|
||||
}
|
||||
|
||||
/* If there's no signal to deliver, we just put the saved sigmask
|
||||
* back
|
||||
*/
|
||||
restore_saved_sigmask();
|
||||
}
|
||||
|
||||
void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long thread_info_flags)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user