57 lines
2.7 KiB
ArmAsm
57 lines
2.7 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/dce.h"
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#include "libc/sysv/consts/prot.h"
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#include "libc/macros.h"
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/ Self-bootstraps process upon existence before calling main.
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/
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/ @param r12 is argc
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/ @param r13 is argv
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/ @param r14 is environ
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/ @param r15 is auxv
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_spawn: push %rbp
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mov %rsp,%rbp
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/ Tune FPU settings if -ffast-math is somehow used systemically.
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#ifdef __FAST_MATH__
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call __fast_math
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#endif
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/ Call decentralized initialization assembly.
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call _init
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#if IsModeDbg()
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call _init # _init() is idempotent
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#endif
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/ Call global initialization functions.
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call _construct
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/ Restricts .initbss memory so it's read-only after initialization.
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/ TODO: Delete this unless there's measurable performance advantage.
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#if !IsTrustworthy()
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mov $PROT_READ,%edi
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call _piro
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#endif
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pop %rbp
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ret
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.endfn _spawn,globl
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