我是FreeBSD的初学者。我在VM上安装了FreeBSD-11.0版本-amd64 64。我想添加第一个新的系统调用,它用于计算两个值的和。但是我的函数有错误!mykern.c
#include <sys/sysproto.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/sysent.h>
struct myargs {
unsigned int k0;
unsigned int k1;
};
int sys_func(struct thread *td, struct myargs *uap);
int sys_func (struct thread *td, struct myargs *uap)
{
unsigned int a,b,c;
a = uap->k0;
b = uap->k1;
c = a + b;
printf("%u + %u = %u\n",a,b,c);
return (0);
}艾罗!
usr/src/sys/kern/mykern.c:17:5:错误:“sys_func”int sys_func的冲突类型(struct线程*td,struct *uap) /usr/src/sys/sys/syspri.h:2180:5:注意:前面的声明在int sys_func中( struct func_args *,struct func_args *);
我读了https://wiki.freebsd.org/AddingSyscalls的一个部分
After adding an entry to sys/kern/syscalls.master, you must regenerate the generated files in sys/kern and sys/sys:
$ make -C sys/kern/ sysent
mv -f init_sysent.c init_sysent.c.bak
mv -f syscalls.c syscalls.c.bak
mv -f systrace_args.c systrace_args.c.bak
mv -f ../sys/syscall.h ../sys/syscall.h.bak
mv -f ../sys/syscall.mk ../sys/syscall.mk.bak
mv -f ../sys/sysproto.h ../sys/sysproto.h.bak
sh makesyscalls.sh syscalls.master我检查了syspro.h文件,并在其中:
struct func_args {
char uap_l_[PADL_(struct myargs *)]; struct myargs * uap; char uap_r_[PADR_(struct myargs *)];
};
sys_func(struct thread *, struct func_args*);func_args是什么?有什么解决办法吗?
发布于 2017-02-15 19:09:25
我编辑了我的代码,所以没有错误。我希望它能对其他人有所帮助。
#include <sys/sysproto.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/sysent.h>
#ifndef _SYS_SYSPROTO_H_
struct func_args {
unsigned int k0;
unsigned int k1;
};
#endif
int sys_func (struct thread *td, struct func_args *uap)
{
unsigned int a,b,c;
a = uap->k0;
b = uap->k1;
c = a + b;
printf("%u + %u = %u\n",a,b,c);
return (0);
}https://stackoverflow.com/questions/42235183
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