source: mainline/uspace/lib/c/arch/ia64/src/crt0.S

#
# Copyright (c) 2006 Jakub Jermar
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
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# - Redistributions in binary form must reproduce the above copyright
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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#include <abi/asmtool.h>

.text

.org 0
.align 16

## User-space task entry point
#
# r2 contains the PCB pointer
#
SYMBOL(_start)
        alloc loc0 = ar.pfs, 0, 1, 2, 0
        movl gp = __gp

        # Pass PCB pointer as the first argument to __c_start
        mov out0 = r2 ;;
        br.call.sptk.many b0 = __c_start