53 lines
2.5 KiB
ArmAsm
53 lines
2.5 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/runtime/internal.h"
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#include "libc/macros.h"
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.text.startup
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.source __FILE__
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/ Calls global initialization functions.
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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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_construct:
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push %rbp
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mov %rsp,%rbp
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ezlea __init_array_start,ax # static ctors in forward order
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.weak __init_array_start # could be called multiple times
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ezlea __init_array_end,cx # idempotency recommended
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.weak __init_array_end # @see ape/ape.lds
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1: cmp %rax,%rcx
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je 2f
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push %rax
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push %rcx
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mov %r12,%rdi
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mov %r13,%rsi
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mov %r14,%rdx
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mov %r15,%rcx
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call *(%rax)
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pop %rcx
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pop %rax
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add $8,%rax
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jmp 1b
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2: pop %rbp
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ret
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.endfn _construct,globl
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