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-rw-r--r--arch/sparc/include/asm/kdebug_32.h75
1 files changed, 75 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/kdebug_32.h b/arch/sparc/include/asm/kdebug_32.h
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+++ b/arch/sparc/include/asm/kdebug_32.h
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * kdebug.h: Defines and definitions for debugging the Linux kernel
+ * under various kernel debuggers.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+#ifndef _SPARC_KDEBUG_H
+#define _SPARC_KDEBUG_H
+
+#include <asm/openprom.h>
+#include <asm/vaddrs.h>
+
+/* Breakpoints are enter through trap table entry 126. So in sparc assembly
+ * if you want to drop into the debugger you do:
+ *
+ * t DEBUG_BP_TRAP
+ */
+
+#define DEBUG_BP_TRAP 126
+
+#ifndef __ASSEMBLY__
+/* The debug vector is passed in %o1 at boot time. It is a pointer to
+ * a structure in the debuggers address space. Here is its format.
+ */
+
+typedef unsigned int (*debugger_funct)(void);
+
+struct kernel_debug {
+ /* First the entry point into the debugger. You jump here
+ * to give control over to the debugger.
+ */
+ unsigned long kdebug_entry;
+ unsigned long kdebug_trapme; /* Figure out later... */
+ /* The following is the number of pages that the debugger has
+ * taken from to total pool.
+ */
+ unsigned long *kdebug_stolen_pages;
+ /* Ok, after you remap yourself and/or change the trap table
+ * from what you were left with at boot time you have to call
+ * this synchronization function so the debugger can check out
+ * what you have done.
+ */
+ debugger_funct teach_debugger;
+}; /* I think that is it... */
+
+extern struct kernel_debug *linux_dbvec;
+
+/* Use this macro in C-code to enter the debugger. */
+static inline void sp_enter_debugger(void)
+{
+ __asm__ __volatile__("jmpl %0, %%o7\n\t"
+ "nop\n\t" : :
+ "r" (linux_dbvec) : "o7", "memory");
+}
+
+#define SP_ENTER_DEBUGGER do { \
+ if((linux_dbvec!=0) && ((*(short *)linux_dbvec)!=-1)) \
+ sp_enter_debugger(); \
+ } while(0)
+
+enum die_val {
+ DIE_UNUSED,
+ DIE_OOPS,
+};
+
+#endif /* !(__ASSEMBLY__) */
+
+/* Some nice offset defines for assembler code. */
+#define KDEBUG_ENTRY_OFF 0x0
+#define KDEBUG_DUNNO_OFF 0x4
+#define KDEBUG_DUNNO2_OFF 0x8
+#define KDEBUG_TEACH_OFF 0xc
+
+#endif /* !(_SPARC_KDEBUG_H) */