41 lines
2.6 KiB
ArmAsm
41 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/macros.h"
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.source __FILE__
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/ Allocates uninitialized memory.
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/
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/ Returns a pointer to a newly allocated chunk of at least n bytes, or
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/ null if no space is available, in which case errno is set to ENOMEM
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/ on ANSI C systems.
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/
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/ If n is zero, malloc returns a minimum-sized chunk. (The minimum size
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/ is 32 bytes on 64bit systems.) Note that size_t is an unsigned type,
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/ so calls with arguments that would be negative if signed are
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/ interpreted as requests for huge amounts of space, which will often
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/ fail. The maximum supported value of n differs across systems, but is
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/ in all cases less than the maximum representable value of a size_t.
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/
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/ @param rdi is number of bytes needed
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/ @return new memory, or NULL w/ errno
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/ @note malloc(0) → malloc(32)
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/ @see dlmalloc()
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malloc: jmp *hook$malloc(%rip)
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.endfn malloc,globl
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