Meena Ramamoorthi wrote:
>
> Hi all,
>
> Has anybody tried using kernel_thread under montavista - IBM 405GP PPC
> hardhat LINUX kernel. ( 2.4 ) If so could you please reply to this. We have
> problem in exporting this. kernel_thread unresolved.
>
> Early answer appreciated
>
> Thanks and best regards,
> Meenakshi
The symbol is there. I'll attach a trivial module that accesses the symbol
successfully.
-Frank
--
Frank Rowand <frank_rowand at mvista.com>
MontaVista Software, Inc
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#include <linux/module.h>
#include <linux/version.h>
#include <asm/processor.h>
#define VUFX "00.12.12.b"
#ifdef MODULE
static int demo;
MODULE_PARM(demo, "i");
MODULE_PARM_DESC(demo ,"Demo of messages");
MODULE_DESCRIPTION("Demo driver");
MODULE_AUTHOR("Frank Rowand");
#endif
static int other_data;
void cleanup_module(void)
{
printk("<1>\nGoodbye cruel world\n\n");
other_data = 666;
}
int init_module(void)
{
other_data = 333;
printk("<1>\nHello World " VUFX "\n");
if (demo == 0) {
printk("<1>setting demo to default value\n");
demo = 42;
}
printk("<1>the demo var = %d\n",demo);
printk("<1>\n");
printk("kernel_thread() = 0x%p\n", kernel_thread);
printk("<1>\n");
return 0;
}
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CC=/opt/hardhat/devkit/ppc/4xx/bin/ppc_4xx-gcc
LD=/opt/hardhat/devkit/ppc/4xx/bin/ppc_4xx-ld
INCLUDEDIR=/opt/hardhat/devkit/ppc/4xx/powerpc-hardhat-linux/include
CFLAGS = -g -D__KERNEL__ -DMODULE -o -Wall -I$(INCLUDEDIR)
INSTALL_ROOT=/opt/hardhat/devkit/ppc/4xx/target
INSTALL_USER_ROOT=$(INSTALL_ROOT)/home/$(USER)
# Extract version number from headers
VER = $(shell awk -F\" '/REL/ {print $$2}' $(INCLUDEDIR)/linux/version.h)
OBJS = hello.o
all: hello_module.o
hello_module.o: $(OBJS)
$(LD) -r $^ -o $@
install:
install -c hello_module.o $(INSTALL_USER_ROOT)
# install -d $(INSTALL_ROOT)/lib/modules/misc
# install -d $(INSTALL_ROOT)/lib/modules/$(VER)/misc
# install -c hello_module.o $(INSTALL_ROOT)/lib/modules/$(VER)/misc
# install -c hello_module.o $(INSTALL_ROOT)/lib/modules/misc
clean_target:
rm $(INSTALL_USER_ROOT)/hello_module.o
# rm $(INSTALL_ROOT)/lib/modules/$(VER)/misc/hello_module.o
# rm $(INSTALL_ROOT)/lib/modules/misc/hello_module.o
clean: clean_target
rm $(OBJS) hello_module.o
