Merge branch 'stanton-cs1-driver' of git://git.alsa-project.org/alsa-kprivate into...
[linux-drm-fsl-dcu.git] / arch / x86 / um / sysrq_32.c
1 /*
2  * Copyright (C) 2001 - 2003 Jeff Dike (jdike@addtoit.com)
3  * Licensed under the GPL
4  */
5
6 #include <linux/kernel.h>
7 #include <linux/smp.h>
8 #include <linux/sched.h>
9 #include <linux/kallsyms.h>
10 #include <asm/ptrace.h>
11 #include <asm/sysrq.h>
12
13 /* This is declared by <linux/sched.h> */
14 void show_regs(struct pt_regs *regs)
15 {
16         printk("\n");
17         printk("EIP: %04lx:[<%08lx>] CPU: %d %s", 
18                0xffff & PT_REGS_CS(regs), PT_REGS_IP(regs),
19                smp_processor_id(), print_tainted());
20         if (PT_REGS_CS(regs) & 3)
21                 printk(" ESP: %04lx:%08lx", 0xffff & PT_REGS_SS(regs),
22                        PT_REGS_SP(regs));
23         printk(" EFLAGS: %08lx\n    %s\n", PT_REGS_EFLAGS(regs),
24                print_tainted());
25         printk("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n",
26                PT_REGS_AX(regs), PT_REGS_BX(regs), 
27                PT_REGS_CX(regs), PT_REGS_DX(regs));
28         printk("ESI: %08lx EDI: %08lx EBP: %08lx",
29                PT_REGS_SI(regs), PT_REGS_DI(regs), PT_REGS_BP(regs));
30         printk(" DS: %04lx ES: %04lx\n",
31                0xffff & PT_REGS_DS(regs), 
32                0xffff & PT_REGS_ES(regs));
33
34         show_trace(NULL, (unsigned long *) &regs);
35 }
36
37 /* Copied from i386. */
38 static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
39 {
40         return  p > (void *)tinfo &&
41                 p < (void *)tinfo + THREAD_SIZE - 3;
42 }
43
44 /* Adapted from i386 (we also print the address we read from). */
45 static inline unsigned long print_context_stack(struct thread_info *tinfo,
46                                 unsigned long *stack, unsigned long ebp)
47 {
48         unsigned long addr;
49
50 #ifdef CONFIG_FRAME_POINTER
51         while (valid_stack_ptr(tinfo, (void *)ebp)) {
52                 addr = *(unsigned long *)(ebp + 4);
53                 printk("%08lx:  [<%08lx>]", ebp + 4, addr);
54                 print_symbol(" %s", addr);
55                 printk("\n");
56                 ebp = *(unsigned long *)ebp;
57         }
58 #else
59         while (valid_stack_ptr(tinfo, stack)) {
60                 addr = *stack;
61                 if (__kernel_text_address(addr)) {
62                         printk("%08lx:  [<%08lx>]", (unsigned long) stack, addr);
63                         print_symbol(" %s", addr);
64                         printk("\n");
65                 }
66                 stack++;
67         }
68 #endif
69         return ebp;
70 }
71
72 void show_trace(struct task_struct* task, unsigned long * stack)
73 {
74         unsigned long ebp;
75         struct thread_info *context;
76
77         /* Turn this into BUG_ON if possible. */
78         if (!stack) {
79                 stack = (unsigned long*) &stack;
80                 printk("show_trace: got NULL stack, implicit assumption task == current");
81                 WARN_ON(1);
82         }
83
84         if (!task)
85                 task = current;
86
87         if (task != current) {
88                 ebp = (unsigned long) KSTK_EBP(task);
89         } else {
90                 asm ("movl %%ebp, %0" : "=r" (ebp) : );
91         }
92
93         context = (struct thread_info *)
94                 ((unsigned long)stack & (~(THREAD_SIZE - 1)));
95         print_context_stack(context, stack, ebp);
96
97         printk("\n");
98 }
99