diff options
Diffstat (limited to 'sysdeps/mach/hurd/mips/sigreturn.c')
| -rw-r--r-- | sysdeps/mach/hurd/mips/sigreturn.c | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/sysdeps/mach/hurd/mips/sigreturn.c b/sysdeps/mach/hurd/mips/sigreturn.c deleted file mode 100644 index a9f7673eb5..0000000000 --- a/sysdeps/mach/hurd/mips/sigreturn.c +++ /dev/null @@ -1,223 +0,0 @@ -/* Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <hurd.h> -#include <hurd/signal.h> -#include <hurd/threadvar.h> -#include <stdlib.h> -#include <mach/mips/mips_instruction.h> - -int -__sigreturn (struct sigcontext *scp) -{ - struct hurd_sigstate *ss; - struct hurd_userlink *link = (void *) &scp[1]; - mach_port_t *reply_port; - - if (scp == NULL || (scp->sc_mask & _SIG_CANT_MASK)) - { - errno = EINVAL; - return -1; - } - - ss = _hurd_self_sigstate (); - __spin_lock (&ss->lock); - - /* Remove the link on the `active resources' chain added by - _hurd_setup_sighandler. Its purpose was to make sure - that we got called; now we have, it is done. */ - _hurd_userlink_unlink (link); - - /* Restore the set of blocked signals, and the intr_port slot. */ - ss->blocked = scp->sc_mask; - ss->intr_port = scp->sc_intr_port; - - /* Check for pending signals that were blocked by the old set. */ - if (ss->pending & ~ss->blocked) - { - /* There are pending signals that just became unblocked. Wake up the - signal thread to deliver them. But first, squirrel away SCP where - the signal thread will notice it if it runs another handler, and - arrange to have us called over again in the new reality. */ - ss->context = scp; - __spin_unlock (&ss->lock); - __msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ()); - /* If a pending signal was handled, sig_post never returned. */ - __spin_lock (&ss->lock); - ss->context = NULL; - } - - if (scp->sc_onstack) - { - ss->sigaltstack.ss_flags &= ~SS_ONSTACK; /* XXX threadvars */ - /* XXX cannot unlock until off sigstack */ - abort (); - } - else - __spin_unlock (&ss->lock); - - /* Destroy the MiG reply port used by the signal handler, and restore the - reply port in use by the thread when interrupted. */ - reply_port = - (mach_port_t *) __hurd_threadvar_location (_HURD_THREADVAR_MIG_REPLY); - if (*reply_port) - { - mach_port_t port = *reply_port; - - /* Assigning MACH_PORT_DEAD here tells libc's mig_get_reply_port not to - get another reply port, but avoids mig_dealloc_reply_port trying to - deallocate it after the receive fails (which it will, because the - reply port will be bogus, whether we do this or not). */ - *reply_port = MACH_PORT_DEAD; - - __mach_port_destroy (__mach_task_self (), port); - } - *reply_port = scp->sc_reply_port; - - if (scp->sc_coproc_used & SC_COPROC_USE_FPU) - { - /* Restore FPU state. */ -#define restore_fpr(n) \ - asm volatile ("l.d $f" #n ",%0" : : "m" (scp->sc_fpr[n])) - - /* Restore floating-point registers. */ -#ifdef __mips64 - restore_fpr (0); - restore_fpr (1); - restore_fpr (2); - restore_fpr (3); - restore_fpr (4); - restore_fpr (5); - restore_fpr (6); - restore_fpr (7); - restore_fpr (8); - restore_fpr (9); - restore_fpr (10); - restore_fpr (11); - restore_fpr (12); - restore_fpr (13); - restore_fpr (14); - restore_fpr (15); - restore_fpr (16); - restore_fpr (17); - restore_fpr (18); - restore_fpr (19); - restore_fpr (20); - restore_fpr (21); - restore_fpr (22); - restore_fpr (23); - restore_fpr (24); - restore_fpr (25); - restore_fpr (26); - restore_fpr (27); - restore_fpr (28); - restore_fpr (29); - restore_fpr (30); - restore_fpr (31); -#else - restore_fpr (0); - restore_fpr (2); - restore_fpr (4); - restore_fpr (6); - restore_fpr (8); - restore_fpr (10); - restore_fpr (12); - restore_fpr (14); - restore_fpr (16); - restore_fpr (18); - restore_fpr (20); - restore_fpr (22); - restore_fpr (24); - restore_fpr (26); - restore_fpr (28); - restore_fpr (30); -#endif - - /* Restore the floating-point control/status register ($f31). */ - asm volatile ("ctc1 %0,$f31" : : "r" (scp->sc_fpcsr)); - } - - /* Load all the registers from the sigcontext. */ -#ifdef __mips64 -#define restore_gpr(n) \ - asm volatile ("ld $" #n ",%0" : : "m" (scpreg->sc_gpr[n - 1])) -#else -#define restore_gpr(n) \ - asm volatile ("lw $" #n ",%0" : : "m" (scpreg->sc_gpr[n - 1])) -#endif - - { - register const struct sigcontext *const scpreg asm ("$1") = scp; - register int *at asm ("$1"); - - /* First restore the multiplication result registers. The compiler - will use some temporary registers, so we do this before restoring - the general registers. */ - asm volatile ("mtlo %0" : : "r" (scpreg->sc_mdlo)); - asm volatile ("mthi %0" : : "r" (scpreg->sc_mdhi)); - - /* In the word after the saved PC, store the saved $1 value. */ - (&scpreg->sc_pc)[1] = scpreg->sc_gpr[0]; - - asm volatile (".set noreorder; .set noat;"); - - /* Restore the normal registers. */ - restore_gpr (2); - restore_gpr (3); - restore_gpr (4); - restore_gpr (5); - restore_gpr (6); - restore_gpr (7); - restore_gpr (8); - restore_gpr (9); - restore_gpr (10); - restore_gpr (11); - restore_gpr (12); - restore_gpr (13); - restore_gpr (14); - restore_gpr (15); - restore_gpr (16); - restore_gpr (17); - restore_gpr (18); - restore_gpr (19); - restore_gpr (20); - restore_gpr (21); - restore_gpr (22); - restore_gpr (23); - restore_gpr (24); - restore_gpr (25); - /* Registers 26-27 are kernel-only. */ - restore_gpr (28); - restore_gpr (29); /* Stack pointer. */ - restore_gpr (30); /* Frame pointer. */ - restore_gpr (31); /* Return address. */ - - at = &scpreg->sc_pc; - /* This is an emulated instruction that will find at the address in $1 - two words: the PC value to restore, and the $1 value to restore. */ - asm volatile (".word %0" : : "i" (op_sigreturn)); - asm volatile (".set reorder; .set at;"); - /* NOTREACHED */ - return at; /* To prevent optimization. */ - } - - /* NOTREACHED */ - return -1; -} - -weak_alias (__sigreturn, sigreturn) |