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kdb: Simplify kdb commands registration 

Simplify kdb commands registration via using linked list instead of
static array for commands storage.

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Link: https://lore.kernel.org/r/20210224070827.408771-1-sumit.garg@linaro.org
Reviewed-by: Douglas Anderson <dianders@chromium.org>
[daniel.thompson@linaro.org: Removed a bunch of .cmd_minline = 0
initializers]
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
This commit is contained in:
Sumit Garg 2021-02-24 12:38:27 +05:30 committed by Daniel Thompson
parent d027fdc4fa
commit e4f291b3f7
3 changed files with 314 additions and 216 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

75
kernel/debug/kdb/kdb_bp.c
View File

@ -522,6 +522,54 @@ static int kdb_ss(int argc, const char **argv)
return KDB_CMD_SS;
}
static kdbtab_t bptab[] = {
{ .cmd_name = "bp",
.cmd_func = kdb_bp,
.cmd_usage = "[<vaddr>]",
.cmd_help = "Set/Display breakpoints",
.cmd_flags = KDB_ENABLE_FLOW_CTRL | KDB_REPEAT_NO_ARGS,
},
{ .cmd_name = "bl",
.cmd_func = kdb_bp,
.cmd_usage = "[<vaddr>]",
.cmd_help = "Display breakpoints",
.cmd_flags = KDB_ENABLE_FLOW_CTRL | KDB_REPEAT_NO_ARGS,
},
{ .cmd_name = "bc",
.cmd_func = kdb_bc,
.cmd_usage = "<bpnum>",
.cmd_help = "Clear Breakpoint",
.cmd_flags = KDB_ENABLE_FLOW_CTRL,
},
{ .cmd_name = "be",
.cmd_func = kdb_bc,
.cmd_usage = "<bpnum>",
.cmd_help = "Enable Breakpoint",
.cmd_flags = KDB_ENABLE_FLOW_CTRL,
},
{ .cmd_name = "bd",
.cmd_func = kdb_bc,
.cmd_usage = "<bpnum>",
.cmd_help = "Disable Breakpoint",
.cmd_flags = KDB_ENABLE_FLOW_CTRL,
},
{ .cmd_name = "ss",
.cmd_func = kdb_ss,
.cmd_usage = "",
.cmd_help = "Single Step",
.cmd_minlen = 1,
.cmd_flags = KDB_ENABLE_FLOW_CTRL | KDB_REPEAT_NO_ARGS,
},
};
static kdbtab_t bphcmd = {
.cmd_name = "bph",
.cmd_func = kdb_bp,
.cmd_usage = "[<vaddr>]",
.cmd_help = "[datar [length]|dataw [length]] Set hw brk",
.cmd_flags = KDB_ENABLE_FLOW_CTRL | KDB_REPEAT_NO_ARGS,
};
/* Initialize the breakpoint table and register breakpoint commands. */
void __init kdb_initbptab(void)
@ -537,30 +585,7 @@ void __init kdb_initbptab(void)
for (i = 0, bp = kdb_breakpoints; i < KDB_MAXBPT; i++, bp++)
bp->bp_free = 1;
kdb_register_flags("bp", kdb_bp, "[<vaddr>]",
"Set/Display breakpoints", 0,
KDB_ENABLE_FLOW_CTRL | KDB_REPEAT_NO_ARGS);
kdb_register_flags("bl", kdb_bp, "[<vaddr>]",
"Display breakpoints", 0,
KDB_ENABLE_FLOW_CTRL | KDB_REPEAT_NO_ARGS);
kdb_register_table(bptab, ARRAY_SIZE(bptab));
if (arch_kgdb_ops.flags & KGDB_HW_BREAKPOINT)
kdb_register_flags("bph", kdb_bp, "[<vaddr>]",
"[datar [length]|dataw [length]] Set hw brk", 0,
KDB_ENABLE_FLOW_CTRL | KDB_REPEAT_NO_ARGS);
kdb_register_flags("bc", kdb_bc, "<bpnum>",
"Clear Breakpoint", 0,
KDB_ENABLE_FLOW_CTRL);
kdb_register_flags("be", kdb_bc, "<bpnum>",
"Enable Breakpoint", 0,
KDB_ENABLE_FLOW_CTRL);
kdb_register_flags("bd", kdb_bc, "<bpnum>",
"Disable Breakpoint", 0,
KDB_ENABLE_FLOW_CTRL);
kdb_register_flags("ss", kdb_ss, "",
"Single Step", 1,
KDB_ENABLE_FLOW_CTRL | KDB_REPEAT_NO_ARGS);
/*
* Architecture dependent initialization.
*/
kdb_register_table(&bphcmd, 1);
}

452
kernel/debug/kdb/kdb_main.c
View File

@ -33,6 +33,7 @@
#include <linux/kallsyms.h>
#include <linux/kgdb.h>
#include <linux/kdb.h>
#include <linux/list.h>
#include <linux/notifier.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
@ -84,15 +85,8 @@ static unsigned int kdb_continue_catastrophic =
static unsigned int kdb_continue_catastrophic;
#endif
/* kdb_commands describes the available commands. */
static kdbtab_t *kdb_commands;
#define KDB_BASE_CMD_MAX 50
static int kdb_max_commands = KDB_BASE_CMD_MAX;
static kdbtab_t kdb_base_commands[KDB_BASE_CMD_MAX];
#define for_each_kdbcmd(cmd, num) \
for ((cmd) = kdb_base_commands, (num) = 0; \
num < kdb_max_commands; \
num++, num == KDB_BASE_CMD_MAX ? cmd = kdb_commands : cmd++)
/* kdb_cmds_head describes the available commands. */
static LIST_HEAD(kdb_cmds_head);
typedef struct _kdbmsg {
int km_diag; /* kdb diagnostic */
@ -921,7 +915,7 @@ int kdb_parse(const char *cmdstr)
char *cp;
char *cpp, quoted;
kdbtab_t *tp;
int i, escaped, ignore_errors = 0, check_grep = 0;
int escaped, ignore_errors = 0, check_grep = 0;
/*
* First tokenize the command string.
@ -1011,25 +1005,17 @@ int kdb_parse(const char *cmdstr)
++argv[0];
}
for_each_kdbcmd(tp, i) {
if (tp->cmd_name) {
/*
* If this command is allowed to be abbreviated,
* check to see if this is it.
*/
list_for_each_entry(tp, &kdb_cmds_head, list_node) {
/*
* If this command is allowed to be abbreviated,
* check to see if this is it.
*/
if (tp->cmd_minlen && (strlen(argv[0]) <= tp->cmd_minlen) &&
(strncmp(argv[0], tp->cmd_name, tp->cmd_minlen) == 0))
break;
if (tp->cmd_minlen
&& (strlen(argv[0]) <= tp->cmd_minlen)) {
if (strncmp(argv[0],
tp->cmd_name,
tp->cmd_minlen) == 0) {
break;
}
}
if (strcmp(argv[0], tp->cmd_name) == 0)
break;
}
if (strcmp(argv[0], tp->cmd_name) == 0)
break;
}
/*
@ -1037,19 +1023,15 @@ int kdb_parse(const char *cmdstr)
* few characters of this match any of the known commands.
* e.g., md1c20 should match md.
*/
if (i == kdb_max_commands) {
for_each_kdbcmd(tp, i) {
if (tp->cmd_name) {
if (strncmp(argv[0],
tp->cmd_name,
strlen(tp->cmd_name)) == 0) {
break;
}
}
if (list_entry_is_head(tp, &kdb_cmds_head, list_node)) {
list_for_each_entry(tp, &kdb_cmds_head, list_node) {
if (strncmp(argv[0], tp->cmd_name,
strlen(tp->cmd_name)) == 0)
break;
}
}
if (i < kdb_max_commands) {
if (!list_entry_is_head(tp, &kdb_cmds_head, list_node)) {
int result;
if (!kdb_check_flags(tp->cmd_flags, kdb_cmd_enabled, argc <= 1))
@ -2428,17 +2410,14 @@ static int kdb_kgdb(int argc, const char **argv)
static int kdb_help(int argc, const char **argv)
{
kdbtab_t *kt;
int i;
kdb_printf("%-15.15s %-20.20s %s\n", "Command", "Usage", "Description");
kdb_printf("-----------------------------"
"-----------------------------\n");
for_each_kdbcmd(kt, i) {
list_for_each_entry(kt, &kdb_cmds_head, list_node) {
char *space = "";
if (KDB_FLAG(CMD_INTERRUPT))
return 0;
if (!kt->cmd_name)
continue;
if (!kdb_check_flags(kt->cmd_flags, kdb_cmd_enabled, true))
continue;
if (strlen(kt->cmd_usage) > 20)
@ -2659,7 +2638,6 @@ static int kdb_grep_help(int argc, const char **argv)
* Returns:
* zero for success, one if a duplicate command.
*/
#define kdb_command_extend 50 /* arbitrary */
int kdb_register_flags(char *cmd,
kdb_func_t func,
char *usage,
@ -2667,49 +2645,20 @@ int kdb_register_flags(char *cmd,
short minlen,
kdb_cmdflags_t flags)
{
int i;
kdbtab_t *kp;
/*
* Brute force method to determine duplicates
*/
for_each_kdbcmd(kp, i) {
if (kp->cmd_name && (strcmp(kp->cmd_name, cmd) == 0)) {
list_for_each_entry(kp, &kdb_cmds_head, list_node) {
if (strcmp(kp->cmd_name, cmd) == 0) {
kdb_printf("Duplicate kdb command registered: "
"%s, func %px help %s\n", cmd, func, help);
return 1;
}
}
/*
* Insert command into first available location in table
*/
for_each_kdbcmd(kp, i) {
if (kp->cmd_name == NULL)
break;
}
if (i >= kdb_max_commands) {
kdbtab_t *new = kmalloc_array(kdb_max_commands -
KDB_BASE_CMD_MAX +
kdb_command_extend,
sizeof(*new),
GFP_KDB);
if (!new) {
kdb_printf("Could not allocate new kdb_command "
"table\n");
return 1;
}
if (kdb_commands) {
memcpy(new, kdb_commands,
(kdb_max_commands - KDB_BASE_CMD_MAX) * sizeof(*new));
kfree(kdb_commands);
}
memset(new + kdb_max_commands - KDB_BASE_CMD_MAX, 0,
kdb_command_extend * sizeof(*new));
kdb_commands = new;
kp = kdb_commands + kdb_max_commands - KDB_BASE_CMD_MAX;
kdb_max_commands += kdb_command_extend;
kp = kmalloc(sizeof(*kp), GFP_KDB);
if (!kp) {
kdb_printf("Could not allocate new kdb_command table\n");
return 1;
}
kp->cmd_name = cmd;
@ -2718,11 +2667,27 @@ int kdb_register_flags(char *cmd,
kp->cmd_help = help;
kp->cmd_minlen = minlen;
kp->cmd_flags = flags;
kp->is_dynamic = true;
list_add_tail(&kp->list_node, &kdb_cmds_head);
return 0;
}
EXPORT_SYMBOL_GPL(kdb_register_flags);
/*
* kdb_register_table() - This function is used to register a kdb command
* table.
* @kp: pointer to kdb command table
* @len: length of kdb command table
*/
void kdb_register_table(kdbtab_t *kp, size_t len)
{
while (len--) {
list_add_tail(&kp->list_node, &kdb_cmds_head);
kp++;
}
}
/*
* kdb_register - Compatibility register function for commands that do
@ -2757,15 +2722,16 @@ EXPORT_SYMBOL_GPL(kdb_register);
*/
int kdb_unregister(char *cmd)
{
int i;
kdbtab_t *kp;
/*
* find the command.
*/
for_each_kdbcmd(kp, i) {
if (kp->cmd_name && (strcmp(kp->cmd_name, cmd) == 0)) {
kp->cmd_name = NULL;
list_for_each_entry(kp, &kdb_cmds_head, list_node) {
if (strcmp(kp->cmd_name, cmd) == 0) {
list_del(&kp->list_node);
if (kp->is_dynamic)
kfree(kp);
return 0;
}
}
@ -2775,118 +2741,222 @@ int kdb_unregister(char *cmd)
}
EXPORT_SYMBOL_GPL(kdb_unregister);
static kdbtab_t maintab[] = {
{ .cmd_name = "md",
.cmd_func = kdb_md,
.cmd_usage = "<vaddr>",
.cmd_help = "Display Memory Contents, also mdWcN, e.g. md8c1",
.cmd_minlen = 1,
.cmd_flags = KDB_ENABLE_MEM_READ | KDB_REPEAT_NO_ARGS,
},
{ .cmd_name = "mdr",
.cmd_func = kdb_md,
.cmd_usage = "<vaddr> <bytes>",
.cmd_help = "Display Raw Memory",
.cmd_flags = KDB_ENABLE_MEM_READ | KDB_REPEAT_NO_ARGS,
},
{ .cmd_name = "mdp",
.cmd_func = kdb_md,
.cmd_usage = "<paddr> <bytes>",
.cmd_help = "Display Physical Memory",
.cmd_flags = KDB_ENABLE_MEM_READ | KDB_REPEAT_NO_ARGS,
},
{ .cmd_name = "mds",
.cmd_func = kdb_md,
.cmd_usage = "<vaddr>",
.cmd_help = "Display Memory Symbolically",
.cmd_flags = KDB_ENABLE_MEM_READ | KDB_REPEAT_NO_ARGS,
},
{ .cmd_name = "mm",
.cmd_func = kdb_mm,
.cmd_usage = "<vaddr> <contents>",
.cmd_help = "Modify Memory Contents",
.cmd_flags = KDB_ENABLE_MEM_WRITE | KDB_REPEAT_NO_ARGS,
},
{ .cmd_name = "go",
.cmd_func = kdb_go,
.cmd_usage = "[<vaddr>]",
.cmd_help = "Continue Execution",
.cmd_minlen = 1,
.cmd_flags = KDB_ENABLE_REG_WRITE |
KDB_ENABLE_ALWAYS_SAFE_NO_ARGS,
},
{ .cmd_name = "rd",
.cmd_func = kdb_rd,
.cmd_usage = "",
.cmd_help = "Display Registers",
.cmd_flags = KDB_ENABLE_REG_READ,
},
{ .cmd_name = "rm",
.cmd_func = kdb_rm,
.cmd_usage = "<reg> <contents>",
.cmd_help = "Modify Registers",
.cmd_flags = KDB_ENABLE_REG_WRITE,
},
{ .cmd_name = "ef",
.cmd_func = kdb_ef,
.cmd_usage = "<vaddr>",
.cmd_help = "Display exception frame",
.cmd_flags = KDB_ENABLE_MEM_READ,
},
{ .cmd_name = "bt",
.cmd_func = kdb_bt,
.cmd_usage = "[<vaddr>]",
.cmd_help = "Stack traceback",
.cmd_minlen = 1,
.cmd_flags = KDB_ENABLE_MEM_READ | KDB_ENABLE_INSPECT_NO_ARGS,
},
{ .cmd_name = "btp",
.cmd_func = kdb_bt,
.cmd_usage = "<pid>",
.cmd_help = "Display stack for process <pid>",
.cmd_flags = KDB_ENABLE_INSPECT,
},
{ .cmd_name = "bta",
.cmd_func = kdb_bt,
.cmd_usage = "[D|R|S|T|C|Z|E|U|I|M|A]",
.cmd_help = "Backtrace all processes matching state flag",
.cmd_flags = KDB_ENABLE_INSPECT,
},
{ .cmd_name = "btc",
.cmd_func = kdb_bt,
.cmd_usage = "",
.cmd_help = "Backtrace current process on each cpu",
.cmd_flags = KDB_ENABLE_INSPECT,
},
{ .cmd_name = "btt",
.cmd_func = kdb_bt,
.cmd_usage = "<vaddr>",
.cmd_help = "Backtrace process given its struct task address",
.cmd_flags = KDB_ENABLE_MEM_READ | KDB_ENABLE_INSPECT_NO_ARGS,
},
{ .cmd_name = "env",
.cmd_func = kdb_env,
.cmd_usage = "",
.cmd_help = "Show environment variables",
.cmd_flags = KDB_ENABLE_ALWAYS_SAFE,
},
{ .cmd_name = "set",
.cmd_func = kdb_set,
.cmd_usage = "",
.cmd_help = "Set environment variables",
.cmd_flags = KDB_ENABLE_ALWAYS_SAFE,
},
{ .cmd_name = "help",
.cmd_func = kdb_help,
.cmd_usage = "",
.cmd_help = "Display Help Message",
.cmd_minlen = 1,
.cmd_flags = KDB_ENABLE_ALWAYS_SAFE,
},
{ .cmd_name = "?",
.cmd_func = kdb_help,
.cmd_usage = "",
.cmd_help = "Display Help Message",
.cmd_flags = KDB_ENABLE_ALWAYS_SAFE,
},
{ .cmd_name = "cpu",
.cmd_func = kdb_cpu,
.cmd_usage = "<cpunum>",
.cmd_help = "Switch to new cpu",
.cmd_flags = KDB_ENABLE_ALWAYS_SAFE_NO_ARGS,
},
{ .cmd_name = "kgdb",
.cmd_func = kdb_kgdb,
.cmd_usage = "",
.cmd_help = "Enter kgdb mode",
.cmd_flags = 0,
},
{ .cmd_name = "ps",
.cmd_func = kdb_ps,
.cmd_usage = "[<flags>|A]",
.cmd_help = "Display active task list",
.cmd_flags = KDB_ENABLE_INSPECT,
},
{ .cmd_name = "pid",
.cmd_func = kdb_pid,
.cmd_usage = "<pidnum>",
.cmd_help = "Switch to another task",
.cmd_flags = KDB_ENABLE_INSPECT,
},
{ .cmd_name = "reboot",
.cmd_func = kdb_reboot,
.cmd_usage = "",
.cmd_help = "Reboot the machine immediately",
.cmd_flags = KDB_ENABLE_REBOOT,
},
#if defined(CONFIG_MODULES)
{ .cmd_name = "lsmod",
.cmd_func = kdb_lsmod,
.cmd_usage = "",
.cmd_help = "List loaded kernel modules",
.cmd_flags = KDB_ENABLE_INSPECT,
},
#endif
#if defined(CONFIG_MAGIC_SYSRQ)
{ .cmd_name = "sr",
.cmd_func = kdb_sr,
.cmd_usage = "<key>",
.cmd_help = "Magic SysRq key",
.cmd_flags = KDB_ENABLE_ALWAYS_SAFE,
},
#endif
#if defined(CONFIG_PRINTK)
{ .cmd_name = "dmesg",
.cmd_func = kdb_dmesg,
.cmd_usage = "[lines]",
.cmd_help = "Display syslog buffer",
.cmd_flags = KDB_ENABLE_ALWAYS_SAFE,
},
#endif
{ .cmd_name = "defcmd",
.cmd_func = kdb_defcmd,
.cmd_usage = "name \"usage\" \"help\"",
.cmd_help = "Define a set of commands, down to endefcmd",
.cmd_flags = KDB_ENABLE_ALWAYS_SAFE,
},
{ .cmd_name = "kill",
.cmd_func = kdb_kill,
.cmd_usage = "<-signal> <pid>",
.cmd_help = "Send a signal to a process",
.cmd_flags = KDB_ENABLE_SIGNAL,
},
{ .cmd_name = "summary",
.cmd_func = kdb_summary,
.cmd_usage = "",
.cmd_help = "Summarize the system",
.cmd_minlen = 4,
.cmd_flags = KDB_ENABLE_ALWAYS_SAFE,
},
{ .cmd_name = "per_cpu",
.cmd_func = kdb_per_cpu,
.cmd_usage = "<sym> [<bytes>] [<cpu>]",
.cmd_help = "Display per_cpu variables",
.cmd_minlen = 3,
.cmd_flags = KDB_ENABLE_MEM_READ,
},
{ .cmd_name = "grephelp",
.cmd_func = kdb_grep_help,
.cmd_usage = "",
.cmd_help = "Display help on | grep",
.cmd_flags = KDB_ENABLE_ALWAYS_SAFE,
},
};
static kdbtab_t nmicmd = {
.cmd_name = "disable_nmi",
.cmd_func = kdb_disable_nmi,
.cmd_usage = "",
.cmd_help = "Disable NMI entry to KDB",
.cmd_flags = KDB_ENABLE_ALWAYS_SAFE,
};
/* Initialize the kdb command table. */
static void __init kdb_inittab(void)
{
int i;
kdbtab_t *kp;
for_each_kdbcmd(kp, i)
kp->cmd_name = NULL;
kdb_register_flags("md", kdb_md, "<vaddr>",
"Display Memory Contents, also mdWcN, e.g. md8c1", 1,
KDB_ENABLE_MEM_READ | KDB_REPEAT_NO_ARGS);
kdb_register_flags("mdr", kdb_md, "<vaddr> <bytes>",
"Display Raw Memory", 0,
KDB_ENABLE_MEM_READ | KDB_REPEAT_NO_ARGS);
kdb_register_flags("mdp", kdb_md, "<paddr> <bytes>",
"Display Physical Memory", 0,
KDB_ENABLE_MEM_READ | KDB_REPEAT_NO_ARGS);
kdb_register_flags("mds", kdb_md, "<vaddr>",
"Display Memory Symbolically", 0,
KDB_ENABLE_MEM_READ | KDB_REPEAT_NO_ARGS);
kdb_register_flags("mm", kdb_mm, "<vaddr> <contents>",
"Modify Memory Contents", 0,
KDB_ENABLE_MEM_WRITE | KDB_REPEAT_NO_ARGS);
kdb_register_flags("go", kdb_go, "[<vaddr>]",
"Continue Execution", 1,
KDB_ENABLE_REG_WRITE | KDB_ENABLE_ALWAYS_SAFE_NO_ARGS);
kdb_register_flags("rd", kdb_rd, "",
"Display Registers", 0,
KDB_ENABLE_REG_READ);
kdb_register_flags("rm", kdb_rm, "<reg> <contents>",
"Modify Registers", 0,
KDB_ENABLE_REG_WRITE);
kdb_register_flags("ef", kdb_ef, "<vaddr>",
"Display exception frame", 0,
KDB_ENABLE_MEM_READ);
kdb_register_flags("bt", kdb_bt, "[<vaddr>]",
"Stack traceback", 1,
KDB_ENABLE_MEM_READ | KDB_ENABLE_INSPECT_NO_ARGS);
kdb_register_flags("btp", kdb_bt, "<pid>",
"Display stack for process <pid>", 0,
KDB_ENABLE_INSPECT);
kdb_register_flags("bta", kdb_bt, "[D|R|S|T|C|Z|E|U|I|M|A]",
"Backtrace all processes matching state flag", 0,
KDB_ENABLE_INSPECT);
kdb_register_flags("btc", kdb_bt, "",
"Backtrace current process on each cpu", 0,
KDB_ENABLE_INSPECT);
kdb_register_flags("btt", kdb_bt, "<vaddr>",
"Backtrace process given its struct task address", 0,
KDB_ENABLE_MEM_READ | KDB_ENABLE_INSPECT_NO_ARGS);
kdb_register_flags("env", kdb_env, "",
"Show environment variables", 0,
KDB_ENABLE_ALWAYS_SAFE);
kdb_register_flags("set", kdb_set, "",
"Set environment variables", 0,
KDB_ENABLE_ALWAYS_SAFE);
kdb_register_flags("help", kdb_help, "",
"Display Help Message", 1,
KDB_ENABLE_ALWAYS_SAFE);
kdb_register_flags("?", kdb_help, "",
"Display Help Message", 0,
KDB_ENABLE_ALWAYS_SAFE);
kdb_register_flags("cpu", kdb_cpu, "<cpunum>",
"Switch to new cpu", 0,
KDB_ENABLE_ALWAYS_SAFE_NO_ARGS);
kdb_register_flags("kgdb", kdb_kgdb, "",
"Enter kgdb mode", 0, 0);
kdb_register_flags("ps", kdb_ps, "[<flags>|A]",
"Display active task list", 0,
KDB_ENABLE_INSPECT);
kdb_register_flags("pid", kdb_pid, "<pidnum>",
"Switch to another task", 0,
KDB_ENABLE_INSPECT);
kdb_register_flags("reboot", kdb_reboot, "",
"Reboot the machine immediately", 0,
KDB_ENABLE_REBOOT);
#if defined(CONFIG_MODULES)
kdb_register_flags("lsmod", kdb_lsmod, "",
"List loaded kernel modules", 0,
KDB_ENABLE_INSPECT);
#endif
#if defined(CONFIG_MAGIC_SYSRQ)
kdb_register_flags("sr", kdb_sr, "<key>",
"Magic SysRq key", 0,
KDB_ENABLE_ALWAYS_SAFE);
#endif
#if defined(CONFIG_PRINTK)
kdb_register_flags("dmesg", kdb_dmesg, "[lines]",
"Display syslog buffer", 0,
KDB_ENABLE_ALWAYS_SAFE);
#endif
if (arch_kgdb_ops.enable_nmi) {
kdb_register_flags("disable_nmi", kdb_disable_nmi, "",
"Disable NMI entry to KDB", 0,
KDB_ENABLE_ALWAYS_SAFE);
}
kdb_register_flags("defcmd", kdb_defcmd, "name \"usage\" \"help\"",
"Define a set of commands, down to endefcmd", 0,
KDB_ENABLE_ALWAYS_SAFE);
kdb_register_flags("kill", kdb_kill, "<-signal> <pid>",
"Send a signal to a process", 0,
KDB_ENABLE_SIGNAL);
kdb_register_flags("summary", kdb_summary, "",
"Summarize the system", 4,
KDB_ENABLE_ALWAYS_SAFE);
kdb_register_flags("per_cpu", kdb_per_cpu, "<sym> [<bytes>] [<cpu>]",
"Display per_cpu variables", 3,
KDB_ENABLE_MEM_READ);
kdb_register_flags("grephelp", kdb_grep_help, "",
"Display help on | grep", 0,
KDB_ENABLE_ALWAYS_SAFE);
kdb_register_table(maintab, ARRAY_SIZE(maintab));
if (arch_kgdb_ops.enable_nmi)
kdb_register_table(&nmicmd, 1);
}
/* Execute any commands defined in kdb_cmds. */

3
kernel/debug/kdb/kdb_private.h
View File

@ -174,8 +174,11 @@ typedef struct _kdbtab {
short cmd_minlen; /* Minimum legal # command
* chars required */
kdb_cmdflags_t cmd_flags; /* Command behaviour flags */
struct list_head list_node; /* Command list */
bool is_dynamic; /* Command table allocation type */
} kdbtab_t;
extern void kdb_register_table(kdbtab_t *kp, size_t len);
extern int kdb_bt(int, const char **); /* KDB display back trace */
/* KDB breakpoint management functions */