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xburst-tools/xbboot/target-echokernel/head.S
2010-04-28 18:29:53 +08:00

35 lines
728 B
ArmAsm

//
// Authors: Wolfgang Spraul <wolfgang@sharism.cc>
//
// 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
// 3 of the License, or (at your option) any later version.
//
.text
.extern pre_main
.globl _start
.set noreorder
_start:
b real_start
nop
.word 0x0 // its address == start address + 8
.word 0x0
.word 0x0
.word 0x0
.word 0x0
.word 0x0
.word 0x0
.word 0x0
real_start:
/* setup stack, jump to C code */
add $29, $20, 0x3ffff0 // sp locate at start address offset 0x2ffff0
add $25, $20, 0x40 // t9 = pre_main()
j $25
nop
.set reorder