56 lines
2.6 KiB
ArmAsm
56 lines
2.6 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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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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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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