diff options
Diffstat (limited to 'arch/arm64/include/asm/debug-monitors.h')
| -rw-r--r-- | arch/arm64/include/asm/debug-monitors.h | 30 |
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 |