Move to new processctl syscall, share common kernel and ulib headers

ulib/Makefile

@@ -11,7 +11,7 @@ SRCFILES := $(call GRABSRC, \
 							system \
 						)
 
-CFLAGS += -isystem $(ROOT)/ulib -isystem $(ROOT)/std/include
+CFLAGS += -isystem $(ROOT)/share/hdrs -isystem $(ROOT)/ulib -isystem $(ROOT)/std/include
 
 ASFILES := $(call GET_ASFILES, $(SRCFILES))
 CFILES := $(call GET_CFILES, $(SRCFILES))

ulib/_start.S

@@ -6,5 +6,7 @@
 _start:
   call _premain
 
-  mov $SYS_QUITPROC, %rax
+  movq $2, %rax      // sys processctl
+  movq $0x5E1F, %rdi // self magic num
+  movq $0, %rsi       // kill cmd
   int $0x80

ulib/syscall/syscall.h

@@ -1,9 +1,6 @@
 #ifndef ULIB_SYSCALL_SYSCALL_H_
 #define ULIB_SYSCALL_SYSCALL_H_
 
-#define SYS_DEBUGPRINT  1
-#define SYS_QUITPROC    2
-
 #if !defined(__ASSEMBLER__)
 
 uint64_t syscall(uint64_t num, uint64_t arg1, uint64_t arg2,

ulib/system/system.c

@@ -1,9 +1,13 @@
 #include <stdint.h>
 #include <system/system.h>
 #include <syscall/syscall.h>
-
+#include <syscall.h>
 
 void sys_debugprint(const char *string) {
   syscall(SYS_DEBUGPRINT, (uint64_t)string, 0, 0, 0, 0, 0);
 }
 
+int32_t sys_processctl(uint64_t pid, uint64_t cmd, void *extra) {
+  return syscall(SYS_PROCESSCTL, pid, cmd, (uint64_t)extra, 0, 0, 0);
+}
+

ulib/system/system.h

@@ -1,6 +1,9 @@
 #ifndef ULIB_SYSTEM_SYSTEM_H_
 #define ULIB_SYSTEM_SYSTEM_H_
 
+#include <stdint.h>
+
 void sys_debugprint(const char *string);
+int32_t sys_processctl(uint64_t pid, uint64_t cmd, void *extra);
 
 #endif // ULIB_SYSTEM_SYSTEM_H_