Hello
I have the following link error adding new system
calls to FreeBSD kernel when it uses send()
or recv() with sockets.
> linking kernel
> rtp_unix.o: In function `_sys_send':
> rtp_unix.o(.text+0x1c8): undefined reference to `send'
Perhaps the problem is the system call's type in
syscalls.master file (show it below), because the
rtp_unix.c has calls to socket(), connect()
and bind() and it doesn't have the same problem.
Is the type COMPAT for compatibility with BSD4.3
system calls (COMPAT_43)?
Why?
You can look below in the files generated
from syscalls.master file:
init_sysent.c has the "compat" conditional statement
for send() and recv(). And syscalls.c has entries
"old.send" and "old.recv", for the other sockets
system calls are different.
What should I do to solve this link error ?
Can I change COMPAT type for STD type in
syscalls.master without problems?
Thanks for your help.
/* ---------------- syscalls.master ------------ */
; Processed to created init_sysent.c, syscalls.c and syscall.h.
; Columns: number type nargs namespc name alt{name,tag,rtyp}/comments
; types:
; STD always included
; COMPAT included on COMPAT #ifdef
97 STD BSD { int socket(int domain, int type, int protocol); }
98 STD BSD { int connect(int s, caddr_t name, int namelen); }
99 CPT_NOA BSD { int accept(int s, caddr_t name, int *anamelen); } \
accept accept_args int
101 COMPAT BSD { int send(int s, caddr_t buf, int len, int flags); }
102 COMPAT BSD { int recv(int s, caddr_t buf, int len, int flags); }
104 STD BSD { int bind(int s, caddr_t name, int namelen); }
/* ----------------- init_sysent.c ------------------ */
#ifdef COMPAT_43
#define compat(n, name) n, (sy_call_t *)__CONCAT(o,name)
#else
#define compat(n, name) 0, (sy_call_t *)nosys
#endif
{ 3, (sy_call_t *)socket }, /* 97 = socket */
{ 3, (sy_call_t *)connect }, /* 98 = connect */
{ compat(3,accept) }, /* 99 = old accept */
{ compat(4,send) }, /* 101 = old send */
{ compat(4,recv) }, /* 102 = old recv */
{ 3, (sy_call_t *)bind }, /* 104 = bind */
/* ---------------- syscalls.c ---------------- */
"socket", /* 97 = socket */
"connect", /* 98 = connect */
"old.accept", /* 99 = old accept */
"old.send", /* 101 = old send */
"old.recv", /* 102 = old recv */
"bind", /* 104 = bind */
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