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clone() call working. Tested exit(), clone() and fork() mixture running about 22 threads, processes.

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This commit is contained in:
Bahadir Balban
2008-11-10 17:58:33 +02:00
parent 66388a0fc3
commit 44c34026b2
8 changed files with 68 additions and 52 deletions
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1
tasks/mm0/include/syscalls.h
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@@ -32,6 +32,7 @@ int sys_shmdt(struct tcb *requester, const void *shmaddr);
int sys_shmget(key_t key, int size, int shmflg);
int sys_fork(struct tcb *parent);
int sys_clone(struct tcb *parent, void *child_stack, unsigned int clone_flags);
void sys_exit(struct tcb *task, int status);
#endif /* __MM0_SYSARGS_H__ */

4
tasks/mm0/main.c
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@@ -126,6 +126,10 @@ void handle_requests(void)
ret = sys_fork(sender);
break;
}
case L4_IPC_TAG_CLONE: {
ret = sys_clone(sender, (void *)mr[0], (unsigned int)mr[1]);
break;
}
case L4_IPC_TAG_EXIT: {
/* An exiting task has no receive phase */
sys_exit(sender, (int)mr[0]);

6
tasks/mm0/src/clone.c
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@@ -122,10 +122,14 @@ int do_clone(struct tcb *parent, unsigned long child_stack, unsigned int flags)
child->stack_end = child_stack;
child->stack_start = 0;
/* Set child's stack pointer */
memset(&exregs, 0, sizeof(exregs));
/* Set child's stack pointer */
exregs_set_stack(&exregs, child_stack);
/* Set child's clone return value to 0 */
exregs_set_mr(&exregs, MR_RETURN, 0);
/* Do the actual exregs call to c0 */
if ((err = l4_exchange_registers(&exregs, child->tid)) < 0)
BUG();

8
tasks/mm0/src/task.c
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@@ -61,13 +61,9 @@ struct tcb *find_task(int tid)
{
struct tcb *t;
list_for_each_entry(t, &global_tasks.list, list) {
/* A temporary precaution */
BUG_ON(t->tid != t->spid);
if (t->tid == tid) {
list_for_each_entry(t, &global_tasks.list, list)
if (t->tid == tid)
return t;
}
}
return 0;
}