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-rw-r--r--arch/x86/include/asm/stacktrace.h36
-rw-r--r--arch/x86/kernel/dumpstack.c86
-rw-r--r--arch/x86/kernel/dumpstack_32.c35
-rw-r--r--arch/x86/kernel/dumpstack_64.c69
4 files changed, 0 insertions, 226 deletions
diff --git a/arch/x86/include/asm/stacktrace.h b/arch/x86/include/asm/stacktrace.h
index c9ccf0676ca6..37f2e0b377ad 100644
--- a/arch/x86/include/asm/stacktrace.h
+++ b/arch/x86/include/asm/stacktrace.h
@@ -45,42 +45,6 @@ static inline bool on_stack(struct stack_info *info, void *addr, size_t len)
45 45
46extern int kstack_depth_to_print; 46extern int kstack_depth_to_print;
47 47
48struct thread_info;
49struct stacktrace_ops;
50
51typedef unsigned long (*walk_stack_t)(struct task_struct *task,
52 unsigned long *stack,
53 unsigned long bp,
54 const struct stacktrace_ops *ops,
55 void *data,
56 struct stack_info *info,
57 int *graph);
58
59extern unsigned long
60print_context_stack(struct task_struct *task,
61 unsigned long *stack, unsigned long bp,
62 const struct stacktrace_ops *ops, void *data,
63 struct stack_info *info, int *graph);
64
65extern unsigned long
66print_context_stack_bp(struct task_struct *task,
67 unsigned long *stack, unsigned long bp,
68 const struct stacktrace_ops *ops, void *data,
69 struct stack_info *info, int *graph);
70
71/* Generic stack tracer with callbacks */
72
73struct stacktrace_ops {
74 int (*address)(void *data, unsigned long address, int reliable);
75 /* On negative return stop dumping */
76 int (*stack)(void *data, const char *name);
77 walk_stack_t walk_stack;
78};
79
80void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
81 unsigned long *stack, unsigned long bp,
82 const struct stacktrace_ops *ops, void *data);
83
84#ifdef CONFIG_X86_32 48#ifdef CONFIG_X86_32
85#define STACKSLOTS_PER_LINE 8 49#define STACKSLOTS_PER_LINE 8
86#else 50#else
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index c08f32ab8ace..999de3b3f7f4 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -56,92 +56,6 @@ void printk_address(unsigned long address)
56 pr_cont(" [<%p>] %pS\n", (void *)address, (void *)address); 56 pr_cont(" [<%p>] %pS\n", (void *)address, (void *)address);
57} 57}
58 58
59/*
60 * x86-64 can have up to three kernel stacks:
61 * process stack
62 * interrupt stack
63 * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
64 */
65
66unsigned long
67print_context_stack(struct task_struct *task,
68 unsigned long *stack, unsigned long bp,
69 const struct stacktrace_ops *ops, void *data,
70 struct stack_info *info, int *graph)
71{
72 struct stack_frame *frame = (struct stack_frame *)bp;
73
74 /*
75 * If we overflowed the stack into a guard page, jump back to the
76 * bottom of the usable stack.
77 */
78 if ((unsigned long)task_stack_page(task) - (unsigned long)stack <
79 PAGE_SIZE)
80 stack = (unsigned long *)task_stack_page(task);
81
82 while (on_stack(info, stack, sizeof(*stack))) {
83 unsigned long addr = *stack;
84
85 if (__kernel_text_address(addr)) {
86 unsigned long real_addr;
87 int reliable = 0;
88
89 if ((unsigned long) stack == bp + sizeof(long)) {
90 reliable = 1;
91 frame = frame->next_frame;
92 bp = (unsigned long) frame;
93 }
94
95 /*
96 * When function graph tracing is enabled for a
97 * function, its return address on the stack is
98 * replaced with the address of an ftrace handler
99 * (return_to_handler). In that case, before printing
100 * the "real" address, we want to print the handler
101 * address as an "unreliable" hint that function graph
102 * tracing was involved.
103 */
104 real_addr = ftrace_graph_ret_addr(task, graph, addr,
105 stack);
106 if (real_addr != addr)
107 ops->address(data, addr, 0);
108
109 ops->address(data, real_addr, reliable);
110 }
111 stack++;
112 }
113 return bp;
114}
115EXPORT_SYMBOL_GPL(print_context_stack);
116
117unsigned long
118print_context_stack_bp(struct task_struct *task,
119 unsigned long *stack, unsigned long bp,
120 const struct stacktrace_ops *ops, void *data,
121 struct stack_info *info, int *graph)
122{
123 struct stack_frame *frame = (struct stack_frame *)bp;
124 unsigned long *retp = &frame->return_address;
125
126 while (on_stack(info, stack, sizeof(*stack) * 2)) {
127 unsigned long addr = *retp;
128 unsigned long real_addr;
129
130 if (!__kernel_text_address(addr))
131 break;
132
133 real_addr = ftrace_graph_ret_addr(task, graph, addr, retp);
134 if (ops->address(data, real_addr, 1))
135 break;
136
137 frame = frame->next_frame;
138 retp = &frame->return_address;
139 }
140
141 return (unsigned long)frame;
142}
143EXPORT_SYMBOL_GPL(print_context_stack_bp);
144
145void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs, 59void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
146 unsigned long *stack, char *log_lvl) 60 unsigned long *stack, char *log_lvl)
147{ 61{
diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c
index e476eb774278..06eb322b5f9f 100644
--- a/arch/x86/kernel/dumpstack_32.c
+++ b/arch/x86/kernel/dumpstack_32.c
@@ -121,41 +121,6 @@ unknown:
121 return -EINVAL; 121 return -EINVAL;
122} 122}
123 123
124void dump_trace(struct task_struct *task, struct pt_regs *regs,
125 unsigned long *stack, unsigned long bp,
126 const struct stacktrace_ops *ops, void *data)
127{
128 unsigned long visit_mask = 0;
129 int graph = 0;
130
131 task = task ? : current;
132 stack = stack ? : get_stack_pointer(task, regs);
133 bp = bp ? : (unsigned long)get_frame_pointer(task, regs);
134
135 for (;;) {
136 const char *begin_str, *end_str;
137 struct stack_info info;
138
139 if (get_stack_info(stack, task, &info, &visit_mask))
140 break;
141
142 stack_type_str(info.type, &begin_str, &end_str);
143
144 if (begin_str && ops->stack(data, begin_str) < 0)
145 break;
146
147 bp = ops->walk_stack(task, stack, bp, ops, data, &info, &graph);
148
149 if (end_str && ops->stack(data, end_str) < 0)
150 break;
151
152 stack = info.next_sp;
153
154 touch_nmi_watchdog();
155 }
156}
157EXPORT_SYMBOL(dump_trace);
158
159void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs, 124void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
160 unsigned long *sp, char *log_lvl) 125 unsigned long *sp, char *log_lvl)
161{ 126{
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index 4e9f2cf64ac8..36cf1a498227 100644
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -140,75 +140,6 @@ unknown:
140 return -EINVAL; 140 return -EINVAL;
141} 141}
142 142
143/*
144 * x86-64 can have up to three kernel stacks:
145 * process stack
146 * interrupt stack
147 * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
148 */
149
150void dump_trace(struct task_struct *task, struct pt_regs *regs,
151 unsigned long *stack, unsigned long bp,
152 const struct stacktrace_ops *ops, void *data)
153{
154 unsigned long visit_mask = 0;
155 struct stack_info info;
156 int graph = 0;
157 int done = 0;
158
159 task = task ? : current;
160 stack = stack ? : get_stack_pointer(task, regs);
161 bp = bp ? : (unsigned long)get_frame_pointer(task, regs);
162
163 /*
164 * Print function call entries in all stacks, starting at the
165 * current stack address. If the stacks consist of nested
166 * exceptions
167 */
168 while (!done) {
169 const char *begin_str, *end_str;
170
171 get_stack_info(stack, task, &info, &visit_mask);
172
173 /* Default finish unless specified to continue */
174 done = 1;
175
176 switch (info.type) {
177
178 /* Break out early if we are on the thread stack */
179 case STACK_TYPE_TASK:
180 break;
181
182 case STACK_TYPE_IRQ:
183 case STACK_TYPE_EXCEPTION ... STACK_TYPE_EXCEPTION_LAST:
184
185 stack_type_str(info.type, &begin_str, &end_str);
186
187 if (ops->stack(data, begin_str) < 0)
188 break;
189
190 bp = ops->walk_stack(task, stack, bp, ops,
191 data, &info, &graph);
192
193 ops->stack(data, end_str);
194
195 stack = info.next_sp;
196 done = 0;
197 break;
198
199 default:
200 ops->stack(data, "UNK");
201 break;
202 }
203 }
204
205 /*
206 * This handles the process stack:
207 */
208 bp = ops->walk_stack(task, stack, bp, ops, data, &info, &graph);
209}
210EXPORT_SYMBOL(dump_trace);
211
212void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs, 143void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
213 unsigned long *sp, char *log_lvl) 144 unsigned long *sp, char *log_lvl)
214{ 145{
generated by cgit v1.2.2 (git 2.25.0) at 2025-06-11 23:32:12 -0400