46 lines
840 B
C
46 lines
840 B
C
|
#include <inc/x86.h>
|
||
|
|
#include <inc/lib.h>
|
||
|
|
|
||
|
|
#define VA ((char *) 0xA0000000)
|
||
|
|
const char *msg = "hello, world\n";
|
||
|
|
const char *msg2 = "goodbye, world\n";
|
||
|
|
|
||
|
|
void childofspawn(void);
|
||
|
|
|
||
|
|
void
|
||
|
|
umain(int argc, char **argv)
|
||
|
|
{
|
||
|
|
int r;
|
||
|
|
|
||
|
|
if (argc != 0)
|
||
|
|
childofspawn();
|
||
|
|
|
||
|
|
if ((r = sys_page_alloc(0, VA, PTE_P|PTE_W|PTE_U|PTE_SHARE)) < 0)
|
||
|
|
panic("sys_page_alloc: %e", r);
|
||
|
|
|
||
|
|
// check fork
|
||
|
|
if ((r = fork()) < 0)
|
||
|
|
panic("fork: %e", r);
|
||
|
|
if (r == 0) {
|
||
|
|
strcpy(VA, msg);
|
||
|
|
exit();
|
||
|
|
}
|
||
|
|
wait(r);
|
||
|
|
cprintf("fork handles PTE_SHARE %s\n", strcmp(VA, msg) == 0 ? "right" : "wrong");
|
||
|
|
|
||
|
|
// check spawn
|
||
|
|
if ((r = spawnl("/testpteshare", "testpteshare", "arg", 0)) < 0)
|
||
|
|
panic("spawn: %e", r);
|
||
|
|
wait(r);
|
||
|
|
cprintf("spawn handles PTE_SHARE %s\n", strcmp(VA, msg2) == 0 ? "right" : "wrong");
|
||
|
|
|
||
|
|
breakpoint();
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
childofspawn(void)
|
||
|
|
{
|
||
|
|
strcpy(VA, msg2);
|
||
|
|
exit();
|
||
|
|
}
|