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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "native_client/src/include/portability.h"
#if NACL_OSX
#include <crt_externs.h>
#endif
#ifdef _WIN64 /* TODO(gregoryd): remove this when win64 issues are fixed */
#define NACL_NO_INLINE
#endif
EXTERN_C_BEGIN
#include "native_client/src/shared/platform/nacl_sync.h"
#include "native_client/src/shared/platform/nacl_sync_checked.h"
#include "native_client/src/trusted/service_runtime/nacl_globals.h"
#include "native_client/src/trusted/service_runtime/expiration.h"
#include "native_client/src/trusted/service_runtime/nacl_app.h"
#include "native_client/src/trusted/service_runtime/nacl_all_modules.h"
#include "native_client/src/trusted/service_runtime/sel_ldr.h"
#include "native_client/src/trusted/platform_qualify/nacl_os_qualify.h"
EXTERN_C_END
int verbosity = 0;
#ifdef __GNUC__
/*
* GDB's canonical overlay managment routine.
* We need its symbol in the symbol table so don't inline it.
* TODO(dje): add some explanation for the non-GDB person.
*/
static void __attribute__ ((noinline)) _ovly_debug_event (void) {
/*
* The asm volatile is here as instructed by the GCC docs.
* It's not enough to declare a function noinline.
* GCC will still look inside the function to see if it's worth calling.
*/
asm volatile ("");
}
#endif
static void StopForDebuggerInit(const struct NaClApp *state) {
/* Put xlate_base in a place where gdb can find it. */
nacl_global_xlate_base = state->mem_start;
#ifdef __GNUC__
_ovly_debug_event();
#endif
}
int SelMain(const int desc, const NaClHandle handle) {
#ifdef _WIN64
/* TODO(gregoryd): remove this when NaCl's service_runtime supports Win64 */
return 0;
#else
char *av[1];
int ac = 1;
char **envp;
struct NaClApp state;
char *nacl_file = 0;
int main_thread_only = 1;
int export_addr_to = -2;
struct NaClApp *nap;
NaClErrorCode errcode;
int ret_code = 1;
#if NACL_OSX
// Mac dynamic libraries cannot access the environ variable directly.
envp = *_NSGetEnviron();
#else
extern char **environ;
envp = environ;
#endif
NaClAllModulesInit();
/* used to be -P */
NaClSrpcFileDescriptor = desc;
/* used to be -X */
export_addr_to = desc;
/* to be passed to NaClMain, eventually... */
av[0] = const_cast<char*>("NaClMain");
if (!NaClAppCtor(&state)) {
fprintf(stderr, "Error while constructing app state\n");
goto done_file_dtor;
}
state.restrict_to_main_thread = main_thread_only;
nap = &state;
errcode = LOAD_OK;
/* import IMC handle - used to be "-i" */
NaClAddImcHandle(nap, handle, desc);
/*
* in order to report load error to the browser plugin through the
* secure command channel, we do not immediate jump to cleanup code
* on error. rather, we continue processing (assuming earlier
* errors do not make it inappropriate) until the secure command
* channel is set up, and then bail out.
*/
/*
* Ensure this operating system platform is supported.
*/
if (!NaClOsIsSupported()) {
errcode = LOAD_UNSUPPORTED_OS_PLATFORM;
nap->module_load_status = errcode;
fprintf(stderr, "Error while loading \"%s\": %s\n",
nacl_file,
NaClErrorString(errcode));
}
/* Give debuggers a well known point at which xlate_base is known. */
StopForDebuggerInit(&state);
/*
* If export_addr_to is set to a non-negative integer, we create a
* bound socket and socket address pair and bind the former to
* descriptor 3 and the latter to descriptor 4. The socket address
* is written out to the export_addr_to descriptor.
*
* The service runtime also accepts a connection on the bound socket
* and spawns a secure command channel thread to service it.
*
* If export_addr_to is -1, we only create the bound socket and
* socket address pair, and we do not export to an IMC socket. This
* use case is typically only used in testing, where we only "dump"
* the socket address to stdout or similar channel.
*/
if (-2 < export_addr_to) {
NaClCreateServiceSocket(nap);
if (0 <= export_addr_to) {
NaClSendServiceAddressTo(nap, export_addr_to);
/*
* NB: spawns a thread that uses the command channel. we do
* this after NaClAppLoadFile so that NaClApp object is more
* fully populated. Hereafter any changes to nap should be done
* while holding locks.
*/
NaClSecureCommandChannel(nap);
}
}
NaClXMutexLock(&nap->mu);
nap->module_load_status = LOAD_OK;
NaClXCondVarBroadcast(&nap->cv);
NaClXMutexUnlock(&nap->mu);
if (NULL != nap->secure_channel) {
/*
* wait for start_module RPC call on secure channel thread.
*/
NaClWaitForModuleStartStatusCall(nap);
}
/*
* error reporting done; can quit now if there was an error earlier.
*/
if (LOAD_OK != errcode) {
goto done;
}
/*
* only nap->ehdrs.e_entry is usable, no symbol table is
* available.
*/
if (!NaClCreateMainThread(nap,
ac,
av,
envp)) {
fprintf(stderr, "creating main thread failed\n");
goto done;
}
ret_code = NaClWaitForMainThreadToExit(nap);
/*
* exit_group or equiv kills any still running threads while module
* addr space is still valid. otherwise we'd have to kill threads
* before we clean up the address space.
*/
return ret_code;
done:
fflush(stdout);
NaClAppDtor(&state);
done_file_dtor:
fflush(stdout);
NaClAllModulesFini();
return ret_code;
#endif
}
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