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Commit 67fc4e0c authored by Jason Wessel's avatar Jason Wessel
Browse files

kdb: core for kgdb back end (2 of 2) 



This patch contains the hooks and instrumentation into kernel which
live outside the kernel/debug directory, which the kdb core
will call to run commands like lsmod, dmesg, bt etc...

CC: linux-arch@vger.kernel.org
Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
Signed-off-by: default avatarMartin Hicks <mort@sgi.com>
parent 5d5314d6

arch/arm/include/asm/kmap_types.h

+1 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ enum km_type { 
	KM_SOFTIRQ1,

	KM_L1_CACHE,

	KM_L2_CACHE,

	KM_KDB,

	KM_TYPE_NR

};

arch/powerpc/include/asm/kmap_types.h

+1 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ enum km_type { 
	KM_SOFTIRQ1,

	KM_PPC_SYNC_PAGE,

	KM_PPC_SYNC_ICACHE,

	KM_KDB,

	KM_TYPE_NR

};

include/asm-generic/kmap_types.h

+2 −1
Original line number Diff line number Diff line
@@ -28,7 +28,8 @@ KMAP_D(15) KM_UML_USERCOPY, 
KMAP_D(16)	KM_IRQ_PTE,

KMAP_D(17)	KM_NMI,

KMAP_D(18)	KM_NMI_PTE,

KMAP_D(19)	KM_TYPE_NR

KMAP_D(19)	KM_KDB,

KMAP_D(20)	KM_TYPE_NR

};



#undef KMAP_D

init/main.c

+2 −0
Original line number Diff line number Diff line
@@ -62,6 +62,7 @@ 
#include <linux/sched.h>

#include <linux/signal.h>

#include <linux/idr.h>

#include <linux/kdb.h>

#include <linux/ftrace.h>

#include <linux/async.h>

#include <linux/kmemcheck.h>
@@ -675,6 +676,7 @@ asmlinkage void __init start_kernel(void) 
	buffer_init();

	key_init();

	security_init();

	kdb_init(KDB_INIT_FULL);

	vfs_caches_init(totalram_pages);

	signals_init();

	/* rootfs populating might need page-writeback */

kernel/kallsyms.c

+21 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include <linux/init.h>

#include <linux/seq_file.h>

#include <linux/fs.h>

#include <linux/kdb.h>

#include <linux/err.h>

#include <linux/proc_fs.h>

#include <linux/sched.h>	/* for cond_resched */
@@ -516,6 +517,26 @@ static int kallsyms_open(struct inode *inode, struct file *file) 
	return ret;

}



#ifdef	CONFIG_KGDB_KDB

const char *kdb_walk_kallsyms(loff_t *pos)

{

	static struct kallsym_iter kdb_walk_kallsyms_iter;

	if (*pos == 0) {

		memset(&kdb_walk_kallsyms_iter, 0,

		       sizeof(kdb_walk_kallsyms_iter));

		reset_iter(&kdb_walk_kallsyms_iter, 0);

	}

	while (1) {

		if (!update_iter(&kdb_walk_kallsyms_iter, *pos))

			return NULL;

		++*pos;

		/* Some debugging symbols have no name.  Ignore them. */

		if (kdb_walk_kallsyms_iter.name[0])

			return kdb_walk_kallsyms_iter.name;

	}

}

#endif	/* CONFIG_KGDB_KDB */



static const struct file_operations kallsyms_operations = {

	.open = kallsyms_open,

	.read = seq_read,