Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2003 Broadcom Corporation | |
3 | * | |
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. | |
8 | * | |
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. | |
13 | * | |
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. | |
17 | */ | |
02416dcf RB |
18 | #include <linux/cache.h> |
19 | #include <linux/sched.h> | |
1da177e4 LT |
20 | #include <linux/mm.h> |
21 | #include <linux/smp.h> | |
1da177e4 LT |
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> | |
30 | ||
151fd6ac | 31 | #include <asm/abi.h> |
1da177e4 LT |
32 | #include <asm/asm.h> |
33 | #include <asm/cacheflush.h> | |
431dc804 | 34 | #include <asm/compat-signal.h> |
1da177e4 LT |
35 | #include <asm/sim.h> |
36 | #include <asm/uaccess.h> | |
37 | #include <asm/ucontext.h> | |
1da177e4 LT |
38 | #include <asm/fpu.h> |
39 | #include <asm/cpu-features.h> | |
02416dcf | 40 | #include <asm/war.h> |
d814c28c | 41 | #include <asm/vdso.h> |
1da177e4 LT |
42 | |
43 | #include "signal-common.h" | |
44 | ||
45 | /* | |
46 | * Including <asm/unistd.h> would give use the 64-bit syscall numbers ... | |
47 | */ | |
1da177e4 LT |
48 | #define __NR_N32_restart_syscall 6214 |
49 | ||
205d84aa RB |
50 | extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *); |
51 | extern int restore_sigcontext(struct pt_regs *, struct sigcontext __user *); | |
52 | ||
1da177e4 LT |
53 | struct ucontextn32 { |
54 | u32 uc_flags; | |
55 | s32 uc_link; | |
ea536ad4 | 56 | compat_stack_t uc_stack; |
1da177e4 | 57 | struct sigcontext uc_mcontext; |
431dc804 | 58 | compat_sigset_t uc_sigmask; /* mask last for extensibility */ |
1da177e4 LT |
59 | }; |
60 | ||
c0b9bae9 FBH |
61 | struct rt_sigframe_n32 { |
62 | u32 rs_ass[4]; /* argument save space for o32 */ | |
d814c28c | 63 | u32 rs_pad[2]; /* Was: signal trampoline */ |
a76f3a41 | 64 | struct compat_siginfo rs_info; |
c0b9bae9 | 65 | struct ucontextn32 rs_uc; |
1da177e4 LT |
66 | }; |
67 | ||
49a89efb | 68 | extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat); |
3f2e05e9 | 69 | |
f90080a0 | 70 | asmlinkage int sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs) |
82ad93f4 | 71 | { |
b1bcb362 AN |
72 | compat_sigset_t __user *unewset; |
73 | compat_sigset_t uset; | |
82ad93f4 RB |
74 | size_t sigsetsize; |
75 | sigset_t newset; | |
76 | ||
77 | /* XXX Don't preclude handling different sized sigset_t's. */ | |
78 | sigsetsize = regs.regs[5]; | |
79 | if (sigsetsize != sizeof(sigset_t)) | |
80 | return -EINVAL; | |
81 | ||
82 | unewset = (compat_sigset_t __user *) regs.regs[4]; | |
83 | if (copy_from_user(&uset, unewset, sizeof(uset))) | |
84 | return -EFAULT; | |
49a89efb | 85 | sigset_from_compat(&newset, &uset); |
68f3f16d | 86 | return sigsuspend(&newset); |
82ad93f4 RB |
87 | } |
88 | ||
f90080a0 | 89 | asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) |
1da177e4 | 90 | { |
9bbf28a3 | 91 | struct rt_sigframe_n32 __user *frame; |
1da177e4 | 92 | sigset_t set; |
c6a2f467 | 93 | int sig; |
1da177e4 | 94 | |
9bbf28a3 | 95 | frame = (struct rt_sigframe_n32 __user *) regs.regs[29]; |
1da177e4 LT |
96 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
97 | goto badframe; | |
431dc804 | 98 | if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask)) |
1da177e4 LT |
99 | goto badframe; |
100 | ||
8598f3cd | 101 | set_current_blocked(&set); |
1da177e4 | 102 | |
c6a2f467 AN |
103 | sig = restore_sigcontext(®s, &frame->rs_uc.uc_mcontext); |
104 | if (sig < 0) | |
1da177e4 | 105 | goto badframe; |
c6a2f467 AN |
106 | else if (sig) |
107 | force_sig(sig, current); | |
1da177e4 | 108 | |
ea536ad4 | 109 | if (compat_restore_altstack(&frame->rs_uc.uc_stack)) |
1da177e4 | 110 | goto badframe; |
1da177e4 LT |
111 | |
112 | /* | |
113 | * Don't let your children do this ... | |
114 | */ | |
115 | __asm__ __volatile__( | |
116 | "move\t$29, %0\n\t" | |
117 | "j\tsyscall_exit" | |
118 | :/* no outputs */ | |
119 | :"r" (®s)); | |
120 | /* Unreached */ | |
121 | ||
122 | badframe: | |
123 | force_sig(SIGSEGV, current); | |
124 | } | |
125 | ||
d814c28c | 126 | static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka, |
1da177e4 LT |
127 | struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info) |
128 | { | |
9bbf28a3 | 129 | struct rt_sigframe_n32 __user *frame; |
1da177e4 | 130 | int err = 0; |
1da177e4 LT |
131 | |
132 | frame = get_sigframe(ka, regs, sizeof(*frame)); | |
133 | if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) | |
134 | goto give_sigsegv; | |
135 | ||
1da177e4 | 136 | /* Create siginfo. */ |
a76f3a41 | 137 | err |= copy_siginfo_to_user32(&frame->rs_info, info); |
1da177e4 LT |
138 | |
139 | /* Create the ucontext. */ | |
140 | err |= __put_user(0, &frame->rs_uc.uc_flags); | |
141 | err |= __put_user(0, &frame->rs_uc.uc_link); | |
ea536ad4 | 142 | err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]); |
1da177e4 | 143 | err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext); |
431dc804 | 144 | err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set); |
1da177e4 LT |
145 | |
146 | if (err) | |
147 | goto give_sigsegv; | |
148 | ||
149 | /* | |
150 | * Arguments to signal handler: | |
151 | * | |
152 | * a0 = signal number | |
153 | * a1 = 0 (should be cause) | |
154 | * a2 = pointer to ucontext | |
155 | * | |
156 | * $25 and c0_epc point to the signal handler, $29 points to | |
157 | * the struct rt_sigframe. | |
158 | */ | |
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; | |
d814c28c | 163 | regs->regs[31] = (unsigned long) sig_return; |
1da177e4 LT |
164 | regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler; |
165 | ||
722bb63d | 166 | DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n", |
1da177e4 LT |
167 | current->comm, current->pid, |
168 | frame, regs->cp0_epc, regs->regs[31]); | |
722bb63d | 169 | |
7b3e2fc8 | 170 | return 0; |
1da177e4 LT |
171 | |
172 | give_sigsegv: | |
173 | force_sigsegv(signr, current); | |
7b3e2fc8 | 174 | return -EFAULT; |
1da177e4 | 175 | } |
151fd6ac RB |
176 | |
177 | struct mips_abi mips_abi_n32 = { | |
178 | .setup_rt_frame = setup_rt_frame_n32, | |
d814c28c DD |
179 | .rt_signal_return_offset = |
180 | offsetof(struct mips_vdso, n32_rt_signal_trampoline), | |
151fd6ac RB |
181 | .restart = __NR_N32_restart_syscall |
182 | }; |