ia64/linux-2.6.18-xen.hg

view arch/m68knommu/kernel/traps.c @ 854:950b9eb27661

usbback: fix urb interval value for interrupt urbs.

Signed-off-by: Noboru Iwamatsu <n_iwamatsu@jp.fujitsu.com>
author Keir Fraser <keir.fraser@citrix.com>
date Mon Apr 06 13:51:20 2009 +0100 (2009-04-06)
parents 831230e53067
children
line source
1 /*
2 * linux/arch/m68knommu/kernel/traps.c
3 *
4 * Copyright (C) 1993, 1994 by Hamish Macdonald
5 *
6 * 68040 fixes by Michael Rausch
7 * 68040 fixes by Martin Apel
8 * 68060 fixes by Roman Hodek
9 * 68060 fixes by Jesper Skov
10 *
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License. See the file COPYING in the main directory of this archive
13 * for more details.
14 */
16 /*
17 * Sets up all exception vectors
18 */
19 #include <linux/sched.h>
20 #include <linux/signal.h>
21 #include <linux/kernel.h>
22 #include <linux/mm.h>
23 #include <linux/module.h>
24 #include <linux/types.h>
25 #include <linux/a.out.h>
26 #include <linux/user.h>
27 #include <linux/string.h>
28 #include <linux/linkage.h>
29 #include <linux/init.h>
30 #include <linux/ptrace.h>
32 #include <asm/setup.h>
33 #include <asm/fpu.h>
34 #include <asm/system.h>
35 #include <asm/uaccess.h>
36 #include <asm/traps.h>
37 #include <asm/pgtable.h>
38 #include <asm/machdep.h>
39 #include <asm/siginfo.h>
41 static char const * const vec_names[] = {
42 "RESET SP", "RESET PC", "BUS ERROR", "ADDRESS ERROR",
43 "ILLEGAL INSTRUCTION", "ZERO DIVIDE", "CHK", "TRAPcc",
44 "PRIVILEGE VIOLATION", "TRACE", "LINE 1010", "LINE 1111",
45 "UNASSIGNED RESERVED 12", "COPROCESSOR PROTOCOL VIOLATION",
46 "FORMAT ERROR", "UNINITIALIZED INTERRUPT",
47 "UNASSIGNED RESERVED 16", "UNASSIGNED RESERVED 17",
48 "UNASSIGNED RESERVED 18", "UNASSIGNED RESERVED 19",
49 "UNASSIGNED RESERVED 20", "UNASSIGNED RESERVED 21",
50 "UNASSIGNED RESERVED 22", "UNASSIGNED RESERVED 23",
51 "SPURIOUS INTERRUPT", "LEVEL 1 INT", "LEVEL 2 INT", "LEVEL 3 INT",
52 "LEVEL 4 INT", "LEVEL 5 INT", "LEVEL 6 INT", "LEVEL 7 INT",
53 "SYSCALL", "TRAP #1", "TRAP #2", "TRAP #3",
54 "TRAP #4", "TRAP #5", "TRAP #6", "TRAP #7",
55 "TRAP #8", "TRAP #9", "TRAP #10", "TRAP #11",
56 "TRAP #12", "TRAP #13", "TRAP #14", "TRAP #15",
57 "FPCP BSUN", "FPCP INEXACT", "FPCP DIV BY 0", "FPCP UNDERFLOW",
58 "FPCP OPERAND ERROR", "FPCP OVERFLOW", "FPCP SNAN",
59 "FPCP UNSUPPORTED OPERATION",
60 "MMU CONFIGURATION ERROR"
61 };
63 void __init trap_init(void)
64 {
65 if (mach_trap_init)
66 mach_trap_init();
67 }
69 void die_if_kernel(char *str, struct pt_regs *fp, int nr)
70 {
71 if (!(fp->sr & PS_S))
72 return;
74 console_verbose();
75 printk(KERN_EMERG "%s: %08x\n",str,nr);
76 printk(KERN_EMERG "PC: [<%08lx>]\nSR: %04x SP: %p a2: %08lx\n",
77 fp->pc, fp->sr, fp, fp->a2);
78 printk(KERN_EMERG "d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n",
79 fp->d0, fp->d1, fp->d2, fp->d3);
80 printk(KERN_EMERG "d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n",
81 fp->d4, fp->d5, fp->a0, fp->a1);
83 printk(KERN_EMERG "Process %s (pid: %d, stackpage=%08lx)\n",
84 current->comm, current->pid, PAGE_SIZE+(unsigned long)current);
85 show_stack(NULL, (unsigned long *)fp);
86 do_exit(SIGSEGV);
87 }
89 asmlinkage void buserr_c(struct frame *fp)
90 {
91 /* Only set esp0 if coming from user mode */
92 if (user_mode(&fp->ptregs))
93 current->thread.esp0 = (unsigned long) fp;
95 #if defined(DEBUG)
96 printk (KERN_DEBUG "*** Bus Error *** Format is %x\n", fp->ptregs.format);
97 #endif
99 die_if_kernel("bad frame format",&fp->ptregs,0);
100 #if defined(DEBUG)
101 printk(KERN_DEBUG "Unknown SIGSEGV - 4\n");
102 #endif
103 force_sig(SIGSEGV, current);
104 }
107 int kstack_depth_to_print = 48;
109 void show_stack(struct task_struct *task, unsigned long *stack)
110 {
111 unsigned long *endstack, addr;
112 extern char _start, _etext;
113 int i;
115 if (!stack) {
116 if (task)
117 stack = (unsigned long *)task->thread.ksp;
118 else
119 stack = (unsigned long *)&stack;
120 }
122 addr = (unsigned long) stack;
123 endstack = (unsigned long *) PAGE_ALIGN(addr);
125 printk(KERN_EMERG "Stack from %08lx:", (unsigned long)stack);
126 for (i = 0; i < kstack_depth_to_print; i++) {
127 if (stack + 1 > endstack)
128 break;
129 if (i % 8 == 0)
130 printk(KERN_EMERG "\n ");
131 printk(KERN_EMERG " %08lx", *stack++);
132 }
134 printk(KERN_EMERG "\nCall Trace:");
135 i = 0;
136 while (stack + 1 <= endstack) {
137 addr = *stack++;
138 /*
139 * If the address is either in the text segment of the
140 * kernel, or in the region which contains vmalloc'ed
141 * memory, it *may* be the address of a calling
142 * routine; if so, print it so that someone tracing
143 * down the cause of the crash will be able to figure
144 * out the call path that was taken.
145 */
146 if (((addr >= (unsigned long) &_start) &&
147 (addr <= (unsigned long) &_etext))) {
148 if (i % 4 == 0)
149 printk(KERN_EMERG "\n ");
150 printk(KERN_EMERG " [<%08lx>]", addr);
151 i++;
152 }
153 }
154 printk(KERN_EMERG "\n");
155 }
157 void bad_super_trap(struct frame *fp)
158 {
159 console_verbose();
160 if (fp->ptregs.vector < 4*sizeof(vec_names)/sizeof(vec_names[0]))
161 printk (KERN_WARNING "*** %s *** FORMAT=%X\n",
162 vec_names[(fp->ptregs.vector) >> 2],
163 fp->ptregs.format);
164 else
165 printk (KERN_WARNING "*** Exception %d *** FORMAT=%X\n",
166 (fp->ptregs.vector) >> 2,
167 fp->ptregs.format);
168 printk (KERN_WARNING "Current process id is %d\n", current->pid);
169 die_if_kernel("BAD KERNEL TRAP", &fp->ptregs, 0);
170 }
172 asmlinkage void trap_c(struct frame *fp)
173 {
174 int sig;
175 siginfo_t info;
177 if (fp->ptregs.sr & PS_S) {
178 if ((fp->ptregs.vector >> 2) == VEC_TRACE) {
179 /* traced a trapping instruction */
180 current->ptrace |= PT_DTRACE;
181 } else
182 bad_super_trap(fp);
183 return;
184 }
186 /* send the appropriate signal to the user program */
187 switch ((fp->ptregs.vector) >> 2) {
188 case VEC_ADDRERR:
189 info.si_code = BUS_ADRALN;
190 sig = SIGBUS;
191 break;
192 case VEC_ILLEGAL:
193 case VEC_LINE10:
194 case VEC_LINE11:
195 info.si_code = ILL_ILLOPC;
196 sig = SIGILL;
197 break;
198 case VEC_PRIV:
199 info.si_code = ILL_PRVOPC;
200 sig = SIGILL;
201 break;
202 case VEC_COPROC:
203 info.si_code = ILL_COPROC;
204 sig = SIGILL;
205 break;
206 case VEC_TRAP1: /* gdbserver breakpoint */
207 fp->ptregs.pc -= 2;
208 info.si_code = TRAP_TRACE;
209 sig = SIGTRAP;
210 break;
211 case VEC_TRAP2:
212 case VEC_TRAP3:
213 case VEC_TRAP4:
214 case VEC_TRAP5:
215 case VEC_TRAP6:
216 case VEC_TRAP7:
217 case VEC_TRAP8:
218 case VEC_TRAP9:
219 case VEC_TRAP10:
220 case VEC_TRAP11:
221 case VEC_TRAP12:
222 case VEC_TRAP13:
223 case VEC_TRAP14:
224 info.si_code = ILL_ILLTRP;
225 sig = SIGILL;
226 break;
227 case VEC_FPBRUC:
228 case VEC_FPOE:
229 case VEC_FPNAN:
230 info.si_code = FPE_FLTINV;
231 sig = SIGFPE;
232 break;
233 case VEC_FPIR:
234 info.si_code = FPE_FLTRES;
235 sig = SIGFPE;
236 break;
237 case VEC_FPDIVZ:
238 info.si_code = FPE_FLTDIV;
239 sig = SIGFPE;
240 break;
241 case VEC_FPUNDER:
242 info.si_code = FPE_FLTUND;
243 sig = SIGFPE;
244 break;
245 case VEC_FPOVER:
246 info.si_code = FPE_FLTOVF;
247 sig = SIGFPE;
248 break;
249 case VEC_ZERODIV:
250 info.si_code = FPE_INTDIV;
251 sig = SIGFPE;
252 break;
253 case VEC_CHK:
254 case VEC_TRAP:
255 info.si_code = FPE_INTOVF;
256 sig = SIGFPE;
257 break;
258 case VEC_TRACE: /* ptrace single step */
259 info.si_code = TRAP_TRACE;
260 sig = SIGTRAP;
261 break;
262 case VEC_TRAP15: /* breakpoint */
263 info.si_code = TRAP_BRKPT;
264 sig = SIGTRAP;
265 break;
266 default:
267 info.si_code = ILL_ILLOPC;
268 sig = SIGILL;
269 break;
270 }
271 info.si_signo = sig;
272 info.si_errno = 0;
273 switch (fp->ptregs.format) {
274 default:
275 info.si_addr = (void *) fp->ptregs.pc;
276 break;
277 case 2:
278 info.si_addr = (void *) fp->un.fmt2.iaddr;
279 break;
280 case 7:
281 info.si_addr = (void *) fp->un.fmt7.effaddr;
282 break;
283 case 9:
284 info.si_addr = (void *) fp->un.fmt9.iaddr;
285 break;
286 case 10:
287 info.si_addr = (void *) fp->un.fmta.daddr;
288 break;
289 case 11:
290 info.si_addr = (void *) fp->un.fmtb.daddr;
291 break;
292 }
293 force_sig_info (sig, &info, current);
294 }
296 asmlinkage void set_esp0(unsigned long ssp)
297 {
298 current->thread.esp0 = ssp;
299 }
302 /*
303 * The architecture-independent backtrace generator
304 */
305 void dump_stack(void)
306 {
307 unsigned long stack;
309 show_stack(current, &stack);
310 }
312 EXPORT_SYMBOL(dump_stack);
314 #ifdef CONFIG_M68KFPU_EMU
315 asmlinkage void fpemu_signal(int signal, int code, void *addr)
316 {
317 siginfo_t info;
319 info.si_signo = signal;
320 info.si_errno = 0;
321 info.si_code = code;
322 info.si_addr = addr;
323 force_sig_info(signal, &info, current);
324 }
325 #endif