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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a0de055cf6
One of the driving forces behind integrating another front end (kdb) to the debug core is to allow front end commands to be accessible via gdb's monitor command. It is true that you could write gdb macros to get certain data, but you may want to just use gdb to access the commands that are available in the kdb front end. This patch implements the Rcmd gdb stub packet. In gdb you access this with the "monitor" command. For instance you could type "monitor help", "monitor lsmod" or "monitor ps A" etc... There is no error checking or command restrictions on what you can and cannot access at this point. Doing something like trying to set breakpoints with the monitor command is going to cause nothing but problems. Perhaps in the future only the commands that are actually known to work with the gdb monitor command will be available. Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
/*
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* Created by: Jason Wessel <jason.wessel@windriver.com>
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*
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* Copyright (c) 2009 Wind River Systems, Inc. All Rights Reserved.
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#ifndef _DEBUG_CORE_H_
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#define _DEBUG_CORE_H_
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/*
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* These are the private implementation headers between the kernel
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* debugger core and the debugger front end code.
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*/
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/* kernel debug core data structures */
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struct kgdb_state {
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int ex_vector;
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int signo;
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int err_code;
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int cpu;
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int pass_exception;
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unsigned long thr_query;
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unsigned long threadid;
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long kgdb_usethreadid;
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struct pt_regs *linux_regs;
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};
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/* Exception state values */
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#define DCPU_WANT_MASTER 0x1 /* Waiting to become a master kgdb cpu */
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#define DCPU_NEXT_MASTER 0x2 /* Transition from one master cpu to another */
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#define DCPU_IS_SLAVE 0x4 /* Slave cpu enter exception */
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#define DCPU_SSTEP 0x8 /* CPU is single stepping */
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struct debuggerinfo_struct {
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void *debuggerinfo;
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struct task_struct *task;
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int exception_state;
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int ret_state;
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int irq_depth;
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};
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extern struct debuggerinfo_struct kgdb_info[];
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/* kernel debug core break point routines */
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extern int dbg_remove_all_break(void);
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extern int dbg_set_sw_break(unsigned long addr);
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extern int dbg_remove_sw_break(unsigned long addr);
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extern int dbg_activate_sw_breakpoints(void);
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extern int dbg_deactivate_sw_breakpoints(void);
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/* polled character access to i/o module */
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extern int dbg_io_get_char(void);
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/* stub return value for switching between the gdbstub and kdb */
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#define DBG_PASS_EVENT -12345
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/* Switch from one cpu to another */
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#define DBG_SWITCH_CPU_EVENT -123456
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extern int dbg_switch_cpu;
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/* gdbstub interface functions */
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extern int gdb_serial_stub(struct kgdb_state *ks);
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extern void gdbstub_msg_write(const char *s, int len);
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/* gdbstub functions used for kdb <-> gdbstub transition */
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extern int gdbstub_state(struct kgdb_state *ks, char *cmd);
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extern int dbg_kdb_mode;
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#ifdef CONFIG_KGDB_KDB
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extern int kdb_stub(struct kgdb_state *ks);
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extern int kdb_parse(const char *cmdstr);
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#else /* ! CONFIG_KGDB_KDB */
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static inline int kdb_stub(struct kgdb_state *ks)
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{
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return DBG_PASS_EVENT;
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}
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#endif /* CONFIG_KGDB_KDB */
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#endif /* _DEBUG_CORE_H_ */
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