Stack alignment issues...

Author: maxdev1

kernel/src/kernel/tasking/elf/elf_tls.cpp

@@ -94,5 +94,5 @@ void elfTlsCreateMasterImage(g_fd file, g_process* process, g_elf_object* rootOb
 	process->tlsMaster.location = tlsStart;
 	process->tlsMaster.size = size;
 	process->tlsMaster.userThreadOffset = rootObject->tlsMaster.userThreadOffset;
-	logInfo("%!   created TLS master: %h, size: %h, uTO: %x", "elf", process->tlsMaster.location, process->tlsMaster.size, process->tlsMaster.userThreadOffset);
+	logDebug("%!   created TLS master: %h, size: %h, uTO: %x", "elf", process->tlsMaster.location, process->tlsMaster.size, process->tlsMaster.userThreadOffset);
 }

kernel/src/kernel/tasking/tasking_state.cpp

@@ -25,16 +25,19 @@
 void taskingStateReset(g_task* task, g_address rip, g_security_level entryLevel)
 {
 	g_processor_state* state;
-	if(entryLevel == G_SECURITY_LEVEL_KERNEL && task->securityLevel > G_SECURITY_LEVEL_KERNEL)
+	if(task->securityLevel > G_SECURITY_LEVEL_KERNEL)
 		state = (g_processor_state*) (task->interruptStack.end - sizeof(g_processor_state));
 	else
 		state = (g_processor_state*) (task->stack.end - sizeof(g_processor_state));
-
 	task->state = state;
 
 	memorySetBytes((void*) task->state, 0, sizeof(g_processor_state));
 	state->rflags = 0x20202;
-	state->rsp = (g_virtual_address) task->state;
+
+	if(entryLevel > G_SECURITY_LEVEL_KERNEL)
+		state->rsp = task->stack.end - 0x8; // TODO Find out why BOTH this and alignment in crt0 is required
+	else
+		state->rsp = (g_virtual_address) task->state;
 
 	if(entryLevel == G_SECURITY_LEVEL_KERNEL)
 	{

libc/crt/x86_64/crt0.S

@@ -27,14 +27,8 @@
 
 # The <_start> function is where the kernel starts the execution.
 _start:
-    mov %rsp, %rax
-    and $0xf, %rax
-    jz _skipAlignment
-
-    sub %rax, %rsp
-    add $16, %rsp
-
-_skipAlignment:
+    xorq %rbp, %rbp
+    andq $-16, %rsp
     call __g_main
 
 # Endless loop, for the case that bad things happen