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Ignore whitespace Rev 4152 → Rev 4153

/branches/network/uspace/srv/loader/main.c
27,12 → 27,12
*/
 
/** @addtogroup loader
* @brief Loads and runs programs from VFS.
* @brief Loads and runs programs from VFS.
* @{
*/
*/
/**
* @file
* @brief Loads and runs programs from VFS.
* @brief Loads and runs programs from VFS.
*
* The program loader is a special init binary. Its image is used
* to create a new task upon a @c task_spawn syscall. The syscall
46,9 → 46,11
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <bool.h>
#include <fcntl.h>
#include <sys/types.h>
#include <ipc/ipc.h>
#include <ipc/services.h>
#include <ipc/loader.h>
#include <loader/pcb.h>
#include <errno.h>
58,11 → 60,7
#include <elf.h>
#include <elf_load.h>
 
/**
* Bias used for loading the dynamic linker. This will be soon replaced
* by automatic placement.
*/
#define RTLD_BIAS 0x80000
#define DPRINTF(...)
 
/** Pathname of the file that will be loaded */
static char *pathname = NULL;
77,6 → 75,36
/** Buffer holding all arguments */
static char *arg_buf = NULL;
 
static elf_info_t prog_info;
static elf_info_t interp_info;
 
static bool is_dyn_linked;
 
/** Used to limit number of connections to one. */
static bool connected;
 
static void loader_get_taskid(ipc_callid_t rid, ipc_call_t *request)
{
ipc_callid_t callid;
task_id_t task_id;
size_t len;
task_id = task_get_id();
if (!ipc_data_read_receive(&callid, &len)) {
ipc_answer_0(callid, EINVAL);
ipc_answer_0(rid, EINVAL);
return;
}
if (len > sizeof(task_id))
len = sizeof(task_id);
ipc_data_read_finalize(callid, &task_id, len);
ipc_answer_0(rid, EOK);
}
 
 
/** Receive a call setting pathname of the program to execute.
*
* @param rid
87,13 → 115,13
ipc_callid_t callid;
size_t len;
char *name_buf;
 
if (!ipc_data_write_receive(&callid, &len)) {
ipc_answer_0(callid, EINVAL);
ipc_answer_0(rid, EINVAL);
return;
}
 
name_buf = malloc(len + 1);
if (!name_buf) {
ipc_answer_0(callid, ENOMEM);
100,15 → 128,15
ipc_answer_0(rid, ENOMEM);
return;
}
 
ipc_data_write_finalize(callid, name_buf, len);
ipc_answer_0(rid, EOK);
 
if (pathname != NULL) {
free(pathname);
pathname = NULL;
}
 
name_buf[len] = '\0';
pathname = name_buf;
}
124,23 → 152,23
size_t buf_len, arg_len;
char *p;
int n;
 
if (!ipc_data_write_receive(&callid, &buf_len)) {
ipc_answer_0(callid, EINVAL);
ipc_answer_0(rid, EINVAL);
return;
}
 
if (arg_buf != NULL) {
free(arg_buf);
arg_buf = NULL;
}
 
if (argv != NULL) {
free(argv);
argv = NULL;
}
 
arg_buf = malloc(buf_len + 1);
if (!arg_buf) {
ipc_answer_0(callid, ENOMEM);
147,12 → 175,12
ipc_answer_0(rid, ENOMEM);
return;
}
 
ipc_data_write_finalize(callid, arg_buf, buf_len);
ipc_answer_0(rid, EOK);
 
arg_buf[buf_len] = '\0';
 
/*
* Count number of arguments
*/
163,10 → 191,10
p = p + arg_len + 1;
++n;
}
 
/* Allocate argv */
argv = malloc((n + 1) * sizeof(char *));
 
if (argv == NULL) {
free(arg_buf);
ipc_answer_0(callid, ENOMEM);
173,7 → 201,7
ipc_answer_0(rid, ENOMEM);
return;
}
 
/*
* Fill argv with argument pointers
*/
181,78 → 209,91
n = 0;
while (p < arg_buf + buf_len) {
argv[n] = p;
 
arg_len = strlen(p);
p = p + arg_len + 1;
++n;
}
 
argc = n;
argv[n] = NULL;
}
 
 
/** Load and run the previously selected program.
/** Load the previously selected program.
*
* @param rid
* @param request
* @return 0 on success, !0 on error.
*/
static int loader_run(ipc_callid_t rid, ipc_call_t *request)
static int loader_load(ipc_callid_t rid, ipc_call_t *request)
{
int rc;
 
elf_info_t prog_info;
elf_info_t interp_info;
 
// printf("Load program '%s'\n", pathname);
 
rc = elf_load_file(pathname, 0, &prog_info);
if (rc < 0) {
printf("failed to load program\n");
DPRINTF("Failed to load executable '%s'.\n", pathname);
ipc_answer_0(rid, EINVAL);
return 1;
}
 
// printf("Create PCB\n");
elf_create_pcb(&prog_info, &pcb);
 
pcb.argc = argc;
pcb.argv = argv;
 
if (prog_info.interp == NULL) {
/* Statically linked program */
// printf("Run statically linked program\n");
// printf("entry point: 0x%llx\n", prog_info.entry);
is_dyn_linked = false;
ipc_answer_0(rid, EOK);
close_console();
elf_run(&prog_info, &pcb);
return 0;
}
 
printf("Load dynamic linker '%s'\n", prog_info.interp);
rc = elf_load_file("/rtld.so", RTLD_BIAS, &interp_info);
rc = elf_load_file(prog_info.interp, 0, &interp_info);
if (rc < 0) {
printf("failed to load dynamic linker\n");
DPRINTF("Failed to load interpreter '%s.'\n",
prog_info.interp);
ipc_answer_0(rid, EINVAL);
return 1;
}
is_dyn_linked = true;
ipc_answer_0(rid, EOK);
return 0;
}
 
/*
* Provide dynamic linker with some useful data
*/
pcb.rtld_dynamic = interp_info.dynamic;
pcb.rtld_bias = RTLD_BIAS;
 
printf("run dynamic linker\n");
printf("entry point: 0x%llx\n", interp_info.entry);
close_console();
/** Run the previously loaded program.
*
* @param rid
* @param request
* @return 0 on success, !0 on error.
*/
static void loader_run(ipc_callid_t rid, ipc_call_t *request)
{
const char *cp;
/* Set the task name. */
cp = strrchr(pathname, '/');
cp = (cp == NULL) ? pathname : (cp + 1);
task_set_name(cp);
if (is_dyn_linked == true) {
/* Dynamically linked program */
DPRINTF("Run ELF interpreter.\n");
DPRINTF("Entry point: 0x%lx\n", interp_info.entry);
close_console();
ipc_answer_0(rid, EOK);
elf_run(&interp_info, &pcb);
} else {
/* Statically linked program */
close_console();
ipc_answer_0(rid, EOK);
elf_run(&prog_info, &pcb);
}
 
ipc_answer_0(rid, EOK);
elf_run(&interp_info, &pcb);
 
/* Not reached */
return 0;
}
 
/** Handle loader connection.
265,24 → 306,43
ipc_callid_t callid;
ipc_call_t call;
int retval;
 
/* Already have a connection? */
if (connected) {
ipc_answer_0(iid, ELIMIT);
return;
}
connected = true;
/* Accept the connection */
ipc_answer_0(iid, EOK);
/* Ignore parameters, the connection is already open */
(void)iid; (void)icall;
 
(void) iid;
(void) icall;
while (1) {
callid = async_get_call(&call);
// printf("received call from phone %d, method=%d\n",
// call.in_phone_hash, IPC_GET_METHOD(call));
switch (IPC_GET_METHOD(call)) {
case IPC_M_PHONE_HUNGUP:
exit(0);
case LOADER_GET_TASKID:
loader_get_taskid(callid, &call);
continue;
case LOADER_SET_PATHNAME:
loader_set_pathname(callid, &call);
continue;
case LOADER_SET_ARGS:
loader_set_args(callid, &call);
continue;
case LOADER_LOAD:
loader_load(callid, &call);
continue;
case LOADER_RUN:
loader_run(callid, &call);
exit(0);
continue;
/* Not reached */
default:
retval = ENOENT;
break;
289,7 → 349,7
}
if ((callid & IPC_CALLID_NOTIFICATION) == 0 &&
IPC_GET_METHOD(call) != IPC_M_PHONE_HUNGUP) {
printf("responding EINVAL to method %d\n",
DPRINTF("Responding EINVAL to method %d.\n",
IPC_GET_METHOD(call));
ipc_answer_0(callid, EINVAL);
}
300,31 → 360,20
*/
int main(int argc, char *argv[])
{
ipc_callid_t callid;
ipc_call_t call;
ipcarg_t phone_hash;
 
/* The first call only communicates the incoming phone hash */
callid = ipc_wait_for_call(&call);
 
if (IPC_GET_METHOD(call) != LOADER_HELLO) {
if (IPC_GET_METHOD(call) != IPC_M_PHONE_HUNGUP)
ipc_answer_0(callid, EINVAL);
return 1;
}
 
ipc_answer_0(callid, EOK);
phone_hash = call.in_phone_hash;
 
/*
* Up until now async must not be used as it couldn't
* handle incoming requests. (Which means e.g. printf()
* cannot be used)
*/
async_new_connection(phone_hash, 0, NULL, loader_connection);
ipcarg_t phonead;
connected = false;
/* Set a handler of incomming connections. */
async_set_client_connection(loader_connection);
/* Register at naming service. */
if (ipc_connect_to_me(PHONE_NS, SERVICE_LOAD, 0, 0, &phonead) != 0)
return -1;
async_manager();
 
/* not reached */
/* Never reached */
return 0;
}