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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/powerpc/include/asm/kprobes.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/powerpc/include/asm/kprobes.h')
-rw-r--r--kernel/arch/powerpc/include/asm/kprobes.h133
1 files changed, 133 insertions, 0 deletions
diff --git a/kernel/arch/powerpc/include/asm/kprobes.h b/kernel/arch/powerpc/include/asm/kprobes.h
new file mode 100644
index 000000000..039b583db
--- /dev/null
+++ b/kernel/arch/powerpc/include/asm/kprobes.h
@@ -0,0 +1,133 @@
+#ifndef _ASM_POWERPC_KPROBES_H
+#define _ASM_POWERPC_KPROBES_H
+#ifdef __KERNEL__
+/*
+ * 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, 2004
+ *
+ * 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>
+ */
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/percpu.h>
+#include <asm/probes.h>
+#include <asm/code-patching.h>
+
+#define __ARCH_WANT_KPROBES_INSN_SLOT
+
+struct pt_regs;
+struct kprobe;
+
+typedef ppc_opcode_t kprobe_opcode_t;
+#define MAX_INSN_SIZE 1
+
+#ifdef CONFIG_PPC64
+#if defined(_CALL_ELF) && _CALL_ELF == 2
+/* PPC64 ABIv2 needs local entry point */
+#define kprobe_lookup_name(name, addr) \
+{ \
+ addr = (kprobe_opcode_t *)kallsyms_lookup_name(name); \
+ if (addr) \
+ addr = (kprobe_opcode_t *)ppc_function_entry(addr); \
+}
+#else
+/*
+ * 64bit powerpc ABIv1 uses function descriptors:
+ * - Check for the dot variant of the symbol first.
+ * - If that fails, try looking up the symbol provided.
+ *
+ * This ensures we always get to the actual symbol and not the descriptor.
+ * Also handle <module:symbol> format.
+ */
+#define kprobe_lookup_name(name, addr) \
+{ \
+ char dot_name[MODULE_NAME_LEN + 1 + KSYM_NAME_LEN]; \
+ char *modsym; \
+ bool dot_appended = false; \
+ if ((modsym = strchr(name, ':')) != NULL) { \
+ modsym++; \
+ if (*modsym != '\0' && *modsym != '.') { \
+ /* Convert to <module:.symbol> */ \
+ strncpy(dot_name, name, modsym - name); \
+ dot_name[modsym - name] = '.'; \
+ dot_name[modsym - name + 1] = '\0'; \
+ strncat(dot_name, modsym, \
+ sizeof(dot_name) - (modsym - name) - 2);\
+ dot_appended = true; \
+ } else { \
+ dot_name[0] = '\0'; \
+ strncat(dot_name, name, sizeof(dot_name) - 1); \
+ } \
+ } else if (name[0] != '.') { \
+ dot_name[0] = '.'; \
+ dot_name[1] = '\0'; \
+ strncat(dot_name, name, KSYM_NAME_LEN - 2); \
+ dot_appended = true; \
+ } else { \
+ dot_name[0] = '\0'; \
+ strncat(dot_name, name, KSYM_NAME_LEN - 1); \
+ } \
+ addr = (kprobe_opcode_t *)kallsyms_lookup_name(dot_name); \
+ if (!addr && dot_appended) { \
+ /* Let's try the original non-dot symbol lookup */ \
+ addr = (kprobe_opcode_t *)kallsyms_lookup_name(name); \
+ } \
+}
+#endif /* defined(_CALL_ELF) && _CALL_ELF == 2 */
+#endif /* CONFIG_PPC64 */
+
+#define flush_insn_slot(p) do { } while (0)
+#define kretprobe_blacklist_size 0
+
+void kretprobe_trampoline(void);
+extern void arch_remove_kprobe(struct kprobe *p);
+
+/* Architecture specific copy of original instruction */
+struct arch_specific_insn {
+ /* copy of original instruction */
+ kprobe_opcode_t *insn;
+ /*
+ * Set in kprobes code, initially to 0. If the instruction can be
+ * eumulated, this is set to 1, if not, to -1.
+ */
+ int boostable;
+};
+
+struct prev_kprobe {
+ struct kprobe *kp;
+ unsigned long status;
+ unsigned long saved_msr;
+};
+
+/* per-cpu kprobe control block */
+struct kprobe_ctlblk {
+ unsigned long kprobe_status;
+ unsigned long kprobe_saved_msr;
+ struct pt_regs jprobe_saved_regs;
+ struct prev_kprobe prev_kprobe;
+};
+
+extern int kprobe_exceptions_notify(struct notifier_block *self,
+ unsigned long val, void *data);
+extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_KPROBES_H */