This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-s390 / kprobes.h

diff --git a/include/asm-s390/kprobes.h b/include/asm-s390/kprobes.h
new file mode 100644 (file)
index 0000000..b847ff0
--- /dev/null
+++ b/include/asm-s390/kprobes.h
@@ -0,0 +1,114 @@
+#ifndef _ASM_S390_KPROBES_H
+#define _ASM_S390_KPROBES_H
+/*
+ *  Kernel Probes (KProbes)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) IBM Corporation, 2002, 2006
+ *
+ * 2002-Oct    Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
+ *             Probes initial implementation ( includes suggestions from
+ *             Rusty Russell).
+ * 2004-Nov    Modified for PPC64 by Ananth N Mavinakayanahalli
+ *             <ananth@in.ibm.com>
+ * 2005-Dec    Used as a template for s390 by Mike Grundy
+ *             <grundym@us.ibm.com>
+ */
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/percpu.h>
+
+#define  __ARCH_WANT_KPROBES_INSN_SLOT
+struct pt_regs;
+struct kprobe;
+
+typedef u16 kprobe_opcode_t;
+#define BREAKPOINT_INSTRUCTION 0x0002
+
+/* Maximum instruction size is 3 (16bit) halfwords: */
+#define MAX_INSN_SIZE          0x0003
+#define MAX_STACK_SIZE         64
+#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
+       (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \
+       ? (MAX_STACK_SIZE) \
+       : (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR)))
+
+#define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)(pentry)
+
+#define ARCH_SUPPORTS_KRETPROBES
+#define ARCH_INACTIVE_KPROBE_COUNT 0
+
+#define KPROBE_SWAP_INST       0x10
+
+#define FIXUP_PSW_NORMAL       0x08
+#define FIXUP_BRANCH_NOT_TAKEN 0x04
+#define FIXUP_RETURN_REGISTER  0x02
+#define FIXUP_NOT_REQUIRED     0x01
+
+/* Architecture specific copy of original instruction */
+struct arch_specific_insn {
+       /* copy of original instruction */
+       kprobe_opcode_t *insn;
+       int fixup;
+       int ilen;
+       int reg;
+};
+
+struct ins_replace_args {
+       kprobe_opcode_t *ptr;
+       kprobe_opcode_t old;
+       kprobe_opcode_t new;
+};
+struct prev_kprobe {
+       struct kprobe *kp;
+       unsigned long status;
+       unsigned long saved_psw;
+       unsigned long kprobe_saved_imask;
+       unsigned long kprobe_saved_ctl[3];
+};
+
+/* per-cpu kprobe control block */
+struct kprobe_ctlblk {
+       unsigned long kprobe_status;
+       unsigned long kprobe_saved_imask;
+       unsigned long kprobe_saved_ctl[3];
+       struct pt_regs jprobe_saved_regs;
+       unsigned long jprobe_saved_r14;
+       unsigned long jprobe_saved_r15;
+       struct prev_kprobe prev_kprobe;
+       kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
+};
+
+void arch_remove_kprobe(struct kprobe *p);
+void kretprobe_trampoline(void);
+int  is_prohibited_opcode(kprobe_opcode_t *instruction);
+void get_instruction_type(struct arch_specific_insn *ainsn);
+
+#define flush_insn_slot(p)     do { } while (0)
+
+#endif /* _ASM_S390_KPROBES_H */
+
+#ifdef CONFIG_KPROBES
+
+extern int kprobe_exceptions_notify(struct notifier_block *self,
+                                       unsigned long val, void *data);
+#else  /* !CONFIG_KPROBES */
+static inline int kprobe_exceptions_notify(struct notifier_block *self,
+                                               unsigned long val, void *data)
+{
+       return 0;
+}
+#endif