From: Alan Cox <alan@linux.intel.com>
Date: Sun, 9 Sep 2018 23:19:42 +0000 (+0100)
Subject: usermem_std-z80-thunked: Fix return codes
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=f0fdd1f65e7a8e9aabe70b357753ce8881260b46;p=FUZIX.git

usermem_std-z80-thunked: Fix return codes

With this fixed the Sam port gets as far as fork and then (not unexpectedly)
suffers a terminal existence failure.
---

diff --git a/Kernel/usermem_std-z80-thunked.s b/Kernel/usermem_std-z80-thunked.s
index db83917c..65dd9e57 100644
--- a/Kernel/usermem_std-z80-thunked.s
+++ b/Kernel/usermem_std-z80-thunked.s
@@ -134,6 +134,7 @@ uget1:	; not split
 	ldir
 uget_out:
 	pop ix
+	ld hl,#0
 	jp map_kernel_low
 
 __uput:
@@ -153,6 +154,7 @@ __uput:
 uput1:
 	ldir
 	pop ix
+	ld hl,#0
 	jp map_kernel_low
 
 __uzero:
@@ -175,6 +177,7 @@ zeroit_1:
 	call user_mapping
 	call zeroit
 	pop ix
+	ld hl,#0
 	ret
 zeroit:
 	ld (hl),#0