import PULS_20160108

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm64 / include / asm / debug-monitors.h

diff --git a/arch/arm64/include/asm/debug-monitors.h b/arch/arm64/include/asm/debug-monitors.h
index 7eaa0b302493491b781b0a8c432b66bdac57fd43..f779fa429607c064653b241927efda6077d3a105 100644 (file)
--- a/arch/arm64/include/asm/debug-monitors.h
+++ b/arch/arm64/include/asm/debug-monitors.h
@@ -26,6 +26,54 @@
 #define DBG_ESR_EVT_HWWP       0x2
 #define DBG_ESR_EVT_BRK                0x6
 
+/*
+ * Break point instruction encoding
+ */
+#define BREAK_INSTR_SIZE               4
+
+/*
+ * ESR values expected for dynamic and compile time BRK instruction
+ */
+#define DBG_ESR_VAL_BRK(x)     (0xf2000000 | ((x) & 0xfffff))
+
+/*
+ * #imm16 values used for BRK instruction generation
+ * Allowed values for kgbd are 0x400 - 0x7ff
+ * 0x400: for dynamic BRK instruction
+ * 0x401: for compile time BRK instruction
+ */
+#define KGDB_DYN_DBG_BRK_IMM           0x400
+#define KGDB_COMPILED_DBG_BRK_IMM      0x401
+
+
+/*
+ * BRK instruction encoding
+ * The #imm16 value should be placed at bits[20:5] within BRK ins
+ */
+#define AARCH64_BREAK_MON      0xd4200000
+
+/*
+ * Extract byte from BRK instruction
+ */
+#define KGDB_DYN_DBG_BRK_INS_BYTE(x) \
+       ((((AARCH64_BREAK_MON) & 0xffe0001f) >> (x * 8)) & 0xff)
+
+/*
+ * Extract byte from BRK #imm16
+ */
+#define KGBD_DYN_DBG_BRK_IMM_BYTE(x) \
+       (((((KGDB_DYN_DBG_BRK_IMM) & 0xffff) << 5) >> (x * 8)) & 0xff)
+
+#define KGDB_DYN_DBG_BRK_BYTE(x) \
+       (KGDB_DYN_DBG_BRK_INS_BYTE(x) | KGBD_DYN_DBG_BRK_IMM_BYTE(x))
+
+#define  KGDB_DYN_BRK_INS_BYTE0  KGDB_DYN_DBG_BRK_BYTE(0)
+#define  KGDB_DYN_BRK_INS_BYTE1  KGDB_DYN_DBG_BRK_BYTE(1)
+#define  KGDB_DYN_BRK_INS_BYTE2  KGDB_DYN_DBG_BRK_BYTE(2)
+#define  KGDB_DYN_BRK_INS_BYTE3  KGDB_DYN_DBG_BRK_BYTE(3)
+
+#define CACHE_FLUSH_IS_SAFE            1
+
 enum debug_el {
        DBG_ACTIVE_EL0 = 0,
        DBG_ACTIVE_EL1,
@@ -43,25 +91,29 @@ enum debug_el {
 #ifndef __ASSEMBLY__
 struct task_struct;
 
-#define local_dbg_save(flags)                                                  \
-       do {                                                                    \
-               typecheck(unsigned long, flags);                                \
-               asm volatile(                                                   \
-               "mrs    %0, daif                        // local_dbg_save\n"    \
-               "msr    daifset, #8"                                            \
-               : "=r" (flags) : : "memory");                                   \
-       } while (0)
-
-#define local_dbg_restore(flags)                                               \
-       do {                                                                    \
-               typecheck(unsigned long, flags);                                \
-               asm volatile(                                                   \
-               "msr    daif, %0                        // local_dbg_restore\n" \
-               : : "r" (flags) : "memory");                                    \
-       } while (0)
-
 #define DBG_ARCH_ID_RESERVED   0       /* In case of ptrace ABI updates. */
 
+#define DBG_HOOK_HANDLED       0
+#define DBG_HOOK_ERROR         1
+
+struct step_hook {
+       struct list_head node;
+       int (*fn)(struct pt_regs *regs, unsigned int esr);
+};
+
+void register_step_hook(struct step_hook *hook);
+void unregister_step_hook(struct step_hook *hook);
+
+struct break_hook {
+       struct list_head node;
+       u32 esr_val;
+       u32 esr_mask;
+       int (*fn)(struct pt_regs *regs, unsigned int esr);
+};
+
+void register_break_hook(struct break_hook *hook);
+void unregister_break_hook(struct break_hook *hook);
+
 u8 debug_monitors_arch(void);
 
 void enable_debug_monitors(enum debug_el el);
@@ -83,6 +135,15 @@ static inline int reinstall_suspended_bps(struct pt_regs *regs)
 }
 #endif
 
+#ifdef CONFIG_COMPAT
+int aarch32_break_handler(struct pt_regs *regs);
+#else
+static int aarch32_break_handler(struct pt_regs *regs)
+{
+       return -EFAULT;
+}
+#endif
+
 #endif /* __ASSEMBLY */
 #endif /* __KERNEL__ */
 #endif /* __ASM_DEBUG_MONITORS_H */