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-rw-r--r--arch/sparc/include/asm/kdebug_64.h2
-rw-r--r--arch/sparc/include/asm/ptrace.h35
-rw-r--r--arch/sparc/include/asm/thread_info_64.h6
-rw-r--r--arch/sparc/include/asm/ttable.h6
-rw-r--r--arch/sparc/include/asm/uprobes.h59
5 files changed, 105 insertions, 3 deletions
diff --git a/arch/sparc/include/asm/kdebug_64.h b/arch/sparc/include/asm/kdebug_64.h
index 04465de8f3b5..867286bf7b1a 100644
--- a/arch/sparc/include/asm/kdebug_64.h
+++ b/arch/sparc/include/asm/kdebug_64.h
@@ -10,6 +10,8 @@ enum die_val {
DIE_OOPS = 1,
DIE_DEBUG, /* ta 0x70 */
DIE_DEBUG_2, /* ta 0x71 */
+ DIE_BPT, /* ta 0x73 */
+ DIE_SSTEP, /* ta 0x74 */
DIE_DIE,
DIE_TRAP,
DIE_TRAP_TL1,
diff --git a/arch/sparc/include/asm/ptrace.h b/arch/sparc/include/asm/ptrace.h
index bac6a946ee00..ca57f08bd3db 100644
--- a/arch/sparc/include/asm/ptrace.h
+++ b/arch/sparc/include/asm/ptrace.h
@@ -61,7 +61,10 @@ extern union global_cpu_snapshot global_cpu_snapshot[NR_CPUS];
#define force_successful_syscall_return() set_thread_noerror(1)
#define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
#define instruction_pointer(regs) ((regs)->tpc)
-#define instruction_pointer_set(regs, val) ((regs)->tpc = (val))
+#define instruction_pointer_set(regs, val) do { \
+ (regs)->tpc = (val); \
+ (regs)->tnpc = (val)+4; \
+ } while (0)
#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
static inline int is_syscall_success(struct pt_regs *regs)
{
@@ -77,6 +80,36 @@ unsigned long profile_pc(struct pt_regs *);
#else
#define profile_pc(regs) instruction_pointer(regs)
#endif
+
+#define MAX_REG_OFFSET (offsetof(struct pt_regs, magic))
+
+extern int regs_query_register_offset(const char *name);
+
+/**
+ * regs_get_register() - get register value from its offset
+ * @regs: pt_regs from which register value is gotten
+ * @offset: offset number of the register.
+ *
+ * regs_get_register returns the value of a register whose
+ * offset from @regs. The @offset is the offset of the register
+ * in struct pt_regs. If @offset is bigger than MAX_REG_OFFSET,
+ * this returns 0.
+ */
+static inline unsigned long regs_get_register(struct pt_regs *regs,
+ unsigned long offset)
+{
+ if (unlikely(offset >= MAX_REG_OFFSET))
+ return 0;
+ if (offset == PT_V9_Y)
+ return *(unsigned int *)((unsigned long)regs + offset);
+ return *(unsigned long *)((unsigned long)regs + offset);
+}
+
+/* Valid only for Kernel mode traps. */
+static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
+{
+ return regs->u_regs[UREG_I6];
+}
#else /* __ASSEMBLY__ */
#endif /* __ASSEMBLY__ */
#else /* (defined(__sparc__) && defined(__arch64__)) */
diff --git a/arch/sparc/include/asm/thread_info_64.h b/arch/sparc/include/asm/thread_info_64.h
index 3d7b925f6516..38a24f257b85 100644
--- a/arch/sparc/include/asm/thread_info_64.h
+++ b/arch/sparc/include/asm/thread_info_64.h
@@ -180,7 +180,7 @@ register struct thread_info *current_thread_info_reg asm("g6");
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
/* flag bit 4 is available */
#define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */
-/* flag bit 6 is available */
+#define TIF_UPROBE 6 /* breakpointed or singlestepped */
#define TIF_32BIT 7 /* 32-bit binary */
#define TIF_NOHZ 8 /* in adaptive nohz mode */
#define TIF_SECCOMP 9 /* secure computing */
@@ -199,6 +199,7 @@ register struct thread_info *current_thread_info_reg asm("g6");
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_UNALIGNED (1<<TIF_UNALIGNED)
+#define _TIF_UPROBE (1<<TIF_UPROBE)
#define _TIF_32BIT (1<<TIF_32BIT)
#define _TIF_NOHZ (1<<TIF_NOHZ)
#define _TIF_SECCOMP (1<<TIF_SECCOMP)
@@ -209,7 +210,8 @@ register struct thread_info *current_thread_info_reg asm("g6");
#define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \
_TIF_DO_NOTIFY_RESUME_MASK | \
_TIF_NEED_RESCHED)
-#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING)
+#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \
+ _TIF_SIGPENDING | _TIF_UPROBE)
#define is_32bit_task() (test_thread_flag(TIF_32BIT))
diff --git a/arch/sparc/include/asm/ttable.h b/arch/sparc/include/asm/ttable.h
index 781b9f1dbdc2..82e7df296abc 100644
--- a/arch/sparc/include/asm/ttable.h
+++ b/arch/sparc/include/asm/ttable.h
@@ -186,6 +186,12 @@
#define KPROBES_TRAP(lvl) TRAP_ARG(bad_trap, lvl)
#endif
+#ifdef CONFIG_UPROBES
+#define UPROBES_TRAP(lvl) TRAP_ARG(uprobe_trap, lvl)
+#else
+#define UPROBES_TRAP(lvl) TRAP_ARG(bad_trap, lvl)
+#endif
+
#ifdef CONFIG_KGDB
#define KGDB_TRAP(lvl) TRAP_IRQ(kgdb_trap, lvl)
#else
diff --git a/arch/sparc/include/asm/uprobes.h b/arch/sparc/include/asm/uprobes.h
new file mode 100644
index 000000000000..f87aae5a908e
--- /dev/null
+++ b/arch/sparc/include/asm/uprobes.h
@@ -0,0 +1,59 @@
+#ifndef _ASM_UPROBES_H
+#define _ASM_UPROBES_H
+/*
+ * User-space Probes (UProbes) for sparc
+ *
+ * Copyright (C) 2013 Oracle, Inc.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ * Jose E. Marchesi <jose.marchesi@oracle.com>
+ * Eric Saint Etienne <eric.saint.etienne@oracle.com>
+ */
+
+typedef u32 uprobe_opcode_t;
+
+#define MAX_UINSN_BYTES 4
+#define UPROBE_XOL_SLOT_BYTES (MAX_UINSN_BYTES * 2)
+
+#define UPROBE_SWBP_INSN_SIZE 4
+#define UPROBE_SWBP_INSN 0x91d02073 /* ta 0x73 */
+#define UPROBE_STP_INSN 0x91d02074 /* ta 0x74 */
+
+#define ANNUL_BIT (1 << 29)
+
+struct arch_uprobe {
+ union {
+ u8 insn[MAX_UINSN_BYTES];
+ u32 ixol;
+ };
+};
+
+struct arch_uprobe_task {
+ u32 saved_tpc;
+ u32 saved_tnpc;
+};
+
+struct task_struct;
+struct notifier_block;
+
+extern int arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long addr);
+extern int arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs);
+extern int arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs);
+extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk);
+extern int arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data);
+extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs);
+
+#endif /* _ASM_UPROBES_H */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 04:24:27 +0000