mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-10-26 03:00:57 +00:00
40 lines
2.6 KiB
ArmAsm
40 lines
2.6 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
|
|
│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/macros.internal.h"
|
|
.source __FILE__
|
|
|
|
// Allocates uninitialized memory.
|
|
//
|
|
// Returns a pointer to a newly allocated chunk of at least n bytes, or
|
|
// null if no space is available, in which case errno is set to ENOMEM
|
|
// on ANSI C systems.
|
|
//
|
|
// If n is zero, malloc returns a minimum-sized chunk. (The minimum size
|
|
// is 32 bytes on 64bit systems.) Note that size_t is an unsigned type,
|
|
// so calls with arguments that would be negative if signed are
|
|
// interpreted as requests for huge amounts of space, which will often
|
|
// fail. The maximum supported value of n differs across systems, but is
|
|
// in all cases less than the maximum representable value of a size_t.
|
|
//
|
|
// @param rdi is number of bytes needed
|
|
// @return new memory, or NULL w/ errno
|
|
// @note malloc(0) → malloc(32)
|
|
// @see dlmalloc()
|
|
malloc: jmp *hook_malloc(%rip)
|
|
.endfn malloc,globl
|