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support signalfd4 step1

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This commit is contained in:
Tomoki Shirasawa
2015-03-18 17:35:43 +09:00
parent d53865ac5f
commit f5d935b703
4 changed files with 162 additions and 3 deletions
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71
executer/user/mcexec.c
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@ -57,6 +57,7 @@
#include <pthread.h>
#include <semaphore.h>
#include <signal.h>
#include <sys/signalfd.h>
#include "../include/uprotocol.h"
//#define DEBUG
@ -98,6 +99,13 @@ typedef unsigned char cc_t;
typedef unsigned int speed_t;
typedef unsigned int tcflag_t;
struct sigfd {
struct sigfd *next;
int sigpipe[2];
};
struct sigfd *sigfdtop;
#ifdef NCCS
#undef NCCS
#endif
@ -887,6 +895,64 @@ sendsig(int sig, siginfo_t *siginfo, void *context)
}
}
long
act_signalfd4(struct syscall_wait_desc *w)
{
struct sigfd *sfd;
struct sigfd *sb;
int mode = w->sr.args[0];
int flags;
int tmp;
int rc = 0;
struct signalfd_siginfo *info;
switch(mode){
case 0: /* new signalfd */
sfd = malloc(sizeof(struct sigfd));
tmp = w->sr.args[1];
flags = 0;
if(tmp & SFD_NONBLOCK)
flags |= O_NONBLOCK;
if(tmp & SFD_CLOEXEC)
flags |= O_CLOEXEC;
pipe2(sfd->sigpipe, flags);
sfd->next = sigfdtop;
sigfdtop = sfd;
rc = sfd->sigpipe[0];
break;
case 1: /* close signalfd */
tmp = w->sr.args[1];
for(sfd = sigfdtop, sb = NULL; sfd; sb = sfd, sfd = sfd->next)
if(sfd->sigpipe[0] == tmp)
break;
if(!sfd)
rc = -EBADF;
else{
if(sb)
sb->next = sfd->next;
else
sigfdtop = sfd->next;
close(sfd->sigpipe[0]);
close(sfd->sigpipe[1]);
free(sfd);
}
break;
case 2: /* push signal */
tmp = w->sr.args[1];
for(sfd = sigfdtop; sfd; sfd = sfd->next)
if(sfd->sigpipe[0] == tmp)
break;
if(!sfd)
rc = -EBADF;
else{
info = (struct signalfd_siginfo *)w->sr.args[2];
write(sfd->sigpipe[1], info, sizeof(struct signalfd_siginfo));
}
break;
}
return rc;
}
void
act_sigaction(struct syscall_wait_desc *w)
{
@ -1955,6 +2021,11 @@ return_execve2:
break;
}
case __NR_signalfd4:
ret = act_signalfd4(&w);
do_syscall_return(fd, cpu, ret, 0, 0, 0, 0);
break;
case __NR_rt_sigaction:
act_sigaction(&w);
do_syscall_return(fd, cpu, 0, 0, 0, 0, 0);