From: Alan Cox <alan@linux.intel.com>
Date: Sun, 13 Nov 2016 00:07:15 +0000 (+0000)
Subject: 68000: add setjmp
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=05354b492a1f941ce19a0e2d00d711f9d55b8b63;p=FUZIX.git

68000: add setjmp
---

diff --git a/Library/libs/setjmp_68000.S b/Library/libs/setjmp_68000.S
new file mode 100644
index 00000000..4c45a89a
--- /dev/null
+++ b/Library/libs/setjmp_68000.S
@@ -0,0 +1,24 @@
+/* setjmp for 68000 and gcc.
+
+   The called function is expected to save registers it damages so we need
+   to do a full save here expect for a0/a1 d0/d1 which are scratch */
+
+	.text
+	.globl setjmp
+	.globl longjmp
+.mri 1
+
+setjmp:
+	tst.l d0
+	bne _setok
+	addq #1,d0			; never return 0 on longjmp
+_setok:	move.l 4(sp),a0
+	add #48,a0
+	movem.l d2-d7/a2-a7,-(a0)	; 12 * 4 = 48 bytes
+	moveq #0,d0			; return 0 from setjmp
+	rts
+
+longjmp:
+	move.l 4(sp),a0
+	movem.l (a0)+,d2-d7/a2-a7
+	rts