crash_stop() headers. The common header defines the API. The
architecture headers define arch dependent state that is saved on each
cpu, this is typically the data that is required to get a decent
backtrace.
---
include/asm-i386/crash_stop.h | 14 ++++++++++
include/linux/crash_stop.h | 57 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 71 insertions(+)
Index: linux/include/asm-i386/crash_stop.h
===================================================================
--- /dev/null
+++ linux/include/asm-i386/crash_stop.h
@@ -0,0 +1,14 @@
+#ifndef _ASM_CRASH_STOP_H
+#define _ASM_CRASH_STOP_H
+
+/* CONFIG_4KSTACKS means that the registers (including eip) at the time of the
+ * interrupt can be on one stack while the crash_stop code is running on
+ * another stack. We have to save the current esp and eip.
+ */
+struct crash_stop_running_process_arch
+{
+ unsigned long esp;
+ unsigned long eip;
+};
+
+#endif /* _ASM_CRASH_STOP_H */
Index: linux/include/linux/crash_stop.h
===================================================================
--- /dev/null
+++ linux/include/linux/crash_stop.h
@@ -0,0 +1,57 @@
+#ifndef _LINUX_CRASH_STOP_H
+#define _LINUX_CRASH_STOP_H
+
+#ifdef CONFIG_CRASH_STOP_SUPPORTED
+
+#include <linux/cpumask.h>
+#include <linux/ptrace.h>
+#include <asm/crash_stop.h>
+
+typedef asmlinkage int (*printk_t)(const char * fmt, ...)
+ __attribute__ ((format (printf, 1, 2)));
+
+/* These five entries are the only ones used by code outside crash_stop itself.
+ * Anything starting with 'crash_stop' is part of the external ABI, anything
+ * starting with'cs_' is only to be used by internal crash_stop code.
+ */
+extern int crash_stop(void (*callback)(int monarch, void *data),
+ void *data, struct pt_regs *regs, printk_t print,
+ const char *text);
+extern int crash_stop_recovered(void);
+extern void crash_stop_cpu(int monarch, struct pt_regs *regs);
+extern int crash_stop_sent_nmi(void);
+struct crash_stop_running_process {
+ struct task_struct *p;
+ struct pt_regs *regs;
+ struct crash_stop_running_process *prev;
+ struct crash_stop_running_process_arch arch;
+};
+
+extern void cs_common_ipi(struct pt_regs *regs);
+extern void cs_arch_send_ipi(int);
+extern void cs_arch_send_nmi(int);
+
+extern void cs_arch_cpu(int, struct crash_stop_running_process *);
+extern void cs_common_cpu(int);
+
+extern spinlock_t cs_lock;
+extern int cs_monarch;
+extern int cs_notify_chain;
+
+struct cs_global {
+ void (*callback)(int monarch, void *data);
+ void *data;
+ printk_t print;
+};
+extern struct cs_global cs_global;
+
+#else /* !CONFIG_CRASH_STOP_SUPPORTED */
+
+#define crash_stop(callback, data, regs, print, text) {(void) data; (void)
regs; -ENOSYS}
+#define crash_stop_recovered() do {} while(0)
+#define crash_stop_cpu(monarch, regs) {(void) monarch; (void)regs}
+#define crash_stop_sent_nmi() 0
+
+#endif /* CONFIG_CRASH_STOP_SUPPORTED */
+
+#endif /* _LINUX_CRASH_STOP_H */
-
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