Import the FreeBSD/arm libc bits.

Obtained from:	NetBSD

1 files changed, 132 insertions, 0 deletions

diff --git a/lib/libc/arm/gen/setjmp.S b/lib/libc/arm/gen/setjmp.S
new file mode 100644
index 0000000..be12412
--- /dev/null
+++ b/lib/libc/arm/gen/setjmp.S
@@ -0,0 +1,132 @@
+/*	$NetBSD: setjmp.S,v 1.5 2003/04/05 23:08:51 bjh21 Exp $	*/
+
+/*
+ * Copyright (c) 1997 Mark Brinicombe
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Mark Brinicombe
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+/*
+ * C library -- setjmp, longjmp
+ *
+ *	longjmp(a,v)
+ * will generate a "return(v)" from the last call to
+ *	setjmp(a)
+ * by restoring registers from the stack.
+ * The previous signal state is restored.
+ */
+
+#define SOFTFLOAT /* XXX */
+ENTRY(setjmp)
+	/* Block all signals and retrieve the old signal mask */
+	stmfd	sp!, {r0, r14}
+	mov	r0, #0x00000000
+
+	bl	PIC_SYM(_C_LABEL(sigblock), PLT)
+	mov	r1, r0
+
+	ldmfd	sp!, {r0, r14}
+
+	/* Store signal mask */
+	str	r1, [r0, #(25 * 4)]
+
+	ldr	r1, .Lsetjmp_magic
+	str	r1, [r0], #4
+
+#ifdef SOFTFLOAT
+	add	r0, r0, #52
+#else
+	/* Store fp registers */
+	sfm	f4, 4, [r0], #48
+	/* Store fpsr */
+	rfs	r1
+	str	r1, [r0], #0x0004
+#endif	/*SOFTFLOAT*/
+	/* Store integer registers */
+        stmia	r0, {r4-r14}
+        mov	r0, #0x00000000
+        mov	r15, r14
+
+.Lsetjmp_magic:
+	.word	_JB_MAGIC_SETJMP
+
+
+.weak _C_LABEL(longjmp)
+.set _C_LABEL(longjmp), _C_LABEL(__longjmp)
+ENTRY(__longjmp)
+	ldr	r2, .Lsetjmp_magic
+	ldr	r3, [r0]
+	teq	r2, r3
+	bne	botch
+
+	/* Fetch signal mask */
+	ldr	r2, [r0, #(25 * 4)]
+
+	/* Set signal mask */
+	stmfd	sp!, {r0, r1, r14}
+	sub	sp, sp, #4	/* align the stack */
+
+	mov	r0, r2
+	bl	PIC_SYM(_C_LABEL(sigsetmask), PLT)
+
+	add	sp, sp, #4	/* unalign the stack */
+	ldmfd	sp!, {r0, r1, r14} 
+
+	add	r0, r0, #4
+#ifdef SOFTFLOAT
+	add	r0, r0, #52
+#else
+	/* Restore fp registers */
+	lfm	f4, 4, [r0], #48
+	/* Restore FPSR */
+	ldr	r4, [r0], #0x0004
+	wfs	r4
+#endif	/* SOFTFLOAT */
+	/* Restore integer registers */
+        ldmia	r0, {r4-r14}
+
+	/* Validate sp and r14 */
+	teq	sp, #0
+	teqne	r14, #0
+	beq	botch
+
+	/* Set return value */
+
+	mov	r0, r1
+	teq	r0, #0x00000000
+	moveq	r0, #0x00000001
+	mov	r15, r14
+
+	/* validation failed, die die die. */
+botch:
+	bl	PIC_SYM(_C_LABEL(longjmperror), PLT)
+	bl	PIC_SYM(_C_LABEL(abort), PLT)
+	b	. - 8		/* Cannot get here */