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authorJason Wessel <jason.wessel@windriver.com>2010-05-20 22:04:29 -0400
committerJason Wessel <jason.wessel@windriver.com>2010-05-20 22:04:29 -0400
commit0b4b3827db386ec6034a5aba1261025b039440c2 (patch)
treea3469de6930fe3e850c8e4c49c26a2a3b53612dd /include/linux/kgdb.h
parent29c843912a0baa7fa63033fe28e1ca7e796686a5 (diff)
x86, kgdb, init: Add early and late debug states
The kernel debugger can operate well before mm_init(), but the x86 hardware breakpoint code which uses the perf api requires that the kernel allocators are initialized. This means the kernel debug core needs to provide an optional arch specific call back to allow the initialization functions to run after the kernel has been further initialized. The kdb shell already had a similar restriction with an early initialization and late initialization. The kdb_init() was moved into the debug core's version of the late init which is called dbg_late_init(); CC: kgdb-bugreport@lists.sourceforge.net Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Diffstat (limited to 'include/linux/kgdb.h')
-rw-r--r--include/linux/kgdb.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h
index 6c784ab6856a..9340f34d1bb5 100644
--- a/include/linux/kgdb.h
+++ b/include/linux/kgdb.h
@@ -208,6 +208,17 @@ extern int kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr);
208extern int kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle); 208extern int kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle);
209 209
210/** 210/**
211 * kgdb_arch_late - Perform any architecture specific initalization.
212 *
213 * This function will handle the late initalization of any
214 * architecture specific callbacks. This is an optional function for
215 * handling things like late initialization of hw breakpoints. The
216 * default implementation does nothing.
217 */
218extern void kgdb_arch_late(void);
219
220
221/**
211 * struct kgdb_arch - Describe architecture specific values. 222 * struct kgdb_arch - Describe architecture specific values.
212 * @gdb_bpt_instr: The instruction to trigger a breakpoint. 223 * @gdb_bpt_instr: The instruction to trigger a breakpoint.
213 * @flags: Flags for the breakpoint, currently just %KGDB_HW_BREAKPOINT. 224 * @flags: Flags for the breakpoint, currently just %KGDB_HW_BREAKPOINT.
@@ -285,7 +296,10 @@ extern int kgdb_single_step;
285extern atomic_t kgdb_active; 296extern atomic_t kgdb_active;
286#define in_dbg_master() \ 297#define in_dbg_master() \
287 (raw_smp_processor_id() == atomic_read(&kgdb_active)) 298 (raw_smp_processor_id() == atomic_read(&kgdb_active))
299extern bool dbg_is_early;
300extern void __init dbg_late_init(void);
288#else /* ! CONFIG_KGDB */ 301#else /* ! CONFIG_KGDB */
289#define in_dbg_master() (0) 302#define in_dbg_master() (0)
303#define dbg_late_init()
290#endif /* ! CONFIG_KGDB */ 304#endif /* ! CONFIG_KGDB */
291#endif /* _KGDB_H_ */ 305#endif /* _KGDB_H_ */