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>
20 #include <linux/sched.h>
22 #include <linux/smp.h>
23 #include <linux/smp_lock.h>
24 #include <linux/kernel.h>
25 #include <linux/signal.h>
26 #include <linux/errno.h>
27 #include <linux/wait.h>
28 #include <linux/ptrace.h>
29 #include <linux/unistd.h>
30 #include <linux/compat.h>
31 #include <linux/bitops.h>
34 #include <asm/cacheflush.h>
36 #include <asm/uaccess.h>
37 #include <asm/ucontext.h>
38 #include <asm/system.h>
40 #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_rt_sigreturn 6211
49 #define __NR_N32_restart_syscall 6214
53 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
55 /* IRIX compatible stack_t */
56 typedef struct sigaltstack32
{
58 compat_size_t ss_size
;
66 struct sigcontext uc_mcontext
;
67 sigset_t uc_sigmask
; /* mask last for extensibility */
70 struct rt_sigframe_n32
{
71 u32 rs_ass
[4]; /* argument save space for o32 */
72 #if ICACHE_REFILLS_WORKAROUND_WAR
75 u32 rs_code
[2]; /* signal trampoline */
77 struct siginfo rs_info
;
78 struct ucontextn32 rs_uc
;
79 #if ICACHE_REFILLS_WORKAROUND_WAR
80 u32 rs_code
[8] ____cacheline_aligned
; /* signal trampoline */
84 save_static_function(sysn32_rt_sigreturn
);
85 __attribute_used__ noinline
static void
86 _sysn32_rt_sigreturn(nabi_no_regargs
struct pt_regs regs
)
88 struct rt_sigframe_n32 __user
*frame
;
93 frame
= (struct rt_sigframe_n32 __user
*) regs
.regs
[29];
94 if (!access_ok(VERIFY_READ
, frame
, sizeof(*frame
)))
96 if (__copy_from_user(&set
, &frame
->rs_uc
.uc_sigmask
, sizeof(set
)))
99 sigdelsetmask(&set
, ~_BLOCKABLE
);
100 spin_lock_irq(¤t
->sighand
->siglock
);
101 current
->blocked
= set
;
103 spin_unlock_irq(¤t
->sighand
->siglock
);
105 if (restore_sigcontext(®s
, &frame
->rs_uc
.uc_mcontext
))
108 /* The ucontext contains a stack32_t, so we must convert! */
109 if (__get_user(sp
, &frame
->rs_uc
.uc_stack
.ss_sp
))
111 st
.ss_size
= (long) sp
;
112 if (__get_user(st
.ss_size
, &frame
->rs_uc
.uc_stack
.ss_size
))
114 if (__get_user(st
.ss_flags
, &frame
->rs_uc
.uc_stack
.ss_flags
))
117 /* It is more difficult to avoid calling this function than to
118 call it and ignore errors. */
119 do_sigaltstack((stack_t __user
*)&st
, NULL
, regs
.regs
[29]);
122 * Don't let your children do this ...
124 __asm__
__volatile__(
132 force_sig(SIGSEGV
, current
);
135 int setup_rt_frame_n32(struct k_sigaction
* ka
,
136 struct pt_regs
*regs
, int signr
, sigset_t
*set
, siginfo_t
*info
)
138 struct rt_sigframe_n32 __user
*frame
;
142 frame
= get_sigframe(ka
, regs
, sizeof(*frame
));
143 if (!access_ok(VERIFY_WRITE
, frame
, sizeof (*frame
)))
146 install_sigtramp(frame
->rs_code
, __NR_N32_rt_sigreturn
);
148 /* Create siginfo. */
149 err
|= copy_siginfo_to_user(&frame
->rs_info
, info
);
151 /* Create the ucontext. */
152 err
|= __put_user(0, &frame
->rs_uc
.uc_flags
);
153 err
|= __put_user(0, &frame
->rs_uc
.uc_link
);
154 sp
= (int) (long) current
->sas_ss_sp
;
155 err
|= __put_user(sp
,
156 &frame
->rs_uc
.uc_stack
.ss_sp
);
157 err
|= __put_user(sas_ss_flags(regs
->regs
[29]),
158 &frame
->rs_uc
.uc_stack
.ss_flags
);
159 err
|= __put_user(current
->sas_ss_size
,
160 &frame
->rs_uc
.uc_stack
.ss_size
);
161 err
|= setup_sigcontext(regs
, &frame
->rs_uc
.uc_mcontext
);
162 err
|= __copy_to_user(&frame
->rs_uc
.uc_sigmask
, set
, sizeof(*set
));
168 * Arguments to signal handler:
171 * a1 = 0 (should be cause)
172 * a2 = pointer to ucontext
174 * $25 and c0_epc point to the signal handler, $29 points to
175 * the struct rt_sigframe.
177 regs
->regs
[ 4] = signr
;
178 regs
->regs
[ 5] = (unsigned long) &frame
->rs_info
;
179 regs
->regs
[ 6] = (unsigned long) &frame
->rs_uc
;
180 regs
->regs
[29] = (unsigned long) frame
;
181 regs
->regs
[31] = (unsigned long) frame
->rs_code
;
182 regs
->cp0_epc
= regs
->regs
[25] = (unsigned long) ka
->sa
.sa_handler
;
185 printk("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%p\n",
186 current
->comm
, current
->pid
,
187 frame
, regs
->cp0_epc
, regs
->regs
[31]);
192 force_sigsegv(signr
, current
);