Initial sparc port, thanks to Mathew Bosworth <mbosworth@metaflow.com>,

who sent this to me a month ago and I forgot to check it in.  Oops.
Better late then never.
 -Erik

1 files changed, 90 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/sparc/crt0.S b/libc/sysdeps/linux/sparc/crt0.S
new file mode 100644
index 000000000..7910131db
--- /dev/null
+++ b/libc/sysdeps/linux/sparc/crt0.S
@@ -0,0 +1,90 @@
+/*
+ * xrt0.s for ERC32. 
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 675
+ * Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+/* code taken from leonccs 1.0 leon/src/libio/crt0.S 
+	I don't know if this is available anymore, now that LECCS
+	is out.  And I'm not sure if this source is in the LECCS distro  :(
+*/
+
+	.text
+! Original : 
+!	.global __start, _main
+! uC-libc version : 
+	.global _start
+	.global __uClibc_main
+
+! Start the real-time clock with a tick of 14 clocks
+!
+
+_start:
+
+	save	%sp, -64, %sp
+
+        /* clear the bss */
+ 
+        sethi %hi(edata),%g2
+        or    %g2,%lo(edata),%g2  ! g2 = start of bss
+        sethi %hi(_end),%g3
+        or    %g3,%lo(_end),%g3         ! g3 = end of bss
+        mov   %g0,%g1                   ! so std has two zeros
+zerobss:
+        std    %g0,[%g2]
+        add    %g2,8,%g2
+        cmp    %g2,%g3
+        bleu,a zerobss
+        nop
+
+        /* move data segment to proper location */
+ 
+relocd:
+        set (_endtext),%g2 		! g2 = start of data in aout file
+        set (_environ),%g4		! g4 = start of where data should go
+        set (_edata),%g3 		! g3 = end of where data should go
+	subcc	%g3, %g4, %g5		! g5 = length of data
+
+	subcc	%g4, %g2, %g0		! need to relocate data ?
+	ble	initok
+	ld	[%g4], %g6
+!	subcc	%g6, 1, %g0
+!	be	initok
+mvdata:
+	subcc	%g5, 8, %g5
+	ldd	[%g2 + %g5], %g6
+	bg	mvdata
+        std    	%g6, [%g4 + %g5]
+
+initok:
+
+!	call    _main
+	call	__uClibc_main
+        nop
+! Should not return from uClibc main()
+!	ret
+!	nop
+
+        .seg    "data"
+        .global .bdata
+.bdata:
+        .align  8
+        .global _environ                ! first symbol in sdata
+_environ:
+        .word   1
+
+
+