]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - arch/cris/arch-v32/kernel/traps.c
2 * Copyright (C) 2003-2006, Axis Communications AB.
5 #include <linux/ptrace.h>
6 #include <linux/extable.h>
7 #include <linux/uaccess.h>
8 #include <linux/sched/debug.h>
10 #include <hwregs/supp_reg.h>
11 #include <hwregs/intr_vect_defs.h>
14 void show_registers(struct pt_regs
*regs
)
17 * It's possible to use either the USP register or current->thread.usp.
18 * USP might not correspond to the current process for all cases this
19 * function is called, and current->thread.usp isn't up to date for the
20 * current process. Experience shows that using USP is the way to go.
22 unsigned long usp
= rdusp();
23 unsigned long d_mmu_cause
;
24 unsigned long i_mmu_cause
;
26 printk("CPU: %d\n", smp_processor_id());
28 printk("ERP: %08lx SRP: %08lx CCS: %08lx USP: %08lx MOF: %08lx\n",
29 regs
->erp
, regs
->srp
, regs
->ccs
, usp
, regs
->mof
);
31 printk(" r0: %08lx r1: %08lx r2: %08lx r3: %08lx\n",
32 regs
->r0
, regs
->r1
, regs
->r2
, regs
->r3
);
34 printk(" r4: %08lx r5: %08lx r6: %08lx r7: %08lx\n",
35 regs
->r4
, regs
->r5
, regs
->r6
, regs
->r7
);
37 printk(" r8: %08lx r9: %08lx r10: %08lx r11: %08lx\n",
38 regs
->r8
, regs
->r9
, regs
->r10
, regs
->r11
);
40 printk("r12: %08lx r13: %08lx oR10: %08lx acr: %08lx\n",
41 regs
->r12
, regs
->r13
, regs
->orig_r10
, regs
->acr
);
43 printk(" sp: %08lx\n", (unsigned long)regs
);
45 SUPP_BANK_SEL(BANK_IM
);
46 SUPP_REG_RD(RW_MM_CAUSE
, i_mmu_cause
);
48 SUPP_BANK_SEL(BANK_DM
);
49 SUPP_REG_RD(RW_MM_CAUSE
, d_mmu_cause
);
51 printk(" Data MMU Cause: %08lx\n", d_mmu_cause
);
52 printk("Instruction MMU Cause: %08lx\n", i_mmu_cause
);
54 printk("Process %s (pid: %d, stackpage=%08lx)\n",
55 current
->comm
, current
->pid
, (unsigned long)current
);
58 * When in-kernel, we also print out the stack and code at the
61 if (!user_mode(regs
)) {
64 show_stack(NULL
, (unsigned long *)usp
);
67 * If the previous stack-dump wasn't a kernel one, dump the
71 show_stack(NULL
, NULL
);
75 if (regs
->erp
< PAGE_OFFSET
)
79 * Quite often the value at regs->erp doesn't point to the
80 * interesting instruction, which often is the previous
81 * instruction. So dump at an offset large enough that the
82 * instruction decoding should be in sync at the interesting
83 * point, but small enough to fit on a row. The regs->erp
84 * location is pointed out in a ksymoops-friendly way by
85 * wrapping the byte for that address in parenthesises.
87 for (i
= -12; i
< 12; i
++) {
90 if (__get_user(c
, &((unsigned char *)regs
->erp
)[i
])) {
92 printk(" Bad IP value.");
105 void arch_enable_nmi(void)
109 local_save_flags(flags
);
110 flags
|= (1 << 30); /* NMI M flag is at bit 30 */
111 local_irq_restore(flags
);
114 extern void (*nmi_handler
)(struct pt_regs
*);
115 void handle_nmi(struct pt_regs
*regs
)
117 #ifdef CONFIG_ETRAXFS
118 reg_intr_vect_r_nmi r
;
124 #ifdef CONFIG_ETRAXFS
125 /* Wait until nmi is no longer active. */
127 r
= REG_RD(intr_vect
, regi_irq
, r_nmi
);
128 } while (r
.ext
== regk_intr_vect_on
);
134 extern void die_if_kernel(const char *str
, struct pt_regs
*regs
, long err
);
136 /* Copy of the regs at BUG() time. */
137 struct pt_regs BUG_regs
;
139 void do_BUG(char *file
, unsigned int line
)
141 printk("kernel BUG at %s:%d!\n", file
, line
);
142 die_if_kernel("Oops", &BUG_regs
, 0);
144 EXPORT_SYMBOL(do_BUG
);
146 void fixup_BUG(struct pt_regs
*regs
)
150 #ifdef CONFIG_DEBUG_BUGVERBOSE
152 * Fixup the BUG arguments through exception handlers.
155 const struct exception_table_entry
*fixup
;
158 * ERP points at the "break 14" + 2, compensate for the 2
161 fixup
= search_exception_tables(instruction_pointer(regs
) - 2);
163 /* Adjust the instruction pointer in the stackframe. */
164 instruction_pointer(regs
) = fixup
->fixup
;
169 /* Dont try to lookup the filename + line, just dump regs. */
170 do_BUG("unknown", 0);
175 * Break 14 handler. Save regs and jump into the fixup_BUG.
177 __asm__ ( ".text\n\t"
178 ".global breakh_BUG\n\t"
182 "move.d $sp, $r10\n\t"
185 "jump ret_from_intr\n\t"
189 #ifdef CONFIG_DEBUG_BUGVERBOSE
191 handle_BUG(struct pt_regs
*regs
)