/*
* Copyright (C) 1999, 2000 Niibe Yutaka
- *
- */
-#if defined(__SH5__)
-struct pt_regs {
- unsigned long long pc;
- unsigned long long sr;
- long long syscall_nr;
- unsigned long long regs[63];
- unsigned long long tregs[8];
- unsigned long long pad[2];
-};
-#else
-/*
- * GCC defines register number like this:
- * -----------------------------
- * 0 - 15 are integer registers
- * 17 - 22 are control/special registers
- * 24 - 39 fp registers
- * 40 - 47 xd registers
- * 48 - fpscr register
- * -----------------------------
- *
- * We follows above, except:
- * 16 --- program counter (PC)
- * 22 --- syscall #
- * 23 --- floating point communication register
*/
-#define REG_REG0 0
-#define REG_REG15 15
-
-#define REG_PC 16
-
-#define REG_PR 17
-#define REG_SR 18
-#define REG_GBR 19
-#define REG_MACH 20
-#define REG_MACL 21
-
-#define REG_SYSCALL 22
-
-#define REG_FPREG0 23
-#define REG_FPREG15 38
-#define REG_XFREG0 39
-#define REG_XFREG15 54
-
-#define REG_FPSCR 55
-#define REG_FPUL 56
-
-/*
- * This struct defines the way the registers are stored on the
- * kernel stack during a system call or other kernel entry.
- */
-struct pt_regs {
- unsigned long regs[16];
- unsigned long pc;
- unsigned long pr;
- unsigned long sr;
- unsigned long gbr;
- unsigned long mach;
- unsigned long macl;
- long tra;
-};
-
-/*
- * This struct defines the way the DSP registers are stored on the
- * kernel stack during a system call or other kernel entry.
- */
-struct pt_dspregs {
- unsigned long a1;
- unsigned long a0g;
- unsigned long a1g;
- unsigned long m0;
- unsigned long m1;
- unsigned long a0;
- unsigned long x0;
- unsigned long x1;
- unsigned long y0;
- unsigned long y1;
- unsigned long dsr;
- unsigned long rs;
- unsigned long re;
- unsigned long mod;
-};
-#endif
#define PTRACE_GETREGS 12 /* General registers */
#define PTRACE_SETREGS 13
#define PT_DATA_ADDR 248 /* &(struct user)->start_data */
#define PT_TEXT_LEN 252
+#if defined(__SH5__) || defined(CONFIG_CPU_SH5)
+#include "ptrace_64.h"
+#else
+#include "ptrace_32.h"
+#endif
+
#ifdef __KERNEL__
+
+#include <linux/stringify.h>
+#include <linux/stddef.h>
+#include <linux/thread_info.h>
#include <asm/addrspace.h>
#include <asm/page.h>
#include <asm/system.h>
#define user_mode(regs) (((regs)->sr & 0x40000000)==0)
+#define user_stack_pointer(regs) ((unsigned long)(regs)->regs[15])
+#define kernel_stack_pointer(regs) ((unsigned long)(regs)->regs[15])
#define instruction_pointer(regs) ((unsigned long)(regs)->pc)
extern void show_regs(struct pt_regs *);
+#define arch_has_single_step() (1)
+
/*
- * These are defined as per linux/ptrace.h.
+ * kprobe-based event tracer support
*/
-struct task_struct;
+struct pt_regs_offset {
+ const char *name;
+ int offset;
+};
-#define arch_has_single_step() (1)
+#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;
git.openpandora.org / pandora-kernel.git / blobdiff