[S390] ptrace cleanup
Overhaul program event recording and the code dealing with the ptrace
user space interface.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
index d9d42b1..9ad628a 100644
--- a/arch/s390/include/asm/ptrace.h
+++ b/arch/s390/include/asm/ptrace.h
@@ -331,10 +331,60 @@
unsigned short ilc;
unsigned short svcnr;
};
+
+/*
+ * Program event recording (PER) register set.
+ */
+struct per_regs {
+ unsigned long control; /* PER control bits */
+ unsigned long start; /* PER starting address */
+ unsigned long end; /* PER ending address */
+};
+
+/*
+ * PER event contains information about the cause of the last PER exception.
+ */
+struct per_event {
+ unsigned short cause; /* PER code, ATMID and AI */
+ unsigned long address; /* PER address */
+ unsigned char paid; /* PER access identification */
+};
+
+/*
+ * Simplified per_info structure used to decode the ptrace user space ABI.
+ */
+struct per_struct_kernel {
+ unsigned long cr9; /* PER control bits */
+ unsigned long cr10; /* PER starting address */
+ unsigned long cr11; /* PER ending address */
+ unsigned long bits; /* Obsolete software bits */
+ unsigned long starting_addr; /* User specified start address */
+ unsigned long ending_addr; /* User specified end address */
+ unsigned short perc_atmid; /* PER trap ATMID */
+ unsigned long address; /* PER trap instruction address */
+ unsigned char access_id; /* PER trap access identification */
+};
+
+#define PER_EVENT_MASK 0xE9000000UL
+
+#define PER_EVENT_BRANCH 0x80000000UL
+#define PER_EVENT_IFETCH 0x40000000UL
+#define PER_EVENT_STORE 0x20000000UL
+#define PER_EVENT_STORE_REAL 0x08000000UL
+#define PER_EVENT_NULLIFICATION 0x01000000UL
+
+#define PER_CONTROL_MASK 0x00a00000UL
+
+#define PER_CONTROL_BRANCH_ADDRESS 0x00800000UL
+#define PER_CONTROL_ALTERATION 0x00200000UL
+
#endif
/*
- * Now for the program event recording (trace) definitions.
+ * Now for the user space program event recording (trace) definitions.
+ * The following structures are used only for the ptrace interface, don't
+ * touch or even look at it if you don't want to modify the user-space
+ * ptrace interface. In particular stay away from it for in-kernel PER.
*/
typedef struct
{