linux/kernel/module/kdb.c
Christophe Leroy 01dc0386ef module: Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC
Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC to allow architectures
to request having modules data in vmalloc area instead of module area.

This is required on powerpc book3s/32 in order to set data non
executable, because it is not possible to set executability on page
basis, this is done per 256 Mbytes segments. The module area has exec
right, vmalloc area has noexec.

This can also be useful on other powerpc/32 in order to maximize the
chance of code being close enough to kernel core to avoid branch
trampolines.

Cc: Jason Wessel <jason.wessel@windriver.com>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
[mcgrof: rebased in light of kernel/module/kdb.c move]
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
2022-04-05 08:43:05 -07:00

63 lines
1.4 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Module kdb support
*
* Copyright (C) 2010 Jason Wessel
*/
#include <linux/module.h>
#include <linux/kdb.h>
#include "internal.h"
/*
* kdb_lsmod - This function implements the 'lsmod' command. Lists
* currently loaded kernel modules.
* Mostly taken from userland lsmod.
*/
int kdb_lsmod(int argc, const char **argv)
{
struct module *mod;
if (argc != 0)
return KDB_ARGCOUNT;
kdb_printf("Module Size modstruct Used by\n");
list_for_each_entry(mod, &modules, list) {
if (mod->state == MODULE_STATE_UNFORMED)
continue;
kdb_printf("%-20s%8u", mod->name, mod->core_layout.size);
#ifdef CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC
kdb_printf("/%8u", mod->data_layout.size);
#endif
kdb_printf(" 0x%px ", (void *)mod);
#ifdef CONFIG_MODULE_UNLOAD
kdb_printf("%4d ", module_refcount(mod));
#endif
if (mod->state == MODULE_STATE_GOING)
kdb_printf(" (Unloading)");
else if (mod->state == MODULE_STATE_COMING)
kdb_printf(" (Loading)");
else
kdb_printf(" (Live)");
kdb_printf(" 0x%px", mod->core_layout.base);
#ifdef CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC
kdb_printf("/0x%px", mod->data_layout.base);
#endif
#ifdef CONFIG_MODULE_UNLOAD
{
struct module_use *use;
kdb_printf(" [ ");
list_for_each_entry(use, &mod->source_list,
source_list)
kdb_printf("%s ", use->target->name);
kdb_printf("]\n");
}
#endif
}
return 0;
}