From: John Hodge <tpg@portege.thepowersgang.com>
Date: Sun, 27 Sep 2009 03:16:20 +0000 (+0800)
Subject: Fixed stack changing in SYS_CLONE
X-Git-Tag: rel0.06~473
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;ds=sidebyside;h=3f47fd7edcc581911a23ca075a463c5c8de9ab9a;p=tpg%2Facess2.git

Fixed stack changing in SYS_CLONE
---

diff --git a/Kernel/syscalls.c b/Kernel/syscalls.c
index e6d8ed39..492c33e3 100644
--- a/Kernel/syscalls.c
+++ b/Kernel/syscalls.c
@@ -58,7 +58,7 @@ void SyscallHandler(tSyscallRegs *Regs)
 		// Call clone system call
 		ret = Proc_Clone(&err, Regs->Arg1);
 		// Change user stack if requested
-		if(ret == 0 && Regs->Arg2)
+		if(ret == 0 && !(Regs->Arg2 & CLONE_VM))
 			Regs->StackPointer = Regs->Arg2;
 		break;
 	
diff --git a/Usermode/Applications/init_src/main.c b/Usermode/Applications/init_src/main.c
index 55c48012..b205e3b3 100644
--- a/Usermode/Applications/init_src/main.c
+++ b/Usermode/Applications/init_src/main.c
@@ -22,14 +22,13 @@ int main(int argc, char *argv[])
 	write(1, 13, "Hello, World!");
 	
 	tid = clone(CLONE_VM, 0);
+	__asm__ __volatile__("xchg %%bx, %%bx"::"a"(tid));
 	if(tid == 0)
 	{
 		execve(DEFAULT_SHELL, NULL, NULL);
 		for(;;) __asm__ __volatile__("hlt");
 	}
 	
-	__asm__ __volatile__("xchg %%bx, %%bx"::"a"(tid));
-	
 	for(;;)	sleep();
 	
 	return 42;