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authorSebastian Siewior <bigeasy@linutronix.de>2008-05-09 10:13:36 -0400
committerGreg Ungerer <gerg@uclinux.org>2008-07-23 01:11:28 -0400
commit1fda83d83c664ad74bfec8ce093a86d4d962f093 (patch)
treef050f48faa721b72dcb288c3045625cfcdc31f01 /arch
parent5732b38ddb770b98110ea218232fc072e5626b87 (diff)
m68knommu: m68knommu: add old stack trace method
The old method is used when frame pointers are not available. Also fix formating with CONFIG_KALLSYMS=n which eliminates \n. Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/m68knommu/kernel/traps.c38
1 files changed, 35 insertions, 3 deletions
diff --git a/arch/m68knommu/kernel/traps.c b/arch/m68knommu/kernel/traps.c
index ec9aea652e79..46f8f9d0c408 100644
--- a/arch/m68knommu/kernel/traps.c
+++ b/arch/m68knommu/kernel/traps.c
@@ -103,12 +103,28 @@ asmlinkage void buserr_c(struct frame *fp)
103 force_sig(SIGSEGV, current); 103 force_sig(SIGSEGV, current);
104} 104}
105 105
106static void print_this_address(unsigned long addr, int i)
107{
108#ifdef CONFIG_KALLSYMS
109 printk(KERN_EMERG " [%08lx] ", addr);
110 print_symbol(KERN_CONT "%s\n", addr);
111#else
112 if (i % 5)
113 printk(KERN_CONT " [%08lx] ", addr);
114 else
115 printk(KERN_CONT "\n" KERN_EMERG " [%08lx] ", addr);
116 i++;
117#endif
118}
119
106int kstack_depth_to_print = 48; 120int kstack_depth_to_print = 48;
107 121
108static void __show_stack(struct task_struct *task, unsigned long *stack) 122static void __show_stack(struct task_struct *task, unsigned long *stack)
109{ 123{
110 unsigned long *endstack, addr; 124 unsigned long *endstack, addr;
125#ifdef CONFIG_FRAME_POINTER
111 unsigned long *last_stack; 126 unsigned long *last_stack;
127#endif
112 int i; 128 int i;
113 129
114 if (!stack) 130 if (!stack)
@@ -126,6 +142,7 @@ static void __show_stack(struct task_struct *task, unsigned long *stack)
126 printk(" %08lx", *(stack + i)); 142 printk(" %08lx", *(stack + i));
127 } 143 }
128 printk("\n"); 144 printk("\n");
145 i = 0;
129 146
130#ifdef CONFIG_FRAME_POINTER 147#ifdef CONFIG_FRAME_POINTER
131 printk(KERN_EMERG "Call Trace:\n"); 148 printk(KERN_EMERG "Call Trace:\n");
@@ -134,15 +151,30 @@ static void __show_stack(struct task_struct *task, unsigned long *stack)
134 while (stack <= endstack && stack > last_stack) { 151 while (stack <= endstack && stack > last_stack) {
135 152
136 addr = *(stack + 1); 153 addr = *(stack + 1);
137 printk(KERN_EMERG " [%08lx] ", addr); 154 print_this_address(addr, i);
138 print_symbol(KERN_CONT "%s\n", addr); 155 i++;
139 156
140 last_stack = stack; 157 last_stack = stack;
141 stack = (unsigned long *)*stack; 158 stack = (unsigned long *)*stack;
142 } 159 }
143 printk("\n"); 160 printk("\n");
144#else 161#else
145 printk(KERN_EMERG "CONFIG_FRAME_POINTER disabled, no symbolic call trace\n"); 162 printk(KERN_EMERG "Call Trace with CONFIG_FRAME_POINTER disabled:\n");
163 while (stack <= endstack) {
164 addr = *stack++;
165 /*
166 * If the address is either in the text segment of the kernel,
167 * or in a region which is occupied by a module then it *may*
168 * be the address of a calling routine; if so, print it so that
169 * someone tracing down the cause of the crash will be able to
170 * figure out the call path that was taken.
171 */
172 if (__kernel_text_address(addr)) {
173 print_this_address(addr, i);
174 i++;
175 }
176 }
177 printk(KERN_CONT "\n");
146#endif 178#endif
147} 179}
148 180