newlib/libgloss/microblaze/sim-crtinit.S

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## Copyright (c) 2001, 2009 Xilinx, Inc. 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 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
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##
## 3. Neither the name of Xilinx 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 COPYRIGHT HOLDER AND CONTRIBUTORS "AS
## IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
## TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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#
#
# sim-crtinit.s
#
# Default second stage of C run-time initialization that does not peform
# BSS initialization to zero. Typical use is on a simulator.
#
.globl _crtinit
.align 2
.ent _crtinit
_crtinit:
addi r1, r1, -20 /* Save Link register */
swi r15, r1, 0
brlid r15, _program_init /* Initialize the program */
nop
brlid r15, __init /* Invoke language initialization functions */
nop
addi r6, r0, 0 /* Initialize argc = 1 and argv = NULL and envp = NULL */
addi r7, r0, 0
brlid r15, main /* Execute the program */
addi r5, r0, 0
addik r19, r3, 0 /* Save return value */
brlid r15, __fini /* Invoke language cleanup functions */
nop
brlid r15, _program_clean /* Cleanup the program */
nop
lw r15, r1, r0 /* Return back to CRT */
addik r3, r19, 0 /* Restore return value */
rtsd r15, 8
addi r1, r1, 20
.end _crtinit