From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 arch/sh/include/asm/ptrace.h | 117 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 arch/sh/include/asm/ptrace.h

(limited to 'arch/sh/include/asm/ptrace.h')

diff --git a/arch/sh/include/asm/ptrace.h b/arch/sh/include/asm/ptrace.h
new file mode 100644
index 000000000..2506c7db7
--- /dev/null
+++ b/arch/sh/include/asm/ptrace.h
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 1999, 2000  Niibe Yutaka
+ */
+#ifndef __ASM_SH_PTRACE_H
+#define __ASM_SH_PTRACE_H
+
+
+#include <linux/stringify.h>
+#include <linux/stddef.h>
+#include <linux/thread_info.h>
+#include <asm/addrspace.h>
+#include <asm/page.h>
+#include <uapi/asm/ptrace.h>
+
+#define user_mode(regs)			(((regs)->sr & 0x40000000)==0)
+#define kernel_stack_pointer(_regs)	((unsigned long)(_regs)->regs[15])
+
+#define GET_FP(regs)	((regs)->regs[14])
+#define GET_USP(regs)	((regs)->regs[15])
+
+#define arch_has_single_step()	(1)
+
+/*
+ * kprobe-based event tracer support
+ */
+struct pt_regs_offset {
+	const char *name;
+	int offset;
+};
+
+#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
+#define REGS_OFFSET_NAME(num)	\
+	{.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])}
+#define TREGS_OFFSET_NAME(num)	\
+	{.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])}
+#define REG_OFFSET_END {.name = NULL, .offset = 0}
+
+/* Query offset/name of register from its name/offset */
+extern int regs_query_register_offset(const char *name);
+extern const char *regs_query_register_name(unsigned int offset);
+
+extern const struct pt_regs_offset regoffset_table[];
+
+/**
+ * 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. The @offset is the
+ * offset of the register in struct pt_regs address which specified by @regs.
+ * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
+ */
+static inline unsigned long regs_get_register(struct pt_regs *regs,
+					      unsigned int offset)
+{
+	if (unlikely(offset > MAX_REG_OFFSET))
+		return 0;
+	return *(unsigned long *)((unsigned long)regs + offset);
+}
+
+/**
+ * regs_within_kernel_stack() - check the address in the stack
+ * @regs:	pt_regs which contains kernel stack pointer.
+ * @addr:	address which is checked.
+ *
+ * regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
+ * If @addr is within the kernel stack, it returns true. If not, returns false.
+ */
+static inline int regs_within_kernel_stack(struct pt_regs *regs,
+					   unsigned long addr)
+{
+	return ((addr & ~(THREAD_SIZE - 1))  ==
+		(kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
+}
+
+/**
+ * regs_get_kernel_stack_nth() - get Nth entry of the stack
+ * @regs:	pt_regs which contains kernel stack pointer.
+ * @n:		stack entry number.
+ *
+ * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
+ * is specified by @regs. If the @n th entry is NOT in the kernel stack,
+ * this returns 0.
+ */
+static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
+						      unsigned int n)
+{
+	unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
+	addr += n;
+	if (regs_within_kernel_stack(regs, (unsigned long)addr))
+		return *addr;
+	else
+		return 0;
+}
+
+struct perf_event;
+struct perf_sample_data;
+
+extern void ptrace_triggered(struct perf_event *bp,
+		      struct perf_sample_data *data, struct pt_regs *regs);
+
+#define task_pt_regs(task) \
+	((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
+
+static inline unsigned long profile_pc(struct pt_regs *regs)
+{
+	unsigned long pc = regs->pc;
+
+	if (virt_addr_uncached(pc))
+		return CAC_ADDR(pc);
+
+	return pc;
+}
+#define profile_pc profile_pc
+
+#include <asm-generic/ptrace.h>
+#endif /* __ASM_SH_PTRACE_H */
-- 
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