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> | |
38 | #include <asm/system.h> | |
39 | #include <asm/fpu.h> | |
40 | #include <asm/cpu-features.h> | |
02416dcf | 41 | #include <asm/war.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 | */ | |
48 | #define __NR_N32_rt_sigreturn 6211 | |
49 | #define __NR_N32_restart_syscall 6214 | |
50 | ||
205d84aa RB |
51 | extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *); |
52 | extern int restore_sigcontext(struct pt_regs *, struct sigcontext __user *); | |
53 | ||
54 | ||
1da177e4 LT |
55 | /* IRIX compatible stack_t */ |
56 | typedef struct sigaltstack32 { | |
57 | s32 ss_sp; | |
58 | compat_size_t ss_size; | |
59 | int ss_flags; | |
60 | } stack32_t; | |
61 | ||
62 | struct ucontextn32 { | |
63 | u32 uc_flags; | |
64 | s32 uc_link; | |
65 | stack32_t uc_stack; | |
66 | struct sigcontext uc_mcontext; | |
431dc804 | 67 | compat_sigset_t uc_sigmask; /* mask last for extensibility */ |
1da177e4 LT |
68 | }; |
69 | ||
c0b9bae9 FBH |
70 | #if ICACHE_REFILLS_WORKAROUND_WAR == 0 |
71 | ||
1da177e4 LT |
72 | struct rt_sigframe_n32 { |
73 | u32 rs_ass[4]; /* argument save space for o32 */ | |
02416dcf | 74 | u32 rs_code[2]; /* signal trampoline */ |
a76f3a41 | 75 | struct compat_siginfo rs_info; |
1da177e4 | 76 | struct ucontextn32 rs_uc; |
c0b9bae9 FBH |
77 | }; |
78 | ||
79 | #else /* ICACHE_REFILLS_WORKAROUND_WAR */ | |
80 | ||
81 | struct rt_sigframe_n32 { | |
82 | u32 rs_ass[4]; /* argument save space for o32 */ | |
83 | u32 rs_pad[2]; | |
a76f3a41 | 84 | struct compat_siginfo rs_info; |
c0b9bae9 | 85 | struct ucontextn32 rs_uc; |
02416dcf | 86 | u32 rs_code[8] ____cacheline_aligned; /* signal trampoline */ |
1da177e4 LT |
87 | }; |
88 | ||
c0b9bae9 FBH |
89 | #endif /* !ICACHE_REFILLS_WORKAROUND_WAR */ |
90 | ||
49a89efb | 91 | extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat); |
3f2e05e9 | 92 | |
f90080a0 | 93 | asmlinkage int sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs) |
82ad93f4 | 94 | { |
b1bcb362 AN |
95 | compat_sigset_t __user *unewset; |
96 | compat_sigset_t uset; | |
82ad93f4 RB |
97 | size_t sigsetsize; |
98 | sigset_t newset; | |
99 | ||
100 | /* XXX Don't preclude handling different sized sigset_t's. */ | |
101 | sigsetsize = regs.regs[5]; | |
102 | if (sigsetsize != sizeof(sigset_t)) | |
103 | return -EINVAL; | |
104 | ||
105 | unewset = (compat_sigset_t __user *) regs.regs[4]; | |
106 | if (copy_from_user(&uset, unewset, sizeof(uset))) | |
107 | return -EFAULT; | |
49a89efb | 108 | sigset_from_compat(&newset, &uset); |
82ad93f4 RB |
109 | sigdelsetmask(&newset, ~_BLOCKABLE); |
110 | ||
111 | spin_lock_irq(¤t->sighand->siglock); | |
112 | current->saved_sigmask = current->blocked; | |
113 | current->blocked = newset; | |
e0daad44 | 114 | recalc_sigpending(); |
82ad93f4 RB |
115 | spin_unlock_irq(¤t->sighand->siglock); |
116 | ||
117 | current->state = TASK_INTERRUPTIBLE; | |
118 | schedule(); | |
119 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
120 | return -ERESTARTNOHAND; | |
121 | } | |
122 | ||
f90080a0 | 123 | asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) |
1da177e4 | 124 | { |
9bbf28a3 | 125 | struct rt_sigframe_n32 __user *frame; |
1da177e4 LT |
126 | sigset_t set; |
127 | stack_t st; | |
128 | s32 sp; | |
c6a2f467 | 129 | int sig; |
1da177e4 | 130 | |
9bbf28a3 | 131 | frame = (struct rt_sigframe_n32 __user *) regs.regs[29]; |
1da177e4 LT |
132 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
133 | goto badframe; | |
431dc804 | 134 | if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask)) |
1da177e4 LT |
135 | goto badframe; |
136 | ||
137 | sigdelsetmask(&set, ~_BLOCKABLE); | |
138 | spin_lock_irq(¤t->sighand->siglock); | |
139 | current->blocked = set; | |
140 | recalc_sigpending(); | |
141 | spin_unlock_irq(¤t->sighand->siglock); | |
142 | ||
c6a2f467 AN |
143 | sig = restore_sigcontext(®s, &frame->rs_uc.uc_mcontext); |
144 | if (sig < 0) | |
1da177e4 | 145 | goto badframe; |
c6a2f467 AN |
146 | else if (sig) |
147 | force_sig(sig, current); | |
1da177e4 LT |
148 | |
149 | /* The ucontext contains a stack32_t, so we must convert! */ | |
150 | if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp)) | |
151 | goto badframe; | |
9c6031cc | 152 | st.ss_sp = (void __user *)(long) sp; |
1da177e4 LT |
153 | if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size)) |
154 | goto badframe; | |
155 | if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags)) | |
156 | goto badframe; | |
157 | ||
158 | /* It is more difficult to avoid calling this function than to | |
159 | call it and ignore errors. */ | |
9bbf28a3 | 160 | do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]); |
1da177e4 LT |
161 | |
162 | /* | |
163 | * Don't let your children do this ... | |
164 | */ | |
165 | __asm__ __volatile__( | |
166 | "move\t$29, %0\n\t" | |
167 | "j\tsyscall_exit" | |
168 | :/* no outputs */ | |
169 | :"r" (®s)); | |
170 | /* Unreached */ | |
171 | ||
172 | badframe: | |
173 | force_sig(SIGSEGV, current); | |
174 | } | |
175 | ||
151fd6ac | 176 | static int setup_rt_frame_n32(struct k_sigaction * ka, |
1da177e4 LT |
177 | struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info) |
178 | { | |
9bbf28a3 | 179 | struct rt_sigframe_n32 __user *frame; |
1da177e4 LT |
180 | int err = 0; |
181 | s32 sp; | |
182 | ||
183 | frame = get_sigframe(ka, regs, sizeof(*frame)); | |
184 | if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) | |
185 | goto give_sigsegv; | |
186 | ||
02416dcf | 187 | install_sigtramp(frame->rs_code, __NR_N32_rt_sigreturn); |
1da177e4 LT |
188 | |
189 | /* Create siginfo. */ | |
a76f3a41 | 190 | err |= copy_siginfo_to_user32(&frame->rs_info, info); |
1da177e4 LT |
191 | |
192 | /* Create the ucontext. */ | |
193 | err |= __put_user(0, &frame->rs_uc.uc_flags); | |
194 | err |= __put_user(0, &frame->rs_uc.uc_link); | |
e0daad44 | 195 | sp = (int) (long) current->sas_ss_sp; |
1da177e4 LT |
196 | err |= __put_user(sp, |
197 | &frame->rs_uc.uc_stack.ss_sp); | |
198 | err |= __put_user(sas_ss_flags(regs->regs[29]), | |
199 | &frame->rs_uc.uc_stack.ss_flags); | |
200 | err |= __put_user(current->sas_ss_size, | |
201 | &frame->rs_uc.uc_stack.ss_size); | |
202 | err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext); | |
431dc804 | 203 | err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set); |
1da177e4 LT |
204 | |
205 | if (err) | |
206 | goto give_sigsegv; | |
207 | ||
208 | /* | |
209 | * Arguments to signal handler: | |
210 | * | |
211 | * a0 = signal number | |
212 | * a1 = 0 (should be cause) | |
213 | * a2 = pointer to ucontext | |
214 | * | |
215 | * $25 and c0_epc point to the signal handler, $29 points to | |
216 | * the struct rt_sigframe. | |
217 | */ | |
218 | regs->regs[ 4] = signr; | |
219 | regs->regs[ 5] = (unsigned long) &frame->rs_info; | |
220 | regs->regs[ 6] = (unsigned long) &frame->rs_uc; | |
221 | regs->regs[29] = (unsigned long) frame; | |
222 | regs->regs[31] = (unsigned long) frame->rs_code; | |
223 | regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler; | |
224 | ||
722bb63d | 225 | DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n", |
1da177e4 LT |
226 | current->comm, current->pid, |
227 | frame, regs->cp0_epc, regs->regs[31]); | |
722bb63d | 228 | |
7b3e2fc8 | 229 | return 0; |
1da177e4 LT |
230 | |
231 | give_sigsegv: | |
232 | force_sigsegv(signr, current); | |
7b3e2fc8 | 233 | return -EFAULT; |
1da177e4 | 234 | } |
151fd6ac RB |
235 | |
236 | struct mips_abi mips_abi_n32 = { | |
237 | .setup_rt_frame = setup_rt_frame_n32, | |
238 | .restart = __NR_N32_restart_syscall | |
239 | }; |