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 *);
56 compat_stack_t uc_stack;
57 struct sigcontext uc_mcontext;
58 compat_sigset_t uc_sigmask; /* mask last for extensibility */
61 struct rt_sigframe_n32 {
62 u32 rs_ass[4]; /* argument save space for o32 */
63 u32 rs_pad[2]; /* Was: signal trampoline */
64 struct compat_siginfo rs_info;
65 struct ucontextn32 rs_uc;
68 extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
70 asmlinkage int sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
72 compat_sigset_t __user *unewset;
77 /* XXX Don't preclude handling different sized sigset_t's. */
78 sigsetsize = regs.regs[5];
79 if (sigsetsize != sizeof(sigset_t))
82 unewset = (compat_sigset_t __user *) regs.regs[4];
83 if (copy_from_user(&uset, unewset, sizeof(uset)))
85 sigset_from_compat(&newset, &uset);
86 return sigsuspend(&newset);
89 asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
91 struct rt_sigframe_n32 __user *frame;
95 frame = (struct rt_sigframe_n32 __user *) regs.regs[29];
96 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
98 if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask))
101 set_current_blocked(&set);
103 sig = restore_sigcontext(®s, &frame->rs_uc.uc_mcontext);
107 force_sig(sig, current);
109 if (compat_restore_altstack(&frame->rs_uc.uc_stack))
113 * Don't let your children do this ...
115 __asm__ __volatile__(
123 force_sig(SIGSEGV, current);
126 static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka,
127 struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info)
129 struct rt_sigframe_n32 __user *frame;
132 frame = get_sigframe(ka, regs, sizeof(*frame));
133 if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
136 /* Create siginfo. */
137 err |= copy_siginfo_to_user32(&frame->rs_info, info);
139 /* Create the ucontext. */
140 err |= __put_user(0, &frame->rs_uc.uc_flags);
141 err |= __put_user(0, &frame->rs_uc.uc_link);
142 err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
143 err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
144 err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
150 * Arguments to signal handler:
153 * a1 = 0 (should be cause)
154 * a2 = pointer to ucontext
156 * $25 and c0_epc point to the signal handler, $29 points to
157 * the struct rt_sigframe.
159 regs->regs[ 4] = signr;
160 regs->regs[ 5] = (unsigned long) &frame->rs_info;
161 regs->regs[ 6] = (unsigned long) &frame->rs_uc;
162 regs->regs[29] = (unsigned long) frame;
163 regs->regs[31] = (unsigned long) sig_return;
164 regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
166 DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
167 current->comm, current->pid,
168 frame, regs->cp0_epc, regs->regs[31]);
173 force_sigsegv(signr, current);
177 struct mips_abi mips_abi_n32 = {
178 .setup_rt_frame = setup_rt_frame_n32,
179 .rt_signal_return_offset =
180 offsetof(struct mips_vdso, n32_rt_signal_trampoline),
181 .restart = __NR_N32_restart_syscall