From: Alan Cox <alan@linux.intel.com>
Date: Mon, 9 Mar 2015 21:39:45 +0000 (+0000)
Subject: libs: Add enter.s for __enter and __enter_s for the modified sdcc
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=78a657370af64d7c0ee2c09e53f4316e0a2ac830;p=FUZIX.git

libs: Add enter.s for __enter and __enter_s for the modified sdcc
---

diff --git a/Library/libs/Makefile b/Library/libs/Makefile
index 2bcb8ed3..665ccfdf 100644
--- a/Library/libs/Makefile
+++ b/Library/libs/Makefile
@@ -14,7 +14,7 @@ ASM_OPT = -l -o -s
 LINKER_OPT = -m -i -o
 SRC_CRT0 = crt0$(PLATFORM).s
 OBJ_CRT0 = $(SRC_CRT0:.s=.rel)
-SRC_ASM =
+SRC_ASM = enter.s
 OBJ_ASM = $(SRC_ASM:.s=.rel)
 SRC_C =  __argv.c abort.c asctime.c assert.c atexit.c
 SRC_C += bcmp.c bcopy.c bsearch.c bzero.c calloc.c cfree.c clock.c closedir.c
diff --git a/Library/libs/enter.s b/Library/libs/enter.s
new file mode 100644
index 00000000..b5d08f14
--- /dev/null
+++ b/Library/libs/enter.s
@@ -0,0 +1,25 @@
+;
+;	These are used for space saving with the modified sdcc
+;
+	.globl __enter, __enter_s
+
+__enter:
+	pop hl		; return address
+	push ix		; save frame pointer
+	ld ix, #0
+	add ix, sp	; set ix to the stack frame
+	jp (hl)		; and return
+
+__enter_s:
+	pop hl		; return address
+	push ix		; save frame pointer
+	ld ix, #0
+	add ix, sp	; frame pointer
+	ld e, (hl)	; size byte
+	ld d, #0xFF	; always minus something..
+	inc hl
+	ex de, hl
+	add hl, sp
+	ld sp, hl
+	push de
+	ret