LibC: Cleanup and fix missing LibC headers

userspace/libraries/LibC/include/dlfcn.h

@@ -12,6 +12,9 @@ __BEGIN_DECLS
 #define RTLD_GLOBAL	3
 #define RTLD_LOCAL	4
 
+#define RTLD_NEXT    ((void*)-1)
+#define RTLD_DEFAULT ((void*) 0)
+
 int		dlclose(void* handle);
 char*	dlerror(void);
 void*	dlopen(const char* file, int mode);

userspace/libraries/LibC/include/pthread.h

@@ -52,11 +52,9 @@ __BEGIN_DECLS
 #define PTHREAD_SCOPE_PROCESS			23
 #define PTHREAD_SCOPE_SYSTEM			24
 
-#if 0
-#define PTHREAD_COND_INITIALIZER
-#define PTHREAD_MUTEX_INITIALIZER
-#define PTHREAD_RWLOCK_INITIALIZER
-#endif
+#define PTHREAD_COND_INITIALIZER   (pthread_cond_t)0
+#define PTHREAD_MUTEX_INITIALIZER  (pthread_mutex_t)0
+#define PTHREAD_RWLOCK_INITIALIZER (pthread_rwlock_t)0
 
 int			pthread_atfork(void (*prepare)(void), void (*parent)(void), void(*child)(void));
 int			pthread_attr_destroy(pthread_attr_t* attr);

userspace/libraries/LibC/include/signal.h

@@ -46,16 +46,43 @@ struct sigevent
 #define SIGABRT   1
 #define SIGALRM   2
 #define SIGBUS    3
+#define     BUS_ADRALN 1
+#define     BUS_ADRERR 2
+#define     BUS_OBJERR 3
 #define SIGCHLD   4
+#define     CLD_EXITED    1
+#define     CLD_KILLED    2
+#define     CLD_DUMPED    3
+#define     CLD_TRAPPED   4
+#define     CLD_STOPPED   5
+#define     CLD_CONTINUED 6
 #define SIGCONT   5
 #define SIGFPE    6
+#define     FPE_INTDIV 1
+#define     FPE_INTOVF 2
+#define     FPE_FLTDIV 3
+#define     FPE_FLTOVF 4
+#define     FPE_FLTUND 5
+#define     FPE_FLTRES 6
+#define     FPE_FLTINV 7
+#define     FPE_FLTSUB 8
 #define SIGHUP    7
 #define SIGILL    8
+#define     ILL_ILLOPC 1
+#define     ILL_ILLOPN 2
+#define     ILL_ILLADR 3
+#define     ILL_ILLTRP 4
+#define     ILL_PRVOPC 5
+#define     ILL_PRVREG 6
+#define     ILL_COPROC 7
+#define     ILL_BADSTK 8
 #define SIGINT    9
 #define SIGKILL   10
 #define SIGPIPE   11
 #define SIGQUIT   12
 #define SIGSEGV   13
+#define     SEGV_MAPERR 1
+#define     SEGV_ACCERR 2
 #define SIGSTOP   14
 #define SIGTERM   15
 #define SIGTSTP   16
@@ -64,6 +91,12 @@ struct sigevent
 #define SIGUSR1   19
 #define SIGUSR2   20
 #define SIGPOLL   21
+#define     POLL_IN  1
+#define     POLL_OUT 2
+#define     POLL_MSG 3
+#define     POLL_ERR 4
+#define     POLL_PRI 5
+#define     POLL_HUP 6
 #define SIGPROF   22
 #define SIGSYS    23
 #define SIGTRAP   24
@@ -75,6 +108,12 @@ struct sigevent
 #define SIGRTMIN  30
 #define SIGRTMAX  (SIGRTMIN+32)
 
+#define SI_USER    10
+#define SI_QUEUE   11
+#define SI_TIMER   12
+#define SI_ASYNCIO 13
+#define SI_MESGQ   14
+
 #define _SIGMIN SIGABRT
 #define _SIGMAX SIGRTMAX
 
@@ -101,7 +140,46 @@ typedef struct
 	int    ss_flags; /* Flags. */
 } stack_t;
 
-typedef struct {} mcontext_t;
+enum
+{
+#if defined(__x86_64__)
+	REG_RAX,
+	REG_RBX,
+	REG_RCX,
+	REG_RDX,
+	REG_RDI,
+	REG_RSI,
+	REG_RSP,
+	REG_RBP,
+	REG_RIP,
+	REG_R8,
+	REG_R9,
+	REG_R10,
+	REG_R11,
+	REG_R12,
+	REG_R13,
+	REG_R14,
+	REG_R15,
+#elif defined(__i686__)
+	REG_EAX,
+	REG_EBX,
+	REG_ECX,
+	REG_EDX,
+	REG_EDI,
+	REG_ESI,
+	REG_ESP,
+	REG_EBP,
+	REG_EIP,
+#else
+#error
+#endif
+	__REG_COUNT
+};
+
+typedef struct
+{
+	long gregs[__REG_COUNT];
+} mcontext_t;
 
 typedef struct __ucontext_t
 {
@@ -132,11 +210,6 @@ struct sigaction
 	void (*sa_sigaction)(int, siginfo_t*, void*); /* Pointer to a signal-catching function. */
 };
 
-// TODO: The <signal.h> header shall define the symbolic constants in the
-//       Code column of the following table for use as values of si_code
-//       that are signal-specific or non-signal-specific reasons why the
-//       signal was generated.
-
 int		kill(pid_t pid, int sig);
 int		killpg(pid_t pgpr, int sig);
 void	psiginfo(const siginfo_t* pinfo, const char* message);

userspace/libraries/LibC/include/sys/types.h

@@ -149,15 +149,7 @@ __BEGIN_DECLS
 
 #if !defined(__ssize_t_defined) && (defined(__need_all_types) || defined(__need_ssize_t))
 	#define __ssize_t_defined 1
-	#if __SIZEOF_SIZE_T__ == __SIZEOF_INT__
-		typedef int ssize_t;
-	#elif __SIZEOF_SIZE_T__ == __SIZEOF_LONG__
-		typedef long ssize_t;
-	#elif __SIZEOF_SIZE_T__ == __SIZEOF_LONG_LONG__
-		typedef long long ssize_t;
-	#else
-		#error "unsupported sizeof(size_t)"
-	#endif
+	typedef __PTRDIFF_TYPE__ ssize_t;
 #endif
 #undef __need_ssize_t