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> |
1da177e4 LT |
41 | |
42 | #include "signal-common.h" | |
43 | ||
44 | /* | |
45 | * Including <asm/unistd.h> would give use the 64-bit syscall numbers ... | |
46 | */ | |
1da177e4 LT |
47 | #define __NR_N32_restart_syscall 6214 |
48 | ||
205d84aa RB |
49 | extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *); |
50 | extern int restore_sigcontext(struct pt_regs *, struct sigcontext __user *); | |
51 | ||
1da177e4 | 52 | struct ucontextn32 { |
70342287 RB |
53 | u32 uc_flags; |
54 | s32 uc_link; | |
ea536ad4 | 55 | compat_stack_t uc_stack; |
1da177e4 | 56 | struct sigcontext uc_mcontext; |
70342287 | 57 | compat_sigset_t uc_sigmask; /* mask last for extensibility */ |
1da177e4 LT |
58 | }; |
59 | ||
c0b9bae9 FBH |
60 | struct rt_sigframe_n32 { |
61 | u32 rs_ass[4]; /* argument save space for o32 */ | |
d814c28c | 62 | u32 rs_pad[2]; /* Was: signal trampoline */ |
a76f3a41 | 63 | struct compat_siginfo rs_info; |
c0b9bae9 | 64 | struct ucontextn32 rs_uc; |
1da177e4 LT |
65 | }; |
66 | ||
f90080a0 | 67 | asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) |
1da177e4 | 68 | { |
9bbf28a3 | 69 | struct rt_sigframe_n32 __user *frame; |
1da177e4 | 70 | sigset_t set; |
c6a2f467 | 71 | int sig; |
1da177e4 | 72 | |
9bbf28a3 | 73 | frame = (struct rt_sigframe_n32 __user *) regs.regs[29]; |
1da177e4 LT |
74 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
75 | goto badframe; | |
431dc804 | 76 | if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask)) |
1da177e4 LT |
77 | goto badframe; |
78 | ||
8598f3cd | 79 | set_current_blocked(&set); |
1da177e4 | 80 | |
c6a2f467 AN |
81 | sig = restore_sigcontext(®s, &frame->rs_uc.uc_mcontext); |
82 | if (sig < 0) | |
1da177e4 | 83 | goto badframe; |
c6a2f467 AN |
84 | else if (sig) |
85 | force_sig(sig, current); | |
1da177e4 | 86 | |
ea536ad4 | 87 | if (compat_restore_altstack(&frame->rs_uc.uc_stack)) |
1da177e4 | 88 | goto badframe; |
1da177e4 LT |
89 | |
90 | /* | |
91 | * Don't let your children do this ... | |
92 | */ | |
93 | __asm__ __volatile__( | |
94 | "move\t$29, %0\n\t" | |
95 | "j\tsyscall_exit" | |
96 | :/* no outputs */ | |
97 | :"r" (®s)); | |
98 | /* Unreached */ | |
99 | ||
100 | badframe: | |
101 | force_sig(SIGSEGV, current); | |
102 | } | |
103 | ||
81d103bf RW |
104 | static int setup_rt_frame_n32(void *sig_return, struct ksignal *ksig, |
105 | struct pt_regs *regs, sigset_t *set) | |
1da177e4 | 106 | { |
9bbf28a3 | 107 | struct rt_sigframe_n32 __user *frame; |
1da177e4 | 108 | int err = 0; |
1da177e4 | 109 | |
7c4f5635 | 110 | frame = get_sigframe(ksig, regs, sizeof(*frame)); |
1da177e4 | 111 | if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) |
81d103bf | 112 | return -EFAULT; |
1da177e4 | 113 | |
1da177e4 | 114 | /* Create siginfo. */ |
81d103bf | 115 | err |= copy_siginfo_to_user32(&frame->rs_info, &ksig->info); |
1da177e4 | 116 | |
70342287 | 117 | /* Create the ucontext. */ |
1da177e4 LT |
118 | err |= __put_user(0, &frame->rs_uc.uc_flags); |
119 | err |= __put_user(0, &frame->rs_uc.uc_link); | |
ea536ad4 | 120 | err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]); |
1da177e4 | 121 | err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext); |
431dc804 | 122 | err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set); |
1da177e4 LT |
123 | |
124 | if (err) | |
81d103bf | 125 | return -EFAULT; |
1da177e4 LT |
126 | |
127 | /* | |
128 | * Arguments to signal handler: | |
129 | * | |
130 | * a0 = signal number | |
131 | * a1 = 0 (should be cause) | |
132 | * a2 = pointer to ucontext | |
133 | * | |
134 | * $25 and c0_epc point to the signal handler, $29 points to | |
135 | * the struct rt_sigframe. | |
136 | */ | |
81d103bf | 137 | regs->regs[ 4] = ksig->sig; |
1da177e4 LT |
138 | regs->regs[ 5] = (unsigned long) &frame->rs_info; |
139 | regs->regs[ 6] = (unsigned long) &frame->rs_uc; | |
140 | regs->regs[29] = (unsigned long) frame; | |
d814c28c | 141 | regs->regs[31] = (unsigned long) sig_return; |
81d103bf | 142 | regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler; |
1da177e4 | 143 | |
722bb63d | 144 | DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n", |
1da177e4 LT |
145 | current->comm, current->pid, |
146 | frame, regs->cp0_epc, regs->regs[31]); | |
722bb63d | 147 | |
7b3e2fc8 | 148 | return 0; |
1da177e4 | 149 | } |
151fd6ac RB |
150 | |
151 | struct mips_abi mips_abi_n32 = { | |
70342287 | 152 | .setup_rt_frame = setup_rt_frame_n32, |
77856100 PB |
153 | .restart = __NR_N32_restart_syscall, |
154 | ||
155 | .off_sc_fpregs = offsetof(struct sigcontext, sc_fpregs), | |
156 | .off_sc_fpc_csr = offsetof(struct sigcontext, sc_fpc_csr), | |
157 | .off_sc_used_math = offsetof(struct sigcontext, sc_used_math), | |
ebb5e78c AS |
158 | |
159 | .vdso = &vdso_image_n32, | |
151fd6ac | 160 | }; |