From 00422f5696652c04b919d6984adb2cdc21fd6955 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Fri, 27 May 2005 00:23:45 +0000
Subject: With a bit of luck, this might just get mips working again

---
 libc/sysdeps/linux/mips/crt1.S | 124 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 libc/sysdeps/linux/mips/crt1.S

(limited to 'libc/sysdeps/linux/mips/crt1.S')

diff --git a/libc/sysdeps/linux/mips/crt1.S b/libc/sysdeps/linux/mips/crt1.S
new file mode 100644
index 000000000..b9a206e01
--- /dev/null
+++ b/libc/sysdeps/linux/mips/crt1.S
@@ -0,0 +1,124 @@
+/* Startup code compliant to the ELF Mips ABI.
+   Copyright (C) 1995, 1997, 2000, 2001, 2002, 2003, 2004
+	Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file with other
+   programs, and to distribute those programs without any restriction
+   coming from the use of this file. (The GNU Lesser General Public
+   License restrictions do apply in other respects; for example, they
+   cover modification of the file, and distribution when not linked
+   into another program.)
+
+   Note that people who make modified versions of this file are not
+   obligated to grant this special exception for their modified
+   versions; it is their choice whether to do so. The GNU Lesser
+   General Public License gives permission to release a modified
+   version without this exception; this exception also makes it
+   possible to release a modified version which carries forward this
+   exception.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+
+#include <features.h>
+#include <sys/regdef.h>
+
+
+
+/* This is the canonical entry point, usually the first thing in the text
+   segment.  The SVR4/Mips ABI (pages 3-31, 3-32) says that when the entry
+   point runs, most registers' values are unspecified, except for:
+
+   v0 ($2)	Contains a function pointer to be registered with `atexit'.
+		This is how the dynamic linker arranges to have DT_FINI
+		functions called for shared libraries that have been loaded
+		before this code runs.
+
+   sp ($29)	The stack contains the arguments and environment:
+		0(%esp)			argc
+		4(%esp)			argv[0]
+		...
+		(4*argc)(%esp)		NULL
+		(4*(argc+1))(%esp)	envp[0]
+		...
+					NULL
+   ra ($31)	The return address register is set to zero so that programs
+		that search backword through stack frames recognize the last
+		stack frame.
+*/
+
+
+/* We need to call:
+   __uClibc_start_main (int (*main) (int, char **, char **), int argc,
+		      char **argv, void (*init) (void), void (*fini) (void),
+		      void (*rtld_fini) (void), void *stack_end)
+*/
+
+.text
+	.global	_start
+	.type	_start,%function
+	.type	_init,%function
+	.type	_fini,%function
+	.type	main,%function
+	.type	__uClibc_start_main,%function
+
+__start:
+#ifdef __PIC__
+        .set noreorder
+	move $0, $31		/* Save old ra.  */
+	bal 10f			/* Find addr of cpload.  */
+        nop
+10:
+	.cpload $31;
+	move $31, $0;
+	.set reorder
+#else
+	la $28, _gp             /* Setup GP correctly if we're non-PIC.  */
+	move $31, $0
+#endif
+
+
+	la $4, main		/* main */
+	lw $5, 0($29)		/* argc */
+	addiu $6, $29, 4	/* argv  */
+
+	/* Allocate space on the stack for seven arguments (o32 only)
+	   and make sure the stack is aligned to double words (8 bytes)
+	   on o32 and quad words (16 bytes) on n32 and n64.  */
+	and $29, -2 * 4
+	subu $29, 32
+	la $7, _init		/* init */
+	la $8, _fini
+	sw $8, 16($29)		/* fini */
+	sw $2, 20($29)		/* rtld_fini */
+	sw $29, 24($29)		/* stack_end */
+	jal __uClibc_start_main
+hlt:
+	/* Crash if somehow `__uClibc_start_main' returns anyway.  */
+	b   hlt
+
+/* Define a symbol for the first piece of initialized data.  */
+	.data
+	.globl __data_start
+__data_start:
+	.long 0
+	.weak data_start
+	data_start = __data_start
+
+
-- 
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