apps/Makefile

@@ -11,6 +11,7 @@ CFLAGS := -Wall -Wextra -Werror -Os
 $(APPS_BIN)/%: $(APPS_SRC)/%.c
 	@mkdir -p $(@D)
 	$(CC) $(CFLAGS) -o $@ $^
+	$(STRIP) $@
 
 build: $(REAL_APPS)
 

apps/src/init.c

@@ -141,13 +141,9 @@ int main()
 
     fclose(new_stderr);
 
-    pid_t child = fork();
-    if (child == 0)
-    {
-        msleep(500);
-        printf("I am the child, who is my parent?\n");
-    }
-    else { printf("My child is %ld!", child); }
+    execv("/bin/sym", NULL);
 
-    return 0;
+    perror("execv"); // If we're here, execv failed
+
+    return 1;
 }

kernel/src/sys/exec.cpp

@@ -32,23 +32,16 @@ void sys_fork(Context* context) // FIXME: Even though both processes's address s
 
     size_t stack_bytes = get_top_of_stack(parent->allocated_stack, TASK_PAGES_IN_STACK) - parent->regs.rsp;
 
-    child->regs.rsp = get_top_of_stack(child->allocated_stack, TASK_PAGES_IN_STACK) - stack_bytes;
+    child->regs.rsp -= stack_bytes;
 
     memcpy((void*)child->regs.rsp, (void*)parent->regs.rsp, stack_bytes);
 
-    child->regs.rsp += sizeof(uintptr_t) * 2; // I don't know why this is...
-
     child->address_space = parent->address_space.clone();
 
     child->regs.rax = 0;
     context->rax = child->id;
 
-    child->state = child->Running;
-
-    kinfoln("fork(): parent RIP %lx, child RIP %lx, parent RSP %lx, child RSP %lx", parent->regs.rip, child->regs.rip,
-            parent->regs.rsp, child->regs.rsp);
-
-    kinfoln("fork(): forked parent %ld into child %ld", parent->id, child->id);
+    kinfoln("fork(): forked parent %d into child %d", parent->id, child->id);
 
     return;
 }

kernel/src/trace/StackTracer.cpp

@@ -1,6 +1,5 @@
 #include "trace/StackTracer.h"
 #include "memory/Memory.h"
-#include "memory/VMM.h"
 #include "std/stdio.h"
 #include "trace/Resolve.h"
 
@@ -21,11 +20,6 @@ typedef struct stackframe
 
 void StackTracer::trace()
 {
-    if (!VMM::is_using_kernel_address_space())
-    {
-        VMM::switch_back_to_kernel_address_space();
-        VMM::apply_address_space();
-    }
     stackframe* frame = (stackframe*)m_base_pointer;
     while (frame && frame->instruction)
     {
@@ -33,7 +27,6 @@ void StackTracer::trace()
         get_symbol_name(frame->instruction, symbol_name, sizeof(symbol_name));
         printf("%lx: %s\n", frame->instruction, symbol_name);
         frame = frame->next;
-        if (VMM::get_physical((uint64_t)frame) == (uint64_t)-1) return;
     }
 }
 

libs/libc/include/luna/syscall.h

@@ -17,7 +17,6 @@
 #define SYS_fcntl 13
 #define SYS_mprotect 14
 #define SYS_clock 15
-#define SYS_fork 16
 
 #ifndef __want_syscalls
 #ifdef __cplusplus

libs/libc/include/unistd.h

@@ -22,8 +22,7 @@ extern "C"
     int execve(const char*, char* const[], char* const[]);
     /* Not implemented. */
     int execvp(const char*, char* const[]);
-
-    /* Creates an identical copy of the current process and returns its process ID. */
+    /* Not implemented. */
     pid_t fork(void);
 
     /* Terminates the program with the status code status. */

libs/libc/src/unistd.cpp

@@ -19,10 +19,9 @@ extern "C"
     {
         NOT_IMPLEMENTED("execvp");
     }
-
     pid_t fork(void)
     {
-        return syscall(SYS_fork);
+        NOT_IMPLEMENTED("fork");
     }
 
     long syscall(long number, ...)
@@ -35,7 +34,6 @@ extern "C"
         {
         case SYS_clock:
         case SYS_yield:
-        case SYS_fork:
         case SYS_gettid: result = __luna_syscall0(number); break;
         case SYS_exit:
         case SYS_close: