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freebsd/sys/kern/kern_module.c

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This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
/*-
* Copyright (c) 1997 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
Keep track of the containing file for modules. This is a bit of a hack, but I can't think of another (relatively) easy way of getting the info since the boot-time initialization is not done immediately after "loading". XXX module_register() gained an extra arg. This might break the alpha compile, if so, just add a zero to get the old behavior.
1998-10-10 00:03:07 +00:00
* $Id: kern_module.c,v 1.9 1998/10/03 11:05:45 dfr Exp $
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/sysproto.h>
#include <sys/sysent.h>
#include <sys/module.h>
#include <sys/linker.h>
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
1997-11-06 19:29:57 +00:00
#include <sys/proc.h>
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
#define M_MODULE M_TEMP /* XXX */
typedef TAILQ_HEAD(, module) modulelist_t;
struct module {
TAILQ_ENTRY(module) link; /* chain together all modules */
TAILQ_ENTRY(module) flink; /* all modules in a file */
struct linker_file* file; /* file which contains this module */
int refs; /* reference count */
int id; /* unique id number */
char *name; /* module name */
modeventhand_t handler; /* event handler */
void *arg; /* argument for handler */
};
#define MOD_EVENT(mod, type) (mod)->handler((mod), (type), (mod)->arg)
static modulelist_t modules;
static int nextid = 1;
static void module_shutdown(int, void*);
static void
module_init(void* arg)
{
TAILQ_INIT(&modules);
at_shutdown(module_shutdown, 0, SHUTDOWN_POST_SYNC);
}
Keep track of the containing file for modules. This is a bit of a hack, but I can't think of another (relatively) easy way of getting the info since the boot-time initialization is not done immediately after "loading". XXX module_register() gained an extra arg. This might break the alpha compile, if so, just add a zero to get the old behavior.
1998-10-10 00:03:07 +00:00
SYSINIT(module, SI_SUB_KLD, SI_ORDER_ANY, module_init, 0);
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
static void
module_shutdown(int arg1, void* arg2)
{
module_t mod;
for (mod = TAILQ_FIRST(&modules); mod; mod = TAILQ_NEXT(mod, link))
MOD_EVENT(mod, MOD_SHUTDOWN);
}
void
make a couple functions static... also change module_register_static to module_register_init as this function initalizes the module for both dynamic and static modules...
1997-10-24 05:29:07 +00:00
module_register_init(void *arg)
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
{
moduledata_t* data = (moduledata_t*) arg;
int error;
Keep track of the containing file for modules. This is a bit of a hack, but I can't think of another (relatively) easy way of getting the info since the boot-time initialization is not done immediately after "loading". XXX module_register() gained an extra arg. This might break the alpha compile, if so, just add a zero to get the old behavior.
1998-10-10 00:03:07 +00:00
error = module_register(data->name, data->evhand, data->priv, data->_file);
if (error)
Fixed printf format errors.
1998-07-11 07:46:16 +00:00
printf("module_register_init: module_register(%s, %lx, %p) returned %d",
Changed to the C9x draft spelling of the (unsigned) integral type suitable for holding object pointers (ptrint_t -> uintptr_t). Added corresponding signed type (intptr_t). Changed/added corresponding non-C9x types for function pointers to match. Don't use nonstandard types to implement these types, and don't comment on them in <machine/types.h>.
1998-07-14 05:09:48 +00:00
data->name, (u_long)(uintfptr_t)data->evhand, data->priv, error);
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
}
int
Keep track of the containing file for modules. This is a bit of a hack, but I can't think of another (relatively) easy way of getting the info since the boot-time initialization is not done immediately after "loading". XXX module_register() gained an extra arg. This might break the alpha compile, if so, just add a zero to get the old behavior.
1998-10-10 00:03:07 +00:00
module_register(const char* name, modeventhand_t handler, void* arg, void *file)
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
{
size_t namelen;
module_t newmod;
int error;
Keep track of the containing file for modules. This is a bit of a hack, but I can't think of another (relatively) easy way of getting the info since the boot-time initialization is not done immediately after "loading". XXX module_register() gained an extra arg. This might break the alpha compile, if so, just add a zero to get the old behavior.
1998-10-10 00:03:07 +00:00
linker_file_t container = file;
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
namelen = strlen(name) + 1;
newmod = (module_t) malloc(sizeof(struct module) + namelen,
M_MODULE, M_WAITOK);
if (newmod == 0)
return ENOMEM;
newmod->refs = 1;
newmod->id = nextid++;
newmod->name = (char *) (newmod + 1);
strcpy(newmod->name, name);
newmod->handler = handler;
newmod->arg = arg;
TAILQ_INSERT_TAIL(&modules, newmod, link);
Keep track of the containing file for modules. This is a bit of a hack, but I can't think of another (relatively) easy way of getting the info since the boot-time initialization is not done immediately after "loading". XXX module_register() gained an extra arg. This might break the alpha compile, if so, just add a zero to get the old behavior.
1998-10-10 00:03:07 +00:00
if (container == NULL)
container = linker_current_file;
if (container) {
TAILQ_INSERT_TAIL(&container->modules, newmod, flink);
newmod->file = container;
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
} else
newmod->file = 0;
if (error = MOD_EVENT(newmod, MOD_LOAD)) {
Send a MOD_UNLOAD event before deleting the module. if the MOD_LOAD event failed.
1998-10-03 11:05:45 +00:00
MOD_EVENT(newmod, MOD_UNLOAD);
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
module_release(newmod);
return error;
}
return 0;
}
void
module_reference(module_t mod)
{
MOD_DPF(REFS, ("module_reference: before, refs=%d\n", mod->refs));
mod->refs++;
}
void
module_release(module_t mod)
{
if (mod->refs <= 0)
panic("module_release: bad reference count");
MOD_DPF(REFS, ("module_release: before, refs=%d\n", mod->refs));
mod->refs--;
if (mod->refs == 0) {
TAILQ_REMOVE(&modules, mod, link);
if (mod->file) {
TAILQ_REMOVE(&mod->file->modules, mod, flink);
}
free(mod, M_MODULE);
}
}
module_t
module_lookupbyname(const char* name)
{
module_t mod;
for (mod = TAILQ_FIRST(&modules); mod; mod = TAILQ_NEXT(mod, link)) {
if (!strcmp(mod->name, name))
return mod;
}
return 0;
}
module_t
module_lookupbyid(int modid)
{
module_t mod;
for (mod = TAILQ_FIRST(&modules); mod; mod = TAILQ_NEXT(mod, link)) {
if (mod->id == modid)
return mod;
}
return 0;
}
int
module_unload(module_t mod)
{
return MOD_EVENT(mod, MOD_UNLOAD);
}
int
module_getid(module_t mod)
{
return mod->id;
}
module_t
module_getfnext(module_t mod)
{
return TAILQ_NEXT(mod, flink);
}
/*
* Syscalls.
*/
int
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
1997-11-06 19:29:57 +00:00
modnext(struct proc* p, struct modnext_args* uap)
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
{
module_t mod;
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
1997-11-06 19:29:57 +00:00
p->p_retval[0] = -1;
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
if (SCARG(uap, modid) == 0) {
mod = TAILQ_FIRST(&modules);
if (mod) {
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
1997-11-06 19:29:57 +00:00
p->p_retval[0] = mod->id;
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
return 0;
} else
return ENOENT;
}
mod = module_lookupbyid(SCARG(uap, modid));
if (!mod)
return ENOENT;
if (TAILQ_NEXT(mod, link))
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
1997-11-06 19:29:57 +00:00
p->p_retval[0] = TAILQ_NEXT(mod, link)->id;
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
else
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
1997-11-06 19:29:57 +00:00
p->p_retval[0] = 0;
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
return 0;
}
int
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
1997-11-06 19:29:57 +00:00
modfnext(struct proc* p, struct modfnext_args* uap)
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
{
module_t mod;
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
1997-11-06 19:29:57 +00:00
p->p_retval[0] = -1;
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
mod = module_lookupbyid(SCARG(uap, modid));
if (!mod)
return ENOENT;
if (TAILQ_NEXT(mod, flink))
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
1997-11-06 19:29:57 +00:00
p->p_retval[0] = TAILQ_NEXT(mod, flink)->id;
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
else
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
1997-11-06 19:29:57 +00:00
p->p_retval[0] = 0;
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
return 0;
}
int
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
1997-11-06 19:29:57 +00:00
modstat(struct proc* p, struct modstat_args* uap)
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
{
module_t mod;
int error = 0;
int namelen;
int version;
struct module_stat* stat;
mod = module_lookupbyid(SCARG(uap, modid));
if (!mod)
return ENOENT;
stat = SCARG(uap, stat);
/*
* Check the version of the user's structure.
*/
if (error = copyin(&stat->version, &version, sizeof(version)))
goto out;
if (version != sizeof(struct module_stat)) {
error = EINVAL;
goto out;
}
namelen = strlen(mod->name) + 1;
if (namelen > MAXMODNAME)
namelen = MAXMODNAME;
if (error = copyout(mod->name, &stat->name[0], namelen))
goto out;
if (error = copyout(&mod->refs, &stat->refs, sizeof(int)))
goto out;
if (error = copyout(&mod->id, &stat->id, sizeof(int)))
goto out;
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
1997-11-06 19:29:57 +00:00
p->p_retval[0] = 0;
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
out:
return error;
}
int
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
1997-11-06 19:29:57 +00:00
modfind(struct proc* p, struct modfind_args* uap)
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
{
int error = 0;
char name[MAXMODNAME];
module_t mod;
if (error = copyinstr(SCARG(uap, name), name, sizeof name, 0))
goto out;
mod = module_lookupbyname(name);
if (!mod)
error = ENOENT;
else
Move the "retval" (3rd) parameter from all syscall functions and put it in struct proc instead. This fixes a boatload of compiler warning, and removes a lot of cruft from the sources. I have not removed the /*ARGSUSED*/, they will require some looking at. libkvm, ps and other userland struct proc frobbing programs will need recompiled.
1997-11-06 19:29:57 +00:00
p->p_retval[0] = mod->id;
This is the kernel linker. To use it, you will first need to apply the patches in freefall:/home/dfr/ld.diffs to your ld sources and set BINFORMAT to aoutkld when linking the kernel. Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
out:
return error;
}
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