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