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Diffstat (limited to 'arch/arm64/include/asm/debug-monitors.h')
-rw-r--r--arch/arm64/include/asm/debug-monitors.h30
1 files changed, 19 insertions, 11 deletions
diff --git a/arch/arm64/include/asm/debug-monitors.h b/arch/arm64/include/asm/debug-monitors.h
index 7fb343779498..40ec68aa6870 100644
--- a/arch/arm64/include/asm/debug-monitors.h
+++ b/arch/arm64/include/asm/debug-monitors.h
@@ -48,11 +48,13 @@
/*
* #imm16 values used for BRK instruction generation
* Allowed values for kgbd are 0x400 - 0x7ff
+ * 0x100: for triggering a fault on purpose (reserved)
* 0x400: for dynamic BRK instruction
* 0x401: for compile time BRK instruction
*/
-#define KGDB_DYN_DGB_BRK_IMM 0x400
-#define KDBG_COMPILED_DBG_BRK_IMM 0x401
+#define FAULT_BRK_IMM 0x100
+#define KGDB_DYN_DBG_BRK_IMM 0x400
+#define KGDB_COMPILED_DBG_BRK_IMM 0x401
/*
* BRK instruction encoding
@@ -61,24 +63,30 @@
#define AARCH64_BREAK_MON 0xd4200000
/*
+ * BRK instruction for provoking a fault on purpose
+ * Unlike kgdb, #imm16 value with unallocated handler is used for faulting.
+ */
+#define AARCH64_BREAK_FAULT (AARCH64_BREAK_MON | (FAULT_BRK_IMM << 5))
+
+/*
* Extract byte from BRK instruction
*/
-#define KGDB_DYN_DGB_BRK_INS_BYTE(x) \
+#define KGDB_DYN_DBG_BRK_INS_BYTE(x) \
((((AARCH64_BREAK_MON) & 0xffe0001f) >> (x * 8)) & 0xff)
/*
* Extract byte from BRK #imm16
*/
-#define KGBD_DYN_DGB_BRK_IMM_BYTE(x) \
- (((((KGDB_DYN_DGB_BRK_IMM) & 0xffff) << 5) >> (x * 8)) & 0xff)
+#define KGBD_DYN_DBG_BRK_IMM_BYTE(x) \
+ (((((KGDB_DYN_DBG_BRK_IMM) & 0xffff) << 5) >> (x * 8)) & 0xff)
-#define KGDB_DYN_DGB_BRK_BYTE(x) \
- (KGDB_DYN_DGB_BRK_INS_BYTE(x) | KGBD_DYN_DGB_BRK_IMM_BYTE(x))
+#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_DGB_BRK_BYTE(0)
-#define KGDB_DYN_BRK_INS_BYTE1 KGDB_DYN_DGB_BRK_BYTE(1)
-#define KGDB_DYN_BRK_INS_BYTE2 KGDB_DYN_DGB_BRK_BYTE(2)
-#define KGDB_DYN_BRK_INS_BYTE3 KGDB_DYN_DGB_BRK_BYTE(3)
+#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