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authorDaniel Thompson <daniel.thompson@linaro.org>2014-11-06 14:36:45 +0000
committerJason Wessel <jason.wessel@windriver.com>2014-11-11 09:31:52 -0600
commit9452e977ac17caf9f98a91b33d5e3c3357258c64 (patch)
tree7a218cc1706c3c3842f73b6c03d8afc6a34f61ae /include/linux/kdb.h
parente8ab24d9b0173ada3eeed31d7d7f982228efc2c5 (diff)
downloadlinux-linaro-stable-9452e977ac17caf9f98a91b33d5e3c3357258c64.tar.gz
kdb: Categorize kdb commands (similar to SysRq categorization)
This patch introduces several new flags to collect kdb commands into groups (later allowing them to be optionally disabled). This follows similar prior art to enable/disable magic sysrq commands. The commands have been categorized as follows: Always on: go (w/o args), env, set, help, ?, cpu (w/o args), sr, dmesg, disable_nmi, defcmd, summary, grephelp Mem read: md, mdr, mdp, mds, ef, bt (with args), per_cpu Mem write: mm Reg read: rd Reg write: go (with args), rm Inspect: bt (w/o args), btp, bta, btc, btt, ps, pid, lsmod Flow ctrl: bp, bl, bph, bc, be, bd, ss Signal: kill Reboot: reboot All: cpu, kgdb, (and all of the above), nmi_console Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Diffstat (limited to 'include/linux/kdb.h')
-rw-r--r--include/linux/kdb.h48
1 files changed, 46 insertions, 2 deletions
diff --git a/include/linux/kdb.h b/include/linux/kdb.h
index 39b44b37c8dc..f1fe36185c17 100644
--- a/include/linux/kdb.h
+++ b/include/linux/kdb.h
@@ -13,9 +13,53 @@
* Copyright (C) 2009 Jason Wessel <jason.wessel@windriver.com>
*/
+/* Shifted versions of the command enable bits are be used if the command
+ * has no arguments (see kdb_check_flags). This allows commands, such as
+ * go, to have different permissions depending upon whether it is called
+ * with an argument.
+ */
+#define KDB_ENABLE_NO_ARGS_SHIFT 10
+
typedef enum {
- KDB_REPEAT_NO_ARGS = 0x1, /* Repeat the command w/o arguments */
- KDB_REPEAT_WITH_ARGS = 0x2, /* Repeat the command w/ its arguments */
+ KDB_ENABLE_ALL = (1 << 0), /* Enable everything */
+ KDB_ENABLE_MEM_READ = (1 << 1),
+ KDB_ENABLE_MEM_WRITE = (1 << 2),
+ KDB_ENABLE_REG_READ = (1 << 3),
+ KDB_ENABLE_REG_WRITE = (1 << 4),
+ KDB_ENABLE_INSPECT = (1 << 5),
+ KDB_ENABLE_FLOW_CTRL = (1 << 6),
+ KDB_ENABLE_SIGNAL = (1 << 7),
+ KDB_ENABLE_REBOOT = (1 << 8),
+ /* User exposed values stop here, all remaining flags are
+ * exclusively used to describe a commands behaviour.
+ */
+
+ KDB_ENABLE_ALWAYS_SAFE = (1 << 9),
+ KDB_ENABLE_MASK = (1 << KDB_ENABLE_NO_ARGS_SHIFT) - 1,
+
+ KDB_ENABLE_ALL_NO_ARGS = KDB_ENABLE_ALL << KDB_ENABLE_NO_ARGS_SHIFT,
+ KDB_ENABLE_MEM_READ_NO_ARGS = KDB_ENABLE_MEM_READ
+ << KDB_ENABLE_NO_ARGS_SHIFT,
+ KDB_ENABLE_MEM_WRITE_NO_ARGS = KDB_ENABLE_MEM_WRITE
+ << KDB_ENABLE_NO_ARGS_SHIFT,
+ KDB_ENABLE_REG_READ_NO_ARGS = KDB_ENABLE_REG_READ
+ << KDB_ENABLE_NO_ARGS_SHIFT,
+ KDB_ENABLE_REG_WRITE_NO_ARGS = KDB_ENABLE_REG_WRITE
+ << KDB_ENABLE_NO_ARGS_SHIFT,
+ KDB_ENABLE_INSPECT_NO_ARGS = KDB_ENABLE_INSPECT
+ << KDB_ENABLE_NO_ARGS_SHIFT,
+ KDB_ENABLE_FLOW_CTRL_NO_ARGS = KDB_ENABLE_FLOW_CTRL
+ << KDB_ENABLE_NO_ARGS_SHIFT,
+ KDB_ENABLE_SIGNAL_NO_ARGS = KDB_ENABLE_SIGNAL
+ << KDB_ENABLE_NO_ARGS_SHIFT,
+ KDB_ENABLE_REBOOT_NO_ARGS = KDB_ENABLE_REBOOT
+ << KDB_ENABLE_NO_ARGS_SHIFT,
+ KDB_ENABLE_ALWAYS_SAFE_NO_ARGS = KDB_ENABLE_ALWAYS_SAFE
+ << KDB_ENABLE_NO_ARGS_SHIFT,
+ KDB_ENABLE_MASK_NO_ARGS = KDB_ENABLE_MASK << KDB_ENABLE_NO_ARGS_SHIFT,
+
+ KDB_REPEAT_NO_ARGS = 0x40000000, /* Repeat the command w/o arguments */
+ KDB_REPEAT_WITH_ARGS = 0x80000000, /* Repeat the command with args */
} kdb_cmdflags_t;
typedef int (*kdb_func_t)(int, const char **);