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+/*
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+ * libc/sysdeps/linux/microblaze/crt1.S -- Initial program entry point for linux/microblaze
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+ *
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+ * Copyright (C) 2009 Meyer Sound Laboratories
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+ * Copyright (C) 2003 John Williams <jwilliams@itee.uq.edu.au>
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+ * Copyright (C) 2001,2002 NEC Corporation
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+ * Copyright (C) 2001,2002 Miles Bader <miles@gnu.org>
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+ *
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+ * This file is subject to the terms and conditions of the GNU Lesser
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+ * General Public License. See the file COPYING.LIB in the main
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+ * directory of this archive for more details.
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+ *
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+ * Written by Miles Bader <miles@gnu.org>
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+ */
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+
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+#include <libc-symbols.h>
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+
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+/* Upon entry, the stack contains the following data:
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+ argc, argv[0], ..., argv[argc-1], 0, envp[0], ..., 0
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+*/
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+
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+ .text
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+ .globl C_SYMBOL_NAME(_start)
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+ .align 4
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+C_SYMBOL_NAME(_start):
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+
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+ /* Load SDAs */
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+ la r2, r0, C_SYMBOL_NAME(_SDA2_BASE_) /* in the original source r2 was SDA, and r13 was SDA2, no idea why */
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+ la r13, r0, C_SYMBOL_NAME(_SDA_BASE_)
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+
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+ /*
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+ Preparing arguments for uClibc's startup routine.
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+ The routine has 6 arguments, so 5 of them are placed
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+ into registers, one on the stack
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+ */
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+
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+ la r5, r0, C_SYMBOL_NAME(main) /* Arg 1: main() */
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+ lw r6, r0, r1 /* Arg 2: argc */
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+ addi r7, r1, 4 /* Arg 3: argv */
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+ la r8, r0, _init /* Arg 4: init */
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+ la r9, r0, _fini /* Arg 5: fini */
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+ addk r10,r0,r0 /* Arg 6: rtld_fini = NULL */
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+
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+
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+ /* Reserve space for __uClibc_main to save parameters
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+ (Microblaze ABI stack calling convention)
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+ and for stack_end argument to __uClibc_main */
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+ add r3, r1, r0
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+ addi r1, r1, -32
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+
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+ /* tail-call uClibc's startup routine */
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+ brid C_SYMBOL_NAME(__uClibc_main)
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+ swi r3, r1, 28 /* Arg 7: stack end [DELAY SLOT] */
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+
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+/* Define a symbol for the first piece of initialized data. */
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+ .data
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+ .globl __data_start
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+__data_start:
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+ .long 0
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+ .weak data_start
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+ data_start = __data_start
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