Lines Matching +full:rx +full:- +full:sched +full:- +full:sp
1 // SPDX-License-Identifier: GPL-2.0
3 * linux/arch/parisc/kernel/signal.c: Architecture-specific signal
6 * Copyright (C) 2000 David Huggins-Daines <dhd@debian.org>
11 * Like the IA-64, we are a recent enough port (we are *starting*
12 * with glibc2.2) that we do not need to support the old non-realtime
16 #include <linux/sched.h>
17 #include <linux/sched/debug.h>
34 #include <asm/asm-offsets.h>
59 * Do a signal return - restore sigcontext.
75 err |= __copy_from_user(regs->gr, sc->sc_gr, sizeof(regs->gr)); in restore_sigcontext()
76 err |= __copy_from_user(regs->fr, sc->sc_fr, sizeof(regs->fr)); in restore_sigcontext()
77 err |= __copy_from_user(regs->iaoq, sc->sc_iaoq, sizeof(regs->iaoq)); in restore_sigcontext()
78 err |= __copy_from_user(regs->iasq, sc->sc_iasq, sizeof(regs->iasq)); in restore_sigcontext()
79 err |= __get_user(regs->sar, &sc->sc_sar); in restore_sigcontext()
81 regs->iaoq[0],regs->iaoq[1]); in restore_sigcontext()
82 DBG(2,"restore_sigcontext: r28 is %ld\n", regs->gr[28]); in restore_sigcontext()
91 unsigned long usp = (regs->gr[30] & ~(0x01UL)); in sys_rt_sigreturn()
100 current->restart_block.fn = do_no_restart_syscall; in sys_rt_sigreturn()
104 (usp - sigframe_size); in sys_rt_sigreturn()
107 regs->orig_r28 = 1; /* no restarts for sigreturn */ in sys_rt_sigreturn()
114 if (get_compat_sigset(&set, &compat_frame->uc.uc_sigmask)) in sys_rt_sigreturn()
119 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) in sys_rt_sigreturn()
128 DBG(1,"sys_rt_sigreturn: compat_frame->uc.uc_mcontext 0x%p\n", in sys_rt_sigreturn()
129 &compat_frame->uc.uc_mcontext); in sys_rt_sigreturn()
131 if (restore_sigcontext32(&compat_frame->uc.uc_mcontext, in sys_rt_sigreturn()
132 &compat_frame->regs, regs)) in sys_rt_sigreturn()
135 usp, &compat_frame->uc.uc_stack); in sys_rt_sigreturn()
136 if (compat_restore_altstack(&compat_frame->uc.uc_stack)) in sys_rt_sigreturn()
141 DBG(1,"sys_rt_sigreturn: frame->uc.uc_mcontext 0x%p\n", in sys_rt_sigreturn()
142 &frame->uc.uc_mcontext); in sys_rt_sigreturn()
143 if (restore_sigcontext(&frame->uc.uc_mcontext, regs)) in sys_rt_sigreturn()
146 usp, &frame->uc.uc_stack); in sys_rt_sigreturn()
147 if (restore_altstack(&frame->uc.uc_stack)) in sys_rt_sigreturn()
157 regs->gr[31] = regs->iaoq[0]; in sys_rt_sigreturn()
159 DBG(1,"sys_rt_sigreturn: returning to %#lx, DUMPING REGS:\n", regs->iaoq[0]); in sys_rt_sigreturn()
175 get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size) in get_sigframe() argument
180 DBG(1,"get_sigframe: ka = %#lx, sp = %#lx, frame_size = %#lx\n", in get_sigframe()
181 (unsigned long)ka, sp, frame_size); in get_sigframe()
185 if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! sas_ss_flags(sp)) in get_sigframe()
186 sp = (current->sas_ss_sp + 0x7f) & ~0x3f; /* Stacks grow up! */ in get_sigframe()
188 DBG(1,"get_sigframe: Returning sp = %#lx\n", (unsigned long)sp); in get_sigframe()
189 return (void __user *) sp; /* Stacks grow up. Fun. */ in get_sigframe()
203 /* regs->iaoq is undefined in the syscall return path */ in setup_sigcontext()
204 err |= __put_user(regs->gr[31], &sc->sc_iaoq[0]); in setup_sigcontext()
205 err |= __put_user(regs->gr[31]+4, &sc->sc_iaoq[1]); in setup_sigcontext()
206 err |= __put_user(regs->sr[3], &sc->sc_iasq[0]); in setup_sigcontext()
207 err |= __put_user(regs->sr[3], &sc->sc_iasq[1]); in setup_sigcontext()
209 regs->gr[31], regs->gr[31]+4); in setup_sigcontext()
211 err |= __copy_to_user(sc->sc_iaoq, regs->iaoq, sizeof(regs->iaoq)); in setup_sigcontext()
212 err |= __copy_to_user(sc->sc_iasq, regs->iasq, sizeof(regs->iasq)); in setup_sigcontext()
214 regs->iaoq[0], regs->iaoq[1]); in setup_sigcontext()
217 err |= __put_user(flags, &sc->sc_flags); in setup_sigcontext()
218 err |= __copy_to_user(sc->sc_gr, regs->gr, sizeof(regs->gr)); in setup_sigcontext()
219 err |= __copy_to_user(sc->sc_fr, regs->fr, sizeof(regs->fr)); in setup_sigcontext()
220 err |= __put_user(regs->sar, &sc->sc_sar); in setup_sigcontext()
221 DBG(1,"setup_sigcontext: r28 is %ld\n", regs->gr[28]); in setup_sigcontext()
239 usp = (regs->gr[30] & ~(0x01UL)); in setup_rt_frame()
241 frame = get_sigframe(&ksig->ka, usp, sizeof(*frame)); in setup_rt_frame()
244 DBG(1,"setup_rt_frame: frame %p info %p\n", frame, ksig->info); in setup_rt_frame()
252 DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &compat_frame->info); in setup_rt_frame()
253 err |= copy_siginfo_to_user32(&compat_frame->info, &ksig->info); in setup_rt_frame()
254 err |= __compat_save_altstack( &compat_frame->uc.uc_stack, regs->gr[30]); in setup_rt_frame()
255 DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &compat_frame->uc); in setup_rt_frame()
256 DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &compat_frame->uc.uc_mcontext); in setup_rt_frame()
257 err |= setup_sigcontext32(&compat_frame->uc.uc_mcontext, in setup_rt_frame()
258 &compat_frame->regs, regs, in_syscall); in setup_rt_frame()
259 err |= put_compat_sigset(&compat_frame->uc.uc_sigmask, set, in setup_rt_frame()
264 DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &frame->info); in setup_rt_frame()
265 err |= copy_siginfo_to_user(&frame->info, &ksig->info); in setup_rt_frame()
266 err |= __save_altstack(&frame->uc.uc_stack, regs->gr[30]); in setup_rt_frame()
267 DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &frame->uc); in setup_rt_frame()
268 DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &frame->uc.uc_mcontext); in setup_rt_frame()
269 err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, in_syscall); in setup_rt_frame()
271 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); in setup_rt_frame()
275 return -EFAULT; in setup_rt_frame()
283 &frame->tramp[SIGRESTARTBLOCK_TRAMP+0]); in setup_rt_frame()
285 &frame->tramp[SIGRESTARTBLOCK_TRAMP+1]); in setup_rt_frame()
287 &frame->tramp[SIGRESTARTBLOCK_TRAMP+2]); in setup_rt_frame()
288 err |= __put_user(INSN_NOP, &frame->tramp[SIGRESTARTBLOCK_TRAMP+3]); in setup_rt_frame()
296 sid, frame->tramp); in setup_rt_frame()
300 start = (unsigned long) &frame->tramp[0]; in setup_rt_frame()
301 end = (unsigned long) &frame->tramp[TRAMP_SIZE]; in setup_rt_frame()
305 /* TRAMP Words 0-4, Length 5 = SIGRESTARTBLOCK_TRAMP in setup_rt_frame()
306 * TRAMP Words 5-9, Length 4 = SIGRETURN_TRAMP in setup_rt_frame()
309 rp = (unsigned long) &frame->tramp[SIGRESTARTBLOCK_TRAMP]; in setup_rt_frame()
312 return -EFAULT; in setup_rt_frame()
314 haddr = A(ksig->ka.sa.sa_handler); in setup_rt_frame()
326 return -EFAULT; in setup_rt_frame()
329 regs->gr[19] = fdesc.gp; in setup_rt_frame()
339 return -EFAULT; in setup_rt_frame()
342 regs->gr[19] = fdesc.gp; in setup_rt_frame()
344 haddr, regs->gr[19], in_syscall); in setup_rt_frame()
356 regs->gr[31] = haddr; in setup_rt_frame()
369 when we return to userspace. Note the semantics -- we in setup_rt_frame()
372 http://sources.redhat.com/ml/gdb/2004-11/msg00245.html in setup_rt_frame()
374 if (pa_psw(current)->r) { in setup_rt_frame()
375 pa_psw(current)->r = 0; in setup_rt_frame()
377 mtctl(-1, 0); in setup_rt_frame()
380 regs->gr[0] = psw; in setup_rt_frame()
381 regs->iaoq[0] = haddr | 3; in setup_rt_frame()
382 regs->iaoq[1] = regs->iaoq[0] + 4; in setup_rt_frame()
385 regs->gr[2] = rp; /* userland return pointer */ in setup_rt_frame()
386 regs->gr[26] = ksig->sig; /* signal number */ in setup_rt_frame()
390 regs->gr[25] = A(&compat_frame->info); /* siginfo pointer */ in setup_rt_frame()
391 regs->gr[24] = A(&compat_frame->uc); /* ucontext pointer */ in setup_rt_frame()
395 regs->gr[25] = A(&frame->info); /* siginfo pointer */ in setup_rt_frame()
396 regs->gr[24] = A(&frame->uc); /* ucontext pointer */ in setup_rt_frame()
400 regs->gr[30], sigframe_size, in setup_rt_frame()
401 regs->gr[30] + sigframe_size); in setup_rt_frame()
403 regs->gr[30] = (A(frame) + sigframe_size); in setup_rt_frame()
406 DBG(1,"setup_rt_frame: sig deliver (%s,%d) frame=0x%p sp=%#lx iaoq=%#lx/%#lx rp=%#lx\n", in setup_rt_frame()
407 current->comm, current->pid, frame, regs->gr[30], in setup_rt_frame()
408 regs->iaoq[0], regs->iaoq[1], rp); in setup_rt_frame()
424 ksig->sig, ksig->ka, ksig->info, oldset, regs); in handle_signal()
432 DBG(1,KERN_DEBUG "do_signal: Exit (success), regs->gr[28] = %ld\n", in handle_signal()
433 regs->gr[28]); in handle_signal()
450 * In some cases a register-to-register copy instruction might have in check_syscallno_in_delay_branch()
458 regs->gr[31] -= 8; /* delayed branching */ in check_syscallno_in_delay_branch()
461 uaddr = (unsigned int *) ((regs->gr[31] & ~3) + 4); in check_syscallno_in_delay_branch()
474 /* Check if delay branch uses "copy %rX,%r20" */ in check_syscallno_in_delay_branch()
477 regs->gr[source_reg] = regs->gr[20]; in check_syscallno_in_delay_branch()
482 current->comm, task_pid_nr(current), opcode); in check_syscallno_in_delay_branch()
488 if (regs->orig_r28) in syscall_restart()
490 regs->orig_r28 = 1; /* no more restarts */ in syscall_restart()
492 switch (regs->gr[28]) { in syscall_restart()
493 case -ERESTART_RESTARTBLOCK: in syscall_restart()
494 case -ERESTARTNOHAND: in syscall_restart()
495 DBG(1,"ERESTARTNOHAND: returning -EINTR\n"); in syscall_restart()
496 regs->gr[28] = -EINTR; in syscall_restart()
499 case -ERESTARTSYS: in syscall_restart()
500 if (!(ka->sa.sa_flags & SA_RESTART)) { in syscall_restart()
501 DBG(1,"ERESTARTSYS: putting -EINTR\n"); in syscall_restart()
502 regs->gr[28] = -EINTR; in syscall_restart()
506 case -ERESTARTNOINTR: in syscall_restart()
515 if (regs->orig_r28) in insert_restart_trampoline()
517 regs->orig_r28 = 1; /* no more restarts */ in insert_restart_trampoline()
518 switch(regs->gr[28]) { in insert_restart_trampoline()
519 case -ERESTART_RESTARTBLOCK: { in insert_restart_trampoline()
520 /* Restart the system call - no handlers present */ in insert_restart_trampoline()
521 unsigned int *usp = (unsigned int *)regs->gr[30]; in insert_restart_trampoline()
530 * 4: <2nd half for 64-bit> in insert_restart_trampoline()
531 * 8: ldw 0(%sp), %r31 in insert_restart_trampoline()
536 err |= put_user(regs->gr[31] >> 32, &usp[0]); in insert_restart_trampoline()
537 err |= put_user(regs->gr[31] & 0xffffffff, &usp[1]); in insert_restart_trampoline()
540 err |= put_user(regs->gr[31], &usp[0]); in insert_restart_trampoline()
552 regs->gr[31] = regs->gr[30] + 8; in insert_restart_trampoline()
555 case -ERESTARTNOHAND: in insert_restart_trampoline()
556 case -ERESTARTSYS: in insert_restart_trampoline()
557 case -ERESTARTNOINTR: in insert_restart_trampoline()
570 * We need to be able to restore the syscall arguments (r21-r26) to
572 * pt_regs structure (it's okay to do so since they are caller-save
582 regs, regs->sr[7], in_syscall); in do_signal()
585 DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]); in do_signal()
598 DBG(1,"do_signal: Exit (not delivered), regs->gr[28] = %ld\n", in do_signal()
599 regs->gr[28]); in do_signal()