static void ps_print_level(int level, proc_p p) {
/* pid ppid envid pgrp session xstat stat flag nxch */
#define MAXLEVEL 4
int i;
int epilogue_count, yield_count;
#if 0
char state[] = "XIRSHZ";
#endif
if (level == -1) {
printf("PID ");
for (i = 0; i < MAXLEVEL; i++) printf(" ");
#if 0
printf("PPID PG SES ");
printf("sta xst flag nx ");
printf("ticks ctxcnt eip name\n");
#else
printf (" TICKS\tCTXCNT\tEIP\t\tNAME\t\tEID\n\n");
#endif
return;
}
if (level > MAXLEVEL) level = MAXLEVEL;
for (i = 0; i < level; i++) printf(" ");
if (p == NULL) {printf(" null proc entry\n");return;}
printf("%-3d",p->p_pid);
for (i = level; i <= MAXLEVEL; i++) printf(" ");
#if 0
printf("%3d ",(p->p_pptr) ? p->p_pptr->p_pid : -1);
printf("%3d ",(p->p_pgrp) ? p->p_pgrp->pg_id : -1);
printf("%3d ",(p->p_session->s_leader) ? p->p_session->s_leader->p_pid : -1);
printf("%c %3d %4s %3d ",
state[p->p_stat], p->p_xstat, ps_get_flags(p->p_flag), p->nxchildren);
#endif
epilogue_count = 0;
yield_count = 0;
get_counts(p->envid, &epilogue_count, &yield_count);
printf("\t%5d\t%6d\t%08x\t%.10s",
__envs[envidx(p->envid)].env_ticks,
__envs[envidx(p->envid)].env_ctxcnt, /* epilogue_count, */
(p->envid == __envid || p->p_stat == SZOMB) ? 0 : get_eip(p->envid),
ps_get_comm(p->envid,1));
if (strlen (ps_get_comm (p->envid,1)) < 8)
printf ("\t\t");
else
printf ("\t");
printf ("%d\n", p->envid);
for (p = p->p_children.lh_first; p != 0; p = p->p_sibling.le_next) {
ps_print_level(level+1,p);
}
}
static unsigned int get_eip (u_int envid) {
unsigned int esp;
unsigned int eip = 0;
struct Env *e = (struct Env *)&__envs[envidx (envid)];
esp = e->env_tf.tf_esp + 44;
/* check if pid is saving its fpu state */
{
struct Uenv cu;
int ret;
if ((ret = sys_rdu(CAP_ROOT,e->env_id,&cu)) >= 0) {
if (cu.u_fpu) esp += FPU_SAVE_SZ;
}
/* if this fails, read_write_memory will fail too. */
}
eip = read_write_memory (PT_READ_D, envid, esp, 0);
return (eip);
}
void
ae_eth_init()
{
int i,fid;
extern void print_physical(int page);
if (envidx(__envid) == 1) {
AllocAshShareRegion();
ASN.nfree = 0;
for (i = 0; i < NENTRY; i++) {
ASN.ae_packets[i].recv.r[0].data = &asn.ash_pkt_data[i * MAXPKT];
ASN.ae_packets[i].recv.r[0].sz = MAXPKT;
ASN.ae_packets[i].recv.n = 1;
ASN.nfree++;
ae_ash_append_pkt(&asn.ash_alloc_pkt, &ASN.ae_packets[i]);
}
for (fid = 0; fid < DPF_MAXFILT; fid++) {
FID_HEAD_QUEUE = 0;
FID_TAIL_QUEUE = 0;
}
}
}
/* everything is based on this exec, we have an extra flag
(_EXEC_EXECONLY) to differentiate between the exec and fork_exec
families. the difference is that the latter forks and then execs
the process thereby returning in the parent
*/
static int
fork_execve0(const char *path, char *const argv[], char * const envptr[],
int fd, u_int flags)
{
u_int k = 0;
int target_cpu = 0;
struct Uenv cu;
int NewPid = 0;
int envid = 0; /* XXX -- init to supress warning */
char **old_argv = (char **)argv;
int r, exec_format;
struct Env e;
OSCALLENTER(OSCALL_execve);
/* verify executable permission */
if (!(flags & _EXEC_USE_FD) && access(path, X_OK) == -1) {
/* access will set errno */
r = -errno;
goto err;
}
if (!(envid = sys_env_alloc (0, &r))) {
fprintf(stderr,"could not sys_env_alloc\n");
r = -ENOEXEC;
goto err;
}
e = __envs[envidx(envid)];
if ((exec_format = fork_execve0_part2(path, argv, envptr, &e, fd, flags)) < 0)
goto err_env_free;
/* write environment */
if ((r = sys_wrenv (k, envid, &e)) < 0) {
kprintf ("sys_wrenv failed\n");
r = -ENOEXEC;
goto err;
}
if (ExecuteOnExecHandlers(k, envid, flags & _EXEC_EXECONLY) == -1) {
fprintf(stderr,"cleanup code not done yet\n");
assert(-1);
}
#ifdef PROCESS_TABLE
if (flags & _EXEC_EXECONLY) {
/* because true exec */
NewPid = getpid();
dlockputs(__PROCD_LD,"fork_execve0 get lock ");
EXOS_LOCK(PROCINFO_LOCK);
dlockputs(__PROCD_LD,"... got lock\n");
EnterCritical ();
ProcChangeEnv(NewPid,envid);
EXOS_UNLOCK(PROCINFO_LOCK);
dlockputs(__PROCD_LD,"fork_execve0 release lock\n");
ExitCritical ();
} else {
/* because we are forking */
NewPid = AllocateFreePid (envid);
}
cu = UAREA;
if (!execonly) {
AddProcEntry (&cu, (char *)path, (char **)argv, NewPid, UAREA.pid);
if ((cu.parent_slot = GetChildSlot (NewPid)) < 0) {
r = -ENOEXEC;
goto err_env_free;
}
} else {
/* TO TOM: what do we do this for?
strncpy (UAREA.name, (char*)(((u_int)argv[0]) + ARGV_START_LOCAL - ARGV_START),
U_NAMEMAX-1);
UAREA.name[U_NAMEMAX-1] = '\0'; */
}
/* XXX -- on an exec we'll forget to unref our children's pids */
/* TO TOM: shouldnt this clearchildinfo be at the top */
ClearChildInfo (&cu);
#else
#ifdef PROCD
if (flags & _EXEC_EXECONLY)
{
NewPid = getpid();
/* only register us if we are of the right format */
if (exec_format == EXEC_EXOS_AOUT)
proc_exec(envid);
} else {
NewPid = proc_fork(envid);
}
cu = UAREA;
//kprintf("NewPid %d envid: %d %s proc_%s: (%d) -> %d\n",
//NewPid,__envid,execonly ? "exec" : "fork",path,envid,NewPid);
#else
NewPid = envid;
#endif /* PROCD */
#endif /* PROCESS_TABLE */
strncpy (cu.name, path, U_NAMEMAX-1);
cu.name[U_NAMEMAX-1] = '\0';
cu.u_fpu = 0;
cu.u_in_critical = 0;
cu.u_status = U_RUN;
cu.u_entprologue = e.env_tf.tf_eip;
cu.u_entepilogue = e.env_tf.tf_eip;
cu.u_entfault = 0;
cu.u_entipc1 = 0;
cu.u_entipc2 = 0;
cu.u_ppc = 0;
#ifdef PROCESS_TABLE
cu.u_chld_state_chng = 0;
#endif /* PROCESS_TABLE */
cu.u_next_timeout = 0;
cu.u_in_pfault = 0;
cu.u_donate = -1;
cu.u_yield_count = 0;
cu.u_epilogue_count = 0;
cu.u_epilogue_abort_count = 0;
STOPP(misc,step7);
ISTART(misc,step8);
cu.u_start_kern_call_counting = 0;
if ((r = sys_wru (0, envid, &cu)) < 0) {
fprintf (stderr,"sys_wru failed\n");
r = -ENOEXEC;
goto err_env_free;
}
target_cpu = 0;
#ifdef __SMP__
if (strncmp(path,"_cpu",4)==0 && strlen(path)>4)
{
target_cpu = path[4]-'0';
if (target_cpu<0 || target_cpu>sys_get_num_cpus()-1)
target_cpu = 0;
}
#endif
/* we can't do this until all the child state is setup */
if ((r = sys_quantum_alloc (k, -1, target_cpu, envid)) < 0) {
fprintf (stderr,"could not alloc quantum\n");
r = -ENOEXEC;
goto err_env_free;
}
/* if we're doing a true unix exec and not a combined fork/spawn
we need to destroy ourselves since our child should have
replaced us. */
if (flags & _EXEC_EXECONLY)
{
/* if not an exos format, should not expect normal child behaviors, so we
* just quit from procd to avoid any hanging...
*/
if (exec_format == EXEC_SIMPLE)
proc_exit(0);
/* we die anyways, so free quantum and env */
ProcessFreeQuanta(__envid);
sys_env_free (0, __envid);
}
if (old_argv != argv) __free((char**)argv);
OSCALLEXIT(OSCALL_execve);
return (NewPid);
err_env_free:
ProcessFreeQuanta(__envid);
sys_env_free (k, envid);
err:
if (old_argv != argv) __free((char**)argv);
errno = -r;
OSCALLEXIT(OSCALL_execve);
return -1;
}
/* could implement tsleep in terms of following tsleep_pred */
int tsleep (void *chan, int pri, char *wmesg, int ticks) {
#define PREDSZ 32
struct wk_term t[PREDSZ];
int sz = 0;
int sig = 0;
int catch = pri & PCATCH;
void **wchan;
int ret, i, CriticalLevels;
unsigned long long dest_ticks = ticks;
retry:
sz = 0;
d0printf("%d tsleep chan: %p, catch: %d, ticks: %d (lbolt? %d)\n",
getpid(),chan, catch ?1:0, ticks, chan == &lbolt);
global_ftable->counter0++;
if (chan == &lbolt) global_ftable->counter2++;
wchan = &synch_table->wchan[envidx(__envid)];
*wchan = chan;
/* for timeout */
if (dest_ticks) {
dest_ticks += __sysinfo.si_system_ticks;
sz += wk_mksleep_pred(t, dest_ticks); /* t is fine since it is first */
sz = wk_mkop(sz, t, WK_OR);
}
/* for channel */
if (chan != &lbolt) {
sz = wk_mkvar (sz, t, wk_phys (wchan), 0);
sz = wk_mkimm (sz, t, 0);
sz = wk_mkop (sz, t, WK_EQ);
} else {
/* sleep for 0.5 seconds */
sz += wk_mksleep_pred(&t[sz],(500000/__sysinfo.si_rate) +
__sysinfo.si_system_ticks);
}
/* for signals */
if (catch) {
//kprintf("%d tsleep interruptible (sigready? %d)\n",getpid(),__issigready());
if ((sig = __issigready())) goto resume;
sz = wk_mkop(sz, t, WK_OR);
sz += wk_mksig_pred(&t[sz]);
}
assert(sz <= PREDSZ);
/* make sure when sleeping on lbolt => no ticks */
assert(!(chan == &lbolt && dest_ticks != 0));
/* Leave and then Enter Critical Region */
i = CriticalLevels = CriticalNesting(); assert(i >= 0);
while (i-- > 0) ExitCritical(); assert(CriticalNesting() == 0);
wk_waitfor_pred (t, sz);
i = 0; while (i++ < CriticalLevels) EnterCritical();
assert(CriticalLevels == CriticalNesting());
resume:
ret = 0;
if (catch && (sig != 0 || (sig = __issigready()))) {
/* there is a signal ready */
//kprintf("%d tsleep interrupted by a signal: %d (%s)\n",getpid(),sig,sys_signame[sig]);
if (__issigstopping(sig)) {
__signal_stop_process(sig);
goto retry;
}
if (__issigrestart(sig)) ret = ERESTART;
else ret = EINTR;
goto done;
}
if (chan != &lbolt && dest_ticks && __sysinfo.si_system_ticks > dest_ticks) {
ret = EWOULDBLOCK;
}
done:
d0printf("%d tsleep ret: %d chan: %p, catch: %d, dest_ticks: %qu (lbolt? %d) -> %d\n",
getpid(),ret,chan, catch ?1:0, dest_ticks, chan == &lbolt, ret);
/* clear waiting channel */
*wchan = 0;
return ret;
}
