From a36159eec6ca17402b0e146b86efaf76568dc353 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 20 Sep 2024 01:41:23 +0000
Subject: [PATCH] 重命名 AX88772C_eeprom/asix.c 为 asix_mac.c
---
kernel/arch/s390/kernel/stacktrace.c | 112 ++++++++++++++++++++++++++------------------------------
1 files changed, 52 insertions(+), 60 deletions(-)
diff --git a/kernel/arch/s390/kernel/stacktrace.c b/kernel/arch/s390/kernel/stacktrace.c
index 460dcfb..7f1266c 100644
--- a/kernel/arch/s390/kernel/stacktrace.c
+++ b/kernel/arch/s390/kernel/stacktrace.c
@@ -6,70 +6,62 @@
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
*/
-#include <linux/sched.h>
-#include <linux/sched/debug.h>
#include <linux/stacktrace.h>
-#include <linux/kallsyms.h>
-#include <linux/export.h>
+#include <asm/stacktrace.h>
+#include <asm/unwind.h>
+#include <asm/kprobes.h>
-static int __save_address(void *data, unsigned long address, int nosched)
+void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie,
+ struct task_struct *task, struct pt_regs *regs)
{
- struct stack_trace *trace = data;
+ struct unwind_state state;
+ unsigned long addr;
- if (nosched && in_sched_functions(address))
- return 0;
- if (trace->skip > 0) {
- trace->skip--;
- return 0;
+ unwind_for_each_frame(&state, task, regs, 0) {
+ addr = unwind_get_return_address(&state);
+ if (!addr || !consume_entry(cookie, addr))
+ break;
}
- if (trace->nr_entries < trace->max_entries) {
- trace->entries[trace->nr_entries++] = address;
- return 0;
+}
+
+/*
+ * This function returns an error if it detects any unreliable features of the
+ * stack. Otherwise it guarantees that the stack trace is reliable.
+ *
+ * If the task is not 'current', the caller *must* ensure the task is inactive.
+ */
+int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry,
+ void *cookie, struct task_struct *task)
+{
+ struct unwind_state state;
+ unsigned long addr;
+
+ unwind_for_each_frame(&state, task, NULL, 0) {
+ if (state.stack_info.type != STACK_TYPE_TASK)
+ return -EINVAL;
+
+ if (state.regs)
+ return -EINVAL;
+
+ addr = unwind_get_return_address(&state);
+ if (!addr)
+ return -EINVAL;
+
+#ifdef CONFIG_KPROBES
+ /*
+ * Mark stacktraces with kretprobed functions on them
+ * as unreliable.
+ */
+ if (state.ip == (unsigned long)kretprobe_trampoline)
+ return -EINVAL;
+#endif
+
+ if (!consume_entry(cookie, addr))
+ return -EINVAL;
}
- return 1;
+
+ /* Check for stack corruption */
+ if (unwind_error(&state))
+ return -EINVAL;
+ return 0;
}
-
-static int save_address(void *data, unsigned long address, int reliable)
-{
- return __save_address(data, address, 0);
-}
-
-static int save_address_nosched(void *data, unsigned long address, int reliable)
-{
- return __save_address(data, address, 1);
-}
-
-void save_stack_trace(struct stack_trace *trace)
-{
- unsigned long sp;
-
- sp = current_stack_pointer();
- dump_trace(save_address, trace, NULL, sp);
- if (trace->nr_entries < trace->max_entries)
- trace->entries[trace->nr_entries++] = ULONG_MAX;
-}
-EXPORT_SYMBOL_GPL(save_stack_trace);
-
-void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
-{
- unsigned long sp;
-
- sp = tsk->thread.ksp;
- if (tsk == current)
- sp = current_stack_pointer();
- dump_trace(save_address_nosched, trace, tsk, sp);
- if (trace->nr_entries < trace->max_entries)
- trace->entries[trace->nr_entries++] = ULONG_MAX;
-}
-EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
-
-void save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
-{
- unsigned long sp;
-
- sp = kernel_stack_pointer(regs);
- dump_trace(save_address, trace, NULL, sp);
- if (trace->nr_entries < trace->max_entries)
- trace->entries[trace->nr_entries++] = ULONG_MAX;
-}
-EXPORT_SYMBOL_GPL(save_stack_trace_regs);
--
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