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linux-user: add a function hook to translate sockaddr

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Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Laurent Vivier 2015-10-28 21:40:44 +01:00 committed by Riku Voipio
parent 5d4d366585
commit 7b36f78274
1 changed files with 21 additions and 6 deletions
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27
linux-user/syscall.c
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@ -296,9 +296,11 @@ static bitmask_transtbl fcntl_flags_tbl[] = {
}; };
typedef abi_long (*TargetFdDataFunc)(void *, size_t); typedef abi_long (*TargetFdDataFunc)(void *, size_t);
typedef abi_long (*TargetFdAddrFunc)(void *, abi_ulong, socklen_t);
typedef struct TargetFdTrans { typedef struct TargetFdTrans {
TargetFdDataFunc host_to_target_data; TargetFdDataFunc host_to_target_data;
TargetFdDataFunc target_to_host_data; TargetFdDataFunc target_to_host_data;
TargetFdAddrFunc target_to_host_addr;
} TargetFdTrans; } TargetFdTrans;
static TargetFdTrans **target_fd_trans; static TargetFdTrans **target_fd_trans;
@ -313,6 +315,14 @@ static TargetFdDataFunc fd_trans_host_to_target_data(int fd)
return NULL; return NULL;
} }
static TargetFdAddrFunc fd_trans_target_to_host_addr(int fd)
{
if (fd < target_fd_max && target_fd_trans[fd]) {
return target_fd_trans[fd]->target_to_host_addr;
}
return NULL;
}
static void fd_trans_register(int fd, TargetFdTrans *trans) static void fd_trans_register(int fd, TargetFdTrans *trans)
{ {
unsigned int oldmax; unsigned int oldmax;
@ -1162,7 +1172,7 @@ static inline abi_long target_to_host_ip_mreq(struct ip_mreqn *mreqn,
return 0; return 0;
} }
static inline abi_long target_to_host_sockaddr(struct sockaddr *addr, static inline abi_long target_to_host_sockaddr(int fd, struct sockaddr *addr,
abi_ulong target_addr, abi_ulong target_addr,
socklen_t len) socklen_t len)
{ {
@ -1170,6 +1180,10 @@ static inline abi_long target_to_host_sockaddr(struct sockaddr *addr,
sa_family_t sa_family; sa_family_t sa_family;
struct target_sockaddr *target_saddr; struct target_sockaddr *target_saddr;
if (fd_trans_target_to_host_addr(fd)) {
return fd_trans_target_to_host_addr(fd)(addr, target_addr, len);
}
target_saddr = lock_user(VERIFY_READ, target_addr, len, 1); target_saddr = lock_user(VERIFY_READ, target_addr, len, 1);
if (!target_saddr) if (!target_saddr)
return -TARGET_EFAULT; return -TARGET_EFAULT;
@ -2115,7 +2129,7 @@ static abi_long do_bind(int sockfd, abi_ulong target_addr,
addr = alloca(addrlen+1); addr = alloca(addrlen+1);
ret = target_to_host_sockaddr(addr, target_addr, addrlen); ret = target_to_host_sockaddr(sockfd, addr, target_addr, addrlen);
if (ret) if (ret)
return ret; return ret;
@ -2135,7 +2149,7 @@ static abi_long do_connect(int sockfd, abi_ulong target_addr,
addr = alloca(addrlen+1); addr = alloca(addrlen+1);
ret = target_to_host_sockaddr(addr, target_addr, addrlen); ret = target_to_host_sockaddr(sockfd, addr, target_addr, addrlen);
if (ret) if (ret)
return ret; return ret;
@ -2155,8 +2169,9 @@ static abi_long do_sendrecvmsg_locked(int fd, struct target_msghdr *msgp,
if (msgp->msg_name) { if (msgp->msg_name) {
msg.msg_namelen = tswap32(msgp->msg_namelen); msg.msg_namelen = tswap32(msgp->msg_namelen);
msg.msg_name = alloca(msg.msg_namelen+1); msg.msg_name = alloca(msg.msg_namelen+1);
ret = target_to_host_sockaddr(msg.msg_name, tswapal(msgp->msg_name), ret = target_to_host_sockaddr(fd, msg.msg_name,
msg.msg_namelen); tswapal(msgp->msg_name),
msg.msg_namelen);
if (ret) { if (ret) {
goto out2; goto out2;
} }
@ -2418,7 +2433,7 @@ static abi_long do_sendto(int fd, abi_ulong msg, size_t len, int flags,
return -TARGET_EFAULT; return -TARGET_EFAULT;
if (target_addr) { if (target_addr) {
addr = alloca(addrlen+1); addr = alloca(addrlen+1);
ret = target_to_host_sockaddr(addr, target_addr, addrlen); ret = target_to_host_sockaddr(fd, addr, target_addr, addrlen);
if (ret) { if (ret) {
unlock_user(host_msg, msg, 0); unlock_user(host_msg, msg, 0);
return ret; return ret;