1 files changed, 136 insertions, 0 deletions
diff --git a/newlib/libc/machine/i386/setjmp.S b/newlib/libc/machine/i386/setjmp.S
new file mode 100644
index 00000000000..0f4b537b96d
--- /dev/null
+++ b/newlib/libc/machine/i386/setjmp.S
@@ -0,0 +1,136 @@
+/* This is file is a merger of SETJMP.S and LONGJMP.S */
+/*
+ *  This file was modified to use the __USER_LABEL_PREFIX__ and
+ *  __REGISTER_PREFIX__ macros defined by later versions of GNU cpp by
+ *  Joel Sherrill (joel@OARcorp.com)
+ *
+ ** Copyright (C) 1991 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
+ **	 0   4   8   12  16  20  24  28  32
+ */
+
+/* These are predefined by new versions of GNU cpp.  */
+ 
+#ifndef __USER_LABEL_PREFIX__
+#define __USER_LABEL_PREFIX__ _
+#endif
+ 
+/***************************** TEMPORARY ******************************
+ * 
+ *  It appears that the i386-coff configuration of gcc 2.6.2 does not
+ *  do the __REGISTER_PREFIX__ correctly.  Fix this when it does.
+ **********************************************************************/
+#define __REGISTER_PREFIX__ %
+#ifndef __REGISTER_PREFIX__
+#define __REGISTER_PREFIX__ 
+#endif
+ 
+/* ANSI concatenation macros.  */
+ 
+#define CONCAT1(a, b) CONCAT2(a, b)
+#define CONCAT2(a, b) a ## b
+ 
+/* Use the right prefix for global labels.  */
+ 
+#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
+ 
+/* Use the right prefix for registers.  */
+ 
+#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
+ 
+#define eax REG (eax)
+#define ebx REG (ebx)
+#define ecx REG (ecx)
+#define edx REG (edx)
+#define esi REG (esi)
+#define edi REG (edi)
+#define ebp REG (ebp)
+#define esp REG (esp)
+ 
+#define ax REG (ax)
+#define bx REG (bx)
+#define cx REG (cx)
+#define dx REG (dx)
+
+#define ah REG (ah)
+#define bh REG (bh)
+#define ch REG (ch)
+#define dh REG (dh)
+
+#define al REG (al)
+#define bl REG (bl)
+#define cl REG (cl)
+#define dl REG (dl)
+
+        .global SYM (setjmp)
+        .global SYM (longjmp)
+ 
+SYM (setjmp):
+
+	pushl	ebp
+	movl	esp,ebp
+
+	pushl	edi
+	movl	8 (ebp),edi
+
+	movl	eax,0 (edi)
+	movl	ebx,4 (edi)
+	movl	ecx,8 (edi)
+	movl	edx,12 (edi)
+	movl	esi,16 (edi)
+
+	movl	-4 (ebp),eax
+	movl	eax,20 (edi)
+
+	movl	0 (ebp),eax
+	movl	eax,24 (edi)
+
+	movl	esp,eax
+	addl	$12,eax
+	movl	eax,28 (edi)
+	
+	movl	4 (ebp),eax
+	movl	eax,32 (edi)
+
+	popl	edi
+	movl	$0,eax
+	leave
+	ret
+
+SYM (longjmp):
+	pushl	ebp
+	movl	esp,ebp
+
+	movl	8(ebp),edi	/* get jmp_buf */
+	movl	12(ebp),eax	/* store retval in j->eax */
+	movl	eax,0(edi)
+
+	movl	24(edi),ebp
+
+	cli
+	movl	28(edi),esp
+	
+	pushl	32(edi)	
+
+	movl	0(edi),eax
+	movl	4(edi),ebx
+	movl	8(edi),ecx
+	movl	12(edi),edx
+	movl	16(edi),esi
+	movl	20(edi),edi
+	sti
+
+	ret