Merge branch 'master' into x86_64

src/system/kernel/arch/arm/arch_cpu.cpp

@@ -161,6 +161,8 @@ arch_cpu_user_TLB_invalidate(void)
 }
 
 
+// TODO: all functions that use fault handlers need to be implemented
+// in assembly due to problems passing in label addresses in gcc4.
 status_t
 arch_cpu_user_memcpy(void *to, const void *from, size_t size,
 	addr_t *faultHandler)

src/system/kernel/arch/m68k/arch_cpu.cpp

@@ -171,6 +171,8 @@ arch_cpu_user_TLB_invalidate(void)
 }
 
 
+// TODO: all functions that use fault handlers need to be implemented
+// in assembly due to problems passing in label addresses in gcc4.
 status_t
 arch_cpu_user_memcpy(void *to, const void *from, size_t size,
 	addr_t *faultHandler)

src/system/kernel/arch/ppc/arch_cpu.cpp

@@ -172,6 +172,9 @@ arch_cpu_user_TLB_invalidate(void)
 }
 
 
+// TODO: all functions that use fault handlers need to be implemented
+// in assembly due to problems passing in label addresses in gcc4.
+
 status_t
 arch_cpu_user_memcpy(void *to, const void *from, size_t size,
 	addr_t *faultHandler)

src/system/kernel/arch/x86/arch_x86.S

@@ -276,32 +276,37 @@ FUNCTION(arch_cpu_user_strlcpy):
 	/* Copy at most count - 1 bytes */
 	dec		%ecx
 
-	/* move data by bytes */
+	/* If count is now 0, skip straight to null terminating
+	   as our loop will otherwise overflow */
+	jnz		.L_user_strlcpy_copy_begin
+	movb	$0,(%edi)
+	jmp		.L_user_strlcpy_source_count
+
+.L_user_strlcpy_copy_begin:
 	cld
-	repnz
-	movsb
+.L_user_strlcpy_copy_loop:
+	/* move data by bytes */
+	lodsb
+	stosb
+	test %al,%al
+	jz .L_user_strlcpy_source_done
+	loop .L_user_strlcpy_copy_loop
 
 	/* null terminate string */
 	movb	$0,(%edi)
 	dec		%esi
 
-	/* check if we copied the entire source string */
-	cmp		$0,%ecx
-	jne		.L_user_strlcpy_source_done
-
 	/* count remaining bytes in src */
 .L_user_strlcpy_source_count:
 	not		%ecx
-	movb	$0,%al
+	xor		%al,%al
 	repnz
 	scasb
 
 .L_user_strlcpy_source_done:
-
 	movl	%esi,%eax
 	subl	20(%esp),%eax
-	subl	$1,%eax
-
+	dec		%eax
 	/* restore the old fault handler */
 	movl	%ebx,(%edx)