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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 | ||
53 | ||
1da177e4 LT |
54 | /* IRIX compatible stack_t */ |
55 | typedef struct sigaltstack32 { | |
56 | s32 ss_sp; | |
57 | compat_size_t ss_size; | |
58 | int ss_flags; | |
59 | } stack32_t; | |
60 | ||
61 | struct ucontextn32 { | |
70342287 RB |
62 | u32 uc_flags; |
63 | s32 uc_link; | |
64 | stack32_t uc_stack; | |
1da177e4 | 65 | struct sigcontext uc_mcontext; |
70342287 | 66 | compat_sigset_t uc_sigmask; /* mask last for extensibility */ |
1da177e4 LT |
67 | }; |
68 | ||
c0b9bae9 FBH |
69 | struct rt_sigframe_n32 { |
70 | u32 rs_ass[4]; /* argument save space for o32 */ | |
d814c28c | 71 | u32 rs_pad[2]; /* Was: signal trampoline */ |
a76f3a41 | 72 | struct compat_siginfo rs_info; |
c0b9bae9 | 73 | struct ucontextn32 rs_uc; |
1da177e4 LT |
74 | }; |
75 | ||
49a89efb | 76 | extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat); |
3f2e05e9 | 77 | |
f90080a0 | 78 | asmlinkage int sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs) |
82ad93f4 | 79 | { |
b1bcb362 AN |
80 | compat_sigset_t __user *unewset; |
81 | compat_sigset_t uset; | |
82ad93f4 RB |
82 | size_t sigsetsize; |
83 | sigset_t newset; | |
84 | ||
85 | /* XXX Don't preclude handling different sized sigset_t's. */ | |
86 | sigsetsize = regs.regs[5]; | |
87 | if (sigsetsize != sizeof(sigset_t)) | |
88 | return -EINVAL; | |
89 | ||
90 | unewset = (compat_sigset_t __user *) regs.regs[4]; | |
91 | if (copy_from_user(&uset, unewset, sizeof(uset))) | |
92 | return -EFAULT; | |
49a89efb | 93 | sigset_from_compat(&newset, &uset); |
68f3f16d | 94 | return sigsuspend(&newset); |
82ad93f4 RB |
95 | } |
96 | ||
f90080a0 | 97 | asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) |
1da177e4 | 98 | { |
9bbf28a3 | 99 | struct rt_sigframe_n32 __user *frame; |
4bfb8c5c | 100 | mm_segment_t old_fs; |
1da177e4 LT |
101 | sigset_t set; |
102 | stack_t st; | |
103 | s32 sp; | |
c6a2f467 | 104 | int sig; |
1da177e4 | 105 | |
9bbf28a3 | 106 | frame = (struct rt_sigframe_n32 __user *) regs.regs[29]; |
1da177e4 LT |
107 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
108 | goto badframe; | |
431dc804 | 109 | if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask)) |
1da177e4 LT |
110 | goto badframe; |
111 | ||
8598f3cd | 112 | set_current_blocked(&set); |
1da177e4 | 113 | |
c6a2f467 AN |
114 | sig = restore_sigcontext(®s, &frame->rs_uc.uc_mcontext); |
115 | if (sig < 0) | |
1da177e4 | 116 | goto badframe; |
c6a2f467 AN |
117 | else if (sig) |
118 | force_sig(sig, current); | |
1da177e4 LT |
119 | |
120 | /* The ucontext contains a stack32_t, so we must convert! */ | |
121 | if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp)) | |
122 | goto badframe; | |
9c6031cc | 123 | st.ss_sp = (void __user *)(long) sp; |
1da177e4 LT |
124 | if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size)) |
125 | goto badframe; | |
126 | if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags)) | |
127 | goto badframe; | |
128 | ||
129 | /* It is more difficult to avoid calling this function than to | |
130 | call it and ignore errors. */ | |
4bfb8c5c AV |
131 | old_fs = get_fs(); |
132 | set_fs(KERNEL_DS); | |
9bbf28a3 | 133 | do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]); |
4bfb8c5c AV |
134 | set_fs(old_fs); |
135 | ||
1da177e4 LT |
136 | |
137 | /* | |
138 | * Don't let your children do this ... | |
139 | */ | |
140 | __asm__ __volatile__( | |
141 | "move\t$29, %0\n\t" | |
142 | "j\tsyscall_exit" | |
143 | :/* no outputs */ | |
144 | :"r" (®s)); | |
145 | /* Unreached */ | |
146 | ||
147 | badframe: | |
148 | force_sig(SIGSEGV, current); | |
149 | } | |
150 | ||
d814c28c | 151 | static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka, |
1da177e4 LT |
152 | struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info) |
153 | { | |
9bbf28a3 | 154 | struct rt_sigframe_n32 __user *frame; |
1da177e4 LT |
155 | int err = 0; |
156 | s32 sp; | |
157 | ||
158 | frame = get_sigframe(ka, regs, sizeof(*frame)); | |
159 | if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) | |
160 | goto give_sigsegv; | |
161 | ||
1da177e4 | 162 | /* Create siginfo. */ |
a76f3a41 | 163 | err |= copy_siginfo_to_user32(&frame->rs_info, info); |
1da177e4 | 164 | |
70342287 | 165 | /* Create the ucontext. */ |
1da177e4 LT |
166 | err |= __put_user(0, &frame->rs_uc.uc_flags); |
167 | err |= __put_user(0, &frame->rs_uc.uc_link); | |
e0daad44 | 168 | sp = (int) (long) current->sas_ss_sp; |
1da177e4 | 169 | err |= __put_user(sp, |
70342287 | 170 | &frame->rs_uc.uc_stack.ss_sp); |
1da177e4 | 171 | err |= __put_user(sas_ss_flags(regs->regs[29]), |
70342287 | 172 | &frame->rs_uc.uc_stack.ss_flags); |
1da177e4 | 173 | err |= __put_user(current->sas_ss_size, |
70342287 | 174 | &frame->rs_uc.uc_stack.ss_size); |
1da177e4 | 175 | err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext); |
431dc804 | 176 | err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set); |
1da177e4 LT |
177 | |
178 | if (err) | |
179 | goto give_sigsegv; | |
180 | ||
181 | /* | |
182 | * Arguments to signal handler: | |
183 | * | |
184 | * a0 = signal number | |
185 | * a1 = 0 (should be cause) | |
186 | * a2 = pointer to ucontext | |
187 | * | |
188 | * $25 and c0_epc point to the signal handler, $29 points to | |
189 | * the struct rt_sigframe. | |
190 | */ | |
191 | regs->regs[ 4] = signr; | |
192 | regs->regs[ 5] = (unsigned long) &frame->rs_info; | |
193 | regs->regs[ 6] = (unsigned long) &frame->rs_uc; | |
194 | regs->regs[29] = (unsigned long) frame; | |
d814c28c | 195 | regs->regs[31] = (unsigned long) sig_return; |
1da177e4 LT |
196 | regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler; |
197 | ||
722bb63d | 198 | DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n", |
1da177e4 LT |
199 | current->comm, current->pid, |
200 | frame, regs->cp0_epc, regs->regs[31]); | |
722bb63d | 201 | |
7b3e2fc8 | 202 | return 0; |
1da177e4 LT |
203 | |
204 | give_sigsegv: | |
205 | force_sigsegv(signr, current); | |
7b3e2fc8 | 206 | return -EFAULT; |
1da177e4 | 207 | } |
151fd6ac RB |
208 | |
209 | struct mips_abi mips_abi_n32 = { | |
70342287 | 210 | .setup_rt_frame = setup_rt_frame_n32, |
d814c28c DD |
211 | .rt_signal_return_offset = |
212 | offsetof(struct mips_vdso, n32_rt_signal_trampoline), | |
151fd6ac RB |
213 | .restart = __NR_N32_restart_syscall |
214 | }; |