/* * AArch64 KGDB support * * Based on arch/arm/include/kgdb.h * * Copyright (C) 2013 Cavium Inc. * Author: Vijaya Kumar K <vijaya.kumar@caviumnetworks.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef __ARM_KGDB_H #define __ARM_KGDB_H #include <linux/ptrace.h> #include <asm/debug-monitors.h> #ifndef __ASSEMBLY__ static inline void arch_kgdb_breakpoint(void) { asm ("brk %0" : : "I" (KGDB_COMPILED_DBG_BRK_IMM)); } extern void kgdb_handle_bus_error(void); extern int kgdb_fault_expected; #endif /* !__ASSEMBLY__ */ /* * gdb is expecting the following registers layout. * * General purpose regs: * r0-r30: 64 bit * sp,pc : 64 bit * pstate : 64 bit * Total: 34 * FPU regs: * f0-f31: 128 bit * Total: 32 * Extra regs * fpsr & fpcr: 32 bit * Total: 2 * */ #define _GP_REGS 34 #define _FP_REGS 32 #define _EXTRA_REGS 2 /* * general purpose registers size in bytes. * pstate is only 4 bytes. subtract 4 bytes */ #define GP_REG_BYTES (_GP_REGS * 8) #define DBG_MAX_REG_NUM (_GP_REGS + _FP_REGS + _EXTRA_REGS) /* * Size of I/O buffer for gdb packet. * considering to hold all register contents, size is set */ #define BUFMAX 2048 /* * Number of bytes required for gdb_regs buffer. * _GP_REGS: 8 bytes, _FP_REGS: 16 bytes and _EXTRA_REGS: 4 bytes each * GDB fails to connect for size beyond this with error * "'g' packet reply is too long" */ #define NUMREGBYTES ((_GP_REGS * 8) + (_FP_REGS * 16) + \ (_EXTRA_REGS * 4)) #endif /* __ASM_KGDB_H */