From f95a4a932476be2ba99e2fd081e8d2bc6ea12813 Mon Sep 17 00:00:00 2001
From: PikalaxALT <pikalaxalt@gmail.com>
Date: Fri, 15 Dec 2017 09:38:53 -0500
Subject: Import newlib and create makefile

---
 newlib/libc/sys/go32/longjmp.S | 65 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 newlib/libc/sys/go32/longjmp.S

(limited to 'newlib/libc/sys/go32/longjmp.S')

diff --git a/newlib/libc/sys/go32/longjmp.S b/newlib/libc/sys/go32/longjmp.S
new file mode 100644
index 0000000..d29eebb
--- /dev/null
+++ b/newlib/libc/sys/go32/longjmp.S
@@ -0,0 +1,65 @@
+/* This is file LONGJMP.S */
+/*
+** Copyright (C) 1993 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954
+**
+** This file is distributed under the terms listed in the document
+** "copying.dj", available from DJ Delorie at the address above.
+** A copy of "copying.dj" should accompany this file; if not, a copy
+** should be available from where this file was obtained.  This file
+** may not be distributed without a verbatim copy of "copying.dj".
+**
+** This file is distributed WITHOUT ANY WARRANTY; without even the implied
+** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+*/
+
+/*
+**	jmp_buf:
+**	 eax ebx ecx edx esi edi ebp esp eip es fs gs ss
+**	 0   4   8   12  16  20  24  28  32  36 38 40 42
+*/
+
+	.globl	_longjmp /* jmp_buf, int */
+_longjmp:
+	pushl	%ebp
+	movl	%esp,%ebp
+
+	movl	8(%ebp),%edi	/* get jmp_buf */
+	movl	12(%ebp),%eax	/* store retval in j->eax */
+	testl	%eax,%eax
+	jne 0f
+	incl %eax
+0:
+	movl	%eax,0(%edi)
+
+	movl	24(%edi),%ebp
+
+	pushfl			/* get flags so will only re-enable */
+	popl	%ebx		/* interrupts if they were previously */
+				/* enabled */
+
+	cli
+	movw	42(%edi),%ax
+	movw	%ax,%ss
+	movl	28(%edi),%esp
+	
+	pushl	32(%edi)	/* for a ret! */
+
+        pushl	%ebx		/* save flags that contain previous */
+				/* interrupt state */
+
+	movw	36(%edi),%ax
+	movw	%ax,%es
+	movw	38(%edi),%ax
+	movw	%ax,%fs
+	movw	40(%edi),%ax
+	movw	%ax,%gs
+	movl	0(%edi),%eax
+	movl	4(%edi),%ebx
+	movl	8(%edi),%ecx
+	movl	12(%edi),%edx
+	movl	16(%edi),%esi
+	movl	20(%edi),%edi
+
+	popfl			/* restore previous interrupt state */
+
+	ret			/* actually jump to new eip */
-- 
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