2 * Copyright (C) 2003 Broadcom Corporation
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 #include <linux/cache.h>
19 #include <linux/sched.h>
21 #include <linux/smp.h>
22 #include <linux/kernel.h>
23 #include <linux/signal.h>
24 #include <linux/errno.h>
25 #include <linux/wait.h>
26 #include <linux/ptrace.h>
27 #include <linux/unistd.h>
28 #include <linux/compat.h>
29 #include <linux/bitops.h>
33 #include <asm/cacheflush.h>
34 #include <asm/compat-signal.h>
36 #include <asm/uaccess.h>
37 #include <asm/ucontext.h>
39 #include <asm/cpu-features.h>
43 #include "signal-common.h"
46 * Including <asm/unistd.h> would give use the 64-bit syscall numbers ...
48 #define __NR_N32_restart_syscall 6214
50 extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *);
51 extern int restore_sigcontext(struct pt_regs *, struct sigcontext __user *);
54 /* IRIX compatible stack_t */
55 typedef struct sigaltstack32 {
57 compat_size_t ss_size;
65 struct sigcontext uc_mcontext;
66 compat_sigset_t uc_sigmask; /* mask last for extensibility */
69 struct rt_sigframe_n32 {
70 u32 rs_ass[4]; /* argument save space for o32 */
71 u32 rs_pad[2]; /* Was: signal trampoline */
72 struct compat_siginfo rs_info;
73 struct ucontextn32 rs_uc;
76 extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
78 asmlinkage int sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
80 compat_sigset_t __user *unewset;
85 /* XXX Don't preclude handling different sized sigset_t's. */
86 sigsetsize = regs.regs[5];
87 if (sigsetsize != sizeof(sigset_t))
90 unewset = (compat_sigset_t __user *) regs.regs[4];
91 if (copy_from_user(&uset, unewset, sizeof(uset)))
93 sigset_from_compat(&newset, &uset);
94 return sigsuspend(&newset);
97 asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
99 struct rt_sigframe_n32 __user *frame;
106 frame = (struct rt_sigframe_n32 __user *) regs.regs[29];
107 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
109 if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask))
112 sigdelsetmask(&set, ~_BLOCKABLE);
113 set_current_blocked(&set);
115 sig = restore_sigcontext(®s, &frame->rs_uc.uc_mcontext);
119 force_sig(sig, current);
121 /* The ucontext contains a stack32_t, so we must convert! */
122 if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp))
124 st.ss_sp = (void __user *)(long) sp;
125 if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size))
127 if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags))
130 /* It is more difficult to avoid calling this function than to
131 call it and ignore errors. */
134 do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]);
139 * Don't let your children do this ...
141 __asm__ __volatile__(
149 force_sig(SIGSEGV, current);
152 static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka,
153 struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info)
155 struct rt_sigframe_n32 __user *frame;
159 frame = get_sigframe(ka, regs, sizeof(*frame));
160 if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
163 /* Create siginfo. */
164 err |= copy_siginfo_to_user32(&frame->rs_info, info);
166 /* Create the ucontext. */
167 err |= __put_user(0, &frame->rs_uc.uc_flags);
168 err |= __put_user(0, &frame->rs_uc.uc_link);
169 sp = (int) (long) current->sas_ss_sp;
170 err |= __put_user(sp,
171 &frame->rs_uc.uc_stack.ss_sp);
172 err |= __put_user(sas_ss_flags(regs->regs[29]),
173 &frame->rs_uc.uc_stack.ss_flags);
174 err |= __put_user(current->sas_ss_size,
175 &frame->rs_uc.uc_stack.ss_size);
176 err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
177 err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
183 * Arguments to signal handler:
186 * a1 = 0 (should be cause)
187 * a2 = pointer to ucontext
189 * $25 and c0_epc point to the signal handler, $29 points to
190 * the struct rt_sigframe.
192 regs->regs[ 4] = signr;
193 regs->regs[ 5] = (unsigned long) &frame->rs_info;
194 regs->regs[ 6] = (unsigned long) &frame->rs_uc;
195 regs->regs[29] = (unsigned long) frame;
196 regs->regs[31] = (unsigned long) sig_return;
197 regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
199 DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
200 current->comm, current->pid,
201 frame, regs->cp0_epc, regs->regs[31]);
206 force_sigsegv(signr, current);
210 struct mips_abi mips_abi_n32 = {
211 .setup_rt_frame = setup_rt_frame_n32,
212 .rt_signal_return_offset =
213 offsetof(struct mips_vdso, n32_rt_signal_trampoline),
214 .restart = __NR_N32_restart_syscall