From 4d3c7f75e644c67e3110fa7ded9eb6af696f8ef2 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Fri, 15 Nov 2002 13:46:14 +0000
Subject: Stefan Allius writes:

    I attached a patch, which revise the clone.S and vfork.S:
        - Use PIC code.
        - include new file syscall.S, so we can simply make a branch to
          __syscall_error instead of a PLT/GOT call
        - call errno_location to store the syscall error (for pthreads)
        - avoid to use the 'shad' statement on SH2 targets
        - call fork if vfork isn't available
        - some cleanups and optimization
---
 libc/sysdeps/linux/sh/syscall_error.S | 37 +++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 libc/sysdeps/linux/sh/syscall_error.S

(limited to 'libc/sysdeps/linux/sh/syscall_error.S')

diff --git a/libc/sysdeps/linux/sh/syscall_error.S b/libc/sysdeps/linux/sh/syscall_error.S
new file mode 100644
index 000000000..7115120db
--- /dev/null
+++ b/libc/sysdeps/linux/sh/syscall_error.S
@@ -0,0 +1,37 @@
+	.align 4
+__syscall_error:
+	/* Call errno_location, store '-r4' in errno and return -1 */
+	mov.l	r12, @-r15
+	sts.l	pr, @-r15
+#if defined __HAVE_ELF__ && defined __HAVE_SHARED__ 
+	mova	.LG, r0
+	mov.l	.LG, r12
+	add	r0, r12
+	mov.l	1f, r0
+	mov.l	@(r0,r12),r0
+ 	jsr	@r0
+	 neg	r4, r12
+#else	
+	mov.l	1f, r0
+	bsrf	r0
+	 neg	r4, r12
+.jmp_loc:		
+#endif
+	mov.l	r12, @r0
+	lds.l	@r15+, pr
+	mov.l	@r15+,r12
+
+	/* And just kick back a -1.  */
+	rts
+	 mov	#-1, r0
+
+	.align	4
+
+#if defined __HAVE_ELF__ && defined __HAVE_SHARED__ 
+1:	.long   __errno_location@GOT
+.LG:	.long	_GLOBAL_OFFSET_TABLE_
+#else
+1:	.long   __errno_location - .jmp_loc
+#endif		
+
+
-- 
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