void umain(int argc, char **argv) { sys_env_set_priority(0, PRIORITY_SUPER); int i; int n = 3; for (i = 0; i < n; i++) { cprintf("[%08x] Super Priority Process is Running\n", sys_getenvid()); } return; }
// Dispatches to the correct kernel function, passing the arguments. int32_t syscall(uint32_t syscallno, uint32_t a1, uint32_t a2, uint32_t a3, uint32_t a4, uint32_t a5) { // Call the function corresponding to the 'syscallno' parameter. // Return any appropriate return value. // LAB 3: Your code here. switch (syscallno){ case SYS_getenvid: return sys_getenvid(); case SYS_cputs: sys_cputs((const char*)a1, a2); return 0; case SYS_cgetc: return sys_cgetc(); case SYS_env_destroy: return sys_env_destroy(a1); case SYS_map_kernel_page: return sys_map_kernel_page((void*)a1, (void*)a2); case SYS_sbrk: return sys_sbrk(a1); case SYS_yield: sys_yield(); return 0; case SYS_exofork: return sys_exofork(); case SYS_env_set_status: return sys_env_set_status((envid_t)a1, (int)a2); case SYS_page_alloc: return sys_page_alloc((envid_t)a1, (void *)a2, (int)a3); case SYS_page_map: return sys_page_map((envid_t)*((uint32_t*)a1), (void*)*((uint32_t*)a1+1), (envid_t)*((uint32_t*)a1+2), (void*)*((uint32_t*)a1+3), (int)*((uint32_t*)a1+4)); case SYS_page_unmap: return sys_page_unmap((envid_t)a1, (void*)a2); case SYS_env_set_priority: return sys_env_set_priority((envid_t)a1, (int) a2); case SYS_env_set_pgfault_upcall: return sys_env_set_pgfault_upcall((envid_t)a1, (void*)a2); case SYS_ipc_recv: return sys_ipc_recv((void*)a1); case SYS_ipc_try_send: return sys_ipc_try_send((envid_t)a1, a2, (void*)a3, (int)a4); default: return -E_INVAL; } }