[libc] Change exit status from int to long

Slightly breaking the C standard, but in a way that's unlikely to break
things - allow 64-bit process exit status codes.

src/kernel/objects/process.cpp

@@ -46,7 +46,7 @@ process::create_kernel_process(page_table *pml4)
 }
 
 void
-process::exit(int32_t code)
+process::exit(int64_t code)
 {
     if (m_state == state::exited)
         return;

src/kernel/objects/process.h

@@ -42,7 +42,7 @@ public:
 
     /// Terminate this process.
     /// \arg code   The return code to exit with.
-    void exit(int32_t code);
+    void exit(int64_t code);
 
     /// Get the process' virtual memory space
     vm_space & space() { return m_space; }
@@ -95,7 +95,7 @@ private:
     // This constructor is called by create_kernel_process
     process(page_table *kpml4);
 
-    int32_t m_return_code;
+    int64_t m_return_code;
 
     vm_space m_space;
 

src/kernel/syscalls/process.cpp

@@ -29,10 +29,10 @@ process_kill(process *self)
 }
 
 j6_status_t
-process_exit(int32_t status)
+process_exit(int64_t status)
 {
     process &p = process::current();
-    log::info(logs::task, "Process <%02lx> exiting with code %d", p.obj_id(), status);
+    log::info(logs::task, "Process <%02lx> exiting with code %#lx", p.obj_id(), status);
 
     p.exit(status);
 

src/libraries/libc/include/stdlib.h

@@ -66,10 +66,10 @@ void* pvalloc(size_t);
 _Noreturn void abort( void );
 int atexit( void (*func)(void) );
 int at_quick_exit( void (*func)(void) );
-_Noreturn void exit( int status );
-_Noreturn void _Exit( int status );
+_Noreturn void exit( long status );
+_Noreturn void _Exit( long status );
 char *getenv( const char *name );
-_Noreturn void quick_exit( int status );
+_Noreturn void quick_exit( long status );
 int system( const char *string );
 
 // Searching and sorting utilities

src/libraries/libc/stdlib/exit.cpp

@@ -21,7 +21,7 @@ size_t quick_exit_count = 0;
 atexit_item quick_exit_array[max_atexit];
 
 [[noreturn]] inline void
-exit_with_callbacks(int status, atexit_item *cbs, size_t count)
+exit_with_callbacks(long status, atexit_item *cbs, size_t count)
 {
     for (size_t i = count - 1; i < count; --i) {
         atexit_item &item = cbs[i];
@@ -61,13 +61,13 @@ int at_quick_exit( void (*func)(void) )
 }
 
 void
-exit(int status)
+exit(long status)
 {
     exit_with_callbacks(status, atexit_array, atexit_count);
 }
 
 void
-quick_exit(int status)
+quick_exit(long status)
 {
     exit_with_callbacks(status, quick_exit_array, quick_exit_count);
 }
@@ -75,11 +75,11 @@ quick_exit(int status)
 void
 abort()
 {
-    _Exit(INT32_MIN);
+    _Exit(INT64_MIN);
 }
 
 void
-_Exit( int status )
+_Exit( long status )
 {
     j6_process_exit(status);
 }